A kind of sponge material and its preparation method and application

Abstract

The invention provides a sponge material as well as a preparation method and application thereof. The preparation method of the sponge material has a simple process; the specific addition reaction sequence is used; after the polyvinyl alcohol crosslinking to a certain degree, chitosan solids are added for further reaction; the consumption proportion of the chitosan can be obviously improved; the chitosan can sufficiently take part in the crosslinking reaction; the condition of excessive chitosan falling in the obtained sponge material cannot be caused; the comprehensive performance such as porosity, water absorption rate, moisture preservation rate and ventilation rate of the obtained sponge material can be sufficiently ensured; meanwhile, the obtained sponge material can achieve an excellent treatment effect on the affected part. The sponge material has high chitosan content ratio, high porosity, high water absorption rate, high moisture preservation rate, high ventilation rate and excellent comprehensive performance. The sponge material can be used as medical dressing; the excellent treatment effect can be achieved on the affected part.

Description

technical field [0001] The invention relates to the technical field of polymer foaming materials, in particular to a sponge material and its preparation method and application. Background technique [0002] In recent years, many materials and treatment methods have been invented for the treatment of trauma, among which the vacuum sealing drainage treatment technology has been widely recognized and used. The core material of this treatment method, polyvinyl alcohol sponge (PVA FOAM, PVF or polyvinyl alcohol foam), has good strength, elasticity, softness and biocompatibility. Under negative pressure, it exerts uniform pressure on the wound surface and plays a role in hemostasis. The negative pressure makes the secretion of the wound surface drained into the collection bottle through the open pore structure of the sponge, thus playing the role of cleaning the wound surface. This treatment method reduces the number of dressing changes, accelerates wound healing, and reduces pa...

AI Technical Summary

Problems solved by technology

[0005] In related technologies, polyvinyl alcohol solution and chitosan solution are mostly used for homogeneous crosslinking reaction, but in this case, chitosan can only be added in a very low amount, and the addition of a large amount of chitosan will significantly Increasing the viscosity of the reaction system hinders the smooth progress of the foaming process. At the same time, increasing the proportion of chitosan also makes it difficult to maintain the crosslinking reaction between polyvinyl alcohol and chitosan in a homogeneous system.

Adopt the method of related technology, if increase the consumption of chitosan, will cause a large amount of chitosan not to participate in the cross-linking reaction, the product after curing is in actual use, the chitosan that does not participate in the cross-linking reaction will be Very easy to fall off directly or block the foaming channel

Under the situation that the dosage of chitosan is limited in the related art, the obtained product is difficult to reflect the therapeutic effect to the affected part again

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