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A kind of flame-retardant paper based on nano-cellulose whisker and microcapsule and preparation method thereof

A technology of nanocellulose and microcapsules is applied in the field of flame retardant paper materials, which can solve the problems of inability to balance the flame retardant performance and the physical properties of paper after processing, and achieve the improvement of limiting oxygen index, flame retardant performance and film formation. Good performance, good for uniform dispersion

Inactive Publication Date: 2018-08-17
SUZHOU ANTEK INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above prior art that the flame retardant modification of plant fibers can be carried out by combining gel materials, nano-materials and chemical flame retardants to endow paper with flame retardant properties, but the flame retardant properties are difficult to correlate with paper physical properties and post-processing properties. The best of both worlds, so it is still necessary to find a good flame-retardant high-quality paper

Method used

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  • A kind of flame-retardant paper based on nano-cellulose whisker and microcapsule and preparation method thereof
  • A kind of flame-retardant paper based on nano-cellulose whisker and microcapsule and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] (1) According to the solid-liquid ratio of concentrated sulfuric acid and cellulose is 100ml:3g, disperse the cellulose in 40% concentrated sulfuric acid solution, heat and hydrolyze it at 60°C for 6h, wash it with water and centrifuge until it is neutral to obtain nanocellulose whiskers.

[0029] (2) Add 80-mesh sepiolite to 1mol / L hydrochloric acid solution, the solid-to-liquid ratio is 1:10, and treat it at 60°C for 5 hours to obtain acid-activated sepiolite. The mass ratio of diatomite to diatomite is 1:0.2:1.2, soak in 3mg / mL diatomite solution, stir evenly, add diatomite, heat and stir at 50°C for 30min, remove solvent, and dry Crush after curing to obtain flame retardant microcapsules.

[0030] (3) According to the mass ratio of nanocellulose whiskers, flame-retardant microcapsules, and magnesium aluminum hydrotalcite of 1.2:0.5:0.1, nanocellulose whiskers and flame-retardant microcapsules are fully mixed, and then added to softwood pulp and The hardwood pulp i...

Embodiment 2

[0033] (1) According to the solid-liquid ratio of concentrated sulfuric acid and cellulose being 100ml:5g, disperse the cellulose in 45% concentrated sulfuric acid solution, heat and hydrolyze it at 80°C for 8 hours, wash it with water and centrifuge until it is neutral, and obtain nanocellulose whiskers.

[0034] (2) Add 100-mesh sepiolite to 1mol / L hydrochloric acid solution, the solid-to-liquid ratio is 1:15, and treat at 60°C for 5 hours to obtain acid-activated sepiolite. The mass ratio of diatomite to diatomite is 1:0.3:1.5, soak in 3mg / mL diatomite solution, stir evenly, add diatomite, heat and stir at 50°C for 60min, remove solvent, and dry Crush after curing to obtain flame retardant microcapsules.

[0035] (3) According to the mass ratio of nanocellulose whiskers, flame-retardant microcapsules, and magnesium aluminum hydrotalcite of 1.2:0.6:0.2, nanocellulose whiskers and flame-retardant microcapsules are fully mixed, and then added to softwood pulp and The hardwoo...

Embodiment 3

[0038] (1) According to the solid-liquid ratio of concentrated sulfuric acid and cellulose is 100ml:4g, disperse the cellulose in 42% concentrated sulfuric acid solution, heat and hydrolyze it at 75°C for 7h, fully wash and centrifuge until neutral, and obtain nanocellulose whiskers.

[0039] (2) Add 90-mesh sepiolite to 1mol / L hydrochloric acid solution, the solid-to-liquid ratio is 1:13, and treat it at 60°C for 5 hours to obtain acid-activated sepiolite. The mass ratio of diatomite to diatomite is 1:0.25:1.4, soak in 3mg / mL diatomite solution, stir evenly, add diatomite, heat and stir at 50°C for 45min, remove solvent, and dry Crush after curing to obtain flame retardant microcapsules.

[0040] (3) According to the mass ratio of nanocellulose whiskers, flame retardant microcapsules and magnesium aluminum hydrotalcite being 1.2:0.55:0.15, the nanocellulose whiskers and flame retardant microcapsules are fully mixed, and then added to softwood pulp and The hardwood pulp is m...

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Abstract

The invention provides flame retardant paper based on nano cellulose whiskers and microcapsules and a preparation method of the flame retardant paper. Flame retardant components of the flame retardant paper are nano cellulose whiskers, flame retardant microcapsules and magnesium aluminum hydrotalcite. The preparation method comprises the following steps: dispersing cellulose into a concentrated sulfuric acid solution, heating, hydrolyzing, sufficiently washing, centrifuging until the solution is neutral, and obtaining nano cellulose whisker; performing acid activation for sepiolite, soaking the sepiolite in an antimonous oxide solution, uniformly stirring, adding diatomite, heating, stirring, removing a solvent, drying, curing, crushing, and obtaining the flame retardant microcapsules; sufficiently mixing the nano cellulose whiskers and the flame retardant microcapsules, adding into paper pulp formed by mixing softwood pulp and hardwood pulp according to a ratio of 1:1, stirring, finally adding the magnesium aluminum hydrotalcite to obtain flame retardant paper pulp; and making the flame retardant paper pulp on a paper molding device to form paper, and pressing and drying to obtain the flame retardant paper based on the nano cellulose whiskers and microcapsules. The flame retardant paper prepared by the invention maintains a complete cellulose network skeleton structure, is better in mechanical properties and intensity, gentle in combustion and good in smoke suppressing properties.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant paper materials, and in particular relates to a flame-retardant paper based on nano-cellulose whiskers and microcapsules and a preparation method thereof. Background technique [0002] As we all know, plant fiber is a flammable substance. Various plant fiber paper-based materials, including building materials such as wallpaper boards, indoor paper decoration materials such as wallpaper, and paper packaging materials such as cartons, are a type of flammable materials that cause fires. Plant fiber paper after flame-retardant treatment is generally more difficult. Ignite or ignite for a long time, can inhibit the spread of flames, and its heat release rate is also low. The ignited paper can be self-extinguished, or the flashing time can be prolonged, which provides better conditions for personnel evacuation and property rescue. much time. In a fire, the main cause of casualties is the inhal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H15/10D21H21/54D21H17/68D21H15/02D21H17/69D21H17/67D21H21/34D21C9/00B01J13/02
CPCB01J13/02D21C9/004D21H15/02D21H15/10D21H17/675D21H17/68D21H17/69D21H21/34D21H21/54
Inventor 包伟强
Owner SUZHOU ANTEK INDAL