文献类型：期刊文献

中文题名：去除木质素木材/聚甲基丙烯酸甲酯复合材料制备及性能研究

英文题名：Preparation and Properties of Lignin-removed Woods/Poly(Methyl Methacrylate)Composites

作者：徐富成[1,2] 李梅[1,2] 夏建陵[1,2] 许利娜[1,2] 丁海阳[1,2,3] 李守海[1,2,3]

第一作者：徐富成

机构：[1]中国林业科学研究院林产化学工业研究所/江苏省生物质能源与材料重点实验室/国家林业和草原局林产化学工程重点实验室/林木生物质低碳高效利用国家工程研究中心,江苏南京210042;[2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037;[3]中国林业科学研究院林业新技术研究所,北京100091

年份：2022

卷号：42

期号：6

起止页码：17-23

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家自然科学基金资助项目(31971598);江苏省生物质能源与材料重点实验室基本科研业务费(JSBEM-S-202007)。

语种：中文

中文关键词：去木质素木材;MMA浸渍改性;原位聚合;综合性能

外文关键词：delignified wood;MMA impregnation modification;in-situ polymerization;comprehensive performance

分类号：TQ35

摘要：使用甲基丙烯酸甲酯(MMA)浸渍得到去木质素木材(DW),经原位聚合制得去木质素木材/聚甲基丙烯酸甲酯(DW/PMMA)复合材料,并分析了复合材料DW/PMMA的各项性能。研究表明:不同木质素去除率对木材的各项性能均有较大的影响,且随着木质素去除率的增大,影响更加显著。相比于未处理木材/PMMA,复合材料DW/PMMA的密度增大,尤其是高木质素去除率木材(H-DW)制备得到的复合材料的密度可达到1.15 g/cm^(3),接近纯PMMA的密度。与DW相比,DW/PMMA具有更低的体积吸湿和吸水膨胀系数,这表明MMA的浸渍有效改善了DW的尺寸稳定性。动态热机械分析表明:PMMA的填充有效增加了所制备复合材料的刚性。制备的DW/PMMA复合材料具有优异的尺寸稳定性和力学性能,其中,MMA浸渍低木质素去除率木材(L-DW)后得到的L-DW/PMMA的抗弯强度达122.6 MPa,抗弯模量达10302.41 MPa,压缩模量达5492.14 MPa,这比未处理木材/PMMA的性能更优异。
The delignified wood(DW)was impregnated by methyl methacrylate(MMA)to obtain lignin-removed wood/poly(methyl methacrylate)(DW/PMMA)composite material through in-situ polymerization.The properties of DW/PMMA composite materials were investigated.The results showed that the removal ratio of different lignin had a greater impact on the properties of wood,and the impact was more significant with the increasing removal ratio of lignin.The density of DW/PMMA composite was significantly higher than that of non-impregnated wood.Especially when the lignin removal ratio reached a high level(H-DW),the density of the composite material could reach 1.15 g/cm^(3),which was close to that of pure PMMA.Compared with DW,DW/PMMA had lower volumetric moisture absorption and water absorption expansion coefficient,and incremental volumetric expansion resistance,which indicated that the impregnation of MMA effectively improved the dimensional stability of DW.The DW/PMMA exhibited better mechanical property than that of the untreated wood/PMMA.Dynamic thermomechanical thermal analysis showed that the filling of PMMA effectively increased the rigidity of the prepared composite material.The DW/PMMA composites prepared in this study had excellent dimensional stability and mechanical properties.Among them,the bending strength of L-DW/PMMA impregnated with low lignin removal rate wood(L-DW)was 122.6 MPa,the bending modulus was 10302.41 MPa,and the compression modulus was 5492.14 MPa,which was more excellent than that of the untreated wood/PMMA.