Wurm Sebastian, Scheer Alexa, Baumann Georg, Wagner Markus, Vitzthum Kevin, Spirk Stefan, Feist Florian
Vehicle Safety Institute, Graz University of Technology, Inffeldgasse 13/6, 8010 Graz, Austria.
Institute of Bioproducts and Paper Technology, Graz University of Technology, Inffeldgasse 23, 8010 Graz, Austria.
ACS Omega. 2024 Nov 20;9(48):47690-47698. doi: 10.1021/acsomega.4c07320. eCollection 2024 Dec 3.
In the pursuit of sustainable engineering solutions, material selection is increasingly directed toward resources that offer functional efficacy, economic feasibility, and minimal environmental impact. To replace environmentally damaging materials like aluminum with more sustainable alternatives like wood-based materials, it is essential to improve the durability and longevity of wood. This study explores the potential suitability of modified veneers as an outer protective layer for unmodified wooden load-bearing elements, providing a cost-effective and resource-efficient alternative to bulk modification. Unmodified, acetylated, furfurylated, and physically densified birch rotary-cut wood veneers were exposed to liquid chemical reagents (acids, base, solvents, and water) and characterized thereafter in tensile tests. The chemical resistance was evaluated based on the deterioration of tensile strength. Additionally, infinite focus microscopy, infrared spectroscopy, and contact angle measurements were performed to track morphological and chemical changes in the veneers. The results demonstrated that acetylation and furfurylation significantly enhanced chemical resistance against the tested reagents.
在追求可持续工程解决方案的过程中，材料选择越来越倾向于那些具有功能功效、经济可行性且对环境影响最小的资源。为了用木质材料等更可持续的替代品取代铝等对环境有害的材料，提高木材的耐久性和使用寿命至关重要。本研究探讨了改性单板作为未改性木质承重构件外层保护层的潜在适用性，为整体改性提供了一种经济高效且资源节约的替代方案。将未改性、乙酰化、糠醇化和物理致密化的桦木旋切单板暴露于液体化学试剂（酸、碱、溶剂和水）中，然后在拉伸试验中进行表征。基于拉伸强度的劣化评估耐化学性。此外，还进行了无限聚焦显微镜、红外光谱和接触角测量，以追踪单板的形态和化学变化。结果表明，乙酰化和糠醇化显著提高了对测试试剂的耐化学性。
