A kind of mesoporous silica and cellulose blend film protected by buffer solution and its preparation method and application
A technology of mesoporous silica and buffer solution, applied in chemical instruments and methods, bandages, water/sludge/sewage treatment, etc., can solve problems such as structural damage, achieve high adsorption performance, high tensile strength, accelerate The effect of epithelial cell growth
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Embodiment 1
[0027] A method for preparing a mesoporous silica and cellulose blend membrane protected by a buffer solution, the specific steps are as follows:
[0028] 1) Configure 0.5mol / L phosphate buffer solution (pH=6.0);
[0029] 2) Disperse the SBA-15 particles in the buffer solution prepared in step 1), soak for 48 hours to obtain a SBA-15 mesoporous silica / phosphate buffer solution dispersion with a mass fraction of 15%, and refrigerate to -5°C until use;
[0030] 3) Prepare cellulose solvent, pre-cool to -12°C, then add cellulose, stir to dissolve, defoam and remove impurities, and finally obtain a cellulose solution with a mass fraction of 4%;
[0031] 4) Add the pre-cooled mesoporous silica / buffer solution dispersion prepared in step 2) into the cellulose solution pre-cooled to -10°C, and stir mechanically for 2 minutes to obtain a SBA-15 particle mass fraction of 2%. Casting solution;
[0032] 5) Pour the casting liquid prepared in step 4) into the film-making template, use ...
Embodiment 2
[0036] A method for preparing a mesoporous silica and cellulose blend membrane protected by a buffer solution, the specific steps are as follows:
[0037] 1) Configure 0.2mol / L phosphate buffer solution (pH=6.0);
[0038]2) Disperse the SBA-15 particles in the buffer solution prepared in step 1), soak for 24 hours to obtain a SBA-15 mesoporous silica / phosphate buffer solution dispersion with a mass fraction of 10%, and refrigerate to -3°C until use;
[0039] 3) Prepare cellulose solvent, pre-cool to -12°C, then add cellulose, stir to dissolve, defoam and remove impurities, and finally obtain a cellulose solution with a mass fraction of 3.5%;
[0040] 4) Add the pre-cooled mesoporous silica / buffer solution dispersion prepared in step 2) into the cellulose solution pre-cooled to -10°C, and stir mechanically for 1 minute to obtain a SBA-15 particle mass fraction of 1%. Casting solution;
[0041] 5) Pour the casting liquid prepared in step 4) into the film-making template, use ...
Embodiment 3
[0045] A method for preparing a mesoporous silica and cellulose blend membrane protected by a buffer solution, the specific steps are as follows:
[0046] 1) Prepare 0.1mol / L citric acid-sodium citrate buffer solution (pH=6.4);
[0047] 2) Disperse the MCM-41 particles in the buffer solution prepared in step 1), soak for 72 hours to obtain the MCM-41 mesoporous silica / citric acid-sodium citrate buffer solution dispersion with a mass fraction of 5%, and refrigerate until -3°C for use;
[0048] 3) Prepare cellulose solvent, pre-cool to -12°C, then add cellulose, stir to dissolve, defoam and remove impurities, and finally obtain a cellulose solution with a mass fraction of 4%;
[0049] 4) Add the pre-cooled mesoporous silica / buffer solution dispersion prepared in step 2) into the cellulose solution pre-cooled to -10°C, and stir mechanically for 3 minutes to obtain MCM-41 particles with a mass fraction of 0.5%. Casting solution;
[0050] 5) Pour the casting solution prepared in...
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