Defining patterns in the intensification of hemp stalk retting processes DOI Open Access
Viktor Sheichenko, Ivan Rogovskii, Yuliia Skoriak

et al.

Eastern-European Journal of Enterprise Technologies, Journal Year: 2024, Volume and Issue: 6(1 (132)), P. 50 - 63

Published: Dec. 20, 2024

The object of this study is the technological operations primary hemp stalk processing, factors that intensify retting process, and crushing. task addressed was identification technical solutions would enable intensification production processes for retting. Based on research results, it established placing flattened stems in natural polypropylene bags, compared to cellophane accelerates preparation time retted stalks a vertical position by 1.19 times, horizontal 1.38 times. horizontally placed crushed with weekly moistening twice week 2.16 times shorter than uncrushed ones. It determined process crushing pre-prepared cured stalks, whether or position, allows significant reduction period 2.14 freshly cut – 1.27 intensity reflected light flux changed case reaching phase unflattened their placement from initial 32.0 lux 18.0 lux. In under conditions 50.7 16.3 lux, respectively. at 20.3 lowest fiber breaking load value 5.0 daN obtained as well non-flattened (7.0 daN) (3.5 positions

Language: Английский

Natural fibre pultruded profiles: Illustration of optimisation processes to develop high-performance biocomposites for architectural and structural applications DOI Creative Commons
Evgenia Spyridonos, Martin-Uwe Witt,

Klaus Dippon

et al.

Composites Part C Open Access, Journal Year: 2024, Volume and Issue: 14, P. 100492 - 100492

Published: July 1, 2024

The selection of materials in the construction industry plays a pivotal role advancing sustainability goals. Traditional derived from natural resources face inherent constraints linked to geographic limitation, growth time, and geometric inconsistency therefore recent attention has shifted towards developing novel bio-based materials. Composites, offering varying properties geometries, are becoming increasingly popular for customising specific applications. Pultrusion, technology manufacturing linear fibre-reinforced composites, is well-established reliable method. This study delves into optimising pultrusion technology, which traditionally relies on synthetic fibres, by exploring potential alternatives, specifically hemp bast fibres. Additionally, it presents customised formulation based plant-based resin additives. tailored produce high-performance biocomposites use as load-bearing components structural applications, with an initial focus bending structures. elaborates material composition performance these newly developed fibre pultruded profiles, showcasing their mechanical capabilities through rigorous experimentation testing. results demonstrate material's flexural strength 260 MPa modulus 21 GPa radius reaching 0.5 m. While this focuses tested laboratory-scale pultrusion, findings will be later applied upscaled production at industrial level, aiming enhance overall industry.

Language: Английский

Citations

11
Controlled anaerobic water retting of flax as part of an innovative biorefinery process DOI Creative Commons

Judit Harsányi,

Marzena Poraj‐Kobielska, Harald Wedwitschka

et al.

Biomass Conversion and Biorefinery, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 18, 2025

Abstract Due to the increased interest in durable, sustainable and recyclable fabrics, natural fibres are currently experiencing a renaissance. This study investigated controlled anaerobic water retting of flax as potential process step future biorefinery, allowing simultaneous production high-quality fibres, stalks, organic acids or biomethane. Anaerobic resulted formation effluent containing 1.745 ± 605 mg L −1 acetic acid, 1.051 354 butyric 145 38 propionic acid 190 96 caproic acid. Furthermore, 38.0 7.2 mL g oDM hydrolysis gas with 41.6–54.2% CO 2 45.3–58.1% H was produced. digestion tests specific biomethane range 221 14 261 13 CH 4 COD for effluent. The average yield stalks from 22% 51%, respectively. obtained were mainly composed cellulose (75.1% dry matter). Hemicellulose lignin accounted 7.1 0.3% 1.9 0.3%, tensile strength Young’s modulus 130 MPa 35 8 GPa, annual product yields cultivation area 1 ha estimated at 0.67 t 1.55 117 m 3

Language: Английский

Citations

1
Exploring Chemical and Physical Advancements in Surface Modification Techniques of Natural Fiber Reinforced Composite: A Comprehensive Review DOI Creative Commons
Majid Mohammadi, M. R. Ishak, Mohamed Thariq Hameed Sultan

et al.

Journal of Natural Fibers, Journal Year: 2024, Volume and Issue: 21(1)

Published: Oct. 31, 2024

Language: Английский

Citations

6
Water retting process with hemp pre-treatment: effect on the enzymatic activities and microbial populations dynamic DOI Creative Commons
Valeria Ventorino,

Fatima Ezzahra Chouyia,

Ida Romano

et al.

Applied Microbiology and Biotechnology, Journal Year: 2024, Volume and Issue: 108(1)

Published: Sept. 13, 2024

Language: Английский

Citations

5
Drying Behavior of Flax Stems at Different Degrees of Dew Retting Under Simulated Rainfall: Implications for Smart Agriculture and Sensor Development DOI Creative Commons
Ali Reda, L. Buchaillot, S. Arscott

et al.

