A sodium alginate and polyvinyl alcohol compound sponges material and preparation method thereof

A technology of polyvinyl alcohol and sodium alginate, applied in chemical instruments and methods, water/sludge/sewage treatment, medical science, etc., can solve the problem of less polyvinyl alcohol porous sponges, and achieve good biocompatibility, The effect of broad market prospect and stable preparation process

Inactive Publication Date: 2009-06-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few reports on polyvinyl alcohol porous sponges at home and abroad, mainly focusing on the resear...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] Above-mentioned composite sponge material, its preparation method comprises in sequence:

[0023] (1) Ingredients: Weigh sodium alginate, polyvinyl alcohol, inorganic acid, formaldehyde and foaming agent, the mass percentages of each raw material are: sodium alginate 1-11%, polyvinyl alcohol 5-25%, inorganic Acid 3-15%, formaldehyde 3-15%, foaming agent 1-5%, distilled water 29-87%;

[0024] (2) Thermal dissolution: heat and dissolve sodium alginate, polyvinyl alcohol and distilled water at a heating temperature of 80-100°C;

[0025] (3) Composite, acetalization and foaming: add mineral acid, formaldehyde, foaming agent to the mixture obtained in step (2), blend and stir;

[0026] (4) thermoforming: thermoforming the mixture obtained in step (3), the thermoforming temperature is 60-90°C, and the thermoforming time is 4-12 hours;

[0027] (5) Cleaning: after cleaning the thermoformed product in step (4), a composite sponge material of sodium alginate and polyvinyl alco...

Embodiment 1

[0030] Embodiment 1: the preparation of sodium alginate and polyvinyl alcohol composite sponge material

[0031] By weight, 5% of polyvinyl alcohol, 8% of sodium alginate and 74% of distilled water are condensed and refluxed at 80°C for dissolution, and then 6% of sulfuric acid, 6% of formaldehyde and 1% of foaming agent are added to the solution, fully mechanically After stirring, the blend is poured into a mold, thermoformed in an oven at 60°C for 6 hours, and finally washed.

Embodiment 2

[0032] Embodiment 2: the preparation of sodium alginate and polyvinyl alcohol composite sponge material

[0033] By weight, 5% of polyvinyl alcohol, 10% of sodium alginate and 69% of distilled water are condensed and refluxed at 90°C for dissolution, then 8% of sulfuric acid, 6% of formaldehyde and 2% of foaming agent are added to the solution, fully mechanically After stirring, the blend is poured into a mold, thermoformed in an oven at 70°C for 5 hours, and finally cleaned.

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PUM

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Abstract

The present invention provides sodium alginate and polyvinyl alcohol compound sponges material, wherein the component (wt) are as follows: sodium alginate 1-11%; polyvinyl alcohol 5-25%; inorganic acid 3-15%; methyl aldehyde 3-15%, aerating powder 1-5%; and distilled water 29-87% The preparation of the material are as following: heating sodium alginate, polyvinyl alcohol and distilled water for dissolving with heating temperature 80-100 DEG C; adding inorganic acid, methyl aldehyde and aerating powder for mixed stirring; heating mixed solution for forming with hot forming temperature 60-90 DEG C and hot forming time from 4 to 12 hours; And clean hot formed product. The present invention is provided with advantages like low cost, environment protection, simple process etc. The obtained material can be applied on wound dressing, vacuum sealing drainage, and hemostasia material etc. because of the good biocompatibility of polyvinyl alcohol and sodium alginate.

Description

technical field [0001] The invention relates to the field of polymer material science, in particular to a sodium alginate and polyvinyl alcohol composite sponge material and a preparation method thereof. Background technique [0002] Sodium alginate is one of the organic polymer electrolytes contained in kelp, giant algae and other brown algae, and forms the main component of cell membranes with other substances. Sodium alginate is favored for its unique functions of promoting wound healing, moisture absorption, moisturizing, good biocompatibility, and being absorbed by the human body. When it is applied to a wound dressing, after contacting with the pus and blood on the wound, a large amount of water enters into the sponge to form a colloid on the surface of the dressing. The dressing on the wound can form a layer of moist hydrogel, thereby providing a moist healing environment for the wound and accelerating wound healing. Polyvinyl alcohol has good tissue compatibility a...

Claims

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Application Information

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IPC IPC(8): C08L29/14C08L5/04C08J9/08A61L15/28A61L15/24C02F1/00
Inventor 樊李红吁磊郑化周月潘晓然
Owner WUHAN UNIV OF TECH
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