热致相分离法制备丙烯腈-丙烯酸甲酯/纳米TiO_2复合膜及膜性能研究  

Preparation and characterization of acrylonitrile-methyl acrylate/TiO_2 composite membrane by thermally induced phase separation

作　　者：王争争[1] 韩娜[1] 陈素梅[1] 张兴祥[1] 李伟[2] 

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387

出　　处：《中国科技论文》2014年第12期1362-1367,共6页China Sciencepaper

基　　金：国家自然科学基金资助项目(21206123;51203113);国家大学生创新创业计划资助项目(201210058028);高等学校博士学科点专项科研基金资助项目(20111201120001);中国博士后科学基金资助项目(2014M551026);天津市应用基础与前沿技术研究计划青年基金资助项目(13JCQNJC02300)

摘　　要：以自制的可熔融丙烯腈(AN)-丙烯酸甲酯(MA)共聚物为基体,以碳酸乙烯酯(EC)与柠檬酸三乙酯(TEC)为复配稀释剂,采用热致相分离法(TIPS)制备丙烯腈-丙烯酸甲酯(AN-MA)/纳米二氧化钛(TiO2)复合膜。借助场发射扫描电子显微镜(FESEM)、X-射线衍射仪(XRD)和万能试验机,从微孔膜的力学性能、水通量、孔隙率、晶型等方面对膜的结构与性能进行表征。结果表明,添加TiO2纳米粒子可以显著提高AN-MA微孔膜的机械强度和水通量。随着TiO2含量的增加,微孔膜的机械强度先增加后降低,TiO2质量分数为0.1%时,断裂强度最高可达8.0 MPa,比未添加TiO2的样品高36%。纳米TiO2的加入一定程度上抑制了大孔的产生,微孔膜结构更加均一。随着凝固浴温度的升高,微孔膜的力学性能逐渐提高,通量出现下降趋势。Acrylonitrile-methyl acrylate (AN-MA)/TiO2 composite membrane was prepared by thermally induced phase separa-tion (TIPS),using melt AN-MA copolymer as matrix,ethylene carbonate (EC)and triethyl citrate (TEC)as a complex diluent. With the help of field emission scanning electron microscope (FESEM),X-ray diffraction (XRD)and universal testing machine, the mechanical property,water flux,porosity and crystal form of the membrane were tested.The results show that the addition of TiO2 nanoparticles can significantly improve the mechanical strength and the water flux of AN-MA/TiO2 composite membrane. With the increase of TiO2 content,the mechanical strength of the composite membrane first increased and then decreased.When TiO2 mass fraction is 0.1%,the breaking strength of AN-MA/TiO2 composite membrane is up to 8.0 MPa,increased by 36%compared with pure AN-MA membrane.Addition of nano-TiO2 can suppress macrovoid to a certain degree,resulting in a more u-niform pore structure.With the coagulation bath temperature rising,the mechanical properties of the composite membrane gradu-ally increased but flux decreased.

关 键 词：热致相分离 纳米二氧化钛 丙烯腈-丙烯酸甲酯基复合膜 复配稀释剂 凝固浴温度 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TB33