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  

Preparation and Properties of Lignin-removed Woods/Poly(Methyl Methacrylate)Composites

作　　者：徐富成 李梅[1,2] 夏建陵[1,2] 许利娜[1,2] 丁海阳 李守海[1,2,3] XU Fucheng;LI Mei;XIA Jianling;XU Lina;DING Haiyang;LI Shouhai(Institute of Chemical Industry of Forest Products,CAF/Key Lab.of Biomass Energy and Material,Jiangsu Province/Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration/National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Nanjing 210042,China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China;Research Institute of Forestry New Technology,CAF,Beijing 100091,China)

机构地区：[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

出　　处：《林产化学与工业》2022年第6期17-23,共7页Chemistry and Industry of Forest Products

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)。

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.

关 键 词：去木质素木材 MMA浸渍改性 原位聚合 综合性能 

分 类 号：TQ35[化学工程]