Synthesis and Characterization of Rare Earth/Polyurethane CompositeMaterial

摘要

The organic ligand sulfosalicylic acid (SSA) which was selected as molecular bridge forsensitization of terbium ions was modified by thionyl chloride (SOCl_2) and 3-ammonium propyltriethoxy silane (APTES) to obtain the hybrid precursor SSA-Si. Then the solution of Tb(NO_3)_3was added in the presence of tetraethylorthosilicate (TEOS). The binary lanthanideorganic/inorganic hybrid material was obtained. The ternary hybrid material was obtained byadding the solution of Tb(NO_3)_3 and polyurethane. We investigated the thermal stability andluminescence properties of hybrids and found that the ternary hybrid materials exhibit better thermalstability and stronger emission intensity. Furthermore, compared with the binary mesoporousmaterial Tb-(SSA-Si)_3, the ternary mesoporous material Tb-(SSA-Si)_3-PU exhibits the characteristicemission of the Tb~(3+) ion with a higher luminescence intensity, suggesting that the introduction ofpolymer polyurethane into the mesoporous matrix is of benefit for the sensitization of Tb~(3+)luminescence, by replacing H_2O groups that can quench the luminescence of Tb~(3+) ion.