本文選題：正滲透 + 聚丙烯腈�。� 參考：《過程工程學報》2017年06期

【摘要】：在聚丙烯腈(PAN)溶液中加入功能化的多壁碳納米管(f-MWCNTs),采用靜電紡絲法制備納米纖維多孔支撐層,在其表面通過界面聚合制備超薄聚酰胺截鹽層,制得正滲透復合膜,考察了PAN濃度及碳納米管添加量對膜結(jié)構(gòu)性能的影響.結(jié)果表明,隨PAN濃度增大,支撐層纖維直徑增大,水通量降低,截鹽率增大.含羧基和羥基的f-MWCNTs可增強膜的親水性和機械強度,提高膜通量和截鹽率.PAN濃度為12%(?)、f-MWCNTs濃度為1.44%(?)時,膜的機械強度可達10.55 MPa,與水的接觸角為41.39°,機械強度和親水性優(yōu)于未添加碳納米管的PAN正滲透膜(機械強度3.60 MPa,接觸角為61.86°).以1 mol/L Na Cl為汲取液、去離子水為原料液,膜的水通量可達79.1 L/(m2·h),明顯高于商用滲透膜CTA-NW和CTA-ES[8.8和18.4 L/(m2·h)],溶質(zhì)反向通量僅為50.4 g/(m2·h).
[Abstract]:In polyacrylonitrile (pan) solution, functionalized multi-walled carbon nanotubes (MWCNTsN) were added to prepare porous support layers of nanofibers by electrostatic spinning. Ultrathin polyamide intersected salt layers were prepared by interfacial polymerization on the surface of polyacrylonitrile (pan), and the composite membranes were prepared by normal osmosis.The effects of the concentration of PAN and the amount of carbon nanotubes on the structure and properties of the membranes were investigated.The results show that with the increase of PAN concentration, the fiber diameter of the supporting layer increases, the water flux decreases and the salt interception rate increases.The hydrophilicity and mechanical strength of f-MWCNTs with carboxyl group and hydroxyl group can be enhanced.The mechanical strength of the membrane is 10.55 MPA, and the contact angle with water is 41.39 擄. The mechanical strength and hydrophilicity of the membrane are better than that of the PAN positive osmotic membrane without carbon nanotubes (mechanical strength 3.60 MPA, contact angle 61.86 擄).Using 1 mol/L NaCl as extraction solution and deionized water as raw material, the water flux of the membrane was 79.1 L/(m2 hu, which was significantly higher than that of commercial osmotic membrane CTA-NW and CTA-ES [8.8 and 18.4 L/(m2 h], and the reverse flux of solute was only 50.4 g/(m2 hu.
【作者單位】： 湘潭大學化工學院;中國科學院過程工程研究所綠色過程與工程重點實驗室;北京市過程污染控制工程技術研究中心;
【基金】：基金項目 煤轉(zhuǎn)化廢水近零排放及資源化關鍵技術研究與應用示范(編號:2016YFB0600505)
【分類號】：TQ051.893
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本文編號：1744118