In order to explore the mechanism of both the surface morphology and wetting characteristics of wood that was modified by electric discharge active particles

a discharge plasma system with needle-plate electrode structure was used to modify the surface of white pine

which could be generated the positive and negative DC corona discharge. Then

parameters were examined by a scanning electron microscope（SEM）

contact angle measuring instrument

Raman spectrometer

and infrared spectrometer

respectively. Furthermore

the surface modification characteristics of the white pine wood including the surface morphology

wetting characteristics

and chemical groups were analyzed. Results show that

as both discharge voltage and treatment time for processing the white pine wood surface increase

the roughness and wettability will increase

the Raman spectrum intensity of the cellulose and lignin will decrease

and the infrared spectrum intensity of the hydrophilic group will increase. Additionally

on the white pine wood surface treated with discharge

there are strong correlation characteristics among the surface microscopic morphology

wetting characteristics

and chemical groups. This work provides a valuable reference for the applications of corona discharge in wood surface modification.