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主管单位 中华人民共和国
工业和信息化部
主办单位 中国材料研究学会
哈尔滨工业大学
主编 苑世剑 国际刊号ISSN 1005-0299 国内刊号CN 23-1345/TB

引用本文:孙胜童,武培怡.温敏水溶性聚合物的二维分子光谱表征[J].材料科学与工艺,2017,25(1):1-9.DOI:10.11951/j.issn.1005-0299.20160386.
SUN Shengtong,WU Peiyi.Two-dimensional spectral characterization of thermoresponsive water-soluble polymers[J].Materials Science and Technology,2017,25(1):1-9.DOI:10.11951/j.issn.1005-0299.20160386.
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温敏水溶性聚合物的二维分子光谱表征
孙胜童1,2, 武培怡1,2,3
(1.先进低维材料中心(东华大学),上海201620;2.东华大学 化学化工与生物工程学院,上海201620; 3.复旦大学 高分子科学系,上海200433)
摘要:
基于二维相关光谱的多维分子光谱技术是近些年发展起来的先进光谱分析手段,特别适合于在分子水平上研究各种外扰作用下的物理化学体系的结构变化.本文就二维相关光谱及其衍生的外扰相关移动窗口技术对温敏水溶性聚合物体系尤其是LCST型聚合物体系的研究进展进行了综述.LCST型聚合物水溶液在LCST(低临界溶解温度)变化前后会发生线团-胶束的分子链构象变化,而在凝胶体系内则表现为体积的塌缩与溶胀.红外光谱可以很好地跟踪这一温度变化的过程,而一维及二维相关光谱分析可以方便地确定相转变温度、转变温度区间、响应程度及各基团的响应次序,非常有助于诠释温敏聚合物体系的响应机制.本文综述了二维相关光谱分析在LCST型均聚物、共聚物和共混物、凝胶以及聚合物刷体系中的典型应用.
关键词:  温敏水溶性聚合物  LCST  相转变  二维相关光谱  外扰相关移动窗口
DOI:10.11951/j.issn.1005-0299.20160386
分类号:O631.1
文献标识码:A
基金项目:国家自然科学基金资助项目(0,8, 21604024).
Two-dimensional spectral characterization of thermoresponsive water-soluble polymers
SUN Shengtong1,2,WU Peiyi1,2,3
(1.Center for Advanced Low-Dimension Materials(Donghua University), Shanghai 201620, China; 2.College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China; 3.Department of Macromolecular Science, Fudan University, Shanghai 200433, China)
Abstract:
Two-dimensional spectral analysis based on two-dimensional correlation spectroscopy has been proved to be a very powerful tool to study the structural changes of various physical-chemical systems at the molecular level. This review summarize the recent research progress of two-dimensional correlation spectroscopy and its derivative technique, perturbation correlation moving window, in the investigation of thermoresponsive water-soluble polymers, especially LCST (lower critical solution temperature)-type polymers. Around LCST, LCST-type polymers in aqueous solutions undergo coil-to-globule conformational changes while in gel, volume phase transitions LCST-type polymers exhibit collapsing and swelling, which can be well traced by in-situ IR spectroscopy. Based on dynamic IR spectra, the combined one- and two-dimensional correlation spectroscopy analysis can be used to easily determine the transition temperature, transition temperature range, temperature-responsiveness, and the sequence order of different species, which are very helpful to illustrate the whole transition process. In this review, we will mainly emphasize on the typical applications of two-dimensional correlation spectroscopy analysis in the systems of LCST-type homopolymers, copolymers and mixtures, gels, and polymer brushes.
Key words:  thermoresponsive water-soluble polymer  LCST  phase transition  two-dimensional correlation spectroscopy  perturbation correlation moving window

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