CN110982234B - Preparation method of high-end photodiffusion polycarbonate - Google Patents
Preparation method of high-end photodiffusion polycarbonate Download PDFInfo
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- 239000004417 polycarbonate Substances 0.000 title claims abstract description 68
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000011787 zinc oxide Substances 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 47
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 235000021355 Stearic acid Nutrition 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 239000008117 stearic acid Substances 0.000 claims description 12
- 238000009834 vaporization Methods 0.000 claims description 12
- 230000008016 vaporization Effects 0.000 claims description 12
- 239000006200 vaporizer Substances 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 abstract description 12
- 238000002834 transmittance Methods 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 6
- 238000012986 modification Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 10
- 239000002131 composite material Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000002861 polymer material Substances 0.000 description 6
- 239000012527 feed solution Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- -1 poly diallyl diethylene glycol dicarbonate Chemical compound 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention relates to the field of polycarbonate modification, in particular to a preparation method of high-end photodiffusion polycarbonate. The preparation method comprises the following steps: firstly, carrying out surface modification on nano zinc oxide to prepare modified nano zinc oxide powder; and adding the modified nano ZnO powder into the polycarbonate melt in proportion, electrically stirring at a high speed to obtain the high-end photodiffusion polycarbonate melt, extruding, blending, granulating, and mixing by an open mill, an internal mixer or a screw mixer to prepare and mold. The high-end light diffusion polycarbonate prepared by the invention has the advantages of uniform light, excellent light diffusion degree and light transmittance and good mechanical property.
Description
Technical Field
The invention relates to the field of polycarbonate modification, in particular to a preparation method of high-end photodiffusion polycarbonate.
Background
Under the background that the concern of global energy shortage rises again at present, energy conservation is a problem facing the future, in the field of illumination, the application of LED luminous products attracts people's attention, and LED as a novel green light source product is inevitably a trend of future development. When the novel LED point light source is widely applied to the lighting lamp industry, in order to weaken uncomfortable stimulation of single-point intensity of the LED light source to vision, the lamp industry has appeared a large number of applications of the diffusion plate in lighting products. Light diffusion materials are widely used in the lighting industry, especially in the field of LED lighting.
The light diffusing material is evaluated not only from light transmittance but also from haze. The polycarbonate has good light transmittance and excellent mechanical property as a common light diffusion material. However, as LED materials, polycarbonate is required to have higher light transmittance and haze, and therefore, it is necessary to modify the light scattering of polycarbonate so that the light scattering occurs.
Chinese patent CN104650569A discloses a polycarbonate nano zinc oxide composite material, which consists of polycarbonate and nano zinc oxide dispersed in the polycarbonate, wherein the nano zinc oxide accounts for 0.5 to 10 percent of the total mass of the composite material. The preparation method of the composite material comprises the step of carrying out melt blending and extrusion blending on the polycarbonate and the nano zinc oxide in the ratio, or carrying out mixing preparation on the polycarbonate and the nano zinc oxide by various open mills, internal mixers and screw mixing mills, or carrying out in-situ polymerization. The patent application effectively improves the light transmittance and the refractive index of the polycarbonate composite material by modifying the polycarbonate composite material by using the silane coupling agent. But the organic modifier has poor binding force with zinc oxide powder, easy separation, poor dispersion performance, complex modification process and harsh conditions.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
Aiming at overcoming the defects in the prior art, the invention provides a preparation method of high-end light scattering polycarbonate.
The above purpose of the invention is realized by the following technical scheme:
a preparation method of high-end photodiffusion polycarbonate comprises the following steps:
firstly, carrying out surface modification on nano zinc oxide to prepare modified nano zinc oxide powder; and adding the modified nano ZnO powder into the polycarbonate melt in proportion, electrically stirring at a high speed to obtain the high-end photodiffusion polycarbonate melt, extruding, blending, granulating, and mixing by an open mill, an internal mixer or a screw mixer to prepare and mold.
