CN101962469A - Method for preparing full-degradable lactic acid composite material from secondary fibers of waste newspaper - Google Patents
Method for preparing full-degradable lactic acid composite material from secondary fibers of waste newspaper Download PDFInfo
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- CN101962469A CN101962469A CN 201010293203 CN201010293203A CN101962469A CN 101962469 A CN101962469 A CN 101962469A CN 201010293203 CN201010293203 CN 201010293203 CN 201010293203 A CN201010293203 A CN 201010293203A CN 101962469 A CN101962469 A CN 101962469A
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Abstract
The invention discloses a method for preparing a full-degradable lactic acid composite material from secondary fibers of waste newspaper, which comprises the following steps of: extracting the secondary fibers from the waste newspaper; modifying the secondary fibers; and preparing the full-degradable lactic acid composite material from the modified secondary fibers. The material prepared by the method has good mechanical, thermal and weather-resistant properties, can be fully biodegradable after being abandoned, cannot pollute the ecological environment, and is a green composite material.
Description
Technical field
The present invention relates to a kind of vegetable fibre reinforced plastics composite material machining machine, be specifically related to utilize the old and useless newspaper recycled fiber to strengthen the fully-degradable polylactic acid composite material machining machine.
Background technology
Can produce a large amount of old and useless newspapers in the daily life, our living environment be polluted if reclaim improper meeting.The main component of newspaper is a vegetable fibre, has premium propertiess such as intensity, modulus height.Poly(lactic acid) is a kind of complete degradable plastic, excellent property, and good processability.Old and useless newspaper reclaimed after operations such as making beating, deinking and drying are handled the matrix material that the compound preparations of degradable plastics such as back and poly(lactic acid) can be used for fields such as automotive upholstery, electric appliance casing is the brand-new approach of higher-grade recycling old and useless newspaper.The matrix material of this method processing has biodegradability, and matrix material can be degraded to carbonic acid gas and water fully under composting conditions, can not cause any harm to ecotope.But,, make it have very strong water-absorbent and polarity owing to contain a lot of hydroxyl isopolarity groups on the old and useless newspaper recycled fiber.And poly(lactic acid) contains a large amount of ester bonds, and wetting ability is poor, shows as nonpolarly, causes old and useless newspaper recycled fiber and poly(lactic acid) plastic interface consistency poor, is heterogeneous system on the microcosmic, and there is interface very clearly in two-phase, and cohesive force is poor.When the matrix material that with old and useless newspaper recycled fiber and poly(lactic acid) is feedstock production is subjected to external stress, the stress that is subjected on the poly(lactic acid) plastics is difficult for being delivered on the old and useless newspaper recycled fiber, cause the defective between old and useless newspaper recycled fiber and poly(lactic acid) plastics to enlarge gradually, the old and useless newspaper recycled fiber easily detaches from matrix material, moisture absorption and matrix material is expanded, thus make the mechanical property of matrix material and size stability descend.Therefore, by the certain physics chemical method old and useless newspaper recycled fiber being carried out modification handles, with the old and useless newspaper regenerant fiber after the modification as strongthener, with the poly(lactic acid) is that matrix not only can be recycled old newspaper by certain high-fall matrix material of separating of moulding process development old and useless newspaper recycled fiber enhancing poly(lactic acid), reduce the cost of matrix material, but also can reduce environmental pollution, have great realistic meaning.
Summary of the invention
Technical problem solved by the invention is to provide a kind of method of utilizing the old and useless newspaper recycled fiber to make high-fall lactic acid composite material, to solve the shortcoming in the above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
Utilize the old and useless newspaper recycled fiber to make the method for high-fall lactic acid composite material, difference is with the notable feature of other technologies, at first from old and useless newspaper, extract recycled fiber, make high-fall lactic acid composite material utilizing the recycled fiber after the modification after the recycled fiber modification again.It mainly may further comprise the steps:
(1) old and useless newspaper is put in the tap water soak 8h after, send into the processing of pulling an oar in the machine,massing, then, squeeze most of moisture, obtain reclaiming wet fiber, wet fiber being added concentration is after carrying out deinking processing 30min in the 1%NaOH aqueous solution, to filter, clean to neutral again, again wet fiber is passed through the pneumatic drier drying;
(2) add diphenylmethanediisocyanate (to call MDI in the following text) solution to dried recycled fiber and carry out modification and handle 30min and make modified fibre, then, modified fibre being sent into vacuum drying oven, to be dried to water ratio under 70 ℃ of temperature be about 5% again;
(3) utilize dried modified fibre to make high-fall lactic acid composite material.
