US 2014/0350134 A1 · Method of Aerogel Synthesis

Abstract

The present disclosure provides a method for producing an aerogel, the method comprising reacting at least one acid monomer with at least one diamino monomer in a first solvent under conditions appropriate to form a polyimide polymer; conducting a solvent exchange wherein the first solvent is exchanged for a second solvent, said second solvent having a freezing point, wherein said solvent exchange further comprises (1) submersing the polyimide polymer in the second solvent in a pressure vessel and (2) creating a high pressure environment inside the pressure vessel for a first period of time; cooling the polyimide polymer to a first temperature below the freezing point of the second solvent; and subjecting cooled polyimide polymer to a first vacuum for a second period of time at a second temperature.

Claims27

Dependent claims

A method of producing an aerogel, the method comprising:

a. reacting at least one acid monomer with at least one diamino monomer in a first solvent under conditions appropriate to form a polyimide polymer;
b. conducting a solvent exchange wherein the first solvent is exchanged for a second solvent, said second solvent having an evaporation point, wherein said solvent exchange further comprises (i) submersing the polyimide polymer in the second solvent in a pressure vessel and (ii) creating a high pressure inside the pressure vessel for a first period of time;
c. cooling the polyimide polymer to a first temperature below the freezing point of the second solvent;
and
d. subjecting cooled polyimide polymer to a first vacuum for a second period of time at a second temperature.

2 more elements

A method of producing an aerogel, the method comprising:

a. reacting at least one acid monomer with at least one diamino monomer in a first solvent under conditions appropriate to form a polyimide polymer;
b. conducting a solvent exchange wherein the first solvent is exchanged for a second solvent, said second solvent having an evaporation point;
c. cooling the polyimide polymer to a first temperature below the freezing point of the second solvent;
and
d. subjecting cooled polyimide polymer to a first vacuum for a second period of time at a second temperature.

2 more elements

A polyimide polymer aerogel manufactured by a process comprising:

a. reacting at least one acid monomer with at least one diamino monomer in a first solvent to form the polyimide precursor polymer;
b. contacting the polyimide precursor polymer in the first solvent with a chemical dehydrating agent to form a polyimide gel by imidization;
c. conducting a solvent exchange wherein the first solvent is exchanged for a second solvent wherein said solvent exchange further comprises creating a high pressure inside a pressure vessel containing the polyimide polymer in the presence of the second solvent for a first period of time;
and
d. cooling the polyimide gel to a first temperature below a freezing point of the second solvent;
e. subjecting cooled polyimide gel to a vacuum for a second period of time at a second temperature.

3 more elements

Dependencies are inferred from the claim text.

Method of Aerogel Synthesis

Life of this patent

Method of Aerogel Synthesis

Life of this patent

Abstract

Claims27