Agriculture, Journal Year: 2025, Volume and Issue: 15(4), P. 395 - 395

Published: Feb. 13, 2025

Dew retting of flax stems is a key agricultural process which facilitates fiber extraction from parent stems. If sensors are to be developed monitor the degree for optimal extraction, then stem characteristics such as water uptake and loss need accurately known. Here, moisture drying behavior short samples in different degrees dew studied. Their characterized laboratory conditions following simulated light heavy rainfall. The data were fitted with Page model loss. It was observed that rate constant small smaller rain compared rain. Also, over-retted dry more rapidly under-retted samples. findings suggest this due degradation external tissue results could useful testing designers emerging technological sensor-based tools used controlled conditions.

Language: Английский

Citations

0
Natural Fibers Towards Fashion Sustainability: A Review of Raw Materials, Production, Application, and Perspective DOI Creative Commons
Tarikul Islam, Md Monir Hossain, Sha’Mira Covington

et al.

Journal of Natural Fibers, Journal Year: 2025, Volume and Issue: 22(1)

Published: March 23, 2025

Language: Английский

Citations

0
Application of an optimized pectinolytic bacterial consortium to boost hemp water retting DOI Creative Commons
Ida Romano, Valeria Ventorino,

Giuseppina Magaraci

et al.

Industrial Crops and Products, Journal Year: 2025, Volume and Issue: 230, P. 121059 - 121059

Published: April 24, 2025

Language: Английский

Citations

0
Specificity of Thermal Destruction of Nonwoven Mixture Systems Based on Bast and Viscose Fibers DOI Open Access

Altynay S. Kalauova,

Ekaterina E. Palchikova, Igor Makarov

et al.

Polymers, Journal Year: 2025, Volume and Issue: 17(9), P. 1223 - 1223

Published: April 29, 2025

The research investigates the thermal behavior of mixed systems based on natural and artificial cellulose fibers used as precursors for carbon nonwoven materials. Flax hemp were employed components; they first chemically treated to remove impurities enriched with alpha-cellulose. structure, chemical composition, mechanical properties both viscose studied. It was shown that fiber depend production process history; are characterized by a high content exhibit strength characteristics, whereas have greater deformation properties. blended compositions investigated using TGA DSC methods across wide range component ratios. Carbon yield values at 1000 °C found be lower containing 10–40% weight bast fibers, increasing quantity increased. Thus, composition composite affects processes in system. Using Kissinger method, data obtained value activation energy decomposition various systems. three-times higher than systems, indicating their stability. Blends combine benefits precursors, enabling deliberate regulation material yield. This approach opens up prospects creation functional materials high-tech areas, including insulation.

Language: Английский

Citations

0
Microbial communities and their role in enhancing hemp fiber quality through field retting DOI Creative Commons
Eliane Bou orm, Anne Bergeret, Luc Malhautier

et al.

Applied Microbiology and Biotechnology, Journal Year: 2024, Volume and Issue: 108(1)

Published: Nov. 5, 2024

Abstract The current development of industrial hemp “ Cannabis Sativa L.” fibers for technical textiles and applications requires high-quality with homogeneous properties. However, several factors have been reported to influence the fibers’ intrinsic properties, including a post-harvest process known as retting. This plays crucial role in facilitating mechanical extraction from stems. Retting involves degradation amorphous components surrounding fiber bundles enabling their decohesion Microorganisms play central mediating this bioprocess. During retting, they colonize stems’ surface. Therefore, biochemical plant cell wall, acting natural binding between fibers, undergo breakdown through production microbial enzymes. Although its critical role, farmers often rely on empirical retting practices, considering various biotic abiotic factors, resulting heterogenous These limit due inconsistent Thus, purpose review is enhance our comprehension how influences dynamics communities and, consequently, evolution properties stems throughout process. Better understanding effective management, leading high-value fibers. Key points • enables wall components, controlling Microbial enzymatic activity successful bundles. Understanding mechanisms essential consistent .

Language: Английский

Citations

2
Natural Fibers in Composite Materials for Sustainable Building: A State-of-the-Art Review on Treated Hemp Fibers and Hurds in Mortars DOI Open Access

Louiza Siouta,

Maria Apostolopoulou, Asterios Bakolas

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10368 - 10368

Published: Nov. 27, 2024

In recent years, natural-fiber composite building materials have experienced a revival and become an important area of interest for the international scientific community as sustainable solution new constructions restoration interventions. Natural fibers are obtained from renewable sources thus environmentally friendly, while at same time they do not harm human health, contain toxic substances. Furthermore, natural reinforced composites present enhanced thermal acoustic properties. However, variety components, presence hydroxyl groups, surface impurities which plant possess, create series issues related to design materials, affect their final Aiming optimize physical chemical characteristics fibers, several treatments been applied. International research focuses mainly on hemp considered particularly durable extensively studied. This literature review discusses properties hurds, applied up today, effect fiber well future trends. Mortars with treated mechanical benefits in most cases, such higher flexural tensile strength. Also, improved adhesion between mortar matrices is commonly accepted by researchers.

Language: Английский

Citations

1