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Papadopoulou E, Chrysafi I, Karidi K, Mitani A, Bikiaris DN. Particleboards with Recycled Material from Hemp-Based Panels. MATERIALS (BASEL, SWITZERLAND) 2023; 17:139. [PMID: 38203991 PMCID: PMC10780057 DOI: 10.3390/ma17010139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024]
Abstract
This research addresses the current need for sustainable solutions in the construction and furniture industries, with a focus on environmentally friendly particleboard. Particleboards were made from a mixture of virgin wood chips and hemp shives, which were then mechanically recycled and used to make new lightweight particleboards. Phenol-formaldehyde resin with 25% w/w phenol replacement by soybean flour (PFS) was used as the binder for the lignocellulosic materials. Laboratory analyses determined the resin properties, and FTIR confirmed the structure of the experimental PFS resin. The thermal properties of all the resins were evaluated using thermogravimetric analysis (TGA). The panels were manufactured using industrial simulation and tested for mechanical and physical properties in accordance with European standards. The FTIR study confirmed good adhesion, and the TGA showed improved thermal stability for the recycled biomass panels compared to virgin biomass panels. The study concludes that lightweight particleboards can be successfully produced from recycled hemp shive-based panels, providing a sustainable alternative to traditional materials in the construction industry.
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Affiliation(s)
- Electra Papadopoulou
- CHIMAR HELLAS S.A., 15 Km National Road, Thessaloniki—Polygyros, 570 01 Thermi, Greece;
| | - Iouliana Chrysafi
- Laboratory of Advanced Materials and Devices, Department of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
| | - Konstantina Karidi
- CHIMAR HELLAS S.A., 15 Km National Road, Thessaloniki—Polygyros, 570 01 Thermi, Greece;
| | - Andromachi Mitani
- Department of Forestry, Wood Sciences and Design, University of Thessaly, V. Griva nr.11, 431 00 Karditsa, Greece;
| | - Dimitrios N. Bikiaris
- Laboratory of Polymer and Colors Chemistry and Technology, Department of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
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2
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da Silveira PHPM, dos Santos MCC, Chaves YS, Ribeiro MP, Marchi BZ, Monteiro SN, Gomes AV, Tapanes NDLCO, Pereira PSDC, Bastos DC. Characterization of Thermo-Mechanical and Chemical Properties of Polypropylene/Hemp Fiber Biocomposites: Impact of Maleic Anhydride Compatibilizer and Fiber Content. Polymers (Basel) 2023; 15:3271. [PMID: 37571165 PMCID: PMC10422450 DOI: 10.3390/polym15153271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 07/26/2023] [Accepted: 07/29/2023] [Indexed: 08/13/2023] Open
Abstract
This article presents a comprehensive study on the physical, mechanical, thermal, and chemical properties of polypropylene (PP) composites reinforced with hemp fibers (HF) and compatibilized with maleic anhydride (MAPP). The composites were processed using a twin-screw extruder, followed by hot compression at 190 °C. Subsequently, the composites were analyzed using Izod impact and Shore D hardness tests to evaluate their mechanical properties. Thermal properties were investigated through differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), while X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) were employed to study their chemical properties. Additionally, a statistical analysis was conducted to compare the average results of the impact and hardness tests. XRD analysis revealed that the addition of HF and MAPP led to the disappearance of peaks corresponding to the beta phase in pure PP. Hemp fibers exhibited an impressive crystallinity of 82.10%, surpassing other natural fibers, and had a significant molecular orientation angle (MFA) of 6.06°, making them highly desirable for engineering applications. The crystallite size was observed to be relatively large, at 32.49 nm. FTIR analysis demonstrated strong interactions between the fiber, compatibilizing agent, and polymer matrix. TGA tests showed that the addition of 5 and 10 wt.% MAPP resulted in complete degradation of the composites, similar to pure PP. DSC analyses indicated a reduction in crystallinity (Xc) due to the incorporation of HF and MAPP. Shore D hardness tests revealed an increase in hardness with the addition of 5 wt.% MAPP, while a steep decline in this property was observed with 10 wt.% MAPP. In terms of impact resistance, fractions of 3 and 5 wt.% MAPP in the composites exhibited improved performance compared to the pure polymer. Analysis of variance (ANOVA) was employed to ensure the statistical reliability of the mechanical test results. This comprehensive study sheds light on the diverse properties of PP composites reinforced with hemp fibers and compatibilized with MAPP, emphasizing their potential as sustainable materials for engineering applications. The results contribute to the understanding of the structural and functional aspects of these composites, guiding future research and developments in the field.
