Thermal properties of hemp fibre non-woven materials

Freivalde, Līga; Kukle, Silvija; Russell, Stephen J.

doi:10.1088/1757-899x/49/1/012030

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…The structural parameters of knitted fabrics and majority of physical and mechanical properties depend on the technical characteristics of knitting machine and properties of yarns. The yarn diameter, origin of fibres, knitting structure, course and wale density, yarn twist level and linear density are the main factors affecting the porosity of knitted fabrics [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Development of multi-layered weft-knitted fabrics for thermal insulation

Buzaite

Repon

Milašienė

et al. 2019

Journal of Industrial Textiles

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The main goal of the presented study was to develop new multi-layered weft-knitted structure for thermal insulation and to investigate the dynamic of the heat transfer through this fabric. For knitting of outer and inner layers of this structure, different raw materials of yarns were used, i.e. wool, cotton, polyester and acrylic yarns. All the newly developed multi-layered weft-knitted fabrics show thermal insulation as, after 1 h of observation, temperature on the outer layer of all tested fabrics does not reach 40℃, i.e. the temperature of a heated plate. The results of this research showed that the nature of the yarns has a significant influence on the air permeability and dynamic of the heat exchange through the multi-layered structure, as it influences porosity of the knitted fabric. The results showed that the best fabric was the one where the outer layers are knitted from woollen yarns and the inner layer from polyester filament yarns.

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Section: Introductionmentioning

confidence: 99%

Development of multi-layered weft-knitted fabrics for thermal insulation

Buzaite

Repon

Milašienė

et al. 2019

Journal of Industrial Textiles

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“…Hemp fiber decreased the thermal conductivity ( K ) of the virgin acrylic polymer matrix because of its low value of K . A composite from hemp and polypropylene showed K values ranging from 0.028 up to 0.04 W·m –1 ·K –1 ) . The thermal resistance of hemp and polybutylene terephthalate co-glutarate composite significantly improved by adding sepiolite, carbon black, and carbon nanotube fillers .…”

Section: Introductionmentioning

confidence: 99%

“…A composite from hemp and polypropylene showed K values ranging from 0.028 up to 0.04 W·m –1 ·K –1 ). 18 The thermal resistance of hemp and polybutylene terephthalate co-glutarate composite significantly improved by adding sepiolite, carbon black, and carbon nanotube fillers. 19 Polyurethane-hemp fibers composite presented excellent insulating properties compared to the traditional insulation materials (glass wool, mineral wool).…”

Section: Introductionmentioning

confidence: 99%

“…Currently, hemp plays a significant role as an insulating material in buildings. 16,17 Hemp contributes to thermally insulating and acoustic properties compared with conventional insulations due to its better moisture resistance and capillary water drainage properties. The thermal conductivity of hemp fiber is reported in the range of 0.038 to 0.04 W…”

Section: Introductionmentioning

confidence: 99%

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Thermal Response of Biocarbon-Filled Hemp Fiber-Reinforced Bioepoxy Composites

2023

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We investigated the thermal conductivity of materials based on pyrolysis temperature, filler loading, filler size, and type of biomass feedstock. Hemp stalk and switchgrass were pyrolyzed at 450, 550, and 650 °C and crushed into 50, 75, and 100 μm particle sizes. Biocarbon fillers (10, 15, and 20 wt %) were added to the bioepoxy polymer matrix. The study showed increased filler loading and particle size increased thermal conductivity�the biocomposite samples with 20 wt % filler loading of 100 μm particle size of the biocarbon obtained at 650 °C showed the maximum thermal conductivity in both hemp biocarbon-filled composites (0.59 W•m −1 •K −1 ) and switchgrass-filled composites (0.58 W•m −1 •K −1 ) with the highest flame time. Biocarbon in biofiber-reinforced polymer composites can improve thermal conductivity and extend the flame time. These findings significantly contribute to developing hemp-based bioepoxy composite materials for thermal applications in various fields. These include insulating materials for buildings and thermal management systems, energy-efficient applications, and help in material selection and product design with a positive environmental impact.

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Bio-based materials for nonwovens

2021

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The nonwoven industry is one of the most innovative and important branches of the global fiber products industry. However, the use of petrochemicalbased materials in many nonwoven products leads to severe environmental issues such as generation of microplastics. Synthetic material use in nonwovens is currently around 66%. This review covers potential technologies for the use of bio-based materials in nonwoven products. The current generation of nonwoven products relies heavily on the use of synthetic binders and fibers. These materials allow for products with high functional properties, such as permanence, strength, bulk, and haptic properties. The next generation of nonwoven products will have a higher fraction of natural and renewable materials as both binders and fiber elements. There are a wide range of materials under investigation in various nonwoven product categories. Especially, lignocellulosic materials are of interest. This includes traditional pulp fibers, regenerated cellulose fibers, lignin binders and nanomaterials derived from wood. The development of water stable, strong interfiber bonding concepts is one of the main problems to be solved for advancing biobased nonwoven products.

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Thermal properties of hemp fibre non-woven materials

Cited by 5 publications

References 1 publication

Development of multi-layered weft-knitted fabrics for thermal insulation

Development of multi-layered weft-knitted fabrics for thermal insulation

Thermal Response of Biocarbon-Filled Hemp Fiber-Reinforced Bioepoxy Composites

Bio-based materials for nonwovens

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