Abstract:
The wood surfaces of Pinus kesiya and Betula alnoides were modified at different times using perfluorohexane plasma polymerization. The wettability of the wood surfaces before and after modification, element composition and their chemical bonding information, and surface morphology were measured and analyzed by contact angle measurement, Xray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The results showed that the water contact angle of both two kinds of wood surfaces first increased and then decreased slightly with the increase of treatment time, and reached a maximum of water contact angle value with 9 min treatment. The water contact angle value of early wood and late wood of Pinus kesiya and Betula alnoides is 1301°, 1312° and 1355°, respectively. When treatment time was 9min, the wood surfaces F content for Pinus kesiya and Betula alnoides were 3392% and 2473%, respectively. Furthermore, the functional groups of the polymerization polymer films were mainly composed of CC, CCFn, CF, CF2 and CF3. After plasma polymerized perfluorohexane was applied to wood surfaces, irregular structure formed on the cell wall surface of Pinus kesiya, whereas a twistslike structure formed on Betula alnoides.