碳纳米管/天然橡胶复合材料的物理性能

为拓展碳纳米管应用领域,开发新型橡胶纳米复合材料,在碳纳米管预处理基础上,通过机械混炼方法将碳纳米管与天然橡胶复合。研究表明,与传统炭黑增强样品相比,碳纳米管在橡胶中的混入速度快,温升幅度小,混炼胶的硫化返原现象减轻。经过分散粘合体系处理,碳纳米管在橡胶中的分散性及界面粘合状况改善,热处理后复合材料的整体力学性能提高,对比炭黑增强样品,碳纳米管复合材料的弹性模量和玻璃化转变温度高,回弹及动态压缩性能好,并且热稳定性较高。

Physical properties of carbon nanotubes/natural rubber composites

Carbon nanotubes (CNTs) were mechanically mixed with natural rubber (NR) to investigate the properties of rubber nanocomposites. The characteristics of the rubber nanocomposites were contrasted to samples of natural rubber filled with carbon black. The results showed that the nanotubes mixed rapidly into the rubber with little temperature increase during the mixing. The curing reversion of rubber composites was also reduced. Treatment with a dispersing-bonding agent improves the dispersion of the CNTs in the rubber and the adhesion between the CNTs and the rubber. The mechanical properties of heat-treated rubber composites are also improved. The modulus of elasticity and the glass transition temperature of the composites are higher than those of the natural rubber filled with carbon black. The rebound degree, the dynamic compress in properties, and the thermal stability of the composites are also all improved.