氧化石墨烯在橡胶中的应用研究

发布时间：2018-03-20 01:21

  本文选题：氧化石墨烯　切入点：橡胶　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：氧化石墨烯(GO)由于其具有优异的力学和阻隔性能、比表面大、成本低、易制备等优点,在学术界和工业界引起了广泛的重视。在本文研究中,将GO添加到橡胶中制备高性能的橡胶复合材料,主要研究结果如下:采用聚乙烯吡咯烷酮(PVP)改性GO得到PVP改性的GO(PGO),然后进一步部分还原得到PRGO。采用简单而且环保的胶乳共混法制备了三种系列的天然橡胶(NR)/GO,NR/PGO和NR/PRGO硫化胶。研究了 PGO和PRGO的改性机理及其对橡胶性能的影响。结果表明,PVP分子与GO发生氢键相互作用,而PVP分子通过非共价相互作用吸附在RGO的基面。与未填充填料的NR硫化胶相比,添加5份PGO的NR/PGO硫化胶的拉伸强度、撕裂强度和导热系数分别提高了 81%、159%和30%,同时溶剂吸附量下降了 46%。对于NR/PRGO硫化胶,拉伸强度和撕裂强度在PRGO含量为3份时达到最大,分别提高了 23%和150%,导热性能和耐溶剂性在PRGO含量为5份时达到最佳,导热系数提高了 30%,同时溶剂吸附量下降了 37%。研究了 GO对羧基丁腈橡胶(XNBR)和丁苯橡胶(SBR)共混胶的增容作用。结果表明:GO可以和XNBR形成氢键,同时通过π-π作用与SBR结合,有利于XNBR/SBR共混胶的相容性。仅添加0.3份的GO,XNBR/SBR共混胶的相容性得到了改善,玻璃化转变温度的差值缩小了 3 ℃。共混胶的拉伸强度和撕裂强度分别增加了 71%和94%,最大热分解温度提升了 10℃,同时耐溶剂性和导热性能也得到了提升。研究了 GO对不同共混比的XNBR/SBR共混物性能的影响。结果表明:GO能够均匀地分散在XNBR/SBR共混胶中,随着XNBR含量的增加,增强效果会显著提高。与未填充GO的XNBR/SBR(75/25)共混胶相比,添加3份的GO后,XNBR/SBR(75/25)共混胶的拉伸强度和撕裂强度分别增加了 58%和96%。NBR/SBR共混胶的耐溶剂性、导热性能和热稳定性也得到一定程度的提高。
[Abstract]:Graphene oxide (GOO) has attracted wide attention in academia and industry because of its excellent mechanical and barrier properties, high surface ratio, low cost and easy preparation. High performance rubber composites were prepared by adding go to rubber. The main results are as follows: go was modified by polyvinylpyrrolidone (PVP) to obtain GOGO modified by PVP, and then partially reduced to PRGO. Three series of natural rubber (NRN / GONR / PGO and NR/PRGO) were prepared by simple and environmentally friendly latex blending method. Vulcanizate. The modification mechanism of PGO and PRGO and their effects on the properties of rubber were studied. Compared with the unfilled NR vulcanizates, the tensile strength of the NR/PGO vulcanizates with 5 phr of PGO was higher than that of the unfilled NR vulcanizates. Tear strength and thermal conductivity increased by 81% and 30%, respectively, while the amount of solvent adsorption decreased by 46%. For NR/PRGO vulcanizate, the tensile strength and tear strength reached maximum when the content of PRGO was 3 phr. The thermal conductivity and solvent resistance were improved by 23% phr and 150 phr, respectively. When the content of PRGO was 5 phr, the thermal conductivity and solvent resistance reached the best. The thermal conductivity increased by 30% and the solvent adsorption decreased by 37%. The compatibilization effect of go on carboxylic acrylonitrile butadiene rubber (XNBR) and styrene-butadiene rubber (SBR) blends was studied. The results showed that XNBR could form hydrogen bond with XNBR and combine with SBR through 蟺-蟺 interaction. The compatibility of XNBR/SBR blends was improved by adding only 0.3 phr of GONBR / SBR blends. The difference of glass transition temperature was reduced by 3 鈩，

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