高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (1): 172.

• 研究论文 • 上一篇    下一篇

P123重水溶液的物理凝胶化及凝胶结构

汤建凯, 孙昭艳, 安立佳   

  1. 中国科学院长春应用化学研究所, 高分子物理与化学国家重点实验室, 长春 130022
  • 收稿日期:2009-05-26 出版日期:2010-01-10 发布日期:2010-01-10
  • 通讯作者: 孙昭艳, 女, 博士, 副研究员, 主要从事高分子物理方面的研究. E-mail: zysun@ciac.jl.cn
  • 基金资助:

    国家自然科学基金(批准号: 20574070, 20734003, 50621302)和吉林省杰出青年科学基金(批准号: 20070113)资助.

Physical Gelation and Structures of P123 in D2O Solution

TANG Jian-Kai, SUN Zhao-Yan*, AN Li-Jia   

  1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2009-05-26 Online:2010-01-10 Published:2010-01-10
  • Contact: SUN Zhao-Yan. E-mail: zysun@ciac.jl.cn
  • Supported by:

    国家自然科学基金(批准号: 20574070, 20734003, 50621302)和吉林省杰出青年科学基金(批准号: 20070113)资助.

摘要:

利用 1H NMR方法, 研究了高浓度的P123(PEO20PPO70PEO20)在重水溶液中的溶胶-凝胶转变过程. 升高温度使得体系发生溶胶-凝胶转变, 进一步升高温度, 体系发生凝胶-溶胶转变. 通过对不同质子基团的谱线宽度和化学位移偏移的分析, 同时结合流变学频率扫描和同步辐射(SR)研究, 发现质量分数为30%的P123的重水溶液在凝胶化过程中, 结构经历了由立方相(cubic)-六角柱状相(hcp)-层状相(lamellar)的转变过程, 其中立方相为面心立方(fcc)和六角密堆积球状相(hcps)的混合相. 高温时从凝胶到溶胶的转变主要体现为P123形成富集区与水发生相分离的过程.

关键词: 化学位移; 同步辐射; 六角密堆积相; 重水溶液; 溶胶-凝胶转变

Abstract:

1H NMR was used to study the sol-gel transition of triblock copolymer P123(PEO20PPO70PEO20, 30%) in D2O solution by analyzing the half-height width and the chemical shift of the proton signals of the P123. The changes of gel structures for P123(30%) was investigated with rheological method and synchrotron radiation(SR). With the increase of temperature, the transition of gel phases from fcc+hcps to hcp structure and finally to lamellar structure were found. Moreover, the phase separation occurred for the P123 in D2O solution at high temperature.

Key words: Chemical shift; Synchrotron radiation(SR); Hexagonal close packed spheres(hcps); D2O solution; Trasvisition of sol-gel

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