十二烷基硫酸钠清洗法去除废弃液晶显示器中的液晶  

Removal of Liquid Crystal from Waste Liquid Crystal Display by Cleaning Method of Sodium Dodecyl Sulfate

作　　者：张刚[1] 徐金球[1] 

机构地区：[1]上海第二工业大学文理学部,上海201209

出　　处：《上海第二工业大学学报》2015年第2期96-103,共8页Journal of Shanghai Polytechnic University

摘　　要：液晶显示器(Liquid Crystal Display,LCD)是电视、电脑和手机等电子产品的重要部件,其中所含的液晶属于高分子有机化合物。采用表面活性剂十二烷基硫酸钠(Sodium Dodecyl Sulfate,SDS)清洗法对废弃LCD中液晶的去除进行了研究。在SDS浓度为1.0 g/L、清洗时间为30 min、清洗温度为50℃的条件下对LCD玻璃基板上的液晶进行了清洗,液晶的去除率高达99.6%。采用BaCl2投加法结晶析出清洗液中的液晶,在Ba Cl2浓度为1.33 g/L的条件下,清洗液中总有机碳(Total Organic Carbon,TOC)的去除率为97.0%,表明液晶几乎全部结晶析出。LCD （Liquid Crystal Display） is the important parts of TV, computer, mobile phones, and other electronic products. The liquid crystal in LCD belongs to the high molecular organic compounds. SDS（Sodium Dodecyl Sulfate） as surfactants was used to clean liquid crystal from waste LCD and removal rate of liquid crystal reached 99.6 % under the conditions of 1.0 g/L of SDS dosage, 30 min of cleaning time, 50 ℃ of temperature. BaC12 was used to precipitate the liquid crystal from the cleaning solution and removal rate of TOC reached 97.0 % under the conditions of 1.33 g/L of concentrations of BaC12. This result indicates that almost all of the liquid crystal was precipitated.

关 键 词：十二烷基硫酸钠 液晶显示器 液晶 清洗 析出 

分 类 号：X705[环境科学与工程—环境工程]