A kind of modified sizing starch, surface sizing liquid and its preparation method and application

A technology for surface sizing and sizing starch, applied in textiles and papermaking, recycling technology, papermaking, etc., can solve the problems of complex preparation process and high preparation cost of surface sizing solution, achieve good system stability and improve water resistance. performance, the effect of reducing the Cobb value

Active Publication Date: 2022-06-07
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a modified sizing starch, a surface sizing solution and its preparation method and application in order to overcome the defects of complex surface sizing solution preparation process and high preparation cost in the prior art

Method used

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  • A kind of modified sizing starch, surface sizing liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1. Preparation of modified sizing starch

[0066] (1) under the condition that pH is 4.8~5.2, temperature is 50 ℃, and the condition of stirring, drop into glass reaction kettle 280g solid content is 27% pre-hydrolyzate, 6.3g mass percent are 32% sodium hydroxide aqueous solution , 25g tapioca starch, mixed evenly to prepare material A;

[0067] (2) under the condition that temperature is 50 ℃, add 0.08g ferrous sulfide and 2.5g mass percent of hydrogen peroxide aqueous solution that is 28% in material A, mix, continue to heat up, keep warm under the condition of 75-78 ℃ Stir for 2h to prepare material B;

[0068] (3) Mixing the material B, 0.8 g of sodium nitrite and 21.8 g of deionized water, cooling to room temperature, and discharging to obtain a modified surface sizing starch with a solid content of 30%.

[0069] 2. Preparation of surface sizing solution

[0070] Mixing the obtained modified sizing starch with an aqueous solution of corn starch with a solid cont...

Embodiment 2

[0072] 1. Preparation of modified sizing starch

[0073] (1) under the condition that pH is 4.8~5.2, temperature is 52 ℃, and stirring condition, drop 210g of pre-hydrolyzed solution that solid content is 24%, 4.8g mass percent of sodium hydroxide aqueous solution that is 40% in glass reactor , 19g cornstarch, mix evenly to prepare material A;

[0074] (2) under the condition that temperature is 50 ℃, add 0.03g chromium monoxide and 2g mass percent of hydrogen peroxide aqueous solution that is 28% in material A, mix, continue to heat up, keep stirring under the condition of 78-81 ℃ 1.5h, material B was obtained;

[0075] (3) Mixing the material B, 0.4 g of potassium iodide and 98 g of deionized water, cooling to room temperature, and discharging to obtain a modified surface sizing starch with a solid content of 31%.

[0076] 2. Preparation of surface sizing solution

[0077] Mixing the obtained modified sizing starch with an aqueous solution of corn starch with a solid cont...

Embodiment 3

[0079] 1. Preparation of modified sizing starch

[0080] (1) under the condition that pH is 4.8~5.2, temperature is 50 ℃, and stirring condition, put 160g of pre-hydrolyzed solution with solid content of 16%, 3.2g of sodium carbonate, 16g of wheat starch into glass reaction kettle, mix well, Material A is obtained;

[0081] (2) under the condition that temperature is 50 ℃, add 0.02g vanadium dichloride and 1.8g mass percent of hydrogen peroxide aqueous solution that is 28% in material A, mix, continue to heat up, under the condition of 75-78 ℃ Keep stirring for 1h to obtain material B;

[0082] (3) Mixing the material B, 0.3 g of tert-butanol and 109 g of deionized water, cooling to room temperature, and discharging to obtain a modified surface sizing starch with a solid content of 15%.

[0083] 2. Preparation of surface sizing solution

[0084] Mixing the obtained modified sizing starch with an aqueous solution of corn starch with a solid content of 10% according to a dry ...

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Abstract

The invention discloses a modified sizing starch, a surface sizing solution, a preparation method and application thereof. The preparation method of the modified sizing starch comprises the following steps: (1) under the condition that the pH is 3-6, mixing the pre-hydrolyzed solution and starch to obtain material A; (2) mixing material A, catalyst and peroxidized The hydrogen solution is mixed and kept warm to obtain material B; (3) material B is mixed with reducing agent to obtain modified sizing starch; in step (2), the catalyst is Fe-containing 2+ Compounds containing Cr 2+ compounds containing V 2+ Compounds containing Ti 3+ Compounds containing Co 2+ Compounds and Cu + one or more of the compounds. The raw material of the modified sizing starch in the present invention uses the pre-hydrolyzed solution to replace part of the starch, which reduces the cost; it does not need to enzymatically hydrolyze the starch, which saves workshop costs; the surface sizing solution in the present invention can effectively improve the water resistance of the paper, Lower the Cobb value of the paper.

Description

technical field [0001] The invention specifically relates to a modified sizing starch, a surface sizing liquid and a preparation method and application thereof. Background technique [0002] In recent years, the extraction and application of biomass resources has attracted people's attention. It is mainly derived from agricultural, forestry and marine product wastes, and has the characteristics of wide sources, low cost and biodegradability. By refining and modifying biomass resources, the original high-polluting and wasteful waste can be converted into high-value-added products, providing a new idea for replacing non-renewable resources and high-cost raw materials. Patent CN105566259A discloses a method for producing furfural by using eucalyptus pre-hydrolyzed liquid. By acidifying the pre-hydrolyzed liquid, the reaction temperature, acid dosage and gas extraction rate are optimized to improve furfural yield. Among them, eucalyptus is a renewable resource with abundant res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/18C08H8/00D21H19/14D21H21/16
CPCC08B31/18C08H8/00D21H19/14D21H21/16Y02W30/64
Inventor 施晓旦潘航金霞朝
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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