本文關(guān)鍵詞： 氧化石墨烯 石墨烯 天然橡膠 力學(xué)性能 導(dǎo)熱性能　出處：《南京理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：氧化石墨烯(GO)和石墨烯(GE)作為二維納米填料,具有優(yōu)異的力學(xué)性能和導(dǎo)熱性能,是橡膠補(bǔ)強(qiáng)填料的極佳選擇。但是GO和GE在橡膠中易于團(tuán)聚,影響其對(duì)橡膠的補(bǔ)強(qiáng)效果。本文選用聚乙烯吡咯烷酮(PVP)作為改性劑,對(duì)GO進(jìn)行改性,研究了改性GO(PGO)對(duì)天然橡膠(NR)、羧基丁腈橡膠(XNBR)、丁苯橡膠(SBR)的物理機(jī)械性能、熱穩(wěn)定性及導(dǎo)熱性能等的影響。研究結(jié)果表明:PVP的加入顯著改善了 GO在不同橡膠基體中的分散性能。對(duì)于NR基體,填充4份的PGO可使NR的拉伸強(qiáng)度達(dá)到26.65MPa,比NR空白膠提升了 55%。5份的PGO使NR的撕裂強(qiáng)度增加到51.36 kN/m,比NR空白膠提升了 159%,交聯(lián)密度提升了 170%,導(dǎo)熱系數(shù)提升了 26%。對(duì)于XNBR基體,3份PGO使XNBR的撕裂強(qiáng)度和導(dǎo)熱系數(shù)相比GO/XNBR分別提升了 54%和25%,而拉伸強(qiáng)度變化不大。在SBR基體中,填充3份PGO可使SBR的拉伸強(qiáng)度達(dá)到10.92 MPa,比SBR空白膠和GO/SBR分別提升493%和72%,導(dǎo)熱系數(shù)分別提高了 29%和14%。對(duì)PGO的進(jìn)一步還原制備了能夠在水中均勻分散的PVP改性GE(PGE)溶液,然后與NR膠乳進(jìn)行混合制備了 PGE/NR復(fù)合材料。隨著PGE填充量的增加,力學(xué)性能、熱穩(wěn)定性和導(dǎo)熱性能等不斷增加。當(dāng)PGE填充量為3份時(shí),PGE/NR的拉伸強(qiáng)度和撕裂強(qiáng)度分別比NR空白膠提升了 23%和146%,Tmax最大可提升9.8℃。此外,PGE/NR在-70℃和25℃時(shí)的儲(chǔ)能模量和導(dǎo)熱系數(shù)分別提升了 59%,313%和31%。
[Abstract]:As two dimensional nano-fillers, graphene oxide (GOO) and graphene (GE) have excellent mechanical properties and thermal conductivity, so they are the best choice for rubber reinforcing fillers, but go and GE are easy to agglomerate in rubber. In this paper, polyvinylpyrrolidone (PVP) was used as modifier to modify go. The physical and mechanical properties of modified GOPGOA on natural rubber, carboxylic acrylonitrile-butadiene rubber (XNBR) and styrene butadiene rubber (SBR) were studied. The results showed that the dispersity of go in different rubber matrix was significantly improved with the addition of 1: PVP. The tensile strength of NR reached 26.65 MPA after filling 4 phr of PGO, 55 parts of PGO increased the tear strength of NR to 51.36 KN / m, 159% of NR increased, crosslinking density increased 170% and thermal conductivity increased 26%. The tear strength and thermal conductivity of XNBR were increased by 54% and 25 parts of PGO compared with GO/XNBR, respectively, but the tensile strength did not change much. In SBR matrix, the tear strength and thermal conductivity of XNBR were increased by 54% and 25 parts, respectively. The tensile strength of SBR reached 10.92 MPA by filling 3 phr of PGO, which was 493% and 722 MPA higher than that of SBR and GO/SBR, respectively, and the thermal conductivity was increased by 29% and 14, respectively. The solution of PVP modified GEP was prepared by further reduction of PGO. Then the PGE/NR composites were prepared by mixing with NR latex. With the increase of PGE content, the mechanical properties were obtained. The tensile strength and tear strength of PGE / NR were increased by 23% and 146% Tmax, respectively, when the content of PGE was 3 phr. In addition, the energy storage of PGE / NR at -70 鈩，

本文編號(hào)：1538891