CAJ | 학술논문

采用丙烯酰胺接枝法对聚丙烯（PP）多孔膜表面进行亲水化改性，考察了硝酸浓度、接枝时间以及水解时间对膜结构和性能的影响。随硝酸浓度增加，接枝度先增后降，膜表面的水接触角先减小后增大；随接枝时间延长，接枝度先增加后几乎不变，水接触角先减小后趋于恒定；随水解时间延长，接枝度几乎不变，而水接触角先减小后趋于恒定。优选的亲水化改性条件下，PP多孔膜的接枝度为1?147?μg/cm2，水接触角由124°降至47°。过膜压差为0.5?MPa时，聚酰亚胺/PP纳滤复合膜的纯水通量和对1?g/L的Na2SO4溶液的截留率分别可达11.89?L/（?m2·h）和92.86%。
채용병희선알접지법대취병희（PP）다공막표면진행친수화개성，고찰료초산농도、접지시간이급수해시간대막결구화성능적영향。수초산농도증가，접지도선증후강，막표면적수접촉각선감소후증대；수접지시간연장，접지도선증가후궤호불변，수접촉각선감소후추우항정；수수해시간연장，접지도궤호불변，이수접촉각선감소후추우항정。우선적친수화개성조건하，PP다공막적접지도위1?147?μg/cm2，수접촉각유124°강지47°。과막압차위0.5?MPa시，취선아알/PP납려복합막적순수통량화대1?g/L적Na2SO4용액적절류솔분별가체11.89?L/（?m2·h）화92.86%。
Porous?polypropylene(PP)membrane?was?modified?by?grafting?acrylamide?onto?its?surface?to?improve?its?hydrophilicity.?The?effect?of?nitric?acid?concentration,?grafting?time?and?hydrolysis?time?on?structure?and?performance?of?the?membranes?were?investigated.?The?grafting?degree?first?increased?and?then?decreased, while?the?water?contact?angle?first?decreased?and?then?increased?with?the?increase?of?nitric?acid?concentration.?The?grafting?degree?first?increased?and?then?tended?to?be?constant,?while?the?water?contact?angle?first?decreased?and?then?tended?to?be?constant?with?the?extension?of?grafting?time.?The?grafting?degree?was?almost?a?constant?and?the?water?contact?angle?first?decreased?and?then?tended?to?be?constant?with?the?increase?of?hydrolysis?time.?The?grafting?degree?was?1?147?μg/cm2?and?the?water?contact?angle?decreased?from?124°to?47°under?the?optimal?hy-drophilic?modification?conditions.?When?the?trans-membrane?pressure?was?0.5?MPa,?the?pure?water?flux?and?re-tention?rate?to?Na2SO4?solution?of?1?g/L?of?polyimide/PP?nanofiltration?membrane?reached?11.89?L/(m2·h)?and?92.86%,?respectively.