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采用Fenton试剂对聚偏氟乙烯(PVDF)膜进行氧化改性,研究了[H2O2]/[Fe2+]及温度对超滤膜性能的影响,测定了改性前后超滤膜的纯水渗透通量、截留性能、膜表面亲水性、耐污染性性能及红外光谱。结果表明,随着[H2O2]/[Fe2+]比值的增大,纯水渗透通量由纯PVDF膜的26.7L/(m2.h)提高到103.2L/(m2.h),膜表面水接触角由75°降为58.5°,黏附功由91.64mN/m提高到110.84mN/m。温度升高利于改性。[H2O2]/[Fe2+]比值为12时,红外光谱图中出现了C=C双键及O-H键的伸缩振动特征峰,膜阻力增大系数m由纯PVDF膜的1.049减小到0.448,膜的耐污染性能得到明显改善。
The effect of [H2O2] / [Fe2 +] and temperature on the performance of ultrafiltration membrane was investigated by using Fenton reagent to oxidize polyvinylidene fluoride (PVDF) membrane. The permeation flux of pure water before and after modification was measured , Retention, membrane surface hydrophilicity, stain resistance and infrared spectrum. The results showed that with the increase of the [H2O2] / [Fe2 +] ratio, the pure water flux increased from 26.7L / (m2.h) to 103.2L / (m2.h) The angle was reduced from 75 ° to 58.5 °, and the adhesion work increased from 91.64 mN / m to 110.84 mN / m. Improve the temperature conducive to modification. When the ratio of [H2O2] / [Fe2 +] is 12, the stretching vibration characteristic peaks of C = C double bond and OH bond appear in the infrared spectrum. The increasing coefficient of membrane resistance m decreases from 1.049 to 0.448 for pure PVDF membrane, The pollution resistance has been significantly improved.