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Preparation method of cationic nano-microcrystalline cellulose reinforced papermaking surface sizing agent

A technology of surface sizing agent and nano-crystallite, which is applied in the field of pulp and paper making, can solve problems affecting the rheological properties of emulsions, sizing properties, adsorption and agglomeration, etc., and achieve the effects of potential application value, cost control reduction, and abundant raw materials

Active Publication Date: 2018-06-01
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the negative charge of nano-microcrystalline cellulose, when it encounters cationic surface sizing agent, serious adsorption and agglomeration will occur, which will definitely affect the rheological properties of the emulsion and its sizing performance on the paper surface

Method used

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  • Preparation method of cationic nano-microcrystalline cellulose reinforced papermaking surface sizing agent
  • Preparation method of cationic nano-microcrystalline cellulose reinforced papermaking surface sizing agent
  • Preparation method of cationic nano-microcrystalline cellulose reinforced papermaking surface sizing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Based on edible starch, pipette amylase at an amount of 150-200 ppm, add it to a certain amount of distilled water, and slowly add edible starch at a stirring speed of 700-800 rpm to make it completely dispersed. And put it in an 80ºC water bath, stir and gelatinize for 25 minutes; finally, heat it in a 130ºC oil bath for 3 minutes to inactivate the enzyme; keep it warm at 60ºC and follow the amount of 5% (as edible starch As the benchmark), the cationic styrene-acrylic emulsion was pipetted and uniformly dispersed for 30 min at a stirring speed of 400 rpm.

[0026] Do not add cationic nano-microcrystalline cellulose sol, directly add distilled water until the solid content of all samples is 10%, that is, get a papermaking surface sizing agent with zero addition; add a defoamer to the system as needed, and use aluminum sulfate The pH of the solution was adjusted to 4~5; finally, the sample was placed in a 60 ºC water bath to keep warm, and stirred continuously to disper...

Embodiment 2

[0029] Based on edible starch, pipette amylase at an amount of 150-200 ppm, add it to a certain amount of distilled water, and slowly add edible starch at a stirring speed of 700-800 rpm to make it completely dispersed. And put it in an 80ºC water bath, stir and gelatinize for 25 minutes; finally, heat it in a 130ºC oil bath for 3 minutes to inactivate the enzyme; keep it warm at 60ºC and follow the amount of 5% (as edible starch As the benchmark), the cationic styrene-acrylic emulsion was pipetted and uniformly dispersed for 30 min at a stirring speed of 400 rpm.

[0030] Based on the amount of edible starch, 0.2% cationic nanocrystalline cellulose sol was added to the above system, and distilled water was added until the solid content of all samples was 10%, that is, cationic nanocrystalline cellulose-enhanced surface-making applications were obtained. Glue; add defoamer dropwise to the system as needed, and adjust the pH to 4~5 with aluminum sulfate solution; finally, put t...

Embodiment 3

[0033] Based on edible starch, pipette amylase at an amount of 150-200 ppm, add it to a certain amount of distilled water, and slowly add edible starch at a stirring speed of 700-800 rpm to make it completely dispersed. And put it in an 80ºC water bath, stir and gelatinize for 25 minutes; finally, heat it in a 130ºC oil bath for 3 minutes to inactivate the enzyme; keep it warm at 60ºC and follow the amount of 5% (as edible starch As the benchmark), the cationic styrene-acrylic emulsion was pipetted and uniformly dispersed for 30 min at a stirring speed of 400 rpm.

[0034]Based on the amount of edible starch, 0.4% cationic nano-microcrystalline cellulose sol was added to the above system, and distilled water was added until the solid content of all samples was 10%, that is, a cationic nano-microcrystalline cellulose-enhanced papermaking surface coating was obtained. Glue; add defoamer dropwise to the system as needed, and adjust the pH to 4~5 with aluminum sulfate solution; fi...

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Abstract

The invention relates to a preparation method for a cation nanocrystalline cellulose enhanced papermaking surface sizing agent.According to the preparation method, firstly, edible corn starch is gelatinized and compounded with cation styrene-acrylic emulsion; secondly, cation nanocrystalline cellulose is used for enhancing the composite emulsion; lastly, a Mayer coating machine is used for conducting surface sizing on fine dried noodle cardboard paper.According to the prepared surface sizing agent, the edible corn starch and the nanocrystalline cellulose are used as main raw materials, application of synthetic latex cation styrene-acrylic emulsion is omitted, and this conforms to the strategy of sustainable development.The cation nanocrystalline cellulose enhanced papermaking surface sizing agent is simple in preparation process and good in flowing property, a good barrier property is given to the paper, and meanwhile the mechanical property and surface property of the paper can be improved.

Description

technical field [0001] The invention relates to the field of pulping and papermaking, in particular to a preparation method and application of a cationic nano-microcrystalline cellulose-reinforced papermaking surface sizing agent. technical background [0002] With the acceleration of the process of globalization, people pay more and more attention to the environmental pollution caused by petroleum products, which is replaced by the research and application of new natural polymer products based on biomass. As the most abundant natural renewable biomass raw material on the earth, cellulose has many excellent characteristics, such as complete degradability, good biocompatibility and easy chemical modification, etc., so it has become a very popular at home and abroad. research object. As an important direction of cellulose research, nano-microcrystalline cellulose has attracted extensive attention from academia and industry for its special nano-sized structure and excellent pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
CPCD21H21/16
Inventor 唐艳军胡秀兰刘东东
Owner ZHEJIANG SCI-TECH UNIV
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