铕芳香二酰基配合物修饰木质基发光材料的制备及性能研究

Investigation on preparation and properties of wood-based luminescent materials modified by europium aromatic diacyl complexes

木材成本低、可再生,是优良的绿色工程材料和工业原料,但其存在结构疏松、易燃、易老化等缺点,需要对其进行表面改性使其功能化,以提高表面性能,延长使用寿命。用胺丙基硅烷改性的铕芳香二酰基配合物来修饰木材,使其木材表面具有一定的荧光性。结果表明,改性铕配合物与木材表面的羟基发生键合;通过荧光光谱分析表明,经过改性稀土配合物的处理,木材表面具有发光特性;分析反应条件对试样荧光性能的影响可知,在反应浓度为15g/L、反应温度为50℃和反应时间为12h时试样荧光强度最高。接触角和热性能测试表明稀土配合物对木材表面的改性可以提高木材的疏水性和热稳定性。

Renewable and cheap wood is an outstanding green engineering material and industrial raw material. But the wood has many shortcomings, such as loose structure, easy flaming, easy aging, and so on. In order to improve the surface properties and extend the useful time, wood surface need to be functionally modified. In this paper, wood surface was decorated by the silane-modified europium aromatic diacyl complexes, which gave wood better fluorescence. The results show that the reaction combined between silane-modified europium corn plexes and the hydroxyls on the wood surface. With the influences of reaction condition on fluorescence of wood surface analyzed, the fluorescence emission intensity are most when the reaction concentration is 15 g/L, the re action temperature is 50℃ and the reaction time is 12 h. The test of contact angle illustrates that the modifica tion of europium complexes could improve the hydrophobicity of wood. Likewise the results of DSC and TG show the thermal stability of wood was improved with the modification of europium complexes.