纳米ZnS/PVDF复合膜的制备及其光学性能  

Preparation and optical properties of nano-ZnS/PVDF composite films

作　　者：郑如兰[1] 邓海金[1] 李明[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《复合材料学报》2007年第6期26-30,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(10574078;50621201)

摘　　要：以醋酸锌（ZnAC2·2H2O）和聚偏氟乙烯（PVDF）为原料，N—N-二甲基甲酰胺为溶剂，采用溶胶一凝胶原位复合的方法制备纳米硫化锌／聚偏氟乙烯复合膜。x射线衍射和透射电镜分析表明，复合膜中的ZnS晶粒分布均匀，平均尺寸在3～7nm之间，具有明显的立方相结构。紫外-可见吸收光谱和荧光光谱分析表明，随着ZnS晶粒度的减小，复合膜的吸收边出现从310-270nm的蓝移，该复合膜中同时存在368nm的激子复合发光和429nm白激活发光。分散剂的加入不会对复合膜的荧光性能产生本质的影响，但可以使ZnS生长速度减慢，分散更均匀。A sol-gel in-situ method was used to synthesize the nano-ZnS/PVDF composite film by using ZnAC2·2H2O and PVDF as the primary materials, and DMF as the solvent. The results analyzed by XRD and TEM exhibit that the ZnS nanoparticles are well distributed in PVDF films and their size can be controlled in the range of 3 nm to 7 nm. The studies on the UV- VIS absorption spectroscopy show an observable blue- shift with the decrease of the crystal size of ZnS. The fluorescence spectroscopies indicate both the photoemission of recombination with the exciton peaking at 368 nm and the emission at 429 nm termed ＇ self- activated＇. The optical properties of this composite film are not essentially impacted by adding of dispersant, but the growth of ZnS is limited and the dispersity of these nanoparticles is improved.

关 键 词：纳米硫化锌 聚偏氟乙烯 原位复合 光致发光 

分 类 号：TB332[一般工业技术—材料科学与工程]