Preparation of nanolignin rich fraction from bamboo stem via green technology: assessment of its antioxidant, antibacterial and UV blocking properties

Mili, Medha; Hashmi, S. A. R.; Tilwari, Anita; Rathore, Sks; Naik, Ajay; Srivastava, A. K.; Verma, Sarika

doi:10.1080/09593330.2021.1973574

Cited by 11 publications

(10 citation statements)

References 38 publications

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“…In addition, carbon may be stored for a long time in bamboo and wood constructions. The fastest-growing or herbaceous biogenic materials-also known as fast-growing or herbaceous biomass-are among the various biogenic materials and hold the greatest promise for reducing climate change because they can store carbon much more quickly than trees, whose high carbon content is typical of them, [7][8][9]. Bamboo, as a sustainable material, meets the requirements of green architecture.…”

Section: Introductionmentioning

confidence: 99%

“…Except for alkaline soils, deserts, and marshes, bamboo may grow on plains, hilly terrain, and high-altitude mountainous areas. According to some research, bamboo yields more biomass than other lignocellulosic crops, growing at a rate of 15-30 m height in couple of months [7,9,19]. Therefore, bamboo is more costefficient and effectively reduces the greenhouse effect when used as a structural material.…”

Section: Introductionmentioning

confidence: 99%

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Advances in Bamboo Composites for Structural Applications: A Review

Mili¹,

Singhwane²,

Hada³

et al. 2024

Bamboo - Recent Development and Application

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The fastest-growing plant on earth is bamboo; it grows three times as quickly as most other species and is a renewable, adaptable resource with high strength and lightweight. Bamboos are a valuable alternative resource with high physical similarities with genuine hardwoods. Using these naturally available renewable bamboo resources provides a practical approach to an eco-friendly industry mainly based on green materials and sustainable technologies with minimum impact on nature. In this regard, developing advanced bamboo-based composites is an attractive step. The extensive use of bamboo composites is a result of their advantageous qualities, including dimensional stability, natural colour, exquisite texture, and ease of manufacturing. The bamboo-based composites have immense potential to perform as a wood substitute that can reduce timber import and meet future timber requirements that are presently fulfilled by cutting trees or importing timber. This chapter aims to exhibit these advanced bamboo composites as a competitive and sustainable substitution for conventional timber material for structural applications. The present chapter highlights the advanced bamboo composites as engineered materials utilised mainly for structural applications in housing sectors and construction industries in the form of standard regular shapes such as beams, planks, lumbers, truss elements etc. One of the sections would be dedicated to the future scope of these advanced bamboo composites and recommendations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advances in Bamboo Composites for Structural Applications: A Review

Mili¹,

Singhwane²,

Hada³

et al. 2024

Bamboo - Recent Development and Application

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“…Nanolignin (NL) [26,27], produced from wood [28] and other biomass sources [29,30], shows excellent antioxidant properties [29][30][31] due to its phenolic group-rich macromolecular structure. Due to its typically negative surface charge, lignin can be easily complexed with CN, which is positively charged in slightly acidic water solutions [32].…”

Section: Introductionmentioning

confidence: 99%

Chitin Nanofibril-Nanolignin Complexes as Carriers of Functional Molecules for Skin Contact Applications

Coltelli

Morganti²,

Castelvetro

et al. 2022

Nanomaterials

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Chitin nanofibrils (CN) and nanolignin (NL) were used to embed active molecules, such as vitamin E, sodium ascorbyl phosphate, lutein, nicotinamide and glycyrrhetinic acid (derived from licorice), in the design of antimicrobial, anti-inflammatory and antioxidant nanostructured chitin nanofibrils–nanolignin (CN-NL) complexes for skin contact products, thus forming CN-NL/M complexes, where M indicates the embedded functional molecule. Nano-silver was also embedded in CN-NL complexes or on chitin nanofibrils to exploit its well-known antimicrobial activity. A powdery product suitable for application was finally obtained by spray-drying the complexes co-formulated with poly(ethylene glycol). The structure and morphology of the complexes was studied using infrared spectroscopy and field emission scanning electron microscopy, while their thermal stability was investigated via thermo-gravimetry. The latter provided criteria for evaluating the suitability of the obtained complexes for subsequent demanding industrial processing, such as, for instance, incorporation into bio-based thermoplastic polymers through conventional melt extrusion. In vitro tests were carried out at different concentrations to assess skin compatibility. The obtained results provided a physical–chemical, morphological and cytocompatibility knowledge platform for the correct selection and further development of such nanomaterials, allowing them to be applied in different products. In particular, chitin nanofibrils and the CN-NL complex containing glycyrrhetinic acid can combine excellent thermal stability and skin compatibility to provide a nanostructured system potentially suitable for industrial applications.

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“…It was indicated, that the growth of bacteria was only inhibited for S. aureus and the antibacterial properties against gram-positive bacteria increased with the increased amount of lignin. On the other hand, Mili et al (2021 ) presented nanolignin particles which were prepared from the bamboo-derived macro-rich fraction with the use of an ultrasonication procedure. They were tested again with gram-positive and gram-negative bacteria and the antibacterial activity of prepared material and UV blocking effect was observed; therefore, the nanolignin material may be used as an antioxidant and antibacterial agent.…”

Section: Introductionmentioning

confidence: 99%

The Practical Utility of Imidazolium Hydrogen Sulfate Ionic Liquid in Fabrication of Lignin-Based Spheres: Structure Characteristic and Antibacterial Activity

et al. 2022

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In this study, lignin-based spherical particles (Lig-IL) with the use of 1-(propoxymethyl)-1H-imidazolium hydrogen sulfate were prepared in different biopolymer and ionic liquid (IL) weight ratios. The application of IL during the preparation of spherical particles is an innovative method, which may be beneficial for further applications. The particles were obtained with the use of the soft-templating method and their chemical, structural and morphological characterization was performed. The spherical shape of products and their size (91–615 nm) was confirmed with the use of scanning electron microscopy (SEM) images and the particle size distribution results. The attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectra were analyzed to identify functional groups of all precursors and produced material and it was confirmed, that all materials exhibit characteristic hydroxyl and carboxylic groups, but the presence of carbonyl group was detected. Moreover, the zeta potential analysis was performed to evaluate the electrokinetic behavior of obtained materials. It was confirmed, that all materials are colloidally stable in pH above 4. Produced lignin-based spherical particles were used for evaluation of their antibacterial properties. Particles were tested against Staphylococcus aureus (S. aureus), a gram-positive bacterium, and Escherichia coli (E. coli), a gram-negative one. It was observed, that only the material with the highest addition of IL showed the antibacterial properties against both strains. A reduction of 50% in the number of microorganisms was observed for particles with the addition of hydrogen sulfate ionic liquid in a 1:1 ratio after 1 h. However, all prepared materials exhibited the antibacterial activity against a gram-positive bacterium.

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Preparation of nanolignin rich fraction from bamboo stem via green technology: assessment of its antioxidant, antibacterial and UV blocking properties

Cited by 11 publications

References 38 publications

Advances in Bamboo Composites for Structural Applications: A Review

Advances in Bamboo Composites for Structural Applications: A Review

Chitin Nanofibril-Nanolignin Complexes as Carriers of Functional Molecules for Skin Contact Applications

The Practical Utility of Imidazolium Hydrogen Sulfate Ionic Liquid in Fabrication of Lignin-Based Spheres: Structure Characteristic and Antibacterial Activity

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