Preparation method of shell nacreous layer laminated materials applied to marine heavy-duty coating instead of glass flakes

A glass flake and lamellar material technology, applied in antifouling/underwater coatings, biocide-containing paints, etc. High value-added utilization, excellent natural lipophilicity and hydrophobicity, low equipment investment and energy consumption

Inactive Publication Date: 2014-02-12
OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Used in heavy-duty anti-corrosion coatings, its construction, impermeab

Method used

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  • Preparation method of shell nacreous layer laminated materials applied to marine heavy-duty coating instead of glass flakes
  • Preparation method of shell nacreous layer laminated materials applied to marine heavy-duty coating instead of glass flakes
  • Preparation method of shell nacreous layer laminated materials applied to marine heavy-duty coating instead of glass flakes

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preparation example Construction

[0027] The steps of the preparation method of the shell nacre layer material used for marine heavy-duty anti-corrosion coatings instead of glass flakes are as follows:

[0028] 1) After washing the shells with water to remove the residue, soak them in 0.05-0.75 mol / L sodium hydroxide solution, potassium hydroxide solution or dilute sodium hypochlorite solution for 5-120 minutes at 25-100 °C, and then wash to remove the cuticle;

[0029] 2) Soak the cuticle-removed sample in 0.3-5 mol / L sodium hydroxide solution or potassium hydroxide solution for 30-180 minutes at 50-200 °C, wash with water to remove the prism layer, and obtain the shell nacre, and Shell nacre is crushed to 100~400 mesh;

[0030] 3) Mix the pulverized shell nacre with water and a grinding aid, and stir at a high speed to prepare a slurry. The quality of the shell nacre is 10% to 50% of the water mass, and the mass of the grinding aid is 0.25% to 5% of the mass of shell nacre;

[0031] 4) Using zirc...

Embodiment 1

[0040] 1) After washing the mussel shells with water to remove the residue, soak them in 0.75 mol / L sodium hydroxide solution for 120 minutes at 25 °C, and wash with water to remove the cuticle;

[0041] 2) Soak the cuticle-removed sample in 5 mol / L sodium hydroxide solution at 50 °C for 180 minutes, wash with water to remove the prism layer, and obtain the shell nacre, and crush the shell nacre to 100 mesh by conventional crushing methods ;

[0042] 3) Mix the pulverized shell nacre with water and grinding aid, and stir at a high speed to obtain a slurry. The quality of the shell nacre is 10% of the water quality, and the quality of the grinding aid polyacrylic acid is 0.25% of the shell nacre quality. %;

[0043] 4) Using zirconia balls as the grinding and peeling medium, put the grinding and peeling media with particle sizes of 0.5 mm, 1.5 mm, and 2.5 mm into the grinding and peeling barrel according to the mass ratio of 3:2:1. The mass ratio of nacre is 0.5:1, ad...

Embodiment 2

[0047] 1) After washing the abalone shells with water to remove the residues, soak them in 0.05 mol / L sodium hydroxide solution at 100°C for 100 minutes, and wash with water to remove the cuticle;

[0048] 2) Soak the cuticle-removed sample in 0.3 mol / L sodium hydroxide solution at 200 °C for 30 minutes, wash with water to remove the prism layer, and obtain the shell nacre, and crush the shell nacre to 400 mesh by conventional crushing methods ;

[0049] 3) Mix the pulverized shell nacre with water and a grinding aid, and stir at a high speed to obtain a slurry. The quality of the shell nacre is 50% of the water quality, and the quality of the grinding aid sodium silicate is 50% of the quality of the shell nacre. 5%;

[0050] 4) Using alumina balls as the grinding and peeling medium, put the grinding and peeling media with particle sizes of 1 mm, 2 mm, and 3 mm into the grinding and peeling barrel according to the mass ratio of 3:2:1. The mass ratio of nacre is 5:1, ...

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Abstract

The invention discloses a preparation method of shell nacreous layer laminated materials applied to a marine heavy-duty coating instead of glass flakes. The preparation method comprises the following steps: washing shells to remove residues, soaking the shells in a sodium hydroxide solution, a potassium hydroxide solution or a dilute sodium hypochlorite solution and washing the shells to remove stratum corneum; soaking the samples without the stratum corneum in a sodium hydroxide solution or a potassium hydroxide solution and washing the samples to remove prismatic layers, thus obtaining nacreous layers of the shells; mixing the ground nacreous layers of the shells with water and grinding aids and stirring the mixture at high speed to prepare pulp; grinding the pulp in a grinding and stripping barrel and then performing dehydration, washing and re-dehydration to obtain filter cakes; adding water to the washed filter cakes to prepare pulp and adding surfactants in the stirring process; drying surface modified shell nacreous layer laminated materials and then breaking the dried surface modified shell nacreous layer laminated materials apart, thus obtaining the finished products. The shell nacreous layer laminated materials have natural oleophylic hydrophobicity and excellent mechanical properties, can be uniformly distributed in matrix resin of the heavy-duty coating and have good compatibility with the matrix resins.

Description

technical field [0001] The invention relates to the field of utilization of shell nacre, in particular to a method for preparing a seashell nacre sheet material that replaces glass flakes and is used for marine heavy-duty anti-corrosion coatings. Background technique [0002] Glass flakes have been widely used in heavy-duty coatings due to their excellent chemical stability and corrosion resistance, but there are still some shortcomings. The surface treatment of glass flakes is weak and the cost of modification is high. The surface coupling treatment technology and process cost are relatively high. Used in heavy-duty anti-corrosion coatings, its construction, impermeability, anti-settling properties, and alignment orientation are not ideal. [0003] Shell nacre sheet material is a biomineral material formed by biomineralization, calcium carbonate accounts for about 95% of its chemical composition, and the remaining about 5% is organic matrix. The formation of shell nacre ...

Claims

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Application Information

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IPC IPC(8): C09D5/16
Inventor 李海晏夏枚生邵庆均叶瑛肖金星陈涛
Owner OCEAN RES CENT OF ZHOUSHAN ZHEJIANG UNIV
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