Temperature-responsive hygroscopic material and method for producing the same

Patent metadata

Field	Value
Publication number	US-2016144342-A1
Application number	US-201514943572-A
Country	US
Kind code	A1
Filing date	Nov 17, 2015
Priority date	Nov 21, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

Provided is a temperature-responsive hygroscopic material having a hygroscopic property that varies widely according to temperature variation and a method for producing the temperature-responsive hygroscopic material. The temperature-responsive hygroscopic material includes a mesoporous body having an average pore diameter of 2 nm to less than 50 nm and a temperature sensitive molecule chemically bonded with the mesoporous body inside a pore of the mesoporous body. The method includes a step of causing, in a solvent including an activator and a coupling agent, a coupling reaction of: a mesoporous body having an average diameter of 2 nm to less than 50 nm and having a functional group on a surface thereof; and a temperature sensitive molecule having a functional group which can undergo a coupling reaction with the functional group on the surface of the mesoporous body.

First claim

1 . A temperature-responsive hygroscopic material comprising:
a mesoporous body having an average pore diameter of 2 nm to less than 50 nm; and a temperature sensitive molecule chemically bonded with the mesoporous body inside a pore of the mesoporous body.

2 . The temperature-responsive hygroscopic material according to claim 1 , wherein the temperature sensitive molecule has a number average molecular weight of 2000 to 5000.

3 . The temperature-responsive hygroscopic material according to claim 1 , wherein an introduced amount of the temperature sensitive molecule is 5.2 mass % to 21.4 mass % based on a total mass of the temperature-responsive hygroscopic material.

4 . A method for producing a temperature-responsive hygroscopic material, comprising:
causing, in a solvent comprising an activator and a coupling agent, a coupling reaction between a mesoporous body having an average pore diameter of 2 nm to less than 50 nm and having a functional group on a surface inside the pore; and a temperature sensitive molecule having a functional group which can undergo a coupling reaction with the functional group on the surface of the mesoporous body.

5 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the temperature sensitive molecule has a number average molecular weight of 2000 to 5000.

6 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the functional group of the temperature sensitive molecule which can undergo a coupling reaction with the functional group on the surface of the mesoporous body is a functional group which the temperature sensitive molecule does not originally have and is preliminarily added to the temperature sensitive molecule.

7 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the functional group which can undergo a coupling reaction with the functional group on the surface of the mesoporous body is positioned at an end portion of the temperature sensitive molecule.

8 . The method for producing a temperature-responsive hygroscopic material according to claim 6 , wherein the functional group which can undergo a coupling reaction with the functional group on the surface of the mesoporous body is positioned at an end portion of the temperature sensitive molecule.

9 . The temperature-responsive hygroscopic material according to claim 1 , wherein a plurality of temperature sensitive molecules are chemically bonded inside the pore of the mesoporous body.

10 . The temperature-responsive hygroscopic material according to claim 9 , wherein the plurality of temperature sensitive molecules are substantially uniformly introduced along an axial direction of the pore of the mesoporous body.

11 . The temperature-responsive hygroscopic material according to claim 1 , wherein the mesoporous body has an average pore diameter of 2 to 30 nm.

12 . The temperature-responsive hygroscopic material according to claim 1 , wherein the temperature sensitive molecule is an oligomer.

13 . The temperature-responsive hygroscopic material according to claim 12 , wherein the oligomer is selected from the group consisting of N-isopropylacrylamide (NIPAM) oligomer, N-n-propylacrylamide (NNPAM) oligomer, N-cyclopropylacrylamide (NCPAM) oligomer and N,N-dimethylacrylamide (DEAM) oligomer.

14 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the activator is selected from the group consisting of N-hydroxysuccinimide (NHS), 1-hydroxybenzotriazole (HOBt), 1-hydroxy-7-azabenzotriazole (HOAt) and pentafluorophenol.

15 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the coupling agent is selected from the group consisting of 1-ethyl-3-(3-dimathylaminopropyl)carbodiimide hydrochloride, N,N′-dicyclohexylcarbodiimide (DCC) and N,N′-diisopropylcarbodiimide (DIC).

16 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the functional group on a surface inside the pore of the mesoporous body is selected from the group consisting of amino group, carboxyl group, hydroxyl group, epoxy group, vinyl group, isocyanate group, thiol group, sulfide group, ureido group, acryloxy group and methacryloxy group.

17 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the temperature sensitive molecule is an oligomer.

18 . The method for producing a temperature-responsive hygroscopic material according to claim 18 , wherein the oligomer is selected from the group consisting of N-isopropylacrylamide (NIPAM) oligomer, N-n-propylacrylamide (NNPAM) oligomer, N-cyclopropylacrylamide (NCPAM) oligomer and N,N-dimethylacrylamide (DEAM) oligomer.

19 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the functional group of the temperature sensitive molecule is selected from the group consisting of carboxyl group, isocyanate group, epoxy group, vinyl group, carbonyl group and hydroxyl group.

20 . The method for producing a temperature-responsive hygroscopic material according to claim 4 , wherein the mesoporous body has an average pore diameter of 2 to 30 nm.

Assignees

• Toyota Motor Co Ltd

Inventors

• Watanabe Masaki
• Ishikiriyama Mamoru

Classifications

• B01J20/3291

  Characterised by the shape of the carrier, the coating or the obtained coated product · CPC title

• B01J20/3272

  Polymers obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds · CPC title

• B01J20/3219

  involving a particular spacer or linking group, e.g. for attaching an active group · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title

• B01J20/28011

  Other properties, e.g. density, crush strength · CPC title