高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (3): 560.

• 研究论文 • 上一篇    下一篇

表面富含羧基的单分散交联聚合物微球的快速自组装制备胶体晶的研究

陈志民, 陈鑫, 张恺, 崔铁钰, 崔占臣, 杨柏   

  1. 吉林大学超分子结构与材料教育部重点实验室, 化学学院, 长春 130023
  • 收稿日期:2002-12-10 出版日期:2004-03-24 发布日期:2004-03-24
  • 通讯作者: 杨 柏(1962年出生),男,博士,教授,博士生导师,主要从事功能性聚合物光学材料的研究.E-mail;yangbai@j lu.edu.cn E-mail:yangbai@j lu.edu.cn
  • 基金资助:

    国家重点基础研究专项经费(批准号;G1999064803);国家自然科学基金(批准号;200340062)资助

Investigation on Colloidal Crystals Fabricated by Rapid Self-assembly of Monodispersed Cross-linked Carboxy-modified Polymer Microspheres

CHEN Zhi-Min, CHEN Xin, ZHANG Kai, CUI Tie-Yu, CUI Zhan-Chen, YANG Bai   

  1. Key Lab of Supramolecular Structure and Materials, Ministry of Education, College of Chemistry, Jilin University, Changchun 130023, China
  • Received:2002-12-10 Online:2004-03-24 Published:2004-03-24

摘要: 在20~70℃范围内,用垂直沉积的方法可使表面富含羧基的单分散交联聚合物微球在不同的基底上快速自组装成三维有序的胶体晶.不同粒径的微球形成的胶体晶其光禁带峰位不同,因此可调控不同波长的光在胶体晶中的传播.利用紫外-可见光谱研究了胶体晶的光禁带峰位与组成其微球粒径之间的关系.结果表明,随着构成胶体晶微球粒径的增大,胶体晶光禁带峰位发生了红移,而随着入射光角度的增大,胶体晶的光禁带峰位发生了蓝移.利用原子力显微镜和扫描电子显微镜研究了其它条件对聚合物微球有序排列的影响,发现聚合物微球在pH值为3.0~13.0范围内可以形成三维有序自组装胶体晶.这是由于在不同的pH值下,聚合物微球表面发生羧基化及去羧基化反应,导致在自组装过程中微球之间和微球与介质之间作用力的变化

关键词: 表面富含羧基的聚合物微球, 垂直沉积法, 快速自组装, 胶体晶

Abstract: By means of vertical deposit method on several kinds of substrates, mondispersed cross-linked-carboxy modified polymer microspheres were self assembled into colloidal crystals rapidly in the temperature range of 20_70 ℃. The colloidal crystals fabricated by the polymer microspheres with different diameters show different stop-bands due to the Bragg diffraction. The relationship between the stop-band of colloidal crystals and the diameters of polymer microspheres were investigated by using UV-Vis spectra. Experiments had proved that the stop band red-shefted with increasing the diameters of the polymer microspheres, while blue-shifted with the increasing of the incidence angle. It was studied that the effects of pH value and other factors on the self-assembly of these polymer microspheres by SEM and AFM. We found that the polymer microspheres could form colloidal crystals in a broad range of pH value from3.0 to 13.0, which was mainly based on the fact that the microspheres can change their surface properties by turning carboxy groups to their corresponding ions at different pH values. The property of these microspheres could manipulate the interactions among themselves in the self-assembly procedure, leading to the above results.

Key words: Carboxy-modified polymer microsphere, Vertical deposition method, Rapid self-assembly, Colloidal crystal

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