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林产化学与工业 ›› 2022, Vol. 42 ›› Issue (6): 17-23.doi: 10.3969/j.issn.0253-2417.2022.06.003

• 研究报告 • 上一篇    下一篇

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

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,*()   

  1. 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
  • 收稿日期:2021-10-13 出版日期:2022-12-28 发布日期:2023-01-07
  • 通讯作者: 李守海 E-mail:Xu-fucheng@126.com;lishouhai1979@163.com
  • 作者简介:李守海,研究员,硕士生导师,主要从事天然资源化学利用的研究;E-mail: lishouhai1979@163.com
    徐富成(1995—),男,江苏连云港人,硕士生,主要从事生物基高分子材料的研究;E-mail: Xu-fucheng@126.com
  • 基金资助:
    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)

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

Fucheng XU1,2(), Mei LI1,2, Jianling XIA1,2, Lina XU1,2, Haiyang DING1,2,3, Shouhai LI1,2,3,*()   

  1. 1. 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
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
    3. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
  • Received:2021-10-13 Online:2022-12-28 Published:2023-01-07
  • Contact: Shouhai LI E-mail:Xu-fucheng@126.com;lishouhai1979@163.com

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/cm3,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10 302.41 MPa,压缩模量达5 492.14 MPa,这比未处理木材/PMMA的性能更优异。

关键词: 去木质素木材, MMA浸渍改性, 原位聚合, 综合性能

Abstract:

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/cm3, 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 10 302.41 MPa, and the compression modulus was 5 492.14 MPa, which was more excellent than that of the untreated wood/PMMA.

Key words: delignified wood, MMA impregnation modification, in-situ polymerization, comprehensive performance

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