图片名称

Influence of Plasma Pretreated Wood on Wood Surface Wetting

Keywords:

Published on:

05 Feb,2021

Influence of Plasma Pretreated Wood on Wood Surface Wetting:

The wettability of wood is an important interface characteristic to describe the difficulty and effect of wetting, diffusion and bonding on wood surface when some liquids (water, adhesives, oxidants and cross-linkers, etc.) contact wood. Plasma pretreatment is of great significance for wood interface and various modification treatment processes.

Plasma Pretreated Wood on Wood Surface Wetting

As a kind of natural polymer, wood not only has the dual characteristics of biology and physical chemistry, but also as an anisotropic material with inhomogeneity, its surface structure and chemical composition affect the adhesion of wood, and then affect the overall strength, toughness, durability and other properties of wood.

Experimental method: put the wood veneer on the lower tray of the plasma cleaning machine, put the tray in the reaction chamber, and close the chamber door. Then open the vacuum pump to vacuum, pump to the corresponding vacuum, open the gas required for plasma treatment, press the RF key for plasma treatment, according to the test set time after treatment, the sheet out, sealed with a sealing paper, to be determined. Because of the aging of plasma treatment, the surface contact Angle of the treated samples should be tested in the shortest possible time.

Results and analysis: By the plasma cleaning machine after pretreatment, about 3 minutes after the contact Angle is 113.8 ° dropped to about 50 °, with the extension of processing time, the contact Angle change tends to be stable or increase slightly, especially when the processing time is more than 7 min, wood surface by high energy electron, ion relatively uninterrupted, energy accumulation is bigger, the local have excessive corrosion phenomena, and plasma processing make the wood surface produces a large number of oxygen containing functional group and peroxide, including parts of the carboxyl and carbonyl hair base, lead to an increase in temperature of the wood in the plasma of high energy discharge, easy to cause local color darker wood surface, produce coking phenomenon. Therefore, low temperature plasma discharge treatment of wood, the treatment time of 3min is appropriate.

Hot Products

Related articles