Preparation method of plant-source slow-release anti-mosquito microcapsule
A technology of microcapsules and plant sources, applied in textiles, papermaking, fiber treatment, etc., can solve problems such as difficult to achieve mosquito repellent effect
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[0026] A preparation method of plant-derived slow-release anti-mosquito microcapsules comprises the following specific steps;
[0027] S1. Extraction of plant-derived anti-mosquito active ingredients;
[0028] Anti-mosquito active ingredients Peppermint extract: Ginger oil extract: Red eucalyptus extract obtained by ultrasonic extraction;
[0029] S1 During the extraction process of plant-derived anti-mosquito active ingredients, the mass ratio of mint extract: sand ginger oil extract: red eucalyptus extract is 1:1-2:1-3, and the material ratio is 1:10-30;
[0030] S1 During the extraction process of plant-derived anti-mosquito active ingredients, the ultrasonic temperature is 20-50°C, and the ultrasonic time is 20-60min;
[0031] S2, preparation of anti-mosquito microcapsules;
[0032] Mix mint extract: sand ginger oil extract: red eucalyptus extract with cyclohexane, and gradually add emulsifier, 1% PVA and distilled water, and stir evenly at low speed as a continuous phas...
Embodiment 1
[0042] S1. Extraction of plant-derived anti-mosquito active ingredients;
[0043] Ultrasonic extraction of plant-derived anti-mosquito active ingredients, material ratio: 1:10, ultrasonic temperature 50 ° C, ultrasonic time 60 minutes.
[0044] S2, preparation of anti-mosquito microcapsules;
[0045] Take anti-mosquito effective ingredients mint extract: ginger oil extract: red eucalyptus extract = 1: 1: 1: cyclohexane = 1: 1, add emulsifier, 1% PVA and distilled water and stir evenly, as a dispersed phase , add a small amount of emulsifier, 1% concentration of PVA and distilled water and stir evenly at low speed, as the continuous phase. At a uniform rotation speed, gradually add the dispersed phase to the continuous phase, adjust to the highest stirring speed after the dropwise addition, and obtain a stable o / w emulsion after 10 minutes. Slowly add the prepared aqueous solution of terephthaloyl chloride and ethylenediamine with a concentration of 2% to the o / w emulsion in ...
Embodiment 2
[0047] S1. Extraction of plant-derived anti-mosquito active ingredients;
[0048] Ultrasonic extraction of plant-derived anti-mosquito active ingredients, material ratio: 1:30, ultrasonic temperature 40°C, ultrasonic time 40min.
[0049] S2, preparation of anti-mosquito microcapsules;
[0050] Take anti-mosquito effective ingredients mint extract: sand ginger oil extract: red eucalyptus extract = 1:2:3: cyclohexane = 1:2, add emulsifier, 1% PVA and distilled water and stir evenly, as a dispersed phase , add a small amount of emulsifier, 1% concentration of PVA and distilled water and stir evenly at low speed, as the continuous phase. At a uniform rotation speed, gradually add the dispersed phase to the continuous phase, adjust to the highest stirring speed after the dropwise addition, and obtain a stable o / w emulsion after 20 minutes. Slowly add the prepared aqueous solution of terephthaloyl chloride and ethylenediamine with a concentration of 2% to the o / w emulsion in a rat...
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