无纺布的亲水改性及其抗生物腐蚀性能

Hydrophilic modification of the nonwovens and their anti- biodeterioration property

无纺布膜生物反应器(MBR)以其占地面积小、固液分离效果好,成为难降解印染废水处理技术的重要发展方向,但其存在膜污染问题。采用聚乙烯醇(PVA)对无纺布进行亲水改性,以提高改性无纺布的亲水性及抗腐蚀性能。结果表明,在PVA质量浓度小于1 g/L、戊二醛(GA)为0.5%的条件下,随着PVA质量浓度的提高,无纺布的亲水性逐渐增强,动态接触角由112.7°降至22.0°,但抗生物腐蚀性较差;在GA质量分数为2.0%、PVA为10 g/L的条件下改性无纺布,则其对牛血清蛋白(BSA)单位吸附量由改性前的7.043 6 g/m2降低至3.142 5 g/m2,抗污染性大大提高。

Nonwoven membrane bioreactor（MBR） is an important research field in the treatment of dyeing wastewater for its lower occupation area and good solid-liquid separation results,except for its membrane fouling.Hydrophobic and anti-fouling performances of nonwoven fabric are improved by modification with polyvinyl alcohol and glutaraldehyde.The results show that when the concentration of GA is 0.5％,increasing the PVA dosage from 0 to 1 g/L,the hydrophility of nonwoven is improved with the dynamic contact angle decreased from 112.7° to 22.0°,but the anti-corrosion performance of the modified nonwoven is poor.The non-woven modified by high concentration of PVA has good hydrophilic but poor anti-corrosion.The fouling resistance of nonwoven is greatly improved with the adsorption of bovine serum albumin（BSA） decreased from 7.043 6 g/m2 to 3.142 5 g/m2 at the modified conditions of GA 2.0％ and PVA 10 g/L.