Preparation method of high-transparency and high-barrier cellulose paper

A cellulose paper and cellulose technology, applied in special paper, paper, papermaking, etc., can solve the problems of unsuitable recycling of solvents, greenness, etc., and achieve the effects of reducing agglomeration, reducing production costs, and low aspect ratio

Inactive Publication Date: 2021-07-23
阿尔诺维根斯(衢州)特种纸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solvent in the process of preparing composite materials by this method is still unsuitable for recycling and is green.

Method used

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  • Preparation method of high-transparency and high-barrier cellulose paper
  • Preparation method of high-transparency and high-barrier cellulose paper
  • Preparation method of high-transparency and high-barrier cellulose paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.5 g of cellulose nanocrystal (CNC) solution and 0.5 g of cellulose nanofibril (CNF) solution in a dry mass, place them in a beaker, and ultrasonicate for 1 hour to disperse the CNC / CNF mixed solution. homogeneously, to obtain a mixed solution of all nanocellulose. After the filter membrane is placed in the sand core funnel, the uniformly mixed whole nanocellulose solution is poured into the sand core funnel, and suction filtered for 1.5 hours to a relatively dry state. Then the cellulose and filter membrane obtained by suction filtration were placed on a polytetrafluoroethylene plate, and placed in an oven, and dried at 35° C. for 3 hours. Finally, the water-based mixed filter membrane with a thickness of 0.45 μm and a diameter of 47 mm was peeled off to obtain a highly transparent and high-barrier cellulose paper.

Embodiment 2

[0027] Weigh the cellulose nanocrystal (CNC) solution with a dry weight of 0.1 g and the cellulose nanofibril (CNF) solution with a dry weight of 0.9 g, place them in a beaker, and ultrasonicate for 2 hours to disperse the CNC / CNF mixed solution homogeneously, to obtain a mixed solution of all nanocellulose. After the filter membrane is placed in the sand core funnel, the uniformly mixed whole nanocellulose solution is poured into the sand core funnel, and suction filtered for 6 hours to a relatively dry state. Then the cellulose paper and filter membrane obtained by suction filtration were placed on a polytetrafluoroethylene plate and placed in an oven for drying treatment at 50° C. for 1 h. Finally, the water-based mixed filter membrane with a thickness of 0.45 μm and a diameter of 47 mm was peeled off to obtain a highly transparent and high-barrier cellulose paper.

Embodiment 3

[0029] Weigh the cellulose nanocrystal (CNC) solution with a dry mass of 0.9 g and the cellulose nanofibril (CNF) solution with a dry mass of 0.1 g, place them in a beaker, and ultrasonicate for 0.5 h to make the CNC / CNF mixed solution Disperse evenly to obtain a mixed solution of all nanocellulose. After the filter membrane is placed in the sand core funnel, the uniformly mixed whole nanocellulose solution is poured into the sand core funnel, and suction filtered for 6 hours to a relatively dry state. Then the cellulose paper and filter membrane obtained by suction filtration were placed on a polytetrafluoroethylene plate, and placed in an oven for drying treatment at 15° C. for 8 hours. Finally, the water-based mixed filter membrane with a thickness of 0.45 μm and a diameter of 47 mm was peeled off to obtain a highly transparent and high-barrier cellulose paper.

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Abstract

The invention relates to the technical field of cellulose paper preparation, in particular to a preparation method of high-transparency and high-barrier cellulose paper. The method comprises the following steps: preparing cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) into a CNC/CNF mixed solution according to a certain proportion; then uniformly dispersing by ultrasonic waves, and carrying out suction filtration for 1.5-6 hours through a sand core funnel; and finally, drying in a drying oven at the temperature of 15-50 DEG C for 1-8 hours, and stripping the cellulose paper from a filter membrane. The raw materials are wide in source, the preparation process is simple, the production cost can be effectively saved, and the economic benefit is improved; and the raw materials are green, environment-friendly and biodegradable, and have a very good environmental effect. More importantly, the cellulose paper prepared by the method not only has better barrier property, but also has higher transparency, and has wide application prospects in the fields of biological composite films, packaging materials and the like.

Description

technical field [0001] The invention belongs to the technical field of cellulose paper preparation, and in particular relates to a preparation method of highly transparent and high barrier cellulose paper. Background technique [0002] Cellulose is a natural renewable resource with the widest distribution and largest reserves in nature. Cellulose has a wide range of sources, not only can be extracted from plants, such as: cotton, wood, grasses, etc., but also can be synthesized by microorganisms such as bacteria. Cellulose has excellent properties such as easy chemical modification, renewable degradation, and good biocompatibility, and is widely used in food, medical, chemical and other fields. However, cellulose also has some disadvantages, such as poor solubility, poor thermal stability, and no corrosion resistance, which limit its application in certain fields. With the development of nanotechnology, nano-scale cellulose materials can be obtained by physical mechanical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H25/04C08B15/02
CPCD21H27/00D21H25/04C08B15/02
Inventor 马家勇罗军张耀庭叶宝根张翔旭花艺文唐艳军
Owner 阿尔诺维根斯(衢州)特种纸有限公司
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