Stable photo-responsive Pickering emulsion with photosensitive POSS hybrid particles as emulsifying agent and preparation method
A technology of hybrid particles and photoresponsiveness, which is applied in the direction of medical preparations, cosmetic preparations, and cosmetics with non-active ingredients, can solve the problem of few light-sensitive emulsions, and achieve good promotion and application value and operability Strong, easy-to-use effect
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example 1
[0026] (1) Preparation of photosensitive POSS hybrid particles
[0027] Dissolve octachloropropyl POSS in N,N-dimethylformamide, stir until completely dissolved, the mass ratio of octachloropropyl POSS to N,N-dimethylformamide is 1:80, add azobenzene monomer, the amount of azobenzene monomer added is 1.2 times that of octachloropropyl POSS, then add catalyst cuprous bromide / tris(2-methylaminoethyl)amine, and the system reacts under the protection of hydrogen or nitrogen, The reaction temperature is 70°C, the reaction time is 16 hours, the product is dissolved in chloroform, after the catalyst is removed, the chloroform is removed by rotary evaporation, and then precipitated by n-hexane, and the precipitate is filtered and dried to constant weight to obtain azobenzene-containing group of POSS hybrid particles.
[0028] (2) Preparation of a stable W / O Pickering emulsion with photoresponsiveness
[0029] Take a certain amount of hydrophobic photosensitive POSS hybrid particles,...
example 2
[0031] (1) Preparation of photosensitive POSS hybrid particles
[0032] Dissolve octachloropropyl POSS in toluene, stir until completely dissolved, the mass ratio of octachloropropyl POSS to toluene is 1:120, add azobenzene monomer, the amount of azobenzene monomer added is octachloropropane 1.5 times that of the base POSS, then add the catalyst cuprous chloride / pentamethyldiethylenetriamine, the system reacts under the protection of hydrogen or nitrogen, the reaction temperature is 80 ° C, the reaction time is 18 hours, the product is dissolved in tetrahydrofuran, After the catalyst is removed, tetrahydrofuran is removed by rotary evaporation, and then precipitated by anhydrous methanol, and the precipitate is filtered and dried to a constant weight to obtain POSS hybrid particles containing azophenyl groups.
[0033] (2) Preparation of a stable W / O Pickering emulsion with photoresponsiveness
[0034] Take a certain amount of hydrophobic photosensitive POSS hybrid particles,...
example 3
[0036] (1) Preparation of photosensitive POSS hybrid particles
[0037] Dissolve octachloropropyl POSS in N,N-dimethylformamide, stir until completely dissolved, the mass ratio of octachloropropyl POSS to toluene is 1:100, add azobenzene monomer, the added azobenzene The amount of monomer is twice that of octachloropropyl POSS, then add catalyst cuprous chloride / pentamethyldiethylenetriamine, the system reacts under the protection of hydrogen or nitrogen, the reaction temperature is 90°C, and the reaction time is 20 hours , the product was dissolved in dichloromethane, after the catalyst was removed, the dichloromethane was removed by rotary evaporation, and then precipitated by cyclohexane, and the precipitate was filtered and dried to constant weight to obtain the POSS hybrid particles.
[0038] (2) Preparation of a stable W / O Pickering emulsion with photoresponsiveness
[0039]Take a certain amount of hydrophobic photosensitive POSS hybrid particles, add them to toluene, ...
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