이산화질소(NO2) 농도에 따른 전통직물의 손상 특성
Damage Characteristics of Korean Traditional Textiles by Nitrogen Dioxide (NO2) Concentrations
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초록
이산화질소(NO2) 농도에 따른 전통직물의 손상특성을 정량적으로 확인하고자 가스 열화실험을 수행하였다. 견, 면, 모시, 삼베의 무염색직물 시편, 천연염색(적색, 황색, 청색, 흑색)직물 시편을 온도 20℃, 습도 50%, 환기횟수 1/hr 조건의 가스부식시험기 챔버 내에서 NO2 0.01, 0.1, 1, 10, 100, 1000 ppm 농도로 각각 1일 노출한 후 광학적, 화학적, 물리적 측정방법으로 손상도를 평가하였다. 이 결과, 전통직물은 NO2 1 ppm/day에서 색차 증가, 변퇴색등급 저하가 나타났고, 10 ppm/day에서 질산이온(NO3-) 농도 증가, pH 감소, 카르보닐기 및 C-NO2 작용기 증가가 나타났으며, 100 ppm/day에서 인장강도 감소가 나타났다. 또한 무염색직물에서는 견, 삼베의 색차 증가, 삼베의 NO3- 증가 및 인장강도 감소가 크게 나타났고, 염색직물에서는 청색, 황색직물의 색차 증가, 황색직물의 NO3- 증가, 삼베, 모시의 인장강도 감소가 크게 나타났다. 이를 통해 NO2에 의한 전통직물의 광학적, 화학적, 물리적 손상농도는 각각 1 ppm/day, 10 ppm/day, 100 ppm/day임을 도출하였다.
Abstract
The gas acceleration test was conducted to identify the deterioration of Korean traditional textiles caused by NO2. Total 20 specimens were prepared using 4 different materials (silk, cotton, ramie, hemp) after dyeing with 5 colors (undyed, red, yellow, blue, black). The specimens were exposed to 0.01, 0.1, 1, 10, 100, and 1000 ppm NO2 gas in the test chamber at 20℃, 50% RH for 1 day. Optical, chemical, and physical evaluation was carried out after the exposure. In the case of Korean traditional textile, color difference increased at 1 ppm/day, NO3- concentration, carbonyl and C-NO2 functional group increased while pH decreased at 10 ppm/day and tensile strength weakened at 100 ppm/day. when it comes to undyed textile, alteration of color difference on silk and hemp cloth, NO3- concentration and tensile strength on hemp cloth was remarkable. In addition, color difference on blue and yellow textile, NO3- concentration increase of yellow textile and tensile strength decrease of hemp cloth & ramie cloth were significant. The results suggest that critical NO2 concentration of optical, chemical, and physical damage on Korean traditional textiles are 1ppm/day, 10 ppm/day, 100 ppm/day respectively.
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