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聚苯乙烯胶态晶体的合成

Fabrication of Polystyrene Colloidal Crystals

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【作者】 郝凌云周勇江万权朱玉瑞李凡庆胡源陈祖耀

【Author】 HAO Ling Yun 1,2 , ZHOU Yong 2, JIANG Wan Quan 2, ZHU Yu Rui 2 LI Fan Qing 3, HU Yuan 1, CHEN Zu Yao 2,3* (1. State Key Laboratory for Fire Science; 2. Department of Chemistry; 3. Structure Research, University of Science and Technol

【机构】 中国科学技术大学火灾国家重点实验室中国科学技术大学化学系中国科学技术大学结构研究开放实验室中国科学技术大学火灾国家重点实验室中国科学技术大学化学系 中国科学技术大学化学系合肥230026中国科学技术

【Abstract】 In this paper, we have successfully fabricated the colloidal crystals of monodispersed polystyrene latex. Styrene was polymerized in degassed water at 75 ℃, using potassium persulfate as an initiator. The surfactant was sodium dodecyl sulfate(SDS). Firstly, the monodispersed polystyrene latex with an average diameter of some nanometers was synthesized via emulsion polymerization, then these small latex particles were used to act as seeds for further growth. The size of polystyrene latex was controlled between 50 nm and 400 nm via diversifying the condition of polymerization. The resulted emulsion solution could accumulate slowly to form three dimensional ordered structure, which was induced by capillary as the solvent evaporating at room temperature. The opal is close packed face center cubic(f.c.c) lattice of polystyrene latex. Defects such as vacancies, dislocations or grain boundaries could be obviously observed from the SEM images. Reflectance spectra showed the red shift of specular reflectivity peak for the polystyrene colloidal crystal as the size of polystyrene latex increasing. It was demonstrated that the reflectance is intrinsic property of these colloidal crystals. This provides ideal model for the research and application of photonic crystals and form useful template for growth of various ordered macroporous materials.

【基金】 国家自然科学基金 (批准号 :5 95 72 0 31和 19772 0 49)资助
  • 【文献出处】 高等学校化学学报 ,Chemical Research In Chinese Universities , 编辑部邮箱 ,2001年11期
  • 【分类号】O632
  • 【被引频次】18
  • 【下载频次】286
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