一种新的光致变色膜:Na₂WO₄-PAA-Glycerol体系研究

作者：尚通明; 贺竞辉; 韩敏; 石乃恩; 徐正

来源：无机化学学报, 2007, 23(01): 124-127.

DOI：10.3321/j.issn:1001-4861.2007.01.022

• WO3
• 多钨酸盐
• 光致变色
• PAA
• 智能窗

A method for preparing Na2WO4-PAA-Glycerol photochromic films was reported. The film was composed of Na2WO4, PAA and Glycerol, which were coated on a glass substrate. The film turned blue in the sun, and bleached to transparent in the darkness. The UV-Visible spectra showed strong absorbance at 300～500 nm, and the ABS changed signifanctly at 500～800 nm. The film showed the best photochromic behavior when Nna2wo4is 4%5%. The mechanism was suggested that after irradiation, poly tunstate produced by Na2WO4 and PAA formed the tungsten blues. The tungsten blues were bleached due to oxidation back to poly tunstate by oxygen. The film showed not only an excellent photochromism property with rapid response and good reversibility, but also the simple techniques and good stability.

• 单位
  南京大学; 江苏技术师范学院; 配位化学国家重点实验室