本文選題：聚丙烯無(wú)紡布 + 紫外光固化��； 參考：《浙江理工大學(xué)》2017年碩士論文

【摘要】：聚丙烯(PP)無(wú)紡布具有良好的透氣性、極低的回潮率、耐磨損、耐酸堿、產(chǎn)量大、成本低和強(qiáng)力高等優(yōu)點(diǎn),可作為過(guò)濾材料應(yīng)用于水處理領(lǐng)域。然而聚丙烯分子沒(méi)有任何親水基團(tuán),PP纖維截面為圓形且表面缺少微孔的特點(diǎn),導(dǎo)致聚丙烯無(wú)紡布具有極強(qiáng)的惰性和疏水性,使其在水處理過(guò)程中極易經(jīng)受污染,造成聚丙烯無(wú)紡布的通量降低以及分離能力下降等問(wèn)題,限制了其在水處理領(lǐng)域中的應(yīng)用。所以,提高聚丙烯無(wú)紡布的親水性是其在水處理領(lǐng)域中被推廣的重要途徑之一。本文采用紫外光固化的方法,將紫外光親水涂料固化到PP無(wú)紡布表面及孔隙壁上,提高其親水性能。本文將紫外光固化親水涂料,成分包括反應(yīng)性低聚物(改性丙烯酸樹(shù)脂)、親水單體(甲基丙烯酸羥乙酯(HEMA)、聚乙二醇(400)二丙烯酸酯(PEG(400)DA)或者三羥甲基丙烷三丙烯酸酯(TMPTA))、光引發(fā)劑(1-羥基環(huán)己基苯甲酮(184))和溶劑(己酸乙酯),經(jīng)紫外光照射,在聚丙烯無(wú)紡布上固化,形成親水膜,提高聚丙烯無(wú)紡布的親水性。采用場(chǎng)發(fā)射掃描電子顯微鏡、傅里葉紅外變換光譜儀、X射線光電子能譜儀、壓汞儀、接觸角測(cè)試儀以及自制水通量測(cè)試儀等對(duì)改性前后的PP無(wú)紡布結(jié)構(gòu)、化學(xué)組成以及性能等進(jìn)行表征。具體研究?jī)?nèi)容及結(jié)論如下:1)采用單官能團(tuán)親水單體HEMA和丙烯酸樹(shù)脂在PP無(wú)紡布表面固化交聯(lián)形成親水層。實(shí)驗(yàn)結(jié)果表明:通過(guò)實(shí)驗(yàn)優(yōu)化得出PP無(wú)紡布親水改性適宜條件為,丙烯酸樹(shù)脂、HEMA和184質(zhì)量分?jǐn)?shù)分別為7%,13%和1%,乙酸乙酯質(zhì)量分?jǐn)?shù)為79%;改性后的PP無(wú)紡布纖維略有加粗;改性PP無(wú)紡布膜表面引入了親水基團(tuán)-OH和-COO-,由原表面接觸角126.47°降為改性后的59.86°,水通量為35442 L/(m2·h);5次水洗后,改性后的PP無(wú)紡布具有優(yōu)良的親水持久性;采用親水改性的PP無(wú)紡布對(duì)泥漿水進(jìn)行過(guò)濾處理,周期內(nèi)水通量初始值略有降低,具有較好的抗污染性能;酸堿溶液浸泡處理后,改性后的PP無(wú)紡布表面接觸角略有升高,具有良好的耐酸堿性能。2)采用二官能團(tuán)親水單體PEG(400)DA和丙烯酸樹(shù)脂,在紫外光照射下在PP無(wú)紡布表面形成三維網(wǎng)狀親水層。實(shí)驗(yàn)結(jié)果表明:實(shí)驗(yàn)優(yōu)化后得到最佳親水改性劑成分配比為,丙烯酸樹(shù)脂、PEG(400)DA和184質(zhì)量分?jǐn)?shù)分別為7%,13%和1%,乙酸乙酯質(zhì)量分?jǐn)?shù)為79%;改性后PP無(wú)紡布纖維略有變粗;改性PP無(wú)紡布表面引入了大量的親水基團(tuán)-C-O-C和-COO-,由原無(wú)紡布的表面接觸角126.47°降到親水改性后的51.93°,水通量增加為36274.13 L/(m2·h);經(jīng)過(guò)5次水洗后,周期內(nèi)水通量初始值幾乎相同,親水穩(wěn)定性良好;改性后的PP無(wú)紡布對(duì)泥沙混合廢水進(jìn)行過(guò)濾,周期初始值呈略微下降趨勢(shì),說(shuō)明具有良好的抗污染性能;經(jīng)過(guò)酸堿溶液浸泡實(shí)驗(yàn)后,接觸角基本保持不變,說(shuō)明改性PP無(wú)紡布耐酸堿性能優(yōu)良。3)采用三官能團(tuán)親水單體TMPTA和丙烯酸樹(shù)脂,用紫外光固化技術(shù),使其在PP無(wú)紡布表面固化交聯(lián),提高其親水性能。實(shí)驗(yàn)結(jié)果表明:丙烯酸樹(shù)脂、PEG(400)DA和184質(zhì)量分?jǐn)?shù)分別為7%,13%和1%,乙酸乙酯質(zhì)量分?jǐn)?shù)為79%為親水改性劑的適宜配比,對(duì)PP無(wú)紡布親水改性效果達(dá)到最優(yōu);親水改性后的PP無(wú)紡布,纖維變粗;改性后的PP無(wú)紡布表面引入了大量的-COO-親水基團(tuán),使PP無(wú)紡布親水性能提高,接觸角由126.47°降到54.43°,水通量增加為35163.96 L/(m2·h);經(jīng)過(guò)5次水洗測(cè)試后,改性PP無(wú)紡布水通量基本保持不變,具有良好的親水持久性;改性PP無(wú)紡布過(guò)濾泥沙混合廢水,水通量周期初始值基本保持不變,抗污染性能良好;采用酸堿溶液浸泡改性的PP無(wú)紡布,表面接觸角略有升高,說(shuō)明其耐酸堿性能良好。
[Abstract]:Polypropylene (PP) non-woven fabric has good air permeability, low moisture regain, abrasion resistance, acid and alkali, high yield, low cost and high strength. It can be used as a filter material in water treatment. However, polypropylene has no hydrophilic groups, PP fiber section is round and surface lacks micropores, leading to polypropylene non-woven fabric. It has very strong inertia and hydrophobicity, which makes it very easy to be polluted in the process of water treatment, resulting in the reduction of the flux of polypropylene non-woven fabric and the decline of the separation capacity, which limits its application in the field of water treatment. Therefore, it is one of the important ways to improve the hydrophilicity of polypropylene non-woven fabric in the field of water treatment. UV curable coating is used to solidify the UV hydrophilic coating on the surface and pore wall of PP non-woven fabric to improve its hydrophilic properties. The UV curable hydrophilic coatings, including reactive oligomers (modified acrylic resin), hydrophilic monomers (HEMA), polyethylene glycol (400) two acrylate (40) (40), are used in this paper. 0) DA) or three hydroxymethyl propane three acrylate (TMPTA)), photoinitiator (1- hydroxycyclohexyl benzophenone (184)) and solvent (ethyl hexanoate), solidified on polypropylene nonwoven fabric through ultraviolet light, forming a hydrophilic membrane and improving the hydrophilicity of polypropylene non-woven fabric. Field emission scanning electron microscopy, Fourier transform infrared spectrometer, X injection are used. The structure, chemical composition and properties of the modified PP non-woven fabric before and after modification were characterized by linear photoelectron spectrometer, mercury pressure meter, contact angle