Peer-reviewed industrial hemp research papers, sorted by publication date. Browse the latest findings on hemp cultivation, processing, materials science, biomedical applications, and regulatory science from PubMed, OpenAlex, and other indexed sources.
The manufacturing method influences the properties of the produced components. This work investigates the influence of manufacturing methods such as fused filament fabrication (3D printing) and injection molding on water absorption, mechanical and thermal properties of the specimens produced from neat biobased poly(lactic acid) (PLA) polymer and poly(lactic acid)/wood composites. Acrylonitrile butadiene styrene (ABS) acts as the reference material due to its low water absorption and good functio
The optimization of production of lignin-nanofiber-filled thermoplastic starch composite film for potential application in food packaging was carried using Response Surface Methodology (RSM), through the adoption of the Box-Wilson Central Composite Design (CCD) with 1 center point. The effects of filler loading on moisture absorption (MAB), tensile strength [TS], percent elongation [PE] and Young’s modulus [YM]) of the films were investigated in order to construct the desirability indi
In the present work, engineered by compression molding process via a hydraulic press, the A and B composite samples were carried out with 5% and 10% ratio respectively of Ricinodendron heudelotii oil-based alkyd resin in bio-based matrix made of unsaturated polyester using jute fibers as reinforcement material. The samples’ thermal decomposition was performed through thermogravimetry (TG) and derivative thermogravimetry (DTG) analyses. Both composite samples exhibit two stages of decomposition,
This qualitative study was embarked with the aim of exploring school leaders’ practices in enhancing unity among Malaysian secondary school leaders. The instrument used for collecting data involved visiting the participated schools in order to conduct individual face-to-face interviews involving 12 participants who are secondary school leaders (principals and senior assistants). The data were analyzed manually. The findings showed that school leaders have not yet fully played their role to insti
The present paper explores a new concept of a hybrid eco-composite by substituting the natural fibre plies with thin wood veneers. The new composite, named Fibre-Wood Laminate (FWL), is inspired by fibre-metal laminate materials. The studied FWL configuration consisted of a single thin pinewood veneer at each of the outer layers of a flax woven fabric reinforced bio-epoxy composite manufactured by infusion. Three-point bending results showed that wood veneer gives a highly anisotropic nature to
The study presents an experimental investigation of the impact response of hybrid biocomposites that are based on polypropylene homopolymer HP400R reinforced with man-made cellulose fibres and cellulose microfiller. Man-made cellulose fibres, such as rayon tire cord yarn (Cordenka) and soft wood microfibres (Weho 500) were added to the polypropylene matrix with different weight contents. Composite specimens were manufactured by injection moulding. Absorbed energies and maximum impact forces of b
Cocoa pod husk composites for structural applications face a substantial water absorption problem in which the residual tensile, fatigue, and flexural characteristics always exhibit instant deterioration after immersion in water. Unfortunately, there is an absence of sensitivity analysis research on the composite’s water absorption parameters to establish the crucial parameters that may function as drawbacks. Consequently, this study establishes how the sensitivity analysis of the Fickian’s mode
This study investigated the closed-loop recycling of 3D-printed wood fiber (WF)-filled polylactic acid (PLA) composites via fused filament fabrication (FFF). The WF-PLA composites (WPCs) were extruded into WPC filaments (WPC<sub>f</sub>s) to produce FFF-printed WPC parts (WPC<sub>p</sub>s). The printed WPC<sub>p</sub>s were reprocessed three times via extrusion and 3D-printing processes. The tensile properties and impact strengths of the WPC<sub>f</sub>s and WPC<sub>p</sub>s were determined. To
The purpose of this overview is to discover materials commonly used in the automotive industry and provide an overview of optimized composites to reduce weight, cost, fuel consumption ,and CO2 emissions. The cost of carbon fiber, Al, and Mg lightweight composites is much higher than conventional materials. It is therefore important for research and development in the areas of reducing costs, improving recyclability, enabling integration ,and maximizing vehicle fuel efficiency. To meet these char
Peer-reviewed industrial hemp research by Alaa Bassuny Ismael; Sofiane Guessasma; Antoine Bozek; Sylvie Durand; Patrice Papineau; Antoine Le Duigou; Mickaël Castro; Johnny Beaugrand; Ana Villares published in Progress in Organic Coatings (2024).
