Laszlo Lendvai

Laszlo Lendvai
Széchenyi István University, Gyor · Department of Materials Science and Engineering

Ph.D.

About

28
Publications
4,452
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306
Citations
Introduction
Development of nanoparticle reinforced thermoplastic polymers. Biodegradable polymers and composites. Mechanical morphological and thermal characterization. Additive manufacturing (3D printing) of polymers.

Publications

Publications (28)
Article
A two-step melt blending procedure was used to produce binary systems composed of thermoplastic starch (TPS) and poly(butylene adipate-co-terephthalate) (PBAT). To improve the properties of the blends, two different layered silicates, viz. bentonite (BT) and organically modified montmorillonite (oMMT) were incorporated. First, TPS and its layered s...
Article
Thermoplastic starch (TPS), plasticized with glycerol and water, and its nanocomposites containing up to 7.5 parts per hundred resin (phr) pristine bentonite (BT) were prepared by melt compounding. Effects of the BT reinforcement and storage time on the morphology, water content and mechanical properties of the related TPS nanocomposites were inves...
Article
Full-text available
A novel melt compounding method-originally introduced for the preparation of nanocomposites-was adapted to produce polypropylene (PP) based blends toughened with up to 20 wt% natural rubber (NR). This water-assisted technique is based on batchwise melt mixing, where the additives are introduced as an aqueous dispersion into the matrix, drop by drop...
Article
Full-text available
In this study, the suitability of natural rubber (NR) toughened poly(lactic acid) (PLA)-based blends were investigated for additive manufacturing applications. Filaments for fused deposition modeling (FDM) were prepared with an NR concentration of 0 … 20 wt% using a twin-screw extruder. Subsequently, specimens were fabricated with a desktop 3D prin...
Article
Full-text available
The current paper presents the results of a study on the processing and characterization of waste marble powder-reinforced recycled polyethylene terephthalate (rPET) composites. Samples with up to 20 wt% marble dust (MD) content were produced with twin-screw extrusion followed by injection molding. Subsequently, the morphological and mechanical fea...
Article
Full-text available
Based on the criteria importance through inter-criteria correlation (CRITIC) and the multi-attributive border approximation area comparison (MABAC), a decision-making algorithm was developed to select the optimal biocomposite material according to several conflicting attributes. Poly(lactic acid) (PLA)-based binary biocomposites containing wood was...
Article
Full-text available
The present research work develops an evaluation method based on the hybrid entropy-simple additive weighting approach to select the best biocomposite material based on several potentially conflicting criteria. Poly(lactic acid) (PLA) biocomposites with varying proportions of wood waste (0, 2.5, 5, 7.5, and 10 by weight) was developed and evaluated...
Article
Full-text available
In our study, the effects of wood waste content (0, 2.5, 5, 7.5, and 10 wt.%) on thermal and dry sliding wear properties of poly(lactic acid) (PLA) biocomposites were investigated. The wear of developed composites was examined under dry contact conditions at different operating parameters, such as sliding velocity (1 m/s, 2 m/s, and 3 m/s) and norm...
Article
Full-text available
Designing excellent hip implant composite material with optimal physical, mechanical and wear properties is challenging. Improper hip implant composite design may result in a premature component and product failure. Therefore, a hybrid decision-making tool was proposed to select the optimal hip implant composite according to several criteria that a...
Article
Full-text available
The aim of this present work was to study the applicability of waste marble dust (MD) in poly(lactic acid) (PLA)-based composites. Samples containing up to 20 wt% waste MD were prepared via melt blending. The attention was focused on the investigation of mechanical, morphological, thermal properties and the wear resistance of the PLA/MD composites....
Article
The present work intended to investigate the effect of Dalbergia sissoo wood waste on physical, mechanical, and thermal properties of poly(lactic acid) (PLA)-based composites. The composite specimens, containing wood waste (2.5%, 5%, 7.5%, and 10% by weight) mixed with PLA granules, were prepared by melt compounding. It was found that increased woo...
Conference Paper
Full-text available
The aim of this present work was to study the toughening efficiency of natural rubber (NR) on various poly(lactic acid) (PLA) grades for 3D printing applications. For this purpose three different types of PLA with varying d-isomer content and average molecular weight were applied. Firstly, PLA-based filaments suitable for fused deposition modeling...
Article
Full-text available
