Porous chitosan microcapsule fragrance-retaining bead and high-stability laundry condensate bead
A technology of porous chitosan and microcapsules, applied in the directions of microcapsule preparation, surface active detergent composition, microsphere preparation, etc., can solve the problem that the appearance is not beautiful, reduce the slow-release effect of the fragrance beads capsule, and the bead laundry liquid system. turbidity and other problems, to improve storage stability, improve anti-dissolution performance, and improve the effect of embedding rate
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Embodiment 1
[0035] A kind of preparation method of porous chitosan microcapsule fragrance beads of the present embodiment comprises the following preparation steps:
[0036] (1) Chitosan (CS) and PVA are respectively added in the acetic acid aqueous solution of 1wt.% by mass ratio as 1:0.2,1:0.4,1:0.5,1:0.6,1:0.8,1:1, The mass concentration of CS added is 2%. Heating to 75-80° C., stirring and dissolving to obtain a mixed solution evenly, and spray-drying the mixed solution at a temperature of 105-115° C. to obtain a mixed powder.
[0037] (2) The mixed powder obtained in step (1) is added into an aqueous NaOH solution with a mass concentration of 0.5%, heated to 75-80° C., stirred and washed, dissolved to remove the PVA component, centrifuged to separate the solid phase, and washed with pure water until neutral. Porous chitosan microspheres were obtained.
[0038] (3) Disperse the porous chitosan microspheres obtained in step (2) into an ethanol aqueous solution with an alcohol-to-wate...
Embodiment 2
[0046] A kind of preparation method of porous chitosan microcapsule fragrance beads of the present embodiment comprises the following preparation steps:
[0047] (1) Chitosan (CS) and PVA were added to 1wt.% acetic acid aqueous solution at a mass ratio of 1:0.5, and the mass concentration of CS added was 2%. Heating to 75-80° C., stirring and dissolving to obtain a mixed solution evenly, and spray-drying the mixed solution at a temperature of 105-115° C. to obtain a mixed powder.
[0048] (2) The mixed powder obtained in step (1) is added into an aqueous NaOH solution with a mass concentration of 0.5%, heated to 75-80° C., stirred and washed, dissolved to remove the PVA component, centrifuged to separate the solid phase, and washed with pure water until neutral. Porous chitosan microspheres were obtained.
[0049] (3) Disperse the porous chitosan microspheres obtained in step (2) into ethanol aqueous solutions with alcohol-to-water ratios (v / v) of 1:0.5, 1:0.6, 1:0.7, 1:0.8, ...
Embodiment 3
[0056] A kind of preparation method of porous chitosan microcapsule fragrance beads of the present embodiment comprises the following preparation steps:
[0057] (1) Chitosan (CS) and PVA were added to 1wt.% acetic acid aqueous solution at a mass ratio of 1:0.5, and the mass concentration of CS added was 2%. Heating to 75-80° C., stirring and dissolving to obtain a mixed solution evenly, and spray-drying the mixed solution at a temperature of 105-115° C. to obtain a mixed powder.
[0058] (2) The mixed powder obtained in step (1) is added into an aqueous NaOH solution with a mass concentration of 0.5%, heated to 75-80° C., stirred and washed, dissolved to remove the PVA component, centrifuged to separate the solid phase, and washed with pure water until neutral. Porous chitosan microspheres were obtained.
[0059] (3) Disperse the porous chitosan microspheres obtained in step (2) into an ethanol aqueous solution with an alcohol-to-water ratio (v / v) of 1:0.7, and then add poro...
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Abstract
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