High-purity lignin fractions and nanospheres rich in phenolic hydroxyl and carboxyl groups isolated with alkaline deep eutectic solvent from wheat straw

Xin, Yue; Suopajärvi, Terhi; Sun, Shirong; Mankinen, Otto; Mikkelson, Atte; Huttunen, Harri; Komulainen, Sanna; Romakkaniemi, Idamaria Pinja Pauliina; Ahola, Juha; Telkki, Ville‐Veikko

doi:10.1016/j.biortech.2022.127570

Cited by 23 publications

(11 citation statements)

References 38 publications

(45 reference statements)

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“…In the 1 H NMR spectra of LNPs and ALNPs, the chemical shifts in the range of 11.8–11.3 ppm were associated with a proton in carboxy groups (−COOH), while the signal did not appear in MALNPs due to the formation of ester . The presence of −COOH and −NH 2 in ALNPs indicates its hydrophilic nature. , …”

Section: Resultsmentioning

confidence: 99%

Modified Lignin Nanoparticles as Potential Conservation Materials for Waterlogged Archaeological Wood

Zhang

Liu

Ke³

et al. 2023

ACS Appl. Nano Mater.

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Lignin is the most abundant component in archaeological waterlogged wood, making it a potential consolidant with high compatibility for historical wood conservation. However, its consolidation effect is limited by its low penetration into the wood. In this study, modified lignin nanoparticles (LNPs) were proposed for the first time as conservation materials for waterlogged archaeological wood. Two modified LNPs were prepared with low molecular weight, small size, and high solubility in ethylene glycol (EG) for consolidating waterlogged wood samples. These nanoparticles, hydrophilic aminated LNPs (ALNPs) and hydrophobic esterified LNPs (MALNPs), greatly improved the consolidation effect of waterlogged wood samples compared to LNPs. This was demonstrated by measuring their physical properties, dimensional stability, and mechanical properties. The surface color change was almost within the acceptable range for the human eye. We also discussed two different reinforcement mechanisms of ALNPs and MALNPs. ALNPs can form hydrogen bonds with hemicellulose/cellulose in the wood to strengthen the fragile wood cell wall, while MALNPs can fill the wood cell lumen to support the cell wall and prevent deformation during drying. Our work provides an approach of using biomaterials as consolidants for archaeological waterlogged wood and expands the use of lignin in this field.

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Section: Resultsmentioning

confidence: 99%

Modified Lignin Nanoparticles as Potential Conservation Materials for Waterlogged Archaeological Wood

Zhang

Liu

Ke³

et al. 2023

ACS Appl. Nano Mater.

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“…Therefore, the extended lignin macromolecular network shrinks and aggregates into particles driven by hydrophobic forces and π‐π interactions. [ 32 ]…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the extended lignin macromolecular network shrinks and aggregates into particles driven by hydrophobic forces and π-π interactions. [32] As shown in Figure 1a, the obtained particles were heterogeneous with diameters ranging from 20 to 100 nm. This is due to the high heterogeneity of lignin molecules, and molecules with high hydrophilicity tend to form small nanoparticles.…”

Section: Preparation Of Al-based Pickering Emulsion (Pe)mentioning

confidence: 91%

Biomass‐Based, Interface Tunable, and Dual‐Responsive Pickering Emulsions for Smart Release of Pesticides

et al. 2023

Adv Funct Materials

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The extremely low utilization efficiency of pesticides has driven people to develop low-cost, sustainable, and smart delivery systems. Pickering emulsion (PE) derived from biomass is an attractive candidate. However, the stability of PE is insufficient, and pesticide release from PE can be hardly tuned. Herein, a facile in situ PE modification strategy to construct a stable and high-performance pesticide delivery system from biomass resources is reported. In this process, PE stabilized by alkali lignin nanoparticles is initially prepared, and subsequently, opposite-charged chitosan (CH), and sodium lignosulfonate (SL) are alternatively deposited onto the PE interface through layer-by-layer assembly to form a microcapsule system (CH+SL)n@ PE. The resulting biomass-based microcapsules show improved stability, high encapsulation efficiency, and super UV protection to avermectin (AVM), a hydrophobic and photo-sensitive pesticide. Furthermore, the shell thickness of microcapsules can be finely tuned by controlling the deposited CH+SL layers, which enable (CH+SL)n@PE to have adjustable release behaviors. (CH+SL)20@PE prolongs the half-life of AVM under UV irradiation by 5.0fold. Moreover, (CH+SL)n@PE exhibits pH and laccase dual responsiveness, which is beneficial to the targeted release of AVM in vivo. Therefore, the current PE modification strategy can provide an eco-friendly, low-cost, and smart system for precise delivery of pesticides.

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“…Although carthamin from safflower has a great possibility to be applied more frequently to food, it appears to have the problem that the red color fades gradually when it is in high temperatures or an alkaline environment. The reason why we chose the pH values ranged from 6 to 10 for the single-factor optimization experiment was that carthamin includes phenolic hydroxyl groups, and the substances containing hydroxyl or phenolic hydroxyl groups are commonly extracted using alkali extraction and acid precipitation method. , Due to its acid insolubility, we chose alkaline conditions as the dissolution conditions for crude carthamin. Although carthamin is sensitive to alkaline conditions, according to the published research, the storage rate of carthamin was above 96% within 5 h and 85% within 24 h, and leaving it longer would cause degradation under pH 8–11 .…”

Section: Resultsmentioning

confidence: 99%

Optimized Separation of Carthamin from Safflower by Macroporous Adsorption Resins and Its Protective Effects on PC12 Cells Injured by OGD/R via Nrf2 Signaling Pathway

Zhang,

Shao,

Jin

et al. 2023

J. Agric. Food Chem.

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High-purity lignin fractions and nanospheres rich in phenolic hydroxyl and carboxyl groups isolated with alkaline deep eutectic solvent from wheat straw

Cited by 23 publications

References 38 publications

Modified Lignin Nanoparticles as Potential Conservation Materials for Waterlogged Archaeological Wood

Modified Lignin Nanoparticles as Potential Conservation Materials for Waterlogged Archaeological Wood

Biomass‐Based, Interface Tunable, and Dual‐Responsive Pickering Emulsions for Smart Release of Pesticides

Optimized Separation of Carthamin from Safflower by Macroporous Adsorption Resins and Its Protective Effects on PC12 Cells Injured by OGD/R via Nrf2 Signaling Pathway

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