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Nanocellulose-reinforced biomass coated oil-proof paper and production technology thereof

A technology of nano-cellulose and oil-proof paper, which is applied in the direction of lamination, layered products, lamination devices, etc., can solve the problems of limited improvement of paper oil-proof performance, reduction of fiber surface energy, environmental problems, etc., to achieve flexible production, Lightweight and good formability

Inactive Publication Date: 2018-10-23
郄冰玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the former has limited improvement in the oil-proof performance of paper, while the latter uses refractory materials, which can cause environmental problems
The application of fluorocarbon surfactants can reduce the surface energy of the fiber surface, so that the oil cannot wet the fiber and achieve the oil-repellent effect, but the addition of perfluoroalkyl compounds alone is not only costly, but also contains toxic monomers inside the molecule , there is a certain adverse effect on the application of the packaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for preparing nano-cellulose-enhanced biomass-coated oil-proof paper is as follows.

[0019] (1) The degreasing cotton nanocellulose was prepared by chemical pretreatment combined with ultrasonic crushing.

[0020] (2) Preparation of nanocellulose: Weigh 5 g of pulverized absorbent cotton, place it in 500 mL of a mixed solution containing 1 wt% acetic acid and 1.2 wt % sodium chlorite, and stir it in a constant temperature water bath at 75° C. for 1 h to remove lignin; After suction filtration and rinsing, add 500mL of 2wt% KOH solution to the lignin-removed absorbent cotton, and stir in a constant temperature water bath at 85°C for 2 hours to remove hemicellulose; Acid hydrolyze with 10wt% H2SO4 and 10wt% HCl mixed acid at 80°C for 2h, centrifuge and wash to neutral, then sonicate at 600W for 45min to obtain nanocellulose suspension, which is refrigerated for later use.

[0021] (3) Pre-formation of composite oil-repellent film: The mass ratio of potato sta...

Embodiment 2

[0024] The method for preparing nano-cellulose-enhanced biomass-coated oil-proof paper is as follows.

[0025] (1) Peanut shell nanocellulose was prepared by chemical pretreatment combined with sulfuric acid hydrolysis.

[0026](2) The preparation process of peanut shell cellulose. Wash the peanut shells with deionized water to remove silt and impurities, and put them in a blast drying oven to dry to remove moisture. Put the dried peanut shells into a high-speed pulverizer for pulverization for 1 minute, and put the pulverized powder into a 60-mesh sieve for sieving. The sieved peanut shell powder was placed in 2% sodium hydroxide solution at a ratio of 1:20 g / ml to liquid, and reacted in a constant temperature water bath at 80° C. with a magnetic stirrer for 4 hours to remove hemicellulose. The peanut shell powder treated with lye is filtered to remove the solution, and the precipitated substance is obtained and dried in the air. The precipitated substance obtained by dryi...

Embodiment 3

[0031] The method for preparing nano-cellulose-enhanced biomass-coated oil-proof paper is as follows.

[0032] (1) The degreasing cotton nanocellulose was prepared by TEMPO catalytic oxidation combined with ultrasonic crushing.

[0033] (2) Mercerizing process of absorbent cotton. Weigh 5g of pulverized absorbent cotton, place it in 500mL of a mixed solution containing 1wt% acetic acid and 1.2wt% sodium chlorite, and stir it in a constant temperature water bath at 75°C for 1 hour to remove lignin; Add 500mL of 2wt% KOH solution to plain absorbent cotton, and stir in a constant temperature water bath at 85°C for 2h to remove hemicellulose.

[0034] (3) TEMPO catalytic oxidation and ultrasonic crushing process. Buffer solution preparation: The molar ratio of Na2CO3 to NaHCO3 is 7:3, and the total concentration is fixed at 0.1mol / L to maintain a relatively stable pH value of the reaction system; 0.1g TEMPO and 1.0g NaBr are dissolved in 500ml of the above buffer solution; 5g o...

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Abstract

The invention discloses a biomass coated oil-proof paper prepared by gluing a nanocellulose-reinforced alginate / starch-based composite oil-proof film and a paper substrate, and a production technologythereof. The production technology comprises the following steps: preparing nanocellulose by chemical pretreatment, acid hydrolysis, TEMPO catalytic oxidation, ultrasonic treatment, mechanical crushing or a combination thereof; producing the composite oil-proof film by using starch and sodium alginate as an oil-proof film forming substrate, glycerin as a plasticizer and nanocellulose as a reinforcing component; and casting the composite oil-proof film material to form the film, and bonding the film and the paper substrate to produce the biomass coated oil-proof paper. The nanocellulose, alginate and starch have good compatibility when compounded, and the addition of the nanocellulose makes the alginate and starch closely cross-linked, so the strength, the oil resistance and the thermal stability of the alginate / starch-based composite oil-proof film are effectively improved. The biomass coated oil-proof paper produced by casting film formation and bonding has a smooth surface, can be firmly combined, has no crease phenomenon, has no delamination, and can be naturally degraded.

Description

technical field [0001] The present invention relates to the technical field of preparation and application of nano-cellulose, biomass composite film and film-coated oil-proof paper, in particular to a kind of alginate / starch-based composite oil-proof film reinforced by nano-cellulose bonded to paper substrate The prepared biomass-coated oil-proof paper and its preparation process. Background technique [0002] Nanofibril-like regions in plant fibers can be separated from each other by highly corrosive chemical reagents, specific enzymes, or severe mechanical forces to overcome the large number of hydrogen bonds crossed between the fibrils, resulting in nanocellulose. Nanocellulose has many excellent properties, such as reproducibility, high crystallinity, extremely high strength and modulus, large specific surface area, and highly active surface for grafting specific groups. When nanocellulose is added into the composite material as a reinforcing agent, the interface area b...

Claims

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Application Information

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IPC IPC(8): B32B37/10C08L3/02C08L5/04C08L1/02C08K5/053C08J5/18
CPCB32B37/10C08J5/18C08J2303/02C08L3/02C08L2201/06C08L2201/08C08L2203/16C08L2205/03C08L5/04C08L1/02C08K5/053
Inventor 唐亚丽郄冰玉卢立新
Owner 郄冰玉
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