本文選題：硅橡膠 + MWNTs��； 參考：《青島科技大學(xué)》2015年碩士論文

【摘要】：隨著數(shù)據(jù)化時(shí)代的來(lái)臨,科學(xué)技術(shù)對(duì)于高度集成元器件的要求越來(lái)越高,這直接導(dǎo)致了對(duì)于高導(dǎo)熱材料的需求越來(lái)越迫切,而硅橡膠作為一種具備優(yōu)異性能的高彈性材料,其導(dǎo)熱性能也得到了廣泛研究。本課題以107雙組分縮合型硅橡膠為基膠,探究了交聯(lián)劑原硅酸乙酯和催化劑二丁基二月桂酸錫的加入量對(duì)無(wú)填充硅橡膠導(dǎo)熱率的影響,結(jié)果表明,當(dāng)二者加入量分別為3.6phr和10.9phr時(shí),硅橡膠的交聯(lián)密度最大,且導(dǎo)熱率最高,二者呈對(duì)應(yīng)關(guān)系。本文探究了不同溶劑對(duì)于碳納米管的分散性的影響,進(jìn)而制備MWNTs/107膠復(fù)合材料。結(jié)果表明,異丙醇對(duì)于碳納米管的分散性最好,且以異丙醇為溶劑制出的復(fù)合材料導(dǎo)熱率最高。為使Fe3O4粒子足量、均勻且牢固地附著于碳納米管表面,本文以溶劑熱反應(yīng)制備Fe3O4/MWNTs復(fù)合粒子。研究流程為先對(duì)MWNTs進(jìn)行了表面功能化處理,然后以溶劑熱法生成Fe3O4粒子并使其附著于MWNTs表面。TEM表征結(jié)果說(shuō)明,用SDS對(duì)酸化后的MWNTs進(jìn)行功能化處理,能提高M(jìn)WNTs在溶液中的分散性,并能使Fe3O4粒子最穩(wěn)定的附著于MWNTs表面,熱重分析實(shí)驗(yàn)證明,在使用SDS之后,MWNTs表面的Fe3O4粒子生成量也得到提高；當(dāng)用0.002mol的三價(jià)鐵鹽對(duì)0.1gMWNTs進(jìn)行包覆實(shí)驗(yàn)時(shí),所制得的當(dāng)Fe3O4粒子生成量較為理想,且粒徑適中。本文研究了MWNTs對(duì)于107硅橡膠復(fù)合材料導(dǎo)熱率的影響。當(dāng)MWNTs管徑大于60nm時(shí),復(fù)合材料導(dǎo)熱率隨MWNTs填充量增大而一直呈上升趨勢(shì)；而當(dāng)MWNTs管徑小于60nm時(shí),且填充量為4phr時(shí),MWNTs在硅膠基體中出現(xiàn)團(tuán)聚,導(dǎo)熱網(wǎng)絡(luò)受到破壞,復(fù)合材料導(dǎo)熱率會(huì)出現(xiàn)下降趨勢(shì),而隨著填充量的繼續(xù)增多,導(dǎo)熱網(wǎng)絡(luò)得到完善,導(dǎo)熱率開(kāi)始增大。本文研究了取向MWNTs對(duì)于107硅橡膠復(fù)合材料導(dǎo)熱率的影響,與非取向MWNTs相比,其對(duì)于復(fù)合材料導(dǎo)熱率的提升更為明顯,由于取向碳納米管在硅橡膠基體中的分散性得到改善,團(tuán)聚現(xiàn)象減弱,所以隨著填充份數(shù)的增加,沒(méi)有出現(xiàn)導(dǎo)熱率下降的現(xiàn)象。
[Abstract]:With the advent of data age, the requirement of high integrated components is becoming more and more high, which directly leads to the urgent need for high thermal conductivity materials, and silicone rubber as a kind of high elastic material with excellent performance.Its thermal conductivity has also been extensively studied.Based on 107 binomial condensed silicone rubber, the effect of crosslinking agent, ethyl orthosilicate, and catalyst 2 Ding Ji on the thermal conductivity of unfilled silicone rubber was studied.When 3.6phr and 10.9phr were added, the crosslinking density of silicone rubber was the highest and the thermal conductivity was the highest.In this paper, the influence of different solvents on the dispersion of carbon nanotubes (CNTs) was investigated, and the MWNTs/107 composite was prepared.The results show that isopropanol has the best dispersion to carbon nanotubes and the thermal conductivity of composites prepared with isopropanol as solvent is the highest.In order to make the Fe3O4 particles adhere to the carbon nanotube surface uniformly and firmly, the Fe3O4/MWNTs composite particles were prepared by solvothermal reaction.The surface functionalization of MWNTs was carried out first, and then Fe3O4 particles were formed by solvothermal method and attached to MWNTs surface. The results showed that SDS functionalization of MWNTs after acidification could improve the dispersion of MWNTs in solution.The results of thermogravimetric analysis show that the amount of Fe3O4 particles on the surface of Fe3O4 is also increased after the use of SDS, and that when the trivalent ferric salts of 0.002mol are used in the coating experiment of 0.1gMWNTs,The yield of Fe3O4 particles is ideal and the particle size is moderate.The effect of MWNTs on the thermal conductivity of 107 silicone rubber composites was studied in this paper.When the diameter of MWNTs pipe is larger than that of 60nm, the thermal conductivity of composite material increases with the increase of MWNTs content, but when the diameter of MWNTs pipe is smaller than 60nm, and the content of 4phr is less than 4phr, the thermal conductivity network is destroyed.The thermal conductivity of composites will decrease, but with the increase of the filling amount, the thermal conductivity network will be improved and the thermal conductivity will increase.In this paper, the effect of oriented MWNTs on the thermal conductivity of 107silicone rubber composites is studied. Compared with non-oriented MWNTs, the thermal conductivity of the composites is increased more obviously, and the dispersion of oriented carbon nanotubes in silicone rubber matrix is improved.The agglomeration decreases, so there is no decrease in thermal conductivity with the increase of filling fraction.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB332

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相關(guān)期刊論文 前2條

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本文編號(hào)：1764246