Polyelectrolyte Complex Fiber of Alginate and Poly(diallyldimethylammonium chloride): Humidity-Induced Shape Memory and Mechanical Transition,ACS Applied Polymer Materials

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Polyelectrolyte Complex Fiber of Alginate and Poly(diallyldimethylammonium chloride): Humidity-Induced Shape Memory and Mechanical Transition
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-04-24 , DOI: 10.1021/acsapm.0c00056
Wentao Huang ₁ , Jiefu Li ₁ , Dezhong Liu ₁ , Shuaixia Tan ₂ , Pengfei Zhang ₁ , Liping Zhu ₁ , Shuguang Yang ₁

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In this work, a polyelectrolyte complex (PEC) fiber of alginate (ALG) and poly(diallyldimethylammonium chloride) (PDDA) is prepared by restricting polyelectrolyte complexation with salt to fit wet-spinning protocol. The ALG/PDDA PEC fiber adsorbs water from the environment fast and shows a quick mechanical response to humidification. When the environment humidity is lower than 65%, the fiber performs like a plastic material, with a modulus of ∼10⁹ Pa. As the humidity increases above 65%, the fiber exhibits a sharp plastic–rubber transition with a significant modulus drop to ∼10⁶ Pa. After the rubber plateau is reached, the modulus continues to decline when further increasing humidity. Furthermore, the ALG/PDDA fiber presents a humidity-induced shape memory effect. The humidity-adaptive behaviors of ALG/PDDA have potential for different applications, such as actuation and sensing.

中文翻译：

海藻酸盐和聚二烯丙基二甲基氯化铵的聚电解质复合纤维：湿度诱导的形状记忆和机械转变

在这项工作中，通过限制盐与聚电解质的络合以适应湿纺方案，制备了藻酸盐（ALG）和聚二烯丙基二甲基氯化铵（PDDA）的聚电解质络合物（PEC）纤维。ALG / PDDA PEC纤维可快速从环境中吸收水，并显示出对加湿的快速机械响应。当环境湿度低于65％时，纤维的性能类似于塑料材料，模量约为^{10 9} Pa。当湿度增加至65％以上时，纤维表现出急剧的塑性-橡胶转变，模量显着下降至〜10 ⁶Pa。达到橡胶平稳期后，当湿度进一步增加时，模量继续下降。此外，ALG / PDDA纤维具有湿度引起的形状记忆效应。ALG / PDDA的湿度适应行为可能会在不同的应用（例如致动和传感）中发挥作用。

更新日期：2020-04-24

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