Method for manufacturing nanofiber transparent paper from straw

A nanofiber and transparent paper technology, applied in the field of paper manufacturing, can solve the problems of enhanced electrostatic repulsion of nanocellulose and restrictions on the application of transparent paper, and achieve the effects of excellent mechanical strength, high transparency, and enhanced light transmission

Inactive Publication Date: 2016-05-11
梅庆波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: the yield of nanocellulose prepared by acid hydrolyzing wood fiber is only 30-50%, and due to the high crystallinity and rod-like structure of nanocellulose, the prepared transparent paper is relatively brittle , which limits its application in the preparation of transparent paper, provides a method for preparing nanofiber transparent paper using straw. The present invention uses 1,3-dihydroxyacetone oxidation system to oxidize the fiber, so that the nanofiber between The enhanced electrostatic repulsion is conducive to the complete separation of cellulose from the cell wall, so that the transparent paper has higher transparency and excellent mechanical strength. Sodium hypochlorite can be used as an oxidant, and it also has a bleaching effect due to its strong oxidative properties. Can react with a small part of lignin remaining in the fibrils, remove lignin, enhance light transmission, rich source of raw materials, transparent paper is biodegradable and low in price

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, accurately weigh 80g of cotton stalks and 100g of reed stalks, put the stalks in the sun for 3 days, dry them and add them to a cutting machine to cut them into 2cm-long straw sections, and cut the straw sections according to the solid-liquid ratio of 1:4 Soak in water, and add sulfuric acid with a total mass of 5% and a mass fraction of 60% to the water, soak for 40min, and then filter and take out the straw; take 80g of the treated straw section in a 5L reactor, and add 2L of 3% sulfuric acid to the kettle Sodium chlorate, mix and stir to make the straw wet, then dropwise add hydrochloric acid solution with a mass fraction of 15% to it, adjust the pH value to 4.5, then raise the temperature to 60°C, keep the reaction at this temperature for 60 minutes, and stir the reaction every 15 minutes 2min, after the reaction, the product was taken out and added to a Buchner funnel for suction filtration, and the filter residue was washed twice with distilled water to obta...

example 2

[0020]First, accurately weigh 90g of cotton stalks and 160g of reed stalks, put the stalks in the sun for 4 days, dry them and add them to a cutting machine to cut them into 3cm-long straw sections, and cut the straw sections at a solid-to-liquid ratio of 1:4 Soak in water, and add sulfuric acid with a total mass of 6% and a mass fraction of 65% to the water, soak for 45min, and then filter and take out the straw; take 90g of the treated straw section in a 5L reactor, and add 2.5L of 3% sulfuric acid to the kettle Sodium chlorite, mix and stir to make the straw wet, then dropwise add a hydrochloric acid solution with a mass fraction of 15% to it, adjust the pH value to 5, then raise the temperature to 70°C, and keep the reaction at this temperature for 70 minutes, and the reaction will be carried out every 15 minutes Stir for 3 minutes, after the reaction is over, take out the product and add it to a Buchner funnel for suction filtration, wash the filter residue 3 times with di...

example 3

[0024] First, accurately weigh 100g of cotton stalks and 180g of reed stalks, put the stalks in the sun for 5 days, dry them and add them to a cutting machine to cut them into 4cm-long straw sections, and cut the straw sections at a solid-to-liquid ratio of 1:4 Soak in water, add sulfuric acid with a total mass of 7% and a mass fraction of 70% to the water, soak for 50min, and then filter and take out the straw; take 100g of the treated straw section in a 5L reactor, add 3L of 3% sulfuric acid to the kettle Sodium chlorate, mix and stir to make the straw wet, then dropwise add a hydrochloric acid solution with a mass fraction of 15% to it, adjust the pH value to 5.5, then raise the temperature to 80°C, keep the reaction at this temperature for 80 minutes, and stir the reaction every 15 minutes 4min, after the reaction is over, take out the product and add it to a Buchner funnel for suction filtration, wash the filter residue 4 times with distilled water to obtain cellulose; tak...

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Abstract

The invention discloses a method for manufacturing nanofiber transparent paper from straw, belonging to the field of papermaking. According to the invention, with adoption of oxidized fiber of a 1,3-dihydroxyacetone oxidization system, the electrostatic repulsive force among nano-cellulose is enhanced, so that the cellulose can be separated from cell walls completely, and the transparent paper has higher transparency and excellent mechanical strength. Sodium hypochlorite can be used as an oxidizing agent, has a bleaching function due to strong oxidizing property, and can react with little lignin left in original fiber to remove the lignin so as to improve light transmission. The raw materials are readily available, and the transparent paper is biologically degradable and cheap.

Description

technical field [0001] The invention discloses a method for preparing nanofiber transparent paper by using straw, which belongs to the field of paper manufacturing. Background technique [0002] Fibers can generally be divided into two types: micron-scale fibers and nano-scale fibers. Micron-scale fibers are often used in traditional papermaking. Depending on the source of raw materials and the type of trees, the fiber diameter is generally in the range of 20 to 50 microns; nanofibers are divided into nano-microcrystalline cellulose and nano-fibrils according to different preparation methods and fiber shapes. cellulose. Micron fiber is a kind of slender, hollow cell. The lignin between the cells is removed from the wood by high temperature and high pressure cooking, and then the remaining lignin and hemicellulose in the fiber are removed as much as possible by bleaching. More removal to obtain high-purity cellulose fibers. Nanocrystalline cellulose is a rod-shaped, highly...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H11/12D21C3/18D21C9/14D21B1/30D21F13/00
CPCD21H15/10D21B1/303D21C3/18D21C9/14D21F13/00D21H11/12
Inventor 梅庆波王志慧
Owner 梅庆波
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