Effects of accelerated weathering on the mechanical properties of hemp fibre/polybenzoxazine based green composites

Dayo, Abdul Qadeer; Qin, Qirui; Kiran, S.; Wang, Jun; Shah, Ahmer Hussain; Zegaoui, Abdeldjalil; Ghouti, Hamid Abdelhafid; Liu, Wenbin

doi:10.1016/j.compositesa.2019.105653

Cited by 37 publications

(18 citation statements)

References 26 publications

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“…Because of the high moisture sensitivity of natural fibre composites, a crucial issue is to assess the influence of water on their mechanical properties. Several studies have shown the loss of rigidity and strength under quasistatic loading after moisture absorption in NFCs (Shahzad, 2011;Azwa et al, 2013;Moudood et al, 2019;Dayo et al, 2020). Some models have been developed to take into account the moisture influence on mechanical behaviour of NFCs.…”

Section: 1mentioning

confidence: 99%

Mechanical Properties of Natural Fiber Composites

Bourhis

Touchard

2021

Encyclopedia of Materials: Composites

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Please provide a 200 word synopsis of the article, which will be used to summarise the work when presented online. This topical review covers the mechanical properties of natural fibre composites (NFCs) that allow applications in many application fields ranging from infrastructure to transportation. Climate change alerts on the importance of sustainability and NFCs offer opportunities when compared to conventional glass-fibre composites. Advantages and drawbacks of NFC versus synthetic composites are considered and discussed. Mechanical properties are assessed both statically and dynamically. The hydrophilicity and its consequences on damage and deformation mechanisms are also addressed. The key to making well-reinforced composites is by ensuring that there is a strong interface between the reinforcing phase and the matrix phase. The interfacial bonding quality is thus discussed through various testing methods and the effects of surface treatments are presented.

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Section: 1mentioning

confidence: 99%

Mechanical Properties of Natural Fiber Composites

Bourhis

Touchard

2021

Encyclopedia of Materials: Composites

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“…Influence of hemp fibers on the behavior of hemp-PP composites was examined at controlled temperature under uniaxial tensile loading at different strain rates [88]. The natural fibres reinforced with biodegradable polymers result in completely "green" composites like hemp/PLA [89], hemp/polybenzoxazine [90], and hemp/ polyester [91].…”

Section: Hemp-based Compositesmentioning

confidence: 99%

Plant Fibers-Based Sustainable Biocomposites

Yadav¹,

Srivastava²,

Vaya³

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Recognizing the facts of high cost, depleting natural feedstocks of energy and materials along with resulting effects by their production and use on environmental emission of green house gases into environment, potential efforts have been made on the use of low-cost, abundant availability, eco-friendly, and energysaving plant fibers-based biocomposites (PBB) and process. Properties of plant fiber-based biocomposites largely influenced by a number of variables, like fiber types, modification of fibers, processing techniques, and environmental condition. This chapter summarized the ancient to recent research on development of plant fibers-based green and sustainable composite materials types along with processing techniques and properties. Plant fibers-based biocomposites have been usefully used in the field of automobile, construction, packaging, medical, and other.

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“…The reinforced composites have great potential application in automobiles, furniture, packing, and construction. [1][2][3][4][5][6] However, plant fibers are naturally hydrophilic and are sensitive to environmental moisture. The reinforced composites tend to absorb environmental water and generally show poor dimensional stability and weak weathering resistances.…”

Section: Introductionmentioning

confidence: 99%

A study of water‐induced elementary hemp fiber swelling and the reinforced polypropylene composite expansion

Han

Gong

et al. 2021

Polymer Composites

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To deeply understand the swelling mechanism, the water swelling ratio and direction of elementary hemp fiber and the reinforced polypropylene (PP) composites were analyzed by both experimental methods and numerical simulation. The fiber swelling force was also calculated based on Flory-Rehner theory. The results showed that the simulated fiber radial swelling ratio of 6.5% is slightly higher than the measured one of 5.6%. For the reinforced composites, the simulated cross-sectional expansion of 3.7% is very close to the measured one of 3.5%. This indicates that fiber mainly swells along its radial direction and the composite expansion is affected by not only fiber swelling ratio and direction but also fiber volume fraction and orientation. The proposed simulation model could easily estimate the swelling ratio and rate of plant fiber and the reinforced composites from their weight gain data. The generated swelling force of fiber is almost 850 MPa at the beginning and decreases to zero until achieving saturation state, which is much higher than the constraint stress of PP matrix and drives composite water expansion behavior. It is concluded that reducing the mixing entropy of plant fiber with water should be an effective approach to inhibit composite water expansion and improve its dimensional stability. The obtained results are beneficial for constructing a water absorption and service life prediction model of shortcut hemp fiber composites.

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Effects of accelerated weathering on the mechanical properties of hemp fibre/polybenzoxazine based green composites

Cited by 37 publications

References 26 publications

Mechanical Properties of Natural Fiber Composites

Mechanical Properties of Natural Fiber Composites

Plant Fibers-Based Sustainable Biocomposites

A study of water‐induced elementary hemp fiber swelling and the reinforced polypropylene composite expansion

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