Preparation and property of cellulose-based porous skeletal/palmitic acid shape-stable PCM

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  • 1. College of Materials and Metallurgy,Guizhou University,Guiyang 550025;
    2. Guizhou Province Engineering Laboratory for Rubber Composites,Guiyang 550025

Received date: 2021-05-17

  Revised date: 2022-04-23

  Online published: 2022-08-29

Abstract

Solving the problems of low thermal conductivity of organic phase change material(PCM)and the easy leakage of liquid phase in the process of phase change are the keys to promote their wide application.A new thermal conductivity porous skeleton was prepared by the method of epichlorohydrin (ECH) chemical crosslinking microcrystalline cellulose (MCC) and oxidized multi-walled carbon nanotubes (O-MWCNTs) water-based blend,and then vacuum impregnation was used to adsorb palmitic acid (PA) into the skeleton to realize the encapsulation of PA and enhance its thermal conductivity at the same time.Even when pressed at a temperature higher than PA melting point,the PCM can still maintain their original shape without obvious leakage,showing excellent encapsulation and shape stability.When the content of O-MWCNTs was only 4.44%,the thermal conductivity of the PCM was 0.493W/(K·m),which was 128.2% higher than that of pure PA.At this time,the PCM can still maintain the melting latent heat of 157.3J/g,had higher energy storage density.

Cite this article

Gao Zhuan, Xiong Yuzhu, Wu Jiangbing, Li Yihang . Preparation and property of cellulose-based porous skeletal/palmitic acid shape-stable PCM[J]. New Chemical Materials, 2022 , 50(8) : 135 -140 . DOI: 10.19817/j.cnki.issn1006-3536.2022.08.026

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