Lignin nanoparticles: New insights for a sustainable agriculture

Pereira, Anderson do Espírito Santo; Oliveira, Jhones Luiz de; Savassa, Susilaine Maira; Rogério, Carolina Barbára; Medeiros, Gerson Araújo de; Fraceto, Leonardo Fernandes

doi:10.1016/j.jclepro.2022.131145

Cited by 62 publications

(47 citation statements)

References 130 publications

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“…In this context, the advent of lignin hydrocolloids as biobased building blocks has gathered considerable attention and has transformed the possibilities of using lignin in many prospective end-uses . Lignin is a plant-based polyphenol that allows trees to have a strong structure and protection against pests and microorganisms. − Considering its inherent attractive properties such as high carbon content (>60 atom %) and thermal stability, biodegradability, antioxidant activity, and the absorbance of UV irradiation, − lignin has emerged as a prime candidate for biobased nanoparticles and nanohybrids. − In particular, the spherical and colloidally stable lignin nanoparticles (LNPs) display benefits compared to crude lignin powders that are poorly soluble in many common solvents and are heterogeneous both in molecular weight and distribution of functional groups. − …”

Section: Introductionmentioning

confidence: 99%

Stabilized Lignin Nanoparticles for Versatile Hybrid and Functional Nanomaterials

et al. 2022

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Spherical lignin nanoparticles are emerging biobased nanomaterials, but instability and dissolution in organic solvents and aqueous alkali restrict their applicability. Here, we report the synthesis of hydroxymethylated lignin nanoparticles and their hydrothermal curing to stabilize the particles by internal cross-linking reactions. These colloidally stable particles contain a high biobased content of 97% with a tunable particle size distribution and structural stability in aqueous media (pH 3 to 12) and organic solvents such as acetone, ethanol, dimethylformamide, and tetrahydrofuran. We demonstrate that the free phenolic hydroxyl groups that are preserved in the cured particles function as efficient reducing sites for silver ions, giving rise to hybrid lignin−silver nanoparticles that can be used for quick and facile sensing of hydrogen peroxide. The stabilized lignin particles can also be directly modified using base-catalyzed reactions such as the ring-opening of cationic epoxides that render the particles with pHdependent agglomeration and redispersion properties. Combining scalable synthesis, solvent stability, and reusability, this new class of lignin nanoparticles shows potential for its use in circular biobased nanomaterials.

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Section: Introductionmentioning

confidence: 99%

Stabilized Lignin Nanoparticles for Versatile Hybrid and Functional Nanomaterials

et al. 2022

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“…[32][33][34] In recent years the classical disdain on ligninbasically viewed as a byproduct from the pulp and paper industry and destined to be combusted -has given way to a paradigm shift towards the development of lignin-based advanced materials, supported by the inherent properties such as biodegradability, antioxidant activity, and absorbance of UV radiation which are preserved in LNPs. [35][36][37][38][39] In contrast to bulk lignin, LNPs resist aggregation in aqueous dispersions (pH 3-9) owing to their spherical shape and colloidal stability generated by the electrostatic repulsion forces mainly stemming from carboxylic acid and phenolic hydroxyl groups located on the surface of the particle. [40][41][42] This anionic surface charge has been exploited for physical modification of LNPs via adsorption of positively charged polyelectrolytes such as enzymes and polymers for a wide range of applications ranging from biocatalysts to composites among others.…”

