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Preparation method for lignin/resin superhydrophobic insulating and corrosion-resistant coating

A super-hydrophobic and corrosion-resistant technology, used in lignin coatings, epoxy resin coatings, anti-corrosion coatings, etc., can solve the problems of wasting resources and polluting the environment

Active Publication Date: 2019-09-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lignin reserves are huge, if not fully utilized, it will not only waste resources, but also pollute the environment

Method used

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  • Preparation method for lignin/resin superhydrophobic insulating and corrosion-resistant coating
  • Preparation method for lignin/resin superhydrophobic insulating and corrosion-resistant coating
  • Preparation method for lignin/resin superhydrophobic insulating and corrosion-resistant coating

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preparation example Construction

[0032] The invention provides a preparation method of a lignin / resin superhydrophobic insulating corrosion-resistant coating:

[0033] Dissolving alkali lignin in a polar solvent,

[0034] Slowly add the initiator to the obtained alkali lignin solution, heat at 90-180°C under the protection of nitrogen, slowly add long-chain alkane methoxysilane, and obtain a modified alkali lignin solution after the reaction. The modified alkali lignin solution Precipitate and purify, precipitate alkali lignin modified products, dry for later use,

[0035] The modified alkali lignin is added to the hydrophobic resin solution, stirred, and a curing agent is added to obtain the nano lignin fluorine-free super-hydrophobic coating.

[0036] The invention also relates to a lignin / resin superhydrophobic insulating and corrosion-resistant coating prepared by the preparation method.

[0037] The present invention also relates to the application of the lignin / resin superhydrophobic insulating corros...

Embodiment 1

[0042] a. dissolving polysulfone resin in dichloromethane to make a polysulfone resin solution with a mass fraction of 10%;

[0043] b. dissolving alkali lignin in DMF to make a mass fraction of 8% alkali lignin solution, dissolving sodium methylate in ethanol to make a mass fraction of 1% sodium methylate solution, alkali lignin solution and sodium methylate solution The mixture was mixed slowly, heated to 110°C under the protection of nitrogen, and then slowly added dodecyltrimethoxysilane with a mass fraction of 2%, and the reaction was stirred for 4 hours to form a stable modified alkali lignin solution; Precipitate the modified alkali lignin to obtain the modified alkali lignin and dry it for later use;

[0044] c. Dissolve the modified alkali lignin in DMF to make an alkali lignin modified solution with a mass fraction of 20%, mix the polysulfone resin treated in a with it, stir at room temperature for 1 hour, and then add water-based isocyanate, The mass fraction was 5...

Embodiment 2

[0047] a. get the polyurethane resin and dissolve it in thinner water to make a 50% polyurethane resin solution by mass fraction;

[0048] b. dissolving alkali lignin in DMF to make a mass fraction of 10% alkali lignin solution, dissolving sodium methylate in ethanol to make a mass fraction of 2% sodium methylate solution, alkali lignin solution and sodium methylate solution Mix them slowly, heat to 90°C under the protection of nitrogen, then slowly add tetradecyltrimethoxysilane with a mass fraction of 5.5%, and react with stirring for 5 hours to form a stable modified alkali lignin solution; use ethanol to Precipitate the modified alkali lignin to obtain the modified alkali lignin and dry it for later use;

[0049] c. Dissolve the modified alkali lignin in DMF to make an alkali lignin modified solution with a mass fraction of 25%, mix the polyurethane resin treated in a with it, stir at room temperature for 1.5h, and then add water-based isocyanate, The mass fraction was 4%, ...

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Abstract

The invention discloses a preparation method for a lignin / resin superhydrophobic insulating and corrosion-resistant coating, and relates to the technical fields of coatings and polymer functional materials. The preparation method comprises the following steps: dissolving alkali lignin into a polar solvent, slowly adding an obtained alkali lignin solution into an initiator, carrying out heating to 90 to 180 DEG C under the protection of nitrogen gas, slowly adding long-chain alkane methoxysilane, carrying out a reaction so as to obtain a modified alkali lignin solution, subjecting the modified alkali lignin solution to precipitation for extraction so as to obtain modified lignin, adding the modified lignin into hydrophobic resin, adding a curing agent under stirring so as to obtain a lignin and resin composite coating, and spraying the obtained coating onto the surface of a wood material, ceramic or metal so as to form a film layer with superhydrophobic surface. The superhydrophobic coating film layer provided by the invention has strong hydrophobicity, corrosion resistance and insulation. The coating provided by the invention has cheap and extensively-available raw materials, belongs to circulation comprehensive application of biomass raw materials, and has good application prospect and economic benefit.

Description

technical field [0001] The invention discloses a preparation method of a lignin / resin superhydrophobic insulating corrosion-resistant coating, and relates to the technical field of coatings and polymer functional materials. Background technique [0002] Lignin is a natural resource second only to cellulose and chitin in nature, and is one of the three major components of plant cell walls. Lignin exists not only in wood raw materials, but also in grass materials such as wheat straw and reed, and is one of the important components for plants to keep upright and rot. In the pulp and paper industry, lignin is the main impurity remaining after the separation of cellulose from plant fiber raw materials. Lignin reserves are huge, if not fully utilized, it will not only waste resources, but also pollute the environment. The invention provides a preparation method of a lignin / resin superhydrophobic insulating and corrosion-resistant coating. The superhydrophobic coating is formed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D181/06C09D183/04C09D163/00C09D5/08C09D5/25C08H7/00
CPCC09D197/005C09D181/06C09D183/04C09D163/00C09D5/08C08H6/00C08L2201/08C08L2205/03C08L97/005C08L81/06C08L83/04C08L63/00
Inventor 王守娟孙浩东孔凡功
Owner QILU UNIV OF TECH
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