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以二苯甲酮(BP)为紫外接枝引发剂,将辣素衍生物N-(2,3,4-三甲氧基苯甲基)丙烯酰胺(TMBA)和丙烯酸(AA)接枝在聚砜基膜表面上以提高膜的抗菌性和耐污染性。在先前研究的基础上,试验固定接枝时间为15 min,TMBA和AA的质量分数分别为1%和2%,溶剂为乙醇,通过表面接触角测定仪、全反射红外光谱、扫描电镜、水通量和截留率、耐污染性、抗菌性测试等方法来表征膜改性前后的结构和性能变化,研究引发剂BP含量对膜表面结构性能的影响。结果表明,改性后聚砜超滤膜的截留率、耐污染性等都得到很好的改善,尤其是改性膜的抗菌性得到了明显提高;当BP的质量分数为0.2%时,抑菌率达到95%左右,通量恢复率由基膜的25%提高到80%,可以证明改性后的聚砜膜具有了良好的抗菌性和耐污染性。
Using benzophenone (BP) as UV grafting initiator, the auxin derivative N- (2,3,4-trimethoxybenzyl) acrylamide (TMBA) and acrylic acid (AA) Sulfone membrane surface to improve the antimicrobial and stain resistance of the membrane. On the basis of the previous studies, the fixed grafting time was 15 min, the mass fraction of TMBA and AA were 1% and 2% respectively, and the solvent was ethanol. The surface gravimetry, TIR, SEM and water Flux and rejection, stain resistance, antibacterial test and other methods to characterize membrane structure before and after the change and performance changes, the initiator of BP content on the membrane surface structure and performance. The results showed that the modified polysulfone ultrafiltration membrane rejection, stain resistance and so have been well improved, especially the modified membrane antibacterial has been significantly improved; when the BP mass fraction of 0.2%, the inhibition The rate of bacteria reached about 95%, and the flux recovery rate increased from 25% to 80% of the basement membrane, which proves that the modified polysulfone membrane has good antibacterial and fouling resistance.