Lignin/Nanolignin and Their Biodegradable Composites

Rangan, Anupama; Manjula, M.; Satyanarayana, K. G.; Menon, Reghu

doi:10.1002/9781118911068.ch7

Cited by 11 publications

(8 citation statements)

References 77 publications

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“…However, amorphous nature, heterogeneity and complexity of the lignin structure (due to polymerization of the various alcohols and their methoxylations) impeded its application in the high value products. The conversion of lignin from mass state to nanostructures may overcome such limitations and improve the properties of lignin such as antioxidant activity, biocompatibility and biodegradability 14 . It is well known that drug delivery systems are based on the nanoparticle systems such as inorganic nanoparticles, liposomes, micelles and so on.…”

Section: Resultsmentioning

confidence: 99%

Design and fabrication of dual responsive lignin-based nanogel via “grafting from” atom transfer radical polymerization for curcumin loading and release

Dinari

Abdollahi

Majid

2021

Sci Rep

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The story of human dreams about curing all diseases, disorders and lesions is as old as human history. In the frontier of medical science, nanomedicine is trying to solve the problem. In this study, inspired by nanotechnology and using “grafting from” approach, a novel lignin-based nanogel was synthesized using atom transfer radical polymerization (ATRP) method. N-isopropylacrylamide (NIPAM) and N,N-dimethylaminoethylmethacrylate (DMAEMA) comonomers were graft copolymerized from fully brominated lignin as ATRP macroinitiator to synthesize lignin-g-P(NIPAM-co-DMAEMA) nanogel (LNDNG). By controlling the initial comonomer compositions and ATRP conditions, four LNDNG systems with different lower critical solution temperatures (LCSTs) of 32, 34, 37 and 42 °C were prepared. The LNDNGs were evaluated by GPC, FT-IR, 1H NMR, UV–Vis, DLS, SEM and TEM analyses. The prepared nanogels exhibited an average diameter of 150 nm with dual temperature and pH responsiveness. Curcumin (CUR) loading capacity and encapsulation efficiency of the LNDNGs were 49.69% and 92.62% on average, respectively. The cumulative release amount of loaded CUR was observed to be 65.36% after 72 h. The new lignin-based NGs proposed in the present work seems to be a promising, safe and comparable system in a near future.

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Section: Resultsmentioning

confidence: 99%

Design and fabrication of dual responsive lignin-based nanogel via “grafting from” atom transfer radical polymerization for curcumin loading and release

Dinari

Abdollahi

Majid

2021

Sci Rep

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“…In an effort to further valorise lignin, it has been successfully converted into nanoparticles, nanocapsules, nanofibers, nanotubes and other nanostructured materials [190,[271][272][273] and these nanomaterials are finding application in the biomedical sector (gene therapy, controlled drug release, pharmaceutical excipients [274]), food packaging, UV protection, as antioxidants, and in microfluidics [275].…”

Section: Lignin In Nanocomposite Materialsmentioning

confidence: 99%

Valorization of lignin in polymer and composite systems for advanced engineering applications – A review

Collins

Nechifor²,

Tanasă³

et al. 2019

International Journal of Biological Macromolecules

399

176

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“…With The development of material science, The regular structure of nanomaterials is essential to The design of functional materials for advanced applications. Moreover, The recent progress in The preparation of lignin nanoparticles (LNPs) inspired The design of lignin-based functional materials [16][17][18]. Thus, The green synthesis of well-dispersed Au NPs with LNPs is important for The preparation of composite lignin-derived materials.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Characterization of Gold Nanoparticles Using Lignin Nanoparticles

et al. 2020

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With the development of nanotechnology, gold nanoparticles (Au NPs) have attracted enormous attention due to their special properties. The green synthesis of Au NPs from lignin would inspire the utilization of lignin and its related functional materials. In this study, a rapid preparation process of Au NPs was investigated by utilizing lignin nanoparticles (LNPs) under room temperature without chemical addition. The LNPs acted as a reducing agent, stabilizing agent, and template for the preparation of LNPs@AuNPs. The obtained LNPs@AuNPs were characterized by UV-Vis spectrum, Transmission Electron Microscope (TEM), and X-ray photoelectron spectroscopy (XPS). The possible mechanism was illustrated by Fourier Transform Infrared Spectroscopy (FT-IR), 31P, XPS, and UV analyses. The abundant hydroxyl groups (24.96 mmol/g) favored the preparation of Au NPs. Au NPs diameters of 10–30 nm were well dispersed in the LNPs. The optimal reaction conditions were a ratio of 10 mg of LNPs to 0.05 mmol HAuCl4, room temperature, and a reaction time of 30 min. The LNPs@AuNPs exhibited excellent stability in the suspension for more than seven days. The reduction process could be related to the disruption of side chains of lignin, hydroxyl group oxidation, and hydroquinones and quinones from the comproportionation reaction. The LNPs@AuNPs would open a door for the design of Au NP/lignin-derived novel functional materials.

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Lignin/Nanolignin and Their Biodegradable Composites

Cited by 11 publications

References 77 publications

Design and fabrication of dual responsive lignin-based nanogel via “grafting from” atom transfer radical polymerization for curcumin loading and release

Design and fabrication of dual responsive lignin-based nanogel via “grafting from” atom transfer radical polymerization for curcumin loading and release

Valorization of lignin in polymer and composite systems for advanced engineering applications – A review

Green Synthesis and Characterization of Gold Nanoparticles Using Lignin Nanoparticles

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