微波预处理和MMA浸渍相结合，开发高性能木塑复合材料
Combined Microwave Pretreatment and MMA Impregnation for the Development of High-Performance Wood-Polymer Composites.
摘要(中文译文)
通过单体浸渍制备的木材-聚合物复合材料（WPCs）作为提高木材材料耐久性和性能的策略，日益受到关注。然而，某些木材树种的渗透性有限，往往制约了浸渍处理的效果。本研究探讨了微波（MW）预处理作为一种干燥和微观结构改性步骤，以增强甲基丙烯酸甲酯（MMA）在海松（）心材试件中的浸渍和原位聚合。木材试件在真空-压力浸渍MMA并随后热聚合之前，接受了700 W、5 min循环的MW处理。扫描电子显微镜和可处理性参数证实，MW预处理通过产生微裂纹和改善单体渗透提高了木材的可浸渍性，从而带来更高的聚合物保留率和更高的增重百分比。因此，MW+MMA联合处理使聚甲基丙烯酸甲酯在木材结构内的分布更加均匀。改性试件表现出吸水率的大幅降低和研究各组中最高的拒水效率，而尺寸稳定性改善程度较小。此外，联合处理显著提高了抗弯强度和刚度，表明通过聚合物负载有效增强了木材结构。这些结果表明，MW预处理是提高海松心材可处理性和增强MMA基WPCs性能的有效策略。
Abstract
Wood-polymer composites (WPCs) produced through monomer impregnation have attracted increasing interest as a strategy to improve the durability and performance of wood materials. However, the limited permeability of certain wood species often restricts the effectiveness of impregnation treatments. This study investigates the use of microwave (MW) pretreatment as a drying and microstructural modification step to enhance methyl methacrylate (MMA) impregnation and in situ polymerization in maritime pine () heartwood specimens. Wood specimens were subjected to MW treatment of 700 W and 5 min cycles prior to vacuum-pressure impregnation with MMA and subsequent thermal polymerization. Scanning electron microscopy and treatability parameters confirmed that MW pretreatment increased wood impregnability by generating microcracks and improving monomer penetration, thereby resulting in higher polymer retention and a higher weight percentage gain. As a result, the combined MW+MMA treatment produced a more homogeneous distribution of polymethyl methacrylate within the wood structure. The modified specimens showed a substantial reduction in water absorption and the highest water repellence efficiency among the studied groups, while dimensional stability improved to a lesser extent. In addition, the combined treatment significantly increased bending strength and stiffness, indicating an effective reinforcement of the wood structure through polymer loading. These results demonstrate that MW pretreatment is an efficient strategy to improve the treatability of maritime pine heartwood and to enhance the performance of MMA-based WPCs.
如何引用
AMA
Fernando Júnior Resende Mascarenhas, André Luis Christoforo, Rogério Manuel Santos Simões, Alfredo Manuel Pereira Geraldes Dias, André Eduardo Palos Cunha, Francisco Antonio Rocco Lahr. Combined Microwave Pretreatment and MMA Impregnation for the Development of High-Performance Wood-Polymer Composites.. Polymers. 2026; doi:10.3390/polym18101185.
APA
Fernando Júnior Resende Mascarenhas, André Luis Christoforo, Rogério Manuel Santos Simões, Alfredo Manuel Pereira Geraldes Dias, André Eduardo Palos Cunha, Francisco Antonio Rocco Lahr (2026). Combined Microwave Pretreatment and MMA Impregnation for the Development of High-Performance Wood-Polymer Composites.. Polymers. https://doi.org/10.3390/polym18101185
GB/T 7714
Fernando Júnior Resende Mascarenhas, André Luis Christoforo, Rogério Manuel Santos Simões, Alfredo Manuel Pereira Geraldes Dias, André Eduardo Palos Cunha, Francisco Antonio Rocco Lahr. Combined Microwave Pretreatment and MMA Impregnation for the Development of High-Performance Wood-Polymer Composites.[J]. Polymers, 2026 doi:10.3390/polym18101185.
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