氧化石墨烯/多壁碳纳米管影响天然橡胶性能的实验研究  

Effect of graphene oxide/multi-walled carbon nanotubes on the properties of natural rubber and experimental research

作　　者：高浩 时文欣 宋维浩 李利[1] GAO Hao;SHI Wenxin;SONG Weihao;LI Li(College of Electromechanical Engineering,Qingdao University of Science&Technology,Qingdao 266100,China)

机构地区：[1]青岛科技大学机电工程学院,青岛266100

出　　处：《复合材料学报》2022年第5期2172-2182,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51345006)。

摘　　要：氧化石墨烯(GO)和多壁碳纳米管(MWCNTs)因其良好的力学性能和导热性能,被广泛应用于橡胶填料。为了提高硫化效率,改善天然橡胶的物理性能,本论文将不同配比的GO和MWCNTs与橡胶混炼制备了一种GO/MWCNTs橡胶复合材料。通过测试混炼胶以及硫化胶的各项物理性能得出结论,GO填料与MWCNTs填料二者存在协同作用,并且不同配比的GO与MWCNTs对胶料性能的影响也不同,当MWCNTs填料定量加入6wt%时,随着GO含量的增加:硫化胶的最大转矩M_(H)与交联密度ΔM值呈增大趋势;焦烧时间t_(c10)和正硫化时间t_(c90)先降低,在3wt%后t_(c90)略有回升,且当GO与MWCNTs含量分别为3wt%和6wt%时,对硫化效率的提升最为明显;当二者同时加入6wt%时,混炼胶与硫化胶的导热率分别提高了25.1%和23.3%;硫化胶的100%定伸应力、300%定伸应力出现升高趋势,在3wt%之后略微下降。综合来看,当GO与MWCNTs添加量分别为3wt%与6wt%时,填料粒子对橡胶的补强效果最佳,其良好的导热性能增强了硫化反应的均匀性,实现了硫化过程的节能减耗。Graphene oxide(GO)and multi-walled carbon nanotubes(MWCNTs)are widely used in rubber fillers due to their good mechanical properties and thermal conductivity.In order to increase the vulcanization efficiency and improve the physical properties of natural rubber,a GO/MWCNTs rubber composite was prepared by mixing graphene oxide and multi-walled carbon nanotubes with rubber in different proportions.Through testing the physical properties of the rubber compound and the vulcanized rubber,it is concluded that there is a synergistic effect between MWCNTs filler and GO filler,and different ratios of GO and MWCNTs have different effects on the performance of the rubber compound.When MWCNTs filler is added quantitatively at 6wt%,with the increase of GO content:the maximum torque M_(H) of the vulcanized rubber and the crosslinking densityΔM value increased;the scorch time t_(c10) and the normal vulcanization time t_(c90) decreased first,and t_(c90) rose slightly after 3wt%.When the content of GO and MWCNTs are 3wt%and 6wt%,the improvement of vulcanization efficiency is most obvious;when the two are added at 6wt%at the same time,the thermal conductivity of the compound and the vulcanized rubber are increased by 25.1%and 23.3%respectively;the 100%of the vulcanized rubber is fixed.Tensile stress and 300%constant elongation stress have a rising trend,and slightly decrease after 3wt%.Taken together,when GO and MWCNTs are added at 3wt%and 6wt%,respectively,the filler particles have the best reinforcement effect on the rubber.Its good thermal conductivity enhances the uniformity of the vulcanization reaction and realizes energy saving and consumption reduction in the vulcanization process.

关 键 词：橡胶复合材料 协同作用 导热性 硫化效率 橡胶填料 石墨烯 多壁碳纳米管 

分 类 号：TB332[一般工业技术—材料科学与工程]