Direct coloration of textiles with photochromic dyes. Part 2: The effect of solvents on the colour change of photochromic textiles

S. M R Billah, Robert M. Christie, Keith M. Morgan

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Polyester, acrylic and nylon textile substrates dyed with two spirooxazine dyes, 1,3,3-trimethyl-spiroindoline-2,3'-3H- naphth[2,1-b ][1,4]oxazine (1a) and 6'-piperidino-1,3,3- trimethyl spiroindoline-2,3'-3H-naphth[2,1-b][1,4]oxazine (1b), exhibit significantly higher photochromic colour build-up when wet compared with after drying. A study of this phenomenon, extended beyond water to the influence of a series of selected organic solvents on photochromic behaviour, using colour measurement of the photochromic textiles under controlled ultraviolet irradiation conditions, is reported. The results of molecular modelling calculations (AM1 in water and PM5 in water) have been used as a means of interpreting the observed effects, in conjunction with qualitative arguments based on solvation and fibre swelling. © Journal compilation © 2008 Society of Dyers and Colourists.

Original languageEnglish
Pages (from-to)229-233
Number of pages5
JournalColoration Technology
Volume124
Issue number4
DOIs
Publication statusPublished - Aug 2008

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