New Frontiers of Natural Fibers and Their Composites

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 5693

Special Issue Editor


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Guest Editor
LEPAMAP Research Group, Department of Chemical Engineering, Agriculture and Food Technology, Universitat de Girona, Girona, Spain
Interests: biodegradable materials; biomaterials; natural fiber reinforced composites
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Special Issue Information

Dear Colleagues,

The Special Issue entitled “New Frontiers of Natural Fibers and Their Composites” is intended to give a point of view of the current situation of the research in the area of composites reinforced with fibers from natural resources, including research on the methodologies to produce and characterize natural fibers for such purposes. During the last few decades, there has been an increasing interest in the reinforcing of polymers derived from nonrenewable resources, with cellulosic and lignocellulosic fibers. The latest research lines open new horizons by also using polymer matrices from renewable resources and fibers in the nanoscale to produce totally renewable materials with improved properties.

In this way, original manuscripts exploring new methodologies to produce composites reinforced with natural fibers, fabrication of composites with natural occurring polymer matrices or derived from renewable resources, production of nanoscale cellulose to reinforce renewable polymer matrices, nanocomposites reinforced with cellulosic nanofibers/nanocrystals, and other nanostructured cellulosic resources are welcome. The studies can be structured as experimental works, to produce the fibers or the composites, theoretical studies of finite elements (production of final pieces), development of micromechanical studies of the produced composites materials or even life cycle assessment to determine the viability of the production of the materials. The Special Issue will be of interest for fiber producers, new developers of polymer matrices from renewable resources, and interdisciplinary teams and enterprises to produce new materials which are more respectful toward the environment.

Dr. José Alberto Méndez
Guest Editor

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Keywords

  • Naturally occurring polymers
  • Cellulosic fibers
  • Lingnocellulosic fibers
  • Composite materials reinforced with natural fibers
  • Nanoscale cellulose fibers
  • Characterization of polymer composites reinforced with renewable fibers
  • Micromechanics
  • Life cycle assessment related with totally renewable composites

Published Papers (2 papers)

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Research

14 pages, 4277 KiB  
Article
Assessment of Fiber Orientation on the Mechanical Properties of PA6/Cellulose Composite
by Pruthvi K. Sridhara and Fabiola Vilaseca
Appl. Sci. 2020, 10(16), 5565; https://doi.org/10.3390/app10165565 - 11 Aug 2020
Cited by 11 | Viewed by 2633
Abstract
Cellulose is being considered as a suitable renewable reinforcement for materials production. In particular, cellulose based composites are attracting global interest for their unique and intrinsic properties such as strength to weight ratio, dimensional stability and low thermal expansion and contraction. This article [...] Read more.
Cellulose is being considered as a suitable renewable reinforcement for materials production. In particular, cellulose based composites are attracting global interest for their unique and intrinsic properties such as strength to weight ratio, dimensional stability and low thermal expansion and contraction. This article investigates the preparation of cellulose pulp fibers with polyamide-6 (PA6) polymer and the effect of fiber orientation within the matrix on the final properties of the biocomposite. Cellulose pulp fibers were melt compounded with PA6 using a thermo-kinetic mixer. Different formulations were prepared and the compounds were manufactured into test samples by injection molding. Mechanical characterization revealed that elastic modulus and the flexural properties increased linearly with the fiber composition. The effect of fiber orientation was examined from square samples out of which individual specimens were cut at different directions with respect to the flow direction. The contributions related to fiber content and effect of fiber orientation on the tensile properties assessed lent positively towards parallel oriented samples (0°) with respect to flow direction. Furthermore, the cellulose network within the biocomposite revealed the superior interfacial properties between the cellulose and PA6 matrix when observed under a scanning electron microscope. Full article
(This article belongs to the Special Issue New Frontiers of Natural Fibers and Their Composites)
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21 pages, 3598 KiB  
Article
Cytotoxicity and UV Light Absorption in Biopolymeric Membranes from Native Vegetation of Mexico
by Mayela Alhelí García de Alva Magos, Jesús Santa-Olalla Tapia, Miguel Ángel Ramos López, Jessica Molina Maturano, Antonio Ruperto Jiménez Aparicio, Brenda Hildeliza Camacho Díaz and Luz Arcelia García Serrano
Appl. Sci. 2020, 10(14), 4995; https://doi.org/10.3390/app10144995 - 21 Jul 2020
Cited by 3 | Viewed by 2623
Abstract
Sustainable processing from native vegetation such as agave, nopal and aloe, is mainly centered on the components of lignin, cellulose, and hemicellulose, defined generally as lignocellulosic. Cytotoxicity of lignocellulosic biopolymer membranes (LBMs) of mucilages of Opuntia ficus-indica, Aloe barbadensis Miller, fructans, [...] Read more.
Sustainable processing from native vegetation such as agave, nopal and aloe, is mainly centered on the components of lignin, cellulose, and hemicellulose, defined generally as lignocellulosic. Cytotoxicity of lignocellulosic biopolymer membranes (LBMs) of mucilages of Opuntia ficus-indica, Aloe barbadensis Miller, fructans, and residual Agave tequilana Weber fibers at different concentrations (30, 50 and 70%), was evaluated in contact with human fibroblast cells (ATCC® PCS-201-010), cultured in vitro. Long and short LMBs were formed from the fibrous material. The interaction showed mild cytotoxicity according to ISO 10993-5: 2009. Cytotoxic activity demonstrated in the presence of fibroblasts implied a maximum cytotoxicity of close to 46% and a minimum of 7% in LBMs. UV light absorption results of the large fiber LMBs showed the highest prevention of passage of light, having a protective effect mechanism of delaying the response of hypersensitivity as a result of exposure to UV radiation. The morphology and structure were characterized using SEM, FT-IR, and image texture analysis. According to the LBMs reactivity measured, the feasible uses of these membranes can be suggested as materials for biomedical applications over a short period of time, with feasibility as a support to provide some beneficial solutions. Full article
(This article belongs to the Special Issue New Frontiers of Natural Fibers and Their Composites)
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