High-ultraviolet absorption lignin/chemical sun-screening agent microcapsule and preparation method therefor

摘要

The present invention, belonging to the technical field of chemical sun-screening agent preparation, discloses a high-ultraviolet absorption lignin/chemical sun-screening agent microcapsule using lignin as a wall material and a preparation method therefor. The method of the present invention comprises the following steps: (1) dissolving 1-20 parts by weight of lignin in 100-200 parts by weight of an aqueous solution with a pH of 12, adjusting the pH of the solution to 7-10, and then removing insoluble substances by filtration to obtain a lignin solution; and (2) mixing 10-50 parts by weight of the lignin solution in step (1) with 1-10 parts by weight of a chemical sun-screening agent, and performing ultrasonic radiation under a power of 200-1500 W for 10 s to 25 min to obtain a lignin/chemical sun-screening agent microcapsule emulsion. The lignin/chemical sun-screening agent microcapsule of the present invention has excellent ultraviolet absorption performance, can avoid photodegradation of the chemical sun-screening agent, and has good stability; and it effectively prevents the chemical sun-screening agent from directly contacting and hurting the skin, having great application prospects in the field of sun-screening skincare products.