Ion exchange membrane, method for producing ion exchange membrane, and electrolytic cell
An ion exchange membrane and manufacturing method technology, applied in the electrolysis process, electrolysis components, diaphragms, etc., can solve the problems of increasing electrolysis voltage, decreasing current efficiency, increasing alkali impurity concentration, etc., and achieve the effect of stable electrolysis performance and small impact.
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Embodiment 1
[0187] As the reinforcing thread, a polytetrafluoroethylene (PTFE) 100-denier flat yarn twisted 900 times / m (hereinafter referred to as PTFE thread) was used. As the sacrificial yarn for the warp, a yarn obtained by twisting 35 denier, 8-filament polyethylene terephthalate (PET) at 200 twists / m (hereinafter referred to as PET yarn) was used. In addition, as the sacrificial yarn of the weft, a yarn obtained by twisting 35 denier, 8-filament polyethylene terephthalate (PET) at 200 times / m (called PET yarn in the fiber) was used. . First, plain weaving was performed with 24 PTFE threads / inch and two sacrificial threads arranged between adjacent PTFE threads to obtain a woven fabric with a thickness of 100 μm.
[0188] Next, prepare as a CF 2 = CF 2 with CF 2 = CFOCF 2 CF(CF 3 )OCF 2 CF 2 COOCH 3 The ion exchange capacity of the copolymer is 0.85 mg equivalent / g of polymer (A1) of dry resin, as CF 2 = CF 2 with CF 2 = CFOCF 2 CF(CF 3 )OCF 2 CF 2 SO 2The ion exchan...
Embodiment 2
[0196] In Example 1, except reducing the usage-amount of HS-210 and changing viscosity to 12.0 mPa*s, it carried out similarly to Example 1, and produced the ion exchange membrane. In this ion exchange membrane, the content of the fluorine-containing polymer in the binder was 100% by mass.
[0197] The distribution density was measured in the same manner as in Example 1, and the result was that every 1 cm 2 0.5mg in. In addition, when the coverage rate was measured in the same manner as in Example 1, it was 56.5%.
[0198] [Electrolysis Evaluation]
[0199] Using this ion-exchange membrane, the electrolytic performance was evaluated under the same conditions as in Example 1. As a result, the voltage showed a low value of 3.08V, and the measurement of impurity tolerance was performed. As a result, the decrease in current efficiency was as small as 0.74% / day, showing High impurity durability.
Embodiment 3
[0201] In Example 1, an ion exchange membrane was produced in the same manner as in Example 1 except that the usage-amount of HS-210 was increased and the viscosity was changed to 8.5 mPa·s. In this ion exchange membrane, the content of the fluorine-containing polymer in the binder was 100% by mass.
[0202] The distribution density was measured in the same manner as in Example 1, and the result was that every 1 cm 2 0.5mg in. In addition, when the coverage rate was measured in the same manner as in Example 1, it was 92.9%.
[0203] [Electrolysis Evaluation]
[0204] Using this ion exchange membrane, the electrolytic performance was evaluated under the same conditions as in Example 1. As a result, the voltage showed a low value of 3.06V, and the measurement of impurity tolerance was performed. As a result, the decrease in current efficiency was as small as 0.42% / day, showing High impurity durability.
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