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A modified cellulose nanofibril solution and its modified water-based polymer coating

A technology of water-based polymers and nanofibrils, which is applied in fiber treatment, polyester coatings, plant fibers, etc., and can solve problems such as poor dispersion and easy agglomeration

Active Publication Date: 2018-05-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor dispersion and easy agglomeration of cellulose nanofibrils, they have not been applied in water-based polymer coatings.

Method used

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  • A modified cellulose nanofibril solution and its modified water-based polymer coating
  • A modified cellulose nanofibril solution and its modified water-based polymer coating
  • A modified cellulose nanofibril solution and its modified water-based polymer coating

Examples

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preparation example Construction

[0040] The preparation method of the first modified cellulose nanofibril solution comprises the following steps:

[0041] Modifying the mixed solution including the silane coupling agent, cellulose nanofibrils and water to obtain a modified cellulose nanofibril solution.

[0042] In the present invention, the modification treatment described here is preferably stirring at room temperature. The present invention has no special requirements on the speed and method of stirring, as long as the mixing of the split cellulose nanofibrils and the silane coupling agent is uniform and sufficient. In the present invention, the modification treatment time is preferably 1 to 5 hours, specifically 1 hour, 2 hours, 3 hours, 4 hours or 5 hours.

[0043] The preparation method of the second modified cellulose nanofibril solution includes the following steps:

[0044]Performing fibrillation treatment on the mixed solution including silane coupling agent, cellulose raw material and water to ob...

Embodiment 1

[0061] Add 0.16 parts by mass of silane coupling agent KH550 and 0.3 parts by mass of wood powder cellulose to 100 parts by mass of distilled water, and perform ultrasonic treatment for 30 minutes at a power of 1200W, and continue to stir at room temperature for 3 hours to obtain modified cellulose nanofibril dispersion.

[0062] Take 5 parts by mass of the above dispersion liquid and add it to 100 parts by mass of waterborne acrylic polyurethane coating, and stir at room temperature for 3 hours to obtain the cellulose nanofibril modified waterborne acrylic polyurethane coating.

Embodiment 2

[0067] Add 0.16 parts by mass of silane coupling agent KH560 and 0.3 parts by mass of bamboo powder cellulose to 100 parts by mass of distilled water, perform ultrasonic treatment for 30 minutes at a power of 1200W, and continue stirring at room temperature for 3 hours to obtain modified cellulose nanofibril dispersion. Take 10 parts by mass of the above dispersion liquid and add it to 100 parts by mass of the water-based acrylic paint, and stir at room temperature for 3 hours to obtain the cellulose nanofibril modified water-based acrylic paint.

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Abstract

The invention provides a modified cellulose nano filament solution and a modified waterborne polymer coating thereof. Cellulose nano filaments are modified by adopting a silane coupling agent, the silane coupling agent and the cellulose nano filaments produce chemical crosslinking, the effect of steric hindrance is formed, and uniform dispersion and long-term stability of the cellulose nano filaments in the waterborne polymer coating are achieved. The obtained modified cellulose nano filament solution serves as a modifier to be combined with the waterborne polymer coating serving a substrate substance, only a little amount of modified cellulose nano filaments is needed, and the paint film Young modulus, hardness and abrasion resistance properties are remarkably improved on the premise that good film forming property and light transmittance of the obtained modified waterborne polymer coating are ensured.

Description

technical field [0001] The invention relates to the technical field of nanofiber materials, in particular to a modified cellulose nanofibril solution and a modified water-based polymer coating. Background technique [0002] Water-based polymer coating is a polymer coating that uses water as a solvent or dispersion medium. It has less organic volatiles, no irritating odor, and is environmentally friendly and healthy. It is a new and popular coating in the coating market and is widely used in furniture. and interior decoration. With the continuous improvement of people's awareness of environmental protection and the increasingly stringent environmental regulations, water-based polymer coatings have a good market development prospect. However, compared with traditional solvent-based coatings, water-based coatings are inferior in terms of solid content, film strength, hardness, fullness, wear resistance and gloss, and need to be thickened or reinforced. [0003] In order to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/51C09D7/65C09D175/14C09D175/04C09D133/00C09D163/00C09D167/00D06M101/06
CPCC09D7/65C09D133/00C09D163/00C09D167/00C09D175/04C09D175/14D06M13/51D06M2101/06
Inventor 于海鹏谭瑶刘永壮陈文帅刘一星
Owner NORTHEAST FORESTRY UNIVERSITY