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    赵博文, 张静, 张琰. 超弹性自修复导电水凝胶的制备及性能[J]. 华东理工大学学报(自然科学版), 2023, 49(5): 623-630. DOI: 10.14135/j.cnki.1006-3080.20220616001
    引用本文: 赵博文, 张静, 张琰. 超弹性自修复导电水凝胶的制备及性能[J]. 华东理工大学学报(自然科学版), 2023, 49(5): 623-630. DOI: 10.14135/j.cnki.1006-3080.20220616001
    ZHAO Bowen, ZHANG Jing, ZHANG Yan. Preparation and Properties of Ultra Elastic and Self-Healing Conductive Hydrogel[J]. Journal of East China University of Science and Technology, 2023, 49(5): 623-630. DOI: 10.14135/j.cnki.1006-3080.20220616001
    Citation: ZHAO Bowen, ZHANG Jing, ZHANG Yan. Preparation and Properties of Ultra Elastic and Self-Healing Conductive Hydrogel[J]. Journal of East China University of Science and Technology, 2023, 49(5): 623-630. DOI: 10.14135/j.cnki.1006-3080.20220616001

    超弹性自修复导电水凝胶的制备及性能

    Preparation and Properties of Ultra Elastic and Self-Healing Conductive Hydrogel

    • 摘要: 为了延长导电水凝胶的使用寿命,基于席夫碱动态共价键的构建机理,在硼砂(BORAX)和氯化锂(LiCl)混合溶液中,采用丙烯酰胺、N-2-氨基乙基丙烯酰胺盐酸盐(AEAM)和N-丙烯酰氧基琥珀酰亚胺(ASI)通过一步法制备了一种具有自修复功能的导电水凝胶,并对该水凝胶的红外、力学、导电等性能进行了表征。结果表明水凝胶内部形成了席夫碱结构;通过调整各组分质量比,水凝胶的断裂伸长率最高可达1495.2%,拉伸强度最高可达328.9 kPa,电导率可达3.11 S/m,表明水凝胶具有较好的自修复功能。

       

      Abstract: The production of Schiff bases by the reversible condensation of primary amine and reactive carbonyl, such as aldehyde and ketone, is one of the most common reactions used for the construction of self-healing materials. It is desirable to develop self-healing conductive hydrogels with outstanding mechanical properties and satisfactory healing efficiency at the same time by integrating dynamic Schiff bases and hydrogen bonds. Here, a self-healing conductive hydrogel based on poly(acrylamide-N-2-amino ethylacrylamide hydrochloride-N-acryloyloxy succinimide)-BORAX/LiCl was synthesized from acrylamide (AM), N-2-aminoethyl acrylamide hydrochloride (AEAM) and N-acryloxysuccinimide (ASI) by the free-radical polymerization in a mixed solution of BORAX/LiCl. 2-Hydroxy-1-(4-(2-hydroxyethoxy)phenyl)-2-methyl-1-propanon (I2959) was used as photoinitiator under a UV irradiation of 284 nm. The conductive hydrogel is characteristic of two types of dynamic healing mechanisms base on Schiff bases and hydrogen bonds, endowing the hydrogel with excellent mechanical stability and strength. The chemical structure of N-2-aminoethyl acrylamide hydrochloride and N-acryloxysuccinimide was confirmed by 1H-NMR, and the formation of Schiff base in hydrogels was confirmed by Fourier infrared spectroscopy. The high elongation at break and self-healing efficiency of hydrogel were tested by the universal tension machine (a maximum elongation of up to 1495.2%, a strength of 328.9 kPa, and a strain healing efficiency of 56.1% within 48 h were determined). Electrochemical analysis demonstrated that the conductive hydrogel had an excellent electrical conductivity of 3.11 S/m.

       

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