Preparation method of essential oil slow-release preservative film
A technology of plastic wrap and essential oil, applied in flexible covering, packaging, wrapping paper, etc., can solve the problem of poor volatility effect of plant essential oil, and achieve the effect of being strong and not easy to break, complete coating, and slowing down the volatilization speed.
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Embodiment 1
[0021] 1) Add 5 g of plant essential oil, 0.5 g of cross-linking agent glutaraldehyde, and 0.1 g of emulsifier glyceryl acetyl tartaric acid fatty acid ester into 60 mL of deionized water, and stir for 50 min at a speed of 2000 r / min to form a stable oil-in-water emulsion. Pour into 100g of saturated gelatin solution, heat at 80°C for 2h, wash with ethanol and deionized water once, and dry at room temperature to obtain single-coated microcapsules;
[0022] 2) Add 10 g of single-coated microcapsules, 20 g of mesoporous molecular sieves, and 0.1 g of emulsifier polyglycerol ester into 60 mL of deionized water, stir for 50 min at a speed of 2500 r / min to form a stable oil-in-water emulsion, and pour it into In 100g of gelatin saturated solution, heated at 70°C for 3h, washed once with ethanol and deionized water, and dried at room temperature to obtain double-layer sandwich microcapsules;
[0023] 3) Add 100 g of collagen, 20 g of double-layer sandwich microcapsules, and 0.5 g of...
Embodiment 2
[0025] 1) Add 30g of plant essential oil, 3g of cross-linking agent phosphorus oxychloride and 0.5g of emulsifier sucrose fatty acid ester into 200mL of deionized water, stir at a speed of 5000r / min for 30min to form a stable oil-in-water emulsion, pour it into 100g of saturated gelatin solution, heated at 70°C for 3h, washed with ethanol and deionized water once, and dried at room temperature to obtain single-coated microcapsules;
[0026] 2) Add 20 g of single-coated microcapsules, 40 g of mesoporous molecular sieves, and 0.5 g of emulsifier sucrose fatty acid ester into 200 mL of deionized water, stir at a speed of 3000 r / min for 40 min to form a stable oil-in-water emulsion, and pour it into In 100g of gelatin saturated solution, heat at 90°C for 1h, wash with ethanol and deionized water once, and dry at room temperature to obtain double-layer sandwich microcapsules;
[0027] 3) Add 100g of collagen, 40g of double-layer sandwich microcapsules, and 2g of plasticizer citrate...
Embodiment 3
[0029] 1) Add 20g of plant essential oil, 2g of cross-linking agent sodium trimetaphosphate and 0.3g of emulsifier saponin into 100mL of deionized water, stir at 3000r / min for 30min to form a stable oil-in-water emulsion, pour it into 100g In saturated gelatin solution, heat at 90°C for 1 hour, wash with ethanol and deionized water once, and dry at room temperature to obtain single-coated microcapsules;
[0030] 2) Add 15 g of single-coated microcapsules, 30 g of mesoporous molecular sieves, and 0.3 g of emulsifier saponin into 100 mL of deionized water, stir for 30 min at a speed of 5000 r / min to form a stable oil-in-water emulsion, and pour it into In 100g of saturated gelatin solution, heat at 80°C for 2h, wash with ethanol and deionized water once, and dry at room temperature to obtain double-layer sandwich microcapsules;
[0031] 3) Add 100 g of collagen, 30 g of double-layer sandwich microcapsules, and 1 g of plasticizer methyl phthalate into 200 mL of deionized water, h...
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