本文關(guān)鍵詞： 多壁碳納米管 硅橡膠 溶液共混 協(xié)同改性 介電常數(shù)　出處：《絕緣材料》2017年02期 　論文類(lèi)型：期刊論文

【摘要】：以硬脂酸(SA)和鋁酸酯(ACA)為改性劑,十二烷基苯磺酸鈉(SDBS)為表面活性劑對(duì)多壁碳納米管(MWCNTs)進(jìn)行協(xié)同改性。然后以改性碳納米管為填料,硅橡膠(SR)為基體,通過(guò)溶液共混方法制備了MWCNTs/SR復(fù)合材料,研究協(xié)同改性對(duì)MWCNTs/SR復(fù)合材料性能的影響。由SEM表征可知,協(xié)同改性后碳納米管在復(fù)合材料中的分散性得到改善。通過(guò)TGA表征發(fā)現(xiàn),碳納米管經(jīng)協(xié)同改性之后能顯著提高復(fù)合材料的熱穩(wěn)定性,與未改性MWCNTs/硅橡膠復(fù)合材料相比,其分解溫度(T(onset))由438.9℃提高到473.2℃。在100 Hz條件下,MWCNTs/SR復(fù)合材料的介電常數(shù)由270增至970,增幅高達(dá)259%。經(jīng)協(xié)同改性制備的復(fù)合材料具有更高的介電常數(shù),且介質(zhì)損耗基本不變。
[Abstract]:Stearic acid (SA) and aluminate (ACAA) were used as modifiers. 12 sodium alkylbenzenesulfonate (SDBS) was used as surfactant to modify MWCNTsof multi-walled carbon nanotubes (MWCNTs), and then modified carbon nanotubes (CNTs) were used as fillers and silicone rubber (SDBs) as matrix. MWCNTs/SR composites were prepared by solution blending method, and the effects of co-modification on the properties of MWCNTs/SR composites were studied. The dispersion of carbon nanotubes in the composites was improved after co-modification. TGA characterization showed that the thermal stability of the composites could be significantly improved by co-modification of carbon nanotubes. Compared with unmodified MWCNTs/ silicone rubber composites, the decomposition temperature of MWCNTs/ silicone rubber composites was increased from 438.9 鈩，

本文編號(hào)：1472576