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Water-proof paper prepared from nanometer-thick thin fiber layer in sodium alginate and preparation method

A sodium alginate, nano-level technology, applied in special paper, paper, papermaking and other directions, can solve problems such as reducing chemical treatment process, and achieve the effect of eliminating sizing process, reducing use and good hydrophobic effect

Inactive Publication Date: 2019-09-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reduced chemical handling of sizing agents during recycling

Method used

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  • Water-proof paper prepared from nanometer-thick thin fiber layer in sodium alginate and preparation method
  • Water-proof paper prepared from nanometer-thick thin fiber layer in sodium alginate and preparation method
  • Water-proof paper prepared from nanometer-thick thin fiber layer in sodium alginate and preparation method

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preparation example Construction

[0028] Preparation method concrete operation of the present invention is as follows:

[0029] First prepare the aqueous solution of sodium alginate or its derivatives with a concentration of 0.5-2%; after the configuration is completed, let it stand for swelling for later use; pour the obtained solution into the mold, transfer it to a cold trap, cool down to -50~-30°C and keep the temperature constant After 4 to 6 hours of treatment, transfer to a freeze dryer, adjust the pressure in the freeze dryer to 5-10 Pa, and last for 20 to 26 hours to ensure complete drying to obtain a thin layer of porous sponge.

[0030] With the aid of a 100-200 mesh porous sieve, evenly distribute the hydrophobic fumed silica of the water-resistant enhancer on the surface and internal voids of the sponge body of sodium alginate or its derivatives to ensure the mass ratio of the sponge body to the silicon of the water-resistant enhancer The ratio is 100:(5-40), and a sodium alginate sponge body fill...

Embodiment 1

[0034] First prepare sodium alginate or its derivatives solution with a concentration of 1.0%; after the configuration is completed, let it stand and swell for later use; pour the resulting solution into the mold and transfer it to a cold trap, cool it down to -40°C and keep it at a constant temperature before transferring it to a freezer In the dryer, ensure complete drying to obtain a thin layer of porous sponge. With the help of a porous sieve, evenly distribute the water-resistant enhancer hydrophobic fumed silica on the surface and internal voids of sodium alginate or its derivative sponge to ensure that sodium alginate and water-resistant enhancer hydrophobic fumed silica The mass ratio is 100:20, and the sodium alginate sponge body filled with fumed silica is obtained. The prepared fumed silica-filled sodium alginate sponge was pressed at a temperature of 105°C and a pressure of 30 MPa to obtain a waterproof paper prepared by using a thin layer of nano-scale fibers in s...

Embodiment 2

[0037] First prepare sodium alginate or its derivatives solution with a concentration of 0.5%; after the configuration is completed, let it stand and swell for later use; pour the resulting solution into a mold and transfer it to a cold trap, cool it down to -40°C and keep it at a constant temperature before transferring it to a freezer In the dryer, ensure complete drying to obtain a thin layer of porous sponge. With the help of a porous sieve, evenly distribute the water-resistant enhancer hydrophobic fumed silica on the surface and internal voids of sodium alginate or its derivative sponge to ensure that sodium alginate and water-resistant enhancer hydrophobic fumed silica The mass ratio is 100:15, and the sodium alginate sponge body filled with fumed silica is obtained. The prepared fumed silica-filled sodium alginate sponge was pressed at a temperature of 105°C and a pressure of 30 MPa to obtain a waterproof paper prepared by using a thin layer of nano-scale fibers in sod...

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Abstract

The invention discloses water-proof paper prepared from a nanometer-thick thin fiber layer in sodium alginate and a preparation method. The specialty paper is composed of the nanometer-thick thin fiber layer in the sodium alginate and a water-resistant reinforcing agent, wherein the thin fiber layer is from a sodium alginate derivative, and the mass ratio of the thin fiber layer to the water-resistant reinforcing agent is 100:(5-40). A thin layer material obtained after the sodium alginate of the sodium alginate derivative is dissolved in water is freeze-dried, then, the water-resistant reinforcing agent is filled with the freeze-dried thin layer material, and finally, by drying and pressing, the water-proof paper prepared from the nanometer thin fiber layer in the sodium alginate is obtained. Compared with conventional paper, the sizing process is omitted, and the using amount of a chemical product is reduced. During recycling, the chemical treatment process for a sizing agent is omitted. When the paper as garbage is wasted, degradation is more facilitated. The hydrophobic effect is generated independent on a complicated chemical reaction, and the principle is simple and smart.

Description

technical field [0001] The invention belongs to the field of special paper preparation, in particular to a waterproof paper and a preparation method prepared by using a thin layer of nanoscale thick fibers in sodium alginate. Background technique [0002] While the paper industry is giving full play to its basic service role in the national economy, its own pollution problems have also aroused people's attention. The pollution of wastes discharged in the process of pulping and papermaking is very serious, and the types of pollutants are various, which brings serious challenges to the treatment. With the application of a large number of treatment science and technology, the pollution problem of pulp and papermaking has been alleviated. But in the long run, the current stage is in the research of governance science and technology. However, there are very few studies on the materials and processes of non-polluting paper. Contents of the invention [0003] The purpose of th...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21F5/00D21F13/00
CPCD21F5/00D21F13/00D21H27/00
Inventor 杨晓武李志刚王晨
Owner SHAANXI UNIV OF SCI & TECH