Hydrophilic polyamide reverse osmosis membrane with compact surface as well as preparation method and application thereof
A technology of reverse osmosis membrane and polyamide, used in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as membrane water flux decline
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Embodiment 1
[0039] A method for intercepting boric acid in nuclear power plant liquid effluents, comprising the steps of: placing a reverse osmosis membrane (polyamide commercial reverse osmosis membrane LE) in 25% isopropanol solution to soak for 20 minutes, and then cleaning with deionized water 6 times, 30 minutes each time, store in deionized water at 4°C; then place the reverse osmosis membrane in the modification pool, cover with carbodiimide solution for 10 minutes, then add N-hydroxysuccinimide solution , poured out the waste liquid after covering for 50 minutes, and cleaned the reverse osmosis membrane with deionized water for 2 times; then the concentration of the reverse osmosis membrane was 5%, and the proportion of branched polyethyleneimine (branching degree was 60%) was 100%. The solution was covered for 12 hours, and light-shielding treatment was carried out during the process. Afterwards, the waste liquid was poured out, and the membrane was washed twice with deionized wat...
Embodiment 2
[0043] A method for intercepting boric acid in nuclear power plant liquid effluents, comprising the steps of: placing a reverse osmosis membrane (polyamide commercial reverse osmosis membrane LE) in 25% isopropanol solution to soak for 20 minutes, and then cleaning with deionized water 6 times, 30 minutes each time, store in deionized water at 4°C; then place the reverse osmosis membrane in the modification pool, cover with carbodiimide solution for 10 minutes, then add N-hydroxysuccinimide solution , poured out the waste liquid after covering for 50 minutes, and cleaned the reverse osmosis membrane 2 times with deionized water; then the concentration of the reverse osmosis membrane was 5%, and the proportion of branched polyethyleneimine (branching degree was 60%) was 70%. The solution was covered for 12 hours, and light-shielding treatment was carried out during the process. Afterwards, the waste liquid was poured out, and the membrane was washed twice with deionized water to...
Embodiment 3
[0047] A method for intercepting boric acid in nuclear power plant liquid effluents, comprising the steps of: placing a reverse osmosis membrane (polyamide commercial reverse osmosis membrane LE) in 25% isopropanol solution to soak for 20 minutes, and then cleaning with deionized water 6 times, 30 minutes each time, store in deionized water at 4°C; then place the reverse osmosis membrane in the modification pool, cover with carbodiimide solution for 10 minutes, then add N-hydroxysuccinimide solution , poured out the waste liquid after covering for 50 minutes, and cleaned the reverse osmosis membrane 2 times with deionized water; then the concentration of the reverse osmosis membrane was 5%, and the proportion of branched polyethyleneimine (branching degree was 60%) was 50%. The solution was covered for 12 hours, and light-shielding treatment was carried out during the process. Afterwards, the waste liquid was poured out, and the membrane was washed twice with deionized water to...
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