PMMA/(BaTiO3@PMMA核壳结构纳米颗粒)高导热有机高分子体系

doi:10.6023/cjoc201406001

有机化学 ›› 2014, Vol. 34 ›› Issue (11): 2309-2316.DOI: 10.6023/cjoc201406001 上一篇下一篇

研究论文

PMMA/(BaTiO₃@PMMA核壳结构纳米颗粒)高导热有机高分子体系

吴新锋^a,b, 王瑛^a, 江平开^b, 张福华^a, 张希琴^a, 杨开亮^a

a 上海海事大学海洋科学与工程学院材料系上海 201306;
b 上海交通大学化学化工学院材料系上海 200240

收稿日期:2014-06-02 修回日期:2014-06-13 发布日期:2014-07-02
通讯作者: 吴新锋,xfwu@shmtu.edu.cn E-mail:xfwu@shmtu.edu.cn
基金资助:
国家重点基础研究发展计划(973计划, No.2014CB643306)和国家自然科学基金(Nos.51403124, 51303034)资助项目.

Highly Thermal Conductive Organic Polymer System of PMMA/(Core-shell Structured BaTiO₃@PMMA Nanoparticles)

Wu Xinfeng^a,b, Wang Ying^a, Jiang Pingkai^b, Zhang Fuhua^a, Zhang Xiqin^a, Yang Kailiang^a

a College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306;
b Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240

Received:2014-06-02 Revised:2014-06-13 Published:2014-07-02
Supported by:
Project supported by the National Basic Research Program of China (973 Program, No.2014CB643306) and the National Natural Science Foundation of China (Nos.51403124, 51303034).

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摘要/Abstract

首次使用可逆加成断裂链转移(RAFT)聚合方法, 制备了BaTiO₃@PMMA核壳结构纳米颗粒, 颗粒壳层具有厚度均匀、可控等特点, 并将其添加到聚甲基丙烯酸甲酯(PMMA)基体中制备了颗粒分散均匀的高导热性能有机高分子体系. 通过FT-IR, ¹H NMR, TGA以及TEM等测试技术对其化学结构和微观形貌进行了表征, 证明BaTiO₃表面包覆了一层完整的PMMA有机高分子, 所制备的复合粒子具有明显的核壳结构. 研究表明, 当BaTiO₃纳米颗粒添加量达到50%体积含量时, 添加未改性的BaTiO₃纳米颗粒的高分子体系的导热系数为0.894 W·m^-1·K^-1, 而添加BaTiO₃@PMMA核壳结构纳米杂化颗粒的高分子体系达到了1.137 W·m^-1·K^-1; 同时, 两种高导热高分子体系的体积电阻率均保持在10¹⁵ Ω·cm以上, 仍然具有良好的电绝缘性能.

关键词: 高分子体系, 导热, 绝缘, 核壳结构, 可逆加成断裂链转移(RAFT)聚合

A simple method to fabricate core-shell structured BaTiO₃@PMMA hybrid nanoparticles via surface initiated reversible addition-fragmentation chain transfer (RAFT) polymerization is reported. And the effects of functionalization BaTiO₃ nanoparticles on thermal properties of polymethyl methacrylate (PMMA) composites are investigated. The functionalized BaTiO₃ nanoparticles were characterized by fourier-transform infrared (FT-IR), nuclear magnetic resonance (¹H NMR), thermogravimetric analyzer (TGA), and transmission electron microscopy (TEM), which prove that a layer of PMMA polymer completely coated on the BaTiO₃ surface, and the hybrid nanoparticles exhibit obvious core-shell structure. PMMA composites were fabricated by incorporating two kinds of fillers: the as-received BaTiO₃ nanoparticles and core-shell structured BaTiO₃@PMMA hybrid nanoparticles. The study of the thermal conductivity properties and electrical insulation performance of the composite materials indicates that BaTiO₃@PMMA results in a strong interface and thus the corresponding PMMA composites exhibit significantly increased thermal conductivity than PMMA composites filled with the as-received BaTiO₃nanoparticles. When the volume content of BaTiO₃ nanoparticles is up to 50%, the thermal conductivity of the composite materials which filled with the as-received BaTiO₃ nanoparticles is 0.894 W·m^-1·K^-1, and the thermal conductivity of the composite materials which filled with the core-shell structured BaTiO₃@PMMA hybrid nanoparticles is 1.137 W·m^-1·K^-1. In addition, the two kinds of highly thermal conductive polymer composites still have a good electrical insulating performance and the volume resistivity is maintained at 10¹⁵Ω·cm above.

Key words: polymer system, thermal conductivity, insulating, core-shell structured, reversible addition-fragmentation chain transfer (RAFT) polymerization

引用此文

吴新锋, 王瑛, 江平开, 张福华, 张希琴, 杨开亮. PMMA/(BaTiO₃@PMMA核壳结构纳米颗粒)高导热有机高分子体系[J]. 有机化学, 2014, 34(11): 2309-2316.

Wu Xinfeng, Wang Ying, Jiang Pingkai, Zhang Fuhua, Zhang Xiqin, Yang Kailiang. Highly Thermal Conductive Organic Polymer System of PMMA/(Core-shell Structured BaTiO₃@PMMA Nanoparticles)[J]. Chin. J. Org. Chem., 2014, 34(11): 2309-2316.

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PMMA/(BaTiO₃@PMMA核壳结构纳米颗粒)高导热有机高分子体系

Highly Thermal Conductive Organic Polymer System of PMMA/(Core-shell Structured BaTiO₃@PMMA Nanoparticles)

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