Specifically, the preparation method of the high-end photodiffusion polycarbonate comprises the following steps:
a. dissolving stearic acid with a prescription amount in an organic solvent to prepare a feed liquid 1;
b. dissolving a prescription amount of silane coupling agent in an organic solvent to prepare a feed liquid 2;
c. placing the nano zinc oxide powder in the cavity of a fluidized bed reactor according to the prescription amount, starting a vacuum pump, vacuumizing the fluidized bed reactor, introducing nitrogen from a gas injection port, controlling the introduction amount through a pressure gauge, and adjusting the gas flow to keep the nano zinc oxide powder in a suspended state;
d. starting a sample injection pump 2, sucking the feed liquid 2 into a liquid vaporizer, introducing the feed liquid into a fluidized bed reactor after vaporization treatment, starting a sample injection pump 1 after spraying for a period of time, sucking the feed liquid 1 into the liquid vaporizer, and introducing the feed liquid into the fluidized bed reactor for spraying after vaporization treatment;
e. d, transferring the substance obtained in the step d into a drying device, and drying to obtain modified nano ZnO powder;
f. and (e) taking polycarbonate, heating and melting to obtain a polycarbonate melt, adding the nano ZnO powder obtained in the step e into the polycarbonate melt, electrically stirring at a high speed to obtain the high-end photodiffusion polycarbonate melt, extruding, blending, granulating, and mixing by using an open mill, an internal mixer or a screw mixer to prepare and mold.
The surface of the zinc oxide is hydrophilic and oleophobic, presents polarity, is difficult to be uniformly dispersed in organic polymers, and simultaneously has larger specific surface area and higher surface energy, so that the zinc oxide is easy to agglomerate and is difficult to be dispersed in organic media, thereby influencing the actual efficacy of the nano zinc oxide. According to the modified zinc oxide provided by the invention, stearic acid has a large number of carboxyl groups, and the surface of the zinc oxide has hydrophilicity, so that the stearic acid is coated on the surface of the zinc oxide, but when more stearic acid is coated, the binding force is relatively weak.
Preferably, the silane coupling agent in step b is K550, K570 or K560.
Preferably, the solvent in step a or b is any one of n-butanol, ethanol and toluene.
Preferably, the mass ratio of the silane coupling agent to the nano ZnO is (0.6-0.8): 1.
Preferably, the mass ratio of the stearic acid to the nano ZnO is (0.6-0.8): 1.
Preferably, the mass ratio of the nano ZnO to the polycarbonate is 1: (8-10).
Furthermore, the gas flow in the step c is 3.5-4.5L/min.
And furthermore, in the step d, the feeding speed of the feeding liquid 2 is 1.6 g-2 g/min, and the feeding speed of the feeding liquid 1 is 3 g-4 g/min.
Further, the high-speed electric stirring time is 1-3 h.
The preparation method has the beneficial effects that the nano zinc oxide is dispersed into the polycarbonate to prepare the polycarbonate composite material. Zinc oxide has a high refractive index and good transparency, and its processability is good.
The surface of the nano zinc oxide powder is modified, so that the dispersion of the zinc oxide nano powder in organic matters can be assisted. The invention further modifies the surface of the zinc oxide, so that the binding force between the organic film layer and the zinc oxide powder is high, and the prepared modified zinc oxide has good dispersibility in the polycarbonate and does not influence the mechanical property of the polycarbonate.
And blending zinc oxide nano powder with a high polymer material to obtain the optical resin material with good transparency. Because the zinc oxide nano powder has higher hardness compared with the high polymer material, the prepared high polymer nano zinc oxide composite material has higher hardness and can change the friction performance of the high polymer material.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
The experimental procedures in the following examples are conventional unless otherwise specified.
The test materials used in the following examples were purchased from a conventional reagent store unless otherwise specified.
