Green Synthesis of Hybrid Material of Polyurethane/TiO₂ Composite and a Preliminary Study on Its Fluorescence Property

Polyurethane (PUTN) was synthesized by a non-poisonous and non-harmful method and the hybrid composite material of PUTN/TiO2 was prepared by mixing the solution of PUTN in tetrahydrofuran with nanoparticles of TiO2 dispersed homogeneously in absolute alcohol.The intermolecular structure of the new composite material was characterized by FTIRS and differential scanning calorimetry before and after the hybridization.Good electrochemical stability and reversibility of the new composite material were shown by the results of cyclic voltammetric study.It was found that the maximum emission wavelength of PUTN/TiO2 composite material lies at 404 nm which is same as that of the nanotitanium oxide.Effects of size of the nanoparticles of TiO2 and its mass fraction in the composite and time of ultrasonic vibration in mixing the 2 components on the fluorescence property were studied in detail.As shown by experimental results,best functional property of this new composite material was attained when the mass ratio of nanotitanium oxide to polyrethane used was 100 to 7,and the time of ultrasonic vibration taken was 5 min.In addition,the fluorescence property of the PUTN/TiO2 membrane as affected by using different solvents was also studied.