同跨高比不同软化处理方法对荆条抗弯性能的影响  

Influence about Different Softening Treatments on Bending Properties of Vitex negundo Twigs with the Same Span to Diameter Ratio

作　　者：高璟[1] 张晓燕[1] 赵丽娟[1] 刘倩云[1] 

机构地区：[1]河北农业大学河北省林木种质资源与森林保护重点实验室,河北保定071000

出　　处：《西北林学院学报》2015年第5期224-229,共6页Journal of Northwest Forestry University

基　　金：国家科技部"十一五"科技支撑计划项目"华北土石山区植被恢复与重建技术试验示范"(2006BAD03A11);河北省林业局项目(0803015);河北农业大学重点科研基金项目"荆条材性分析及荆编家具制造工艺研究"

摘　　要：荆条是优良编织材料,荆条软化处理试验可为提高其柔软度、研发荆编家具提供理论依据。采用水煮、碳酸氢钠、尿素、乙二胺4种软化处理方法处理荆条,通过测定同跨高比时荆条的最大弯曲挠度、抗弯弹性模量、抗弯强度,分析不同软化处理对荆条纵向弯曲性能的影响。结果表明,4种软化处理的最大弯曲挠度表现为尿素、水煮>碳酸氢钠>乙二胺,并随直径的增大而增大,抗弯强度表现为碳酸氢钠>水煮>乙二胺>尿素。弹性模量表现为尿素<水煮<乙二胺、碳酸氢钠,大致随直径的增大而减小。4种软化处理方法中,尿素处理方法挠度大、抗弯弹模小、抗弯强度能满足使用要求,其软化效果最佳。Vitex negundo twigs are fine woven materials, in order to improve the flexibility of the twigs and to provide theoretical basis for woven furniture, 4 different softening method were adopted to soft the twigs with the same ratios of span to diameter, such as boiling water, solutions of sodium hydrogen carbonate, urea, and ethylenediamine. The bending performances such as maximum bending deflection, modulus of elasticity and bending strength of the twigs were tested to analyze the effects of the treatments on the bending properties. The results indicated that： the sequence of the maximum bending deflection was urea and boiling water 〉 sodium hydrogen carbonate 〉 ethylenediamine, and the maximum bending deflection increased with the diameter. The sequence of the bending strength was sodium hydrogen carbonate boiling water 〉 ethylenediamine 〉 urea. The sequence of the modulus of elasticity was urea 〈 boiling water〈 ethylenediamine and sodium hydrogen carbonate, and the modulus of elasticity generally decreased with the diameter. The large bending deflection and small modulus of elasticity were gained after being treated with urea and at the same time the bending strength could satisfy the requirement, so the softening effect with urea was the best.

关 键 词：荆条 软化处理 同跨高比 最大弯曲挠度 抗弯弹性模量 

分 类 号：S793.7[农业科学—林木遗传育种]