基于柚木废弃物纳米纤丝化木质纤维素体系的高机械性能生物质材料构建  

Fabrication of Biomass Materials with High Mechanical Properties Based on Teak Waste Nanofibrillatedcellulose

作　　者：杨玉山 沈华杰 邱坚 Yang Yushan;Shen Huajie;Qiu Jian(College of Materials Science and Engineering,Southwest Forestry University,Kunming Yunnan 650233,China)

机构地区：[1]西南林业大学材料科学与工程学院,云南昆明650233

出　　处：《西南林业大学学报（自然科学）》2020年第6期146-152,共7页Journal of Southwest Forestry University：Natural Sciences

基　　金：云教育厅重点项目(2019Y0117)资助;国家重点研发计划项目(2016YFD0600702)资助。

摘　　要：以柚木加工剩余物纤维为原料,通过初步粉碎后用胶体磨机械胶磨,无胶热压得到高机械性能生物质材料。结果表明:柚木废弃物原料通过机械热胶磨后,木纤维会分层分支且无胶热压后呈层状结构;木质纤维素之间由于羟基能够有效的交联在一起,增加其表面羟基的接触面积;生物质材料的剖面密度中间分布均匀且峰值和谷值之比约为1.16∶1;其静曲强度、弹性模量、内结合强度分别为115.27、10797.43、0.973 MPa,分别是素材纤维材料的5.1、2.5、4.5倍;同时还表现出一定的尺寸稳定性,及吸水厚度膨胀率仅为5.77%,比柚木废弃物原木质纤维材料降低了76.88%。生物质材料的剖面密度、静曲强度、弹性模量、内结合强度以及吸水厚度膨胀率均优于柚木废弃物原木质纤维材料。The teak processing residual fiber was used as the raw material,after preliminary pulverization and mechanically ground by a colloid mill,then the biomass materials with high mechanical properties were obtained by the binderless hot-press method.The findings indicated that the original teak waste fiber was laminated by the grinding and the composite material appeared layered structure after the binderless hot-pressing.Hydroxyl groups increase the cross-linking between nanofibrillatedcellulose,increase the contact area of surface hydroxyl groups.The ratio of peak density to valley value of teak waste nanofibrillatedcellulose is about 1.16∶1.The static bending strength(MOR),elastic modulus(MOE)and internal bonding strength(IB)of forest biomass materials were 115.27 MPa,10797.43 MPa and 0.973 MPa,which are 5.1 times,2.5 times and 4.5 times higher than that of teak waste fiber material,respectively.Meanwhile,the swelling value of thickness after water absorption was only 5.77%,which is 76.88%lower than the teak waste fiber material,demonstrating the dimensional stability.The profile density,MOR,MOE,IB and TS of forest biomass materials are superior to teak waste fiber material.

关 键 词：柚木废弃物 纳米纤丝化木质纤维素 生物质材料 剖面密度 机械性能 

分 类 号：S216[农业科学—农业机械化工程]