This research work investigates the effects of the concentration and treatment of chopped false banana (Ensete ventricosum) fibres on the mechanical properties of a polypropylene matrix. The chopped false banana fibres (FBFs) were modified using Aloe Vera gel following treatment with 5% NaOH for 12 h at room temperature, with 1% acetic acid used to neutralise the remaining NaOH. FBF-reinforced polypropylene composite plates were then manufactured with 10, 20, 30, and 40 wt.% of chopped FBF. The
Density is a decisive factor in determining one of the most important advantages of flax fiber-reinforced polymer (FFRP) composites, i.e. their relatively low weight leading to high specific properties. As a fundamental physical property of composites, density enters in many engineering design and quality control calculations and its value is a determining factor for several applications. Especially, we need precise material properties including density so as to develop efficient numerical model
This work aims to develop and characterize a hybrid composite material with two particles of the same size. As reinforcing particles, the hulls of palm nuts and coconut are chosen. Hybrid composite material composites in the form of specimens were produced by molding at 10%, 20% and 30% mass fractions in various sizes (0.63 mm, 1.25 mm and 2.5 mm). The samples were physically characterized (water absorption rate, moisture content, actual, theoretical and apparent density) and mechanical in 3-poi
Paper and cellulose-based materials are known for their sensitivity to humidity, which can create stresses among fibres and increase fragility. More importantly, humidity can lead to the formation of mould and stains, compromising both aesthetic value and long-term preservation, particularly for historical documents and books. This study explored the application of in situ prepared Zeolitic Imidazolate Framework (ZIF-8), a zinc-based MOF, on paper as a potential antimicrobial material. Hand-made
Abstract Manufacturing PHBV biocomposites with spent coffee ground (SCG) is an eco‐friendly approach of repurposing waste materials to improve sustainability. Although, as shown previously, pretreatments of SCG can improve its interaction with PHBV to obtain enhanced properties, the chemical or biological treatment could be time‐consuming, costly, and environmentally harmful. Therefore, this study developed a method of manufacturing PHBV/SCG biocomposites via a simple and industrially viable rea
Nowadays, in the era of growing ecological awareness, composites based on synthetic or bio-based polymers and fillers of natural origin find various potential applications. Plant-based materials are obtained using plant-derived materials, such as e.g., vegetable oil or wood fillers. Such synthesis of polymer composites allows for the selection of the reactants in terms of the potential requirements of the application. In the presented research polymer composites were obtained using bio-based hig
In this work, the feasibility of producing low-cost, recyclable and biodegradable binderless all-cellulose fibreboards was demonstrated through the successful manufacturing of self-binding composites based on recycled paper and kraft fibres. These all-cellulose composites were made by a simple and environmentally friendly solvent-free mechanical fibrillation method using water as a processing aid. Kraft fibres and recycled paper pulp were mixed in a 30/70 w/w ratio and refined simultaneously in
In this study, novel biodegradable polycaprolactone (PCL)-based composites for sustainable packaging applications were developed by adding surface-treated wood fibers (WFs). Specifically, the WFs were treated with citric acid (CA) to improve the fiber/matrix adhesion and then melt compounded with a PCL matrix. The presence of an absorption peak at 1720 cm−1 in the Fourier transform infrared (FTIR) spectra of CA-treated WFs, coupled with the increase in the storage modulus and complex viscosity i
The vacuum infusion method is emerging to produce composite parts, especially thin wall structure aircraft radome. Ansys Fluent is used in the optimization phase for mould filling analysis on aircraft radome part. The permeability fibre is referring to the physical property of the fibre reinforcement to allow fluids to permeate it, thus it is correlated with the viscosity of the resin used. In this work, flax fibre, glass fibre and low viscosity epoxy resin are used to determine the permeability
Nowadays, the high pollution rate in many industrialized countries requires the implementation of environmental standards in the industrial process. But most composite materials have a very low recyclability rate based on thermosetting polymers. As a result, the world of research is now interested in the development of biocomposites based on natural resources, several recent studies of which have highlighted the environmental benefits (low ecotoxicity, biodegradability). Currently, plant fibers
Humidity during the fabrication of natural fibre reinforced composites can harm their mechanical performance. This study examines the effect of humidity during the fabrication of unidirectional kenaf/polylactic acid (PLA) biocomposites on their dynamic and static mechanical properties. Kenaf fibres were conditioned at different relative humidity (RH) levels (40% RH, 60% RH and 80% RH) before being pressed with PLA to form biocomposites. Kenaf/PLA biocomposites were analysed using dynamic mechani
Flax fiber-reinforced polymer (FFRP) composites are getting more and more popular in the construction industry as an emerging environmental-friendly material. However, their obvious creep behavior makes it a design concern for the creep development of structures made from FFRP. Though the creep behavior of the FFRP is critical for the structural design, the creep tests before structure design is not common due to the tests can take a very long time. The Time-temperature superposition principle p
Abstract Modern thermoset composite matrices are primarily prepared from petroleum‐based plastics, while reinforcements commonly consist of non‐renewable and energy‐demanding glass and carbon fibers. Herein, a non‐chemically treated hemp fiber‐reinforced composite was prepared from bio‐based components: hemp nanopaper (NP) and acrylated epoxidized soybean oil (AESO) or acrylated rapeseed oil (ARO). A commercial‐grade AESO was selected as a reference and compared to ARO prepared in a one‐step syn
Peer-reviewed industrial hemp research by K. M. Faridul Hasan; KM. Noman Al Hasan; Péter György Horváth; Bernadett Bolodár Varga; Zsófia Kóczán; László Bejó; Miklós Bak; Tibor Alpár published in Results in Chemistry (2023).
Waste recovery is very important issue due to having vital effects on sustainability of economy and environment health. Recycling of materials such as textiles, plastics, glasses, papers and metals instead of storing, burying or burning results a reduction in raw material demands of industry. This means also that a reduction in amount of money, time and energy spent on to obtain raw materials. From this point of view, the main purpose of this study was determined as the production of textile sur