本文選題：廢舊輪胎橡膠粉 + 低溫等離子體　； 參考：《蘇州科技學(xué)院》2015年碩士論文

【摘要】：汽車產(chǎn)業(yè)的快速發(fā)展帶來的是廢舊輪胎報廢量的劇增,如何解決廢舊輪胎帶來的黑色污染,進(jìn)行資源回收再利用,對于開展循環(huán)經(jīng)濟(jì)和生態(tài)化工業(yè)具有十分重要的意義。廢舊輪胎是一項(xiàng)龐大的可再生資源,世界各國對它的資源化處理也越來越重視。低溫等離子體改性是近年來發(fā)展比較快的一種新型材料表面改性技術(shù)。經(jīng)過低溫等離子體改性的材料不會改變其本體性能,只是改變了其表面性能。在輝光放電條件下進(jìn)行低溫等離子體活化處理,使氣體部分或者全部離子化,包括電子、離子、光子和自由基等高能活性分子存在。而且根據(jù)選擇工作氣氛的不同,還可以對材料表面的物理化學(xué)結(jié)構(gòu)進(jìn)行目的性的改性。本文通過低溫等離子體對廢舊輪胎橡膠粉進(jìn)行活化處理,再經(jīng)過濕法工藝制備改性瀝青,研究活化膠粉對改進(jìn)瀝青性能的影響。文章創(chuàng)新性的采用低溫等離子體活化橡膠粉制備改性瀝青,為廢舊輪胎的資源化利用提供一條新思路。文章通對低溫等離子體活化膠粉表面進(jìn)行了較為完整的表征,采用傅里葉紅外光譜分析和掃描電子顯微鏡,對活化前后橡膠粉的官能團(tuán)和表面形貌進(jìn)行了較為詳細(xì)的分析;結(jié)果表明,經(jīng)過低溫等離子體活化的膠粉官能團(tuán)種類沒有發(fā)生明顯的變化,但是特定的官能團(tuán)含量有一定的變化,而且經(jīng)過活化的膠粉表面刻蝕效果非常明顯,膠粉的表面變的粗糙,以上結(jié)果表明低溫等離子體活化技術(shù)可以促進(jìn)膠粉與瀝青的物理共混,為提高改性瀝青的路用性能提供了理論基礎(chǔ)。實(shí)驗(yàn)以濕法工藝在高速剪切機(jī)條件下制備改性瀝青,通過三大指標(biāo)檢測、熱重差熱分析、布洛克菲爾得旋轉(zhuǎn)粘度計和動態(tài)剪切流變儀研究了改性瀝青的性能變化。結(jié)果表明改性瀝青的針入度、軟化點(diǎn)、延度和粘度都有很大改善,改性瀝青的高溫性能、低溫性能、溫度敏感性及溫度穩(wěn)定性都得到很大改善。差熱分析結(jié)果證明,經(jīng)過低溫等離子體活化制備的改性瀝青熱穩(wěn)定性增強(qiáng),膠粉摻量為15%~20%時改性效果最好。
[Abstract]:The rapid development of automobile industry has brought about a sharp increase in the amount of waste tires. How to solve the black pollution caused by waste tires and recycle resources is of great significance for the development of recycling economy and eco-chemical industry. Waste tire is a huge renewable resource, and more attention has been paid to its recycling treatment in the world. Low temperature plasma modification is a new material surface modification technology developed rapidly in recent years. The material modified by low temperature plasma does not change its bulk properties, but only its surface properties. Under the condition of glow discharge, the gas is partially or completely ionized by low temperature plasma activation, including electrons, ions, photons and free radicals, and so on. In addition, the physicochemical structure of the material surface can be modified purposefully according to the different working atmosphere. In this paper, waste tire rubber powder was activated by low temperature plasma, and modified asphalt was prepared by wet process. The effect of activated rubber powder on the performance of asphalt was studied. In this paper, the modified asphalt is prepared by using low temperature plasma activated rubber powder, which provides a new idea for the utilization of waste tires. The surface of rubber powder activated by low temperature plasma was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The functional groups and surface morphology of rubber powder before and after activation were analyzed in detail. The results show that the type of functional groups activated by low temperature plasma does not change obviously, but the content of specific functional groups changes to a certain extent, and the surface etching effect of activated rubber powder is very obvious. The results show that the low temperature plasma activation technology can promote the physical blending of rubber powder and asphalt and provide a theoretical basis for improving the pavement performance of modified asphalt. The modified asphalt was prepared by wet process under the condition of high speed shearing machine. The performance changes of modified asphalt were studied by means of three indexes, thermogravimetric differential thermal analysis (TGA), Bradford rotary viscometer and dynamic shear rheometer. The results show that the penetration, softening point, ductility and viscosity of modified asphalt have been greatly improved, and the high temperature performance, low temperature performance, temperature sensitivity and temperature stability of modified asphalt have been greatly improved. The results of differential thermal analysis show that the thermal stability of modified asphalt prepared by low temperature plasma activation is enhanced and the modification effect is the best when the content of rubber powder is 15 ~ 20.
【學(xué)位授予單位】：蘇州科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ522.65;X705

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