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Updated: Jun 23, 2025
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Fabrication and Design of Wood-Based High-Performance Composites
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基于组合试剂的细胞壁修饰,以提高木材的维度稳定性,具有高效率
Yuhan Qiu1, Chuanshuang Hu1, Jiewen Li1
1Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
Journal of agricultural and food chemistry
|June 20, 2024
概括
酸 (CA) 与γ-methacryloxypropyltrimethoxysilane (MPS) 结合,显著提高了木材的尺寸稳定性. 在MPS (C-MW) 之前用CA预处理木材,产生了最高的抗胀效率 (ASE),克服了单独MPS的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 木材科学 木材科学 木材科学
- 聚合物化学 聚合物化学
背景情况:
- γ-methacryloxypropyltrimethoxysilane (MPS) 提高了木材的尺寸稳定性,但存在一些局限性.
- MPS的低极性限制了纤维素中的键开放,限制了其有效性.
- 水可以重新打开键,从而降低仅仅通过MPS实现的稳定性.
研究的目的:
- 为了提高木材的尺寸稳定性,超越MPS的限制.
- 研究酸 (CA) 和MPS对木材修饰的协同作用.
- 使用CA和MPS优化木材修改策略.
主要方法:
- 使用MPS和CA单独和组合 (一步和两步) 的木材修饰.
- 优化CA和MPS度在5 wt%时.
- 在多个浸泡周期中对抗膨胀效率 (ASE) 和重量百分比增加 (WPG) 的评估.
- 使用扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDS) 的微结构分析.
主要成果:
- 单个修改 (MW,CW) 显示有限的ASE.
- 一步修改 (M/CW) 产生了较低的ASE (25.74%).
- 使用MPS首先进行的两步修改 (M-CW) 显示,在浸泡周期中,ASE降低了 (65.64%至51.20%).
- 使用CA首先 (C-MW) 的两步修改实现了最高的ASE (75.35%),在第一个周期后稳定在62.20%.
- 在C-MW中,SEM/EDS证实了细胞壁内的聚合物分布.
结论:
- 与单独使用MPS或其他组合相比,酸预处理 (C-MW) 显著提高了木材的尺寸稳定性.
- CA打开了纤维素的键,为MPS创造了更多的结合点,从而改善了聚合物透和稳定性.
- 通过协同化学修饰,C-MW方法提供了一种优越的策略,通过协同化学修饰来实现木材的高维稳定性.
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