聚二炔/纳米氧化铜复合物可逆热致变色性能及应用
New Chemical Materials（2022）
Abstract
在二炔单体自组装过程中掺杂纳米氧化铜粒子,经紫外光(λ=254nm)照射聚合得到蓝色聚二炔/纳米氧化铜(PDA/CuO-NPS)复合物.在未聚合分散液中加入一定浓度的聚乙烯醇(PVA)水溶液,制备均匀的热致变色PVA/PDA/CuO-NPS薄膜.结果表明,PDA/CuO-NPS复合物具有蓝色到紫色再到红色的颜色转变特性,随着光聚合时间增加,分子内应力增加,变色温度由60℃降低为50℃.降温后分散液颜色迅速恢复到紫色,618nm处的峰值显著提高.通过与聚乙烯醇的交联,得到的PVA/PDA/CuO-NPS薄膜两步变色温度分别升高到约50℃和约85℃,并在红色(30℃)和黄色(90℃)之间可逆转换,经过多次循环后仍具有良好的可逆热致变色性能.
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