Method for coating chitosan slow-release membrane on outer surface of washing ball

Abstract

The invention discloses a method for coating a chitosan slow-release membrane on the outer surface of a washing ball. The method disclosed by the invention comprises the following steps of: modification of chitosan, preliminary coating of the washing ball, formation of the slow-release membrane, and after-treatment of the coated slow-release membrane; the method disclosed by the invention is simple in operation process, short in process flow, and easy to industrialize; moreover; compared with a blank washing ball which is not coated with the slow-release membrane, the washing ball coated with the chitosan slow-release membrane has the advantages that the dissolution rate of an active ingredient, namely, a surfactant, in the washing ball, can be effectively slowed and the quantity of the surfactant in the washing ball can be slowly reduced during a repeated use process, and then the times of normal repeated use of the washing ball can be increased and the washing cost is reduced; simultaneously, the slow-release membrane coated on the outer surface of the washing ball is made of chitosan which is a biodegradable material, so that pollution to environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of polymer material membranes, and relates to a method for coating a chitosan slow-release membrane on the outer surface of a laundry ball. Background technique [0002] Laundry balls are composed of surfactants, the active ingredients of washing, and their supporting framework. Because the laundry ball has better physical properties and washing effect than the traditional washing powder, it has received more and more attention. At present, the washing powder used in daily life on the market is easy to remain on the clothes, and the alkalinity is particularly strong, and the detergency is not very good. During use, a large amount of waste water will be generated, especially the use of phosphorus-containing washing powder, adding a series of environmental pollution. In particular, the phosphate in phosphorus-containing washing powder can stimulate algal blooms in the water, causing eutrophication and other ...

AI Technical Summary

Problems solved by technology

[0003] However, the following problems often occur during the use of laundry balls: due to the rapid dissolution rate of the active ingredient surfactant in the laundry balls, after repeated use of the laundry balls for several times, the remaining amount of surfactants in the laundry balls will decrease sharply , leading to a significant reduction in the number of times the laundry ball can be reused normally, and it is necessary to replace the new laundry ball more frequently to ensure the decontamination effect, which increases the laundry cost of the laundry ball

At present, a chitosan film with sustained release has been applied in the fields of pesticides and medicine, but it has not been reported for the sustained release coating of laundry balls.