聚乙烯醇基相变储能材料的制备与表征  

Preparation and Characterization of Polyvinyl Alcohol-Based Phase Change Materials for Energy Storage

作　　者：周洋 申志浩 刘长春 代本才[1] ZHOU Yang;SHEN Zhi-hao;LIU Chang-chun;DAI Ben-cai(Institute of Chemistry,Henan Academy of Sciences,Zhengzhou 450002,China)

机构地区：[1]河南省科学院化学研究所,河南郑州450002

出　　处：《塑料科技》2022年第7期53-57,共5页Plastics Science and Technology

基　　金：河南省科学院杰青人才培养项目(210403024)。

摘　　要：相变储能材料能够解决能量储存和释放在时间和空间上的矛盾,被广泛应用于储热技术。以聚乙烯醇(PVA)和聚乙二醇单甲醚(mPEG)为原料,制备PVA/mPEG接枝聚合物和PVA+mPEG共混聚合物,并讨论不同相变剂mPEG分子量及添加量对PVA/mPEG接枝聚合物的化学结构及相变储能的影响。利用差示扫描量热仪(DSC)对PVA/mPEG接枝聚合物和PVA+mPEG共混聚合物进行表征。结果表明:随着mPEG含量的增加,PVA/mPEG接枝聚合物的相变焓和相变温度升高。随着mPEG分子量的增加,PVA/mPEG接枝聚合物的熔点和相变焓显著提高。PVA/mPEG接枝聚合物的稳定性优于PVA+mPEG共混聚合物。结合相变材料的力学性能,当mPEG的添加量为PVA的3%、mPEG分子量为1 000时,制备的PVA/mPEG接枝聚合物的性能较优异。Phase change energy storage materials can solve the contradiction between energy storage and release in time and space, and are widely used in heat storage technology. PVA/mPEG graft polymer and PVA+mPEG blend polymer were prepared using polyvinyl alcohol(PVA) and polyethylene glycol monomethyl ether(mPEG) as raw materials. The effects of molecular weight and addition amount of mPEG on the chemical structure and phase change energy storage of PVA/mPEG graft polymer were discussed. PVA/mPEG graft polymer and PVA+mPEG blend polymer were characterized by differential scanning calorimetry(DSC). The results show that with the increasing of mPEG content, the phase transition enthalpy and phase transition temperature of PVA/mPEG graft polymer are increased. With the increasing of molecular weight of mPEG, the melting point and phase transition enthalpy of PVA/mPEG graft polymer are increased significantly. The stability of PVA/mPEG graft polymer is better than that of PVA+mPEG blend polymer. Combined with the mechanical properties of phase change materials, when the addition of mPEG is 3% of PVA and the molecular weight of mPEG is 1 000, the prepared PVA-based phase change materials have excellent properties.

关 键 词：聚乙烯醇 聚乙二醇单甲醚 相变储能材料 

分 类 号：TB332[一般工业技术—材料科学与工程]