Thermochromic Filters Effect on Static Light

By Isabel Cabral and Antonio Pedro Souto.

Published by The International Journal of Visual Design

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Article: Print $US10.00
Article: Electronic $US5.00

Is it possible to change ambient light without acting upon the light source? Smart textile materials and new technologies open the possibility to introduce dynamic behaviour into elements that would normally be static. Using the ability of Colour Change Materials to react to external stimulus, this study shows how colour variation of textile samples, treated with reversible thermochromic pigments, filter the artificial light intensity that goes through them. In this work, a set of screen printing samples have been developed. Thermochromic pigments or a mixture of thermochromic and conventional pigments have been applied to the textile samples. Differences in light transmission are measured and correlated with two different processes employed in order to achieve similar colour when activated. Screen printings were developed with an overlapping of layers with different pigments or only one layer with a mixture of both types of pigments. The results indicate that a sample activated by heat may achieve a different light intensity, in terms of luminosity (dark colours absorb more than light colours) and according to the requirement of the pigments to absorb light in order to get colour.

Keywords: Dynamic Behaviour, Textile Filter, Light Intensity, Thermochromism

The International Journal of Visual Design, Volume 6, Issue 2, pp.55-64. Article: Print (Spiral Bound). Article: Electronic (PDF File; 2.943MB).

Isabel Cabral

PhD Student, Department of Textile Engineering, School of Engineering, University of Minho, Guimarães, Portugal

Isabel Cabral has an Industrial Design Degree from ESAD–High School of Arts and Design in Caldas da Rainha, Portugal; a Master’s in Space, Product and Communication Design from UPC–ETSEIB-Technical High School of Industrial Engineering of Barcelona, Spain; and was recently accepted in Textile Engineering Doctoral Program at the University of Minho–School of Engineering, Guimarães, Portugal. Cabral has also been in The Swedish School of Textiles in Boras, Sweden, as a guest researcher, where Cabral has developed a project that crosses 3 areas: product design, smart textiles and origamis. These are the main interests of her work, researching dynamic behaviour through a textile dimension and exploring functional and expressive qualities with Smart Textiles Origami.

Prof. Antonio Pedro Souto

Auxiliary Professor, Department of Textile Engineering, School of Engineering, University of Minho, Guimarães, Portugal

António Pedro Souto has a PhD in Textile Chemistry, from Textile Engineering Department, Universidade do Minho, Guimarães, Portugal; a MSc in Textile Technology at Textile Engineering Department, Universidade do Minho, Guimarães, Portugal; 1st degree in Chemistry, by Universidade de Coimbra. António Pedro Souto’s interests include the application of plasmatic radiations (DBD) in the processing of textiles materials, the redesign of wet processing of cellulosic materials, the evaluation of physical and chemical mechanisms involved in dye application, reticulation resins and other functionalising finishing products, and application of smart materials in textile substrates to improve/implement new functionalities with the aim to obtain new products. António Pedro Souto has a Patent: Carneiro, N.; Souto, A.P.; Forster, F.; PRINZ, E.-Continuous and semi-continuous treatment of textile materials integrating CORONA discharge, nº PCT/PT2004/000008 (2004). António Pedro Souto has awards for his role as coordinator of the project “Space without Smoke” that include: 2nd-Physical Science Contest-Elgra’s Student Contest, 5th Student Parabolic Campaign sponsored by European Space Agency, 2002; 1st-V Encontro Nacional de Estudantes de Física, Núcleo de Física do Instituto Superior Técnico em Lisboa, Portugal, 2003; and Honorable Mention “water carpet-carbon to diamond” in CORAM Sustainable Design Award in 2 February de 2006.