Effects of Natural Aging on Physicochemical and Combustion Properties of Bamboo Scrimber

De-yue LI; Qi GAO; Ben-hua FEI; Rui-guo CHEN; Zhi-jia LIU

doi:10.12326/j.2096-9694.2021067

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Effects of Natural Aging on Physicochemical and Combustion Properties of Bamboo Scrimber
1.International Centre for Bamboo and Rattan，Beijing 100102， China
Vol. 36, Issue 1, Pages: 80-86(2022)
DOI： 10.12326/j.2096-9694.2021067

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李德月,高奇,费本华等.自然老化对重组竹理化和燃烧性能的影响[J].木材科学与技术,2022,36(01):80-86.

LI De-yue,GAO Qi,FEI Ben-hua,et al.Effects of Natural Aging on Physicochemical and Combustion Properties of Bamboo Scrimber[J].Chinese Journal of Wood Science and Technology,2022,36(01):80-86.
李德月,高奇,费本华等.自然老化对重组竹理化和燃烧性能的影响[J].木材科学与技术,2022,36(01):80-86. DOI： 10.12326/j.2096-9694.2021067.

LI De-yue,GAO Qi,FEI Ben-hua,et al.Effects of Natural Aging on Physicochemical and Combustion Properties of Bamboo Scrimber[J].Chinese Journal of Wood Science and Technology,2022,36(01):80-86. DOI： 10.12326/j.2096-9694.2021067.

摘要

为了分析自然老化对户外重组竹性能的影响，本研究选取在青岛户外放置两年的重组竹为研究对象，测试其理化性能和燃烧性能。结果显示，与对照样相比，老化后重组竹的吸水厚度膨胀率和吸水率分别提高了88.32%和35.62%，弹性模量和静曲强度的残余率分别为79.91%、75.72%。自然老化后重组竹的尺寸稳定性和力学强度仍能满足GB/T 40241—2021《户外重组竹》的要求。老化后重组竹灰分含量提高了1.64倍，挥发分含量减少3.13%，固定碳含量提高2.29%；竹束内的半纤维素和纤维素降解；与对照样相比，老化重组竹的点燃时间延迟22 s；热释放速率峰值降低8.41%，总释烟量降低18.53%，总释热量变化不显著。

Abstract

In order to investigate the effect of natural aging, the bamboo scrimber, which was placed outdoors in Qingdao for two years was selected to test for the physicochemical and combustion properties. The results showed that the thickness swelling and water absorption of aged bamboo scrimber increased by 88.32% and 35.62%, respectively. The residual rate of modulus of elasticity and modulus of rupture were 79.91% and 75.72%, respectively. The dimensional stability and mechanical strength of aged bamboo scrimber can still met the requirements of GB/T 40241—2021 ",Outdoor Bamboo Scrimber,". The ash and fixed carbon content of aged bamboo scrimber were increased by 1.64 times and 2.29% than that of controlled samples, while the volatile content was decreased by 3.13%. In addition, the hemicellulose and cellulose in the aged bamboo scrimber were seriously degraded. The combustion test results showed that the ignition time of aged bamboo scrimber was extended by 22 seconds; the peak heat-release rate and the total smoke-release content decreased 8.41% and 18.53% respectively, while the total energy of heat-release changed slightly.

关键词

重组竹自然老化接触角力学强度燃烧性能

Keywords

bamboo scrimbernatural agingcontact anglemechanical strengthcombustion performance

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