二氧化硅包覆芒硝基相变储能微胶囊制备及性能表征

王洋; 铁生年; 代鑫; 郝保康

人工晶体学报, 2020, 49 (10): 1924, 网络出版: 2021-01-09

二氧化硅包覆芒硝基相变储能微胶囊制备及性能表征

Preparation and Characterization of Silica Coated Glauber’s Salt-Based Microencapsulated Phase Change Materials

论文大纲

王洋 ¹铁生年 ¹代鑫 ²郝保康 ²

作者单位

¹ 青海大学,新能源光伏产业研究中心，西宁 810016

² 青海大学化工学院，西宁 810016

摘要

将四乙氧基硅烷(TEOS)和3-氨丙基三乙氧基硅烷(APTES)作为硅源，芒硝基相变储能微胶囊作为芯材，通过乳液聚合的方法制备了二氧化硅包覆的芒硝基相变储能微胶囊。测得芒硝基相变储能微胶囊的熔化焓和凝固焓分别为136.4 J/g和76.9 J/g，融化和凝固温度分别为23.6 ℃和17.6 ℃。微胶囊的核-壳结构减轻了无机水合盐固液分离程度，抑制了相分层现象的发生。在100次循环后，熔化焓为64.3 J/g，具有较好的循环稳定性，可用于热能存储等领域。

Abstract

Silica coated Glauber’s salt-based microcapsuled phase change materials were prepared by emulsion polymerization, using Tetraethoxysilane (TEOS) and 3-aminopropyltriethoxysilane (APTES) as the silicon source, Glauber’s salt-based microcapsuled phase change materials as core materials. The melting and solidifying enthalpy of the microcapsules are measured as 136.4 J/g and 76.9 J/g, respectively, with associated temperatures of 23.6 ℃ and 17.6 ℃. The core-shell structure of the microcapsules reduces the degree of solid-liquid separation of inorganic hydrated salts and suppresses the occurrence of phase stratification. After 100 cycles, the enthalpy of melting is 64.3 J/g, which has good cycle stability and can be used in fields such as thermal energy storage.

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王洋, 铁生年, 代鑫, 郝保康. 二氧化硅包覆芒硝基相变储能微胶囊制备及性能表征[J]. 人工晶体学报, 2020, 49(10): 1924. WANG Yang, TIE Shengnian, DAI Xin, HAO Baokang. Preparation and Characterization of Silica Coated Glauber’s Salt-Based Microencapsulated Phase Change Materials[J]. Journal of Synthetic Crystals, 2020, 49(10): 1924.

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