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Photocurable ABA triblock copolymer-based ion gels utilizing photodimerization of coumarin†
RSC Advances ( IF 3.9 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1039/c7ra13181j Ryota Tamate 1 , Takeshi Ueki 2 , Aya Mizutani Akimoto 3 , Ryo Yoshida 3 , Toshiyuki Oyama 1 , Hisashi Kokubo 1 , Masayoshi Watanabe 1
RSC Advances ( IF 3.9 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1039/c7ra13181j Ryota Tamate 1 , Takeshi Ueki 2 , Aya Mizutani Akimoto 3 , Ryo Yoshida 3 , Toshiyuki Oyama 1 , Hisashi Kokubo 1 , Masayoshi Watanabe 1
Affiliation
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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.
中文翻译：
利用香豆素光二聚化的可光固化 ABA 三嵌段共聚物离子凝胶†
在此，我们开发了一种基于光固化 ABA 三嵌段共聚物的离子凝胶，它可以通过光诱导二聚化从可热加工的物理交联离子凝胶转化为热和机械稳定的化学交联离子凝胶。A 嵌段由N的无规共聚物组成-异丙基丙烯酰胺和含香豆素的丙烯酸酯单体，而 B 嵌段由亲离子液体的聚（环氧乙烷）组成。由于 A 嵌段的上临界溶解温度型相行为，ABA 三嵌段共聚物随着温度的升高在疏水离子液体中经历凝胶到溶胶的转变。此外，在紫外（UV）光照射下，凝胶中A嵌段在低温下缔合形成的物理交联，由于A嵌段中香豆素部分的光二聚作用而发生化学交联；这导致从热可逆、物理交联的离子凝胶转变为热不可逆、化学交联的离子凝胶。已经详细研究了离子凝胶在紫外线照射下的流变学变化。此外，
更新日期：2018-01-17
中文翻译：
利用香豆素光二聚化的可光固化 ABA 三嵌段共聚物离子凝胶†
在此，我们开发了一种基于光固化 ABA 三嵌段共聚物的离子凝胶，它可以通过光诱导二聚化从可热加工的物理交联离子凝胶转化为热和机械稳定的化学交联离子凝胶。A 嵌段由N的无规共聚物组成-异丙基丙烯酰胺和含香豆素的丙烯酸酯单体，而 B 嵌段由亲离子液体的聚（环氧乙烷）组成。由于 A 嵌段的上临界溶解温度型相行为，ABA 三嵌段共聚物随着温度的升高在疏水离子液体中经历凝胶到溶胶的转变。此外，在紫外（UV）光照射下，凝胶中A嵌段在低温下缔合形成的物理交联，由于A嵌段中香豆素部分的光二聚作用而发生化学交联；这导致从热可逆、物理交联的离子凝胶转变为热不可逆、化学交联的离子凝胶。已经详细研究了离子凝胶在紫外线照射下的流变学变化。此外，
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