本文選題：碳納米管 + 天然橡膠��； 參考：《北京化工大學(xué)》2015年碩士論文

【摘要】：碳納米管因其具優(yōu)異的導(dǎo)電、導(dǎo)熱性能同時兼具出色的物理機(jī)械性能,因此成為了理想的填充補(bǔ)強(qiáng)材料。在碳納米管成為理想填充材料的同時也掀起了研究碳納米管與橡膠界面熱潮,但是關(guān)于界面的研究至今沒有得出統(tǒng)一定論。一方面為了更全面更科學(xué)的研究碳納米管與天然橡膠界面作用,另一方面探索碳納米管與天然橡膠作用的影響因素,我們進(jìn)行了以下四方面研究：1.研究了F9000碳納米管與天然橡膠之間的相互作用。結(jié)果發(fā)現(xiàn),添加5份F9000碳納米管時結(jié)合膠的含量與添加50份炭黑N330的一樣,并且結(jié)合膠都是由松散結(jié)合和緊密結(jié)合構(gòu)成。低場核磁說明在結(jié)合膠中橡膠分子鏈活動受限,而緊密結(jié)合膠中的分子鏈活動受限程度高于松散結(jié)合膠。對于結(jié)合膠的SEM表征中也發(fā)現(xiàn)在碳納米管表面包覆有厚度約13nm的橡膠層,經(jīng)過抽提后該層橡膠厚度減少至8nm。進(jìn)一步通過紅外光譜和Raman光譜的研究顯示NR分子與F9000碳管之間存在CH-π相互作用。2.通過HR-TEM、Raman和XPS對F9000碳納米管進(jìn)行分析。研究表明F9000碳納米管含有較多的缺陷結(jié)構(gòu),碳納米管壁上存在大量石墨結(jié)晶的斷層、錯層結(jié)構(gòu)。XPS分析表明F9000碳納米管表面的O1s含量約4%,主要是OH基團(tuán)。據(jù)此提出了F9000與橡膠之間的三種作用機(jī)理：(a)NR大分子與碳納米管壁表面錯層、斷層缺陷間的拓?fù)涫芟拮饔茫?2)NR大分子與碳納米管表面含氧基團(tuán)的反應(yīng)形成化學(xué)吸附；(3)NR大分子鏈在碳納米管上纏繞。3.研究了碳納米管的結(jié)構(gòu)參數(shù)與界面結(jié)合強(qiáng)度(結(jié)合膠)之間的關(guān)系。結(jié)果發(fā)現(xiàn)：碳納米管的ID/IG越高,其與NR形成的結(jié)合膠含量越高,即石墨上缺陷越多,界面結(jié)合強(qiáng)度越高；NR/MWNTs復(fù)合材料的定伸強(qiáng)度與碳納米管的ID/IG基本成線性關(guān)系.4.選取F7000、F9000和GM3三種碳納米管加入橡膠中,研究了碳納米管用量與力學(xué)、體積電阻率和導(dǎo)熱率的關(guān)系。在同樣填充量時,表面缺陷較多的F7000碳納米管束對于橡膠增強(qiáng)最好,力學(xué)、導(dǎo)電性和導(dǎo)熱性性能最好,F9000次之,表面缺陷少的GM3最差。
[Abstract]:Carbon nanotubes (CNTs) have become an ideal filling and reinforcing material because of their excellent conductivity, thermal conductivity and excellent physical and mechanical properties. Carbon nanotubes (CNTs) have become the ideal filling materials, but the research on the interface between CNTs and rubber has not reached a unified conclusion. On the one hand, in order to study the interaction between CNTs and natural rubber more comprehensively and scientifically, on the other hand, we studied the following four aspects: 1. The interaction between F 9000 carbon nanotubes and natural rubber was studied. The results showed that the content of binding adhesive with 5 phr F9000 carbon nanotubes was the same as that with 50 phr carbon black N330, and the binding adhesive was composed of loose and compact bonding. The low field NMR shows that the molecular chain activity of rubber is limited in the binding adhesive, but the restriction degree of the molecular chain activity in the tight binding adhesive is higher than that in the loose binding adhesive. For the SEM characterization of the adhesive, it was also found that the rubber layer with a thickness of about 13nm was coated on the surface of the CNTs, and the thickness of the rubber layer was reduced to 8 nm after extraction. The results of IR and Raman spectra showed that there was CH- 蟺 interaction between NR molecule and F9000 carbon tube. F9000 carbon nanotubes were analyzed by HR-TEMN Raman and XPS. The results show that F9000 carbon nanotubes contain many defective structures, and there are a lot of graphite crystal faults on the carbon nanotubes wall. XPS analysis shows that the O1s content on the surface of F9000 carbon nanotubes is about 4%, mainly OH group. Based on this, three mechanisms of interaction between F9000 and rubber were proposed. The surface staggered layer of NR macromolecule and carbon nanotube wall was proposed. Topological confinement effect between fault defects the reaction of Na-2NR macromolecules with oxygen-containing groups on the surface of carbon nanotubes (CNTs) resulted in the formation of chemisorbed nitrile-containing macromolecular chains entwined on carbon nanotubes (CNTs) .3. The relationship between the structural parameters of carbon nanotubes (CNTs) and the interfacial bonding strength (adhesive) was studied. The results show that the higher the ID/IG content of CNTs is, the higher the binding adhesive content between CNTs and NR is, that is, the higher the defects on graphite, the higher the interfacial bonding strength of CNTs / MWNTs composites, and the linear relationship between the tensile strength of CNTs and the ID/IG of CNTs. Three kinds of carbon nanotubes (F7000F9000 and GM3) were added to the rubber to study the relationship between the content of CNTs and mechanics, volume resistivity and thermal conductivity. At the same filling amount, the F7000 carbon nanotube bundle with more surface defects is the best for rubber reinforcement, the mechanical, electrical and thermal conductivity is the best than F9000, and the GM3 with less surface defects is the worst.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB332;TQ332

【共引文獻(xiàn)】

相關(guān)期刊論文 前1條

1 Tan Xiao;Juqing Liu;Huifang Xiong;;EFFECTS OF DIFFERENT FUNCTIONALIZATION SCHEMES ON THE INTERFACIAL STRENGTH OF CARBON NANOTUBE POLYETHYLENE COMPOSITE[J];Acta Mechanica Solida Sinica;2015年03期

相關(guān)博士學(xué)位論文 前5條

1 詹迎青;多壁碳納米管的表面修飾與聚芳醚腈復(fù)合材料[D];電子科技大學(xué);2013年

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相關(guān)碩士學(xué)位論文 前7條

1 劉晨宇;MWCNT/Fe_3O_4/PANI/Au異質(zhì)結(jié)構(gòu)復(fù)合物的制備及吸波性能研究[D];哈爾濱工業(yè)大學(xué);2013年

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3 閻亭亭;碳納米管增強(qiáng)氧化鋁陶瓷復(fù)合材料界面力學(xué)性能研究[D];齊魯工業(yè)大學(xué);2013年

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5 吳思武;橡膠/納米碳素復(fù)合材料的分散與界面研究[D];華南理工大學(xué);2014年

6 張祥;氧化鐵修飾碳納米管對硅橡膠熱氧穩(wěn)定性的影響及機(jī)理探究[D];天津大學(xué);2014年

7 錢榮;聚合物基導(dǎo)熱復(fù)合材料的制備與絕緣性能研究[D];上海交通大學(xué);2014年

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本文編號：1886466