Modification of hemp fibers (Cannabis Sativa L.) for composite applications

Väisänen, Taneli; Batello, Paolo; Lappalainen, Reijo; Tomppo, Laura

doi:10.1016/j.indcrop.2017.10.049

Cited by 109 publications

(76 citation statements)

References 50 publications

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“…The bond between the fibers is loosened through a microbial process called retting [40]. After the retting processing, the fibers are separated from the hemp stem mechanically or manually [41].…”

Section: Hemp Fibermentioning

confidence: 99%

“…KOH, LiOH, or NaOH is usually used in the process of mercerization [6,77]. Alkali treatment removes a fiber's chemical constituents, such as hemicellulose, lignin, and pectin, which increases the fiber surface roughness topographies as well as modifies cellulose structure by increasing its crystallinity [40]. Different studies on alkali treatments have reported both improvements in interfacial shear strength, thermal stability, and moisture absorption reduction as well as improvements in the composites' final properties, such as the tensile and impact strengths, elastic modulus, and fracture toughness [19,78,79].…”

Section: Hemp Fiber Surface Modificationsmentioning

confidence: 99%

See 1 more Smart Citation

Industrial Hemp Fibers: An Overview

Manaia¹,

Manaia²,

Rodriges

2019

Fibers

185

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Industrial hemp (Cannabis sativa) is one of the most available and widely produced bast fibers with high cellulose content. Interest in these fibers is warranted due to environmental protection challenges as well as their inherent properties such as low density, high specific strength, and stiffness. In addition, advanced research and progress have gone into increasing their mechanical performance through surface treatments and in the development of new materials. The most promising application for hemp fibers is as reinforcement in polymeric composites or through hybridization. Nonetheless, more research is needed to improve their properties and expand their range of applications. The biodegradability issue is one problem that must be addressed when considering long life-cycle applications as the reproducibility of these composites’ final properties. This review is a comprehensive literature review on hemp fibers. It includes hemp fibers’ chemical and mechanical properties, surface modifications, hybrid composites, as well as current and future applications.

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Section: Hemp Fibermentioning

confidence: 99%

Section: Hemp Fiber Surface Modificationsmentioning

confidence: 99%

Industrial Hemp Fibers: An Overview

Manaia¹,

Manaia²,

Rodriges

2019

Fibers

185

View full text Add to dashboard Cite

show abstract

“…where: is flexural strength, P is maximum force, L is span length of the specimen, b is width of the specimen and d is thickness [16].…”

Section: Contact Angle Measurementmentioning

confidence: 99%

Investigation of Mechanical Properties of Hemp and Flax Fibers Hybrid Composites for Biomedical Applications

Atmakuri

Palevičius

Griškevičius

et al. 2019

mech

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“…In terms of the present bioactive compounds, hemp (HE) represents the most interesting option, as currently cannabinoids-especially cannabidiol (CBD)-have gained interest in the pharmaceutical industry, which makes it a specialty chemical with high added value that could be an economic driver in a biorefinery [41]. In addition, CBD is contained mainly in the leaves/blossom, which leaves the stem part available to produce fiber and materials [124], and after the respective extraction of the CBD, the remaining solids can be used to obtain sugars and follow the fermentation strategy also described for WS.…”

Section: Raw Materials Selectionmentioning

confidence: 99%

A Review on the Feedstocks for the Sustainable Production of Bioactive Compounds in Biorefineries

Serna-Loaiza

Miltner

et al. 2019

Sustainability

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Since 2015, the sustainable development goals of the United Nations established a route map to achieve a sustainable society, pushing the industry to aim for sustainable processes. Biorefineries have been studied as the technological scheme to process integrally renewable resources. The so-called “bioactive” compounds (BACs) have been of high interest, given their high added value and potential application in pharmaceutics and health, among others. However, there are still elements to be addressed to consider them as economic drivers of sustainable processes. First, BACs can be produced from many sources and it is important to identify feedstocks for this purpose. Second, a sustainable production process should also consider valorizing the remaining components. Finally, feedstock availability plays an important role in affecting the process scale, logistics, and feasibility. This work consists of a review on the feedstocks for the sustainable production of BACs in biorefineries, covering the type of BAC, composition, and availability. Some example biorefineries are proposed using wheat straw, hemp and grapevine shoots. As a main conclusion, multiple raw materials have the potential to obtain BACs that can become economic drivers of biorefineries. This is an interesting outlook, as the integral use of the feedstocks may not only allow obtaining different types of BACs, but also other fiber products and energy for the process self-supply.

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Modification of hemp fibers (Cannabis Sativa L.) for composite applications

Cited by 109 publications

References 50 publications

Industrial Hemp Fibers: An Overview

Industrial Hemp Fibers: An Overview

Investigation of Mechanical Properties of Hemp and Flax Fibers Hybrid Composites for Biomedical Applications

A Review on the Feedstocks for the Sustainable Production of Bioactive Compounds in Biorefineries

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