ACS Applied Bio Materials
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2022
·
IF 0
Yingchun Zhang,Dongjie Yang,Xueqing Qiu,Zhixian Li
Green and controllable preparation of silver nanoparticles (AgNPs) remains a great challenge. In this work, ethanol-extracted lignin-based nanosilver composites (AgNPs@EL) were synthesized at room temperature with the assistance of ultraviolet (UV) radiation. The ethanol-extracted lignin (EL) could serve as natural dispersion carriers and reducing agents for AgNPs. The reducing ability of EL could be further improved under UV irradiation, which enables the rapid synthesis of AgNPs at room temperature. More importantly, due to the good photothermal conversion capacity of EL, AgNPs@EL exhibits remarkably enhanced photothermal performance and excellent photothermal antibacterial ability, which could cause 7.2 and 5.3 log10 CFU/mL reduction against Escherichia coli and Staphylococcus aureus, respectively, under near-infrared (NIR) irradiation (808 nm, 1.8 W/cm2) for 5 min. Furthermore, the composite film obtained by impregnating bacterial cellulose onto AgNPs@EL solution also shows significantly improved mechanical properties and photothermal antimicrobial activity. Therefore, this work may provide insights into the design of lignin-based photothermal-mediated antimicrobial materials.
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INDUSTRIAL CROPS AND PRODUCTS
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2013
·
IF 2.468
Xiaohuan Liu,Jifu Wang,Shouhai Li,Xiaowei Zhuang,Yuzhi Xu,Chunpeng Wang,Fuxiang Chu
The aim of this study was to develop economically UV-absorbent and visible-transparent films. For this purpose, lignin was selected because of its strong ultraviolet (UV) absorbing property. Lignocellulosic butanol residue, as the by-product of lignocellulosic butanol production, is rich in biobutanol lignin (BBL). Herein, BBL was modified with acryloyl chloride and then copolymerized with n-butyl acrylate (BA) and methyl methacrylate (MMA) by free-radical polymerization. The chemical structure of poly(BA-co-MMA) chains was identifiable by 1 H NMR and 13 C NMR spectroscopies, combined with UV–visible spectra to confirm the existence of the aromatic groups that are attributed to BBL in the copolymer . This provided evidence that a BBL graft copolymer was successfully synthesized. The optical, photo-stability, chemical resistance, thermal and mechanical properties of the copolymer were evaluated. The copolymer film can absorb 96.2% of UV light, while allowing 70% or higher transmittance in the visible spectrum when the surface concentration of BBL-AC was 240 μg cm −2 . In addition, the copolymer film retained excellent absorption capacity in the UV region and high transparency in the visible light region after 75 min continuous UV-irradiation or when heated at 100 °C, rendering it potential to use as a UV-absorbent film. The copolymer exhibited good chemical resistance, thermal and mechanical properties compared with pure poly(BA-co-MMA). This strategy not only provides a novel approach for UV-absorbent films but also greatly extends the comprehensive utilization of BBL.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zhuoyu Wang,Jiajia Shan,Kunpeng Yu,Lang Huang,Qiong Wu
In response to the critical challenges of high toxicity, complex synthesis, and poor environmental stability in conventional room-temperature phosphorescent materials, this study presents a sustainable biomass-derived strategy through the development of lignin-based carbon dot/inorganic salt composites (CDSL X -T). By employing a one-step molten salt approach, we construct a hierarchical architecture featuring lignin-derived sp 2 -hybridized carbon cores and a rigid crystalline shell comprising multi-component inorganic salts (MgO/Mg 3 (PO 4 ) 2 /KCl/KNO 3 ). The inherent conjugated moieties of lignin facilitate efficient intersystem crossing, while nitrogen doping optimizes (n, π*) electronic configurations to enhance spin-orbit coupling effects. In situ characterization