Characterization of microfiber isolated from <i>Hibiscus sabdariffa</i> var. <i>altissima</i> fiber by steam explosion

Karakoti, Abhilash; Biswas, Sunanda; Aseer, J. Ronald; Sindhu, Nidhi; Sanjay, M. R.

doi:10.1080/15440478.2018.1477085

Cited by 25 publications

(12 citation statements)

References 26 publications

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“…The cellulosic contents are exposed by different pre-treatment processes (bleaching, mercerization, pulping, and enzyme) of lignocellulosic fibers. Natural nanoparticles can be synthesized by using various methods, such as mechanical processes, including sonication, grinding, and homogenizing, or chemical treatments (ionic liquid and acid hydrolysis), or by using both types of combined processes (steam explosion) [95][96][97]. CNF entails amorphous regions which are composed of stretched cellulosic nanofibers providing higher mechanical properties, whereas CNC has a higher rigidity, resulting in an elevated Young's modulus, tensile strength, and thermal stability [98].…”

Section: Natural Fibersmentioning

confidence: 99%

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Potential Natural Fiber Polymeric Nanobiocomposites: A Review

2020

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Composite materials reinforced with biofibers and nanomaterials are becoming considerably popular, especially for their light weight, strength, exceptional stiffness, flexural rigidity, damping property, longevity, corrosion, biodegradability, antibacterial, and fire-resistant properties. Beside the traditional thermoplastic and thermosetting polymers, nanoparticles are also receiving attention in terms of their potential to improve the functionality and mechanical performances of biocomposites. These remarkable characteristics have made nanobiocomposite materials convenient to apply in aerospace, mechanical, construction, automotive, marine, medical, packaging, and furniture industries, through providing environmental sustainability. Nanoparticles (TiO2, carbon nanotube, rGO, ZnO, and SiO2) are easily compatible with other ingredients (matrix polymer and biofibers) and can thus form nanobiocomposites. Nanobiocomposites are exhibiting a higher market volume with the expansion of new technology and green approaches for utilizing biofibers. The performances of nanobiocomposites depend on the manufacturing processes, types of biofibers used, and the matrix polymer (resin). An overview of different natural fibers (vegetable/plants), nanomaterials, biocomposites, nanobiocomposites, and manufacturing methods are discussed in the context of potential application in this review.

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Section: Natural Fibersmentioning

confidence: 99%

“…The temperature is elevated from 25 to 200 • C with the gradient of 10 • C/min. Then, the temperature is cooled down quickly (−50 • C/min) to the required temperature (110,105,100,95, and 90 • C) for crystallization assessment. Following this, crystallization is allowed for 120 min at an isothermal temperature.…”

Section: Tio 2 -Based Nbcmentioning

confidence: 99%

Potential Natural Fiber Polymeric Nanobiocomposites: A Review

2020

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“…This first step is not general in all other fiber samples and this is because of the fiber was stabilized at 110 °C for 10 minutes. The second weight loss of raw Agave fibers found to be at 350.8 °C, and this is due to thermal depolymerization of hemicellulose, and breakdown of glycosidic linkages of cellulose (Karakoti et al 2020). In Fig.…”

Section: Thermal Stability Analysismentioning

confidence: 92%

Synthesis and characterization of nano-fibrillated cellulose derived from green Agave americana L. fiber

Krishnadev

Subramanian

Janavi

et al. 2020

BioRes

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Excessive exploitation of petroleum-based plastics and synthetic fibers is harming the environment. This study isolated nano-fibrillated cellulose (NFC) from plant fiber (Agave americana). The as-extracted Agave fibers were chemically treated (alkali, bleaching, and acid hydrolysis coupled with ultrasonication). Functional and structural analysis were performed using Fourier-transform infrared spectroscopy and X-ray diffraction. The surface morphological changes and thermal decomposition behavior were studied by scanning electron microscopy and by thermogravimetry and derivative thermogravimetry, respectively. Fourier-transform infrared peaks confirmed the absence of lignin and hemicellulose in the NFC samples. X-ray diffraction data revealed that the crystallinity index increased from 50.1% to 64.1% from the raw fiber to the NFC. Thermogravimetry and derivative thermogravimetry showed that the stability increased notably from the raw fiber to the NFC stage. The average particle size was 18.2 nm ± 10.14 nm in the NFC sample, which was confirmed by transmission electron microscopy.

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“…Several researchers have utilized the steam explosion technique for the conversion of HSFs into microforms. [116][117][118] Karakoti et al 116 completed the conversion process in four steps. In the first step, the chopped HSFs (10 cm) were treated with 2% alkali solution in an autoclave for one hour; the temperature and pressure were maintained at 120 1C and 20 lb, respectively.…”

Section: Extraction Of Cellulose Microfibres From Hs Plantsmentioning

confidence: 99%