a mesoporous sio 2 Stable pickering emulsion and preparation method thereof
A mesoporous, emulsion technology, applied in chemical instruments and methods, chemical/physical processes, silicon oxide, etc., can solve problems such as Pickering emulsions that have not yet been seen, and achieve the effect of expanding the scope of application
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[0027] The mesoporous SiO 2 The preparation method of stable Pickering emulsion, it comprises the following processing steps:
[0028] (1) Mesoporous SiO 2 Preparation: Using cetyltrimethylammonium chloride as a template and tetraethylorthosilicate as a silicon source, the mesoporous SiO was prepared in an alkaline medium. 2 ;
[0029] (2) Preparation of Pickering emulsion: dissolve the surfactant in water to form an aqueous surfactant solution, and then add mesoporous SiO to the aqueous surfactant solution 2 , ultrasonically disperse, then add the oil phase material and mix homogeneously to obtain the Pickering emulsion;
[0030] Wherein, the concentration of the aqueous surfactant solution is 0.6-3mmol / L; the volume ratio of the aqueous surfactant solution to the oil phase substance is 1:1; the mesoporous SiO 2 The weight is 0.1%-2% of the surfactant aqueous solution weight.
[0031] The specific operation method of step (1) is:
[0032] a. Dissolve the cetyltrimethyla...
Embodiment 1
[0039] Example 1: Mesoporous SiO 2 preparation of
[0040] a. Take a certain amount of CTAC (2.35g, 0.007mol) in an eggplant-shaped flask, dissolve it in deionized water (90.5g, 5.028mol), heat and stir until the solution is clear, and obtain hexadecyl trimethyl chloride Aqueous solution of ammonium chloride;
[0041] b. Weigh a certain amount of TEOS (8.5g, 0.040mol) and TEA (61.2g, 0.410mol), heat and mix at 95°C for 25min to obtain the initial mixture;
[0042] c. Add the initial mixed solution obtained in step b into the cetyltrimethylammonium chloride aqueous solution obtained in step a to obtain the final mixed solution; wherein, in the final mixed solution, tetraethyl orthosilicate, cetyl The molar ratio of trimethylammonium chloride, triethylamine and deionized water is 1:0.178:8:120; after that, the final mixed solution was stirred and reacted at room temperature for 3 hours to obtain a turbid solution, namely the crude product;
[0043] d. Wash the crude product o...
Embodiment 2
[0046] Example 2: Mesoporous SiO 2 preparation of
[0047] a. Take a certain amount of CTAC (2.18g, 0.0068mol) in an eggplant-shaped flask, dissolve it in deionized water (79.2g, 4.4mol), heat and stir until the solution is clear, and obtain hexadecyl trimethyl chloride Aqueous solution of ammonium chloride;
[0048] b. Weigh a certain amount of TEOS (8.3g, 0.040mol) and TEA (47.2g, 0.316mol), heat and mix at 90°C for 30min to obtain the initial mixture;
[0049] c. Add the initial mixed solution obtained in step b into the cetyltrimethylammonium chloride aqueous solution obtained in step a to obtain the final mixed solution; wherein, in the final mixed solution, tetraethyl orthosilicate, cetyl The molar ratio of trimethylammonium chloride, triethylamine and deionized water is 1:0.170:7.9:110;
[0050] Afterwards, the final mixed solution was stirred and reacted at room temperature for 5 hours to obtain a turbid solution, namely the crude product;
[0051] d. Wash the crud...
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