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1. WO2020220138 - COPOLYMER-SILICA HYBRID AEROGELS AND METHODS FOR THE PREPARATION THEREOF

Publication Number WO/2020/220138
Publication Date 05.11.2020
International Application No. PCT/CA2020/050581
International Filing Date 01.05.2020
IPC
C08L 51/10 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
51Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
10grafted on to inorganic materials
C08J 3/09 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
3Processes of treating or compounding macromolecular substances
02Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
09in organic liquids
C08J 9/28 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
9Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
28by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
Applicants
  • NATIONAL RESEARCH COUNCIL OF CANADA [CA]/[CA]
Inventors
  • LU, Jianping
  • ZHANG, Zhiyi
  • TAO, Ye
Agents
  • BERESKIN & PARR LLP/S.E.N.C.R.L., S.R.L.
Priority Data
62/841,89702.05.2019US
63/010,86516.04.2020US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COPOLYMER-SILICA HYBRID AEROGELS AND METHODS FOR THE PREPARATION THEREOF
(FR) AÉROGELS HYBRIDES DE COPOLYMÈRE-SILICE ET PROCÉDÉS POUR LEUR PRÉPARATION
Abstract
(EN)
The present application relates to copolymer-silica hybrid aerogels as well as methods for the preparation thereof. The methods comprise hydrolyzing a silica precursor in an organic solvent to obtain a partially polymerized silica wet gel, reacting the partially polymerized silica wet gel with a copolymer of Formula (II) to obtain a copolymer-silica hybrid wet gel, reacting the copolymer-silica hybrid wet gel with a surface passivation agent and removing solvent from the copolymer-silica hybrid wet gel to obtain the copolymer-silica hybrid aerogel. The mechanical properties of the copolymer-silica hybrid aerogels can be further improved by blending cellulose nanofibrils into the hybrid aerogels. (II)
(FR)
La présente invention concerne des aérogels hybrides de copolymère-silice ainsi que des procédés pour leur préparation. Les procédés comprennent l'hydrolyse d'un précurseur de silice dans un solvant organique pour obtenir un gel humide de silice partiellement polymérisée, la réaction du gel humide de silice partiellement polymérisée avec un copolymère de Formule (II) pour obtenir un gel humide hybride de copolymère-silice, la réaction du gel humide hybride de copolymère-silice avec un agent de passivation de surface et l'élimination du solvant à partir du gel humide hybride de copolymère-silice pour obtenir l'aérogel hybride de copolymère-silice. Les propriétés mécaniques des aérogels hybrides de copolymère-silice peuvent être encore améliorées par incorporation par mélange de nanofibrilles de cellulose dans les aérogels hybrides. (II)
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