Rimkienė Aurelija, Kairytė Agnė, Vėjelis Sigitas, Kremensas Arūnas, Vaitkus Saulius, Šeputytė-Jucikė Jurga
Building Materials Institute, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenu str. 28, LT-08217 Vilnius, Lithuania.
Materials (Basel). 2024 Aug 17;17(16):4087. doi: 10.3390/ma17164087.
This research aims to find suitable processing methods that allow the reuse of wood waste to produce wood waste-based engineered wood logs for construction that meet the strength requirements for structural timber for sawn structural softwood. Three types of wood waste were examined: wood packaging waste (W), waste from the construction and furniture industry (PLY), and door manufacturing waste (DW). The wood waste was additionally crushed and sieved, and the granulometric composition and shape of the particles were evaluated. The microstructure of the surface of the wood waste particles was also analysed. A three-component biopolyurethane adhesive was used to bind wood waste particles. An analysis of the contact zones between the particles and biopolyurethane was performed, and the adhesion efficiency of their surfaces was evaluated. Analysis was performed using tensile tests, and the formation of contact zones was analysed with a scanning electron microscope. The wood particles were chemically treated with sodium carbonate, calcium hypochlorite, and peroxide to increase the efficiency of the contact zones between the particles and the biopolyurethane adhesive. Chemical treatment made fillers up to 30% lighter and changed the tensile strength depending on the solution used. The tensile strength of engineered wood prepared from W and treated with sodium carbonate increased from 8331 to 12,702 kPa compared to untreated waste. Additionally, the compressive strength of engineered wood made of untreated and treated wood waste particles was determined to evaluate the influence of the wood particles on the strength characteristics.
本研究旨在找到合适的加工方法，以便将木材废料重新利用，生产出用于建筑的符合锯材结构软木的结构木材强度要求的木废料基工程木原木。研究了三种类型的木材废料：木材包装废料（W）、建筑和家具行业废料（PLY）以及门制造废料（DW）。对木材废料进行了额外的粉碎和筛分，并评估了颗粒的粒度组成和形状。还分析了木材废料颗粒表面的微观结构。使用一种三组分生物聚氨酯粘合剂来粘结木材废料颗粒。对颗粒与生物聚氨酯之间的接触区域进行了分析，并评估了它们表面的粘附效率。通过拉伸试验进行分析，并用扫描电子显微镜分析接触区域的形成情况。用碳酸钠、次氯酸钙和过氧化物对木材颗粒进行化学处理，以提高颗粒与生物聚氨酯粘合剂之间接触区域的效率。化学处理使填料重量减轻了30%，并根据所使用的溶液改变了拉伸强度。与未处理的废料相比，由W制备并用碳酸钠处理的工程木的拉伸强度从8331 kPa提高到了12702 kPa。此外，测定了由未处理和处理过的木材废料颗粒制成的工程木的抗压强度，以评估木材颗粒对强度特性的影响。
