本文選題：聚丙烯腈　切入點(diǎn)：編織管　出處：《天津工業(yè)大學(xué)》2016年博士論文

【摘要】：本文以二維編織技術(shù)制備中空管狀纖維織物(編織管)作為增強(qiáng)體,聚丙烯腈(PAN)為聚合物表面分離層,用溶液相轉(zhuǎn)化法在編織管表面復(fù)合PAN表面分離層,制備同質(zhì)編織管增強(qiáng)型PAN中空纖維膜,研究聚合物濃度、添加劑、紡絲工藝條件等對(duì)膜結(jié)構(gòu)及性能影響；采用編織管增強(qiáng)法分別制備了異質(zhì)增強(qiáng)型PVDF/PAN(編織管)及PAN/PET(編織管)中空纖維膜,并對(duì)增強(qiáng)型中空纖維膜界面結(jié)合性能進(jìn)行了研究；分別以具有優(yōu)良親水性能的醋酸纖維素(CA)與PAN共混,以氧化石墨烯(GO)為添加劑摻雜改性表面分離層,研究了表面分離層改性后的增強(qiáng)型PAN中空纖維膜結(jié)構(gòu)和性能；將同質(zhì)增強(qiáng)膜用于膜生物反應(yīng)器(MBR),研究其在MBR試驗(yàn)過程中的應(yīng)用可行性及膜抗污染性能。利用同質(zhì)材料間良好的熱力學(xué)相容性、共溶劑性,以PAN中空編織管為增強(qiáng)體,PAN為聚合物表面分離層,制備了同質(zhì)編織管增強(qiáng)型PAN中空纖維膜。研究發(fā)現(xiàn),鑄膜液中溶劑對(duì)編織管的纖維表面產(chǎn)生溶脹、溶解作用,使得增強(qiáng)膜具有良好的界面結(jié)合性能,所得增強(qiáng)型PAN中空纖維膜斷裂強(qiáng)度大于75MPa,當(dāng)聚合物濃度為10-12wt.%,PVP含量8 wt.%時(shí),同質(zhì)編織管增強(qiáng)型PAN中空纖維膜結(jié)構(gòu)和性能較優(yōu)。以聚酯纖維(PET)長(zhǎng)絲編織管為增強(qiáng)體,PAN為聚合物表面分離層,制備異質(zhì)增強(qiáng)型PAN/PET(編織管)中空纖維膜；以PAN編織管為增強(qiáng)體,PVDF為聚合物表面分離層,制備共溶劑(表面分離層與增強(qiáng)體之間)異質(zhì)增強(qiáng)型PVDF/PAN(編織管)中空纖維膜。研究表明,增強(qiáng)膜中表面分離層與增強(qiáng)體之間界面結(jié)合性能主要取決于二者的熱力學(xué)相容性,同質(zhì)編織管增強(qiáng)型PAN界面結(jié)合性能最優(yōu),共溶劑異質(zhì)增強(qiáng)型PVDF/PAN(編織管)次之,異質(zhì)增強(qiáng)PAN/PET(編織管)型最差,共溶劑可提高異質(zhì)增強(qiáng)型中空纖維膜界面結(jié)合性能。以PAN編織管為增強(qiáng)體,將親水性聚合物CA與PAN共混作為分離層,制得增強(qiáng)型PAN/CA共混中空纖維膜。研究發(fā)現(xiàn),增強(qiáng)型PAN/CA共混中空纖維膜內(nèi)存在大量界面微孔：隨著共混體系內(nèi)CA組分含量增加,膜表面分離層內(nèi)PAN由連續(xù)相逐漸過渡為分散相,而CA由分散相轉(zhuǎn)變?yōu)檫B續(xù)相。當(dāng)PAN為連續(xù)相時(shí),增強(qiáng)體與膜表面分離層間界面結(jié)合牢固,類似于同質(zhì)編織管增強(qiáng)型；而CA為連續(xù)相時(shí),所形成界面結(jié)合較弱,類似于異質(zhì)增強(qiáng)型。用改良Hummers法制備GO摻雜改性PAN(表面分離層),制得同質(zhì)編織管增強(qiáng)型PAN/GO中空纖維膜。研究表明,GO分布于增強(qiáng)膜表面及內(nèi)部膜孔壁。隨著GO含量的增加,膜孔徑分布變窄,膜表面粗糙度增大,親水性顯著提高：膜純水通量和蛋白截留率增加,抗污染性增強(qiáng)。將同質(zhì)編織管增強(qiáng)型PAN、PAN/GO中空纖維膜用于MBR,處理模擬城市生活污水試驗(yàn)。結(jié)果表明,MBR系統(tǒng)內(nèi)對(duì)有機(jī)物的降解去除以生化作用為主,兩種同質(zhì)增強(qiáng)型中空纖維膜均可有效強(qiáng)化系統(tǒng)出水水質(zhì)并提高出水穩(wěn)定性,COD去除率均在97%以上：兩種同質(zhì)編織管增強(qiáng)型中空纖維膜的污染機(jī)理相似,摻雜GO改性同質(zhì)編織管增強(qiáng)型PAN/GO中空纖維膜的抗污性更強(qiáng),膜污染速率更慢,清洗頻率低,運(yùn)行周期更長(zhǎng)。
[Abstract]:The preparation technology of hollow tubular woven fabric (woven pipe) as reinforcement, polyacrylonitrile (PAN) polymer surface layer, the surface of PAN composite tube surface separation layer in woven with the solution phase inversion method, the preparation of homogeneous woven tube reinforced PAN hollow fiber membrane, polymer concentration, additive research, influence the spinning process conditions on membrane structure and performance; the woven tube reinforced method were used to prepare the heterogeneous enhanced PVDF/PAN (woven tube) and PAN/PET (tube) hollow fiber membrane, and the enhanced hollow fiber membrane interfacial properties were studied respectively; cellulose acetate with excellent hydrophilic properties (CA) blended with PAN, graphene oxide (GO) modified surface layer separation as additive doping, surface modification of separation layer enhanced the structure and properties of PAN hollow fiber membrane after; membrane bioreactor will enhance the homogeneity for Reactor (MBR), studies the feasibility of MBR application in the test process and membrane pollution resistance performance. By using homogeneous materials with good thermodynamic compatibility, co solvent, PAN hollow braided tube reinforced PAN polymer surface layer separation, preparation of homogeneous woven tube reinforced PAN hollow fiber membrane. The study found that the solvent in the casting solution on the fiber surface swelling, braided tube dissolution, the enhanced membrane has excellent interfacial properties, the fracture type reinforced PAN hollow fiber membrane strength greater than 75MPa, when the polymer concentration is 10-12wt.