Thermal Characterization of Alkali Treated Kenaf Fibers and Kenaf-Epoxy Composites

Gardner, Levi; Munro, Troy; Villarreal, Ezekiel; Harris, Kurt; Fronk, Thomas H.; Ban, Heng

doi:10.1007/s12221-018-7796-1

Cited by 17 publications

(2 citation statements)

References 36 publications

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“…Surface modification of natural fibers has recently attracted significant research interest for the improvement of compatibility and interfacial bond strength of composites [8]. Chemical modifications of lignocellulosic fiber, such as alkalization [9][10][11], benzoylation [12,13] and acetylation [14], and silane treatment [15,16] improve fiber strength by overcoming high water absorbance and low thermal stability [17]. Alkali treatment is widely used as it is the least expensive, most efficient, and most practical technique to improve the resistance of lignocellulose fiber to moisture compared to other chemical variants [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Acetylated Kenaf Fiber Composites

2021

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Bio-composites containing kenaf and starch as the filler and matrix, respectively, and Polyvinyl alcohol (PVA) and Polyethylene glycol (PEG) as plasticizers were fabricated. The acetylation of hydrophilic kenaf increased the hydrophobic matrix and surfactant bonding in the complex, and the starch matrix increased the biodegradability. The physical, thermal, and biodegradability properties of composites comprising acetylated kenaf and starch (S), acetylated kenaf, starch, and PVA (S+PVA), and acetylated kenaf, starch, and PEG (S+PEG) were evaluated. The results showed that the acetylation of kenaf caused its surface to swell, improving the interfacial adhesion between kenaf and starch in the composites, whereas PVA and PEG did not enhance the physical properties of the composites. The addition of plasticizers caused a slight improvement in the thermal fluidity and stability of the acetylated kenaf composites. In addition, the composites buried in soil showed higher biodegradability than those buried in compost. The presence of moisture in the soil also increased the biodegradability by 80 %. The results of this study demonstrate the high potential of the acetylated kenaf composites as an alternative to synthetic polymer products. Moreover, considering their biodegradable nature, these composites can be applied in treatments and techniques that are focused on the safe disposal of plastic waste for the mitigation of environmental pollution.

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Section: Introductionmentioning

confidence: 99%

Biodegradable Acetylated Kenaf Fiber Composites

2021

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“…Studies on thermal conductivity of kenaf fiber alone are also very scarce. The first study on the topic was reported by Gardner et al [ 19 ] who evaluated the thermal conductivity of kenaf fiber before and after alkali treatment. In the same study, thermal conductivity and diffusivity of the unidirectionally oriented kenaf–epoxy composites reinforced with NaOH-treated and untreated kenaf fibers were assessed.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Strength, Thermal Conductivity and Electrical Breakdown of Kenaf Core Fiber/Lignin/Polypropylene Biocomposite

et al. 2020

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Mechanical strength, thermal conductivity and electrical breakdown of polypropylene/lignin/kenaf core fiber (PP/L/KCF) composite were studied. PP/L, PP/KCF and PP/L/KCF composites with different fiber and lignin loading was prepared using a compounding process. Pure PP was served as control. The results revealed that tensile and flexural properties of the PP/L/KCF was retained after addition of lignin and kenaf core fibers. Thermal stability of the PP composites improved compared to pure PP polymer. As for thermal conductivity, no significant difference was observed between PP composites and pure PP. However, PP/L/KCF composite has higher thermal diffusivity. All the PP composites produced are good insulating materials that are suitable for building. All PP composites passed withstand voltage test in air and oil state as stipulated in IEC 60641-3 except PP/L in oil state. SEM micrograph showed that better interaction and adhesion between polymer matrix, lignin and kenaf core fibers was observed and reflected on the better tensile strength recorded in PP/L/KCF composite. This study has successfully filled the gap of knowledge on using lignin and kenaf fibers as PP insulator composite materials. Therefore, it can be concluded that PP/Lignin/KCF has high potential as an insulating material.

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Investigations on the internal curing process and mechanical properties of winding composite considering the structure of plant fiber

Liu

et al. 2020

J of Applied Polymer Sci

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In this study, the equivalent heat conduction model and internal curing process optimization model of the composite material based on the cavity and twisting structure of the plant fiber were established. Also, the effects of temperature, the volume fraction of the plant fiber cavity and twist on the temperature field, curing degree, and curing deformation during the internal curing process of the jute fiber winding composite pipe were analyzed. The accuracy of process simulation was verified by the internal curing experiment based on electromagnetic heating and was combined with using the microstructure test and tensile strength test of the NOL ring. However, in the case of twisted fiber, an extreme effect on the mechanical properties of the composite was noted.

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Thermal Characterization of Alkali Treated Kenaf Fibers and Kenaf-Epoxy Composites

Cited by 17 publications

References 36 publications

Biodegradable Acetylated Kenaf Fiber Composites

Biodegradable Acetylated Kenaf Fiber Composites

Mechanical Strength, Thermal Conductivity and Electrical Breakdown of Kenaf Core Fiber/Lignin/Polypropylene Biocomposite

Investigations on the internal curing process and mechanical properties of winding composite considering the structure of plant fiber

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