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摘要
采用浓硫酸(H2SO4)、浓硝酸(HNO3)质量配合比为3∶1混酸改性、超声混融和化学水热法配置负载四氧化三铁(Fe3O4)的多壁碳纳米管(MWCNTs)(MWCNTs/Fe3O4),将酸化改性的MWCNTs/Fe3O4与聚偏氟乙烯(PVDF)、聚乙二醇(PEG)、N,N-二甲基乙酰胺(DMAC)共混制膜,制得MWCNTs/Fe3O4/PVDF共混膜。通过对膜的膜表断面、接触角、纯水通量、孔隙率、平均孔径和有关物质的截留率进行测试。结果发现,MWCNTs/Fe3O4/PVDF共混膜的接触角为56.65°,纯水通量为152.866L·m2/h,对腐殖酸(HA)、海藻酸钠(SA)、双酚A(BPA)、牛血清蛋白(BSA)的截留率分别为59.71%、71.16%、59.10%、76.00%,皆较纯PVDF膜有所提高,MWCNTs/Fe3O4的添加提高了PVDF膜的总体性能。
Abstract
Multi-walled carbon nanotubes (MWCNTs) loaded with ferric oxide (Fe3O4) (MWCNTs/Fe3O4) were prepared by mixed acid modification with concentrated sulfuric acid (H2SO4) and concentrated nitric acid (HNO3) at a mass ratio of 3∶1,ultrasonic mixing and chemical hydrothermal method.The MWCNTs/Fe3O4/PVDF blend membranes were prepared by blending the acidified MWCNTs/Fe3O4 with polyvinylidene fluoride (PVDF),polyethylene glycol (PEG),N,N-dimethylacetamide (DMAC).The membrane surface,contact angle,pure water flux,porosity,average pore diameter and retention rates of 5 substances such as drugs and personal care products (PPCPs) and sodium alginate were tested.The results shown that the contact angle of MWCNTs/Fe3O4/PVDF was 56.65 degrees,the pure water flux of 152.866L·m2/h,the retention rates of humic acid (HA),sodium alginate (SA),bisphenol A (BPA) and bovine serum albumin (BSA) were 59.71%,71.16%,59.10%,76.00%,respectively.The propertis of film were improved than pure PVDF film.The addition of MWCNTs/Fe3O4 improved the overall performance of PVDF film.
关键词
多壁碳纳米管/四氧化三铁
/
聚偏氟乙烯
/
海藻酸钠
Key words
MWCNTs/Fe3O4
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PVDF
/
SA
MWCNTs/Fe3O4/PVDF共混膜的制备及性能研究[J].
化工新型材料, 2019, 47(9): 99-103 DOI:
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基金资助
甘肃省自然科学基金A类项目(1506RJZA099,1506RJZA096);建工七七基金(TJ2017-G01)
