纳米纤维素-可聚合低共熔溶剂离子导电弹性体的制备及性能研究

Study on Preparation and Properties of Nanocellulose-Polymerizable Deep Eutectic Solvents Ionic Conductive Elastomer

关键词:  离子导电弹性体  可聚合低共熔溶剂  纤维素纳米纤丝  植酸

Key Words:ionic conductive elastomer  polymerizable deep eutectic solvents  cellulose nanofibril  phytic acid

摘要:本研究采用紫外光引发原位聚合法将丙烯酸-氯化胆碱合成的可聚合低共熔溶剂（polymerizable deep eutectic solvents，PDES）与纤维素纳米纤丝（cellulose nanofibril，CNF）气凝胶结合，并引入植酸以增强CNF与PDES之间的结合作用，制得含有丰富的共价键和非共价键（氢键）的离子导电弹性体，通过多种现代仪器分析测试其性能。结果表明，该离子导电弹性体在机械性能（应力和应变分别可达0.38 MPa和1378%）、热稳定性、抗冻性、离子电导性（离子电导率可达3.9 mS/m）和紫外屏蔽性方面具有明显优势，同时具有一定的抗疲劳性和弹性，且基于其组装的柔性应变传感器对人体运动表现出快速、稳定、可逆的信号响应。

Abstract:In this study， polymerizable deep eutectic solvents （PDES） synthesized from acrylic acid and choline chloride was combined with cellulose nanofibril （CNF） aerogels by UV-initiated in situ polymerization， and phytic acid was introduced to enhance the bonding between CNF and PDES. The ionic conductive elastomers containing abundant covalent bonds and non-covalent bonds （hydrogen bonds） were prepared， and their properties were tested by a variety of modern instruments. The results showed that the ionic conductive elastomers had obvious advantages in mechanical properties （stress of 0.38 MPa and strain of 1378%）， thermal stability， frost resistance， ionic conductivity （ionic conductivity up to 3.9 mS/cm） and UV shielding， and had certain fatigue resistance and elasticity. And the flexible strain sensor based on the assembly showed rapid， stable and reversible signal responsed to human movement.