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首页> 外文期刊>RSC Advances >Photocurable ABA triblock copolymer-based ion gels utilizing photodimerization of coumarin
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Photocurable ABA triblock copolymer-based ion gels utilizing photodimerization of coumarin

机译：基于光固化的ABA三嵌段共聚物的离子凝胶利用香豆素的光电二聚体

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摘要

Herein, we develop a photocurable ABA triblock copolymer-based ion gel, which can be converted from a thermally processable, physically crosslinked ion gel to a thermally and mechanically stable, chemically crosslinked ion gel via photoinduced dimerization. The A block consists of a random copolymer of N-isopropylacrylamide and a coumarin-containing acrylate monomer, while the B block consists of an ionic liquid-philic poly(ethylene oxide). Due to the upper critical solution temperature-type phase behavior of the A block, the ABA triblock copolymer undergoes gel-to-sol transitions in a hydrophobic ionic liquid as the temperature is increased. Furthermore, under ultraviolet (UV) light irradiation, the physical crosslinks formed by association of the A blocks in the gel at low temperatures become chemically crosslinked as a result of photodimerization of the coumarin moieties in the A block; this results in conversion from a thermo-reversible, physically crosslinked ion gel to a thermo-irreversible, chemically crosslinked ion gel. The rheological changes of the ion gel upon UV irradiation have been investigated in detail. In addition, photopatterning of the ion gel has been realized by exploiting the photocurable behavior of the ABA triblock copolymer in the ionic liquid.
机译：在此，我们开发一种可光固化的ABA三嵌段共聚物基离子凝胶，其可以通过光致二聚化从可热处理的，物理交联的离子凝胶从可热加工的物理交联的离子凝胶转化为热和机械稳定的化学交联的离子凝胶。块由N-异丙基丙烯酰胺和含香豆素的丙烯酸酯单体的随机共聚物组成，而B嵌段由离子液 - 铁（环氧乙烷）组成。由于块的上部临界溶液温度型相行为，随着温度的增加，ABA三嵌段共聚物在疏水离子液体中经历凝胶至溶胶转变。此外，在紫外线（UV）光照射下，通过在低温下凝胶中的块中的块的关联形成的物理交联作为块中香豆素部分的光电二聚体的结果化学交联;这导致从热可逆的物理交联的离子凝胶转化为热不可逆转的化学交联离子凝胶。已经详细研究了UV照射时离子凝胶的流变变化。另外，通过利用在离子液体中的ABA三嵌段共聚物的光固化性能来实现离子凝胶的照驳仪。

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  • 来源
    《RSC Advances》 |2018年第7期|共5页
  • 作者

    Tamate Ryota; Ueki Takeshi; Akimoto Aya Mizutani; Yoshida Ryo; Oyama Toshiyuki; Kokubo Hisashi; Watanabe Masayoshi;

  • 作者单位

    Yokohama Natl Univ Dept Chem &

    Biotechnol Hodogaya ku 79-5 Tokiwadai Yokohama Kanagawa 2408501 Japan;

    NIMS 1-1 Namiki Tsukuba Ibaraki 3050044 Japan;

    Univ Tokyo Sch Engn Dept Mat Engn Bunkyo Ku 7-3-1 Hongo Tokyo 1138656 Japan;

    Univ Tokyo Sch Engn Dept Mat Engn Bunkyo Ku 7-3-1 Hongo Tokyo 1138656 Japan;

    Yokohama Natl Univ Dept Chem &

    Biotechnol Hodogaya ku 79-5 Tokiwadai Yokohama Kanagawa 2408501 Japan;

    Yokohama Natl Univ Dept Chem &

    Biotechnol Hodogaya ku 79-5 Tokiwadai Yokohama Kanagawa 2408501 Japan;

    Yokohama Natl Univ Dept Chem &

    Biotechnol Hodogaya ku 79-5 Tokiwadai Yokohama Kanagawa 2408501 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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