A kind of titanium dioxide antibacterial sol and preparation method thereof
A technology of titanium dioxide and sol, applied in the field of antibacterial, can solve the problems of unfavorable crystallization of colloidal molecules, high cost of silver, unfavorable actual production, etc.
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[0024] The preparation method of described titanium dioxide antibacterial sol, comprises the steps:
[0025] S100 Add corresponding mass parts of titanium alkoxide into the solvent and stir for 0.5-3 hours, wherein the stirring temperature is 40-50°C and the stirring speed is 300-500r / min;
[0026] S200 Add water and functional catalyst, stir for 0.5-1h; and
[0027] Add the mixed solution of chitosan, stabilizer and binder to S300 and stir for 1-6 hours, wherein the stirring temperature is 60-80° C. and the stirring speed is 500-1000 r / min to form a sol solution.
[0028] Wherein, in step S200, the preparation method of functional catalyst comprises the following steps:
[0029] S210 Mix 1,3-propane sultone and ethyl acetate to prepare a solution with a mass fraction of 30-50%, add equimolar amount of 1-imidazole acetic acid, stir at 450-750r / min, heat up React at 50-80°C for 6-18 hours, centrifuge and wash to obtain the intermediate; and
[0030] S220 Mix the intermediate...
Embodiment 1
[0035] K-25, K-30 and K-40 were purchased from Nanjing Ruize Fine Chemical Co., Ltd., and PEG-400, PEG-600 and PEG-800 were purchased from Wenzhou Qingming Chemical Co., Ltd.
[0036] The preparation method of functional catalyst comprises steps:
[0037] (1) After mixing 1,3-propane sultone and ethyl acetate to prepare a solution with a mass fraction of 40%, add equimolar 1-imidazole acetic acid, stir and heat at 450r / min and heat up to 50°C React for 6h, centrifuge and wash to obtain the intermediate;
[0038] (2) After mixing the intermediate with water to prepare an aqueous solution with a mass fraction of 40%, add equimolar 38% tetrafluoroboric acid, stir and heat up to 60°C under the condition of 300r / min, react for 12h, and centrifuge and wash to obtain functional catalyst.
[0039] The preparation method of described titanium dioxide antibacterial sol, comprises the steps:
[0040] Add 100 parts of tetraethyl titanate to 50 parts of propanol, stir for 3 hours at a t...
Embodiment 2
[0042] The preparation method of functional catalyst comprises steps:
[0043] (1) After mixing 1,3-propane sultone and ethyl acetate to prepare a solution with a mass fraction of 50%, add equimolar 1-imidazole acetic acid, stir and heat up to 80°C under the condition of 450r / min React for 6h, centrifuge and wash to obtain the intermediate;
[0044] (2) After mixing the intermediate with water to prepare an aqueous solution with a mass fraction of 60%, add equimolar 38% tetrafluoroboric acid, stir and heat to 90°C under the condition of 500r / min, react for 2h, and centrifuge to obtain Function Catalyst, spare.
[0045] The preparation method of described titanium dioxide antibacterial sol, comprises the steps:
[0046] Add 50 parts of n-propyl titanate into 60 parts of butanol, stir for 0.5h at a temperature of 50°C and a stirring speed of 500r / min; then add 3 parts of distilled water and 10 parts of a functional catalyst, stir for 1h, and then add chitosan A mixed solution o...
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