tester, and self-made water flux tester. The specific contents and conclusions are as follows: 1) the formation and crosslinking of mono functional group of hydrophilic monomers HEMA and acrylic resin on the surface of PP non-woven fabric to form hydrophilic layer. The experimental results show that the optimum conditions for the hydrophilic modification of PP non-woven fabric are obtained through experimental optimization, the mass fraction of acrylic resin, HEMA and 184 is 7%, 13% and 1%, the ethyl acetate mass fraction is 79%, the modified PP non-woven fabric is slightly thickened, the surface of the modified PP non-woven fabric film is introduced into the hydrophilic group -OH and -COO-, from the original surface contact angle of 126.47 degrees. The water flux was reduced to 59.86 degrees after the modification, and the water flux was 35442 L/ (m2. H). After the 5 water washing, the modified PP non-woven fabric had excellent hydrophilic durability, and the hydrophilic modified PP non-woven fabric was used to filter the mud water. The initial value of the water flux in the period was slightly reduced, and the anti pollution performance was better. After soaking in the acid base solution, the modified PP was made. The surface contact angle of non-woven fabric is slightly higher, with good acid and alkali resistance.2) using two functional group of hydrophilic monomers PEG (400) DA and acrylic resin. Under UV irradiation, a three dimensional reticular hydrophile layer on the surface of PP non-woven fabric is formed. The experimental results show that the optimum composition of the hydrophilic modifier is, acrylic resin, PEG (400). The mass fraction of DA and 184 was 7%, 13% and 1%, and the ethyl acetate content was 79%, and the modified PP nonwoven fabric was slightly thickened; the surface of the modified PP non-woven fabric introduced a large number of hydrophilic groups -C-O-C and -COO-, from the surface contact angle of the original non-woven fabric to 51.93 degrees after the hydrophilic modification, and the water flux increased to 36274.13 L/ (m2. H); after 5 times, the PP non-woven fabric had 5 times (m2. H). After water washing, the initial value of the water flux in the cycle is almost the same and the hydrophilic stability is good. The modified PP non-woven fabric filters the mixed wastewater. The initial value of the cycle decreases slightly, indicating that it has a good anti pollution performance. After the acid alkali solution immersion experiment, the contact angle remains unchanged, indicating that the modified PP non-woven fabric is resistant to acid and alkali. Good performance.3) using three functional group of hydrophilic monomer TMPTA and acrylic resin, using UV curing technology to solidify and crosslink on the surface of PP non-woven fabric and improve its hydrophilic properties. The experimental results show that the mass fraction of acrylic resin, PEG (400) DA and 184 is 7%, 13% and 1% respectively, and the ethyl acetate mass fraction is 79% as the hydrophilic modifier. The hydrophilic modification effect of the PP non-woven fabric is the best, the PP non woven fabric after the hydrophilic modification and the fiber thickening, the modified PP non-woven fabric surface introduces a large number of -COO- hydrophilic groups, which makes the hydrophilic property of PP non-woven fabric improved, the contact angle is reduced from 126.47 to 54.43 degrees, and the water flux increases to 35163.96 L/ (m2. H). After 5 times of water washing test, the modified PP is no more. The water flux of the spun fabric remains unchanged and has a good hydrophilic durability. The modified PP non-woven fabric filter silt mixed wastewater, the initial value of the water flux period is basically kept unchanged, the anti pollution performance is good, and the surface contact angle of the modified PP non-woven fabric soaked with acid and alkali solution is slightly higher, indicating that its acid and alkali resistance is good.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TS195.2

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