Another of difference of the present invention and traditional technology is characterised in that, utilizes dried modified fibre to make may further comprise the steps of high-fall lactic acid composite material in the above-mentioned steps (3):
(a) poly(lactic acid) is sent into baking oven behind dry 8h under 70 ℃ of temperature, send into the recycled fiber mixing 10min under 150 ℃ of temperature after twin-screw extruder and the modification, make flaky mixture, treat to send into the granulation of strong plastic crusher in crushing after the flaky mixture cooling, make particulate mixtures;
(b) particulate mixtures is sent into injection moulding machine injection molding, or sent into vulcanizing press and carry out forming materials.
Among the present invention, wet fiber is 5% by the dried optimum moisture content of pneumatic drier in the described step (1).
Among the present invention, the MDI consumption is 1% of a bone dry fiber in the described step (2).
Among the present invention, injection molding processing parameter is in the described step (b): 170 ℃ of cylindrical shell nozzle temperatures, 170 ℃ of one section temperature, 180 ℃ of two sections temperature, injection pressure 30～40Mpa.
Among the present invention, the processing parameter of forming materials is in the described step (b): 150 ℃ of mold temperatures, pressure 3～4Mpa, time 10min.
Beneficial effect: utilizing the material of the method for the invention preparation to have good mechanical, calorifics and weather resistance, can realize fully bio-degradable after discarding, can not pollute ecotope, is a kind of green matrix material.
Description of drawings
Fig. 1 is a schema of the present invention
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1 is schema of the present invention.
Embodiment 1
1, old and useless newspaper is put in the tap water and sends into the processing of pulling an oar in the machine,massing after soaking 8h, then, squeeze most of moisture, obtain reclaiming wet fiber.Wet fiber being added concentration is after carrying out deinking processing 30min in the 1%NaOH aqueous solution, to filter, clean to neutral again, and again wet fiber being dried to water ratio by pneumatic drier is about 5%.
2, add MDI solution to dried recycled fiber and carry out modification and handle 30min and make modified fibre, the MDI consumption be 1% of a dry recycled fiber afterwards, and then, modified fibre being sent into vacuum drying oven, to be dried to water ratio under 70 ℃ of temperature be about 5% again.
3, poly(lactic acid) is sent into baking oven and behind dry 8h under 70 ℃ of temperature, sent into twin-screw extruder and the mixing 10min of dried modified fibre (poly(lactic acid) is 50: 50 with the fiber quality ratio), make flaky mixture, melting temperature is 150 ℃, treat to send into the granulation of strong plastic crusher in crushing after the flaky mixture cooling, make particulate mixtures.
4, particulate mixtures is sent into vulcanizing press and carried out forming materials, be processed into our needed breadth and shape.Mold temperature is 150 ℃, pressure 3Mpa, time 10min.
Embodiment 2
1, old and useless newspaper is put in the tap water and sends into the processing of pulling an oar in the machine,massing after soaking 8h, then, squeeze most of moisture, obtain reclaiming wet fiber.Wet fiber being added concentration is after carrying out deinking processing 30min in the 1%NaOH aqueous solution, to filter, clean to neutral again, and again wet fiber being dried to water ratio by pneumatic drier is about 5%.
2, carry out modification processing 30min to dried recycled fiber adding MDI solution and make modified fibre, the MDI consumption is 1% of a dry back recycled fiber.Then, modified fibre being sent into vacuum drying oven, to be dried to water ratio under 70 ℃ of temperature be about 5% again.
3, poly(lactic acid) is sent into baking oven and behind dry 8h under 70 ℃ of temperature, sent into twin-screw extruder and the mixing 10min of dried modified fibre (poly(lactic acid) is 60: 40 with the fiber quality ratio), make flaky mixture, melting temperature is 150 ℃, treat to send into the granulation of strong plastic crusher in crushing after the flaky mixture cooling, make particulate mixtures.
4, particulate mixtures is sent into vulcanizing press and carried out forming materials, be processed into our needed breadth and shape.Mold temperature is 150 ℃, pressure 4Mpa, time 10min.
