室外地板用竹基纤维复合材料制备技术

Manufacturing Technology of Bamboo-Based Fiber Composites Used as Outdoor Flooring

以酚醛树脂为胶黏剂,以毛竹和慈竹为原料,在不去竹青和竹黄的条件下,采用点裂和线裂纤维分离技术,将半圆竹筒疏解形成由竹纤维束交织而成的网状结构纤维化竹单板,经过热处理、浸胶、热压等工序制造本色和炭化色室外地板用竹基纤维复合材料,并与室外地板用重组竹的性能进行对比。结果表明:竹基纤维复合材料性能优于重组竹,慈竹竹基纤维复合材料的性能优于毛竹;热处理对吸水厚度膨胀率、防腐和防霉等性能具有改善作用,对水平剪切强度具有不利影响;采用纤维化单板,改变了传统重组竹的束状元结构,提高了竹材的利用率和生产效率,可促进竹材产业升级尤其是丛生竹的工业化利用。

The untreated and thermo-treated PhyUostachys edulis and Bambusa emeiensis bamboo fibrous veneer, which made with the dotted and/or linear shaped fiber separation technology on the semicircular bamboo tube, were reconstructed to form bamboo-based fiber composites with phenolic-formaldehyde adhesive. The physical and decay resistance properties were evaluated, and compared with the traditional bamboo bundle scrimber. The results showed that： Bamboo-based fiber composites showed superior performance than that of bamboo bundle scrimber. Bamboo-based fiber composites made from Bambusa emeiensis had better performances than that made from Phyllostachys edulis. Thermo-treatment would improve the properties of thickness swell, mould proof and so on, but decrease the horizontal shear strength. The bamboo fibrous veneer composed of interlaced fiber bundle was manufactured directly from semicircular bamboo tube without special removing the outer and inner layer of bamboo. The process was easier and the production efficiency was higher compared with traditional bamboo bundle.