GN@cellulose based solid-solid phase change material and preparation method and application thereof

A phase change material, cellulose-based technology, applied in heat exchange materials, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problem of low thermal conductivity of cellulose polymer phase change materials and flexibility of graphene-based phase change materials It is not suitable for secondary processing and molding, and achieves the effects of narrow phase transition temperature range, excellent thermal cycle stability, structural controllability, and improved sensitivity
CN110698597AActive Publication Date: 2020-01-17TIANJIN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN POLYTECHNIC UNIV
Publication Date
2020-01-17

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Abstract

The invention discloses a GN@cellulose based solid-solid phase change material and a preparation method and application thereof. The method comprises the following steps of (1) dissolving cellulose; (2) carrying out homogeneous phase grafting modification: reacting a halogenated acyl halide monomer with cellulose to obtain cellulose ester; (3) carrying out ATRP method reaction: uniformly dispersing the cellulose ester, GN and a solvent B obtained in Step (2), and then adding a ligand, a catalyst and alkyl acrylate to react to obtain a reaction mixture; and (4) carrying out purification: purifying the reaction mixture obtained in Step (3) to obtain a GN@cellulose-g-polyalkylacrylate copolymer. The copolymer is subjected to melt extrusion spinning to obtain a solid-solid phase change fiber.The copolymer is is subjected to electrostatic spinning to obtain a film. According to the method, cellulose fibers are used as a substrate, halogen functional groups are grafted through an acylationreaction, alkyl acrylate is grafted on a cellulose skeleton through ATRP, graphene is used as a reinforcing material, and later-stage processing is not needed, so that the fibers with flexibility, high thermal conductivity and high enthalpy value are prepared, and secondary processing is facilitated.
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Description

technical field

[0001] The invention belongs to the technical field of phase change materials, in particular to a GN@cellulose-based solid-solid phase change material and its preparation method and application. Background technique

[0002] With the environmental problems caused by the consumption of resources, how to make good use of renewable and degradable resources and energy is one of the most effective ways to solve environmental and energy problems. Phase change energy storage material (PCM) is just a kind of functional material that can realize the effective recovery and utilization of heat energy.

[0003] A phase-change energy storage material is a substance that can change from one state to another at a certain temperature, and the molecules of the substance rapidly change from order to disorder (and vice versa), accompanied by absorption Thermal and exothermic phenomena. At present, liquid-solid phase change materials are the most commonly used, but the liquid ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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