Embodiment 1,2 is mainly used to prepare the bigger matrix material of breadth.
Embodiment 3
1, old and useless newspaper is put in the tap water and sends into the processing of pulling an oar in the machine,massing after soaking 8h, then, squeeze most of moisture, obtain reclaiming wet fiber.Wet fiber being added concentration is after carrying out deinking processing 30min in the 1%NaOH aqueous solution, to filter, clean to neutral again, and again wet fiber being dried to water ratio by pneumatic drier is about 5%.
2, carry out modification processing 30min to dried recycled fiber adding MDI solution and make modified fibre, the MDI consumption is 1% of a dry back recycled fiber fiber.Then, modified fibre being sent into vacuum drying oven, to be dried to water ratio under 70 ℃ of temperature be about 5% again.
3, poly(lactic acid) is sent into baking oven and sent into twin-screw extruder and the mixing 10min of dried modified fibre (poly(lactic acid) is 60: 40 with the fiber quality ratio) behind dry 8h under 70 ℃ of temperature, make flaky mixture, melting temperature is 150 ℃.Treat to send into the granulation of strong plastic crusher in crushing after the flaky mixture cooling, make particulate mixtures.
4, particulate mixtures is sent into injection moulding machine and carried out forming materials, be processed into our needed breadth and shape.Injection molding main technologic parameters: 170 ℃ of cylindrical shell nozzle temperatures, 170 ℃ of one section temperature, 180 ℃ of two sections temperature, injection pressure 40MPa.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. utilize the old and useless newspaper recycled fiber and make the method for high-fall lactic acid composite material, it is characterized in that, may further comprise the steps:
(1) old and useless newspaper is put in the tap water soak 8h after, send into the processing of pulling an oar in the machine,massing, then, squeeze most of moisture, obtain reclaiming wet fiber, wet fiber being added concentration is after carrying out deinking processing 30min in the 1%NaOH aqueous solution, to filter, clean to neutral again, again wet fiber is passed through the pneumatic drier drying;
(2) add diphenylmethanediisocyanate solution to dried recycled fiber and carry out modification and handle 30min and make modified fibre, then, modified fibre being sent into vacuum drying oven, to be dried to water ratio under 70 ℃ of temperature be about 5% again;
(3) utilize dried modified fibre to make high-fall lactic acid composite material.
2. the method for utilizing the old and useless newspaper recycled fiber and making high-fall lactic acid composite material according to claim 1 is characterized in that, utilizes dried modified fibre to make may further comprise the steps of high-fall lactic acid composite material in the described step (3):
(a) poly(lactic acid) is sent into baking oven behind dry 8h under 70 ℃ of temperature, send into the recycled fiber mixing 10min under 150 ℃ of temperature after twin-screw extruder and the modification, make flaky mixture, treat to send into the granulation of strong plastic crusher in crushing after the flaky mixture cooling, make particulate mixtures;
(b) particulate mixtures is sent into injection moulding machine injection molding, or sent into vulcanizing press and carry out forming materials.
3. the method for utilizing the old and useless newspaper recycled fiber and making high-fall lactic acid composite material according to claim 1 is characterized in that, wet fiber is 5% by the dried optimum moisture content of pneumatic drier in the described step (1).
4. the method for utilizing the old and useless newspaper recycled fiber and making high-fall lactic acid composite material according to claim 1 is characterized in that, the diphenylmethanediisocyanate consumption is 1% of a bone dry fiber in the described step (2).
5. the method for utilizing the old and useless newspaper recycled fiber and making high-fall lactic acid composite material according to claim 2, it is characterized in that, injection molding processing parameter is in the described step (b): 170 ℃ of cylindrical shell nozzle temperatures, 170 ℃ of one section temperature, 180 ℃ of two sections temperature, injection pressure 30～40Mpa.
6. the method for utilizing the old and useless newspaper recycled fiber and making high-fall lactic acid composite material according to claim 2 is characterized in that, the processing parameter of forming materials is in the described step (b): 150 ℃ of mold temperatures, pressure 3～4Mpa, time 10min.
