1B1_0606_ PHOTOSWITCHABLE NANOMATERIALS FOR THE DESIGN OF LIGHT-RESPONSIVE SMART TEXTILES: FROM COATING TO ADVANCED FIBER-SPINNING TECHNOLOGY

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Tânia V. Pinto

P. Costa

C.M. Sousa

D.M. Fernandes

A. Guedes

C. Silva

M. F. R. Pereira

P.J. Coelho

C. Pereira

C. Freire

Published Aug 7, 2019

Abstract

This work reviews our recent achievements on a novel generation of UV/sunlight responsive silica nanoparticles (SiO2 NPs) and smart textiles. Photoresponsive organic – 2H-naphtho[1,2-b]-pyran (2H-NPT) and 3H-naphtho[2,1-b]pyran (3H-NPT) derivatives – and inorganic – phosphomolybdic acid (PMo12) – compounds were selected to tune the photochromic response and color palette range of the SiO2 NPs and corresponding smart textiles. The SiO2 NPs were functionalized by covalent post-grafting of 2H-NPTs and 3H-NPTs, and by non-covalent electrostatic immobilization of PMo12. The resulting hybrids were incorporated onto fabric substrates by screen-printing and within fibers through advanced fiber-spinning processes − wet spinning and melt spinning − at pre-industrial scale.


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