不同木材和竹材比例对木竹层积复合材机械性能的影响(英文)

Effect of Material Ratios on Mechanical Properties of the Layered Laminate Bamboo-wood Composites

由于木竹复合材料的性能与原料的类型、施胶量、工艺参数、木材和竹材的比例等许多因素有关,本文研究了不同木材和竹材的比例对木竹层积复合材的性能影响,采用的酚醛胶固含量为45%,板材尺寸800 mm×800 mm×10 mm,热压时间15min,热压温度150℃,热压压力2.5 MPa。试验结果表明:木材和竹材的比例对木竹复合材料的静曲强度、弹性模量和胶合强度有显著影响,对其含水率影响较小。当木材比例从20%到60%时,木竹复合材料的静曲强度、弹性模量和胶合强度逐渐增加。

The objective of this paper is to investigate the effect of material ratios on mechanical properties of the layered laminate bamboo-wood composite. The properties of the layered laminate bamboo-wood composite depend on many factors such as type and quality of materials, type and amount of glue used, production technology parameters, material ratios （bamboo/wood） of the product, etc. Therefore, the results were presented on determining the effect of material ratios on mechanical properties of the layered laminate composite made from Dendrocalamus membranaceus Munro and Styrax tonkinensis Pierre in this paper. The product were manufactured using a commercial liquid phenolic resin with 45% solid content to the nominal dimensions of 800 mmx 800 mm x 10 mm. Hand-formed mats were pressed for 15 min at a temperature of 150℃; the maximum pressure applied was 2.5 MPa The results showed that the material ratios of laminate composite affected some properties such as the modulus of rupture （MOR）, modulus of elasticity （MOE）, and bonding strength. However, there were minor effects on the moisture content of the product. The modulus of rupture, modulus of elasticity, and bonding strength of the product increased when wood ratio in the product increased from 20%-60% of total materials.