为了解决2ZnO·3B₂O₃·3H₂O (ZB-233)应用于印刷电路板(PCBs)阻燃使氯质量分数偏高导致电子器件发生腐蚀、漏电等问题,采用电渗析技术脱除氯并对实验因素进行探究与优化,得到了最佳工艺条件:电压为23 V、料浆质量分数为10%、电极液Na₂SO₄和NaNO₃浓度为0.03 mol/L;离子交换膜为亚斯通标准阴阳离子交换膜。在上述最佳工艺条件下,氯的脱除率可达87%,能耗为0.029 1 kW·h/kg,最终得到的低氯ZB-233产品可满足PCBs氯质量分数的要求。

When 2ZnO·3B₂O₃·3H₂O (ZB-233) is applied as flame retardant for printed circuit boards (PCBs),its high chlorine content can cause corrosion and electric leakage to happen to electronic devices.In order to solve these problems,the electrodialysis technology is utilized to remove chlorine,and the experimental factors are explored and optimized.The optimum chloring-removing process conditions are obtained as follows:the voltage is 23 V,the mass fraction of slurry is 10%,and the concentration of Na₂SO₄ and NaNO₃ in electrode solution is 0.03 mol·L^-1,and a standard anion exchange membrane is used as ion exchange membrane.Under the optimum process conditions,the removal rate of chlorine can reach 87% and the energy consumption is 0.029 1 kW·h·kg^-1.The purified ZB-233 product with low chlorine content can meet the requirements of PCBs.

周得文(1998-),男,硕士研究生,研究方向为阻燃剂的制备与纯化,934218381@qq.com