超疏水表面水下电解补气方法研究

Research on gas replenishment for submersed superhydrophobic surface by electrolysis

利用石墨电极电解装置,研究了人工海水电解过程中电流随电极极距和数目的变化规律,并观察了矩形管道中电解装置在不同工作电压下超疏水表面的气膜状态,验证了超疏水表面电解补气的可行性。结果表明:电解装置工作过程中电压与电流呈线性关系,在电压一定的条件下,电流随电极数目的增加而增加,随极距的增加而减小。计算电解效率后发现,增加电极数目虽然有利于提高电流,但是电解效率却有所下降。在湍流流动中,观测到超疏水表面气膜在水流冲刷下破坏消失,当电解装置在低电压下工作时,产气量较小,补气装置呈间歇工作状态,并只能使部分超疏水表面气液界面恢复;当增加电压后,电解装置产气量增加,可以观察到更加明显的镜面现象,证明了超疏水电解补气装置的可行性。

The variation of current with electrode pole distance and number during artificial seawater electrolysis is studied by using the graphite electrode device.The plastron state on the superhydrophobic surface replenished by the electrolysis device under different working voltages in the rectangular pipeline is observed,which proves the feasibility of this method.The results show that:There is a linear relationship between the voltage and the current are linear in the working process of the electrolyzer.Under a constant voltage,the current increases with the electrodes number and decreases with the pole distance.Study on the electrolysis efficiency shows that increasing the electrodes number is advantageous for increasing the current,but decreases the electrolysis efficiency.It is observed that the superhydrophobic surface plastron disappears under the scouring of turbulent flow.When the electrolyzer is operated at a low voltage,the gas production is not enough and the gas supply device works intermittently.The gas-liquid interface recovers partly on the superhydrophobic surface;When the voltage is increased,the gas production increases and a more obvious specular phenomenon can be observed,which proves the feasibility of the superhydrophobic electrolytic gas replenishment.