Wen Shipeng, Zhang Rui, Xu Zongchao, Zheng Long, Liu Li
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing 100029, China.
Materials (Basel). 2020 Nov 28;13(23):5416. doi: 10.3390/ma13235416.
The topology of nanofillers is one of the key factors affecting the gas barrier properties of rubber composites. In this research, three types of carbon-based nanofillers, including spherical carbon black (CB), fibrous carbon nanotubes (CNTs), and layered graphene (GE) were chosen to investigate the effect of the topological structures of nanofillers on the gas barrier properties of styrene-butadiene rubber (SBR) composites. Results showed that the structure and strength of the filler networks in SBR composites were closely associated with the topology of nanofillers. When filled with 35 phr CB, 8 phr CNTs, and 4 phr GE, the SBR composites had the same strength of the filler network, while the improvement in gas barrier properties were 39.2%, 12.7%, and 41.2%, respectively, compared with pure SBR composites. Among the three nanofillers, GE exhibited the most excellent enhancement with the smallest filler content, demonstrating the superiority of two-dimensional GE in improving the barrier properties of rubber composites.
纳米填料的拓扑结构是影响橡胶复合材料气体阻隔性能的关键因素之一。在本研究中，选择了三种类型的碳基纳米填料，包括球形炭黑（CB）、纤维状碳纳米管（CNT）和层状石墨烯（GE），以研究纳米填料的拓扑结构对丁苯橡胶（SBR）复合材料气体阻隔性能的影响。结果表明，SBR复合材料中填料网络的结构和强度与纳米填料的拓扑结构密切相关。当填充35 phr的CB、8 phr的CNT和4 phr的GE时，SBR复合材料具有相同强度的填料网络，而与纯SBR复合材料相比，气体阻隔性能的提高分别为39.2%、12.7%和41.2%。在这三种纳米填料中，GE在填料含量最小时表现出最优异的增强效果，证明了二维GE在改善橡胶复合材料阻隔性能方面的优越性。
