A bio-based, self-healable, conductive rubber film with oxidized cellulose nanofiber segregated network

文献类型： 外文期刊

第一作者： Guo, Yuanming

作者： Guo, Yuanming;Lin, Zihao;He, Mingkeng;Xu, Chuanhui;Wang, Yueqiong;Xu, Chuanhui

作者机构：

关键词： Oxidized natural rubber; Oxidized cellulose nanofiber; Segregated network; Mechanical properties; Self-healing; Conductivity

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）

ISSN： 0141-8130

年卷期： 2024 年 281 卷

页码：

收录情况： SCI

摘要： Rubber composites are indispensable in all areas of our daily lives. However, the formation of permanent crosslinked networks in rubber materials makes it difficult to recycle, resulting in a non-negligible waste of resources. In this paper, a vulcanization-free, fully bio-sourced rubber composite was prepared by using oxidized natural rubber (oNR) and oxidized cellulose nanofibers (TOCFs). TOCFs are selectively dispersed between the latex particles to form a segregated network. Meanwhile, the formation of hydrogen-bonding between oxygenated polar groups of oNR and abundant hydroxyl and carboxyl groups of TOCFs improves their interfacial interactions. This special structure promotes strain-induced crystallization (SIC) behavior of oNR matrix, giving its tensile strength up to 14.7 MPa. Furthermore, the oNR/TOCFs film shows excellent self-healing efficiency (96 %) at 40 degrees C for 5 h. The hygroscopicity of the TOCFs segregated network can turn the oNR/TOCFs film to be a conductive film by regulating the absorbed water content. The film has high conductivity (0.05 S/m) at a water content of 8.99 wt%, and the resistance change (RV/R0) can be varied between 1-5.9 x 10-6 at a water content range of 0-8.99 wt%, which makes it have potential for a wide range of humidity monitoring applications.

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