The use of a phosphate nanofile and scratch-resistant water-resistant coating

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(，Zirconium Phosphate，Zirconium Hydrogen Phosphate)，，，，(Zirconium Phosphate Nanoplatelets)。，，。

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1

2g50mL。3g(PVA，67000)50mL，。，1，。

，65℃。SEM()，5。5，，。

1

1，，。

，65℃。

2

5g(PVA，67000)100mL，。

2

3g90mL，3 .

5mL，25wt％，30min。10mL，30wt％，1，。

，65℃。

3

2，，。

，65℃。

4

20mL，30wt％80ml，。

，65℃。

3

After adding 2 g of micron-sized zirconium phosphate nanosheets to 60 mL of water to dissolve and stir uniformly, 1 mL of polyetheramine was added dropwise under stirring, and then ultrasonicated for 30 minutes for use.

1.
5g polyvinyl alcohol (PVA, number average molecular weight 67000) was dissolved in 35mL water under heating and stirring, and then 5mL, 30wt% aqueous polyurethane solution was slowly added to the above polyvinyl alcohol aqueous solution under stirring conditions , Prepared into polyvinyl alcohol/water-based polyurethane mixed solution.
Add the prepared micron diameter zirconium phosphate nanosheet solution slowly to the above polyvinyl alcohol/aqueous polyurethane mixed solution under stirring, and stir for at least 1 hour after the addition to obtain a micron diameter zirconium phosphate nanosheet modified poly Vinyl alcohol/waterborne polyurethane hybrid coating.

The surface of the stainless steel plate is uniformly coated with the polyvinyl alcohol/water-based polyurethane mixed paint modified by the micron-sized diameter zirconium phosphate nanosheets by spraying, and dried in an oven at 65° C.

to form a film.

Comparative example 5

The difference from Example 3 is that the micron-sized diameter zirconium phosphate nanosheets are replaced with titanium dioxide to prepare a titanium dioxide-modified polyvinyl alcohol/waterborne polyurethane hybrid coating.

Using the same method as in Example 3, the above-mentioned titanium dioxide-modified polyvinyl alcohol/waterborne polyurethane mixed coating was dried into a film.

Comparative example 6

1.

5g polyvinyl alcohol (PVA, number average molecular weight 67000) was dissolved in 95mL water under heating and stirring, and then 5mL, 30wt% aqueous polyurethane solution was slowly added to the above polyvinyl alcohol aqueous solution under stirring, Prepared into polyvinyl alcohol/waterborne polyurethane mixed coating.

Using the same method as in Example 3, the above-mentioned polyvinyl alcohol/waterborne polyurethane mixed coating was dried into a film.

Example 4

Add 1.

5 g of nanometer-sized zirconium phosphate nanosheets and 1.
5 g of micrometer-sized zirconium phosphate nanosheets into 90 mL of water to dissolve and stir evenly, and then add 3.
5 mL of 25wt% tetrabutylammonium hydroxide solution dropwise under stirring conditions.
Then ultrasound for 30 minutes for use.
10mL, 30wt% of the aqueous polyurethane solution was slowly added to the zirconium phosphate nanosheet solution under stirring, and stirred for at least 1 hour after the addition, to obtain a nano-micron diameter zirconium phosphate nanosheet modified waterborne polyurethane coating.

Coat the surface of ABS (acrylonitrile-butadiene-styrene block copolymer) by spraying uniformly with the above-mentioned nano-micron diameter zirconium phosphate nanosheet modified waterborne polyurethane coating, and dry it in an oven at 65°C to form a film .

Comparative example 7

The difference from Example 4 is that the zirconium phosphate nanosheets are replaced with the same amount of montmorillonite to prepare a montmorillonite-modified waterborne polyurethane coating.

Using the same method as in Example 4, the above-mentioned montmorillonite-modified waterborne polyurethane coating was dried into a film.

Comparative example 8

20mL, 30wt% of water-based polyurethane solution was slowly added to 80ml of water under stirring conditions to prepare water-based polyurethane paint.

Using the same method as in Example 4, it was dried into a film.

Example 5

The difference from Example 1 is that polyvinyl alcohol is replaced with polyvinylpyrrolidone (number average molecular weight 8000) to prepare a micron-sized diameter zirconium phosphate nanosheet modified polyvinylpyrrolidone coating.

It is coated on the surface of the glass sheet by dip coating, and dried in an oven at 65°C to form a film.

Comparative example 9

The difference from Example 5 is that the micron-sized diameter zirconium phosphate nanosheets are replaced with titanium dioxide to prepare a titanium dioxide-modified polyvinylpyrrolidone coating.

Using the same method as in Example 5, it was dried into a film.

Comparative example 10

5 g of polyvinylpyrrolidone (number average molecular weight 8000) was dissolved in 100 mL of water under heating and stirring conditions to prepare a polyvinylpyrrolidone paint.
Using the same method as in Example 5, it was dried into a film.

Example 6

The difference from Example 1 is that polyvinyl alcohol is replaced with polyethylene glycol (number average molecular weight 10000) to prepare a micron-sized diameter zirconium phosphate nanosheet modified polyethylene glycol coating.
It is coated on the surface of the glass sheet by dip coating, and dried in an oven at 65°C to form a film.

Comparative example 11

The difference from Example 6 is that the micron-sized diameter zirconium phosphate nanosheets are replaced with titanium dioxide to prepare a titanium dioxide-modified polyethylene glycol coating.
It was dried into a film by the same method as in Example 6.

Comparative example 12

5 g of polyethylene glycol (number average molecular weight 10,000) was dissolved in 100 mL of water under heating and stirring to prepare polyethylene glycol paint.
It was dried into a film by the same method as in Example 6.

