Mechanical, thermal and ballistic performance of epoxy composites reinforced with Cannabis sativa hemp fabric

Ribeiro, Matheus Pereira; Neuba, Lucas de Mendonça; Silveira, Pedro Henrique Poubel Mendonça da; Luz, Fernanda Santos da; Figueiredo, André Ben-Hur da Silva; Moreira, Mariane Oliveira

doi:10.1016/j.jmrt.2021.02.064

Cited by 60 publications

(43 citation statements)

References 53 publications

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“…An elongation band detected at 1650 cm −1 is assigned to the carbonyl group of the acetyl ester in hemicellulose and the carbonyl aldehyde in lignin. The broad band of 1244 cm −1 corresponds to the asymmetric C–O vibration [ 17 , 74 , 75 ].…”

Section: Resultsmentioning

confidence: 99%

Thermal and Chemical Characterization of Kenaf Fiber (Hibiscus cannabinus) Reinforced Epoxy Matrix Composites

et al. 2021

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Kenaf (Hibiscus cannabinus L.) is one of the most investigated and industrially applied natural fibers for polymer composite reinforcement. However, relatively limited information is available regarding its epoxy composites. In this work, both thermal and chemical properties were, for the first time, determined in kenaf fiber reinforced epoxy matrix composites. Through XRD analysis, a microfibrillar angle of 7.1° and crystallinity index of 44.3% was obtained. The FTIR analysis showed the functional groups normally found for natural lignocellulosic fibers. TMA analysis of the composites with 10 vol% and 20 vol% of kenaf fibers disclosed a higher coefficient of thermal expansion. The TG/DTG results of the epoxy composites revealed enhanced thermal stability when compared to plain epoxy. The DSC results corroborated the results obtained by TGA, which indicated a higher mass loss in the first stage for kenaf when compared to its composites. These results might contribute to kenaf fiber composite applications requiring superior performance.

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Section: Resultsmentioning

confidence: 99%

Thermal and Chemical Characterization of Kenaf Fiber (Hibiscus cannabinus) Reinforced Epoxy Matrix Composites

et al. 2021

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“…The fiber was considered with an almost circular cross-section [ 43 ], and the volume was calculated by:

where d is the equivalent diameter measured, as described elsewhere [ 42 ]. The DGEBA/TETA epoxy resin density value of 1.11 g/cm 3 was taken from the literature [ 44 ]. Samples were produced with 10, 20, 30 and 40 vol% fibers.…”

Section: Methodsmentioning

confidence: 99%

Physical and Mechanical Characterization of Titica Vine (Heteropsis flexuosa) Incorporated Epoxy Matrix Composites

et al. 2021

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Titica vine (Heteropsis flexuosa) is a typical plant of the Amazon region commonly used for making baskets, bags, brooms and furniture, owing to its stiff fibers. In spite of its interesting properties, there is so far no reported information regarding the use of titica vine fibers (TVFs) in engineering composite materials. In this work, the TVF and its epoxy composites were for the first time physically, thermally and mechanically characterized. Additionally, the effect of two kinds of chemical treatments, one with sodium carbonate and one with calcium lignosulfonate, as well as different volume fractions, 10, 20, 30 and 40 vol%, of TVF-reinforced composites were assessed for corresponding basic properties. The thermogravimetric results of the composites reveal enhanced thermal stability for higher TVF content. In addition, the composite incorporated with 40 vol% of TVFs treated with sodium carbonate absorbed 19% more water than the composites with untreated fibers. By contrast, the calcium lignosulfonate treatment decreased water absorption by 8%. The Charpy and Izod impact tests showed that the composites, incorporated with the highest investigated volume fraction (40 vol%) of TVF, significantly increased the absorbed energy by 18% and 28%, respectively, compared to neat epoxy. ANOVA and Tukey statistical analyses displayed no direct influence of the chemical treatments on the energy absorption of the composites for either impact tests. SEM images revealed the main fracture mechanisms responsible for the performance of TVF composites.

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“…[8] Thanks to the European Green Course and the joint global trend towards producing more environmentally friendly materials from renewable natural resources, the number of studies focusing on the use of hemp fibers and epoxy resins in producing composite materials has increased. [9] In addition, topicalities and trends both in the European Union and in Latvia are developing of new nano-materials and smart materials to be used in the production of new products, as well as the replacement of fossil materials with renewable materials. The functional component of composite materials must come from natural local raw materials such as fiber plants, including hemp.…”

Section: Composite Materialsmentioning

confidence: 99%

The Application of Hemp in Bioeconomy

Teirumnieka

Blumberga²,

Teirumnieks³

2021

ETR

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Global trends in the world are currently representing a serious incentive to bring ‘green thinking’ to life. This is the case of replacing synthetic materials derived from fossil resources with natural-origin, renewable resources. In the automotive industry and other segments of the manufacturing industry, increasing attention is being paid to the use of natural fibers in the manufacturing of composite materials. For example, flax and hemp fiber, as reinforcing material, is starting to widely replace carbon fiber. It is not just an ecological benefit, but also an important product protecting human health, since the amount of emissions that pollute the environment is minimized. Consequently, that lead to reduced intake by human being of harmful substances that would affect its health status. Existing composite materials used in motor vehicles, produced from carbon fibers, are creating very sharp fracture areas in the event of accidents causing human injury, while materials from natural fiber plants in this case are free from sharp edges at the place of fracture. Raw materials derived from hemp processing are used in the automotive, textile industry, construction (hemp concrete, heat insulation material), energy, biofuel production, arts and design, paper production, food, medicine, etc. This paper covers the main types of products derived from hemp.

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Mechanical, thermal and ballistic performance of epoxy composites reinforced with Cannabis sativa hemp fabric

Cited by 60 publications

References 53 publications

Thermal and Chemical Characterization of Kenaf Fiber (Hibiscus cannabinus) Reinforced Epoxy Matrix Composites

Thermal and Chemical Characterization of Kenaf Fiber (Hibiscus cannabinus) Reinforced Epoxy Matrix Composites

Physical and Mechanical Characterization of Titica Vine (Heteropsis flexuosa) Incorporated Epoxy Matrix Composites

The Application of Hemp in Bioeconomy

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