A kind of preparation method of superhydrophobic, self-cleaning coating for papermaking

A self-cleaning, super-hydrophobic technology, applied in pigmented coatings, calcium carbonate/strontium/barium, etc., can solve the problems of high environmental protection costs, unfavorable industrial applications, etc., and achieve improved aging resistance, easy industrial production, and production processes concise effect

Active Publication Date: 2015-08-19
HUNAN HAOZHI TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] However, the current two-step method of constructing a rough surface structure first and then modifying the surface with fluorosilane has many difficulties, that is, it needs special advanced equipment (such as plasma equipment) or uses expensive polymer materials (such as surface low energy fluorosilane) dilemma, but also need to pay a lot of environmental costs, which is not conducive to its large-scale industrial application

Method used

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  • A kind of preparation method of superhydrophobic, self-cleaning coating for papermaking

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Embodiment 1

[0024] The technological process of the present embodiment is as follows:

[0025] ①. Slurry preparation: Take natural limestone with a calcium carbonate content of 97% and a magnesium carbonate content of 0.6%, crush and calcinate it into calcium oxide, add hot water at 50°C for digestion, pass through a 250-mesh sieve, and add water to prepare Refined calcium hydroxide slurry with a concentration of 120g / L, set aside; at the same time, take 9g of sodium hydroxide and add it to 120ml of 85°C hot water, then add 40g of stearic acid and 20g of palmitic acid to prepare a surface modifier aqueous solution, spare;

[0026] ②. Primary carbonization: put 10L of spare refined calcium hydroxide slurry into a 20L reaction tank, heat to 30°C, then add 30g of sodium citrate as crystal form control agent A, and then, pass in a volume of carbon dioxide The kiln gas with a concentration of 18% and a flow rate of 350L / min is used for a carbonization reaction, and the reaction temperature is...

Embodiment 2

[0033] The technological process of the present embodiment is as follows:

[0034] ①. Slurry preparation: Take natural limestone with a calcium carbonate content of 97% and a magnesium carbonate content of 0.6%, crush and calcinate it into calcium oxide, add hot water at 50°C for digestion, pass through a 250-mesh sieve, and add water to prepare Refined calcium hydroxide slurry with a concentration of 150g / L is set aside; at the same time, 10g of sodium hydroxide is added to 140ml of 85°C hot water, and then 70g of oleic acid is added to prepare an aqueous surface modifier solution, set aside;

[0035] ②. Primary carbonization: put 10L of spare refined calcium hydroxide slurry into a 20L reaction tank, heat to 35°C, then add 20g of sodium pyrophosphate as crystal form control agent A, and then, pass in a volume of carbon dioxide The kiln gas with a concentration of 18% and a flow rate of 300L / min is used for a carbonization reaction, and the reaction temperature is controlled ...

Embodiment 3

[0042] The technological process of the present embodiment is as follows:

[0043] ①. Slurry preparation: Take natural limestone with a calcium carbonate content of 97% and a magnesium carbonate content of 0.6%, crush and calcinate it into calcium oxide, add hot water at 50°C for digestion, pass through a 250-mesh sieve, and add water to prepare Refined calcium hydroxide slurry with a concentration of 150g / L is set aside; at the same time, 10g of sodium hydroxide is added to 140ml of 85°C hot water, and then 70g of lauric acid is added to prepare an aqueous solution of surface modifier, set aside;

[0044] ②. Primary carbonization: put 10L of spare refined calcium hydroxide slurry into a 20L reaction tank, heat to 35°C, then add 20g of sodium pyrophosphate as crystal form control agent A, and then, pass in a volume of carbon dioxide The kiln gas with a concentration of 18% and a flow rate of 400L / min is used for a carbonization reaction, and the reaction temperature is control...

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Abstract

The invention discloses a preparation method of a super-hydrophobic self-cleaning coating for papermaking and relates to the field of preparation technology of papermaking materials. The technological process comprises pulp preparation, primary carbonization, secondary carbonization, surface modification, filtering and emulsifying; the method has the characteristics that an operation process is simple, cost is low, industrial production is easy to realize and the like; the product has a super-hydrophobic self-cleaning function; as the topcoat coating of paper, the coating can be used for manufacturing the super-hydrophobic self-cleaning paper.

Description

Technical field: [0001] The invention relates to the technical field of papermaking materials preparation, in particular to a method for preparing superhydrophobic and self-cleaning coatings for papermaking. Background technique: [0002] With the needs of market development, people pay more and more attention to the pursuit of paper quality, performance and taste, which promotes the development of coated processed paper and coated paperboard in the paper industry. Normally, ordinary paper without surface treatment has strong hydrophilicity. Once in contact with water, water will quickly penetrate into the paper, resulting in a decrease in the mechanical properties of the paper and eventually losing its use value. Coated processed paper is mainly to apply various performance pigments, sizing materials and special coatings on the surface of the paper to meet the special performance requirements of the paper (such as surface strength, appearance color, wear resistance, waterpr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/38C01F11/18
Inventor 李振东巩强
Owner HUNAN HAOZHI TECH
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