A kind of essence microcapsule with sustained-release effect and preparation method thereof
An essence microcapsule and slow-release technology, applied in the field of daily chemical industry, can solve the problems of sensitivity, the aroma retention period cannot be guaranteed, the essence is easy to volatilize, etc., and achieves the effects of increasing solubility, slowing down rapid volatilization loss and low cost.
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Embodiment 1
[0029] (1) Preparation of β-cyclodextrin / paraffin inclusion compound suspension
[0030] Accurately weigh 4.5g of β-cyclodextrin and 0.5g of paraffin into a round-bottomed flask, slowly add 90g of deionized water, stir at 40°C at 600rpm for 0.5h to completely clathrate β-cyclodextrin and paraffin, and cool Obtain β-cyclodextrin / paraffin inclusion compound suspension.
[0031] (2) Preparation of mixed oil phase
[0032] Accurately weigh 9 g of n-octadecane, 3 g of orange oil essence, 10 g of methyl methacrylate, and 0.11 g of azobisisobutyrocyanide into a round bottom flask, and stir at 35° C. at 250 rpm for 0.5 h to obtain a mixed oil phase.
[0033] (3) Preparation of Pickering emulsion
[0034] Add the suspension in step (1) dropwise to the mixed oil phase in step (2), and stir at 800rpm at 40°C for 1 hour to make the mixed oil phase react under the action of β-cyclodextrin / paraffin clathrate The Pickering emulsion is obtained by uniformly dispersing in water in the form ...
Embodiment 2
[0040] (1) Preparation of γ-cyclodextrin / beeswax clathrate suspension
[0041]Accurately weigh 4g of γ-cyclodextrin and 0.8g of beeswax into a round-bottom flask, slowly add 60g of deionized water, stir at 80°C and 800rpm for 1 hour, make the inclusion of γ-cyclodextrin and beeswax complete, and cool to obtain γ-cyclodextrin - Cyclodextrin / beeswax clathrate suspension.
[0042] (2) Preparation of mixed oil phase
[0043] Accurately weigh 10g of white oil, 1g of lily essence, 18g of butyl methacrylate, 2g of trimethylolpropane triacrylate, and 0.2g of benzoyl peroxide in a round bottom flask, and stir at 20°C at 600rpm for 0.25h, A mixed oily phase was obtained.
[0044] (3) Preparation of Pickering emulsion
[0045] Add the suspension in step (1) dropwise to the mixed oil phase in step (2), stir at 20°C at 1000rpm for 0.5h, make the mixed oil phase in the γ-cyclodextrin / beeswax clathrate Under the action, it is uniformly dispersed in water in the form of small droplets to ...
Embodiment 3
[0051] (1) Preparation of α-cyclodextrin / palm wax clathrate suspension
[0052] Accurately weigh 4.8g of α-cyclodextrin and 0.8g of palm wax into a round bottom flask, slowly add 85g of deionized water, and stir at 900rpm at 65°C for 1.25h to completely clathrate α-cyclodextrin and palm wax. Cool to obtain α-cyclodextrin / palm wax clathrate suspension.
[0053] (2) Preparation of mixed oil phase
[0054] Accurately weigh 20g of sunflower oil, 4g of rose essence, 6g of methyl acrylate, 4g of lauryl methacrylate, and 0.1g of benzoyl peroxide in a round bottom flask, and stir at 50°C at 400rpm for 0.16h to obtain a mixed oil Mutually.
[0055] (3) Preparation of Pickering emulsion
[0056] Add the suspension in step (1) dropwise to the mixed oil phase in step (2), stir at 50°C at 700rpm for 0.75h, and make the mixed oil phase in the α-cyclodextrin / palm wax clathrate Under the action of the action, it is uniformly dispersed in water in the form of small droplets to obtain a Pic...
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