本文選題：碳納米管 + 碳化硅��； 參考：《南京理工大學(xué)》2017年碩士論文

【摘要】：近年來隨著社會的進(jìn)步,電子科技的日益革新,電子產(chǎn)品和電子設(shè)備的大量使用給人們生活帶來了便利的同時也帶來了電磁污染等環(huán)境問題。電磁污染不但影響著人們的健康,而且影響著其他電子設(shè)備的正常工作。電磁波吸收材料可以降低電磁污染所帶來的危害,同樣地在軍事領(lǐng)域電磁波吸收材料可以有效降低雷達(dá)對軍事設(shè)施的探測能力。吸波材料的設(shè)計主要根據(jù)其原理通過將入射的電磁波吸收和消耗來有效的降低電磁輻射所產(chǎn)生的危害。聚吡咯氣凝膠由于其質(zhì)量輕、吸波性能好等特點(diǎn)受到了廣泛的關(guān)注,但是其單獨(dú)作為吸波材料不能滿足所有環(huán)境下對材料的要求。本文以羧基碳納米管(MCNT-COOH)和碳化硅納米管(SiCNT)為研究對象來調(diào)控聚吡咯(PPy)氣凝膠,形成雜化的復(fù)合材料,然后對它們的電磁波吸收性能進(jìn)行研究。主要的工作有以下幾個方面。(1)MCNT-COOH和SiCNT分別調(diào)控PPy氣凝膠的制備過程。首先,利用文獻(xiàn)方法對碳納米管進(jìn)行羧基化處理,然后將得到的MCNT-COOH與吡咯單體不同比例混合,通過氧化吡咯單體形成羧基碳納米管/聚吡咯復(fù)合材料(MCNT-COOH@PPy)。再利用上述制備MCNT-COOH@PPy的方法制備出不同比例的碳化硅納米管/聚吡咯復(fù)合材料(SiCNT@PPy),最終得到具有不同微觀結(jié)構(gòu)形貌的氣凝膠。(2)為了進(jìn)一步弄清MCNT-COOH@PPy和SiCNT@PPy復(fù)合材料的形貌結(jié)構(gòu),本文采用掃描電鏡、透射電鏡、紅外光譜分析儀、拉曼光譜分析儀、X射線衍射分析儀、X射線光電子能譜儀等對得到的產(chǎn)物進(jìn)行表征分析。通過分析可知,吡咯單體優(yōu)先在MCNT-COOH和SiCNT表面聚合形成一層薄膜,然后在薄膜外繼續(xù)自組裝聚合形成含有上述兩種物質(zhì)的氣凝膠。(3)對上述制備的MCNT-COOH@PPy和SiCNT@PPy氣凝膠分別以不同比例與石蠟混合,然后利用矢量網(wǎng)絡(luò)分析儀進(jìn)行電磁參數(shù)測試,接著再對它們的介電性能和電磁波吸收性能進(jìn)行分析。通過分析可知MCNT-COOH@PPy和SiCNT@PPy均表現(xiàn)出優(yōu)異的電磁波吸收性能,最大的有效吸收寬度分別是6.12GHz和6.52GHz比純的聚吡咯寬很多,并且有吸波厚度薄、質(zhì)量輕、耐腐蝕等特點(diǎn)。因此,上述兩種產(chǎn)物可以作為很好的電磁波吸收材料。
[Abstract]:In recent years, with the progress of society and the increasingly innovation of electronic technology, the extensive use of electronic products and electronic equipment has brought convenience to people's lives, but also brought environmental problems such as electromagnetic pollution. Electromagnetic pollution not only affects people's health, but also affects the normal operation of other electronic devices. Electromagnetic wave absorbing materials can reduce the harm caused by electromagnetic pollution. Similarly in military field electromagnetic wave absorbing materials can effectively reduce radar detection ability to military facilities. The design of absorbing materials is mainly based on the principle of absorbing and consuming the incident electromagnetic wave to effectively reduce the harm caused by electromagnetic radiation. Polypyrrole aerogels have attracted much attention because of their light weight and good absorbing properties. However, as a kind of absorbing material alone, polypyrrole aerogels can not meet the requirements of materials in all environments. In this paper, carboxyl carbon nanotubes (MCNT-COOH) and silicon carbide nanotubes (SiCNT) were used to regulate polypyrrole pyrrolidine aerogels to form hybrid composites, and their electromagnetic wave absorption properties were studied. MCNT-COOH and SiCNT regulate the preparation of PPy aerogels respectively. Firstly, carbon nanotubes (CNTs) were treated by carboxylation method, then the MCNT-COOH was mixed with pyrrole monomers in different proportions to form carboxyl carbon nanotubes / polypyrrole composites by oxidation of pyrrole monomers. In order to further understand the morphology of MCNT-COOH@PPy and SiCNT@PPy composites, different proportions of silicon carbide nanotubes / polypyrrole composites were prepared by the method of preparing MCNT-COOH@PPy, and finally aerogels with different microstructure were obtained. The products were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), infrared spectroscopy (IR), Raman spectroscopy (Raman), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results show that the pyrrole monomer preferentially polymerizes on the surface of MCNT-COOH and SiCNT to form a thin film. The MCNT-COOH@PPy and SiCNT@PPy aerogels were mixed with paraffin in different proportions respectively, and then the electromagnetic parameters were tested by vector network analyzer. Then their dielectric properties and electromagnetic wave absorption properties are analyzed. The results show that both MCNT-COOH@PPy and SiCNT@PPy have excellent electromagnetic wave absorption performance. The maximum effective absorption width is that 6.12GHz and 6.52GHz are much wider than pure polypyrrole, and have the characteristics of thin absorbing thickness, light weight, corrosion resistance and so on. Therefore, the above two products can be used as good materials for electromagnetic wave absorption.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB383.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 劉琳;張東;;電磁屏蔽材料的研究進(jìn)展[J];功能材料;2015年03期

2 程岳超;趙曉明;王瑞;宋炳濤;;電磁屏蔽織物發(fā)展現(xiàn)狀及其屏蔽效能評價[J];輕紡工業(yè)與技術(shù);2013年01期

3 張月芳;郝萬軍;;吸波材料研究進(jìn)展及其對軍事隱身技術(shù)的影響[J];化工新型材料;2012年01期

4 肖鵬遠(yuǎn);焦曉寧;;電磁屏蔽原理及其電磁屏蔽材料制造方法的研究[J];非織造布;2010年05期

5 孟建華,楊桂琴,嚴(yán)樂美,王秀宇;吸波材料研究進(jìn)展[J];磁性材料及器件;2004年04期

6 熊國宣,鄧敏,宋碧濤,唐明述;納米材料在混凝土中應(yīng)用的思考[J];混凝土與水泥制品;2002年05期

7 馬仁志,朱艷秋,魏秉慶,梁吉,高志棟,吳德海;鐵-巴基管復(fù)合材料的研究[J];復(fù)合材料學(xué)報;1997年02期

，

本文編號：1929027