本文選題：紫外輻照 + 聚丙烯非織造布　； 參考：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：針對(duì)水中表面活性劑污染嚴(yán)重的問題,制備出表面具有親疏水端基的聚丙烯非織造布,并探究了功能化的非織造布對(duì)表面活性劑的吸附行為。本文首先采用紫外輻照接枝的方法將甲基丙烯酸縮水甘油酯(GMA)接枝到聚丙烯非織造布(PP)的表面,其次用不同碳鏈長(zhǎng)度(正丁胺或正辛胺或正十二胺)的胺與PP-g-GMA表面的環(huán)氧基團(tuán)進(jìn)行開環(huán)反應(yīng),制備出表面具有與表面活性劑分子相似結(jié)構(gòu)的非織造布(PP-g-GMA-BA,PP-g-GMA-OA,PP-g-GMA-LA)。并且探究了不同因素對(duì)非織造布表面改性的影響。通過傅立葉變換紅外光譜(FT-IR)、掃描電子顯微鏡(SEM)、光電子能譜(XPS)、激光共聚焦顯微鏡(CLSM)和接觸角(CA)對(duì)改性前后非織造布的結(jié)構(gòu)、形貌及其親水性能進(jìn)行了表征。探究了表面具有親疏水端基的非織造布對(duì)表面活性劑的吸附性能。結(jié)果表明,功能化的非織造布對(duì)表面活性劑的吸附效果明顯提高;而且非織造布表面疏水端基碳鏈長(zhǎng)度較長(zhǎng)的PP-g-GMA-LA對(duì)表面活性劑具有較好的吸附效果。最后,本文深入研究了膠束的形成對(duì)PP-g-GMA-LA吸附性能的影響。研究發(fā)現(xiàn)當(dāng)表面活性劑以分子的形態(tài)存在于溶液中時(shí),可以與PP-g-GMA-LA非織造布表面的親疏水位點(diǎn)形成氫鍵和范德華力,通過兩種作用力的協(xié)同作用對(duì)表面活性劑分子進(jìn)行吸附;當(dāng)表面活性劑以膠束的形態(tài)存在于溶液中時(shí),膠束是通過與非織造布內(nèi)部的宏觀孔結(jié)構(gòu)之間形成三維的空間作用力進(jìn)行吸附的。通過對(duì)PP-g-GMA-LA吸附表面活性劑的動(dòng)力學(xué)研究發(fā)現(xiàn),表面活性劑的吸附速率曲線符合準(zhǔn)二級(jí)動(dòng)力學(xué)曲線,表面活性劑分子與膠束在吸附過程中的控速步驟分別為分子內(nèi)的擴(kuò)散與表層之間的擴(kuò)散過程。
[Abstract]:In view of the serious pollution of surfactant in water, polypropylene nonwovens with hydrophilic end group were prepared, and the adsorption behavior of surfactant on functional nonwovens was investigated. In this paper, glycidyl methacrylate (GMA) was grafted onto the surface of PP (PP) by ultraviolet irradiation. Secondly, the nonwoven fabric PP-g-GMA-BAn PP-g-GMA-OAA with similar structure to surfactant molecules was prepared by ring-opening reaction of amines with different carbon chain lengths (n-butylamine or n-octylamine or n-dodecylamine) with epoxy groups on the surface of PP-g-GMA. The influence of different factors on surface modification of nonwovens was also explored. The structure, morphology and hydrophilicity of nonwovens before and after modification were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), photoelectron spectroscopy (XPS), laser confocal microscopy (CLSM) and contact angle (CAA). The adsorption of surfactants on nonwovens with hydrophobic end group was investigated. The results showed that the adsorption effect of surfactant was improved obviously by functionalized nonwovens, and PP-g-GMA-LA with long hydrophobic end group carbon chain on the surface of nonwovens had better adsorption effect on surfactants. Finally, the effect of micelle formation on the adsorption properties of PP-g-GMA-LA was studied. It is found that when surfactant exists in solution as molecular form, hydrogen bond and van der Waals force can be formed with the affinity water level point on the surface of PP-g-GMA-LA nonwovens, and the surfactant molecules can be adsorbed by the synergistic action of the two forces. When the surfactant exists in the solution in the form of micelles, the micelles are adsorbed by three-dimensional spatial forces formed between the macroporous structure of the nonwovens. By studying the kinetics of PP-g-GMA-LA adsorption surfactant, it is found that the adsorption rate curve of surfactant accords with the quasi-second-order kinetic curve. The velocity control steps of surfactant molecules and micelles in the adsorption process are intramolecular diffusion and intersurface diffusion respectively.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703

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本文編號(hào)：1915181