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Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 6 Chemical surface composition and component ratios of the studied samples determined by XPS analysis

From: Study on the changes in surface characteristics of Populus tomentosa due to thermo-hydro-process

Samples

Atomic composition

C1s components

O%

C%

O/C

C1%

C2%

C3%

C4%

C1/C2

Untreated

28.86

70.38

0.410

39.07

47.23

10.57

3.13

0.83

CR50

28.81

70.40

0.409

39.16

46.94

10.41

3.49

0.83

CR60

28.76

70.43

0.408

40.88

46.31

9.95

2.85

0.88

CR70

27.78

71.70

0.387

42.61

45.93

9.51

1.94

0.93

CR75

27.14

72.06

0.377

43.63

44.70

9.28

2.39

0.98

  1. CR compression ratio, XPS X-ray photo-electron spectroscopy, O/C the ratio of oxygen to carbon element, C1 carbon atoms bonded with other carbon or hydrogen, C2 carbon atoms bonded with one oxygen atom, C3 carbon atoms bonded with two oxygen atom, C4 carbon atoms bonded with three oxygen atom, C1/C2 the ratio of C1 to C2
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