Tannin-modified porous material and methods of making same

Patent metadata

Field	Value
Publication number	US-2017166720-A1
Application number	US-201515316331-A
Country	US
Kind code	A1
Filing date	Jun 4, 2015
Priority date	Jun 5, 2014
Publication date	Jun 15, 2017
Grant date	—

Abstract

The present disclosure provides an aerogel formed of a tannin-containing porous material including a polymeric material, a tannin, and a clay. In some embodiments, the tannin-containing porous material is produced by forming an aerogel precursor including a polymeric material, a tannin, and a liquid dispersion medium; freezing the aerogel precursor; and freeze drying. In other embodiments, the tannin-containing porous material is produced by coating a formed porous aerogel material with a tannin-containing coating solution including tannin dispersed therein. The aerogel provides a flame retardant material having improved mechanical properties.

First claim

1 . A method of forming a tannin-modified porous material, comprising:
forming an aerogel precursor, the aerogel precursor comprising a polymeric material, a tannin, and a liquid dispersion medium; freezing the aerogel precursor to solidify the liquid dispersion medium; and freeze drying the aerogel precursor to sublime the dispersion medium and form the tannin-modified porous material.

2 . The method of claim 1 , wherein the polymeric material comprises an epoxy.

3 . The method of any of claim 1 , wherein the polymeric material comprises triethylenetetramine and 1,4-butanediol diglycidyl ether.

4 . (canceled)

5 . The method of claim 1 , wherein the aerogel precursor comprises montmorillonite clay.

6 . (canceled)

7 . (canceled)

8 . The method of claim 1 , wherein the tannin comprises tannic acid.

9 . (canceled)

10 . The method of claim 1 , further comprising coating the formed tannin-modified porous material with a tannin-containing coating solution comprising an additional tannin dispersed therein.

11 . The method of claim 10 , wherein the additional tannin comprises tannic acid.

12 . (canceled)

13 . The method of claim 10 , wherein the tannin-containing coating solution comprises tannic acid and ferric iron.

14 .- 18 . (canceled)

19 . A method of forming a tannin-modified porous material, comprising:
forming an aerogel precursor, the aerogel precursor comprising a polymeric material and a liquid dispersion medium; freezing the aerogel precursor to solidify the liquid dispersion medium; freeze drying the aerogel precursor to sublime the dispersion medium and form a porous material; and coating the formed porous material with a tannin-containing coating solution comprising a tannin dispersed therein.

20 . The method of claim 19 , wherein the tannin comprises tannic acid.

21 . (canceled)

22 . The method of claim 19 , wherein the coating solution comprises a tannic acid and ferric iron.

23 .- 26 . (canceled)

27 . The method of claim 19 , wherein the polymeric material comprises an epoxy.

28 . The method of claim 19 , wherein the polymeric material comprises triethylenetetramine and 1,4-butanediol diglycidyl ether.

29 . (canceled)

30 . The method of claim 19 , wherein the polymeric material comprises montmorillonite clay.

31 .- 33 . (canceled)

34 . An aerogel formed of a tannin-modified porous material, the porous material comprising:
polymeric material present in an amount from about 5 to about 95 parts per 100 parts by weight of the tannin-modified aerogel; and a tannin present in an amount from about 1 to about 20 parts per 100 parts by weight of the tannin-modified aerogel.

35 . The aerogel of claim 34 , wherein the polymeric material comprises triethylenetetramine and 1,4-butanediol diglycidyl ether.

36 . (canceled)

37 . The aerogel of claim 34 , wherein the tannin comprises tannic acid.

38 . The aerogel of claim 34 , wherein the tannin-modified aerogel comprises a coating layer comprising an additional tannin.

39 . The aerogel of claim 38 , wherein the coating layer further comprises ferric iron.

40 . (canceled)

41 . (canceled)

42 . The aerogel of claim 34 , wherein the porous material further comprises a clay present in an amount from about 1 to about 25 parts per 100 parts by weight of the tannin-modified aerogel.

Assignees

• Univ Case Western Reserve

Inventors

• Schiraldi David A
• Lang Xiaolong

Classifications

• C08J9/0066

  Use of inorganic compounding ingredients · CPC title

• C08J2379/02

  Polyamines · CPC title

• C08J2201/048

  Elimination of a frozen liquid phase · CPC title

• C08J2205/026

  Aerogel, i.e. a supercritically dried gel · CPC title

• C08J9/28 Primary

  by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum · CPC title