Title: Method to produce colorless, high porosity, transparent polymer aerogels

Abstract

A method to produce a polymer gel includes dissolving precursors in a solvent to form a precursor solution, the precursors including polymer precursors, a stable free radical, one or more initiating radicals, and one or more stable free radical control agents, and heating the precursor solution to a temperature of polymerization to produce a cross-linked gel. A dried polymer aerogel has a Brunauer-Emmett Teller (BET) surface area over 100 m2/g, porosity of greater than 10%, visible transparency greater than 20%, color rendering index of over 20%, and average pore size of less than 100 nm.

Inventors:

Chintapalli, Mahati; Keoshkerian, Barkev; Ho, Alec; Iftime, Gabriel; Van Overmeere, Quentin; Bulger, Eli

Issue Date:

2020-11-17

Research Org.:

Palo Alto Research Center Inc., Palo Alto, CA (United States); Xerox Corp., Norwalk, CT (United States)

Sponsoring Org.:

USDOE Advanced Research Projects Agency - Energy (ARPA-E)

OSTI Identifier:

1771633

Patent Number(s):

10836855

Application Number:

16/046,692

Assignee:

Palo Alto Research Center Incorporated (Palo Alto, CA); Xerox Corporation (Norwalk, CT)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J13/0065 - {containing an organic phase}
B01J13/0091 - {Preparation of aerogels, e.g. xerogels}

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

C08F2/38 - Polymerisation using regulators, e.g. chain terminating agents {, e.g. telomerisation}
C08F2438/01 - Atom Transfer Radical Polymerization [ATRP] or reverse ATRP
C08F2438/02 - Stable Free Radical Polymerisation [SFRP]
C08F293/005 - {using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent}

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP

C08J2201/0542 - from an organic solvent-based polymer composition
C08J2205/026 - Aerogel, i.e. a supercritically dried gel
C08J3/24 - Crosslinking, e.g. vulcanising, of macromolecules
C08J9/286 - {the liquid phase being a solvent for the monomers but not for the resulting macromolecular composition, i.e. macroporous or macroreticular polymers}

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DOE Contract Number:  

AR0000734

Resource Type:

Patent

Resource Relation:

Patent File Date: 07/26/2018

Country of Publication:

United States

Language:

English