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Special low-cost graphene filler for high-grade coated paper and preparation method of special low-cost graphene filler

A technology of graphene and coated paper, applied in fibrous fillers, chemical instruments and methods, inorganic pigment treatment, etc., can solve problems such as complicated process, decreased paper material retention rate, decreased strength of coated paper, etc., and achieve simple and easy process row, tensile strength and bursting strength enhancement, retention rate improvement effect

Active Publication Date: 2018-02-09
JIANGXI QIANYAN TECH CONSULTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a special low-cost graphene filler for high-grade coated paper and its preparation method, which can solve the problems of traditional fillers that reduce the strength of coated paper, reduce the effect of paper sizing, and reduce the retention rate of paper materials. At the same time, the process is relatively complicated. and other defects

Method used

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  • Special low-cost graphene filler for high-grade coated paper and preparation method of special low-cost graphene filler

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Embodiment 1

[0035] A special low-cost graphene filler for high-grade coated paper and a preparation method thereof, the specific process of preparing the graphene filler is as follows:

[0036] Mix 10kg of natural potato starch with 10kg of N,N-dimethyl sulfoxide, heat to 140°C, stir at a speed of 180r / min for 4h to completely dissolve the starch, add sodium hydroxide to adjust the pH to 9.5~10.5. Add 0.025kg epichlorohydrin then, react 5h under stirring state, then add sodium hydroxide and adjust pH value to 8 ~ 9, obtain the potato starch of cross-linking modification; Add 0.5kg acetic anhydride in the cross-linking starch of gained, After reacting for 50 minutes, adjust the pH value to 6~6.5, filter, dehydrate, wash, and then dry in an oven at 45°C for 40 minutes to obtain esterified modified potato starch; 15kg modified potato starch, 80kg graphene , 5kg of sodium stearate, mixed with water, added to a homogenizer to disperse, freeze-gelled, and dried to obtain a special graphene fill...

Embodiment 2

[0039] A special low-cost graphene filler for high-grade coated paper and a preparation method thereof, the specific process of preparing the graphene filler is as follows:

[0040] Mix 10kg of natural potato starch with 10kg of N,N-dimethylacetamide, heat to 140°C, stir at a speed of 200r / min for 3h to completely dissolve the starch, add sodium hydroxide, and adjust the pH to 9.5~10.5. Then add 0.025kg epichlorohydrin, react 4h under stirring state, then add sodium hydroxide to adjust the pH value to 8~9, obtain the potato starch of cross-linking modification; Add 0.4kg acetic anhydride in the cross-linking starch of gained, After reacting for 60 minutes, adjust the pH value to 6~6.5, filter, dehydrate, wash, and then dry in an oven at 35°C for 30 minutes to obtain esterified modified potato starch; 20kg modified potato starch, 77kg graphene , 3kg of sodium stearate, mixed with water, added to a rotary homogenizer to disperse, freeze-gelled, and dried to obtain a special grap...

Embodiment 3

[0043] A special low-cost graphene filler for high-grade coated paper and a preparation method thereof, the specific process of preparing the graphene filler is as follows:

[0044] Mix 10kg of natural potato starch with 10kg of N,N-dimethyl sulfoxide, heat to 120°C, stir at a speed of 160r / min for 3 hours to completely dissolve the starch, add sodium hydroxide, and adjust the pH value to 9.5~10.5. Add 0.03kg epichlorohydrin then, react 5h under stirring state, then add sodium hydroxide to adjust pH value to 8 ~ 9, obtain the potato starch of cross-linking modification; Add 0.6kg acetic anhydride in the cross-linking starch of gained, After reacting for 55 minutes, adjust the pH value to 6~6.5, filter, dehydrate, wash, and then dry in an oven at 45°C for 45 minutes to obtain esterified modified potato starch; 22kg modified potato starch, 75kg graphene , 3kg of sodium stearate, mixed with water, added to a plunger type homogenizer to disperse, freeze-gelled, and dried to obtain...

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Abstract

The invention belongs to the technical field of graphene filler preparation and provides a special low-cost graphene filler for high-grade coated paper and a preparation method of the special low-costgraphene filler. The method comprises the steps: carrying out crosslinking and esterification to prepare modified starch; and then, carrying out homogenization and freezing gelatinization modification on graphene by using the modified starch to prepare the special graphene filler for the high-grade coated paper, so that as to greatly reduce the cost of the graphene is greatly reduced. Compared with the a traditional method, the graphene-filled coated paper prepared by using the method is relatively high in tensile strength and bursting strength, capable of effectively increasing the retentionrate of a coated paper material and relatively good in paper sheet gluing effect as well as uniformity, printing adaptability and shape stability; and meanwhile, the method is simple and easy and iscapable of realizing industrial production.

Description

technical field [0001] The invention belongs to the technical field of novel paper, and provides a special low-cost graphene filler for high-grade coated paper and a preparation method thereof. Background technique [0002] The paper industry is an industry closely related to the national economy, and its development level directly reflects the level of economic development in a region or country. In recent years, my country's paper industry has gradually entered a mature stage, and there are currently more than 6,000 paper companies. As a high-grade printing paper, coated paper has uniform and tight paper quality, high whiteness (above 85%), smooth paper surface, high gloss, and firm and consistent coating, which is convenient for obtaining exquisite and clear patterns and characters after printing. , mainly used for printing covers and illustrations of high-end books and periodicals, color pictures, various exquisite product advertisements, samples, product packaging, tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/63C08B31/04C08B31/10C09C1/46C09C3/10C09C3/08
CPCC08B31/04C08B31/10C09C1/46C09C3/006D21H17/63
Inventor 陈庆司文彬
Owner JIANGXI QIANYAN TECH CONSULTING CO LTD