本文選題：氧化石墨烯　切入點：橡膠　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：氧化石墨烯(GO)由于其具有優(yōu)異的力學(xué)和阻隔性能、比表面大、成本低、易制備等優(yōu)點,在學(xué)術(shù)界和工業(yè)界引起了廣泛的重視。在本文研究中,將GO添加到橡膠中制備高性能的橡膠復(fù)合材料,主要研究結(jié)果如下:采用聚乙烯吡咯烷酮(PVP)改性GO得到PVP改性的GO(PGO),然后進(jìn)一步部分還原得到PRGO。采用簡單而且環(huán)保的膠乳共混法制備了三種系列的天然橡膠(NR)/GO,NR/PGO和NR/PRGO硫化膠。研究了 PGO和PRGO的改性機理及其對橡膠性能的影響。結(jié)果表明,PVP分子與GO發(fā)生氫鍵相互作用,而PVP分子通過非共價相互作用吸附在RGO的基面。與未填充填料的NR硫化膠相比,添加5份PGO的NR/PGO硫化膠的拉伸強度、撕裂強度和導(dǎo)熱系數(shù)分別提高了 81%、159%和30%,同時溶劑吸附量下降了 46%。對于NR/PRGO硫化膠,拉伸強度和撕裂強度在PRGO含量為3份時達(dá)到最大,分別提高了 23%和150%,導(dǎo)熱性能和耐溶劑性在PRGO含量為5份時達(dá)到最佳,導(dǎo)熱系數(shù)提高了 30%,同時溶劑吸附量下降了 37%。研究了 GO對羧基丁腈橡膠(XNBR)和丁苯橡膠(SBR)共混膠的增容作用。結(jié)果表明:GO可以和XNBR形成氫鍵,同時通過π-π作用與SBR結(jié)合,有利于XNBR/SBR共混膠的相容性。僅添加0.3份的GO,XNBR/SBR共混膠的相容性得到了改善,玻璃化轉(zhuǎn)變溫度的差值縮小了 3 ℃。共混膠的拉伸強度和撕裂強度分別增加了 71%和94%,最大熱分解溫度提升了 10℃,同時耐溶劑性和導(dǎo)熱性能也得到了提升。研究了 GO對不同共混比的XNBR/SBR共混物性能的影響。結(jié)果表明:GO能夠均勻地分散在XNBR/SBR共混膠中,隨著XNBR含量的增加,增強效果會顯著提高。與未填充GO的XNBR/SBR(75/25)共混膠相比,添加3份的GO后,XNBR/SBR(75/25)共混膠的拉伸強度和撕裂強度分別增加了 58%和96%。NBR/SBR共混膠的耐溶劑性、導(dǎo)熱性能和熱穩(wěn)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，

本文編號：1636879