The Effects Of MOE And Wettability Of Poplar Treated With Hot Water And Enzyme

This paper studied on Poplar in order to research the woods which were treated with hot water and enzyme and find out the variational rules of MOE and wettability by FTIR, Surface tensions determinator and Nano indenter which were very advanced. These things can offer new theory basis and experiment datum to the process of modified Poplar and Poplar's composites.Researching conclusions:1) By hydrothermal treatments, the wettability of Poplar increased and the effects of temperature factor were more obvious than time factor as for wettability because the hydroxyl (-OH) and carbonyl (C=O) on the surface of Poplar had been changed. The MOE of wood was improved when compression rate was increased from 35% to 50%. There were lots of bugs in the treated woods when the compression rate past 60% because the room in wood fiber and vessels were extruded to a small room. Author believed that the effects of the compression rate factor were more obvious than the temperature factor as for MOE.2) By enzyme treatments, the wettability and MOE of Poplar improved because the hydroxyl (-OH) on surface and hemicellulose had been changed. But when the treatment time and enzyme dosage increased persistingly, the change of wettability and MOE were not obvious and the MOE sometimes was declined. Author came to a conclusion that less than 6 hours and 450IU/g were prefect treatment process.3) The wood had been changed in physical and chemic when treated with hot water and enzyme. Hydrothermal treatments were physical while enzyme treatments were chemical and both of them can not pollute the environment for second time. Hydrothermal treatments and enzyme treatments can improve the wettability and mechanical capability, also increased the using of wood.