%0 Journal Article
%T Thermochromic Biopolymer Based on Natural Anthocyanidin Dyes
%A Detlef L£¿tzsch
%A Ralf Ruhmann
%A Arno Seeboth
%J Open Journal of Polymer Chemistry
%P 43-47
%@ 2165-6711
%D 2013
%I Scientific Research Publishing
%R 10.4236/ojpchem.2013.33009
%X <p align=\"justify\">
	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.
</p>
%K Thermochromism
%K Biopolymer
%K Anthocyanidin
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=35299