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1、纖維素/陶瓷復(fù)合膜的制備及油水分離性能研究張大為米世超付超胨里君支樹(shù)迪王剛亶志翹王立平薛群基中國(guó)科學(xué)院寧波材料技術(shù)與工程研宄所上海儀耐新材料科技有限公司目的提高陶瓷膜對(duì)水包油乳化液的分離能力。方法將纖維素粉末充分溶解在氫氧化鈉、尿素、水配制的溶解液屮,低溫真空K在多孔陶瓷分離膜表面構(gòu)筑親水性纖維素涂層。通過(guò)X射線(xiàn)衍射儀(XRD)、場(chǎng)發(fā)射掃描電子顯微鏡(SEM)、接觸角測(cè)量?jī)x、紫外-可見(jiàn)分光光度計(jì)表征纖維素/陶瓷復(fù)合膜的組成、結(jié)構(gòu)、表面潤(rùn)濕性及水油(甲苯)乳液分離效率。結(jié)果纖維素成功復(fù)合到多孔陶瓷膜孔隙表面,空氣中水滴在膜表面的接觸角為0°,
2、水中汕滴的接觸角高達(dá)155°左右,使多孔陶瓷膜具備/在空氣屮超親水-水下超疏油的特性。通過(guò)油水分離實(shí)驗(yàn)發(fā)現(xiàn),在常溫常壓下,多孔陶瓷膜對(duì)水包甲苯乳液高效分離,其油水分離能力099.26%)、抗污染性(經(jīng)20次循環(huán)分離后,三種復(fù)合的平板陶瓷膜的水通量變化不大)得到顯著提高,表現(xiàn)出較好的油水分離性能。結(jié)論陶瓷分離膜經(jīng)纖維素修飾后,表面親水性和水下超疏汕性都得到了提高,汕水分離能力可達(dá)99.26%,重復(fù)使用20次的純水通量無(wú)明顯衰減。關(guān)鍵詞:陶瓷膜;纖維素;超親水;超疏油;乳液;油水分離;張大為(1988一),男,研究生,主要研究方向?yàn)橛退蛛x。王
3、剛(1985—),男,,助理研究員,主要研究方向?yàn)樘厥鉂?rùn)濕性材料表而與界而。2017-07-25基金:中W后科學(xué)基金面上項(xiàng)目(2017M612042)PreparationandOil-WaterSeparationPropertiesofCellulose/CeramicCompositeMembraneZHANGDaieiMIShi-chaoFUChaoCHENJun-junZHIShu-diWANGGangZENGZhi-xiangWANGLi-pingXUEQun-jiNingboInstituteofMaterialsTechno
4、logy&Engineering,ChineseAcademyofSciences;ShanghaiYinaiNewMaterialTechnologyCo.Ltd;Abstract:Theworkaimstoimproveseparationcapacityofceramicmembranetooil/wateremulsion.Cellulosepowderwasfullydissolvedinthesolutionofsodiumhydroxide,ureaandwater,hydrophiliccellulosecoatingwas
5、constructedonporousceramicmembraneinvacuumatlowtemperature.Composition,structure,surfacewettabilityandseparationefficiencyofwater-in-oil(toluene)emulsionwascharacterizedwithX-raydiffractometer(XRD),fieldemissionscanningelec-tronmicroscope(SEM),contactanglemeasuringinstrume
6、ntandtiltraviolet-visiblespectrophotometer.Thecellulosewassuccessfullycompoundedintosurfacesofporousceramicmembranepores.Contactangleofwaterdropletsonthemembraneinairwas0°,andthatofoildropletsinwaterwasupto155°,whichendowedporousceramicmembranewithsuper-hydrophi1icityinair
7、andunderwatersuper-1ipophobicity.Oil-waterseparationexperimentshowedthattheporousceramicmembraneexhibitedhighefficiencyinseparatingtolucnc-in-watcremulsionatnormaltemperatureandpressure.Itsoil-waterseparationcapability(>99.26%)andanti-foulingperformance(waterfluxofthreecom
8、positeflatceramicmembranechangedslightlyafterseparationfor20times)wereimprovedsignificant