Hygroscopic material
View Patent ↗An excellent hygroscopic material containing a temperature responsive polymer, which can efficiently conduct heat, and hence has water release properties of absorbed water is realized. The hygroscopic material containing a polymer gel containing a temperature responsive polymer whose affinity with water reversibly changes in response to temperature stimulation and a thermally conductive filler is used.
1. A hygroscopic material comprising:
a polymer gel containing a temperature responsive polymer whose affinity with water reversibly changes in response to temperature stimulation; and
a thermally conductive filler,
wherein a content of the thermally conductive filler is 0.1% by weight to 30% by weight with respect to the hygroscopic material.
2. A hygroscopic material comprising:
a polymer gel containing a temperature responsive polymer whose affinity with water reversibly changes in response to temperature stimulation; and
a thermally conductive filler,
wherein the thermally conductive filler is oriented in a direction perpendicular to a surface of the hygroscopic material that receives heat from a heat source.
3. The hygroscopic material according to claim 1 ,
wherein the thermally conductive filler is oriented in a direction perpendicular to a surface of the hygroscopic material that receives heat from a heat source.
4. The hygroscopic material according to claim 1 ,
wherein the thermally conductive filler is at least one thermally conductive filler selected from a group consisting of a carbonaceous material, a metal particle, a metal oxide, a metal hydroxide, a nitrogen compound, a carbon compound, ceramics, and cellulose.
5. The hygroscopic material according to claim 1 ,
wherein the polymer gel is any one of the following (a) to (d):
(a) a mixture of the temperature responsive polymer with a hydrophilic polymer;
(b) a copolymer of the temperature responsive polymer and the hydrophilic polymer;
(c) an interpenetrating polymer network structure body of the temperature responsive polymer and the hydrophilic polymer; and
(d) a semi-interpenetrating polymer network structure body of the temperature responsive polymer and the hydrophilic polymer.