Method for processing polysaccharide material with polymer composition

A technology of polysaccharides and compositions, which is applied in the field of processing polysaccharide materials with polymer compositions, to achieve the effect of improving dimensional stability

Inactive Publication Date: 2010-09-15
吕品桦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this kind of polymer reaction has not been widely used in the treatment

Method used

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  • Method for processing polysaccharide material with polymer composition
  • Method for processing polysaccharide material with polymer composition
  • Method for processing polysaccharide material with polymer composition

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1:

[0040] Dissolve 432g maltodextrin, 192g citric acid, and 9g boric acid in 1.16kg water, and stir the solution until the solution is clear and transparent. Put three 100×60×20 (unit: mm) cedar wood boards in the autoclave, firstly pump to 90% vacuum, maintain the vacuum for 30 minutes, then pour the above solution into the autoclave, and wait for the solution to be added When finished, gradually increase the pressure to 18 atmospheres. Maintain the pressure for 5 hours, then gradually reduce the pressure to normal pressure, and draw the solution from the reactor. Reduce the pressure to 80% vacuum for about 20 minutes, and then dry the wood board at 95°C under normal pressure for 24 hours. After drying, the wood block is treated with high-pressure steam at 180°C for 10 minutes in an autoclave, and then restored to normal temperature and pressure to obtain a composite polymer product. The comparison data of wood before and after treatment are as follows:

[004...

Example Embodiment

[0042] Example 2:

[0043] Dissolve 300g of water-soluble starch, 25g of citric acid, 48g of tartaric acid, 48g of maleic acid, 20g of triethanolamine, 5g of zinc bromide, 2g of ammonium phosphate in 1.16kg of water, adjust the pH to 6 with 30% ammonia, and stir. Solution until the solution is clear and transparent. Put three 100×60×20 (unit: mm) paulownia wood boards in the autoclave, firstly pump to 85% vacuum, maintain the vacuum for 30 minutes, then pour the above solution into the autoclave, and wait for the solution to be added After that, gradually increase the pressure to 22 atmospheres. Maintain the pressure for 3 hours, then gradually reduce the pressure to normal pressure, and draw the solution from the reactor. Reduce the pressure to 80% vacuum for about 20 minutes, and then dry the wood board at 110°C under normal pressure for 24 hours. After drying, the wood block is treated with high-pressure steam at 180°C for 10 minutes in an autoclave, and then restored to no...

Example Embodiment

[0045] Example 3:

[0046] Dissolve 250g polyhydroxyacrylic acid, 20g 4-hydroxythreonine, 227g glucaric acid, 15g terephthalic acid, 15g maleic anhydride, 10g boric acid, 2.5g zinc acetate and 2g ammonium phosphate in 1.23kg water. Adjust the pH to 6 with 30% ammonia water, and stir the solution until the solution is clear and transparent. Put 3 pieces of 200×25×5 (unit: mm) bamboo pieces in the autoclave, firstly evacuate to 90% vacuum and maintain the vacuum for 30 minutes, then pour the above solution into the autoclave, and wait for the solution to be added When finished, gradually increase the pressure to 20 atmospheres. Maintain the pressure for 3.5 hours, then gradually reduce the pressure to normal pressure, and draw the solution from the reactor. Reduce the pressure to 80% vacuum for about 20 minutes, and then dry the wood board at 110°C under normal pressure for 24 hours. After drying, equilibrate in a constant temperature and humidity box for 48 hours to obtain a co...

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Abstract

The invention discloses a method for processing a polysaccharide material with a polymer composition. The method comprises the following steps of: (1) providing a polymer composition which contains at least one multi-hydroxyl compound and at least one compound containing more than one functional group with reaction activity with hydroxyls; (2) enabling the polymer composition to enter the polysaccharide material; and (3) processing the polysaccharide material so that the multi-hydroxyl compound and the compound containing more than one functional group with reaction activity with hydroxyls in the polymer composition are polymerized with the polysaccharide material to form a water-insoluble composite polymer product. The polysaccharide material obtained by using the method has greatly improved physical performance, moisture-proof and heat-resist performance and size stability.

Description

technical field [0001] The invention relates to a method for treating polysaccharide materials with a polymer composition, in particular to a method for treating polysaccharide materials with a polymer composition containing polyhydroxy compounds and functional groups reactive with hydroxyl groups. Background technique [0002] Naturally occurring polysaccharide materials come from a wide range of sources, and the main components are cellulose, hemicellulose, starch, chitosan, etc. Representatives of such natural polysaccharide materials include wood, bamboo, rattan, straw and the like. Although these natural materials have their own uses, they are often insufficient in strength, hardness, moisture resistance, heat resistance stability, and dimensional stability. Traditional methods of processing such materials include physical and chemical methods. The physical method is mainly to strengthen such polysaccharide materials by applying pressure. The chemical method mainly a...

Claims

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Application Information

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IPC IPC(8): B27K3/50
Inventor 资虹
Owner 吕品桦
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