Highly Stable Wood Material with Low Resin Consumption via Vapor Phase Furfurylation in Cell Walls,ACS Sustainable Chemistry & Engineering

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Highly Stable Wood Material with Low Resin Consumption via Vapor Phase Furfurylation in Cell Walls
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-08-31 , DOI: 10.1021/acssuschemeng.0c03172
Minghui Liu _{1,

2} , Fei Guo ₃ , Hankun Wang _{1,

2} , Wenting Ren _{1,

2} , Mengdan Cao _{1,

2} , Yan Yu _{1,

3}

Affiliation

Wood and wood-based products have the problem of dimensional instability caused by changes in moisture content. Furfurylation modification is an environmentally friendly approach for wood stabilization. However, it normally adopts a traditional liquid phase vacuum and pressure impregnation (VPI) process, which has the inherent shortcomings of huge modifier consumption, wood drying defects after impregnation, and troublesome disposal of waste liquor. In this study, a novel process, vapor phase furfurylation (VPF), was for the first time applied to wood, leading to superstable wood material (ASE > 80%) with low furfuryl alcohol (FA) resin loading (weight percentage gain <15%). This process totally avoids invalid deposition of FA resin in the cell cavities of modified wood and meanwhile ensures the furfurylation of wood cell walls, as demonstrated by scanning electron microscopy (SEM) and nanoindentation. Furthermore, the distribution of FA resin in wood with the VPF process was evaluated with dynamic vapor sorption (DVS) and imaging FT-IR. Our study demonstrated a VPF process that has the potential to produce functionally gradient furfurylated wood with high dimensional stability at a low production cost. Furthermore, VPF at 115 °C for a duration of 40 h with a maleic anhydride (MA) concentration of 4.5% was proposed as an optimized process based on orthogonal experimental design and range analysis.

中文翻译：

通过细胞壁气相汽化使树脂消耗少的高度稳定的木材

木材和木质产品具有水分含量变化引起的尺寸不稳定性问题。糠醛改性是一种用于木材稳定化的环保方法。但是，它通常采用传统的液相真空和压力浸渍（VPI）工艺，其固有的缺点是改性剂消耗量大，浸渍后木材干燥缺陷以及废液处理麻烦。在这项研究中，首次将新型工艺气相糠醛化（VPF）应用于木材，从而导致了低糠醇（FA）树脂负载（重量百分比增加<15）的超稳定木材（ASE> 80％）％）。此过程完全避免了FA树脂在改性木材的孔腔中的无效沉积，同时确保了木质孔壁的糠醛化，如通过扫描电子显微镜（SEM）和纳米压痕所证明的。此外，通过动态气相吸附（DVS）和FT-IR成像评估了VPF工艺中FA树脂在木材中的分布。我们的研究表明，VPF工艺具有以较低的生产成本生产具有高尺寸稳定性的功能梯度糠醛化木材的潜力。此外，基于正交实验设计和范围分析，提出了在115°C下持续40 h，马来酸酐（MA）浓度为4.5％的VPF作为优化工艺。我们的研究表明，VPF工艺具有以较低的生产成本生产具有高尺寸稳定性的功能梯度糠醛化木材的潜力。此外，基于正交实验设计和范围分析，提出了在115°C下持续40 h，马来酸酐（MA）浓度为4.5％的VPF作为优化工艺。我们的研究表明，VPF工艺具有以较低的生产成本生产具有高尺寸稳定性的功能梯度糠醛化木材的潜力。此外，基于正交实验设计和范围分析，提出了在115°C下持续40 h，马来酸酐（MA）浓度为4.5％的VPF作为优化工艺。

更新日期：2020-09-21

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