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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 2 Surface composition of the wood dowel and welding interface determined by XPS

From: Mechanics and pyrolysis analyses of rotation welding with pretreated wood dowels

Test group Samples Elements (%) Ratio (%)
C O N O/C
Group A Wood dowel 76.52 (1.24) 22.92 (1.30) 0.56 (0.07) 29.98 (2.19)
Welding interface 70.79 (1.58) 28.69 (1.37) 0.52 (0.22) 40.56 (2.83)
Group B (CuCl2) Wood dowel 75.31 (2.75) 24.11 (2.82) 0.58 (0.17) 32.13 (4.95)
Welding interface 70.43 (3.07) 29.05 (3.11) 0.52 (0.04) 41.43 (6.21)
Test group Samples Carbon C1s components (%)
C1 C2 C3 C4
Group A Wood dowel 65.23 (2.97) 25.14 (2.80) 6.68 (1.87) 2.95 (1.69)
Welding interface 56.81 (5.02) 31.19 (6.19) 10.07 (2.26) 1.93 (1.81)
Group B (CuCl2) Wood dowel 61.54 (2.12) 30.55 (3.88) 5.46 (2.50) 2.45 (1.54)
Welding interface 48.73 (3.14) 39.82 (4.36) 9.68 (2.20) 1.77 (1.02)
  1. 1, wood dowel and welding interface of group A meant untreated samples; 2, wood dowel and welding interface of group B (CuCl2) meant treated samples; 3, elements (%) of C, O, and N meant the amount of these elements in the samples, respectively; 4, C1: C–C/C–H bonds, 284.6 eV; C2: C–O bonds, 286.5 eV; C3: C=O/O–C–O bonds, 287.9 eV; C4: O=C–O bonds, 289.2 eV; 5, the ratio of O/C meant the ratio of the amount of O and C; 6, test results were the mean value of three samples; 7, values in parentheses were standard deviation