Bipolar membrane with aluminum hydroxide as intermittent interface layer catalyst and preparation method of bipolar membrane
A technology of aluminum hydroxide and interfacial layer, applied in physical/chemical process catalysts, chemical instruments and methods, electrodes, etc., can solve the problems of reduced water dissociation efficiency of bipolar membranes, difficulty in forming bipolar membranes, poor interface compatibility, etc. , to achieve the effect of short preparation cycle, slow down the loss and stable performance
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Embodiment 1
[0020] To prepare a bipolar membrane using aluminum hydroxide as a catalyst for the intermediate interface layer, the specific steps are as follows:
[0021] 1. The preparation of the middle layer membrane solution:
[0022] Weigh 0.2g (about 2.56mmol) nano aluminum hydroxide powder (average particle size: 30nm) with an electronic balance and place it in a 50mL clean beaker, add 10mL absolute ethanol (ω=99.5%), and use an ultrasonic device (300W) The obtained mixture was dispersed to obtain an aluminum hydroxide dispersion liquid, that is, an interlayer film liquid. The dispersion time was 10 minutes, and the temperature was controlled at 60° C. with a constant temperature water bath.
[0023] 2. Preparation of bipolar membrane:
[0024] (1) Cut the sulfonated polyether ether ketone (SPEEK) cation exchange membrane into a square of 5 cm × 5 cm, and soak it in distilled water for 24 hours to remove impurities on the surface of the membrane.
[0025] (2) After the basement mem...
Embodiment 2
[0032] To prepare a bipolar membrane using aluminum hydroxide as a catalyst for the intermediate interface layer, the specific steps are as follows:
[0033] 1. The preparation of the middle layer membrane solution:
[0034] Al(OH) 3 The preparation process of the dispersion and the molar ratio of the raw materials are the same as those in Example 1, and will not be repeated here.
[0035] 2. Preparation of bipolar membrane:
[0036] (1) Cut the sulfonated polyether ether ketone (SPEEK) cation exchange membrane into a square of 5 cm × 5 cm, and soak it in distilled water for 24 hours to remove impurities on the surface of the membrane.
[0037] (2) After the basement membrane is fully infiltrated, soak it in 1mol / L HCl aqueous solution for 6 hours to adjust the exchangeable ion type on the ion exchange group in the membrane, and then wash the acid solution adhered to the membrane surface with distilled water; Then transfer the cation exchange membrane to 1mol / L NaOH aqueous...
Embodiment 3
[0044] To prepare a bipolar membrane using aluminum hydroxide as a catalyst for the intermediate interface layer, the specific steps are as follows:
[0045] 1. The preparation of the middle layer membrane solution:
[0046] Al(OH) 3 The preparation process of the dispersion and the molar ratio of the raw materials are the same as those in Example 1, and will not be repeated here.
[0047] 2. Preparation of bipolar membrane:
[0048] (1) Cut the sulfonated polyether ether ketone (SPEEK) cation exchange membrane into a square of 5 cm × 5 cm, and soak it in distilled water for 24 hours to remove impurities on the surface of the membrane.
[0049] (2) After the basement membrane is fully infiltrated, soak it in 1mol / L HCl aqueous solution for 6 hours to adjust the exchangeable ion type on the ion exchange group in the membrane, and then wash the acid solution adhered to the membrane surface with distilled water; Then transfer the cation exchange membrane to 1mol / L NaOH aqueous...
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