Preparation and formation mechanism of size-controlled lignin nanospheres by self-assembly

Xiong, Fuquan; Han, Yanming; Wang, Siqun; Li, Gaiyun; Qin, Tefu; Chen, Yuan; Chu, Fuxiang

doi:10.1016/j.indcrop.2017.02.025

Cited by 205 publications

(163 citation statements)

References 39 publications

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“…Fabrication of lignin particles on nano‐ and microscales and some of their general applications were reviewed recently, and we therefore limit our efforts to a brief overview of the methods frequently used (Figure ). The most common method for the preparation of LNPs involves solvent exchange by adding a non‐solvent into lignin solution, or vice versa, causing formation of spherical particles due to the minimization of surface energy (Figure a–c) . Aqueous and non‐aqueous solvents (THF, dioxane, dimethyl sulfoxide, acetone, and ethanol) have been used to dissolve lignin, with water being the most commonly used non‐solvent to produce spherical particles.…”

Section: Lignin‐based Materials and Methods For Active‐substance Loadingmentioning

confidence: 99%

“…Entrapment is by far the most common method to load active cargo in lignin‐based materials. The current view is that LNPs form by supramolecular assembly of poorly water‐soluble molecule domains through electric interactions with aromatic rings . As could be expected from this mechanism, most of the substances entrapped in LNPs are low‐molecular‐weight compounds with low water solubility (Figure ).…”

Section: Entrapment Encapsulation and Adsorption Of Active Substancmentioning

confidence: 96%

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Lignin for Nano‐ and Microscaled Carrier Systems: Applications, Trends, and Challenges

et al. 2019

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To liberate society from its dependence on fossil‐based fuels and materials it is pivotal to explore components of renewable plant biomass in applications that benefit from their intrinsic biodegradability, safety, and sustainability. Lignin, a byproduct of the pulp and paper industry, is a plausible material for carrying various types of cargo in small‐ and large‐scale applications. Herein, possibilities and constraints regarding the physical–chemical properties of the lignin source as well as modifications and processing required to render lignins suitable for the loading and release of pesticides, pharmaceuticals, and biological macromolecules is reviewed. In addition, the technical challenges, regulatory and toxicological aspects, and future research needed to realize some of the promises that nano‐ and microscaled lignin materials hold for a sustainable future are critically discussed.

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Section: Lignin‐based Materials and Methods For Active‐substance Loadingmentioning

confidence: 99%

Section: Entrapment Encapsulation and Adsorption Of Active Substancmentioning

confidence: 96%

Lignin for Nano‐ and Microscaled Carrier Systems: Applications, Trends, and Challenges

et al. 2019

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“…Some papers discuss pi-pi interactions as the main driving force for the aggregation process that leads to particle formation. 35,67 Combining molecular dynamics simulations and atomic force microscopy it was recently shown that the hydrophilic groups of enzymatic hydrolysis lignin interact with water and the hydrophobic skeleton with the organic solvent during lignin dissolution in organic solvent-water binary mixtures. When the ratio of water to organic solvent becomes high enough, lignin self-assembles into spherical particles.…”

Section: Dry Particlesmentioning

confidence: 99%

Spherical lignin particles: a review on their sustainability and applications

et al. 2020

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“…It is generally known that electrostatic and van der Waals forces are not strong enough to form lignin nanoparticles. The strong π-π interactions among the abundant aromatic rings of lignin macromolecules are considered to be the main driving force for nanoparticle formation [17,33,37]. The π-π stacking of aromatic groups can form two distinct types of aggregates: J-and H-aggregates.…”

Section: Uv Blocking Performance Of Cel-np-blended Creammentioning

confidence: 99%

Preparation and Application of Light-Colored Lignin Nanoparticles for Broad-Spectrum Sunscreens

et al. 2020

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Recently, natural sun blockers have been drawing considerable attention because synthetic UV filters could have adverse effects not only on humans but also on the environment. Even though lignin, the second most abundant renewable resource on earth, is a natural UV-absorbing polymer, its unfavorable dark color hampers its applications in sunscreens. In this work, we obtained light-colored lignin (CEL) from rice husks through cellulolytic enzyme treatment and subsequent solvent extraction under mild conditions and compared CEL to technical lignin from rice husks using the International Commission on Illumination L*a*b* (CIELAB) color space. Spherical nanoparticles of CEL (CEL-NP) were also prepared using a solvent shifting method and evaluated for broad-spectrum sunscreens. A moisturizing cream blended with CEL-NP exhibited higher sun protection factor (SPF) and UVA PF (protection factor) values than that with CEL. In addition, CEL-NP had synergistic effects when blended with an organic UV-filter sunscreen: CEL-NP enhanced the SPF and UVA PF values of the sunscreen greatly. However, there was no synergistic effect between CEL-NP and inorganic sunscreens. We expect nanoparticles of light-colored lignin to find high-value-added applications as a natural UV-blocking additive in sunscreens and cosmetics.

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Preparation and formation mechanism of size-controlled lignin nanospheres by self-assembly

Cited by 205 publications

References 39 publications

Lignin for Nano‐ and Microscaled Carrier Systems: Applications, Trends, and Challenges

Lignin for Nano‐ and Microscaled Carrier Systems: Applications, Trends, and Challenges

Spherical lignin particles: a review on their sustainability and applications

Preparation and Application of Light-Colored Lignin Nanoparticles for Broad-Spectrum Sunscreens

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