Abstract

Depletion of stratospheric ozone is expected to lead to an increase in the amount of UVB radiation present in sunlight. In addition to its well-known ability to cause skin cancer, UVB radiation has been shown to alter the immune system. The immune system is the body's primary defence mechanism against infectious diseases and protects against the development of certain types of cancer. Any impairment of immune function may jeopardize health by increasing susceptibility to infectious diseases, increasing the severity of infections or delaying recovery from infections. In addition, impaired immune function can increase the incidence of certain cancers, particularly cancers of the skin.

With careful use of protective clothing, skin damage can be reduced drastically. Medical experts frequently recommend the use of clothing for protection from UVR. Not all clothing, however, protects equally or adequately.

The base of solution could be SMARTtextiles with irradiance responsible fibre materials. SMART or INTELIGENT materials respond to environmental stimuli with particular changes in some variables. For that reason they are often also called responsive or adaptive materials. Depending on changes in some external conditions, adaptive materials change either their properties (mechanical, electrical, appearance), their structure or compositions, or their functions.

Mostly, SMART materials are embedded in systems whose inherent properties can be favourably changed to meet performance needs. The primary purpose of the proposed work is development of origin method and device for measurement of adaptive response on UV-VIS and NIR irradiance. This work is widely recognized as establishing the fundamental knowledge base for the creation of variety of new materials as sensors for application to basic textile structures, non-woven, and other related materials and their barrier properties against UV-VIS and NIR irradiance. Our objective is to use the special photo chromic and photo adaptive polymer, which has a response to above-mentioned part of electromagnetic irradiation.

Introduction

Reversible colour changing of some substances is well known effect. Name of this effect is chromism and if the effect is reversible colour change depending on temperature, name of this effect is thermo chromic. If is colour change affected on solution name is solvate chromism, light colour change dependence is named photo chromism, etc. This reversible colour change we can use as indicator of different stimulation and true colour measurement method we can quantify by this stimulation.

In present time we have on the market protective clothes, which give good insulation against hazardous substances and radiation. Obviously is on the market measuring systems for measuring dangerous substances and its concentration, respectively excessive intensity of radiation. On the other side we should solve transportation of these measuring systems, stress of acting persons (firemen, solders, etc.) during theirs actions from reason of weight and dimensions of measuring systems. This problem will solve integrated textile sensors, which will be flexible component of protective clothes. Potential possibilities of using textile-based sensors are now intensively studied in Laboratory Colour and Appearance Measurement (LCAM) of Department of Textile Materials of Technical University in Liberec, Czech Republic. In this study are present textile sensors with colour response on UV radiation and we will present studies of dynamic changes, stability of sensitivity these kinds of sensors. Also will be present study of moderating these sensors for different part of UV.