改性乙二胺/氯化铜复合材料制备及其温敏变色性能

Preparation of Modified Ethylenediamine/Copper Chloride Composite and Its Thermochromic Properties

摘要:

采用硅溶胶-凝胶法改性乙二胺氯化铜络合物，制备了一种具有温敏连续多变色性能的改性乙二胺/氯化铜复合材料。探讨了溶胶组分中正硅酸四乙酯用量对复合材料的稳定性以及引发剂盐酸对其温变色性能的影响，研究改性乙二胺/氯化铜复合材料温敏变色机理。结果表明：在120℃复合材料水配体被取代，发生从无色到黄色的颜色变化，在160℃时水分子重新与中心铜离子配位，同时氮配体发生质子转移，复合材料颜色由黄色变为蓝色。正硅酸四乙酯改性后复合材料有较好的稳定性，随着盐酸浓度增加，氯离子配位几率增大，改性乙二胺/氯化铜复合材料颜色转变更深。

Abstract:

A modified ethylenediamine/copper chloride composite with temperature-sensitive continuous multi-color property was prepared by silica sol-gel modification of ethylenediamine copper chloride complex. The ef-fects of the amount of tetraethyl orthosilicate in the sol component on the stability of the composite and the thermochromic properties of the initiator hydrochloric acid were investigated. The thermosensitive col-or change mechanism of the modified ethylenediamine/copper chloride composite was studied. The re-sults show that the water ligand of the composite material is replaced by colorless to yellow color change at 120 ℃. At 160 ℃, the water molecules re-coordinate with the central copper ion, and the nitrogen ligand undergoes proton transfer. Change from yellow to blue. The modified tetraethyl orthosilicate has better stability. With the increase of hydrochloric acid concentration, the coordination probability of chloride ion increases, and the color conversion of modified ethylenediamine/copper chloride composite material is deeper.