Thermochromic Biopolymer Based on Natural Anthocyanidin Dyes

• 作者: Arno Seeboth Detlef L?tzsch Ralf Ruhmann
• 来源期刊: 高分子化学期刊(英文)
• 学科: 化学
• 关键词: THERMOCHROMISM BIOPOLYMER Anthocyanidin
• 年，卷（期）: 2013,（3）
• 页码范围: 43-47
• 页数: 5页
• 分类号: O6

摘要

Recently a novel thermochromic poly(lactic acid) (PLA)-composite material was presented. Depending on temperature the incorporated anthocyanidin dye was found to be present either in its neutral or anionic anhydrobase form. A reversible formation of PLA-dye complexes triggered by conformational changes of the polymer backbone was proposed to explain this thermochromic effect. In order to study the influence of the dye structure on the PLA-dye complex formation and on the thermochromic properties of the PLA-composite material a variation of the anthocyanidin dye structure was investigated. The results indicate that a hydroxyl group in 3’-position of the anthocyanidin dye resulting in the presence of adjacent hydroxyl groups is mandatory for the PLA-anthocyanidin dye complex formation and thus for the occurrence of thermochromism.