十二水磷酸氢二钠纳米复合相变材料的过冷特性

CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2018年第37卷第7期

·2734· 化工进

展

陈跃1，纪珺1，徐笑锋1，章学来1，李玉洋1，陈启杨1，刘升2

（1上海海事大学蓄冷技术研究所，上海 201306；2北京市农林科学院蔬菜研究中心，北京 100097）摘要：研制了一种以十二水磷酸氢二钠（Na 2HPO 4·12H 2O ）为主储能材料的中低温相变材料。通过添加成核剂纳米Al 2O 3、纳米TiO 2、纳米石墨粉、多壁碳纳米管和高分子分散剂聚丙烯酸钠（PAAS ）对Na 2HPO 4·12H 2O 改性。结果表明，多壁碳纳米管减少过冷度的同时会破坏Na 2HPO 4·12H 2O 的相变特性，添加3%（质量分数）的纳米Al 2O 3可以减少40.7%的过冷度，添加4%的纳米TiO 2可以减少44.6%的过冷度，添加4%的纳米石墨粉可以减少62.3%的过冷度。对于添加3%纳米Al 2O 3的复合相变材料，PAAS 浓度对过冷度无影响；对于4%纳米TiO 2的复合相变材料，添加4%PAAS 过冷度最低为3.2℃，减少了76.1%；对于4%纳米石墨粉的复合相变材料，2%PAAS 过冷度最低为1.2℃，减少了90.7%；纳米石墨粉/PAAS/Na 2HPO 4·12H 2O 三元复合相变材料经过100次循环实验后，发现具有较好的热稳定性。

关键词：复合材料；相变；纳米粒子；过冷；稳定性

中图分类号：TK02 文献标志码：A 文章编号：1000–6613（2018）07–2734–06

DOI ：10.16085/j.issn.1000-6613.2017-1691

Supercooling characteristics of disodium hydrogen phosphate

nano-composites phase change materials

CHEN Yue 1, JI Jun 1, XU Xiaofeng 1, ZHANG Xuelai 1, LI Yuyang 1, CHEN Qiyang 1, LIU Sheng 2 （1Institute of Cool Storage Technology ，Shanghai Maritime University,Shanghai 201306，China ；2Beijing V egetable

Research Center Beijing Academy of Agriculture and Forestry Sciences ，Beijing 100097，China ）

Abstract ：A low temperature phase change material with the disodium hydrogen phosphate (Na 2HPO 4·12H 2O) as the main energy storage material was developed. The property of the Na 2HPO 4·12H 2O was modified by adding nucleators, such as nano Al 2O 3, nano TiO 2, nano-graphite powder, multi-walled carbon nanotubes (MWCNTs), and the polymer dispersant polyacrylic acid sodium (PAAS) . The results showed that the adding of MWCNTs would reduce the super-cooling degree of the Na 2HPO 4·12H 2O while destroy its phase change characteristics. The super-cooling degree decreased by 40.7% after adding 3% (mass fraction) nano Al 2O 3，44.6% by adding 4% nano TiO 2，and decreased by 62.3% after adding 4% nano-graphite powder. Compared with 3% (mass fraction) nano Al 2O 3 composite phase change material ，the concentration of PAAS had no effect on the supercooling degree. Comepared with 4% nano TiO 2 composite phase change material ，the minimum supercooling degree was 3.2℃，which decreased by 76.1% by adding 4% PAAS. Comepared with 4% nano-graphite powder composite phase change material ，the minimum supercooling degree was 1.2℃，which decreased by 90.7% by adding 2% PAAS. It was found that the three elements composite phase change material had good thermal reliability by the cyclic experiments.

Key words ：composites ；phase change ；nanoparticles ；supercooling ；stability

通讯作者：章学来，教授，研究方向为相变储能技术及二元冰真空制备。E-mail ：xlzhang@https://www.360docs.net/doc/da13914811.html, 。

收稿日期：2017-08-10；修改稿日期：2017-09-10。

基金项目：上海市科委项目（16040501600）。

第一作者：陈跃（1993—），男，硕士研究生，研究方向为储能技术。

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