Post-treatment method for improving stability of reverse osmosis membrane and reverse osmosis membrane product
A reverse osmosis membrane and stability technology, applied in the direction of osmosis/dialysis water/sewage treatment, reverse osmosis, semi-permeable membrane separation, etc., can solve the problems of decreased desalination rate, unqualified performance, high molecular viscosity, etc.
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Embodiment 1
[0111] 1. PVA solution formula:
[0112] 3.0 parts of PVA particles;
[0113] 0.5 parts of sodium dodecylsulfonate;
[0114] 3.0 parts of simethicone oil;
[0115] 93.5 parts of RO water.
[0116] The PVA particles, surfactants, additives and water are stirred and heated to dissolve at 80° C. and 1200 rpm stirring speed to obtain a uniform and transparent PVA solution. Cool to 25°C and set aside.
[0117] 2. Post-processing process:
[0118] S1. Rinse the nascent reverse osmosis membrane through a rinsing tank. The rinsing solution is RO water at a temperature of 50° C. for 5 minutes.
[0119] S2. At an ambient humidity of 80% RH, pour the PVA solution on the surface of the reverse osmosis membrane, and use a roller to remove excess solution on the surface.
[0120] S3. Place in an oven and dry at 60° C. for 2 minutes to obtain a reverse osmosis membrane product with a smooth and uniform surface.
Embodiment 2
[0122] 1. PVA solution formula:
[0123] 3.0 parts of PVA particles;
[0124] 0.5 parts of sodium dodecylsulfonate;
[0125] 5.0 parts of polyacrylic acid;
[0126] 91.5 parts of RO water.
[0127] The PVA particles, surfactants, additives and water are stirred and heated to dissolve at 80° C. and 1200 rpm stirring speed to obtain a uniform and transparent PVA solution. Cool to 25°C and set aside.
[0128] 2, post-treatment process: with embodiment 1.
Embodiment 3
[0130] 1. PVA solution formula:
[0131] 3.0 parts of PVA particles;
[0132] 0.5 parts of sodium dodecylsulfonate;
[0133] 2.0 parts of sodium carboxymethylcellulose;
[0134] 94.5 parts of RO water.
[0135] The PVA particles, surfactants, additives and water are stirred and heated to dissolve at 80° C. and 1200 rpm stirring speed to obtain a uniform and transparent PVA solution. Cool to 25°C and set aside.
[0136] 2, post-treatment process: with embodiment 1.
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