摘要
选用PUR木材层压胶,设计"刨光锯材-超高分子量聚乙烯(UHMWPE)纤维-单板"3层结构木质复合材,探索研究了UHMWPE纤维增强对木材抗弯性能、剪切性能以及单板厚度对其增强效果影响,并利用红外光谱(FT-IR)对脱粘纤维进行表征,进而对UHMWPE纤维增强机理进行了分析。结果表明,PUR木材层压胶可用于UHMWPE纤维/木材的复合,UHMWPE纤维增强明显改变了木材破坏过程和破坏形貌,提高了木材的承载性能,同时UHMWPE纤维增强效果与单板厚度密切相关。UHMWPE纤维的加入降低了胶合界面的剪切性能。
In order to research whether ultra high molecular weight polyethylene (UHMWPE)fiber could be used in wood-based composite,three layer structure of wood composite materials from planed timber-UHM-WPE fiber-veneer was designed and prepared,PUR was selected as adhesive for this structure.The influences of UHMWPE fiber and veneer thickness composited with lumber on bending performance and ILSS of lumber were examined.The chemical constituents of deboning fibers were characterized by infrared spectroscopy (FT-IR).The mechanism of lumber heightened was discussed.The results showed that PUR could be used in UH-MWPE/lumber composite;UHMWPE fiber obviously changed the wood failure process and failure morpholo-gy,and improved the bearing capacity of wood;the effect reinforced by UHMWPE fiber was closely related to the thickness of veneer.Reinforced effect of UHMWPE fiber much affects the shear performance of bonding in-terface.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第18期18018-18021,18026,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(31070487)