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Affiliation(s)
- Pedro Henrique Poubel Mendonça da Silveira
- Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil; (Y.S.C.); (M.P.R.); (B.Z.M.); (S.N.M.); (A.V.G.)
| | - Mônica Cristina Celestino dos Santos
- Department of Materials, Rio de Janeiro State University, West Zone Campus —UERJ-ZO, Avenida, Manuel Caldeira de Alvarenga, 1203—Campo Grande, Rio de Janeiro 23070-200, Brazil; (M.C.C.d.S.); (N.d.L.C.O.T.); (P.S.d.C.P.); (D.C.B.)
| | - Yago Soares Chaves
- Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil; (Y.S.C.); (M.P.R.); (B.Z.M.); (S.N.M.); (A.V.G.)
| | - Matheus Pereira Ribeiro
- Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil; (Y.S.C.); (M.P.R.); (B.Z.M.); (S.N.M.); (A.V.G.)
| | - Belayne Zanini Marchi
- Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil; (Y.S.C.); (M.P.R.); (B.Z.M.); (S.N.M.); (A.V.G.)
| | - Sergio Neves Monteiro
- Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil; (Y.S.C.); (M.P.R.); (B.Z.M.); (S.N.M.); (A.V.G.)
| | - Alaelson Vieira Gomes
- Department of Materials Science, Military Institute of Engineering-IME, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, Brazil; (Y.S.C.); (M.P.R.); (B.Z.M.); (S.N.M.); (A.V.G.)
| | - Neyda de La Caridad Om Tapanes
- Department of Materials, Rio de Janeiro State University, West Zone Campus —UERJ-ZO, Avenida, Manuel Caldeira de Alvarenga, 1203—Campo Grande, Rio de Janeiro 23070-200, Brazil; (M.C.C.d.S.); (N.d.L.C.O.T.); (P.S.d.C.P.); (D.C.B.)
| | - Patricia Soares da Costa Pereira
- Department of Materials, Rio de Janeiro State University, West Zone Campus —UERJ-ZO, Avenida, Manuel Caldeira de Alvarenga, 1203—Campo Grande, Rio de Janeiro 23070-200, Brazil; (M.C.C.d.S.); (N.d.L.C.O.T.); (P.S.d.C.P.); (D.C.B.)
| | - Daniele Cruz Bastos
- Department of Materials, Rio de Janeiro State University, West Zone Campus —UERJ-ZO, Avenida, Manuel Caldeira de Alvarenga, 1203—Campo Grande, Rio de Janeiro 23070-200, Brazil; (M.C.C.d.S.); (N.d.L.C.O.T.); (P.S.d.C.P.); (D.C.B.)
