Fan Zhengming, Guo Rongxin, Yang Zhongyan, Yang Yang, Liu Xingyao
Yunnan Key Laboratory of Disaster Reduction in Civil Engineering, Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China.
Yunnan Sunny Road & Bridge Co., Ltd., Kunming 650500, China.
Polymers (Basel). 2022 Aug 16;14(16):3326. doi: 10.3390/polym14163326.
Three different blending procedures were used to create multiwalled carbon nanotube (MWCNT)-modified chloroprene rubber (CR)/natural rubber (NR) blended composites (MWCNT/CR-NR). The effects of the blending process on the morphology of the conductive network and interfacial contacts were researched, as well as the resistance-strain response behavior of the composites and the mechanism of composite sensitivity change under different processes. The results show that MWCNT/CR-NR composites have a wide strain range (ε = 300%) and high dynamic resistance-strain response repeatability. Different blending procedures have different effects on the morphology of the conductive network and the interfacial interactions of the composites. If the blending procedures have wider conductive phase spacing and stronger interfacial contacts, the change in the conductive path and tunneling distance occurs more rapidly, and the material has a higher resistance-strain response sensitivity.
采用三种不同的共混工艺制备了多壁碳纳米管（MWCNT）改性氯丁橡胶（CR）/天然橡胶（NR）共混复合材料（MWCNT/CR-NR）。研究了共混工艺对导电网络形态和界面接触的影响，以及复合材料的电阻-应变响应行为和不同工艺下复合材料灵敏度变化的机理。结果表明，MWCNT/CR-NR复合材料具有较宽的应变范围（ε = 300%）和较高的动态电阻-应变响应重复性。不同的共混工艺对复合材料的导电网络形态和界面相互作用有不同的影响。如果共混工艺具有更宽的导电相间距和更强的界面接触，则导电路径和隧穿距离的变化发生得更快，材料具有更高的电阻-应变响应灵敏度。
