Li Zhanxu, Chen Zilong, Sun Weichong, Liu Yangling, Wang Xiong, Lin Jun, Wang Jian, He Shaojian
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China.
South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China.
Polymers (Basel). 2024 Aug 22;16(16):2381. doi: 10.3390/polym16162381.
Considering the dilemma of obtaining economic and high-performance composites based on non-polar and main-chain-saturated ethylene propylene diene monomer rubber (EPDM), we proposed an effective and universal filler modification and nanocomposite preparation method. Specifically, the montmorillonite (MMT) surface was coated with polydopamine (PDA) to obtain DMMT, which was confirmed by XRD, XPS, FTIR, and TGA. After compounding DMMT gel with the solid EPDM via the gel compounding method, a silane coupling agent, vinyltrimethoxysilane, was introduced to construct covalent interactions between rubber and filler. Compared with the unmodified MMT filler EPDM, the EPDM/DMMT nanocomposite showed much fewer filler aggregates in the matrix. The highest tensile strength of the composites reached 6.5 MPa with 10 phr DMMT, almost 200% higher than that of pure EPDM.
考虑到基于非极性和主链饱和的三元乙丙橡胶（EPDM）获得经济且高性能复合材料的困境，我们提出了一种有效且通用的填料改性和纳米复合材料制备方法。具体而言，用聚多巴胺（PDA）包覆蒙脱石（MMT）以获得DMMT，这通过XRD、XPS、FTIR和TGA得到证实。通过凝胶共混法将DMMT凝胶与固体EPDM共混后，引入硅烷偶联剂乙烯基三甲氧基硅烷以构建橡胶与填料之间的共价相互作用。与未改性的MMT填料EPDM相比，EPDM/DMMT纳米复合材料在基体中的填料聚集体少得多。含10 phr DMMT的复合材料的最高拉伸强度达到6.5 MPa，比纯EPDM高出近200%。
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