高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (1): 192.

• 研究快报 • 上一篇    下一篇

聚羟基丁酸酯共聚物超薄膜中向日葵晶形成的原子力显微镜观察

王震1, 徐军1, 谢续明1, 王秀凤2   

  1. 1. 清华大学化工系高分子研究所;
    2. 清华大学物理系,北京 100084
  • 收稿日期:2004-08-06 出版日期:2005-01-10 发布日期:2005-01-10
  • 通讯作者: 谢续明(1962年出生),男,博士,教授,博士生导师,主要从事高分子物理化学和聚合物新型材料的研究.E-mail:xxm-dce@tsinghua.edu.cn E-mail:xxm-dce@tsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20174022);国家重大基础研究计划“理论物理学及其交叉科学若干前沿问题”子课题(批准号:90103035);国家自然科学重点基金(批准号:10334020);清华大学分析测试基金资助

AFM Observation of Sunflower-like Crystalline Morphology Formed in Ultra-thin Film of Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

WANG Zhen1, XU Jun1, XIE Xu-Ming1, WANG Xiu-Feng2   

  1. 1. Insistite of Polymer Science and Engineering, Department of Chemical Engineering;
    2. Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2004-08-06 Online:2005-01-10 Published:2005-01-10

关键词: 薄膜, 向日葵晶形貌, 液-液相分离

Abstract: Poly(3-hydroxybutyrate-co-103-hydroxyhexanoate)(PHBHHx) thin films were prepared by means of spin-coating PHBHHx/chloroform solutions on the silicon substrate. The crystalline morphologies of PHBHHx thin films were observed by atomic force microscopy(AFM) at room temperature. A novel crystalline morphology, that is like sunflower was found when the film is very thin and named as sunflower-like crystalline morphology. Compared with usual PHBHHx spherulites, there are obvious differences in aspects of nucleation, crystal growth process and crystalline morphology for the sunflowers. The PHBHHx/chloroform solution properties and the substrate have great effects on the formation of the sunflower. A circular boundary that may result from a liquid-liquid phase separation in PHBHHx solution first formed in the thin film during the spin-coating process, then it induced the formation of the sunflowers.

Key words: Thin film, Sunflower-like crystal morphology, Liquid-liquid phase separation

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