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首页> 外文期刊>RSC Advances >Modifications of polyethersulfone membrane by doping sulfated-TiO2 nanoparticles for improving anti-fouling property in wastewater treatment
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Modifications of polyethersulfone membrane by doping sulfated-TiO2 nanoparticles for improving anti-fouling property in wastewater treatment

机译：掺杂硫酸化TiO 2 纳米颗粒对聚醚砜膜的改性以提高废水处理的防污性能

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摘要

Polyethersulfone (PES) composite membranes mixed with sulfated-TiO2 nanoparticles were fabricated using a non-solvent induced phase inversion method. Sulfating had little effect on particle size and crystal phase of TiO2 nanoparticles. However, the roles of each nanoparticle as doping materials to reduce membrane fouling for the PES membrane were apparent. The PES membrane embedded with sulfated-TiO2 nanoparticles showed higher pure water permeability and larger membrane pore size while lowering fouling rate than the PES membrane embedded with bare TiO2 nanoparticles (without sulfating) for bovine serum albumin solution as a feed. Water uptake capacity and hydrophilicity of the PES membrane was improved significantly by introducing the sulfated-TiO2 nanoparticles into the membrane. As a dosage of sulfated TiO2 nanoparticles was above 0.8 wt%, however, membrane porosity was reduced due to aggregation of the nanoparticles causing membrane pore blockage. The sulfated-TiO2 nanoparticles improved membrane hydrophilicity while reducing fouling rate under strong acidity caused by incorporation of sulfate groups with PES polymer chains.
机译：采用非溶剂诱导的相转化法制备了掺有硫酸化TiO 2 纳米颗粒的聚醚砜复合膜。硫酸盐对TiO 2 纳米颗粒的粒径和晶相影响很小。然而，每个纳米颗粒作为掺杂材料以减少PES膜的膜结垢的作用是显而易见的。包埋有硫酸化TiO 2 纳米颗粒的PES膜比包埋有TiO <的PES膜具有更高的纯净水渗透率和更大的膜孔径，同时降低了结垢率。 sub> 2 纳米粒子（无硫酸盐）作为牛血清白蛋白溶液的饲料。通过将硫酸化的TiO 2 纳米颗粒引入膜中，可以显着提高PES膜的吸水能力和亲水性。当硫酸化的TiO 2 纳米颗粒的用量超过0.8 wt％时，由于纳米颗粒的聚集导致膜孔堵塞，膜的孔隙率降低。硫酸化的TiO 2 纳米颗粒改善了膜的亲水性，同时降低了由于硫酸根基团与PES聚合物链结合而在强酸性下的结垢率。

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