elucidates the synergistic mechanism of high-temperature-induced carbon core aromatization and salt matrix crystallization. A dual confinement strategy-combining covalent bonding (C-K/C-Cl/C-Mg) and spatial restriction-effectively suppresses carbon dot vibrations and non-radiative triplet exciton transitions, enabling stable phosphorescence emission in aqueous environments. Leveraging time-resolved luminescence characteristics with tunable lifetimes, the material demonstrates unique potential in fingerprint visualization and multilevel information encryption. This work establishes an eco-friendly synthetic paradigm for high-performance bio-based optical materials, bridging sustainable chemistry with advanced photonic applications.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Chengyin Lin,Yongyuan Deng,Yuankai Lin,Jun Li,Junling Tu,Riyang Shu
Hydrodeoxygenation (HDO) represents a highly efficient refining pathway to convert lignin-derived phenolic compounds for the production of hydrocarbon fuels, and the selection of a suitable catalyst is pivotal for a high reaction efficiency. In this study, we introduce a novel highly dispersed Pt/Al2O3–TiO2 composite catalyst that is prepared via a photochemical reduction method and employ it for the HDO of lignin-derived phenolic compounds. The catalyst demonstrates a good HDO performance, achieving complete conversion of guaiacol at 260 °C with cyclohexane selectivity of 99.9%. Catalyst characterization results reveal that the Pt/Al2O3–TiO2 catalyst exhibits a high Pt metal dispersion. Besides, the composite support synergistically combines the properties of Al2O3 and TiO2 components, resulting in a high specific surface area, moderate acidity, and abundant oxygen vacancy. These factors facilitate the provision of numerous active metal sites and acid sites those are essential for the HDO reaction. Moreover, the Pt/Al2O3–TiO2 catalyst also shows a high activity on the HDO of various other phenolic compounds. When applied to the upgrading of lignin oil, the catalyst significantly increases the hydrocarbon content from 18.9% to 92.2%, concurrently reducing the oxygen content and substantially increasing the hydrogen content of the lignin oil. The calorific value is significantly enhanced, underscoring the potential of the Pt/Al2O3–TiO2 composite catalyst to upgrade lignin-derived phenolic compounds into high-quality hydrocarbon liquid fuels.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Weisheng Yang,Liang Jiao,Xiu Wang,Weibing Wu,Hailan Lian,Hongqi Dai
Most phenolic resins are synthesized with non-renewable petroleum-based phenol and formaldehyde, which have adverse effects on the environment and human health. To achieve green and sustainable production of phenolic resins, it is important to replace non-renewable toxic phenol and formaldehyde. Herein, a new strategy was proposed to completely replace phenol and formaldehyde, using lignin-derived monomers to synthesize renewable phenolic resins. Lithium aluminum hydride was utilized to reduce lignin-derived monomers, including vanillin , methyl vanillate, and syringaldehyde, to generate the corresponding vanillyl and syringic alcohol. With oxalic acid as the catalyst, vanillyl and syringic alcohol could be polymerized to phenolic resins without using formaldehyde. The structure of the phenolic resins based on lignin-derived monomers was analyzed by Fourier transform infrared spectroscopy and 13 C and 31 P nuclear magnetic resonance spectroscopy. Differential scanning calorimetry and thermogravimetric analysis were performed to characterize the thermal properties of the phenolic resins. The phenolic resins based on lignin-derived monomers exhibited excellent adhesion strength (6.14 MPa), glass transition temperature (T g ) (107–115 °C), and thermal stability , and its performance was similar to that of the commercial Novolak phenolic resin. This study presents a promising green and sustainable approach to synthesize renewable phenolic resins based on lignin-derived monomers without using formaldehyde.
