Starch-chitosan compound, method for its manufacture and application

A mixture, chitosan technology, applied in starch coatings, chitin polysaccharide coatings, addition of inorganic compounds, etc., can solve the problems of huge cost and lack of environmental compatibility.

Inactive Publication Date: 2008-08-13
EMSLAND STARKE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials are of concern due to their lack of env

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: the production of paper starch-chitosan mixture

[0048] 3 g of cold-water-soluble chitosan was dried with 97 g of pre-oxidatively cracked low-viscosity (25 mPas at a concentration of 10% at 50° C.) bean starch (amylose content > 35% by weight) mix. A 7% (by weight) aqueous solution was prepared from the mixture, and the solution was applied to a weight per unit area of ​​80 g / m with a laboratory glue clip (Laborleimpresse). 2 On the base paper (Basispapier). Base paper treated in the same way with the corresponding bean starch alone, without adding chitosan, was used as a reference. The resulting two papers were then subjected to the air permeability tests described in Table 1.

[0049] Paper Coating Inspection

[0050] Table 1: Decrease in air permeability of paper sheets coated with starch-chitosan mixture. (Tested according to Gurley method ISO 5636).

[0051] Starch component

Embodiment 2

[0052] Embodiment 2: the preparation of paper starch-chitosan mixture

[0053] 1.5g cold water-soluble chitosan and 98.5g cationized potato starch (amyloid) with a replacement rate of DS=0.020 and a viscosity of 40mPas (when the concentration is 20% at 50°C) are reduced by oxidation with 98.5g. starch content > 20%) dry mix. Prepare a 12% aqueous solution from this mixture, and apply the solution to a weight per unit area of ​​80 g / m with laboratory rubber clips. 2 on the base paper. With simple corresponding potato starch derivative, do not add chitosan, base paper processed in the same way is used as a reference, then two kinds of papers of gained are carried out water absorption test (table 2) and dry tensile property test ( pull speed, table 3).

[0054] Table 2: Hydrophobic properties of starch-chitosan mixtures (decreased water absorption according to Cobb, method DIN 53132).

[0055] Starch component

[0056] The formation of a further closed starch...

Embodiment 3

[0060] Example 3: Production of starch-chitosan mixtures for textile fibers

[0061] 1 g of water-soluble modified chitosan having a pH of 7 was mixed with 99 g of amphoteric, polysaccharide-containing decomposed hydroxylated starch. This mixture was processed to a consistency of 5% and used as a slurry.

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PUM

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Abstract

Starch-chitosan mixture (I) comprises water-soluble chitosan (0.1-50, preferably 0.5-20 wt.%), and optionally other additives such as inorganic- or organic pigments, aluminum oxide, barium sulfate, calcium carbonate, kaolin, titanium dioxide, talc, satin white, silicates and plastic pigments. An independent claim is included for the preparation of (I) comprising: mixing a water-soluble chitosan (50-99.9 wt.%) with starch (0.1-50, preferably 0.5-20 wt.%); preparing an aqueous solution of the mixture; treating the aqueous solution in a spray boiler; and drying the boiled product.

Description

technical field [0001] The present invention relates to starch-chitosan mixture for improving the physical and chemical properties of fiber materials and chemical fiber products, such as single fibers, glass fibers and textile fibers, and the manufacture and application thereof, and the chemical fiber products especially refer to paper and cardboard , cartons, fiberglass fabrics and textile fiber products. Background technique [0002] Natural or chemically modified starch is usually used as an auxiliary material in the treatment of fiber products or in the production of fiber products, for example, to increase the strength or improve the surface properties of fiber products, the processability and smoothness of fiber products and in the production process. Among them, fiber products are those based on wood fibers, cellulose, ground wood fibers (for pulp), recycled fiber materials, such as paper, paper (for walls), cardboard, synthetic fiber products, glass Fiber products, ...

Claims

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Application Information

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IPC IPC(8): C08L5/08D06M15/11C03C25/24D06N7/00C08L3/02D06M101/06
CPCD06M2200/40D21H17/67C08L5/08C08B37/003D21H21/18D21H19/54C09D103/02C08L3/02C08L3/04D06M15/11D06M15/03C09D105/08D21H21/28C08L2666/26
Inventor 詹·迪吉克斯特休斯卡尔-卢德威格·沃尔萨拜因·拉梅克-斯塔姆
Owner EMSLAND STARKE GMBH
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