A Study of Organic Impurity Removal Efficiency for Waste LCD Touch Panel Glass by Solvents Types

Yubin Kang; Jin-Ju Choi; Jae Layng Park; Chan Gi Lee

doi:10.7844/kirr.2020.29.6.57

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2020 Vol.29, Issue 6 Preview Page Next Page

Research Paper

A Study of Organic Impurity Removal Efficiency for Waste LCD Touch Panel Glass by Solvents Types 폐 LCD 유리 재활용을 위한 용매 별 유기물 제거 효율에 대한 연구

31 December 2020. pp. 57-64

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Abstract

In this study, removal of OCA and organic impurities for recycling LCD touch panel glass was conducted by mechanical and chemical dissolution methode. Cut mill and oscillation mill were used for mechanical crushing of touch panel, and water, ethanol, dichloromethane were used to remove OCA and organic impurities. As a result of TGA, when applied only dicloromethane in the process, the efficiency of organic removal was to be best. In addition, removal effect of organic impurities increased as the cleaning temperature increased. As a result of zeta potential analysis to confirm the dispersion degree of touch panel glass in the solvent, the absolute value of the zeta potenial of water with the lowest cleaning effect was lower than other solvents, and it was confirmed that efficiency of organic removal is affected not only by the chemical dissolution properties but also the physical dispersion properties in the solvent.

Keywords

Waste display

LCD touch panel

OCA

Glass

Recycling

본 연구에서는 LCD 터치 패널 유리의 재활용을 위해 기계적 방법과 화학적 용해법을 혼용하여 OCA 및 유기 불순물을 제거하는 실험을 진행하였다. 터치 패널의 기계적 파분쇄를 위해 cut mill과 oscillation mill을 이용하였으며, OCA와 유기 불순물의 제거를 위해 물, 에탄올, 디클로로메탄을 이용하여 터치 패널 파쇄물을 세정하였다. 세정 이후 TGA를 통해 유기 불순물의 제거 효율을 평가한 결과 디클로로메탄 단일 용매를 사용한 경우 세정 효과가 가장 뛰어났으며, 세정 온도가 증가함에 따라 유기 불순물의 제거 효과가 증가함을 확인하였다. 제타 전위 측정을 통해 터치 패널 유리 파쇄물의 용매 내 분산도를 평가한 결과, 세정 효과가 가장 낮은 물의 제타 전위 절대값이 타 용매에 비해 낮았으며, 유기물의 제거 효과는 화학적인 용해 특성뿐 아니라 용매 내 물리적인 분산 특성에 의해서도 영향을 받을 수 있음을 확인하였다.

키워드

폐 디스플레이

LCD 터치 패널

OCA

유리

재활용

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Journal of the Korean Institute of Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 29
No :6
Pages :57-64
Received Date : 2020-11-06
Revised Date : 2020-12-08
Accepted Date : 2020-12-15
DOI :https://doi.org/10.7844/kirr.2020.29.6.57

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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