凝固浴组成对PVDF-g-PACMO共聚物膜结构与抗污染性能的影响

发布时间：2018-04-28 18:58

本文选题：聚偏氟乙烯 + 丙烯酰吗啉　；参考：《高分子材料科学与工程》2017年10期

【摘要】：采用亲水、无毒、生物相容性好、对蛋白质吸附有排斥作用的丙烯酰吗啉(ACMO)对聚偏氟乙烯(PVDF)本体进行亲水改性,研究了凝固浴中不同乙醇含量(乙醇:去离子水的质量比分别为0∶100,15∶85,30∶70,45∶55)对PVDFg-PACMO共聚物膜抗污染性能的影响。结果表明,随着凝固浴中乙醇含量的增加,膜断面孔结构向海绵状转变,膜平均孔径和孔隙率增大,纯水通量增加,牛血清蛋白(BSA)截留率降低,膜表面亲水性增加,抗污染性能提高。当凝固浴中乙醇质量分数为45%时,膜表面BSA的吸附量由115.4μg/cm2降至20.6μg/cm2,通量恢复率高达97.6%,总污染指数低至0.148。因此,通过改变凝固浴中乙醇的含量,能使PVDF-g-PACMO膜表面亲水性明显提高,制得了具有良好抗蛋白质污染能力的改性PVDF膜。
[Abstract]:Polyvinylidene fluoride (PVDF) bulk was modified by hydrophilic, nontoxic, biocompatible and repellent acrylmorpholine (ACMO). The effects of different ethanol content (mass ratio of ethanol to deionized water of 0: 100: 15: 85: 30: 70: 45: 55) on the antifouling properties of PVDFg-PACMO copolymer membranes were studied. The results showed that with the increase of ethanol content in coagulation bath, the pore structure of membrane section changed to spongy, the average pore size and porosity of membrane increased, the flux of pure water increased, the rejection rate of bovine serum protein (BSA) decreased, and the hydrophilicity of membrane surface increased. The anti-pollution performance is improved. When the ethanol content in coagulation bath is 45, the adsorption capacity of BSA on the membrane surface decreases from 115.4 渭 g/cm2 to 20.6 渭 g / cm ~ 2, the flux recovery rate is up to 97.6, and the total pollution index is as low as 0.148. Therefore, by changing the content of ethanol in coagulation bath, the surface hydrophilicity of PVDF-g-PACMO membrane can be improved obviously, and the modified PVDF membrane with good protein pollution resistance can be prepared.
【作者单位】：分离膜与膜过程国家重点实验室天津工业大学材料科学与工程学院;天津理工大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(21374078,51303129) 天津市自然科学基金资助项目(15JCYBJC17900,14JCZDJC38300)
【分类号】：TQ051.893

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