蒸汽高温处理工艺对竹材软化效果的影响

吴一飞; 刘红征; 李延军; 夏俐; 许斌

蒸汽高温处理工艺对竹材软化效果的影响

Effect of Softening of Bamboo Specimen Treated by Steam

摘要

摘要: 以毛竹（Phyllostachys heterocycla cv. pubescens）材为研究对象，研究蒸汽高温处理温度、处理时间和毛竹初始含水率对毛竹抗弯弹性模量与静曲强度的影响。180℃蒸汽软化处理5 min 后试件自身温度下降规律，结果表明，随着处理温度的升高和时间的延长，试件弹性模量与静曲强度均呈下降趋势，并且在处理温度为160-200℃时，其力学性能下降最快；180℃软化处理5 min 后，初含水率为114%的泡水试件较初始含水率为11%的气干试件，静曲强度和弹性模量分别下降了51.8%，27.9%；蒸汽高温处理对竹材具有较好的软化效果，但处理后试件温度下降过快会导致其力学性能升高、塑性降低，不利于展平，在实际生产中应快速高效的进行软化展平，适当提高生产环境温度。

Abstract: Experiments were conducted on MOE and MOR of bamboo specimen treated by steam softening treatment with 5 diffenrent temperaturesand 2 durations. And temperature of specimen were determined treated by temperature of 180℃ and duration of 5 minutes. The results showed thatMOE and MOR decreased with the increase of softening temperature and duration, especially at temperature of 160℃ - 200℃. MOR of bamboospecimen with initial moisture content of 114% decreased by 51.8% and MOE decreased by 27.9% compared with speciment with initial moisturecontent of 11%. The experiment concluded that treatment of temperature at 180℃ and duration of 5 minutes had better softening effect.Recommandations were made on high moisture content of specimen and suitable factory temperature..

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