本文選題：埃洛石納米管 + 有機嫁接改性　； 參考：《天津大學》2015年碩士論文

【摘要】：2006年,美國Natural Nano公司率先報道了埃洛石納米管在橡膠領域表現(xiàn)出優(yōu)良性能,從而引發(fā)了對該類材料研究的熱潮。進一步研究表明該類納米管材料不僅在橡膠領域表現(xiàn)出優(yōu)良性能,而且還在吸附、存儲、輸運、催化、復合材料、氣體分離等方面展現(xiàn)出優(yōu)良的特色。另外,眾多研究顯示該類納米管在很大程度上與碳納米管具有一定的相似性,而該類納米管相對于碳納米管有較高的存儲量,從而成為可替代碳納米管的最具潛力的納米材料。有機改性是提升孔道類材料性能的有效方法。研究表明經過有機改性的埃洛石納米管在吸附水中重金屬離子及其他污染物方面表現(xiàn)出優(yōu)良性能,但是,對于有機改性對埃洛石納米管孔結構的影響及吸附脫硫性能研究較少。因此,本文首先選擇苯基磷酸與酚醛樹脂作為改性劑,通過直接鍵合和包覆的方法獲得改性的埃洛石納米管,考察了不同基團對納米管孔結構和脫硫性能的影響;其次,通過后嫁接合成法獲得表面氨基化與羧基化的改性埃洛石納米管,考察不同表面基團對埃洛石納米管表面酸性的影響及其吸附脫硫性能;最后,通過后嫁接合成法利用3-氨丙基三乙氧基作為改性劑獲得系列氨基埃洛石納米管,考察了嫁接方式、氨基濃度、氨基層數(shù)對埃洛石納米管孔結構的影響及其吸附脫硫性能。研究顯示,改性劑的選擇對埃洛石納米管的改性至關重要,不合適的改性劑破壞了改性載體管狀結構或堵塞管內腔,內孔減少,使孔隙率降低,不利于吸附脫硫。不同嫁接表面基團對埃洛石納米管的表面酸性位具有一定的影響,埃洛石納米管表面中強酸酸性位有利于吸附脫硫。氨基的嫁接方式、濃度、層數(shù)對埃洛石納米管孔結構和脫硫性能具有一定的影響。經過有機嫁接改性,埃洛石納米管管外表面與管內腔形成空間網狀結構,增大了埃洛石納米管的孔容,有利于吸附脫硫。
[Abstract]:In 2006, Natural Nano Company of the United States first reported the excellent properties of Ellowstone nanotubes in the rubber field, which led to the upsurge in the research of this kind of materials. Further studies show that this kind of nanotube materials not only exhibit excellent properties in rubber field, but also exhibit excellent characteristics in adsorption, storage, transport, catalysis, composite materials, gas separation and so on. In addition, many studies show that this kind of nanotubes are similar to carbon nanotubes to a great extent, and they have higher storage capacity than carbon nanotubes, so they become the most potential materials to replace carbon nanotubes. Organic modification is an effective method to improve the properties of porous materials. The results show that the organically modified Elosite nanotubes exhibit excellent properties in the adsorption of heavy metal ions and other pollutants in water, but there are few studies on the effect of organic modification on the pore structure and adsorption desulfurization performance of Elosite nanotubes. Therefore, Phenylphosphoric acid and phenolic resin were selected as modifiers to obtain the modified Elosterite nanotubes by direct bonding and coating, and the effects of different groups on the pore structure and desulfurization properties of the nanotubes were investigated. The surface amination and carboxylation of modified Elosite nanotubes were obtained by post-grafting synthesis. The effects of different surface groups on the surface acidity and their adsorption and desulfurization properties were investigated. A series of aminoethoxy nanotubes were prepared by post-grafting synthesis using 3-aminopropyl triethoxy as modifier. The effects of grafting mode, amino concentration and number of amino layers on pore structure and adsorption desulfurization performance were investigated. The results show that the selection of modifier is very important to the modification of Ellosite nanotubes, and the improper modifier destroys the tubular structure of the modified carrier or blocks the inner cavity of the tube, reduces the internal pores, reduces the porosity, and is not conducive to adsorption and desulphurization. Different grafted surface groups have a certain effect on the surface acidity of Elosite nanotubes, and the strong acid acidic sites on the surface of Ellosite nanotubes are favorable to the adsorption and desulphurization. The grafting mode, concentration and number of layers of amino groups have a certain effect on the pore structure and desulfurization performance of Ellosite nanotubes. After the organic grafting modification, the outer surface of the Elosterite nanotubes and the inner cavity of the tubes formed a space network structure, which increased the pore volume of the Elosite nanotubes and was conducive to the adsorption and desulfurization of the tubes.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE624.55;TB383.1

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