热处理对水与木材接触角的影响

以多枝桉和扁柏作供试木材,采用扩大影象法,测定了热处理和空气层对水与木材的接触角的影响。结果表明,热处理温度、时间、木材含水率和在空气中暴露的时间等,对两种试材与水的接触角均有显著的影响。树种不同,其影响程度不一。可根据水与木材的接触角大小,判断各种木材的亲水性。

THE IMPACT OF HEAT TREATMENT ON THE CONTACT ANGLE BETWEEN WOOD AND WATER

With the wood of Eucalyptus viminalis and Chamaecyparis obtusa as experimental materials, and adopting the method of image amplification, the impact of heat treatment and air layer on the contact angle between the tested wood and water was determined. Results show that the temperature, the time of the wood being treated, the moisture content of the wood, and the time when the wood was exposed in air, have a remarkable influence upon the contact angles between the two kinds of wood and water. The degree of influence varied with the tree species. Therefore, the hydrophilicity of various woods can be judged according to the value of the contact angle between water and the wood.