薄膜液晶顯示器玻璃基板與液晶處理技術之研究

A study on the treatment technology of glass substrate and liquid crystal in Thin Film Transistor - Liquid Crystal Display (TFT-LCD)

邱姝萍(Shu-Ping Chiu)

指導教授 ： 張添晉

國立臺北科技大學/工程學院/環境工程與管理研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00052

摘要

全球對於薄膜液晶顯示器(TFT-LCD)的需求量逐年增加，而薄膜液晶顯示器(TFT-LCD)主要運用於電子及資訊產品，然而，儘管目前處理廢薄膜液晶顯示器(TFT-LCD)之主要方式為掩埋處理，但此處理方式之成本高，並可能對環境造成二次污染，所以此方法不可用以長期解決廢薄膜液晶顯示器(TFT-LCD)，因此，妥善處理和回收廢薄膜液晶顯示器(TFT-LCD)中之玻璃基板和液晶極具重要意義。
經文獻蒐集得知，廢液晶可藉由超臨界二氧化碳、有機溶劑、熱析出及超聲波結合丙酮溶劑等方式進行萃取分離；廢玻璃基板與廢偏光膜可透過熱衝擊、冷熱衝擊、熱裂解、有機溶劑及風選等方式使其分離，而分離後之廢玻璃基板則可做為混泥土磚、透水磚及發泡玻璃等再利用。
研究結果顯示，廢液晶之最適處理技術為利用丙酮溶劑將液晶由廢液晶面板中取出，再將取出後之液晶進行調配、純化，以製成客製化配方供面板廠商使用，而廢玻璃基板之最適處理方式為利用粉碎機將其破碎，透過風選方式將玻璃基板與偏光膜分離後，偏光膜可做為冶煉爐之還原劑等；廢玻璃基板(不含液晶、偏光膜)則可做為道路材料或土木建築材料使用。

關鍵字

薄膜電晶體液晶顯示器 ； 廢玻璃基板 ； 廢液晶 ； 最適處理技術

並列摘要

The demands for TFT-LCDs are increasing globally year by year, and the TFT-LCD is mainly applied on electronic and informative products, however, the major waste TFT-LCDs processing is landfill which has features of high cost and high risks of secondary pollution, thus, this processing method should not be the permanent way for waste TFT-LCD. Therefore, the proper processing and recycling of glass substrates and liquid crystals of waste TFT-LCDs have major significance.
Through literatures analysis, it is learnt that extraction separation of waste liquid crystals could be performed by supercritical carbon dioxide, organic solvent, thermal precipitation and ultrasonic with acetone solvent methods; and the extraction separation of waste glass substrates and polarizing films could be implemented by thermal shock, pyrolysis, organic solvent and winnowing, and the separated waste glass from TFT-LCDs could be recycled and used as materials for concrete bricks, biological bricks, foamed glass and so on.
The results from this study showed that the optimum waste liquid crystals processing technique is to use acetone solvent to extract liquid crystals from waste TFT-LCDs, and carry out the purification and tempering of the extracted liquid crystals to make them as custom compound formula for application of TFT-LCD factories. As for the optimum waste glass substrates processing method, they should be grinded by grinders initially and separate glass substrates with polarizing films by winnowing, thereafter, polarizing films could be used as reducing agents in smelting furnaces; and waste liquid crystal panel glass could be used for road and construction materials.

並列關鍵字

Thin film transistor - liquid crystal display ； waste glass substrate ； waste liquid crystal ； the best process technique

參考文獻

【5】 陳浩彰，液晶顯示器面板廠商營運績效與產業結構、策略行為之研究，碩士論文，國立臺灣大學經濟學研究所，臺北，2006。

【16】 盧志文，「液晶顯示器驅動電路介紹」，研究報告，國立暨南國際大學，南投，2005。

【19】 傅永達，廢液晶面板最適處理模式之研究，碩士論文，國立臺北科技大學環境工程與管理所，臺北，2009。

【31】 Robert A,Shanks, Daniel Staszczyk, “Thermal and Optical Characterization of Polymer-Dispersed Liquid Crystals”, International Journal of Polymer Science, 2012.

【60】 財團法人光電科技工業協進會網站，http://www.pida.org.tw/，2014。