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Method for synthesizing grafted starch pulp by utilizing bioenzyme

A technology of grafting starch and biological enzymes, applied in textile and papermaking, fiber processing, fermentation and other directions, can solve the problems of imperfect production technology and varieties, and achieve the effects of uniform distribution of initiation points, superior performance and less investment in equipment.

Inactive Publication Date: 2011-10-12
湖北顶新环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, a lot of research has been done on grafted modified starch sizing at home and abroad and some achievements have been obtained. Perfect, can only replace 70% of PVA at most

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Utilize the method for synthesizing grafted starch size with biological enzyme, it comprises the following steps:

[0020] 1) Put the original starch (corn starch) in 60 In the Co-γ irradiation field, the irradiation is carried out under air conditions, and the irradiation dose is 4kGy (after the irradiation dose is set, follow the program, and the time is fixed), so that the covalent bonds of the original starch macromolecules are broken. , produce a large number of free radicals, and obtain irradiated starch;

[0021] 2) select debranching enzyme (debranching enzyme) to treat the irradiated starch: select irradiated starch and water according to the mass ratio of irradiated starch and water as 1:1, and set aside;

[0022] Mix the irradiated starch with water and banbury in a banbury mixer, the banbury temperature is 95°C, the banbury time is 30min (until the irradiated starch fully expands), then cool to 60°C, add calcium chloride solution and remove Branching enzym...

Embodiment 2

[0026] Utilize the method for synthesizing grafted starch size with biological enzyme, it comprises the following steps:

[0027] 1) Put the original starch (wheat starch) in 60 In the Co-γ irradiation field, the irradiation is carried out under air conditions, and the irradiation dose is 10kGy, so that the covalent bonds of the original starch macromolecules are broken, a large number of free radicals are generated, and irradiated starch is obtained;

[0028] 2) select debranching enzyme (debranching enzyme) to treat the irradiated starch: select irradiated starch and water according to the mass ratio of irradiated starch and water as 1:1, and set aside;

[0029] Mix the irradiated starch with water and banbury in a banbury mixer. The banbury temperature is 95°C, and the banbury time is 25min (until the irradiated starch fully expands), then cool to 50°C, add calcium chloride solution and remove Branching enzyme (isoamylase), continue banburying 60min (make debranching enzym...

Embodiment 3

[0033] Utilize the method for synthesizing grafted starch size with biological enzyme, it comprises the following steps:

[0034] 1) Put the original starch (potato starch) in 60 In the Co-γ irradiation field, the irradiation is carried out under air conditions, and the irradiation dose is 10kGy, so that the covalent bonds of the original starch macromolecules are broken, a large number of free radicals are generated, and irradiated starch is obtained;

[0035] 2) Selecting debranching enzyme to treat the irradiated starch: according to the mass ratio of irradiated starch and water as 1:0.8, select irradiated starch and water for later use;

[0036] Mix the irradiated starch with water and banbury in a banbury mixer. The banbury temperature is 95°C, and the banbury time is 25min (until the irradiated starch fully expands), then cool to 40°C, add calcium chloride solution and remove Branching enzyme (isoamylase), continue banburying 60min (make debranching enzyme and starch fu...

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Abstract

The invention relates to a preparation method for grafted starch pulp, in particular to a method for synthesizing grafted starch pulp by utilizing bioenzyme, which is characterized by comprising the following steps: 1) irradiating native starch in a <60>Co-gamma irradiation field to obtain irradiated starch; 2) treating the irradiated starch with a debranching enzyme: mixing the irradiated starch with water, carrying out internal mixing in an internal mixer, then cooling to 40-60 DEG C, adding a calcium chloride solution and the debranching enzyme, and continuing internal mixing for 30-60 minutes to obtain amylose; and 3) adding alpha-olefin to the amylose, heating to 110-140 DEG C, and continuing internal mixing for 30-60 minutes to obtain the grafted starch pulp, wherein the addition amount of the alpha-olefin is 6-10% of the irradiated starch by mass. The method has the advantages of simple process, low equipment investment and low cost, and can achieve a good sizing effect and good film sizing property.

Description

technical field [0001] The invention belongs to the technical field of starch size synthesis, in particular to a preparation method of grafted starch size. Background technique [0002] PVA is currently the most widely used chemical slurry, and its excellent weaving resistance has almost no alternative materials, but the fatal disadvantage of PVA is that it is not easy to biodegrade and seriously pollutes the environment. Therefore solving the pollution problem of PVA slurry is a very urgent important problem. To solve the pollution problem of PVA, to a large extent, rely on the development of new slurry to replace PVA. [0003] Grafted starch size is a new generation of modified starch obtained by graft copolymerization of starch and vinyl monomer. It not only has the characteristics of good adhesion of starch to hydrophilic fibers, but also has good adhesion of polymers to hydrophobic fibers. Adhesion characteristics, while the price is lower than synthetic size, and can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C12P19/16D06M15/21
Inventor 王晓广吴海燕王霞汤月华
Owner 湖北顶新环保新材料有限公司
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