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Gelatin/polyvinyl alcohol composite sponge and preparation method thereof

A technology of polyvinyl alcohol and composite sponge, applied in medical science, absorbent pads, prostheses, etc., to achieve the effect of low cost, simple process, and good viscoelasticity

Inactive Publication Date: 2011-02-16
樊李红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented new type of plaster composition described in the current state of technology allows for combining different types of ingredients together without adding any other chemical components. It achieves these benefits over existing compositions but still maintain their original functionality.

Problems solved by technology

The technical problem addressed in this patented text relates how to create an effective material made up entirely of gels called gelat without harmful chemical substances like formaldehyde found commonly associated with other types of polymers (like vinyl chloride).

Method used

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  • Gelatin/polyvinyl alcohol composite sponge and preparation method thereof
  • Gelatin/polyvinyl alcohol composite sponge and preparation method thereof
  • Gelatin/polyvinyl alcohol composite sponge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of gelatin / polyvinyl alcohol composite sponge comprises the steps:

[0026] Add polyvinyl alcohol and gelatin according to the weight percentage of each raw material: 9 wt% polyvinyl alcohol with a degree of polymerization of 1700, 1 wt% gelatin, and 72 wt% water, put them into a three-necked bottle, reflux and dissolve at 90°C for 100 minutes, Pour the solution into a beaker, add 10wt% hydrochloric acid, 7wt% formaldehyde and 1wt% sodium lauryl sulfate, stir and mix evenly, pour the blend into a mold, and thermoform in an oven at 80°C for 10h to obtain gelatin / Polyvinyl alcohol composite sponge. The elongation at break of the obtained gelatin / polyvinyl alcohol composite sponge was 348%, and the water absorption rate was 1261%. The pore structure of the resulting gelatin / polyvinyl alcohol composite sponge is shown in figure 2 . figure 2 shows the internal network structure of the gelatin / polyvinyl alcohol composite sponge, from figure 2 W...

Embodiment 2

[0028] The preparation method of gelatin / polyvinyl alcohol composite sponge comprises the steps:

[0029] Add polyvinyl alcohol and gelatin according to the weight percentage of each raw material: 9wt% of polyvinyl alcohol with a degree of polymerization of 1700, 3.86wt% of gelatin, and 69.14wt% of water, put them into a three-necked bottle, reflux and dissolve at 90°C for 100min , pour the solution into a beaker, add 10wt% hydrochloric acid, 7wt% formaldehyde and 1wt% sodium lauryl sulfate, stir and mix evenly, pour the blend into a mold, and thermoform it in an oven at 80°C for 10h to obtain Gelatin / polyvinyl alcohol composite sponge. The elongation at break of the obtained gelatin / polyvinyl alcohol composite sponge was 353%, and the water absorption was 1255%. The pore structure of the resulting gelatin / polyvinyl alcohol composite sponge is shown in image 3 . image 3 shows the internal network structure of the gelatin / polyvinyl alcohol composite sponge, from image 3 ...

Embodiment 3

[0031] The preparation method of gelatin / polyvinyl alcohol sponge comprises the steps:

[0032] Add polyvinyl alcohol and gelatin according to the weight percentage of each raw material: 9wt% of polyvinyl alcohol with a degree of polymerization of 1700, 9wt% of gelatin, and 64wt% of water. Pour the solution into a beaker, add 10wt% hydrochloric acid, 7wt% formaldehyde and 1wt% sodium lauryl sulfate, stir and mix evenly, pour the blend into a mold, and thermoform it in an oven at 80°C for 10h to obtain gelatin / Polyvinyl alcohol composite sponge. The elongation at break of the obtained gelatin / polyvinyl alcohol composite sponge was 326%, and the water absorption rate was 1249%. The pore structure of the resulting gelatin / polyvinyl alcohol composite sponge is shown in Figure 4 . Figure 4 shows the internal network structure of the gelatin / polyvinyl alcohol composite sponge, from Figure 4 We can clearly see that the pores of the gelatin / polyvinyl alcohol composite sponge a...

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Abstract

The invention relates to a gelatin/polyvinyl alcohol composite sponge which is a porous material suitable for stopping bleeding and being applied to wounds. The composite sponge is prepared with gelatin and polyvinyl alcohol as the raw materials and comprises the following raw materials by weight: 1-9% of gelatin, 7-9% of polyvinyl alcohol, 7-10% of inorganic acid, 7-12% of formaldehyde, 0.6-4% of foaming agent and the balance water. A preparation method of the composite sponge comprises thermal dissolution, acetalization and foaming of polyvinyl alcohol and compositing of polyvinyl alcohol and gelatin. During preparation, the polyvinyl alcohol which undergoes complete alcoholysis or incomplete alcoholysis and has degree of polymerization of 1700-2000 is selected as the raw material, the gelatin and the polyvinyl alcohol are mixed in water and heated and dissolved, then acid, formaldehyde and the foaming agent are added to the mixture to be blended and the mixture is heated and formed in an oven, thus obtaining the composite sponge. The method can prepare the composite sponge with higher water absorbing capacity, better flexibility and viscoelasticity and good biocompatibility and the advantages of low cost, environmental protection and simple process, and the obtained material can be applied to treating wound cavity infection, burns, skin grafting, etc.

Description

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Claims

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Application Information

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Owner 樊李红
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