%, the content of PVP 8 wt.%, homogeneous braided tube reinforcement structure and properties of PAN the hollow fiber membrane is better. The polyester fiber (PET) filament woven pipe reinforced PAN polymer surface layer separation, preparation of heterogeneous enhanced PAN/PET (tube) hollow fiber membrane; PAN woven tube as a strengthening body, PVDF as polymer sheet Surface separation, preparation of co solvent (surface separation layer and the reinforcement between heterogeneous) enhanced PVDF/PAN (tube) hollow fiber membrane. The results show that surface enhanced membrane separation layer and enhance the interfacial bonding between thermodynamics performance mainly depends on the compatibility of the two, homogeneous woven pipe enhanced PAN interface optimal performance of co solvent heterogeneous enhanced PVDF/PAN (braided tube) of heterogeneous enhanced PAN/PET (tube) type is the worst, co solvent can improve the bonding performance of heterogeneous hollow fiber membrane interface is enhanced. With PAN braided tube as reinforcement, the hydrophilic polymer CA was blended with PAN as separation layer was enhanced type PAN/CA blend hollow fiber membrane. The study found that the enhanced PAN/CA blend hollow fiber membrane in the existence of a large number of micro interface: with the CA content in the blends increased, membrane separation layer PAN by continuous phase transition as the dispersed phase, and C A consists of dispersed phase to continuous phase. When the PAN is in continuous phase, combined with solid body and membrane surface separation interface enhancement, similar to the homogeneous braided tube enhanced; while CA is in continuous phase, the formation of interfacial bonding is weak, similar to the heterogeneous enhanced. With the modified Hummers prepared by GO doping PAN (surface layer), prepared homogeneous braided tube reinforced PAN/GO hollow fiber membrane. The study shows that the distribution of GO in reinforced membrane surface and internal pore walls. With the increase of GO content, membrane pore size distribution becomes narrow, the surface roughness increases, the hydrophilic membrane significantly improved: the pure water flux and protein retention the rate of increase in anti pollution increased. The homogeneous braided tube reinforced PAN, PAN/GO hollow fiber membrane for treatment of city sewage MBR, simulation test. The results show that the MBR system in the degradation of organic matter removal by biochemical effect, two kinds of homogeneous enhancement type hollow fiber membrane Can effectively enhance the quality of effluent water and improve water stability, the removal rate of COD were above 97%: two different braided tube reinforced hollow fiber membrane fouling mechanism similar to that of GO doped modified homogeneous woven tube reinforced anti pollution more type of PAN/GO hollow fiber membrane, the membrane fouling rate is slower, the cleaning frequency is low, a longer operation cycle.