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CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Siqi Huang,Su Shuyi,Haibo Gan,Wu Linjun,Chaohui Lin,Xu Danyuan,Haifeng Zhou,Xuliang Lin,Yanlin Qin
In this study, hydroxyethyl cellulose (HEC) and polyvinyl alcohol (PVA) as the framework, borax as the cross-linker, and biomass lignin from pulping black liquors and biorefinery as the plasticizer were used to synthesize the lignin-based HEC-PVA (LCP) self-healing conductive hydrogel with highly stretchable and thermosensitive properties by the one-step fabrication method. Compared with the PVA hydrogel, the maximum storage modulus and the elongation rate was increased by 7 times and 20 times, respectively. Uniformly distributed lignin could increase the mobility and distance of polymer molecular chains, therefore improve the viscoelasticity and stretchability of the LCP self-healing hydrogel. The LCP hydrogel could recover to the original state in 12 s after 10000% shear strain for 4 cycles. The LCP hydrogel also presented good thermosensitivity and electrical conductivity, and were very promising for applications in the fields of 3D printing and wearable electronic devices, that broadened the efficient utilization of biorefinery lignin.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Qingxuan Yin,Shumin Wang,Haoyu Deng,Junyou Shi,Dan Zhang,Wenbiao Xu
Understanding the structural diversity of lignin is crucial for its efficient conversion into high-value aromatic compounds. However, the impact of lignin's structural characteristics from artificial forests on catalytic depolymerization is not well understood. This study investigates the structural differences in lignin from larch trees of varying ages (10, 20, and 40 years) and anatomical parts (heartwood, sapwood, canopy, bark) to understand how these variations influence catalytic depolymerization. Polyoxometalates (POMs) were selected as catalysts due to their high efficiency in facilitating the conversion of lignin into valuable chemical products. By utilizing POMs for catalytic oxidation, we explore the relationship between lignin structure and depolymerized products, providing insights into the structural features of larch lignin. Our findings reveal that the β-O-4 content of heartwood lignin is as high as 78.7 %, while that of the canopy is lower at 67.1 %. Additionally, the unique lignin structure significantly impacted the yield and selectivity of aromatic monomers, with the highest monomer yield from heartwood lignin reaching 15.64 %, compared to the lowest yield of 7.46 % from canopy lignin. These results lay a theoretical foundation for developing efficient biomass conversion technologies and offer novel strategies for sustainable biomass utilization and environmentally friendly production.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xin Wang,Dayong Huang,Yang Liu,Shuangquan Yao,Chengrong Qin,Shuangfei Wang,Chen Liang
Understanding the chemical structural differences of key components at varying bamboo heights enhances knowledge of its biological properties and adaptive mechanisms, promoting its high-value utilization. In this study, lignin and lignin-carbohydrate complexes (LCC) were extracted from the base, middle, and top sections of bamboo culms, and the chemical composition, micro-regional distribution, and structural characteristics of key components were analyzed. Results showed that both lignin and hemicellulose contents followed the trend: top > base > middle. The size and number of fiber cells decreased progressively from the base to the top, with lignin content most abundant in the cellular tissues at the top, where the S/G structural unit ratio was also the highest. Lignin-ferulic acid (FA)-carbohydrate complexes were identified as major recalcitrant structures in LCCs across different bamboo heights. These findings offer key insights into the chemical structural differences of lignin and LCCs at various bamboo heights, providing a scientific foundation for understanding bamboo's biological characteristics and facilitating its high-value applications.
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高影响因子
ChemSusChem
·
2025
·
IF 6.6
Qian Jiang,Zuzhi Li,Javier Remón,Hui Xin,Zhicheng Jiang,Bi Shi
Finding new catalytic applications for tannin, a biomass resource, exploiting its structural features and renewable nature, helps contribute toward carbon neutrality in catalysis. In this study, novel Pd-supported, carbon-neutral catalysts have been synthesized using tannic acid. First, tannic acid was cross-linked and coated on the surface of nano-SiO2. This material was then subjected to controllable carbonization, with the temperature being optimized, to obtain the catalyst support SiO2@TA-T (T: carbonization temperature). Experimental results demonstrated that carbonizing at 400 °C remained part of the phenolic hydroxyls of tannin with satisfactory reducing ability. Meanwhile, the condensation and the deoxygenation of tannin increased the thermal stability of this support and introduced porous structures and abundant defect sites. This material was then used to adsorb and in situ reduce Pd2+ to develop Pd-based catalysts. To this end, this synthesized Pd/SiO2@TA-400 catalyst was then used to hydrogenate vanillin, with a conversion of 99% to vanillyl alcohol at a pressure of 0.5 MPa initial H2 and a temperature of 20°C for 60 min. Such remarkable results were corroborated in the hydrogenation of several lignin-derived aromatic aldehydes, with our catalyst achieving high conversion and outstanding recyclability (5 recycles).
