紫外光交联CdS-聚氨酯膜的制备及荧光特性研究

合成了CdS－聚氨酯（带不饱和端基）紫外光交联复合物膜，采用红外、DSC、DTA、X-ray衍射对交联膜进行了表征。探讨了Cd^2 与高分子链之间的配位作用，CdS粒子对聚氨酯Tg和结晶度听影响，着重研究了CdS含量、光固化时间、通H2S量和Zn^2 对CdS－聚氨酯膜的荧光发射位置和强度的影响。

SYNTHESIS AND FLUORESCENCE OF UV-CROSS-LINKING CdS-POLYURETHANE COMPLEX

CdS-Polyurethane (with unsaturated end groups) complex was synthesized. The membranes made by curing complex with UV light are semitransparent, uniform, having good mechanical flexibility and thermal stability and their fluorescence spectrums remain unchanged after 30 days. The thin membrane exhibits intense red light at 700 nm under UV excitation at room temperature. The emission intensity increases nearly linearly with the increasing of CdS content, and no significant concentration-quenching phenomenon was observed at the CdS content of 0.25~5.0 mass percent. The add of ZnS has no significant influence on the emission intensities of the CdS-Polyurethane membranes, however, fluorescence spectrum turns wider in the presence of ZnS. This character may be used to adjust fluorescence wavelength.