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Jordà-Reolid M, Moreno V, Martínez-Garcia A, Covas JA, Gomez-Caturla J, Ivorra-Martinez J, Quiles-Carrillo L. Incorporation of Argan Shell Flour in a Biobased Polypropylene Matrix for the Development of High Environmentally Friendly Composites by Injection Molding. Polymers (Basel) 2023; 15:2743. [PMID: 37376389 DOI: 10.3390/polym15122743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/14/2023] [Accepted: 06/16/2023] [Indexed: 06/29/2023] Open
Abstract
In this study, a new composite material is developed using a semi bio-based polypropylene (bioPP) and micronized argan shell (MAS) byproducts. To improve the interaction between the filler and the polymer matrix, a compatibilizer, PP-g-MA, is used. The samples are prepared using a co-rotating twin extruder followed by an injection molding process. The addition of the MAS filler improves the mechanical properties of the bioPP, as evidenced by an increase in tensile strength from 18.2 MPa to 20.8 MPa. The reinforcement is also observed in the thermomechanical properties, with an increased storage modulus. The thermal characterization and X-ray diffraction indicate that the addition of the filler leads to the formation of α structure crystals in the polymer matrix. However, the addition of a lignocellulosic filler also leads to an increased affinity for water. As a result, the water uptake of the composites increases, although it remains relatively low even after 14 weeks. The water contact angle is also reduced. The color of the composites changes to a color similar to wood. Overall, this study demonstrates the potential of using MAS byproducts to improve their mechanical properties. However, the increased affinity with water should be taken into account in potential applications.
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Affiliation(s)
- María Jordà-Reolid
- Innovative Materials and Manufacturing Area-AIJU, Technological Institute for Children's Products & Leisure, 03440 Ibi, Spain
| | - Virginia Moreno
- Institute of Materials Technology (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell s/n, 03801 Alcoy, Spain
| | - Asunción Martínez-Garcia
- Innovative Materials and Manufacturing Area-AIJU, Technological Institute for Children's Products & Leisure, 03440 Ibi, Spain
| | - José A Covas
- Institute for Polymers and Composites, University of Minho, 4804-533 Guimaraes, Portugal
| | - Jaume Gomez-Caturla
- Institute of Materials Technology (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell s/n, 03801 Alcoy, Spain
| | - Juan Ivorra-Martinez
- Institute of Materials Technology (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell s/n, 03801 Alcoy, Spain
| | - Luis Quiles-Carrillo
- Institute of Materials Technology (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell s/n, 03801 Alcoy, Spain
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4
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Nukala SG, Kong I, Kakarla AB, Patel VI, Abuel-Naga H. Simulation of Wood Polymer Composites with Finite Element Analysis. Polymers (Basel) 2023; 15:polym15091977. [PMID: 37177125 PMCID: PMC10180933 DOI: 10.3390/polym15091977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/03/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023] Open
Abstract
Wood is a cellulosic material that is most abundantly available in nature. Wood has been extensively used as reinforcement in polymer composite materials. Wood polymer composite (WPC) is an environmentally friendly and sustainable material exploited in building and construction within the marine, packaging, housewares, aerospace, and automotive industries. However, the precision of testing equipment for finding the properties of WPCs becomes less feasible compared to experimental analysis due to a high degree of differences in the measurement of properties such as stress, strain and deformation. Thus, evaluating the mechanical properties of WPCs using finite element analysis (FEA) can aid in overcoming the inadequacies in measuring physical properties prior to experimental analyses. Furthermore, the prediction of mechanical properties using simulation tools has evolved to analyze novel material performance under various conditions. The current study aimed to examine the mechanical properties of saw dust-reinforced recycled polypropylene (rPP) through experimentation and FEA. A model was developed using SolidWorks, and simulation was performed in ANSYS to predict the mechanical properties of the WPCs. To validate the obtained results, the simulated static tension test results were confirmed with experimental tension tests, and both assessments were well in accordance with each other. Using FEA to predict material properties could be a cost-effective technique in studying new materials under varied load conditions.
