Robust Color Fastness of Dyed Silk Fibroin Film By Coupling Modification Dyeing with Aniline Diazonium Salt

By : Zongqian Wang, Haiwei Yang, Jian Xing, Zhi Liu,

Page No: 149-159

Abstract
Colored silk fibroin (SF) film can change the proportion of transmitted light composition and therefore shows potential application in optoelectronics area. However, few methods are reported for the preparation of colored SF film with good color fastness. Herein, colored SF film was prepared by coupling modification dyeing (CM-dyeing) of SF tyrosine residues in solution. SF film shows excellent color fastness due to the formation of the azo covalent bond formed by electrophilic substitution reaction between SF tyrosine residues and aniline diazonium salt. Furthermore, compared with the undyed film, the dyed SF film is effectively preserved its mechanical property by the mild dyeing conditions (up to 99.02 % on average). Therefore, this facile method presents an alternative approach to construct colored SF film with outstanding performance and benefits its relevant applications.

Authors :
Zongqian Wang, Haiwei Yang, Jian Xing and Zhi Liu
School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
 

DOI: https://doi.org/10.32381/JPM.2019.36.02.4