The following description is made with reference to specific embodiments:
example one
a. Dissolving 6 parts of stearic acid in 175ml of n-butanol to prepare a feed solution 1;
b. dissolving 6 parts of silane coupling agent K550 in 200ml of n-butyl alcohol to prepare feed liquid 2;
c. placing 10 parts of nano zinc oxide powder in a cavity of a fluidized bed reactor, starting a vacuum pump, vacuumizing the fluidized bed reactor, introducing nitrogen from a gas injection port, controlling the introduction amount through a pressure gauge, and adjusting the gas flow to be 3.5L/min so that the nano zinc oxide powder is in a suspended state;
d. starting a sample injection pump 2, sucking the feed liquid 2 into a liquid vaporizer, introducing the feed liquid into the fluidized bed reactor at a speed of 2g/min after vaporization treatment, starting the sample injection pump 1 after spraying for a period of time, sucking the feed liquid 1 into the liquid vaporizer, and introducing the feed liquid into the fluidized bed reactor at a speed of 3g/min after vaporization treatment for spraying;
e. d, transferring the substance obtained in the step d into a drying device, and drying to obtain modified nano ZnO powder;
f. and (e) taking 80 parts of polycarbonate, heating and melting to obtain a polycarbonate melt, adding the nano ZnO powder obtained in the step e into the polycarbonate melt, electrically stirring for 1h at a high speed to obtain a high-end light diffusion polycarbonate melt, extruding, blending, granulating, and mixing by a screw mixer to prepare the polycarbonate melt.
Example two
a. Dissolving 8 parts of stearic acid in 175ml of ethanol to prepare a feed solution 1;
b. dissolving 8 parts of silane coupling agent K570 in 200ml of ethanol to prepare a feed liquid 2;
c. placing 10 parts of nano zinc oxide powder in a cavity of a fluidized bed reactor, starting a vacuum pump, vacuumizing the fluidized bed reactor, introducing nitrogen from a gas injection port, controlling the introduction amount through a pressure gauge, and adjusting the gas flow to be 4L/min so that the nano zinc oxide powder is in a suspended state;
d. starting a sample injection pump 2, sucking the feed liquid 2 into a liquid vaporizer, introducing the feed liquid into the fluidized bed reactor at a speed of 1.6g/min after vaporization treatment, starting the sample injection pump 1 after spraying for a period of time, sucking the feed liquid 1 into the liquid vaporizer, and introducing the feed liquid into the fluidized bed reactor at a speed of 3.5g/min after vaporization treatment for spraying;
e. d, transferring the substance obtained in the step d into a drying device, and drying to obtain modified nano ZnO powder;
f. and (e) taking 100 parts of polycarbonate, heating and melting to obtain a polycarbonate melt, adding the nano ZnO powder obtained in the step e into the polycarbonate melt, electrically stirring for 2 hours at a high speed to obtain the high-end light diffusion polycarbonate melt, extruding, blending, granulating, and preparing and molding by using an open mill.
EXAMPLE III
a. Dissolving 7 parts of stearic acid in 175ml of n-butanol to prepare a feed solution 1;
b. dissolving 7 parts of silane coupling agent K560 in 200ml of n-butyl alcohol to prepare a feed solution 2;
c. placing 10 parts of nano zinc oxide powder in a cavity of a fluidized bed reactor, starting a vacuum pump, vacuumizing the fluidized bed reactor, introducing nitrogen from a gas injection port, controlling the introduction amount through a pressure gauge, and adjusting the gas flow to be 4.5L/min so that the nano zinc oxide powder is in a suspended state;
d. starting a sample injection pump 2, sucking the feed liquid 2 into a liquid vaporizer, introducing the feed liquid into the fluidized bed reactor at a speed of 1.8g/min after vaporization treatment, starting the sample injection pump 1 after spraying for a period of time, sucking the feed liquid 1 into the liquid vaporizer, and introducing the feed liquid into the fluidized bed reactor at a speed of 4g/min after vaporization treatment for spraying;
e. d, transferring the substance obtained in the step d into a drying device, and drying to obtain modified nano ZnO powder;
f. and (e) taking 90 parts of polycarbonate, heating and melting to obtain a polycarbonate melt, adding the nano ZnO powder obtained in the step (e) into the polycarbonate melt, electrically stirring for 3 hours at a high speed to obtain a high-end light diffusion polycarbonate melt, extruding, blending, granulating, and mixing by a screw mixer to prepare the polycarbonate melt.