【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：TQ028.8

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉海亮;肖長(zhǎng)發(fā);黃慶林;舒?zhèn)?;增強(qiáng)型中空纖維多孔膜研究進(jìn)展[J];紡織學(xué)報(bào);2015年09期

2 王盼;;污水處理MBR用聚丙烯腈微孔膜的制備與性能表征[J];四川環(huán)境;2015年03期

3 權(quán)全;肖長(zhǎng)發(fā);劉海亮;趙微;胡曉宇;環(huán)國(guó)蘭;;纖維編織管增強(qiáng)型中空纖維膜研究[J];高分子學(xué)報(bào);2014年05期

4 白倩倩;肖長(zhǎng)發(fā);張旭良;黃慶林;胡曉宇;;增強(qiáng)型中空纖維膜界面結(jié)合狀態(tài)的研究[J];高分子學(xué)報(bào);2013年12期

5 王瑞;肖長(zhǎng)發(fā);劉美甜;張旭良;;同質(zhì)編織管增強(qiáng)型聚丙烯腈中空纖維膜研究[J];高分子學(xué)報(bào);2013年02期

6 盛夏;劉振鴻;楊琦;張昕;;織布支撐PVDF—納米TiO_2共混膜在MBR中抗污染性能研究[J];水處理技術(shù);2012年03期

7 方超平;蘇儀;萬(wàn)印華;;聚丙烯腈超濾膜的制備[J];化學(xué)工程;2011年07期

8 艾翠玲;林欣欣;蔡麗云;;一體式膜生物反應(yīng)器中胞外聚合物的提取方法比較及其對(duì)膜污染的影響[J];安全與環(huán)境工程;2011年03期

9 左丹英;李紅軍;王琰;;PVDF/PU-編織管復(fù)合膜的制備及其性能研究[J];化工新型材料;2010年09期

10 張坤明;呂謀;劉杰;李紅艷;;膜生物反應(yīng)器超聲波在線清洗的研究[J];給水排水;2010年07期

相關(guān)會(huì)議論文 前1條

1 李鎖定;陳亦力;文劍平;;纖維增強(qiáng)型中空纖維膜的研究開發(fā)[A];第四屆中國(guó)膜科學(xué)與技術(shù)報(bào)告會(huì)論文集[C];2010年

相關(guān)博士學(xué)位論文 前1條

1 左丹英;溶液相轉(zhuǎn)化法制備PVDF微孔膜過程中的結(jié)構(gòu)控制及其性能研究[D];浙江大學(xué);2005年

相關(guān)碩士學(xué)位論文 前1條

1 吳浩峗;無紡管增強(qiáng)型PVDF中空纖維膜的制備研究[D];天津大學(xué);2007年

，

本文編號(hào)：1728895