本文選題：聚丙烯腈 + 絲朊�。� 參考：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：基于仿生學(xué)的思想,以氯化鋅水溶液為溶劑,通過(guò)絲朊均相接枝聚丙烯腈得到鑄膜液,然后將其放入水的凝固浴中,鋅離子和氯離子逐漸擴(kuò)散到水中,絲朊和聚丙烯腈發(fā)生相轉(zhuǎn)變成膜。鋅離子和氯離子起到致孔的作用,而絲朊和聚丙烯腈發(fā)生微相分離,在其界面也形成離子致孔的水通道,因此得到的絲朊接枝聚丙烯腈(SF-g-PAN)過(guò)濾膜孔徑分布窄,親水性好。通過(guò)掃描電子顯微鏡(SEM)、傅里葉紅外光譜(FTIR)、熱重分析(TG-DTG)和水接觸角等方法對(duì)膜進(jìn)行了表征。以不同分子量染料溶液探究了 SF-g-PAN過(guò)濾膜的過(guò)濾性能,SF-g-PAN過(guò)濾膜對(duì)于分子量大于660的染料直接黃27(Mw=662.62 Da)的截留率可以達(dá)到96%以上,對(duì)莧菜紅(Mw= 604.47 Da)的截留率為30%。結(jié)果表明SF-g-PAN過(guò)濾膜具有精細(xì)分離性能和pH響應(yīng)性。牛血清蛋白(BSA)溶液過(guò)濾實(shí)驗(yàn)中穩(wěn)定后BSA水溶液的通量約為純水通量的86.39%,表明SF-g-PAN過(guò)濾膜具有較好的抗污染性能。以葡聚糖為聚合物骨架,丙烯腈為單體,氯化鋅水溶液為溶劑制備了葡聚糖接枝聚丙烯腈過(guò)濾膜(De-g-PAN)。通過(guò)SEM、FTIR、TG-DTG、水接觸角等方法對(duì)過(guò)濾膜進(jìn)行表征。討論了不同葡聚糖含量的De-g-PAN過(guò)濾膜對(duì)不同分子量染料的截留和通量。結(jié)果表明,De-g-PAN過(guò)濾膜對(duì)分子量高于660的染料分子具有良好的去除效果,同時(shí)隨葡聚糖含量的增加,過(guò)濾膜對(duì)染料的截留率升高,通量減小。De-g-PAN過(guò)濾膜對(duì)BSA和乳化油具有良好的抗污染性能,葡聚糖含量的增加在一定程度上提高了膜的抗污染性能。在過(guò)濾過(guò)程中起主要作用的仍為PAN高分子,因此隨后我們討論了兩種不同方法制備的PAN膜的過(guò)濾性能。通過(guò)使用氯化鋅、二甲基甲酰胺兩種不同溶劑線(xiàn)路的方法成功制備出不同結(jié)構(gòu)的PAN過(guò)濾膜。通過(guò)SEM、3D超景深顯微鏡、激光共聚焦顯微鏡對(duì)膜在干濕狀態(tài)下的形貌進(jìn)行表征,通過(guò)XRD、水接觸角、力學(xué)性能比較了兩種膜的結(jié)構(gòu)性能。兩種溶劑制備對(duì)不同分子量染料的截留表明,以氯化鋅為溶劑制備的PAN膜孔徑分布較窄,同時(shí)具有較好的抗污染性能。
[Abstract]:Based on the idea of bionics, the casting film solution was obtained by homogeneous grafting of polyacrylonitrile with silk prion in aqueous solution of zinc chloride, and then it was put into the coagulation bath of water. Zinc ion and chloride ion gradually diffused into water. Silk prion and polyacrylonitrile are transformed into films. Zinc ion and chloride ion play a role in pore formation, while silk prion and polyacrylonitrile are separated in microphase and the water channel of ion induced pore is formed at its interface. Therefore, the pore size distribution and hydrophilicity of silk prion grafted polyacrylonitrile (SF-g-PAN) membrane are narrow and hydrophilic. The films were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG-DTG) and water contact angle. The filtration performance of SF-g-PAN filtration membrane was studied by using different molecular weight dye solutions. The rejection rate of SF-g-PAN filter membrane for direct yellow 27 (MwN 662.62 Da) with molecular weight greater than 660 was over 96%, and that for amaranth (MW = 604.47 Da) was 30%. The results show that SF-g-PAN filtration membrane has fine separation performance and pH response. In the filtration experiment of bovine serum protein (BSA) solution, the flux of stable BSA solution is about 86.39 of pure water flux, which indicates that SF-g-PAN filtration membrane has better anti-fouling performance. Using dextran as polymer skeleton, acrylonitrile as monomer, zinc chloride aqueous solution as solvent, De-g-PAN was prepared by grafting polyacrylonitrile (De-g-PAN). The filtration membrane was characterized by SEM-FTIR TG-DTG and water contact angle. The retention and flux of different molecular weight dyes by De-g-PAN filtration membrane with different dextran content were discussed. The results showed that De-g-PAN filtration membrane had a good removal effect on dye molecules with molecular weight higher than 660, and the retention of dyes increased with the increase of dextran content. De-g-PAN filtration membrane has good anti-fouling performance on BSA and emulsified oil, and the increase of dextran content improves the anti-fouling performance of the membrane to some extent. Pan polymers still play a major role in the filtration process, so we discussed the filtration performance of pan membranes prepared by two different methods. Pan filtration membranes with different structures were successfully prepared by using zinc chloride and dimethylformamide two different solvent lines. The morphology of the films in dry and wet state was characterized by SEMM-3D hyper-depth microscope and laser confocal microscope. The structure and properties of the two films were compared by XRD, water contact angle and mechanical properties. The retention of different molecular weight dyes by the preparation of two solvents showed that the pore size distribution of pan membrane prepared with zinc chloride as solvent was narrow and had good antifouling performance.
【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(lèi)號(hào)】：TQ051.893

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