对氧气含量进行控制可以利用电化学法,高效安全的同时无其余副产物的生成。传统电化学控氧技术的除氧装置以气体扩散电极与液体电解质为主要组成部分,电极会随着运行时长的增加而发热,并且液体电解质对于装置的密封性要求极高,稍有不慎则会出现漏液等问题。以丙烯酸(AA)为原料,通过N,N-亚甲基双丙烯酰胺(MBA)交联和过硫酸钾(K2S2O8)引发形成凝胶聚合物,将KOH溶液作为电解质分散于凝胶三维网络中,从而制得碱性凝胶聚合物电解质。结果表明:凝胶电解质最佳配比为4mol/L KOH、6g AA、0.5g MBA、6% K2S2O8,此时的离子电导率为2.05×10-1S/cm,且降氧速率为5mL/min,即装置内部氧浓度每下降1%所需要的时间大约为4min。
Electrochemical methods can be used to control the oxygen content,which is efficient and safe without the generation of other by-products.The oxygen removal device of traditional electrochemical oxygen control technology is mainly composed of gas diffusion electrode and liquid electrolyte.The electrode will heat with the increase of running time,and the liquid electrolyte has high requirements for the sealing of the device,and a little carelessness will cause leakage and other problems.In this paper,acrylic acid (AA) was used as a raw material to form a gel polymer by crosslinking with N,N-methylenebisacrylamide (MBA) and the initiation of potassium persulfate (K2S2O8).The potassium hydroxide (KOH) solution was dispersed in the three-dimensional network of the gel as an electrolyte to obtain an alkaline gel polymer.The experimental results showed that the optimum ratio of the gel electrolyte was KOH 4mol/L,AA 6g,MBA 0.5g,K2S2O8 6wt%,at which the ionic conductivity was 2.05×10-1S/cm,and the oxygen content decline rate was 5mL/min,meaning that the time required for each 1% decrease of oxygen concentration in the device was about 4min.
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基金资助
陕西省重点研发项目(2023-YBGY-448);榆林市科技计划项目(CXY-2022-160)
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