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高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Jinlong Zhang,Shiyu Fu,Hao Liu,Juanli Shen,Xi Yuan,Xuepei Zhou
Bioplastics based on lignin-containing cellulose nanofibrils (LCNF) have emerged as attractive alternatives to petrochemical plastics. However, the preparation of LCNF-based bioplastics with excellent wet-mechanical properties and water stability remains challenging. This study reports a sustainable route for the preparation of LCNF-based bioplastics with excellent wet mechanical properties and water stability. First, a deep eutectic solvent was employed to pretreat the bamboo powder to partially remove lignin. Then, the pretreated bamboo powder was esterified by one-step maleic anhydride (MAH) esterification to produce maleic anhydride-esterified LCNF (MLCNF). MLCNF exhibits a high aspect ratio (337), fine diameter (4.6 nm), and high surface charge (1.67 mmol/g). These properties endow MLCNF bioplastics with excellent wet elongation at break (41 %, significantly higher than other cellulose-based bioplastics), wet tensile strength (43.5 MPa), wet toughness (9.8 MJ m −3 ), dry tensile strength (164 MPa), dry toughness (15.7 MJ m −3 ), thermal stability, hydroplastic properties, and water stability (water contact angle: 91°). This research provides a straightforward, eco-friendly, and efficient approach for developing bioplastics with excellent wet mechanical properties and water stability using renewable lignocellulosic resources, with the potential to replace petrochemical plastics.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Wangda Qu,Zizhu Zhao,Chen Liang,Pengyu Hu,Zhongyi Ma
To achieve lignin valorization, we reported a simple method to direct covert lignin into carbon foam materials in this work. Unlike multiple steps required to fabricate traditional carbon foams from most of other precursors (often non-renewable), the approach herein required solely heating for carbon production. We found that the intrinsic features of lignin render the formation of lignin block meanwhile generate the porous structure under the invented heating course. Three key factors including glass transition temperature , crosslinking ability, and thermal stability of lignin were identified to determine the successful fabrication of lignin foam (i.e., precursor of carbon foam). Upon tuning the heating profile or fractionating the lignin, lignin foam with different morphologies and properties were obtained. After carbonization, the selected lignin-derived carbon foams possessed well porous structures with bulk densities of 0.52 or 0.62 g cm −3 , superior integrity with strength properties of around 10 MPa, BET surface areas of 143.29 or 325.86 m 2 g −1 , and many other attractive properties. This work is expected to stimulate further seek of lignin valorization in carbon foam production.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 45
·24065-24074
·
IF 11.301
Weisheng Yang,Xiu Wang,Liang Jiao,Huiyang Bian,Yongzheng Qiao,Hongqi Dai
Lignin, a renewable and low-cost biopolymer, has been widely reported as an energy-storage material. The energy-storage capability of lignin primarily originates from the redox of its internal quinone group. Hence, effective optimization of the lignin structure is of great significance for increasing the quinone group content, which is vital for improving the energy-storage performance of lignin-based electrode materials. Herein, synthetic polymers (SPs) with an extremely high quinone group content were prepared using lignin-derived aromatic monomers (LDAMs) as precursors. The chemical structure of the SP samples was analyzed using 13C and 31P NMR, and the results showed that their quinone content was as high as 5.49–6.75 mmol g−1, which is 6–7 times higher than that of commercial kraft lignin (KL). The RGO/SP composite was prepared using ultrasound-assisted self-assembly, and as expected, the SP coupled with reduced graphene oxide acquired a high specific capacitance of 352–465 F g−1, which is 1.4–1.9 times higher than that of RGO/KL. In addition, the RGO/SP electrodes showed an excellent rate performance of 265–365 F g−1 at 10 A g−1. Overall, our strategy provides a possibility for the preparation of high-performance lignin-based energy-storage materials.
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