發(fā)布時間：2018-05-05 07:10

  本文選題：正滲透膜 + 多壁碳納米管　； 參考：《水處理技術(shù)》2017年12期

【摘要】：將多壁碳納米管(MWCNTs)和醋酸纖維素(CA)進行物理共混改性,利用相轉(zhuǎn)化法制備MWCNTs改性正滲透膜,通過掃描電子顯微鏡和傅立葉紅外分光光度計的表征、水通量和反向鹽通量的測定等方法考察了MWCNTs添加量對膜結(jié)構(gòu)及性能的影響,并采用耗散型石英晶體微天平探討了高鹽條件下海藻酸鈉(SA)在不同含量MWCNTs改性膜表面的吸附行為及吸附層結(jié)構(gòu)特征。結(jié)果表明,添加適量MWCNTs能使膜的滲透性能和抗污染性能明顯提高。當(dāng)MWCNTs的質(zhì)量分數(shù)為0.5%時,膜性能最佳,其純水通量為14.5 L/(m~2·h),反向鹽通量為8.54 g/(m~2·h)。在一定范圍內(nèi),隨著MWCNTs的含量增加,膜表面對SA的吸附速率和吸附量降低,形成的吸附層更為疏松。
[Abstract]:Multiwalled carbon nanotubes (MWCNTs) and cellulose acetate (CA) were modified by physical blending. MWCNTs modified positive osmotic membranes were prepared by phase inversion method and characterized by scanning electron microscope (SEM) and Fourier transform infrared spectrophotometer (FTIR). The effects of MWCNTs addition on the structure and properties of the membrane were investigated by measuring the water flux and the reverse salt flux. The adsorption behavior and the structure of adsorption layer of sodium alginate on the surface of MWCNTs modified membrane with different contents under high salt conditions were investigated by using dissipative quartz crystal microbalance. The results showed that the permeation and antifouling properties of the membrane were obviously improved by adding proper amount of MWCNTs. When the mass fraction of MWCNTs is 0.5, the membrane performance is the best, the pure water flux is 14.5 L/(m~2 HG, and the reverse salt flux is 8.54 g/(m~2 HG. In a certain range, with the increase of MWCNTs content, the adsorption rate and adsorption amount of SA on the membrane surface decreased, and the adsorption layer was more loose.
【作者單位】： 西安建筑科技大學(xué)環(huán)境與市政工程學(xué)院;
【基金】：國家自然基金項目(51278408)
【分類號】：P747;TQ051.893

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本文編號：1846734