Preparation method of monolithic polysulfone bipolar membrane with side group bonded with phthalocyanine catalytic group
A technology for synthesizing phthalocyanine catalytic groups and bipolar membranes is applied in the field of preparation of monolithic polysulfone bipolar membranes with side groups bonded to phthalocyanine catalytic groups, and can solve the chemical stability and thermal stability of functional groups. It is not high, the scope of use is limited, the utilization rate of monomer is low, etc., to achieve good economic benefits and promotion value, improve stability and service life, and save the effect of film forming process
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[0043] Example 1
[0044] (1) Take 5.0 g of bromomethylated polysulfone into a three-necked flask, dissolve it with 60 mL of N-methylpyrrolidone, and set aside. Weigh 2.39g 3,4,5-trimethoxyphenol and 0.52g NaOH, dissolve with 30mL N-methylpyrrolidone, stir for 0.5h at room temperature, add dropwise to the bromomethylated polysulfone solution, and stir at room temperature 10h, after the reaction is over, a mixed solvent precipitant with a volume ratio of water and ethanol of 1:1 is used to precipitate the product. After filtration, the precipitate is rinsed with ethanol for several times, and the precipitate is soaked in deionized water, and filtered after 24 hours to precipitate The material was vacuum dried at 70°C to prepare a methoxy-containing polysulfone polymer.
[0045]
[0046] (2) Weigh 5.0 g of methoxy-containing polysulfone polymer into a 250 mL three-necked flask, install a constant-pressure dropping funnel, and after vacuum, protect it with a nitrogen balloon. Add 12...
Example Embodiment
[0057] Example 2
[0058] (1) Synthesis of water catalyst in the middle layer of bipolar membrane-side chain bonded phthalocyanine substituent Pc-PSF polymer: In a 100mL three-necked flask, add 5.0g of bromomethylated polysulfone polymer and 60mL of NMP, to be copolymerized After the substance is fully dissolved, 20mL of NMP solution containing 6.6g of hydroxyphthalocyanine iron and 1.0g of NaHCO 3 , Put them into a three-necked flask, heat up to 50℃ under the protection of nitrogen, and react at a constant temperature for 5 hours. After the reaction is over, immediately cool the system to room temperature with an ice water bath. Use a mixture of distilled water and methanol as a precipitant to precipitate the product. The compound is washed with the mixed solution several times and dried in vacuum to obtain a polymer (Pc-PSF) with phthalocyanine (Pc) bonded to the side chain.
[0059]
[0060] (2) Take 5.0 g of bromomethylated polysulfone and add it to a three-necked flask, dissol...
Example Embodiment
[0070] Example 3
[0071] (1) Synthesis of side group-bonded phthalocyanine polysulfone polymer (Pc-PSF) bipolar membrane intermediate layer hydrolysis catalyst: in a 100mL three-necked flask, add 5.0g bromomethylated polysulfone polymer and 60mL NMP, After the copolymer is fully dissolved, 20mL of NMP solution containing 6.6g of manganese hydroxyphthalocyanine and 1.0g of NaHCO 3 , Put them into a three-necked flask, heat up to 50℃ under the protection of nitrogen, and react at a constant temperature for 5 hours. After the reaction is over, immediately cool the system to room temperature with an ice water bath. Use a mixture of distilled water and methanol as a precipitant to precipitate the product. The compound is washed with the mixed solution several times and dried in vacuum to obtain a polymer (Pc-PSF) with phthalocyanine (Pc) bonded to the side chain.
[0072]
[0073] (2) Take 5.0 g of bromomethylated polysulfone and add it to a three-necked flask, dissolve it with 60 mL o...
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