Example four
a. Dissolving 7 parts of stearic acid in 175ml of toluene to prepare a feed solution 1;
b. 6 parts of silane coupling agent K550 is dissolved in 200ml of toluene to prepare feed liquid 2;
c. placing 10 parts of nano zinc oxide powder in a cavity of a fluidized bed reactor, starting a vacuum pump, vacuumizing the fluidized bed reactor, introducing nitrogen from a gas injection port, controlling the introduction amount through a pressure gauge, and adjusting the gas flow to be 4.5L/min so that the nano zinc oxide powder is in a suspended state;
d. starting a sample injection pump 2, sucking the feed liquid 2 into a liquid vaporizer, introducing the feed liquid into the fluidized bed reactor at a speed of 1.8g/min after vaporization treatment, starting the sample injection pump 1 after spraying for a period of time, sucking the feed liquid 1 into the liquid vaporizer, and introducing the feed liquid into the fluidized bed reactor at a speed of 3.5g/min after vaporization treatment for spraying;
e. d, transferring the substance obtained in the step d into a drying device, and drying to obtain modified nano ZnO powder;
f. and (e) taking 95 parts of polycarbonate, heating and melting to obtain a polycarbonate melt, adding the nano ZnO powder obtained in the step e into the polycarbonate melt, electrically stirring for 2 hours at a high speed to obtain the high-end light diffusion polycarbonate melt, extruding, blending, granulating, and preparing and molding by using a sealing mill.
Comparative example 1
Taking 90 parts of polycarbonate, heating and melting to obtain a polycarbonate melt, adding 10 parts of unmodified nano ZnO powder into the polycarbonate melt, electrically stirring for 2 hours at a high speed to obtain a high-end light diffusion polycarbonate melt, extruding, blending, granulating, and mixing by a screw mixer to prepare the polycarbonate melt.
Comparative example No. two
Dissolving 10 parts of nano zinc oxide powder in 375ml of n-butyl alcohol, stirring and dispersing, slowly adding 7 parts of silane coupling agent, stirring uniformly, adding 7 parts of stearic acid, naturally cooling to room temperature, filtering, and vacuum drying to obtain the surface modified nano zinc oxide powder.
Taking 90 parts of polycarbonate, heating and melting to obtain a polycarbonate melt, adding 10 parts of the surface-modified nano zinc oxide powder into the polycarbonate melt, stirring for 2 hours at a high speed by electric power to obtain a high-end light-diffusion polycarbonate melt, extruding, blending, granulating, and preparing and molding by using a blender.
Comparative example No. three
A polycarbonate and surface modifier modified zinc oxide composite material was prepared by the method in example 3 of CN 104650569A. Specifically, the nano zinc oxide powder wrapped with the dispersant silane coupling agent is prepared by a sol-gel method, wherein the silane coupling agent accounts for 0.5 percent of the total weight. And mixing the poly diallyl diethylene glycol dicarbonate granules with the nano zinc oxide powder wrapped with the dispersing agent, and adding the mixture into an internal mixer for preparation and molding.
Experimental example 1
1. Measurement of light transmittance and haze: the products obtained in examples 1 to 4 and comparative examples 1 to 3 were measured according to GB/T2410-2008.