The purpose of this work is to investigate the suitability of boehmite alumina (BA) reinforced poly(lactic acid) (PLA) for additive manufacturing with the fused filament fabrication method. PLA filaments with 0-10 wt.% BA content were produced via melt compounding using a twin-screw extruder. Dumbbell-shaped and prismatic specimens were manufacture...
Article
The growing need for sustainable technologies has attracted considerable interest in the synthesis of ecofriendly materials. This paper reports the anti-inflammatory and antibacterial activities of sustainable silver nanoparticles (AgNPs) fabricated using endophytic fungus extracted from a medicinal plant, Cassia fistula. Fourier transform-infrared...
Article
Full-text available
In this study polypropylene (PP) matrix-based boehmite alumina (BA) reinforced composites were prepared batchwise in an internal mixer. BA particles up to 10 wt.% were incorporated by 1. traditional melt mixing and 2. in a novel, Water-Assisted (WA) way, called fast evaporation mixing, during which BA was dispersed in PP with the use of an aqueous...
Article
Full-text available
A two-step compounding procedure was used to produce binary blends composed of poly(lactic acid) (PLA) and thermoplastic starch (TPS) with varying component ratios. Subsequently, three different chemical connectors were introduced in order to enhance the interfacial adhesion between the PLA and the TPS. Maleic anhydride, blocked isocyanate, and cha...
Article
Full-text available
Binary blends composed of polypropylene (PP) and natural rubber (NR) or carboxylated acrylonitrile butadiene rubber (XNBR) were produced in batch-type melt compounding process. The rubbers used as toughening agents were introduced into PP in up to 20 wt% in their dry and latex forms. Structure-property relationships of the blends were studied. Both...
Article
Full-text available
Boehmite is an aluminum oxyhydroxide [AlO(OH)] which is preferentially used as precursor for the production of (transition) aluminum oxides. Boehmite alumina (BA) nanoparticles are available in various morphologies due to versatile synthesis routes, which are briefly introduced. The peripheral hydroxyl groups of BA offer manifold functionalization...
Article
Thermoplastic starch (TPS)/bentonite nanocomposites containing up to 7.5 wt.% bentonite were prepared. Maize starch was plasticized with glycerol and water, in presence or absence of bentonite, in a twin-screw extruder. Mechanical, morphological and thermal properties of the TPS/bentonite nanocomposites were determined and discussed. Scanning elect...
Presentation
Full-text available
Thermoplastic starch composites attracted the scientific interest due to their abundance in nature and their potential applications. In the present study, thermoplastic starch composites reinforced with microfibrillated cellulose were prepared and their electrical behaviour was investigated. The specimens were prepared via twin-screw extruder, inte...
Poster
Full-text available
Starch is widely distributed in various plant organs as a storage carbohydrate and is also an ingredient of many foods. About 28% of the mass of a starch granule is amylose and the rest is amylopectin. In the present study, the electrical behavior of raw corn starch in powder form was investigated. Molecular dynamic simulations have been conducted...
Poster
Full-text available
Thermoplastic starch ''green'' composites attracted the scientific interest because of their abundance in nature and their potential applications in packaging industry due to their biodegradability. In the present study, thermoplastic starch composites reinforced with microcellulose or latex particles were prepared and their electrical behavior was...
Poster
Full-text available
Thermoplastic starch (TPS)/cellulose biocomposites attracted the scientific interest because of their biodegradability and their potential applications in packaging industry. In the present study, starch and cellulose in powder form and thermoplastic starch biocomposites reinforced with two different cellulose-length fibers and latex hybrids are in...
Article
In this study thermoplastic starch (TPS) matrix-based microfibrillated cellulose (MFC) reinforced microcomposites were prepared via extrusion compounding in one-step. Starch was plasticized with a combination of glycerol and water. The native starch/glycerol and the plasticized starch/water ratios were set for 4/1 and 6/1, respectively. Two differe...
Article
Water-assisted, or more generally liquid-mediated, melt compounding of nanocomposites is basically a combination of solution-assisted and traditional melt mixing methods. It is an emerging technique to overcome several disadvantages of the above two. Water or aqueous liquids with additives, do not work merely as temporary carrier materials of suita...
Poster
Full-text available
Thermoplastic starch/cellulose biocomposites attracted the scientific interest because of their biodegradability and their potential applications in packaging industry. In the present study, biomicrocomposites of thermoplastic starch with latex or/and cellulose microparticles were prepared via twin-screw extruder, internal mixer and compression mol...

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