自愈水凝胶
材料科学
复合数
离子键合
化学工程
制作
纤维素
多孔性
电解质
离子电导率
X射线光电子能谱
纳米技术
高分子化学
复合材料
化学
电极
离子
有机化学
医学
替代医学
病理
物理化学
工程类
作者
Qianxiao Chen,Yiming Zhou,Shicheng Lu,Wenkai Xu
标识
DOI:10.1016/j.eurpolymj.2023.112438
摘要
A novel κ-carrageenan composite hydrogel via incorporation of TEMPO-oxidized cellulose nanofibrils (TCNF) and polydopamine (PDA) nanoparticles, was fabricated by ionic interaction to achieve a higher mechanical and higher conductive performance. Owing to the excellent compatibility and stability of the TCNF-PDA mixture, and the strong ionic interactions between the hydrogel precursor and metal cations in the hydrogel formation, the composite hydrogel showed improved mechanical property of 73.5 kpa and a faster gel formation process of 58 s. The gel formation mechanism was comprehensively illustrated by XPS technique, a double-network with one main noncovalent interaction was created inside the hydrogels. Moreover, the inter-connected porous hydrogel structure with smaller pores improved current carrying and diffusion of electrolyte metal cations, the conductivity reached at 2.13 S/m. It could also sensitively and stably detect the external stress applied, demonstrating such hydrogel was beneficial to be applied at flexible electronic devices.
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