A bio-based, self-healable, conductive rubber film with oxidized cellulose nanofiber segregated network
文献类型： 外文期刊
作者： Guo, Yuanming 1 ; Lin, Zihao 1 ; He, Mingkeng 1 ; Wang, Yueqiong 2 ; Xu, Chuanhui 1 ;
作者机构： 1.Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China
2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Hainan Prov Key Lab Nat Rubber Proc, Zhanjiang 524001, Guangdong, Peoples R China
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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