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Affiliation(s)
- Satya Guha Nukala
- Department of Engineering, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
| | - Ing Kong
- Department of Engineering, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
| | - Akesh Babu Kakarla
- Department of Engineering, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
| | - Vipulkumar Ishvarbhai Patel
- Department of Engineering, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
| | - Hossam Abuel-Naga
- Department of Engineering, School of Computing, Engineering and Mathematical Sciences, La Trobe University, Melbourne, VIC 3086, Australia
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5
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Yano H, Fu W. Hemp: A Sustainable Plant with High Industrial Value in Food Processing. Foods 2023; 12:foods12030651. [PMID: 36766179 PMCID: PMC9913960 DOI: 10.3390/foods12030651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
In the era of SDGs, useful plants which provide valuable industrial outputs and at the same time pose less impact on the environment should be explored. Hemp seems one of the most relevant gluten-free crop plants to meet such requirements. Its high nutritional value is comparable to soy. Moreover, almost the whole body of the hemp plant has a wide array of utility: industrial production of food, fiber, and construction materials. In view of environmental sustainability, hemp requires less pesticides or water in cultivation compared to cotton, a representative fiber plant. This short review investigates hemp's sustainability as a plant as well as its utility value as a highly nutritional material in the food industry. Recent application research of hemp protein in food processing includes plant milk, emulsifiers, fortification of gluten-free bread, plant-based meat production, as well as membrane formation. These studies have revealed distinctive properties of hemp protein, especially in relation to disulfide (S-S)/sulfhydryl (-SH)-mediated interactions with protein from other sources. While its cultivation area and industrial use were limited for a while over confusion with marijuana, the market for industrial hemp is growing rapidly because it has been highly reevaluated in multiple areas of industry. Conclusively, with its sustainability as a plant as well as its distinctive useful property of the seed protein, hemp has promising value in the development of new foods.
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Râpă M, Spurcaciu BN, Ion RM, Grigorescu RM, Darie-Niță RN, Iancu L, Nicolae CA, Gabor AR, Matei E, Predescu C. Valorization of Polypropylene Waste in the Production of New Materials with Adequate Mechanical and Thermal Properties for Environmental Protection. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5978. [PMID: 36079359 PMCID: PMC9457047 DOI: 10.3390/ma15175978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 08/09/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Innovative composites based on polypropylene waste impurified cu HDPE (PPW) combined with two thermoplastic block-copolymers, namely styrene-butadiene-styrene (SBSBC) and styrene-isoprene-styrene (SISBC) block-copolymers, and up to 10 wt% nano-clay, were obtained by melt blending. SBSBC and SISBC with almost the same content of polystyrene (30 wt%) were synthesized by anionic sequential polymerization and used as compatibilizers for PPW. Optical microscopy evaluation of the PPW composites showed that the n-clay was encapsulated into the elastomer. Addition of n-clay, together with SBSBC or SISBC, increased the interphase surface of the components in the PPW composites and enhanced the superficial area/volume ratio, which led to a recycled material with improved performance. The data resulting from differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), mechanical evaluation, and dynamic mechanical analysis (DMA) revealed that PPW reinforcement with n-clay and styrene-diene block-copolymers allows the obtaining of composites with favorable mechanical and thermal properties, and excellent impact strength for potential engineering applications.
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Affiliation(s)
- Maria Râpă
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Bogdan Norocel Spurcaciu
- National Institute for Research & Development in Chemistry and Petrochemistry (ICECHIM), 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Rodica-Mariana Ion
- National Institute for Research & Development in Chemistry and Petrochemistry (ICECHIM), 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Ramona Marina Grigorescu
- National Institute for Research & Development in Chemistry and Petrochemistry (ICECHIM), 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Raluca Nicoleta Darie-Niță
- “Petru Poni” Institute of Macromolecular Chemistry, Physical Chemistry of Polymers Department, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Lorena Iancu
- National Institute for Research & Development in Chemistry and Petrochemistry (ICECHIM), 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Cristian-Andi Nicolae
- National Institute for Research & Development in Chemistry and Petrochemistry (ICECHIM), 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Augusta Raluca Gabor
- National Institute for Research & Development in Chemistry and Petrochemistry (ICECHIM), 202 Splaiul Independentei, 060021 Bucharest, Romania
| | - Ecaterina Matei
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Cristian Predescu
- Faculty of Materials Science and Engineering, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
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Nukala SG, Kong I, Kakarla AB, Tshai KY, Kong W. Preparation and Characterisation of Wood Polymer Composites Using Sustainable Raw Materials. Polymers (Basel) 2022; 14:polym14153183. [PMID: 35956698 PMCID: PMC9371043 DOI: 10.3390/polym14153183] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 07/27/2022] [Accepted: 07/29/2022] [Indexed: 12/24/2022] Open
Abstract
In recent years, composites consisting of polymers and cellulosic materials have attracted increasing research attention. Polypropylene (PP) is among the most common polymer types found in excavated waste from landfills. Moreover, wood waste generated from wood products manufacturing such as sawdust (SD) offers a good potential for the fabrication of composite materials, and it is readily available in the environment. In this paper, wood polymer composites (WPC) consisting of recycled PP (rPP) and (SD) were prepared and characterised. A range of mechanical properties, including tensile strength, flexural properties, creep and hardness were studied, along with morphology, thermal properties, water degradation and contact angle. The results showed that the mechanical and thermal properties of rPP increased with an increase in 40 wt% of the SD content. Furthermore, the SD content significantly influenced the water uptake of the composites. Time–temperature superposition (TTS) was applied to predict the long-term mechanical performance from short-term accelerated creep tests at a range of elevated temperatures. The short-term creep test showed efficient homogeneity between the fillers and matrix with increasing temperature. The produced wood polymer composites displayed a comparable physical property to virgin polymer and wood and could potentially be used for various structural materials.
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Affiliation(s)
- Satya Guha Nukala
- School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
| | - Ing Kong
- School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
- Correspondence:
| | - Akesh Babu Kakarla
- School of Computing, Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia
| | - Kim Yeow Tshai
- Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih 43500, Selangor, Malaysia
| | - Win Kong
- BASF Corporation, 1069 Biddle Avenue, Wyandotte, MI 48192, USA
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Dominguez-Candela I, Gomez-Caturla J, Cardona S, Lora-García J, Fombuena V. Novel compatibilizers and plasticizers developed from epoxidized and maleinized chia oil in composites based on PLA and chia seed flour. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Green Composites from Partially Bio-Based Poly(butylene succinate-co-adipate)-PBSA and Short Hemp Fibers with Itaconic Acid-Derived Compatibilizers and Plasticizers. Polymers (Basel) 2022; 14:polym14101968. [PMID: 35631851 PMCID: PMC9145613 DOI: 10.3390/polym14101968] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 11/16/2022] Open
Abstract
In this work, green composites have been developed and characterized using a bio-based polymeric matrix such as BioPBSA and the introduction of 30 wt.% short hemp fibers as a natural reinforcement to obtain materials with maximum environmental efficiency. In order to increase the interfacial adhesion between the matrix and the fiber to obtain better properties in the composites, a reactive extrusion process has been carried out. On the one hand, different additives derived from bio-based itaconic acid have been added to the BioPBSA/HEMP composite, such as dibutyl itaconate (DBI) and a copolymer of PBSA grafted with itaconic acid (PBSA-g-IA). On the other hand, a different copolymer of PBSA grafted with maleic anhydride (PBSA-g-MA) was also tested. The resulting composites have been processed by injection-molding to obtain different samples which were evaluated in terms of mechanical, thermal, chemical, dynamic-mechanical, morphological and wettability and color properties. In relation to the mechanical properties, the incorporation of hemp fibers resulted in an increase in the stiffness of the base polymer. The tensile modulus of pure BioPBSA increased from 281 MPa to 3482 MPa with 30% fiber. The addition of DBI shows a remarkable improvement in the ductility of the composites, while copolymers with IA and MA, generate mechanically balanced composites. In terms of thermal properties, the incorporation of hemp fiber and compatibilizing agents led to a reduction in thermal stability. However, from the point of view of thermomechanical properties, a clear increase in rigidity is achieved throughout the temperature range studied. As far as the color of the samples is concerned, the incorporation of hemp generates a typical color, while the incorporation of the compatibilizing agents does not modify this color excessively. Finally, the introduction of lignocellulosic fibers greatly affects water absorption and contact angle, although the use of additives helped to mitigate this effect.
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Łukawski D, Hochmańska-Kaniewska P, Janiszewska D, Wróblewski G, Patmore J, Lekawa-Raus A. Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene. Polymers (Basel) 2022; 14:polym14040745. [PMID: 35215657 PMCID: PMC8880308 DOI: 10.3390/polym14040745] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/01/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023] Open
Abstract
Carbon nanotubes (CNTs) and graphene, with their unique mechanical, electrical, thermal, optical, and wettability properties, are very effective fillers for many types of composites. Recently, a number of studies have shown that CNTs and graphene may be integrated into wood–plastic composites (WPCs) and natural-fibre-reinforced polymer composites (NFPCs) to improve the existing performance of the WPCs/NFPCs as well as enabling their use in completely new areas of engineering. The following review analyses the results of the studies presented to date, from which it can be seen that that inclusion of CNTs/graphene may indeed improve the mechanical properties of the WPCs/NFPCs, while increasing their thermal conductivity, making them electroconductive, more photostable, less sensitive to water absorption, less flammable, and more thermally stable. This study indicates that the composition and methods of manufacturing of hybrid WPCs/NFPCs vary significantly between the samples, with a consequent impact on the level of improvement of specific properties. This review also shows that the incorporation of CNTs/graphene may enable new applications of WPCs/NFPCs, such as solar thermal energy storage devices, electromagnetic shielding, antistatic packaging, sensors, and heaters. Finally, this paper recognises key challenges in the study area, and proposes future work.
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Affiliation(s)
- Damian Łukawski
- Institute of Physics, Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, Piotrowo 3, 61-139 Poznan, Poland;
| | - Patrycja Hochmańska-Kaniewska
- Wood Technology Centre, Łukasiewicz Research Network—Poznań Institute of Technology, ul. Winiarska 1, 60-654 Poznan, Poland; (P.H.-K.); (D.J.)
| | - Dominika Janiszewska
- Wood Technology Centre, Łukasiewicz Research Network—Poznań Institute of Technology, ul. Winiarska 1, 60-654 Poznan, Poland; (P.H.-K.); (D.J.)
| | - Grzegorz Wróblewski
- Faculty of Mechatronics, Warsaw University of Technology, ul. św. Andrzeja Boboli 8, 02-525 Warszawa, Poland;
| | - Jeff Patmore
- Pembroke College, University of Cambridge, Trumpington St., Cambridge CB2 1RF, UK;
| | - Agnieszka Lekawa-Raus
- Faculty of Mechatronics, Warsaw University of Technology, ul. św. Andrzeja Boboli 8, 02-525 Warszawa, Poland;
- Correspondence:
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11
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Rojas-Lema S, Arevalo J, Gomez-Caturla J, Garcia-Garcia D, Torres-Giner S. Peroxide-Induced Synthesis of Maleic Anhydride-Grafted Poly(butylene succinate) and Its Compatibilizing Effect on Poly(butylene succinate)/Pistachio Shell Flour Composites. Molecules 2021; 26:molecules26195927. [PMID: 34641470 PMCID: PMC8512837 DOI: 10.3390/molecules26195927] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/10/2021] [Accepted: 09/24/2021] [Indexed: 11/28/2022] Open
Abstract
Framing the Circular Bioeconomy, the use of reactive compatibilizers was applied in order to increase the interfacial adhesion and, hence, the physical properties and applications of green composites based on biopolymers and food waste derived lignocellulosic fillers. In this study, poly(butylene succinate) grafted with maleic anhydride (PBS-g-MAH) was successfully synthetized by a reactive melt-mixing process using poly(butylene succinate) (PBS) and maleic anhydride (MAH) that was induced with dicumyl peroxide (DCP) as a radical initiator and based on the formation of macroradicals derived from the hydrogen abstraction of the biopolymer backbone. Then, PBS-g-MAH was used as reactive compatibilizer for PBS filled with different contents of pistachio shell flour (PSF) during melt extrusion. As confirmed by Fourier transform infrared (FTIR), PBS-g-MAH acted as a bridge between the two composite phases since it was readily soluble in PBS and could successfully form new esters by reaction of its multiple MAH groups with the hydroxyl (–OH) groups present in cellulose or lignin of PSF and the end ones in PBS. The resultant compatibilized green composites were, thereafter, shaped by injection molding into 4-mm thick pieces with a wood-like color. Results showed significant increases in the mechanical and thermomechanical rigidity and hardness, meanwhile variations on the thermal stability were negligible. The enhancement observed was related to the good dispersion and the improved filler-matrix interfacial interactions achieved by PBS-g-MAH and also to the PSF nucleating effect that increased the PBS’s crystallinity. Furthermore, water uptake of the pieces progressively increased as a function of the filler content, whereas the disintegration in controlled compost soil was limited due to their large thickness.
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Affiliation(s)
- Sandra Rojas-Lema
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (J.A.); (J.G.-C.); (D.G.-G.)
- Correspondence: (S.R.-L.); (S.T.-G.)
| | - Jordi Arevalo
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (J.A.); (J.G.-C.); (D.G.-G.)
| | - Jaume Gomez-Caturla
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (J.A.); (J.G.-C.); (D.G.-G.)
| | - Daniel Garcia-Garcia
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (J.A.); (J.G.-C.); (D.G.-G.)
| | - Sergio Torres-Giner
- Research Institute of Food Engineering for Development (IIAD), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain
- Correspondence: (S.R.-L.); (S.T.-G.)
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Multi-Scale Study of the Small-Strain Damping Ratio of Fiber-Sand Composites. Polymers (Basel) 2021; 13:polym13152476. [PMID: 34372079 PMCID: PMC8347992 DOI: 10.3390/polym13152476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/16/2021] [Accepted: 07/22/2021] [Indexed: 11/17/2022] Open
Abstract
The use of polypropylene fibers as a geosynthetic in infrastructures is a promising ground treatment method with applications in the enhancement of the bearing capacity of foundations, slope rehabilitation, strengthening of backfills, as well as the improvement of the seismic behavior of geo-systems. Despite the large number of studies published in the literature investigating the properties of fiber-reinforced soils, less attention has been given in the evaluation of the dynamic properties of these composites, especially in examining damping characteristics and the influence of fiber inclusion and content. In the present study, the effect of polypropylene fiber inclusion on the small-strain damping ratio of sands with different gradations and various particle shapes was investigated through resonant column (macroscopic) experiments. The macroscopic test results suggested that the damping ratio of the mixtures tended to increase with increasing fiber content. Accordingly, a new expression was proposed which considers the influence of fiber content in the estimation of the small-strain damping of polypropylene fiber-sand mixtures and it can be complementary of damping modeling from small-to-medium strains based on previously developed expressions in the regime of medium strains. Additional insights were attempted to be obtained on the energy dissipation and contribution of fibers of these composite materials by performing grain-scale tests which further supported the macroscopic experimental test results. It was also attempted to interpret, based on the grain-scale tests results, the influence of fiber inclusion in a wide spectrum of properties for fiber-reinforced sands providing some general inferences on the contribution of polypropylene fibers on the constitutive behavior of granular materials.
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Preparation and Properties of Wood Plastic Composites with Desirable Features Using Poplar and Five Recyclable Plastic Wastes. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11156838] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
This study evaluated the mechanical and hydrophobic properties of wood plastic composites (WPC) prepared by the hot molding approach incorporating five different recycled plastics and poplar flour. The WPC showed excellent tensile strength (36.9 MPa) and flexural strength (44.7 MPa) associated with good hydrophobicity, and the excellent properties of WPC could be due to the application of hot pressing which improved the amount of hydroxyl groups and reduced the crystallinity of WPC. The WPC also revealed a strong and hydrostable structure and negligible emission of formaldehyde during the preparation process. Overall, the WPC could be used to substitute traditional wood-based panels as potential furniture material, hence achieving sustainable utilization of plastic wastes.
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