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Preparation method of waterborne polyurethane/inorganic nanocomposite coating with biomimetic micropatterning

A water-based polyurethane, inorganic nano technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve rare problems

Active Publication Date: 2022-05-17
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-dimensional inorganic nanopowders such as hexagonal boron nitride, graphene, and graphene oxide also have rich two-dimensional morphologies, but the research on micropatterning based on the interaction between two-dimensional inorganic nanopowders and polymers is very limited. rare

Method used

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  • Preparation method of waterborne polyurethane/inorganic nanocomposite coating with biomimetic micropatterning
  • Preparation method of waterborne polyurethane/inorganic nanocomposite coating with biomimetic micropatterning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] Weigh the nano hexagonal boron nitride 10 g, add 30 ml of acetone, ultrasonic dispersion for 30 min to obtain the dispersion; add 100 g of waterborne polyurethane emulsion with a solid content of 30%, add 20 ml of absolute ethanol under high-speed stirring, continue to stir for 30 min, to obtain aqueous polyurethane / nano boron nitride emulsion; take an appropriate amount of the above emulsion into the PP box, dry at 60 °C for 24 hours, to obtain a biomimetic micro-patterned aqueous polyurethane / nano boron nitride coating.

[0026] Preparation of micro-patterned waterborne polyurethane / nano boron nitride coating surface polarization microscopy photographs such as Figure 1 as shown. from Figure 1 It can be seen that a regular feather-like bionic pattern was prepared. Figure 2 Respectively , (a) are pure waterborne polyurethanes; (b) Solid ultraviolet spectra of micro-patterned waterborne polyurethane / nanoboron nitride composites, from which it can be seen that the ultrav...

Embodiment approach 2

[0028] Weigh the nano hexagon boron nitride 15 g, add 30 ml of acetone, ultrasonic dispersion for 30 min to obtain the dispersion; add 100 g of waterborne polyurethane emulsion with a solid content of 30%, add 50 ml of absolute ethanol under high-speed stirring, continue to stir for 30 min, to obtain aqueous polyurethane / nano boron nitride emulsion; take an appropriate amount of the above emulsion into the PP box, dry at 60 °C for 24 hours, to obtain a biomimetic micro-patterned waterborne polyurethane / nano boron nitride coating.

Embodiment approach 3

[0030] Weigh 10 g of nano graphene, add 30 ml of acetone, ultrasonic dispersion for 30 min to obtain dispersion; add 100 g of waterborne polyurethane emulsion with a solid content of 30% in the dispersion, add 20 ml of absolute ethanol under high-speed stirring, continue to stir for 30 min, and obtain waterborne polyurethane / nano graphene emulsion; take an appropriate amount of the above emulsion on the PTFE plate, dry at 60 °C for 1 h, to obtain a biomimetic micro-patterned waterborne polyurethane / nano graphene coating.

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Abstract

The invention relates to the field of polymer composite materials, and discloses a method for preparing a bionic micropatterned waterborne polyurethane / inorganic nanocomposite material coating. The specific steps are: dispersing two-dimensional inorganic nanopowder in a low-boiling point organic solvent A , ultrasonically disperse for 20-30 min to form a dispersion liquid; disperse the dispersion liquid in the water-based polyurethane emulsion under high-speed stirring, and add a low-boiling point organic solvent B whose evaporation rate is lower than that of the low-boiling point organic solvent A, and stir at room temperature for 20-30 min to obtain Waterborne polyurethane / inorganic nanocomposite emulsion; pour it into a mold and dry in an oven to obtain a biomimetic micropatterned waterborne polyurethane / inorganic nanocomposite coating. According to the different evaporation rates of solvents A and B, the inorganic nanopowder and waterborne polyurethane form shrinkage through molecular self-assembly and interface self-organization to prepare a bionic bottom-up micropatterned waterborne polyurethane / inorganic nanocomposite coating .

Description

Technical field [0001] The present invention relates to the field of polymer composite materials, particularly to a preparation method for preparing a composite coating having a biomimetic micro-patterning by using aqueous polyurethane and two-dimensional inorganic nano-powders. Background [0002] Patterned surfaces are widely present in nature, such as macroscopic mountain ranges, biological skin and lotus leaves and other plant micro and nano patterns, in addition to aesthetic value, but also have superhydrophobic, self-cleaning, control adhesion and special optical properties, in biology, optoelectronics, energy, environment and other fields have important research value and potential application prospects. In recent years, the construction of biomimetic micro-patterned surfaces has become one of the hot spots in the scientific research of material surfaces. [0003] At present, surface micro-patterning technology is mainly divided into top-down and bottom-up two categories....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61C09D7/20
CPCC09D175/04C09D7/61C09D7/20C09D7/67C09D7/70C08K2201/011C08K2003/385C08K3/38C08K3/042
Inventor 高晓燕倪伶俐陆晓庆夏正旺王雨星姜孝武蔡鹏冯良东
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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