Table 3 Comparison of hardness test results of water-based acrylic paint with SF additive and F-SF NPs.

From: Thermal insulation of water-based acrylic coatings reinforced with APTES-functionalized silica fume nanoparticles

Samples

Addition percentage (wt%)

Hardness(ASTM D4366)

SF NPs

 

Step1

Step2

Step3

Ave.

SD

0

56

45

56

52.33

5.18

0.5

58

57

54

56.33

1.69

1

64

62

66

64

1.63

1.5

56

59

61

58.66

2.05

F-SF NPs

 

Step1

Step2

Step3

Ave.

SD

0.5

64

60

54

59.33

4.10

1

55

53

58

55.33

2.05

1.5

62

65

64

63.66

1.24

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