Abstract

Two azobenzene compounds, Disperse Red 1 (DR1) and 4-aminoazobenzene (Aazo), were separately linked to poly(acrylic acid) (PAA) side chains to form PAA-DR1 and PAA-Aazo, which were then associated with poly(ethylene oxide) (PEO) to produce hydrogen-bonded polymer complex fibers. After UV irradiation, the initial modulus and yielding strength of PAA-Aazo/PEO fiber were both increased tremendously, while the mechanical properties of PAA-DR1/PEO fiber only slightly changed. After drawn and dried in vacuum, PAA-DR1/PEO and PAA-Aazo/PEO fibers with an extended length exhibited a contraction of 20% and 25% under UV irradiation, showing potential for photo-actuation.

Graphic Abstract

中文翻译：

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含偶氮苯官能团的氢键聚合物复合纤维的光响应行为

摘要

两种偶氮苯化合物，分散红1（DR1）和4-氨基偶氮苯（Aazo），分别与聚丙烯酸（PAA）侧链连接形成PAA-DR1和PAA-Aazo，然后与聚（乙烯）缔合氧化物（PEO）来生产氢键合聚合物复合纤维 紫外线照射后，PAA-Aazo / PEO纤维的初始模量和屈服强度均大大提高，而PAA-DR1 / PEO纤维的机械性能仅发生了微小变化。在真空中拉伸和干燥后，具有延长长度的PAA-DR1 / PEO和PAA-Aazo / PEO纤维在紫外线照射下表现出20％和25％的收缩，显示出光致活化的潜力。

图形摘要