本文選題：氯化聚氯乙烯超濾膜　切入點(diǎn)：聚乙二醇　出處：《水處理技術(shù)》2017年09期 　論文類型：期刊論文

【摘要】：探討了聚乙二醇(PEG)及其分子量對氯化聚氯乙烯(CPVC)鑄膜液黏度及其超濾膜微觀結(jié)構(gòu)和性能(純水通量、截留率、機(jī)械性能和耐污染性能)的影響。結(jié)果表明,隨著PEG分子量的增大,CPVC鑄膜液黏度增大,CPVC超濾膜表面由網(wǎng)絡(luò)大孔結(jié)構(gòu)變?yōu)橹旅芙Y(jié)構(gòu),PEG400和600對CPVC超濾膜斷面微觀結(jié)構(gòu)沒有太大影響,仍然保持海綿狀結(jié)構(gòu),PEG相對分子質(zhì)量超過1 000以后,CPVC超濾膜斷面變?yōu)橹笭畲罂捉Y(jié)構(gòu)與皮層構(gòu)成非對稱結(jié)構(gòu)。鑄膜液中添加PEG后,CPVC超濾膜純水通量大幅度上升,但是截留率有不同程度的下降;隨著PEG分子量的增大,CPVC超濾膜的純水通量,耐污染性能及截留率均呈上升趨勢。綜合比較,PEG600作為添加劑,CPVC超濾膜能獲得較好的性能。
[Abstract]:The effects of polyethylene glycol (PEG) and its molecular weight on the viscosity of chlorinated polyvinyl chloride (CPVC) casting solution and the microstructure and properties of its ultrafiltration membrane (pure water flux, retention rate, mechanical property and pollution resistance) were investigated. With the increase of PEG molecular weight, the surface of CPVC ultrafiltration membrane changed from macroporous structure to dense structure. The cross-section of CPVC ultrafiltration membrane was changed into an asymmetric structure of finger macroporous structure and cortex after the relative molecular weight of PEG exceeded 1 000. The pure water flux of PEG ultrafiltration membrane increased significantly after adding PEG into the casting solution. With the increase of the molecular weight of PEG, the water flux, the resistance to pollution and the rejection rate of CPVC-UF membrane were all increasing, and the comparison of PEG600 as an additive could obtain better performance of UF membrane with the increase of molecular weight of CPVC.The results showed that the water flux, fouling resistance and rejection rate of CPVC-UF membrane increased with the increase of molecular weight of CPVCUF membrane.
【作者單位】： 東華大學(xué)環(huán)境科學(xué)與工程學(xué)院國家環(huán)境保護(hù)紡織污染防治工程技術(shù)中心;
【分類號】：TQ051.893

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