碳纳米管束与炭黑并用对天然橡胶导热性能和动态力学性能的影响  

Effect of carbon nanotube bundles and carbon black on the thermal conductivity and dynamic mechanical properties of natural rubber

作　　者：白彦江 李京超 张茜[1,2] 周鑫磊 卢咏来 张立群[1,2] BAI YanJiang;LI JingChao;ZHANG Xi;ZHOU XinLei;LU YongLai;ZHANG LiQun(State Key Laboratory of Organi c-Inorganic Composites;Center of Advanced Elastomer Materials,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学有机无机复合材料国家重点实验室,北京100029 [2]北京化工大学先进弹性体材料研究中心,北京100029

出　　处：《北京化工大学学报（自然科学版）》2020年第4期30-38,共9页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划(“973”计划)(2015CB654703)。

摘　　要：研究不同长径比的多壁阵列碳纳米管束(carbon nanotube bundles,CNTBs)非等量替代炭黑N234并用的填料增强体系对天然橡胶(NR)导热性能和动态力学性能的影响。利用非线性拟合分析CNTBs管径与CNTBs/N234并用NR复合材料热导率的关系,发现随着CNTBs管径的减小和用量的提高,复合材料导热性能逐步提高。通过表征CNTBs在橡胶基体中形成的填料网络,发现CNTBs长径比增大和用量提高会导致杂化填料的分散效果下降即出现Payne效应,使复合材料在动态工况下损耗增大,60℃下7%应变的tanδ和疲劳温升出现增加。此外,添加长径比更大的CNTBs能提升材料的抗湿滑性能,提高玻璃化转变温度,但对磨耗性能有不利影响,CNTBs添加量为6 phr(相对于每100份以质量计量的橡胶添加的份数)时材料的磨耗体积显著增大。The effects of non-equal replacement of carbon black(N234)by multi-wall array carbon nanotube bundles(CNTBs)with different aspect ratios on the thermal conductivity and dynamic mechanical properties of natural rubber(NR)composites have been studied.We analyzed the relationship between the diameter of CNTBs and the thermal conductivity of the NR composites CNTBs/N234 by using a non-linear fitting.It was found that as the diameter of the CNTBs decrease and the loading increases,the thermal conductivity of the composite gradually improves.By characterizing the filler network in a rubber matrix with CNTBs,it was found that an increase in CNTB aspect ratio and loading leads to a decrease in the dispersion effect of the hybrid fillers—the Payne effect—which causes hysteresis loss in rubber compounds under dynamic conditions.The tanδof 7%strain at 60℃and the fatigue temperature also show a gradual increase.The addition of CNTBs with large aspect ratio can also improve the wet-resistance performance and increase the glass transition temperature,but has an adverse effect on the abrasion performance.When the loading of CNTBs was 6phr,the abrasion volume showed a significant increase.

关 键 词：多壁阵列碳纳米管束 天然橡胶 非线性拟合 PAYNE效应 玻璃化转变温度 

分 类 号：TQ330.15[化学工程—橡胶工业] TQ332.6