高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (6): 1216.

• 研究简报 • 上一篇    

聚羟基丁酸酯环带球晶的形貌研究

徐军1, 郭宝华1, 张增民1, 陈国强2, 王秀凤3   

  1. 1. 清华大学材料科学与工程研究院, 化工系高分子研究所, 北京 100084;
    2. 清华大学材料科学与工程研究院生物系, 北京 100084;
    3. 清华大学材料科学与工程研究院物理系, 北京 100084
  • 收稿日期:2001-06-05 出版日期:2002-06-24 发布日期:2002-06-24
  • 通讯作者: 张增民(1936年出生),男,教授,博士生导师,主要从事高分子材料结构表征和改性研究.E-mail:zhangzm@mail.tsinghua.edu.cn E-mail:zhangzm@mail.tsinghua.edu.cn
  • 基金资助:

    国家“九五”攻关项目(批准号:96-C03-03-02)资助

Topography of Polyhydroxybutyrate Banded Spherulites

XU Jun1, GUO Bao-Hua1, ZHANG Zeng-Min1, CHEN Guo-Qiang2, WANG Xiu-Feng3   

  1. 1. Institute of Polymer Science & Engineering, Department of Chemical Engineering, School of Materials Science & Engineering;
    2. Department of Biological Sciences and B iotechnology;
    3. Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2001-06-05 Online:2002-06-24 Published:2002-06-24

PDF (PC)

被引次数

26

关键词: 聚羟基丁酸酯, 环带球晶, 原子力显微术, 形貌

Abstract: On polyhydroxybutyrate banded spherulites, concentric rings were observed between cross polarizers or without polarizers. The rings used to be considered as cracks. In this paper, we provide evidences to distinguish the concentric rings from cracks observed on PHBspherulites. Furthermore, atomic force microscopy confirmed that these concentric rings with varying spacing were growth terraces rather than cracks. The height of the terraces reached up to several hundred nanometers. It was observed that the external terraces were higher than the internal terraces, which was proposed to result from layer-by-layer growth. This is the first report on the new microscopic feature of polyhydroxybutyrate spherulites. Spherulites with birefringent bands, wavy fluctuation of height were also observed.

Key words: Polyhydroxybutyrate, Banded spherulites, Atomic force microscopy, Topography

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