Nanoencapsulation of Organic Phase Change Material in Water via Coacervation Using Amphoteric Copolymer,Industrial & Engineering Chemistry Research

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Nanoencapsulation of Organic Phase Change Material in Water via Coacervation Using Amphoteric Copolymer
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-09-10 , DOI: 10.1021/acs.iecr.9b02507
Suqing Tan ₁ , Albert P. C. Chan ₂ , Pei Li ₁

Affiliation

Nanoencapsulation of phase change materials are receiving increasing attention because of enhanced thermal conductivity and thermal capacity as well as ease of incorporation into the matrix for a wide range of applications. In this work, we have developed a simple and efficient approach to fabricate nanoencapsulated organic phase change (NEPCM) particles in water via coacervation using an amphoteric and temperature-sensitive polymer. The chitosan-co-poly(methacrylic acid) (CTS-co-PMAA) copolymer plays dual functions as an emulsion stabilizer and a shell material. The fabrication steps involve emulsion formation, followed by coacervation to form particle shell through adjusting solution pH, and finally rigidization of the shell via glutaraldehyde cross-linking. This method achieves high encapsulation efficiency (up to 84%) with a PCM content of 66%, high thermal capacity (LH_s 165 J g^–1 and LH_m 169 J g^–1), and high thermal cycling stability over 100 phase change cycles.

中文翻译：

通过两性共聚物的凝聚作用将有机相变材料纳米封装在水中

相变材料的纳米封装由于提高的导热性和热容量以及易于在广泛的应用中掺入基体中而受到越来越多的关注。在这项工作中，我们已经开发了一种简单有效的方法，可通过使用两性和温度敏感的聚合物进行凝聚来在水中制备纳米封装的有机相变（NEPCM）颗粒。壳聚糖-共-聚（甲基丙烯酸）（CTS - co-PMAA）共聚物起乳液稳定剂和壳材料的双重作用。制备步骤包括乳液形成，然后通过调节溶液pH凝聚以形成颗粒壳，最后通过戊二醛交联使壳硬化。此方法具有PCM含量为66％的高封装效率（高达84％），高热容量（LH _s 165 J g ^–1和LH _m 169 J g ^–1），以及在100相变时的高热循环稳定性周期。

更新日期：2019-09-10

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