摘要
以HNO_3/H_2SO_4改性的多壁碳纳米管(CNTs)为原料,制备多壁碳纳米管(CNTs)/天然橡胶(NR)复合材料,研究了在NR中填充CNTs对其力学性能、动态性能、Payne效应、压缩生热和损耗因子的影响。结果表明:经HNO_3/H_2SO_4混合酸改性的CNTs表面含有氢原子、含氧官能团和自由基,增强了大管径CNTs与橡胶基体间界面结合,如物理吸附、氢键作用、化学结合等。其结果是,随着CNTs管径的增大,对复合材料的补强作用增强,压缩温升小,其Payne效应也降低;损耗因子(tanδ)越大压缩温升越高;填充不同管径CNTs的份数越大,碳纳米管之间的平均距离减小,更易形成聚集体,其复合材料的Payne效应越大。
A mixture of concentrated HNO3/H2SO4 was used to modify the multi-walled carbon nano-tubes （CNTs） and the multi-walled carbon nano-tubes （CNTs）/natural rubber（NR） composites were prepared. The influence of the structure of CNTs on the mechanical properties, dynamic properties, payne-effect, the dynamic heat generation and tang of multi-walled carbon nano-tubes （CNTs）/natural rubber（NR） composites were investigated. The results show that after acid treatment the free functional groups, atoms of hydrogen and oxygen functional groups formed on the surface of CNTs, the interactions between large diameter CNTs and the rubber matrix such as physical absorption, hydrogen bonding and chemical bonding were improved; and with increase of diameter of CNTs in the nanocomposite, the characteristic values of temperature dropped, the tensile strength exhibited an upward trend, and the payne-effects of filler-filler decreased obviously. Temperature and tanδ rising trend were consistent. With the increase of the amounts of CNTs filled to the composite, inter-aggregate distance of CNTs was decrease and easy to form CNTs aggregating, leding to the payne-effect increased.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2013年第1期7-12,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金51173110和51103086
辽宁省自然科学基金201102173资助项目~~
