线性三嵌段共聚物格点薄膜受限下的自组装

doi:10.3785/j.issn.1008-9497.2018.06.011

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摘要采用实空间自洽场理论研究了线性三嵌段共聚物在格点薄膜受限下的自组装.根据受限空间内共聚物的自组装情况，描绘了不同嵌段比下共聚物的三角相图，分析各相结构的形成机理，并详细观察三色层状与核壳柱状之间的相变过程.在受限的基础上，通过在薄膜表面施加格点型吸附势，获得了一系列聚合物微结构，发现层状结构是最稳定的相结构；当吸附强度增大时，各嵌段的自组装结构发生变化，三色层逐渐打破稳定的平行状态，转变为编织层状.当嵌段比处于某特殊范围时，聚合物还形成了新颖的球-柱结构.研究结果可为制备稳定的新型材料提供理论方案.

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	张乾
	吴骥
	余胜东
	王向红

关键词 ：线性三嵌段共聚物, 相图, 自洽场理论, 图案受限, 吸附势

Abstract：The real-space self-consistent field theory was used to study the phase diagrams of ABC linear triblock copolymers under thin-film confinement and the rules of phase transformation. Based on the self-assembly of the copolymers in the confined space, the triangular phase diagrams of the copolymers were plotted. Then the formation mechanism of each phase structure was analyzed, and the phase transition between the three-color layered and core-shell columns was investigated in detail. A series of microstructures were obtained by applying lattice-type adsorption potentials to the surface of the film. It was found that the lamellar structure was the most stable one in the phase diagram. As the strength of adsorption increased, the self-assembly structure of each block started to be distinguished from that with weak absorption. The parallel state of tricolor lamellas was gradually broken down and translated to knitting pattern structure. The copolymers also formed a novel phase-sphere-column structure within specific block ratio range. All these discoveries provide theoretical solutions for the preparation of new stable materials.

Key words： linear triblock copolymer phase diagram self-consistent field theory pattern confinement adsorption potential

收稿日期: 2018-04-05

ZTFLH:

O631.1

基金资助:国家自然科学基金资助项目（21674082，21474076，11875205）；浙江省自然科学基金资助项目（LZ13F020003）.

通讯作者: 王向红,ORCID:http://orcid.org/0000-0003-3165-814X,E-mail:wxh@wzvtc.edu.cn. E-mail: wxh@wzvtc.edu.cn

作者简介: 张乾(1992-),ORCID:http://orcid.org/0000-0001-5888-5778,男,硕士研究生,主要从事高分子物理研究.

引用本文:

张乾, 吴骥, 余胜东, 王向红. 线性三嵌段共聚物格点薄膜受限下的自组装[J]. 浙江大学学报（理学版）, 2018, 45(6): 707-713.
ZHANG Qian, WU Ji, YU Shengdong, WANG Xianghong. Self-assembly of linear triblock copolymers confined by lattice-type films. Journal of ZheJIang University(Science Edition), 2018, 45(6): 707-713.

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http://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2018.06.011 或 http://www.zjujournals.com/sci/CN/Y2018/V45/I6/707

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