CAJ | 학술논문

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。
선용 PUR 목재층압효,설계“포광거재-초고분자량취을희(UHMWPE)섬유-단판”3층결구목질복합재,탐색연구료 UHMWPE 섬유증강대목재항만성능、전절성능이급단판후도대기증강효과영향,병이용홍외광보(FT-IR)대탈점섬유진행표정,진이대 UHMWPE 섬유증강궤리진행료분석。결과표명, PUR 목재층압효가용우 UHMWPE 섬유/목재적복합,UHMWPE섬유증강명현개변료목재파배과정화파배형모,제고료목재적승재성능,동시 UHMWPE섬유증강효과여단판후도밀절상관。UHMWPE 섬유적가입강저료효합계면적전절성능。
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.