Porous separator, manufacturing method thereof, electrode unit for producing hypochlorous acid water, and hypochlorous acid water producing device using the same
A technology of hypochlorous acid water and electrode unit, which is used in diaphragms, electrochemical water/sewage treatment, electrolysis components, etc.
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Embodiment 1
[0183] As the electrode base material 21 , a flat titanium plate having a plate thickness T1 of 0.5 mm was prepared.
[0184] By using the titanium plate according to the Figure 7A to Figure 7F Etching is performed in the same manner as the procedure shown in the fabrication process with figure 1 Electrode 20 having the same configuration. In the electrode 20, the thickness of the region including the small-diameter first hole 40 (depth of the first hole) is 0.15 mm, and the thickness of the region including the large-diameter second hole 42 (depth of the second hole) 0.35mm. The first hole 40 is made into a square, and the apex of the square is rounded, but one side R1 of the square obtained by extrapolating the straight line is 0.57mm. The second hole 42 is made into a square, and the apex of the square is rounded, but One side R2 of the square obtained by extrapolating the straight line portion was 2 mm. The width W1 of the linear portion formed between the adjacent fi...
Embodiment 2
[0192] A water dispersion mixture of titanium oxide particles and polyvinylidene fluoride particles having a particle diameter of 100 to 500 μm was coated on a glass cloth having a thickness of 100 μm as a porous separator, and dried. It was further soaked in a 5% isopropanol solution of tetraisopropoxy zirconium (IV), and then released to the atmosphere. Drying was performed at 80° C. for 1 hour in the air to produce a porous separator. Observation of the cross-section of the porous separator by SEM shows that there are many inorganic oxides on the surface and the pore surface, and the pore diameter is small. The zeta potential at pH 4 on the surface of the porous separator was -12 mV.
[0193] Electrodes were formed in the same manner as in Example 1, except that the above-mentioned porous separators were used instead of the porous separators produced by coating and firing the porous separator coating materials on the first and second electrodes respectively. unit. Use th...
Embodiment 3
[0196] Porous polystyrene with a thickness of 5 mm was prepared. While ultrasonic waves are applied to an aqueous dispersion of zirconia particles having a particle diameter of 100 to 500 μm to disperse them in the porous polystyrene, suction filtration is performed alternately from both sides to adsorb the zirconia particles in the pores. Figure 5 The pH dependence of the zeta potential of zirconia is shown in . Wet in a 5% solution of zirconium(IV) tetraisopropoxide in isopropanol and lifted to the atmosphere. Drying was performed at 80° C. for 1 hour in the air to produce a porous separator.
[0197] Electrodes were formed in the same manner as in Example 1, except that the above-mentioned porous separators were used instead of the porous separators produced by coating and firing the porous separator coating materials on the first and second electrodes respectively. unit. Use this electrode unit to make a figure 1 An electrolysis device of the same configuration.
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Abstract
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