Example 7

The difference from Example 2 is that the aqueous polyurethane solution is replaced with an aqueous polyacrylic resin solution (20 wt%) to prepare a nano-scale diameter zirconium phosphate nanosheet modified aqueous polyacrylic resin coating.
Coat it evenly on the surface of the board by spraying, and dry it into a film in an oven at 65°C.

Comparative example 13

The difference from Example 7 is that the nano-scale diameter zirconium phosphate nanosheets are replaced with montmorillonite to prepare a montmorillonite modified water-based polyacrylic resin coating.
It was dried into a film using the same method as in Example 7.

Comparative example 14

20mL, 20wt% of water-based polyacrylic resin solution was slowly added to 80ml of water under stirring conditions to prepare water-based polyacrylic resin paint.
It was dried into a film using the same method as in Example 7.

Example 8

The difference from Example 2 is that the aqueous polyurethane solution is replaced with an aqueous epoxy resin solution (20 wt%) to prepare a nano-scale diameter zirconium phosphate nanosheet modified aqueous epoxy resin coating.
Coat it evenly on the surface of the board by spraying, and dry it into a film in an oven at 65°C.

Comparative example 15

The difference from Example 8 is that the nano-scale diameter zirconium phosphate nanosheets are replaced with montmorillonite to prepare a montmorillonite-modified waterborne epoxy resin coating.
It was dried into a film by the same method as in Example 8.

Comparative example 16

20mL, 20wt% water-based epoxy resin solution was slowly added to 80ml of water under stirring conditions to prepare water-based epoxy resin paint.
It was dried into a film by the same method as in Example 8.

Example 9

The difference from Example 7 is that the nano-diameter zirconium phosphate nanosheets are replaced with micrometer-scale zirconium phosphate nanosheets to prepare a micron-scale diameter zirconium phosphate nanosheet modified water-based polyacrylic resin coating.
Coat it evenly on the surface of the board by spraying, and dry it into a film in an oven at 65°C.

Comparative example 17

The difference from Example 9 is that the micron-sized diameter zirconium phosphate nanosheets are replaced with the same amount of montmorillonite to prepare the montmorillonite-modified waterborne polyacrylic resin coating.
It was dried into a film by the same method as in Example 9.

Comparative example 18

20mL, 20wt% of water-based polyacrylic resin solution was slowly added to 80ml of water under stirring conditions to prepare water-based polyacrylic resin paint.
It was dried into a film by the same method as in Example 9.

Example 10

The difference from Example 4 is that the aqueous polyurethane solution is replaced with an aqueous polyacrylic resin solution (20 wt%) to prepare a nano-micron diameter zirconium phosphate nanosheet modified aqueous polyacrylic resin coating.
Coat it evenly on the surface of the board by spraying, and dry it into a film in an oven at 65°C.

Comparative example 19

The difference from Example 10 is that the nano-micron diameter zirconium phosphate nanosheets are replaced with the same amount of montmorillonite to prepare the montmorillonite-modified waterborne polyacrylic resin coating.
It was dried into a film by the same method as in Example 10.

Comparative example 20

20mL, 20wt% of water-based polyacrylic resin solution was slowly added to 80ml of water under stirring conditions to prepare water-based polyacrylic resin paint.
It was dried into a film by the same method as in Example 10.

Example 11

The difference from Example 1 is that the mass of the micron-sized zirconium phosphate nanosheets is 6 g, and the polyvinyl alcohol coating modified by the micron-sized zirconium phosphate nanosheets is prepared.
It was dried into a film in the same way as in Example 1.

Comparative example 21

The difference from Example 11 is that the micron-sized diameter zirconium phosphate nanosheets are replaced with the same amount of titanium dioxide to prepare a titanium dioxide-modified polyvinyl alcohol coating.
It was dried into a film in the same way as in Example 1.

Comparative example 22

3 g of polyvinyl alcohol (PVA, number average molecular weight 67,000) was dissolved in 100 mL of water under heating and stirring to prepare a polyvinyl alcohol paint.
It was dried into a film in the same way as in Example 1.

Example 12

The difference from Example 2 is that the mass of the nano-diameter zirconium phosphate nanosheets is 6 g, and the water-based polyurethane coating modified by the nano-diameter zirconium phosphate nanosheets is prepared.
It was dried into a film in the same way as in Example 2.

Comparative example 23

The difference from Example 12 is that the nano-scale diameter zirconium phosphate nanosheets are replaced with the same amount of montmorillonite to prepare the montmorillonite-modified waterborne polyurethane coating.
It was dried into a film in the same way as in Example 2.

Comparative example 24

10mL, 30wt% of water-based polyurethane solution was slowly added to 90ml of water under stirring conditions to prepare water-based polyurethane paint.
It was dried into a film in the same way as in Example 2.

According to the standard of ISO19252, the coatings formed by curing the coatings provided in the above 1-9 and the comparative examples 1-18 were subjected to a scratch test.
The vertical force on the starting point of scratch damage and the average coefficient of friction before scratch damage are used to characterize the scratch resistance of the coating.
The greater the vertical force on the starting point of scratch damage of the coating, the lower the average coefficient of friction before scratch damage.
The scratch resistance of the coating is better.
The test results are shown in Table 1 below

From the results in Table 1, it can be seen that compared with unmodified water-based paints and water-based paints modified with titanium dioxide and montmorillonite, the cured coatings of water-based paints modified with zirconium phosphate nanosheets have reduced friction coefficients and scratch damage The vertical force on the starting point is increased, and it has better scratch resistance.
Moreover, compared with the water-based paint modified by micron-diameter or nano-diameter zirconium phosphate nanosheets alone, the cured coating of water-based paint modified with micron-diameter zirconium phosphate nanosheets and nano-diameter zirconium phosphate nanosheets The scratch resistance is further improved.

Picture reference