Zvirgzds Kristaps, Kirilovs Edgars, Kukle Silvija, Zotova Inga, Gudro Ilze, Gross Uldis
Faculty of Materials Science and Applied Chemistry, Institute of Design Technologies, Riga Technical University, LV-1658 Riga, Latvia.
Department of Information Technologies, Latvia University of Life Sciences and Technologies, LV-3001 Jelgava, Latvia.
Materials (Basel). 2023 Jul 28;16(15):5316. doi: 10.3390/ma16155316.
In this research, agricultural residue of seed hemp variety "Adzelvieši" was used to create hemp particleboard samples. Hemp was grown in three experimental fields where it was observed that after seed harvesting, 3.5 tonnes of hemp stems per hectare remained. The plants were processed with milling, cutting, and sieving equipment. Moisture content and particle size distribution were observed throughout raw material processing. Hemp boards were produced using the cold pressing method with 10% urea formaldehyde resin as the binder. The boards were made as 20 mm thick single-layer parts with a density range of 220 ± 30 kg/m and porosity of 86%. Board structural analysis was performed using optical microscopy and scanning electron microscopy methods. Mechanical strength was determined by performing bending strength, internal bond strength, and screw withdrawal tests. The thermal conductivity reached 0.047 ± 0.008 W/(mK). The results were compared with industrially produced hemp shive boards and materials in the developmental or production stage. The feasibility for the experimental production cycle proposed in the study is discussed.
在本研究中，使用大麻品种“Adzelvieši”的农业残余物制作大麻刨花板样本。大麻种植于三个试验田，在那里观察到种子收获后，每公顷仍有3.5吨大麻茎杆。使用研磨、切割和筛分设备对植株进行加工。在整个原材料加工过程中观察水分含量和粒度分布。使用10%脲醛树脂作为粘合剂，通过冷压法生产大麻板。这些板材制成20毫米厚的单层部件，密度范围为220±30千克/立方米，孔隙率为86%。使用光学显微镜和扫描电子显微镜方法进行板材结构分析。通过进行抗弯强度、内结合强度和螺钉拔出试验来测定机械强度。热导率达到0.047±0.008瓦/（米·开尔文）。将结果与工业生产的大麻碎料板以及处于研发或生产阶段的材料进行比较。讨论了该研究中提出的实验生产周期的可行性。
