Preparation method of hydrophobic shell gel microcapsule with controllable shell thickness
A kind of microcapsule and gel technology, applied in the field of preparation of hydrophobic shell gel microcapsules
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[0023] see Figure 1-Figure 4 , the present invention provides a technical solution: a method for preparing a hydrophobic shell gel microcapsule with controllable shell thickness, the hydrophobic shell gel microcapsule is prepared by the method comprising the following steps: mixing 2% (W / W) Lecithin and medium-chain triglycerides (MCT) were mixed in advance as the oil phase, 3% (W / W) sodium alginate (ALG) was the water phase, and the water-in-oil emulsion prepared by emulsifying at 400rpm for 30min was passed through Ca 2+ The ion-solidified water phase becomes gel particles, and then the water-in-oil emulsion is added to the wheat prolamin solution (mass concentration is 0.5-4.0%W / W) dissolved in the urea solution of 12.5mol / L, based on the The difference in osmotic pressure between the gel particles and the wheat prolamin solution causes the wheat prolamin dissolved in urea to precipitate and wrap on the surface of the gel particles, finally forming gel microcapsules with a...
Embodiment 1
[0034] Preparation of a hydrophobic shell gel microcapsule with a shell thickness of 8.5 μm.
[0035] This embodiment is suitable for sodium alginate samples of various molecular weights capable of forming gels.
[0036] 1) Preparation of hydrophilic nucleosomes: 2% (W / W) of lecithin and medium-chain triglyceride (MCT) were mixed in advance as the oil phase, and 3% (W / W) of sodium alginate (ALG) was Water phase, emulsified at 400rpm for 30min to prepare water-in-oil emulsion. Afterwards, 10 g of MCT containing 0.45 mol / L glacial acetic acid was dropped into the prepared water-in-oil emulsion in the emulsion, and stirred continuously for 15 minutes at 89 rpm. At this time, acetic acid released CaCO 3 Ca 2+ Allow the alginate gel to solidify.
[0037] 2) Preparation of hydrophilic-hydrophobic core-shell microcapsules: adding the water-in-oil emulsion to the wheat prolamin solution (mass concentration: 1% W / W) dissolved in 12.5 mol / L urea solution, Based on the difference in ...
Embodiment 2
[0040] Preparation of a hydrophobic shell gel microcapsule with a shell thickness of 15.3 μm.
[0041] This embodiment is suitable for sodium alginate samples of various molecular weights capable of forming gels.
[0042]1) Preparation of hydrophilic nucleosomes: 2% (W / W) of lecithin and medium-chain triglyceride (MCT) were mixed in advance as the oil phase, and 3% (W / W) of sodium alginate (ALG) was Water phase, emulsified at 400rpm for 30min to prepare water-in-oil emulsion. Afterwards, 10 g of MCT containing 0.45 mol / L glacial acetic acid was dropped into the prepared water-in-oil emulsion in the emulsion, and stirred continuously for 15 minutes at 89 rpm. At this time, acetic acid released CaCO 3 Ca 2+ Allow the alginate gel to solidify.
[0043] 2) Preparation of hydrophilic-hydrophobic core-shell microcapsules: adding the water-in-oil emulsion to the wheat prolamin solution (mass concentration: 2% W / W) dissolved in 12.5 mol / L urea solution, Based on the difference in ...
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