Modified silicon dioxide, membrane casting solution, fibrous membrane and preparation method and application of fibrous membrane
A technology of silicon dioxide and casting solution, which is applied in the direction of spinning solution preparation, fiber treatment, fiber chemical characteristics, etc., to achieve the effects of industrial production, improvement of film-forming performance, and good hydrophilicity
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Embodiment 1
[0067] (1) Disperse 40nm hydrophilic silicon dioxide powder in deionized water, the concentration of silicon dioxide is 4mg / mL, sonicate for 30min to form a uniform silicon dioxide suspension, and obtain a solution containing silicon dioxide;
[0068] (2) Mix 1mL of KH560 with 5mL of deionized water, stir for 30min, mix with 5mL of absolute ethanol, and then slowly add it dropwise into the obtained solution containing silica to control the coupling of silica and silane The weight ratio of the agent is 1:20, followed by vacuum drying for 24h to obtain modified silica;
[0069] (3) Add the modified silicon dioxide into tetrahydrofuran, the concentration of silicon dioxide is 5 mg / mL, and ultrasonically treat it to disperse it evenly to form a dispersion of silicon dioxide modified by a silane coupling agent; then disperse the above silicon dioxide solution was mixed with methyl methacrylate and methacryloyl ethyl sulfobetaine, and after ultrasonic treatment and dispersion, a con...
Embodiment 2
[0074] (1) Disperse 60nm hydrophilic silicon dioxide powder in deionized water, the concentration of silicon dioxide is 5mg / mL, ultrasonic 20min, form a uniform silicon dioxide suspension, and obtain a solution containing silicon dioxide;
[0075] (2) Mix 1mL of KH560 with 4mL of deionized water, stir for 30min, mix well with 4mL of absolute ethanol, and then slowly add it dropwise into the obtained solution containing silica to control the concentration of silica and silane coupling agent The weight ratio is 1:30, followed by vacuum drying for 18h to obtain modified silica;
[0076] (3) Add the modified silicon dioxide into tetrahydrofuran, the concentration of silicon dioxide is 2 mg / mL, and ultrasonically treat it to make it uniformly dispersed to form a dispersion of silicon dioxide modified by a silane coupling agent; then disperse the above silicon dioxide solution mixed with methyl methacrylate and methacrylic acid, after ultrasonic treatment and dispersion, a concentra...
Embodiment 3
[0080] (1) Disperse 40nm hydrophilic silicon dioxide powder in deionized water, the concentration of silicon dioxide is 10mg / mL, ultrasonic 20min, form a uniform silicon dioxide suspension, and obtain a solution containing silicon dioxide;
[0081] (2) Mix 1mL of KH560 with 5mL of deionized water, stir for 30min and mix with 10mL of absolute ethanol evenly, then slowly add dropwise to the obtained solution containing silica to control the concentration of silica and silane coupling agent The weight ratio is 1:25, followed by vacuum drying for 24h to obtain modified silica;
[0082] (3) Add the modified silicon dioxide into tetrahydrofuran, the concentration of silicon dioxide is 10 mg / mL, and ultrasonically treat it to make it uniformly dispersed to form a dispersion of silicon dioxide modified by a silane coupling agent; then disperse the above silicon dioxide solution mixed with methyl methacrylate and oligoethylene glycol methyl ether methacrylate, after ultrasonic treatmen...
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