Impact of sodium bicarbonate treatment of waste hemp fibers on the properties of dicyanate ester of bisphenol-A/bisphenol-A-based benzoxazine resin composites

Zegaoui, Abdeldjalil; Zhang, Huiyan; Derradji, Mehdi; Dayo, Abdul Qadeer; Cai, Wenfang; Zhang, Lili; Wang, Jun; Medjahed, Aboubakr; Ghouti, Hamid Abdelhafid; Liu, Wenbin

doi:10.1177/1464420719830431

Cited by 8 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Hemp Compositesmentioning

confidence: 99%

“…Mechanical properties of fiber-reinforced composites strongly depend on fiber length, diameter, orientation, degree of dispersion, aggregate formation and fiber-matrix compatibility [ 92 , 93 , 94 ]. Hemp is susceptible to thermal and oxidative degradation during processing [ 93 ]. Another key impediment to manufacturing hemp-reinforced composites is the inability of hydrophilic lignocellulose fibers to adhere to hydrophobic matrices [ 71 , 95 ].…”

Section: Hemp Compositesmentioning

confidence: 99%

“… Fiber fraction Matrix Type Pretreatment Processing technique T 5 ( 0 C) T 10 ( 0 C) Y e (800 °C, %) Ref. Hemp (5%) DCBA/BA-a Cyclohexane/ethanol wash + NaHCO 3 Compression molding 309.4 357.1 27.9 [ 93 ] Hemp noil (5%) Polybenzoxazine Cyclohexane/ethanol wash + Alkali Compression molding 315 338 28.2 [ 71 ] Hemp (5%) Polybenzoxazine Cyclohexane/ethanol wash + Alkali Hydraulic hot-press 371 406 43.7 [ 117 ] Hemp (10%) DCBA/BA-a Cyclohexane/ethanol wash + NaHCO 3 Compression molding 303.1 350.3 27.8 [ 93 ] Hemp (10%) Polybenzoxazine Cyclohexane/ethanol wash + Alkali Hydraulic hot-press 367 391 43.4 [ 117 ] Hemp noil (10%) Polybenzoxazine Cyclohexane/ethanol wash + Alkali Compression molding 315 337 28.1 [ 71 ] Hemp (15%) DCBA/BA-a Cyclohexane/ethanol wash + NaHCO 3 Compression molding 298.1 346.4 27.8 [ 93 ] Hemp noil (15%) Polybenzoxazine Cyclohexane/ethanol wash + Alkali Compression molding 311 334 …”

Section: Hemp Compositesmentioning

confidence: 99%

See 2 more Smart Citations

Hemp as a potential raw material toward a sustainable world: A review

Ahmed

Islam

Mahmud

et al. 2022

Heliyon

137

View full text Add to dashboard Cite

Global warming as a result of climate change has become a major concern for people all over the world. It has recently drawn the attention of the entire conscious community, with the fear that if not addressed properly, it will result in the extinction of numerous species around the world. At the same time, it will pose a threat to human health, food security, living environment and standard of living. Thereby, possible solutions are being explored accordingly; regulations have been imposed in places binding green production practices, limiting the emission of CO 2 and emphasis is given on renewable resources along with the search for alternatives to carbon-positive materials. Cannabis sativa L. (hemp) has received a lot of attention because of its multipurpose usability, short production cycle, low capital demand in cultivation, possibility of carbon-negative transformation and easy carbon sequestering material. This paper reviews hemp as a very promising renewable resource including its potential uses in paper, textiles, composites, biofuel, and food industry.

show abstract

Section: Hemp Compositesmentioning

confidence: 99%

Section: Hemp Compositesmentioning

confidence: 99%

Section: Hemp Compositesmentioning

confidence: 99%

See 1 more Smart Citation

Hemp as a potential raw material toward a sustainable world: A review

Ahmed

Islam

Mahmud

et al. 2022

Heliyon

137

View full text Add to dashboard Cite

show abstract

“…Lignocellulosic fibers have high moisture absorption capacity, contributing to weak fiber/matrix adhesion. Chemical surface treatments such as sodium bicarbonate (NaHCO 3 ), 13 sodium hydroxide (NaOH), 14, 15 and potassium hydroxide (KOH) 15 can be performed to improve the adhesion at the interface. These treatments are used to remove the hydroxyl groups and hence reduce the hydrophilic character of fibers.…”

Section: Introductionmentioning

confidence: 99%

Effects of fiber length on the performance of piassava-reinforced epoxy composites

Castro

Amorim

Reis

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

Investigation of lignocellulosic fibers in polymeric composites is important for development of green technologies, to reduce the weight and cost of materials and reduce pollutant emissions. In this work, the influence of piassava fiber length was evaluated to verify the mechanical response when incorporated in fiber-reinforced epoxy composites containing 20% piassava. Raw fibers were cut manually to lengths of 10, 20, and 30 mm. Tensile and flexural properties of the fiber-reinforced composites were compared. An increase in the fiber length was associated with higher tensile and flexural moduli and strength of piassava–epoxy composites, leading to stiffer and lesser ductile material.

show abstract

“…As compared to untreated SRF, treated SRF increased the flexural strength of PCL composite by 9.8% at 20% weight. As a result of the chemical treatment, the interfacial adhesion between the fiber and biopolymer was enhanced, enabling the fiber to withstand the higher loading under test [17].…”

Section: Flexural Strength Of Pcl/srf Biocompositesmentioning

confidence: 99%

Development of novel sustainable biocomposite from polycaprolactone and Sesbania rostrata fiber

Krishnan,

Muthusamy

et al. 2023

Preprint

View full text Add to dashboard Cite

The best way to accelerate the application of polymer composites is by making them an environmentally friendly material that can degrade naturally without harming the environment. Hence, this work focuses on the development of biocomposite by reinforcing bark fibers of Sesbania rostrata (SRF) with polycaprolactone (PCL) biopolymer. Composite samples were fabricated by reinforcing untreated SRF and sodium bicarbonate-treated SRF to PCL at different weight proportions of 10, 15, 20, and 25%. The compressing moulding technique was used to develop the test specimens, and samples were subjected to mechanical, thermal, water absorption, wear, and morphological tests. Biocomposites made of 20 wt.% of chemically treated SRF with PCL yield better mechanical strength than other combinations. The thermal properties of biocomposite were not affected by the inclusion of untreated fibers and were improved by the inclusion of treated fibers. An increased fiber volume fraction in the biocomposites accounts for higher water absorption properties, whereas chemically treated fibers show a significant increase in water resistance. Wear test results expose that the weight loss of the biocomposites is mainly dependent on the contact temperature and adhesion between the SRF surface and the PCL matrix. Scanning Electron Microscope (SEM) analysis of the fractured biocomposites reveals that failure occurs primarily due to fiber pull-out, debonding, and agglomeration.

show abstract

Impact of sodium bicarbonate treatment of waste hemp fibers on the properties of dicyanate ester of bisphenol-A/bisphenol-A-based benzoxazine resin composites

Cited by 8 publications

References 44 publications

Hemp as a potential raw material toward a sustainable world: A review

Hemp as a potential raw material toward a sustainable world: A review

Effects of fiber length on the performance of piassava-reinforced epoxy composites

Development of novel sustainable biocomposite from polycaprolactone and Sesbania rostrata fiber

Contact Info

Product

Resources

About