2. And (3) flexural modulus measurement: the products obtained in examples 1 to 4 and comparative examples 1 to 3 were measured according to the GB/T9341-2008 standard, at a speed of 2mm/min, a span of 64mm, a bar size: (80. + -. 2) mmX (10. + -. 0.2) mmX (4. + -. 0.2) mm.
The properties of the test samples are shown in the following table:
TABLE 1 results of Performance testing of the samples
| Sample (I) | Light transmittance (%) | Haze (%) | Flexural modulus (GPa) |
| Example one | 88.7 | 0.10 | 3.01 |
| Example two | 88.8 | 0.08 | 3.12 |
| EXAMPLE III | 89.5 | 0.09 | 3.10 |
| Example four | 89.2 | 0.10 | 3.07 |
| Comparative example 1 | 89.0 | 0.13 | 2.74 |
| Comparative example No. two | 89.0 | 0.12 | 2.64 |
| Comparative example No. three | 86.8 | 0.11 | 2.68 |
From the data in the table, it can be known that the photodiffusion polycarbonate prepared by the invention, the zinc oxide nano powder and the high polymer material are blended to obtain the optical resin material with good transparency and haze. The zinc oxide nano powder has higher hardness compared with the high polymer material, so the prepared high polymer nano zinc oxide composite material has higher hardness and can change the friction performance of the high polymer material. Is a good light diffusion material and has wide application prospect.
Of course, other ratios of the raw material components, conditions and parameters in the production process, and the like are also possible except for those exemplified in the examples.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A preparation method of high-end photodiffusion polycarbonate is characterized by comprising the following steps:
the preparation method comprises the following steps:
a. dissolving stearic acid with a prescription amount in an organic solvent to prepare a feed liquid 1;
b. dissolving a prescription amount of silane coupling agent in an organic solvent to prepare a feed liquid 2;
c. placing the nano zinc oxide powder in the cavity of a fluidized bed reactor according to the prescription amount, starting a vacuum pump, vacuumizing the fluidized bed reactor, introducing nitrogen from a gas injection port, controlling the introduction amount through a pressure gauge, and adjusting the gas flow to keep the nano zinc oxide powder in a suspended state;
d. starting a sample injection pump 2, sucking the feed liquid 2 into a liquid vaporizer, introducing the feed liquid into a fluidized bed reactor after vaporization treatment, starting a sample injection pump 1 after spraying for a period of time, sucking the feed liquid 1 into the liquid vaporizer, and introducing the feed liquid into the fluidized bed reactor for spraying after vaporization treatment;
e. d, transferring the substance obtained in the step d into a drying device, and drying to obtain modified nano ZnO powder;
f. heating and melting polycarbonate to obtain a polycarbonate melt, adding the nano ZnO powder obtained in the step e into the polycarbonate melt, electrically stirring at a high speed to obtain a high-end photodiffusion polycarbonate melt, extruding, blending and granulating, and then mixing by using an open mill, an internal mixer or a screw mixer to prepare and mold;
wherein the mass ratio of the silane coupling agent to the nano ZnO is (0.6-0.8): 1, the mass ratio of stearic acid to the nano ZnO is (0.6-0.8): 1, and the mass ratio of the nano ZnO to the polycarbonate is 1: (8-10).
2. The method of claim 1, wherein the method comprises the steps of: the silane coupling agent in the step b is K550, K570 and K560.
3. The method of claim 1, wherein the method comprises the steps of: the solvent in the step a or the step b is any one of n-butyl alcohol, ethanol and toluene.
4. The method of claim 1, wherein the method comprises the steps of: the gas flow in the step c is 3.5-4.5L/min.
5. The method of claim 1, wherein the method comprises the steps of: in the step d, the feeding speed of the feeding liquid 2 is 1.6g/min to 2g/min, and the feeding speed of the feeding liquid 1 is 3g/min to 4 g/min.
6. The method of claim 1, wherein the method comprises the steps of: the high-speed electric stirring time is 1-3 h.
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