Extraction and characterisation of natural cellulose fibers from Kigelia africana

Ilangovan, Manikandan; Guna, Vijaykumar; Prajwal, B.; Jiang, Qiuran; Reddy, Narendra

doi:10.1016/j.carbpol.2020.115996

Cited by 106 publications

(40 citation statements)

References 25 publications

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“…In this study, the three samples presented bacteriostatic activity against both microorganisms, but the enhancement of the antimicrobial properties is obtained with the addition of the CaO and SiO 2 NPs. The antibacterial activity of lignocellulosic fibers, with similar lignin contents to the jute fibers, has already been reported, where it was also demonstrated that the antibacterial activity is related to the phenolic content in the material (Guna and Ilangovan 2018;Ilangovan et al 2020). This is in accordance with the obtained results, since the jute fibers utilized were in their raw form, therefore presenting a great content of lignin.…”

Section: Antibacterial Activitysupporting

confidence: 88%

In-situ synthesis of CaO and SiO2 nanoparticles onto jute fabrics: exploring the multifunctionality

et al. 2020

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Fibrous based materials with exceptional functionalities have become a target of interest for researchers worldwide. One promising strategy for the development of active fibrous structures with improved functions is their functionalization with nanoparticles (NPs). In this work, jute fabrics were functionalized with calcium oxide (CaO) and silica (SiO 2 ) NPs in order to obtain fibrous structures with several properties including, hydrophobicity, UV protection, antibacterial activity and the degradation of dyes ability. CaO and SiO 2 NPs were synthesized via a simple in situ method, using sodium hydroxide (NaOH) as the reducing agent and water as solvent. Parallelly, the in situ synthesis of the CaO NPs was also tested. The final systems were fully characterized using Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy, Ground-State Diffuse Reflectance and Field Emission Scanning Electron Microscopy and Energy Dispersive Spectroscopy. All these techniques confirmed the successful synthesis of the NPs as well as their well distributed presence onto the fabrics. The samples exhibited very good contact angle values, reaching 143.7°for the fabrics functionalized with CaO and SiO 2 NPs and great values of ultraviolet (UV) protection factors (UPF), reaching 50? for the functionalized fabrics. The developed systems also exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli and photocatalytic activity for the degradation of methylene blue. The wash durability of the nanocoating was also evaluated, confirming that the SiO 2 improved the NPs' anchorage onto the fabrics. Overall, this work presents for the first time, the development of jute fabrics with CaO-SiO 2 NPs with several functionalities.

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Section: Antibacterial Activitysupporting

confidence: 88%

In-situ synthesis of CaO and SiO2 nanoparticles onto jute fabrics: exploring the multifunctionality

et al. 2020

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“…The ibres also exhibited antibacterial properties and hydrophobic nature. All the other characters are similar to that of cotton and many conventional ibres (Ilangovan et al, 2020).…”

Section: Chemical Constituentsmentioning

confidence: 55%

Kigelia africana (Lam.) Benth: Sausage of Medicinal Properties

Jubilee

Komala

2021

ijrps

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Nature had been serving humanity from ages by providing with the food and resources of our well-being. It was serving with medicines and herbs that are used to heal many disorders. There were numerous lead molecules that had been isolated from natural sources, especially plants. Kigelia africana (Lam.) Benth is a widely distributed plant in Africa. Savage tree or the cucumber plant is the common name of the plant. It belongs to the family Bignoniaceae. The plant is a native plant of Africa which is confined to the south, central and West African regions. Preliminary phytochemical screening was performed for the plant revealed the presence of alkaloids, tannins, saponins, flavonoids, carbohydrates and sapogenetic glycosides. The plant has been reported to contain flavonoids, aldehyde iridioids, coumarins like dihydroisocoumarin, naphthoquinones like pinnatal, isopnnatal, kigelinole and isokigelinole. It had been investigated and proven to possess various chemicals that treat inflammations, cancers, psoriasis, dysentery and bacterial infections.

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“…However, the changes were tiny when the alkali treatment time exceeded 2 h. Finally, the as-prepared coarse cellulose was confronted with the H 2 O 2 bleaching process to enhance the cellulose content, which was improved from the 81.26 to 92 wt.%, and the refined cellulose was achieved after the H 2 O 2 bleaching process. Among references, only references [ 21 ] and [ 33 ] reported the content of cellulose, which was 85.31 ± 0.91% and 71%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The chemical structure of products from rice straw to rice straw-derived cellulose at different stages were characterized by infrared spectroscopy, as was shown in Figure 5 A. Curve (a) was the infrared spectrum of rice straw powder; the characteristic absorption peaks at 3413 cm −1 and 2919 cm −1 were assigned to stretching vibration of -OH and the hydrocarbon stretching vibration of -CH 2 -, respectively. The characteristic absorption peak at 1727 cm −1 corresponded to the aliphatic ether group in hemicellulose [ 33 ], and the adsorption peak at 1511 cm −1 was indexed to the aromatic ring skeleton of lignin. For the curve (b) of pretreated rice straw in Figure 5 A, it is detected that the characteristic adsorption peaks of 1511 and 1727 cm −1 were obviously weakened, which indicated that the C 2 H 5 OH/H 2 O autocatalytic process could remove most hemicellulose and lignin.…”

Section: Resultsmentioning

confidence: 99%

Investigation on the Preparation of Rice Straw-Derived Cellulose Acetate and Its Spinnability for Electrospinning

et al. 2021

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Rice straw-derived cellulose (RSC) with purity of 92 wt.% was successfully extracted from rice straw by a novel and facile strategy, which integrated the C2H5OH/H2O autocatalytic process, dilute alkali treatment and H2O2 bleaching process. Influencing factors of the cellulose extraction were systematically examined, such as ethanol concentration, alkali concentration, H2O2 bleaching process and so on; the optimal extraction conditions of cellulose was determined. A series of rice straw-derived cellulose acetate (RSCA) with different degree of substitution (DS) were prepared by the acetylation reaction; the effects of Ac2O/cellulose ratio, reaction temperature and reaction time on the acetylation reaction were investigated. Results of FTIR and XRD analysis demonstrated that highly purified RSC and RSCA were prepared comparing with the commercial cellulose and cellulose acetate. Solubility analysis of RSCA with different DS indicated as-prepared RSCA with DS of 2.82 possessed the best solubleness, which was suitable for electrospinning. Moreover, the flexible RSCA fibrous membrane was easily fabricated by a facile electrospinning method. Our proposed method provided a strategy for realizing the high-value utilization of waste rice straw resource, as prepared RSC and RSCA can be used as chemical raw material, and electrospun RSCA fibrous membrane has various applications in medical materials, food packaging, water purification and so on.

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Extraction and characterisation of natural cellulose fibers from Kigelia africana

Cited by 106 publications

References 25 publications

In-situ synthesis of CaO and SiO2 nanoparticles onto jute fabrics: exploring the multifunctionality

In-situ synthesis of CaO and SiO2 nanoparticles onto jute fabrics: exploring the multifunctionality

Kigelia africana (Lam.) Benth: Sausage of Medicinal Properties

Investigation on the Preparation of Rice Straw-Derived Cellulose Acetate and Its Spinnability for Electrospinning

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