SPEEK复合膜在电解制备过硫酸铵中的应用

Application of SPEEK Composite Membranes in Electrosynthesis of Ammonium Persulfate

为达到减少电解制备过硫酸铵的能耗及提高电流效率的目的,从改良电解槽隔膜的角度出发,分别对几种自制复合膜的电解性能进行了考察和比较,并对它们的机械强度和支撑层的耐腐蚀性进行了测试。通过试验发现:聚酯滤布的耐电解液腐蚀性最好;以100目聚酯滤布为支撑层制得的磺化聚醚醚酮(SPEEK)复合膜机械强度最高;以50目聚酯滤布为支撑层制得的SPEEK复合膜的电流效率最高且单位电耗最低。综合考虑,以50目聚酯滤布为支撑层制得的SPEEK复合膜比较适合应用于电解制备过硫酸铵中,尽管它的机械强度不是最大,但是与不添加支撑层的纯SPEEK膜相比其机械强度有了明显的提高,而且具有较高的电流效率和比较小的能耗。

The novel SPEEK composite membranes used in the electrosynthesis of ammonium persulfate were made to decrease energy consumption and improve current efficiency.By testing the membrane＇s electrolytic properties,mechanical properties and corrosion resistance of the supporting layer,it is found that the corrosion resistance of polyester cloth was the best of all the measured materials.SPEEK composite membrane based on polyester cloth with 100 mesh counts exhibited the highest tensile strength;and the SPEEK composite membrane based on polyester cloth with 50 mesh counts obtained both the highest current efficiency and the lowest energy consumption.After all,the SPEEK composite membrane based on polyester cloth with 50 mesh counts is considered more appropriate to be applied in the electrosynthesis of ammonium persulfate,although its mechanical properties is not the best,the mechanical properties has been greatly improved compared with pure SPEEK membrane,and it also has a higher current efficiency and lower energy consumption.