The Effect of the Accelerated Laboratory Ageing Factors on Linen Textiles Dyed with Turmeric Dye

Mahmoud Abd Elhameed,Wael Mohamed,Mohamed Marouf,Walaa Abdel Wahab

doi:10.21608/arcs.2021.71826.1013

Mahmoud Abd Elhameed, Wael Mohamed + Show 2 more

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https://doi.org/10.21608/arcs.2021.71826.1013

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Abstract

Archaeological linen textiles in uncontrolled museums are exposed to many different damage factors. It is noticed in some Egyptian Museums that the differences in temperature and use of inappropriate light bulbs are the most enemies of dyed historical textiles. This article presents interesting results about the effect thermal and light ageing on optical, chemical and mechanical characterization of dyed linen textiles. New linen textiles are prepared and dyed with Turmeric similar to the ancient linen textiles. The new linen textiles were exposed to artificial heat and light ageing. A close examination was conducted by scanning electron microscope (SEM) and stereo microscope. Fourier transform infrared spectral analysis (FTIR) and CIE-Lab values according to ASTM method D5035 were applied. Among the most prominent results of the study was the appearance of oxidation and hydrolysis bands of cellulosic materials due to ageing process, in addition to the appearance of some bands that express a defect in the chemical structure of cellulosic materials, such as the spectral range at 435 cm-1.

Highlights

Archaeological textiles are very sensitive organic materials since they are very prone to damage and deterioration when exposed to uncontrolled museum conditions such as light, heat, humidity, pollution and microorganisms
Thermal aging processes are widely used in order to predict the life of polymers in their working conditions based on the decomposition of data collected at high temperatures, and this approach depends on the assumption that the degradation process is governed by one mechanism over the studied temperature range, and provides this type of aging information on the kinetics of slow decomposition reactions over a short period of time [5], The aging process is carried out by exposing the material in a suitable climatic room to harsh conditions in terms of temperature and humidity for a period of time
Examination using (SEM) revealed the occurrence of severe drying and exfoliation of the turmeric-dyed linen samples as a result of thermal aging, as well as the occurrence of breakage in the fibers as a result of exposure to light aging as shown in Fig. 2. 3.2.The effect of ageing conditions on the Mechanical Measurements The literature refers to the changes in the tensile strength as a mechanical property, that reflects the changes in crystalline orientation and the chemical structure of the polymer system, and its morphology

Summary

Introduction

Archaeological textiles are very sensitive organic materials since they are very prone to damage and deterioration when exposed to uncontrolled museum conditions such as light, heat, humidity, pollution and microorganisms. In other words, they are extremely vulnerable to decay when stored or displayed in inappropriate environmental conditions. Thermal aging processes are widely used in order to predict the life of polymers in their working conditions based on the decomposition of data collected at high temperatures, and this approach depends on the assumption that the degradation process is governed by one mechanism over the studied temperature range, and provides this type of aging information on the kinetics of slow decomposition reactions over a short period of time [5], The aging process is carried out by exposing the material in a suitable climatic room to harsh conditions in terms of temperature and humidity for a period of time. Experimental decomposition or what is called an accelerated aging is performed on modern materials in an attempt to simulate historical and archaeological materials, and the group of aging processes that take place on textile materials are mostly physiochemical methods including dry thermal aging, wet thermal aging, exposure to ultraviolet rays, decomposition with acids or alkalis, or exposure to air pollutants such as ozone gas O3

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