Stojanovic et al., 2019 - Google Patents

Ambient pressure drying of silica aerogels after hydrophobization with mono-, di-and tri-functional silanes and mixtures thereof

Stojanovic et al., 2019

View PDF
Document ID
10656868841652619976
Author
Stojanovic A
Comesaña S
Rentsch D
Koebel M
Malfait W
Publication year
Publication venue
Microporous and Mesoporous Materials

External Links

Snippet

Aerogels are mesoporous materials with a rapidly growing thermal insulation market interest, partly because ambient pressure drying (APD) reduces cost. Silica gels must be hydrophobized to prevent condensation reactions and irreversible shrinkage during APD …
Continue reading at www.dora.lib4ri.ch (PDF) (other versions)

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/146—After-treatment of sols
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/157—After-treatment of gels
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B31/00—Carbon; Compounds thereof
    • C01B31/02—Preparation of carbon; Purification; After-treatment
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size

Similar Documents

Publication Publication Date Title
Stojanovic et al. Ambient pressure drying of silica aerogels after hydrophobization with mono-, di-and tri-functional silanes and mixtures thereof
Iswar et al. Effect of aging on silica aerogel properties
Wu et al. Preparation and surface modification mechanism of silica aerogels via ambient pressure drying
Vansant et al. Characterization and chemical modification of the silica surface
Obrey et al. Enhancing mechanical properties of silica aerogels
He et al. Flexible silica aerogel based on methyltrimethoxysilane with improved mechanical property
Çok et al. Hydrophobic silica aerogels synthesized in ambient conditions by preserving the pore structure via two-step silylation
Capel-Sanchez et al. Silylation and surface properties of chemically grafted hydrophobic silica
Fidalgo et al. Correlation between physical properties and structure of silica xerogels
Duan et al. Hydrophobic silica aerogels by silylation
Huang et al. Organic solvent-saving preparation of water glass based aerogel granules under ambient pressure drying
de Fátima Júlio et al. Superhydrophobic hybrid aerogel powders from waterglass with distinctive applications
Zhao et al. Phase transfer agents facilitate the production of superinsulating silica aerogel powders by simultaneous hydrophobization and solvent-and ion-exchange
KR20140142343A (en) Process for producing aerogels
Sarawade et al. Preparation of hydrophobic mesoporous silica powder with a high specific surface area by surface modification of a wet-gel slurry and spray-drying
Wang et al. Preparation of modified mesoporous MCM-41 silica spheres and its application in pervaporation
Ehgartner et al. Flexible organofunctional aerogels
Sánchez-Vicente et al. Chemical surface modification of mesoporous silica SBA-15 with a tertiary aminosilane using supercritical carbon dioxide
Liu et al. Influence of thermal process on microstructural and physical properties of ambient pressure dried hydrophobic silica aerogel monoliths
WO1999026880A1 (en) A method of producing silicon tetrachloride-based and organically modified aerogels
Pasqua et al. Hybrid MCM-41 grafted by a general microwave-assisted procedure: A characterization study
Fidalgo et al. Tailoring the structure and hydrophobic properties of amorphous silica by silylation
Labrosse et al. Characterization of porosity of ammonia catalysed alkoxysilane silica
Bernardes et al. Octadecyl-modified silicas obtained by non-hydrolytic condensation of a C18-hybrid silica sol on a silica surface
Pan et al. Microporous inorganic/organic hybrids via oxysilylation of a cubic symmetry nanobuilding block [(HMe2SiOSiO1. 5) 8] with RxSi (OEt) 4− x