高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (9): 1717.

• 论文 • 上一篇    下一篇

纳米Fe3O4/聚苯乙烯均匀分散体系的制备及结构

章永化1, 陈守明1, 陈建华1, 熊红兵1, 张启卫2, 沈辉3, 龚克成1   

  1. 1. 华南理工大学高分子科学系, 广州 510640;
    2. 三明学院化学生物系, 三明 365004;
    3. 中国科学院广州能源研究所, 广州 510070
  • 收稿日期:2002-05-22 出版日期:2003-09-24 发布日期:2003-09-24
  • 通讯作者: 章永化(1966年出生),男,博士,副教授,从事聚合物/无机纳米复合材料和高分子合成、改性与加工等方面研究.E-mail:pszhyhua@scut.edu.cn E-mail:pszhyhua@scut.edu.cn
  • 基金资助:

    广东省自然科学基金(批准号:020891)

Preparation and Structure of Fe3O4Nanoparticle-polystyrene Uniformly Dispersed System

ZHANG Yong-Hua1, CHEN Shou-Ming1, CHEN Jian-Hua1, XIONG Hong-Bing1, ZHANG Qi-Wei2, SHEN Hui3, GONG Ke-Cheng1   

  1. 1. Department of Polymer Science, South China University of Technology, Guangzhou 510640, China;
    2. Department of Chemical and Biological Engineering, Sanming College, Sanming 365004, China;
    3. Guangzhou Institute of Energy Conversion, Guangzhou 510070, China
  • Received:2002-05-22 Online:2003-09-24 Published:2003-09-24

PDF (PC)

摘要： 用化学共沉淀法制备了Fe3O4纳米颗粒,以油酸为表面活性剂,苯乙烯为载液,制备了稳定的纳米Fe3O4可聚合磁流体,将可聚合磁流体经自由基引发聚合制成纳米Fe3O4/聚苯乙烯均匀分散体系,用WAXRD研究了Fe3O4纳米粒子的结晶情况;用FTIR研究了油酸表面改性前后Fe3O4粒子表面官能团的变化;用TEM研究了Fe3O4颗粒的粒径大小及其在苯乙烯单体和聚苯乙烯中的分散情况;用DSC和TGA研究了纳米Fe3O4/聚苯乙烯均匀分散体系的玻璃化转变温度(Tg)和热稳定性,结果表明,合成的纳米Fe3O4为立方晶型,平均粒径在10nm左右,油酸分子在Fe3O4表面是化学吸附,经表面处理的Fe3O4超细颗粒在苯乙烯和聚苯乙烯基体中分散较均匀.界面粘结较好,含1.8％Fe3O4纳米颗粒的聚苯乙烯的最大热失重温度比聚苯乙烯提高了13K,Fe3O4/聚苯乙烯复合体系的饱和磁化强度σs为17.43emu/g.

关键词: 化学共沉淀法, 纳米Fe3O4, 可聚合磁流体, 聚苯乙烯, 均匀分散体系

Abstract: The nano-particles of Fe3O4were prepared by a chemical co-precipitation method. Astable polymerizable magnetic fluid of nano-Fe3O4was obtained by dispersing oleic acid-coated Fe3O4nano-particles in styrene as a carrier liquid. Auniformly dispersed system of nano-particles of Fe3O4in polystyrene has been acquired by the free radical polymerization of polymerizable magnetic fluid. The crystallization behavior and the surface of Fe3O4nano-particles before and after the modification by oleic acid were investigated by WXRD and FTIR, respectively. The particle size and size dispersion of Fe3O4nano-particles in styrene and polystyrene were studied by TEM. The glass transition temperature (Tg) and the thermal stability of nano-Fe3O4/polystyrene dispersion system were also studied by means of DSC and TGA, respectively. The results indicate that the nano-Fe3O4is a cubic crystal, the particle size is 10 nm on an average, the oleic acid molecules are chemically adsorbed on the surface of Fe3O4nano-particles, the modified Fe3O4nano-particles are dispersed homogeneously in styrene and in polystyrene. The temperature at sharp weight loss of polystyrene containing only 1.8% Fe3O4nano-particles is 13 Khigher than polystyrene and its saturation magnetization is 17. 43 emu/g.

Key words: Chemical co-precipitation method, Fe3O4nano-particles, Polymerizable magnetic fluid, Polystyrene, Uniformly dispersed system

中图分类号: 

TrendMD: