Special Issue "Mechanical Properties of Biocomposites"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Biomaterials".

Deadline for manuscript submissions: 31 October 2021.

Special Issue Editors

Senior Assoc. Prof. Dr. Juan Carlos Del Real-Romero
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Guest Editor
Universidad Pontificia Comillas, ICAI School of Engineering, Institute for Research in Technology, Alberto Aguilera 23, 28015 Madrid, Spain
Interests: adhesives; composites; biomaterials; nanocomposites; surface treatment; mechanical characterization
Assoc. Prof. Dr. Eva Paz Jiménez
Website
Guest Editor
Universidad Pontificia Comillas, ICAI School of Engineering, Institute for Research in Technology, Alberto Aguilera 23, 28015 Madrid, Spain
Interests: biomaterials; bone cements; composite materials; nanocomposites; carbon based nanomaterials; mechanical characterization
Assoc. Prof. Dr. Juana Abenojar Buendia
Website
Guest Editor
Materials Science and Engineering Department, IAAB, Materials Performance Group, Universidad Carlos III de Madrid, Av. Universidad 30, 28911 Leganes, Madrid, Spain
Interests: composite materials; biocomposites; nanocomposites; adhesives; surface treatment; thermal characterization

Special Issue Information

Dear Colleagues,

Biocomposites contain bio‐based materials such as natural fibers or biopolymers. In recent times, these materials have attracted significant interest due to their advantages compared to other materials such as GRP or CFRP composites, including their minor environmental impact, better recyclability, and lower cost. Due to these characteristics, they have great potential for use in the transportation and construction sectors. The growing environmental consciousness has driven efforts to increase the mechanical performance of these new materials to extend their capabilities and applications.

This Special Issue aims to provide an overview of the recent advances in the mechanical performance of biocomposites. We welcome submissions related to the mechanical characterization of bio-based resins and natural fibers, fracture mechanics and fatigue behavior, testing and characterization methods, durability, and analytical and modeling studies of biocomposites. We also welcome review articles that describe the latest knowledge in the aforementioned fields.

 
Senior Assoc. Prof. Dr. Juan Carlos del Real-Romero
Assoc. Prof. Dr. Eva Paz Jiménez
Assoc. Prof. Dr. Juana Abenojar Buendia
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biocomposites
  • bio-based polymers
  • natural fibers
  • nanofibers
  • mechanical characterization
  • fracture
  • fatigue
  • durability

Published Papers (4 papers)

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Research

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Open AccessArticle
Study of Nano-Mechanical Performance of Pretreated Natural Fiber in LDPE Composite for Packaging Applications
Materials 2020, 13(21), 4977; https://doi.org/10.3390/ma13214977 - 05 Nov 2020
Abstract
In this work, the effects of chemical pretreatment and different fiber loadings on mechanical properties of the composites at the sub-micron scale were studied through nanoindentation. The composites were prepared by incorporating choline chloride (ChCl) pretreated rice husk waste (RHW) in low-density polyethylene [...] Read more.
In this work, the effects of chemical pretreatment and different fiber loadings on mechanical properties of the composites at the sub-micron scale were studied through nanoindentation. The composites were prepared by incorporating choline chloride (ChCl) pretreated rice husk waste (RHW) in low-density polyethylene (LDPE) using melt processing, followed by a thermal press technique. Nanoindentation experiments with quasi continuous stiffness mode (QCSM) were performed on the surface of produced composites with varying content of pretreated RHW (i.e., 10, 15, and 20 wt.%). Elastic modulus, hardness, and creep properties of fabricated composites were measured as a function of contact depth. The results confirmed the appreciable changes in hardness, elastic modulus, and creep rate of the composites. Compliance curves indicated that the composite having 20 wt.% of pretreated RHW loading was harder compared to that of the pure LDPE and other composite samples. The values of elastic modulus and hardness of the composite containing 20 wt.% pretreated RHW were increased by 4.1% and 24% as compared to that of the pure LDPE, respectively. The creep rate of 42.65 nm/s and change in depth of 650.42 nm were also noted for the composite with RHW loading of 20 wt.%, which showed the substantial effect of holding time at an applied peak load of 100 mN. We believe that the developed composite could be a promising biodegradable packaging material due to its good tribo-mechanical performance. Full article
(This article belongs to the Special Issue Mechanical Properties of Biocomposites)
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Open AccessArticle
Effect of APPT Treatment on Mechanical Properties and Durability of Green Composites with Woven Flax
Materials 2020, 13(21), 4762; https://doi.org/10.3390/ma13214762 - 25 Oct 2020
Abstract
Through this study, two different natural fibres green composites were characterised from the point of view of mechanical properties and durability. These green polymers allow manufacturing with a respectful life cycle due to their biodegradable or recyclable character. Composite materials were prepared in [...] Read more.
Through this study, two different natural fibres green composites were characterised from the point of view of mechanical properties and durability. These green polymers allow manufacturing with a respectful life cycle due to their biodegradable or recyclable character. Composite materials were prepared in a hot plates press with two biopolymeric matrices, green low density polyethylene (GPE) and polybutylene succinate (PBS). As reinforcement, Atmospheric Pressure Plasma Torch (APPT) treated and untreated unidirectional woven flax were used. Mechanical properties were evaluated by tensile tests and the adhesion between matrices and reinforcement by peeling tests. The durability of each composite was analysed by water absorption measurements, Fourier Transform Infrared Spectroscopy (FTIR) analysis and tensile tests, during several aging times, up to 60 days, under high temperature and humidity conditions. The influence of the Atmospheric Pressure Plasma Torch treatment (APPT) was evaluated in all studies. It was found that GPE composites present better durability against aging conditions than PBS materials, due to the tendency of polyester to hydrolyse compared to the good resistance to humidity of polyolefins. The adhesion between matrices and reinforcement improves with APPT treatment. This improvement is more evident by avoiding the absorption of water than in the mechanical properties results, where only a slightly improvement is shown. Full article
(This article belongs to the Special Issue Mechanical Properties of Biocomposites)
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Open AccessArticle
Effect of Process Orientation on the Mechanical Behavior and Piezoelectricity of Electroactive Paper
Materials 2020, 13(1), 204; https://doi.org/10.3390/ma13010204 - 03 Jan 2020
Cited by 2
Abstract
This paper reports the effect of process orientation on the mechanical behavior and piezoelectricity of electroactive paper (EAPap) made from natural cotton pulp. EAPap is fabricated by a casting and wet drawing of cellulose film after dissolving cotton with LiCl and DMAc solvent. [...] Read more.
This paper reports the effect of process orientation on the mechanical behavior and piezoelectricity of electroactive paper (EAPap) made from natural cotton pulp. EAPap is fabricated by a casting and wet drawing of cellulose film after dissolving cotton with LiCl and DMAc solvent. During the fabrication, permanent wrinkles, a possible factor for performance deterioration, were found in the films. Finite element method was introduced to identify the formation mechanism behind the wrinkles. The simulation results show that the wrinkles were caused by buckling and are inevitable under any conditions. The tensile and piezoelectric tests show that the orientation dependency of the stretched EAPap gives the anisotropic characteristics on both mechanical and piezoelectric properties. In this research, the anisotropic elastic moduli and Poisson’s ratios are reported. The piezoelectric charge constant of EAPap in the linear elastic is calculated. The piezoelectric charge constants of EAPap are associated with the alignment angle in the order of 45° > 0° > 90° due to the strong shear effect. The higher stretching ratio gives the higher piezoelectricity due to the alignment of the molecular chains and the microstructure in EAPap. The highest piezoelectric charge constant is found to be 12 pC/N at a stretching ratio of 1.6 and aligning angle of 45°. Full article
(This article belongs to the Special Issue Mechanical Properties of Biocomposites)
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Review

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Open AccessReview
Recent Progress in Hybrid Biocomposites: Mechanical Properties, Water Absorption, and Flame Retardancy
Materials 2020, 13(22), 5145; https://doi.org/10.3390/ma13225145 - 15 Nov 2020
Abstract
Bio-based composites are reinforced polymeric materials in which one of the matrix and reinforcement components or both are from bio-based origins. The biocomposite industry has recently drawn great attention for diverse applications, from household articles to automobiles. This is owing to their low [...] Read more.
Bio-based composites are reinforced polymeric materials in which one of the matrix and reinforcement components or both are from bio-based origins. The biocomposite industry has recently drawn great attention for diverse applications, from household articles to automobiles. This is owing to their low cost, biodegradability, being lightweight, availability, and environmental concerns over synthetic and nonrenewable materials derived from limited resources like fossil fuel. The focus has slowly shifted from traditional biocomposite systems, including thermoplastic polymers reinforced with natural fibers, to more advanced systems called hybrid biocomposites. Hybridization of bio-based fibers/matrices and synthetic ones offers a new strategy to overcome the shortcomings of purely natural fibers or matrices. By incorporating two or more reinforcement types into a single composite, it is possible to not only maintain the advantages of both types but also alleviate some disadvantages of one type of reinforcement by another one. This approach leads to improvement of the mechanical and physical properties of biocomposites for extensive applications. The present review article intends to provide a general overview of selecting the materials to manufacture hybrid biocomposite systems with improved strength properties, water, and burning resistance in recent years. Full article
(This article belongs to the Special Issue Mechanical Properties of Biocomposites)
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