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confidence: 99%

Breathable Lignin Nanoparticles as Reversible Gas Swellable Nanoreactors

Moreno

Delgado-Lijarcio

Ronda

et al. 2022

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a tremendous attention owing the possibility for "on demand" engineering employing functional groups able to sense external stimuli such as pH, [5][6][7][8][9] light, [10][11][12] enzymes [13,14], and gases. [15,16] Among the advantages of these advanced materials, the most remarkable ones are the possibility to precisely control their disassembly processes in a spatiotemporal fashion, [12] and the ability to promote morphological transformations. [17,18] These features have made them a thriving research field in recent years, and attractive materials for important applications such as catalysis, biomedicine, or food technology have been developed. [19][20][21] However, most of these materials are derived from fossil resources and often are poorly biodegradable, [22] which together with the concerns about associated greenhouse gas emissions suggest that renewable polymers should play a crucial role in the development of the next generation of polymeric nanoparticles. In fact, macromolecules from renewable and abundant plant biomass are gaining a major role in the efforts to transition to a sustainable materials economy. [23][24][25] Among them, the aromatic plant polymer lignin is one of the most promising bio-based raw materials. [26][27][28][29][30][31] In this sense, lignin nanoparticles (LNPs) are postulated as prime platform for the development of stimuli-responsive nanoparticles. [32][33][34] In recent years the classical disdain on ligninbasically viewed as a byproduct from the pulp and paper industry and destined to be combusted -has given way to a paradigm shift towards the development of lignin-based advanced materials, supported by the inherent properties such as biodegradability, antioxidant activity, and absorbance of UV radiation which are preserved in LNPs. [35][36][37][38][39] In contrast to bulk lignin, LNPs resist aggregation in aqueous dispersions (pH 3-9) owing to their spherical shape and colloidal stability generated by the electrostatic repulsion forces mainly stemming from carboxylic acid and phenolic hydroxyl groups located on the surface of the particle. [40][41][42] This anionic surface charge has been exploited for physical modification of LNPs via adsorption of positively charged polyelectrolytes such as enzymes and polymers for a wide range of applications ranging from biocatalysts to composites among others. [43][44][45][46][47] Here, it is important to note that even one of the main limitations of LNPs, which arises from their dissolution in basic conditions (pH > 9) and aggregationThe design of stimuli-responsive lignin nanoparticles (LNPs) for advanced applications has hitherto been limited to the preparation of lignin-grafted polymers in which usually the lignin content is low (<25 wt.%) and its role is debatable. Here, the preparation of O 2 -responsive LNPs exceeding 75 wt.% in lignin content is shown. Softwood Kraft lignin (SKL) is coprecipitated with a modified SKL fluorinated oleic acid ester (SKL-OlF) to form colloidal stable hybrid LNPs (hy-LNPs). The hy-LNPs with a SKL-O...

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“…The LS nanoparticles obtained in this work can also be safely attributed to potential nanobioagrochemicals. The small size (60–200 nm) and the presence of an effective charge (−13 to 58 mV) on LS nanoparticles allow one to predict their high penetrating ability through the membranes of plant cells and, in general, a positive effect on the further growth and development of the plant organism …”

Section: Resultsmentioning

confidence: 99%

“…The small size (60−200 nm) and the presence of an effective charge (−13 to 58 mV) on LS nanoparticles allow one to predict their high penetrating ability through the membranes of plant cells and, in general, a positive effect on the further growth and development of the plant organism. 54 The effect of LS nanoparticles on the germination and development of seedlings of agricultural crops was evaluated in a separate series of experiments. For this, test seeds (50 each) of radish (Raphanus sativus) and lettuce cross (Lepidium sativum) were placed in Petri dishes with the addition of preprepared aqueous dispersions of LS of various concentrations (0.2−0.7 g/ dm 3 ).…”

Section: Resultsmentioning

confidence: 99%

Sulfite Lignin Nanoparticles and Nanovesicles as Biologically Active Crop Growth Stimulants

Lugovitskaya

2022

ACS Appl. Nano Mater.

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Sulfite lignin or lignosulfonate is a large-scale by product of pulp and paper mills. Features of the chemical structure of lignosulfonates in combination with their biocompatibility, biodegradability, environmental safety, and an unlimitedly reproducible raw material base open up wide opportunities for the practical application of materials based thereon. Of particular interest is the production of nanoparticles and other lignosulfonate-containing nanostructures. Compared to the original lignosulfonates, they acquire additional valuable properties due to their small size, increased surface area, and quantum size effects. In this work, water dispersions of nanoparticles and air-dry nanopowders of various morphologies (nanoparticles, nanovesicles, and nanorods) were prepared on the basis of lignosulfonates. It has been established that the formation of lignosulfonate-containing nanostructures proceeds through various noncovalent interactions in aqueous and mixed water–organic media. A special role is played by electrostatic effects caused by the polyelectrolyte nature of lignosulfonates. The size, charge (ζ-potential), and morphology of the obtained nanostructures depend on and are controlled by the composition of lignosulfonates (M w 9250–46,300 Da), type (EtOH/Ac) and concentration (φEtOH/Ac = 0.60–73.0 vol %) of the organic phase, as well as the method of formation (on the surface of an organic liquid/in the bulk of a lignosulfonate solution) of nanostructures. The growth-stimulating activity of the nanoparticles obtained is shown, which makes it possible to recommend our lignosulfonate-containing nanomaterials as biologically active growth stimulators of agricultural crops (by the example of radish (Raphanus sativus) and watercress (Lepidium sativum)).

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Lignin nanoparticles: New insights for a sustainable agriculture

Cited by 62 publications

References 130 publications

Stabilized Lignin Nanoparticles for Versatile Hybrid and Functional Nanomaterials

Stabilized Lignin Nanoparticles for Versatile Hybrid and Functional Nanomaterials

Breathable Lignin Nanoparticles as Reversible Gas Swellable Nanoreactors

Sulfite Lignin Nanoparticles and Nanovesicles as Biologically Active Crop Growth Stimulants

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