摘要
以邓恩桉(EuCahetus dunnii Maiden)旋切单板为基材,热塑性聚丙烯薄膜为胶黏剂,通过热压-冷压联合工艺,研发了一种高性能、环保的新型木塑复合材料。通过正交试验优化生产工艺参数,探索了热压过程中关键参数的影响。结果表明:热压工艺对复合材料的弯曲性能具有明显影响。静曲强度的受影响程度为热压压强>热压时间>薄膜剂量,弹性模量的受影响程度为热压时间>薄膜剂量>热压压强。在此基础上,采用一阶线性模型揭示了热压工艺与邓恩桉/聚丙烯复合材料弯曲性能的数学层面相关性。在最优参数组合下(热压压强0.9 MPa、热压时间420 s、薄膜剂量150 g/m^(2)),所得复合材料的静曲强度和弹性模量分别为109.58 MPa和13.89 GPa,远超GB/T 9846—2015《普通胶合板》中的相关要求。
Using EuCahetus dunnii Maiden rotary-cut veneer as matrix,and thermoplastic polypropylene film as adhesive,a high-performance,environmentally-friendly new wood plastic composite material was created through a combined hot-cold pressing process.Orthogonal experiment was employed to optimize production process parameters and explore influence of key parameters in hot-pressing process.Results showed that hotpressing process had a remarkable impact on bending performance of composite materials.Degree of influence on modulus of rupture was as follows:hot-pressing pressure>hot-pressing duration>film dosage,while degree of influence on modulus of elasticity was as follows:hot-pressing duration>film dosage>hot-pressing pressure.On this basis,the first-order linear model was proposed to reveal mathematical correlation between hotpressing process and bending performance of EuCahetus dunnii Maiden/polypropylene composite material.At combination of optimal parameters(hot-pressing pressure 0.9 MPa,hot-pressing duration 420 s,and film dosage 150 g/m^(2)),the obtained modulus of rupture and modulus of elasticity of composites were 109.58 MPa and 13.89 GPa,respectively,far exceeding the related requirements of GB/T 9846—2015 Plywood for General Use.
作者
韦文榜
宋伟
WEI Wen-bang;SONG Wei(Guangxi Eco-Engineering Vocational&Technical College,Liuzhou 545004,Guangxi,P.R.China;Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo&Rattan Science and Technology,International Centre for Bamboo and Rattan,Beijing 100102,P.R.China;Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,P.R.China)
出处
《林产工业》
北大核心
2025年第6期16-20,共5页
China Forest Products Industry
基金
国家自然科学基金(32230072,32171707)
广西职业教育教学改革研究项目(GXGZJG2023A024)
广西高校中青年教师科研基础能力提升项目(2021KY1213)
柳州市职业教育教学改革重点委托课题(LZJ2024A009)
南平市科技计划项目(HNP2024KT0010008)
福建省科技特派员后补助项目(2024S2055)。
关键词
邓恩桉
聚丙烯薄膜
木塑胶合板
热压工艺
弯曲性能
EuCahetus dunnii Maiden
Polypropylene film
Wood plastic plywood
Hot-pressing process
Bending performance
