Published: June 9, 2023

Wood-based panels are indispensable in many areas, such as the construction industry and furniture production. The intensified demand for renewable materials, rising wood prices increasing protection zones of forest areas make panel consider alternative raw materials. agricultural sector provides, at same time, large amounts sustainable lignocellulosic By-products can arise along entire production chain, i.e., during harvesting or further processing into food, but their potential has not yet been fully exploited. This thesis explored agro-industry feedstocks side streams materials manufacturing. A literature review on research residues a material provided an overview investigated alternatives performance final products. Most studies focused particleboard its mechanical physical properties. Often only up to 30% could be replaced by before properties decreased remarkably.This intensive characterisation barley husks (BH), oat (OH) wheat bran (WB). Husks protective surrounding cereal grain have anatomical leaf structure. Wheat is stream flour consists grain's outer layers. It was found that BH OH 70% 66% slightly lower holocellulose content than wooden (poplar, spruce), while hemicelluloses exceeding cellulose. Additionally, WB had very high lignin 43%. chemical composition, especially ash (5% BH, 6% OH) silicon occurrence husks’surfaces, reduced wettability, demonstrated low contact angle measurements. Micromechanical tests showed resist higher ultimate stress load WB, modulus elasticity (MOE) lower. MOE noticeably affected microfibril angle, which three four-times larger compared Furthermore, results particle lengths widths average, approximately half much extractive thermal stability BH. Therefore, suggested promising evaluated In experimental investigation, aspecial type, tubular particleboards. Although boards insulation particle-based ones, were considerably manufacturing method led poor density distribution. addition, feedstock starch, combination with microfibrillated cellulose (MFC) emulsifiable diphenylmethane diisocyanate (eMDI), adhesive system fibreboard starch modified dialdehyde (DAS) served backbone formulation 99.5% bio-based using 1% MFC 4% eMDI based DAS, excellent water resistance fibreboards. Especially, internal bond values even exceeded those obtained manufactured commercial formaldehyde-based adhesive. application process should optimized future since DAS applied powder form, long press times necessary because required high-water content. DAS-based used particleboards, where challenges practical implementation encountered. severely shortened molecule reacted proteins OH, from temperatures 160°C, it accelerating degradation bonding capacity Finally, this deeper knowledge husked-based materials' context they possible challenging wood. Further investigations improve interfacial adhesion there spective order produce meet current requirements. investigation opened path adhesives independence formaldehyde systems. But subsequent must convert sprayable industrial integration

Language: Английский