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Anti-fracture starch slurry and preparation method thereof

A starch size and anti-cracking technology, which is applied in fiber types, textiles and papermaking, fiber treatment, etc., can solve the problems of not meeting the flexibility requirements of the size film and complicated manufacturing process, and improve the initiation efficiency and size film performance Improvement and flexibility enhancement effect

Inactive Publication Date: 2019-06-25
湖北顶新环保新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this patent, a variety of modified starch size products are mixed, not only the manufacturing process is relatively complicated, but also the flexibility requirement of the size film cannot be met when only a certain type of modified starch is used.

Method used

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  • Anti-fracture starch slurry and preparation method thereof

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preparation example Construction

[0024] The invention provides a kind of preparation method of anti-cracking starch size, comprises the following steps:

[0025] (1) adding water to gelatinize cornstarch after irradiation treatment to obtain gelatinized starch;

[0026] (2) vinyl acetate, acrylic acid and initiator are mixed to carry out polymerization reaction, obtain copolymer;

[0027] (3) adding ammonium persulfate and sodium bisulfite to initiate graft copolymerization after mixing the copolymer and gelatinized starch, and obtaining the anti-cracking starch slurry after neutralization with alkali;

[0028] The steps (1) and (2) are not limited by time sequence.

[0029] In the invention, the cornstarch is irradiated and gelatinized by adding water to obtain the gelatinized starch. In the present invention, the moisture content of the cornstarch is preferably 60 For Co-γ, the irradiation dose is preferably 4-40 kGy, more preferably 20-40 kGy, even more preferably 30-40 kGy. The present invention adopts...

Embodiment 1

[0039] A kind of anti-cracking starch size, its preparation comprises the following steps:

[0040] (1) Take 300g of cornstarch (moisture content 14%) and place 60 Co-γ irradiation field irradiation, the irradiation dose is 4kGy, add water 9 times the weight of the irradiation powder, put it in a glass reactor, protect it with nitrogen, raise the temperature from room temperature to 95°C, and gelatinize for 30 minutes. And keep warm for 30 minutes to obtain gelatinized starch;

[0041] (2) Take 700 g of monomers (550 g of vinyl acetate, 150 g of acrylic acid) and 2 g of dimethyl azobisisobutyrate in a 69° C. water bath for 40 minutes, protect with nitrogen, and stir at a speed of 200 rpm to obtain a copolymer;

[0042] (3) the gelatinized starch of step (1) is cooled to 65 ℃ and the copolymer is mixed uniformly, and then simultaneously start to drip the ammonium sulfate aqueous solution (containing ammonium sulfate 4.5g) that concentration is 10wt.% and concentration is that ...

Embodiment 2

[0044] A kind of anti-cracking starch slurry, has improved irradiation dosage with respect to embodiment 1, and its preparation comprises the following steps:

[0045] (1) Take 300g of cornstarch (moisture content 14%) and place 60 Co-γ irradiation field irradiation, the irradiation dose is 20kGy, add water 9 times the weight of the irradiation powder, put it in a glass reactor, protect it with nitrogen, raise the temperature from room temperature to 95°C, and gelatinize for 30 minutes. And keep warm for 30 minutes to obtain gelatinized starch;

[0046] (2) Take 700 g of monomers (550 g of vinyl acetate, 150 g of acrylic acid) and 2 g of dimethyl azobisisobutyrate in a 69° C. water bath for 40 minutes, protect with nitrogen, and stir at a speed of 200 rpm to obtain a copolymer;

[0047] (3) the gelatinized starch of step (1) is cooled to 65 ℃ and the copolymer is mixed uniformly, and then simultaneously start to drip the ammonium sulfate aqueous solution (containing ammonium ...

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Abstract

The invention provides an anti-fracture starch sizing agent and a preparation method thereof, and belongs to the technical field of sizing agents for spinning. The method comprises the steps that cornstarch is subjected to irradiation treatment, and then water is added for gelatinization to obtain gelatinized starch; vinyl acetate, acrylic acid and an initiator are mixed for a polymerization reaction to obtain a copolymer; and the copolymer is mixed with the gelatinized starch, ammonium sulfate and sodium hydrogen sulfite are then added to initiate graft copolymerization reaction, and alkaliis added for neutralization to obtain the anti-fracture starch slurry. Acrylic acid and vinyl acetate are adopted for copolymerization, so that the reaction is easy to control, and the obtained copolymer is longer in molecular chain and better in flexibility. A redox system composed of ammonium persulfate and sodium hydrogen sulfite is adopted to initiate a graft copolymerization reaction, so thatthe method is simple to operate and high in grafting efficiency. The breaking strength of a slurry film formed by the anti-breaking starch slurry is greater than 40.08 N / mm<2>, the elongation at break is greater than 3.7%, and the anti-breaking starch slurry has good anti-breaking performance.

Description

technical field [0001] The invention belongs to the technical field of textile size, and in particular relates to an anti-cracking starch size and a preparation method thereof. Background technique [0002] The textile processing process is to spin the fiber into yarn and then weave it into cloth. Before the yarn is woven into cloth, the warp yarn must be sized to improve the weavability of the yarn, so that the yarn will be lint-free and less broken during the weaving process; The warp yarns of a small part of strands, strong twisted yarns and some textured yarns do not need sizing, while other forms of warp yarns need sizing. After the weaving process is completed, the size on the gray cloth will affect the water absorption performance of the fabric and the dyeing quality of the product. In order to reduce the consumption of dyeing chemicals, it is necessary to desizing before dyeing. The wastewater produced by scouring and desizing in printing and dyeing generally accoun...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08F218/08C08F220/06D06M15/37D06M15/11D06M15/333D06M101/06D06M101/32
Inventor 王晓广周盼黄年华王海清夏发明张文馨肖成
Owner 湖北顶新环保新材料有限公司
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