有机溶剂中温法溶出光伏组件封装材料乙烯-醋酸乙烯酯

采用有机溶剂邻二氯苯中温法溶出模拟光伏组件的封装材料乙烯-醋酸乙烯酯（EVA）,探究了不同条件下EVA的溶出率及模拟组件的分离率,通过正交实验确定了有机溶剂中温法处理EVA的最佳条件。实验结果表明,在反应温度160 ℃、固液比（光伏组件个数与邻二氯苯体积之比,个/mL）4∶100、搅拌转速800 r/min、反应时间240 min的最佳条件下,EVA的溶出率为95.0%,模拟组件的分离率达100%。各影响因素的主次顺序为反应温度>反应时间>搅拌转速>固液比。反应前后邻二氯苯的主要官能团未发生变化。

Study on EVA dissolution from the solar panel by an organic solvent at medium temperature

We had studied the dissolution rate and separation rate of the ethylene vinyl acetate （EVA）,which is the photovoltaic module’s packaging material. By using an o-dichlorobenzene at medium temperature for a simulated system under different conditions. Meanwhile,the process’s optimal conditions were determined using the orthogonal experiment. Nonetheless,the EVA dissolution rate is 95.0% and the separation rate can reach 100% under the optimal conditions of 160 ℃ reaction temperature,a solid-liquid ratio of 4∶100,a stirring speed of 800 r/min,and a reaction time of 240 min. Moreover,those factors’ effects are ranked as the following：the reaction temperature > reaction time > stirring rate > solid-liquid ratio. Finally,o-dichlorobenzene’s main functional groups did not change before and after the reaction.