TY - CHAP AU - Lendvai, László TI - Gyártási körülmények hatásának vizsgálata additív feldolgozásra szánt akrilnitril butadién sztirol alapanyagra T2 - Új Nemzeti Kiválóság Program 2023/2024 Tanulmánykötet PB - Széchenyi István Egyetem CY - Győr T3 - Új Nemzeti Kiválóság Program Tanulmánykötet, ISSN 2630-8134 PY - 2024 SP - 394 EP - 401 PG - 8 UR - https://m2.mtmt.hu/api/publication/35225212 ID - 35225212 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Drakopoulos, Stavros X. AU - Vryonis, Orestis AU - Špitalský, Zdenko AU - Peidayesh, Hamed AU - Lendvai, László TI - Thermoplastic Starch Processed under Various Manufacturing Conditions: Thermal and Electrical Properties JF - BIOMACROMOLECULES J2 - BIOMACROMOLECULES VL - 25 PY - 2024 IS - 9 SP - 5938 EP - 5948 PG - 11 SN - 1525-7797 DO - 10.1021/acs.biomac.4c00602 UR - https://m2.mtmt.hu/api/publication/35173430 ID - 35173430 LA - English DB - MTMT ER - TY - JOUR AU - Lendvai, László AU - Pegoretti, Alessandro TI - The rise of interdisciplinarity: A new era in polymer research? JF - EXPRESS POLYMER LETTERS J2 - EXPRESS POLYM LETT VL - 18 PY - 2024 IS - 10 SP - 962 EP - 963 PG - 2 SN - 1788-618X DO - 10.3144/expresspolymlett.2024.73 UR - https://m2.mtmt.hu/api/publication/35171781 ID - 35171781 LA - English DB - MTMT ER - TY - JOUR AU - Lendvai, László AU - Fekete, Imre AU - Rigotti, Daniele AU - Pegoretti, Alessandro TI - Experimental study on the effect of filament-extrusion rate on the structural, mechanical and thermal properties of material extrusion 3D-printed polylactic acid (PLA) products JF - PROGRESS IN ADDITIVE MANUFACTURING J2 - PROG ADDIT MANUF PY - 2024 PG - 11 SN - 2363-9512 DO - 10.1007/s40964-024-00646-5 UR - https://m2.mtmt.hu/api/publication/34849476 ID - 34849476 AB - Material extrusion (MEX), also commonly referred to as fused deposition modeling (FDM) or fused filament fabrication (FFF) is currently one of the most commonly used additive manufacturing techniques. The quality of the 3D-printed objects fabricated by MEX methods highly relies on various printing parameters, one of which is the so-called filament extrusion multiplier ( k ). In this study, 3D-printed parts were prepared by MEX technique during which the material feeding rate was adjusted by varying the extrusion multiplier in the range of 97–105% ( k = 0.97–1.05). The fabricated parts were tested for their geometrical, structural, mechanical, and thermal conductivity properties. Based on computed tomographic analysis and scanning electron microscopic images, increasing the k parameter resulted in smaller voids, along with gradually decreasing porosity (from 5.82 to 0.05%). Parallel to the decreasing defects, the thermal conductivity of the parts improved from 0.157 to 0.188 W/mK as determined by light-flash analysis technique. On the other hand, when k was set to ≥ 1.03 the geometrical accuracy declined, the size of the specimens considerably increased relative to the nominal values, especially in the X–Y directions due to excess material getting “squeezed” on the sides of the specimens. This latter phenomenon also resulted in the formation of a number of stress concentration sites, which manifested in the decrease of mechanical properties. Accordingly, the tensile, flexural, and impact strength of the samples improved up to k = 1.03; however, above that it dropped considerably. LA - English DB - MTMT ER - TY - JOUR AU - Jakab, Sándor Kálmán AU - Singh, Tej AU - Fekete, Imre AU - Lendvai, László TI - Agricultural by-product filled poly(lactic acid) biocomposites with enhanced biodegradability: The effect of flax seed meal and rapeseed straw JF - COMPOSITES PART C: OPEN ACCESS J2 - COMPOS PART C VL - 14 PY - 2024 PG - 11 SN - 2666-6820 DO - 10.1016/j.jcomc.2024.100464 UR - https://m2.mtmt.hu/api/publication/34827091 ID - 34827091 LA - English DB - MTMT ER - TY - JOUR AU - Lendvai, László AU - Singh, Tej AU - Ronkay, Ferenc György TI - Thermal, thermomechanical and structural properties of recycled polyethylene terephthalate (rPET)/waste marble dust composites JF - HELIYON J2 - HELIYON VL - 10 PY - 2024 IS - 3 PG - 13 SN - 2405-8440 DO - 10.1016/j.heliyon.2024.e25015 UR - https://m2.mtmt.hu/api/publication/34523954 ID - 34523954 LA - English DB - MTMT ER - TY - JOUR AU - Singh, Tej AU - Fekete, Imre AU - Jakab, Sándor Kálmán AU - Lendvai, László TI - Selection of straw waste reinforced sustainable polymer composite using a multi-criteria decision-making approach JF - BIOMASS CONVERSION AND BIOREFINERY J2 - BIOMASS CONV BIOREFINERY VL - 14 PY - 2024 SP - 21007 EP - 21017 PG - 11 SN - 2190-6815 DO - 10.1007/s13399-023-04132-w UR - https://m2.mtmt.hu/api/publication/33748423 ID - 33748423 AB - The valorization of straw waste as a sustainable and eco-friendly resource in polymer composites is critical for resource recycling and environmental preservation. Therefore, many research works are being carried out regarding the development of wheat straw-based polymer composites to identify the reinforcing potential of these sustainable resources. In this study, three different sizes of wheat straw fibers (60–120 mesh, 35–60 mesh, and 18–35 mesh) were used, and their different ratios (0, 2.5, 5, 10, and 20% by weight) were systematically investigated for the physical and mechanical properties of polypropylene-based sustainable composites. The results indicated that the evaluated composites’ properties are strongly dependent on the quantity and size of the utilized wheat straw. Therefore, a preference selection index was applied to rank the developed sustainable polymer composites to select the best composition. Various properties of the composite materials were considered as criteria for ranking the alternatives, namely tensile strength and modulus, flexural stress at conventional deflection and flexural modulus, impact strength, density, water absorption, material cost, and carbon footprint. The decision-making analysis suggests the alternative with wheat straw content of 20 wt.% (35–60 mesh size) dominating the performance by maximizing the beneficial criteria and minimizing the non-beneficial criteria, making it the most suitable alternative. This study will significantly help formulation designers to deal with the amount and size issues when developing polymeric composites. LA - English DB - MTMT ER - TY - JOUR AU - Lendvai, László AU - Singh, Tej AU - Rigotti, Daniele AU - Pegoretti, Alessandro TI - Thermally conductive and electrically resistive acrylonitrile butadiene styrene (ABS)/boron nitride composites: Optimal design using a multi-criteria decision-making approach JF - JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY J2 - J MATER RES TECHN VL - 26 PY - 2023 SP - 8776 EP - 8788 PG - 13 SN - 2238-7854 DO - 10.1016/j.jmrt.2023.09.165 UR - https://m2.mtmt.hu/api/publication/34150897 ID - 34150897 LA - English DB - MTMT ER - TY - JOUR AU - Lendvai, László AU - Rigotti, Daniele TI - Thermal and thermomechanical properties of boron nitride-filled acrylonitrile butadiene styrene (ABS) composites JF - ACTA TECHNICA JAURINENSIS J2 - ACTA TECH JAURIN VL - 16 PY - 2023 IS - 3 SP - 123 EP - 128 PG - 6 SN - 1789-6932 DO - 10.14513/actatechjaur.00706 UR - https://m2.mtmt.hu/api/publication/34074450 ID - 34074450 AB - The present study aims at investigating the effect of hexagonal boron nitride (hBN) nanoplatelets on the properties of acrylonitrile butadiene styrene (ABS) polymer. Composites containing 0-30 vol% hBN were prepared through batchwise melt compounding, which was followed by compression molding. Subsequently, the thermal and thermomechanical properties of the fabricated samples were investigated. The dynamic mechanical analysis (DMA) revealed that the storage modulus of the samples was markedly improved in the entire examined temperature range, while the glass transition temperature also gradually increased as a function of hBN content. According to the thermogravimetric analysis (TGA), the incorporated boron nitride particles enhanced the thermal stability of ABS composites, exhibiting a notably higher decomposition onset temperature. Additionally, the thermal conductivity of the ABS/hBN composites significantly increased by 570% when the hBN content was 30 vol%. LA - English DB - MTMT ER - TY - JOUR AU - Lendvai, László TI - Lignocellulosic agro-residue/polylactic acid (PLA) biocomposites: Rapeseed straw as a sustainable filler JF - CLEANER MATERIALS J2 - CLEANER MATERIALS VL - 9 PY - 2023 PG - 11 SN - 2772-3976 DO - 10.1016/j.clema.2023.100196 UR - https://m2.mtmt.hu/api/publication/34048360 ID - 34048360 LA - English DB - MTMT ER -