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Official Journal of the Japan Wood Research Society

Table 2 Contact angles of rice straw on different surfaces with different adhesives

From: Dynamic wettability and curing characteristics of liquefied bark-modified phenol formaldehyde resin (BPF) on rice straw surfaces

Resin

Surface sample

Contact angle

K value (×10−2) (1/s)

θ i

θ e

Percent decrease (%)

BPF

T-E

70.0

54.4

22.3

1.154

T-I

62.0

48.8

25.0

1.368

UT-E

76.6

63.5

14.1

1.084

UT-I

71.0

60.2

15.2

1.121

BPF–PMDI

T-E

75.8

67.5

10.9

0.493

T-I

72.5

62.8

13.4

0.666

UT-E

81.9

75.1

8.3

0.347

UT-I

75.6

66.4

12.2

0.453

PF

T-E

78.0

73.7

5.5

0.372

T-I

75.6

69.4

8.2

0.389

UT-E

83.5

80.1

4.1

0.197

UT-I

84.7

78.3

7.6

0.344

  1. T-E treated exterior surface, T-I treated interior surface, UT-E untreated exterior surface, UT-I untreated interior surface