Preparation method and application of surface modified cellulose-based porous membrane
A technology of surface modification and cellulose, applied in chemical instruments and methods, fixed on/in organic carriers, peptides, etc., can solve the complex process route of cellulose membranes, limit the application of cellulose membrane materials, raw materials and Problems such as high energy consumption, to achieve the effect of environmental friendliness, non-toxicity, abundant storage, and low price
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Embodiment 1
[0028] Add dimethyl sulfoxide DMSO to dry cellulose, followed by N-methylmorpholine-N-oxide / deionized water NMMO / H 2 O mixed solvent, and add propyl gallate stabilizer and mix evenly to obtain a mixed system. In the system, the concentration of cellulose is 5wt%, the proportion of DMSO is 45wt%, the proportion of NMMO is 45wt%, and the proportion of deionized water propyl gallate is 0.5wt% of the cellulose; stir at 100°C for 2 hours, then vacuum defoam, scrape the prepared cellulose solution evenly on a glass plate to form a film and immerse in the acetone coagulation bath Replaced for 40 minutes, then fully replaced in isopropanol solution for 15 hours, and finally dried under vacuum to obtain a cellulose-based porous membrane.
[0029] The surface modification of the cellulose-based porous membrane was carried out by weighing 40 mg of sodium periodate and completely dissolving it in 40 mL of 0.1 M acetate buffer (pH 4.0), and then submerging the cellulose-based porous membra...
Embodiment 2
[0032] Add dimethyl sulfoxide DMSO to dry cellulose, followed by N-methylmorpholine-N-oxide / deionized water NMMO / H 2 O mixed solvent, and add propyl gallate stabilizer and mix evenly to obtain a mixed system. In the system, the concentration of cellulose is 6wt%, the proportion of DMSO is 44wt%, the proportion of NMMO is 46wt%, and the proportion of deionized water Propyl gallate is 0.6wt% of the cellulose; stir at 120°C for 1 hour, then vacuum defoam, scrape the prepared cellulose solution evenly on a glass plate to form a film and immerse in the acetone coagulation bath Replaced for 50 minutes, then fully replaced in isopropanol solution for 20 hours, and finally dried under vacuum to obtain a cellulose-based porous membrane.
[0033] The surface modification of the cellulose-based porous membrane was carried out by weighing 200 mg of sodium periodate and completely dissolving it in 40 mL of 0.1 M acetate buffer (pH 4.0), and then submerging the cellulose-based porous membra...
Embodiment 3
[0035] Add dimethyl sulfoxide DMSO to dry cellulose, followed by N-methylmorpholine-N-oxide / deionized water NMMO / H 2 O mixed solvent, and add propyl gallate stabilizer and mix evenly to obtain a mixed system. In the system, the concentration of cellulose is 4wt%, the proportion of DMSO is 50wt%, the proportion of NMMO is 40wt%, and the proportion of deionized water propyl gallate is 0.6wt% of the cellulose; stir at 80°C for 5h, then vacuum defoam, scrape the prepared cellulose solution evenly on a glass plate to form a film and immerse in the acetone coagulation bath Replaced for 40 minutes, then fully replaced in isopropanol solution for 12 hours, and finally dried under vacuum to obtain a cellulose-based porous membrane.
[0036] The surface modification of the cellulose-based porous membrane was carried out by weighing 200 mg of sodium periodate and completely dissolving it in 40 mL of 0.1 M acetate buffer (pH 4.0), and then submerging the cellulose-based porous membrane in...
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