单分散聚合物微球稳定Pickering乳液法制备大粒径微胶囊相变材料

doi:10.7503/cjcu20200235

高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (9): 2085.doi: 10.7503/cjcu20200235

单分散聚合物微球稳定Pickering乳液法制备大粒径微胶囊相变材料

李博鑫, 杨隽阁, 尹德忠(), 高成乾, 张秋禹

西北工业大学特种功能与智能高分子材料工业和信息化部重点实验室, 西安 710072

收稿日期:2020-04-26 出版日期:2020-09-10 发布日期:2020-09-02
通讯作者: 尹德忠 E-mail:dezh_yin@nwpu.edu.cn
基金资助:
国家重点研发计划项目(2016YFC0301302);中央高校基本科研业务项目(310201911fz051)

Preparation of Large-sized Microencapsulated Phase Change Materials Through Pickering Emulsion Stabilized by Monodisperse Polymer Microspheres

LI Boxin, YANG Junge, YIN Dezhong(), GAO Chengqian, ZHANG Qiuyu

Key Laboratory of Special Function and Intelligent Polymer Materials, Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an 710072, China

Received:2020-04-26 Online:2020-09-10 Published:2020-09-02
Contact: YIN Dezhong E-mail:dezh_yin@nwpu.edu.cn
Supported by:
Supported by the National Key Research and Development Program of China(2016YFC0301302);the Fundamental Research Funds for the Central Universities, China(310201911fz051)

摘要/Abstract

摘要：

采用二步加料的分散聚合法制备单分散聚甲基丙烯酸缩水甘油酯(PGMA)微球, 并使其水解, 得到水包油(O/W)型Pickering乳液稳定剂. 在Pickering乳液聚合过程中, 利用相分离机制, 形成了聚苯乙烯(PSt)和 PGMA复合为整体囊壳的微胶囊相变材料. 微胶囊平均粒径达76 μm, 囊芯含量高达83%, 相变焓达到174 J/g, 具有很高的储热容量.

关键词: 微胶囊相变材料, Pickering乳液, 聚合物微球, 分散聚合

Abstract:

Monodispersive poly(glycidyl methacrylate)(PGMA) microspheres were prepared by dispersive polymerization and then were hydrolyzed to obtain oil-in-water Pickering stablizer. Based on phase separation mechanism, microcapsulated phase change material(MePCM) with PSt and PGMA composite shell were prepared by Pickering emulsion polymerization. The MePCM was characterized by large diameter(76 μm averagely), high core content[w(dodecanol)=83%] and excellent energy storage capability(phase change enthalpy of 174 J/g).

Key words: Microencapsulated phase change material, Pickering emulsion, Polymer microsphere, Dispersion polymerization

中图分类号:

O633

TrendMD:

李博鑫, 杨隽阁, 尹德忠, 高成乾, 张秋禹. 单分散聚合物微球稳定Pickering乳液法制备大粒径微胶囊相变材料. 高等学校化学学报, 2020, 41(9): 2085.

LI Boxin, YANG Junge, YIN Dezhong, GAO Chengqian, ZHANG Qiuyu. Preparation of Large-sized Microencapsulated Phase Change Materials Through Pickering Emulsion Stabilized by Monodisperse Polymer Microspheres. Chem. J. Chinese Universities, 2020, 41(9): 2085.

图/表 9

Scheme 1 Fabrication process of MePCM from Pickering emulsion

Fig.1 Particlesize analysis chart(A, C) and SEM images(B, D) of PGMA microspheres prepared by different feeding methods(A, B) One-step feeding method; (C, D) two-step feeding method.

Fig.2 FTIR spectra of PGMA microspheres with different hydrolysis timeHydrolysis time/h: a. 0; b. 3; c. 10; d. 24.

Fig.3 Appearance(A) and optical micrograph(B), photos of pickering emulsion and a magnified micrograph of a droplet(C)

Fig.4 Optical micrograph(A), SEM image(B), shell SEM image(C) and size distribution(D) of MePCM

Fig.5 FTIR spectra of the components of MePCMa. Dodecanol; b. shell of microcapsule; c. MePCM.

Table 1 Properties of MePCM prepared by Pickering emulsion

Sample	V_monomer^a/mL	V_dodecanol/mL	Dimeter/μm	w_Core^b(%)	T_pm^c/℃	T_PC^d/℃	Enthopy/(J·g^-1)	w_Core^e(%)
M80	0.2	0.8	67	83	25.6	20.4	174	82.5
M70	0.3	0.7	72	72	25.5	20.2	154	73.1
M60	0.4	0.6	76	66	25.3	19.8	142	67.3

Fig.6 Typical TGA curves of dodecanol(a) and MePCM(b)

Fig.7 Typical DSC curves of dodecanol(A) and MePCM(B)

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单分散聚合物微球稳定Pickering乳液法制备大粒径微胶囊相变材料

Preparation of Large-sized Microencapsulated Phase Change Materials Through Pickering Emulsion Stabilized by Monodisperse Polymer Microspheres

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