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| CN 201010293203 CN101962469A (en) | 2010-09-27 | 2010-09-27 | Method for preparing full-degradable lactic acid composite material from secondary fibers of waste newspaper |
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| CN 201010293203 CN101962469A (en) | 2010-09-27 | 2010-09-27 | Method for preparing full-degradable lactic acid composite material from secondary fibers of waste newspaper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104292785A (en) * | 2014-10-29 | 2015-01-21 | 正业包装（中山）有限公司 | Recycled paper fiber-polylactic acid composite material and preparation method thereof. |
| CN104356672A (en) * | 2014-10-29 | 2015-02-18 | 正业包装（中山）有限公司 | Recycled paperboard fiber composite material with elasticity and barrier property and preparation method of recycled paperboard fiber composite material |
| CN109183206A (en) * | 2018-08-18 | 2019-01-11 | 建昌县中昌再生资源回收有限责任公司 | A method of greenhouse rear wall plate is produced using automotive interior material leftover pieces |
| CN110294921A (en) * | 2018-03-22 | 2019-10-01 | 苏州爱绿纸塑有限公司 | A kind of high-strength environment-friendly paper packaging material and preparation method thereof |
| CN113136095A (en) * | 2021-03-04 | 2021-07-20 | 西安理工大学 | Preparation method of waste paper fiber/nano-cellulose reinforced polylactic acid-based composite material |
| CN113354845A (en) * | 2021-05-17 | 2021-09-07 | 西安理工大学 | Preparation method of waste paper fiber reinforced polylactic acid composite material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101314668A (en) * | 2007-06-01 | 2008-12-03 | 东丽纤维研究所（中国）有限公司 | Polylactic acid and modified cellulose blend, preparation method and heat-proof macromolecule material |
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2010
- 2010-09-27 CN CN 201010293203 patent/CN101962469A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101314668A (en) * | 2007-06-01 | 2008-12-03 | 东丽纤维研究所（中国）有限公司 | Polylactic acid and modified cellulose blend, preparation method and heat-proof macromolecule material |
Non-Patent Citations (3)
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| 《Composites, part A: applied science and manufacturing》 20060131 Seung-Hwan Lee et al. Biodegradable polymers/bamboo fiber biocomposite with bio-based coupling agent 第1节 1-6 第37卷, 第1期 2 * |
| 《Composites, part B:engineering》 20061103 M.S. Huda et al. The effect of silane treated- and untreated-talc on the mechanical and physico-mechanical properties of poly(lactic acid)/newspaper fibers/talc hybrid composites 2.1-2.2节,第1节第1段 1-6 第38卷, 第3期 2 * |
| 《河北化工》 19960630 许明远等 氢氧化钠在废纸脱墨中的应用研究 第2.1节 1-6 , 第2期 2 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104292785A (en) * | 2014-10-29 | 2015-01-21 | 正业包装（中山）有限公司 | Recycled paper fiber-polylactic acid composite material and preparation method thereof. |
| CN104356672A (en) * | 2014-10-29 | 2015-02-18 | 正业包装（中山）有限公司 | Recycled paperboard fiber composite material with elasticity and barrier property and preparation method of recycled paperboard fiber composite material |
| CN104292785B (en) * | 2014-10-29 | 2016-11-16 | 正业包装（中山）有限公司 | A kind of recovery paper fiber lactic acid composite material and preparation method thereof |
| CN110294921A (en) * | 2018-03-22 | 2019-10-01 | 苏州爱绿纸塑有限公司 | A kind of high-strength environment-friendly paper packaging material and preparation method thereof |
| CN109183206A (en) * | 2018-08-18 | 2019-01-11 | 建昌县中昌再生资源回收有限责任公司 | A method of greenhouse rear wall plate is produced using automotive interior material leftover pieces |
| CN113136095A (en) * | 2021-03-04 | 2021-07-20 | 西安理工大学 | Preparation method of waste paper fiber/nano-cellulose reinforced polylactic acid-based composite material |
| CN113354845A (en) * | 2021-05-17 | 2021-09-07 | 西安理工大学 | Preparation method of waste paper fiber reinforced polylactic acid composite material |
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Assignee: Langfang Huari Furniture Share Co., Ltd. Assignor: Li Xingong Contract record no.: 2011130000052 Denomination of invention: Method for preparing full-degradable lactic acid composite material from secondary fibers of waste newspaper License type: Exclusive License Open date: 20110202 Record date: 20110512 |
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Application publication date: 20110202 |