负载羧基化球状介孔纳米颗粒TFN膜的研究  

Research of thin film nanocomposite(TFN)membranes incorporated spherical mesoporous silica nanoparticles with carboxyl group

作　　者：孙艳 刘士涛 邓尚 余丽芸[2] 吕东伟 马军 刘献斌[4] SUN Yan;LIU Shitao;DENG Shang;YU Liyun;LYU Dongwei;MA Jun;LIU Xianbin(Kunshan Innovation Institute of Nanjing University,Kunshan 215347,Jiangsu,China;College of Life Sciences and Technology,Heilongjiang Bayi Agricultural University,Daqing 163319,Heilongjiang,China;State Key Laboratory of Urban Water Resource and Environment,School of Environmental,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China;School of Chemistry and Environmental Engineering,Harbin University of Science and Technology,Harbin 150040,Heilongjiang,China)

机构地区：[1]南京大学昆山创新研究院,江苏昆山215347 [2]黑龙江八一农垦大学生命科学技术学院,黑龙江大庆163319 [3]哈尔滨工业大学环境学院,城市水资源与环境国家重点实验室,黑龙江哈尔滨150090 [4]哈尔滨理工大学化学与环境工程学院,黑龙江哈尔滨150040

出　　处：《化工学报》2020年第S01期454-460,共7页CIESC Journal

基　　金：中国博士后科学基金资助项目(2014M561359);江苏省科技项目(BE2016695)。

摘　　要：在薄层复合膜(thin-film composite membrane,TFC膜)中引入无机纳米颗粒,形成薄层纳米复合膜(thin-film nanocomposite membrane,TFN膜),近几年作为反渗透膜开始应用于水处理研究。但是无机纳米颗粒在TFC膜中的性能的不稳定性和膜的机械强度等变成了突出问题。合成制备了粒径约为110 nm修饰羧基的介孔氧化硅球状纳米颗粒(MSN—COOH),并将其成功地化学键合在TFC膜的表面功能层交联网络中。与TFC膜相比,键合有MSN—COOH的TFN膜,水通量提高了56.2%,保持高脱盐率;由于单分散介孔纳米颗粒表面亲水官能团的引入,使膜表面的亲水性有很大程度提高,单分散介孔纳米颗粒在基体中的有序排列,使膜表面粗糙度降低,提高了膜的抗污染能力。与普通TFN膜相比较,具有更好的稳定性和柔韧性,可以在长时间高压过滤操作下保持稳定。Thin film composite(TFC)membranes incorporated with inorganic nanoparticles to form thin film nanocomposite(TFN)membranes,which had attracted much attention recently.However,the instability of nanoparticles in the TFC membranes and the insufficient mechanical strength of the membranes became the main challenges.Mesoporous silica nanoparticles with an average particle size of ca.110 nm were modified with carboxyl groups,noted as MSN—COOH and further immobilized on the functional layer of the TFC membranes.The carboxyl groups were successfully incorporated into the mesoporous channels of MSN by characterization techniques,MSN—COOH nanoparticles were successfully bonded to the surface functional layer of the TFC film and formed the crosslinked network.Our experimental results revealed that the TFN membrane hybridized with MSN—COOH demonstrated up to 56.2%improvement in water flux,higher salt rejection,and improved mechanical strength compared to the control TFC membranes.Due to the addition of hydrophilic functional groups in monodisperse mesoporous nanoparticles,the hydrophilicity of the membrane surface was increased.Because of the ordered arrangement of monodisperse mesoporous nanoparticles in the matrix,the roughness of the membrane was lowered to a great extent,which was beneficial for enhancing water molecular transfer and fouling resistance of the membranes.Compared with plain TFN membranes,it had better stability and flexibility which kept the stabilization of membranes under high pressure filtration operation.

关 键 词：纳米粒子 膜 二氧化硅 TFN 羧基修饰 界面聚合 

分 类 号：TQ051.893[化学工程]