林业工程学报2024，Vol.9Issue(6)：52-59,8.DOI:10.13360/j.issn.2096-1359.202404006
石墨掺杂刨花板低碳制备工艺及性能
Low carbon preparation process and properties of graphite doped particleboard
摘要
Abstract
Wood and other plant materials have low thermal conductivity,resulting in inefficient heat transfer during the hot-pressing process of particleboards,which hinders the achievement of the"Double carbon"goal.To address this challenge,this study introduced graphite,a material with excellent thermal conductivity,and investigated the effects of different graphite additions(1％,3％,5％),mass ratios(1∶1∶1,0.5∶1∶1.5,1.5∶1∶0.5)of graphite with different particle sizes(45,11,6.5 µm),and hot-pressing temperatures(150,170,190 ℃)on the physical and mechanical properties of particleboard and its density distribution.Changes in internal temperature and water vapor pressure of the particleboard during hot-pressing were also examined.The results showed that the bending strength,modulus of elasticity,internal bonding strength,and screw withdrawal of particleboard were significantly influenced by graphite additions,while the 24 h thickness swelling rate of particleboard was mainly affected by graphite particle size ratios.With the increase of graphite addition(l％-5％),the internal bonding strength,modulus of elasticity,bending strength,24 h thickness swelling rate,and screw withdrawal of particleboard decreased.At a graphite addition of 1％,the internal bonding strength of particleboards prepared under hot-pressing temperatures of 150,170,and 190℃ increased by 13.2％,30.4％and 9.8％,respectively,compared to the particleboard without graphite added.The minimum 24 h thickness swelling rate of particleboard was achieved with a graphite particle size ratio of 1∶1∶1.The performance of particleboard improved with increasing hot-pressing temperature,when the graphite particle size ratio and addition amount were fixed at 1∶1∶1 and 1％,the introduction of graphite increased the temperature and steam pressure inside the slab during hot-pressing at 150,170 and 190 ℃,especially at lower hot-pressing temperatures.At hot-pressing temperature of 150 ℃,the addition of graphite caused the core temperature of the slab to be higher than that of the particleboard without graphite added at a hot-pressing temperature of 170 ℃ in the first 180 s of the hot-pressing process.Meanwhile,the addition of graphite also enhanced the thermal conductivity of particleboard,further optimizing the efficiency of the hot-pressing process.Considering all factors,the optimal graphite addition process can be achieved by the addition of 1％graphite,with 1∶1∶1 graphite particle size ratio,and using hot-pressing temperature of 150 ℃.关键词
石墨/刨花板/低碳制造/导热/热压工艺Key words
graphite/particleboard/low carbon manufacturing/heat conduction/hot-pressing process分类
农业科技引用本文复制引用
王军锋,李玉权,龙克莹,王冠昌,汤正捷..石墨掺杂刨花板低碳制备工艺及性能[J].林业工程学报,2024,9(6):52-59,8.基金项目
广西重点研发计划项目(桂科AB23026096) （桂科AB23026096）
广西科技重大专项课题(桂科AA23062014-1). （桂科AA23062014-1）
