Preparation method for cation nanocrystalline cellulose enhanced 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 the problems affecting the rheological properties of emulsion, sizing properties, adsorption and agglomeration, etc., and achieve the effects of potential application value, cost control reduction, and environmental friendliness
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Embodiment 1
[0025] Based on edible starch, pipette amylase in an amount of 150-200ppm, add it to a certain amount of distilled water, slowly add edible starch at a stirring speed of 700-800rpm to make it completely dispersed, and put Place it in a water bath at 80oC, stir and gelatinize for 25 minutes; finally, heat it in an oil bath at 130oC for 3 minutes to inactivate the enzyme; keep warm at 60oC and pipette cations according to the amount of 5% (based on edible starch) Styrene-acrylic emulsion, uniformly dispersed at a stirring speed of 400rpm for 30min.
[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 60oC water bath to keep warm, and stirred continuously to disperse evenly and set a...
Embodiment 2
[0029] Based on edible starch, pipette amylase in an amount of 150-200ppm, add it to a certain amount of distilled water, slowly add edible starch at a stirring speed of 700-800rpm to make it completely dispersed, and put Place it in a water bath at 80oC, stir and gelatinize for 25 minutes; finally, heat it in an oil bath at 130oC for 3 minutes to inactivate the enzyme; keep warm at 60oC and pipette cations according to the amount of 5% (based on edible starch) Styrene-acrylic emulsion, uniformly dispersed at a stirring speed of 400rpm for 30min.
[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 the sample in a 60o...
Embodiment 3
[0033] Based on edible starch, pipette amylase according to the amount of 150~200ppm, and add it to a certain amount of distilled water, slowly add edible starch at a stirring speed of 700~800rpm to make it completely dispersed, and put Place it in a water bath at 80oC, stir and gelatinize for 25min; finally, heat it in an oil bath at 130oC for 3min to inactivate the enzyme; keep it warm at 60oC and pipette cations according to the amount of 5% (based on edible starch) Styrene-acrylic emulsion, uniformly dispersed at a stirring speed of 400rpm for 30min.
[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; finally, put...
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