TiO2/海藻酸钙复合膜的制备表征及力学性能  

Characterization and Mechanical Properties of Titanium Dioxide and Alginate Composite Membrane

作　　者：傅轶凡[1,2] 冯灵智[2] 赵孔银[1,2] 李志辉[2] 徐赛 魏俊富[1,3] 

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室 [2]天津工业大学材料科学与工程学院 [3]天津工业大学环境科学与化学工程学院,天津300387

出　　处：《高分子材料科学与工程》2015年第4期87-91,共5页Polymer Materials Science & Engineering

基　　金：国家高技术研究发展计划(863计划)(2013AA065601);国家自然科学基金资助项目(51103102;41301542);博士点新教师基金(20111201120004);天津市科技支撑计划重点项目(13ZCZDGX00500)

摘　　要：将Ti O2与海藻酸钠充分混合配制成铸膜液,在玻璃板上刮膜,经钙离子交联制备Ti O2/海藻酸钙(T/CA)复合膜,并对其进行扫描电镜、透射电镜和红外表征。研究湿态T/CA复合膜经过紫外辐照前后的力学性能,以及复合膜对甲基橙染料的重复降解性能。结果表明,T/CA复合膜的力学强度与降解前相差不大,海藻酸盐大分子虽部分降解但仍可以被钙离子交联生成与降解前强度相差不大的凝胶。分析了紫外照射前后复合膜力学性能不变的原因。该复合膜制备工艺简单,成本低,经过紫外照射后仍保持优良的力学性能,重复使用10次后还能达到第1次降解率的97.6%。Ti O2 and sodium alginate were mixed to obtain the casting solution,which formed Ti O2/calcium alginate( T/CA) composite membrane using Ca Cl2 as gelling agent. The T/CA composite membrane was characterized by SEM,TEM and FT-IR. The mechanical properties of T/CA composite membrane in wet state before and after UV irradiation were investigated. The repeated photocatalytic degradation performance T/CA membrane was also researched. The results show that the strength of T/CA membrane is almost the same as that of hydrogel before photocatalytic degradation because alginate molecules could be crosslinked by Ca2 +ion repeatedly even the external alginate degraded. The reasons why the mechanical properties of the composite film are the same before and after UV irradiation are analyzed. Anyway,T/CA membrane is easy to be prepared,and the cost is low,and has excellent mechanical properties under UV irradiation. The photocatalytic degradation ratio of methyl orange can retain 97. 6% of the first even the composite film is reused for 10 times.

关 键 词：二氧化钛 海藻酸钙 复合膜 力学性能 光催化降解 重复使用 

分 类 号：TQ317[化学工程—高聚物工业]