Photo-induced phase change cellulose material and preparation method thereof

A phase change, cellulose technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problem of using, cellulose lacks the structural basis of photoinduced phase change, and cannot be used as a photoinduced phase change energy material and other problems, to achieve the effect of low cost and simple preparation process

Active Publication Date: 2022-01-28
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, natural cellulose lacks the structural basis for photoinduced p...

Method used

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  • Photo-induced phase change cellulose material and preparation method thereof
  • Photo-induced phase change cellulose material and preparation method thereof
  • Photo-induced phase change cellulose material and preparation method thereof

Examples

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Embodiment 1

[0029] Add 102 μL of 51.6 μM sodium carboxymethylcellulose (500 glycosyl units) aqueous solution and 200 μL of 13.2 mM bromide N,N-dimethyl-N-(4-(4-((4- N-octyloxyphenyl)diazenyl)phenoxy)n-butyl)-2,5,8,11-tetraoxatridecane-13-ammonium aqueous solution was mixed in a centrifuge tube and shaken for 5 minutes, Then put the mixed solution in a centrifuge, centrifuge for 10 minutes at a relative centrifugal force of 6124g, discard the supernatant, and freeze-dry the resulting precipitate for 10 hours to obtain the photoinduced phase change cellulose material of the present invention. .

[0030] The differential scanning calorimetry test chart of the prepared cellulose material before being irradiated by ultraviolet light is as follows: figure 1 shown, according to figure 1 , draw: the low-temperature thermal energy storage density of the cellulose material of the present invention is 185.0J / g.

[0031] The prepared cellulose material, under ultraviolet light (365nm, 32mW / cm 2 )...

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Abstract

The invention relates to the technical field of biological materials, and mainly relates to a photo-induced phase change cellulose material and a preparation method thereof. According to the preparation method, sodium carboxymethylcellulose and a quaternary ammonium salt compound containing azobenzene groups are combined in a water phase through electrostatic acting force to obtain a compound, and the compound is subjected to centrifugation and freeze drying treatment to obtain the photoinduced phase change type cellulose material. The prepared photo-induced phase change type cellulose material can realize storage and release of energy through cis-trans isomerization of azobenzene and phase change of the material under irradiation of ultraviolet light and visible light. The prepared photo-induced phase change cellulose material can be applied to the related fields of energy storage and the like.

Description

technical field [0001] The invention relates to the technical field of biological materials, and mainly relates to a photoinduced phase change cellulose material and a preparation method thereof. Background technique [0002] Azobenzene has two isomers, cis and trans, and the two isomers can achieve reversible isomerization transformation under the stimulation of ultraviolet light and visible light. Organic functional materials containing azobenzene groups, if the photoisomerization of azobenzene can be used to realize the photoinduced phase transition at room temperature and near room temperature, the conversion of light energy to heat energy and low temperature can be realized. Storage and release of thermal energy. [0003] The energy conversion and storage process of the photoinduced phase change material containing azophenyl group is as follows: under the irradiation of ultraviolet light, the planar trans-azophenyl group will absorb light energy and isomerize into a no...

Claims

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Application Information

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IPC IPC(8): C09K5/06C08K5/23C08L1/28
CPCC09K5/063C08K5/23C08L1/286Y02P20/55
Inventor 吴中涛赵静张蕾
Owner QINGDAO UNIV OF SCI & TECH
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