Time-temperature chromatic sensor based on polydiacetylene (PDA) vesicle and amphiphilic copolymer

Polydiacetylene (PDA) is an excellent color-changing inclicatoi. In this paper, we demonstrate a new and interesting kind of time-temperature chromatic sensor based on PDA vesicle and amphiphilic polymer In presence of amphiphilic polymers, PDA vesicles could gradually transit from blue to red, which was irreversible and regularly depended on the temperature, time, and pi perms of amphiphilic polymer (including the concentration, molecular weight, molecular structure, hydrophobicity, and thermosensitive property) Higher concentration of amphiphilic polymers resulted in lower color-transition temperature and faster color-transition Also, higher temperature led to faster color-transition The color-changing of PDA/amphiphilic polymer matrix may have resulted from the higher temperature and gradual insertion of amphiphilic polymer into PDA, synergistically pertutbing the conformation of PDA The prepared PDA/F127, PDA/F68, PDA/L35 and PDA/Tween-20 aqueous matrix showed potential application in time-temperature chromatic sensors at around 10-50 degrees C This work provides a new method to design time-temperature chromatic sensors (C) 2010 Elsevier B V All rights reserved