BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Huali Zeng,Baojie Liu,Jiao Li,Mei Li,Meijiao Peng,Chengrong Qin,Chen Liang,Caoxing Huang,Xinping Li,Shuangquan Yao
Lignin separation is an important procedure that benefits multiple industries and in particular biomass transformation efforts. In this study, bagasse lignin was separated by freeze–thaw-assisted p -toluenesulfonic acid ( p -TsOH) pretreatment . The optimal conditions were freezing temperature −60 °C, freezing time 8.0 h, thawing temperature 15 °C, p -TsOH concentration 60%, pretreatment temperature 70 °C, and time 20 min. Lower acid concentrations and temperatures were used compared with traditional p -TsOH pretreatment. The efficiency and selectivity of lignin separation were improved. It was attributed to freeze-thawing, which provided a more efficient physical channel for the effective penetration of p -TsOH. The separation, extraction and purity of lignin were improved to 89.76%, 78.22% and 77.89%, respectively. High separation, high extraction, high purity and large molecular weight lignin samples were obtained. In addition, the recovery and reuse of p -TsOH was enhanced. This provided a new method for the efficient and clean separation of lignin.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yanli Wang,Junwei He,Liming Zou,Yao Lu,Yan Vivian Li
To address the shortcoming of Polyvinyl alcohol (PVA) fibers for food or medical packaging materials including low mechanical strength and poor water resistance, lignin (LN) was used as raw material, acetone/H 2 O as solvent to self-assemble into lignin nanoparticles (LNP) by adverse solvent precipitation approach, and then PVA/LNP composite fibers with different LNP contents were fabricated successfully by wet and dry spinning. Herein, vast hydrophilic hydroxyl groups in PVA decreased owing to the hydrogen bond between LN and PVA, Especially, with only 0.5 wt% loading of LNP into the PVA/LNP fibers, the diameter was 94.4 dtex, tensile strength was 10.1 cN/dtex (1279.8 MPa), initial modulus was 94.7 cN/dtex (12.0 GPa), the crystallinity was 56.7 %, the orientation was 97.1 %, and water contact angle was 103.1°. Compared with pure PVA fibers, the tensile strength of PVA/LNP-0.5 fibers was increased by 44.2 % and the contact angle was increased 37°. This work provides novel insights into obtaining lignin-reinforced PVA composite fibers with strong mechanical properties and excellent water resistance properties, indicating the potential of the PVA/LNP fibers for food or medical packaging application.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xin Wang,Shuyu Pang,Baojie Liu,Chen Liang,Shuangquan Yao,Chengrong Qin,Shuangfei Wang,Yang Liu
Lignin-carbohydrate complexes (LCC) present a significant barrier to pulp purification, and their oxidation mechanisms remain unclear. In this study, chlorine dioxide (ClO 2 ), a common oxidant in the paper industry, was used to treat LCCs from various plant sources. The chemical composition, structural changes, and reaction kinetics of LCC were analyzed. After ClO 2 oxidation, the LC bonds connected to syringyl (S)-type lignin structural unit and FA/ p CA structures in LCC were effectively degraded, whereas those connected to guaiacyl (G) and p -hydroxyphenyl propane (H)-type units remained stable. Kinetic studies revealed that under conventional oxidation conditions, the degradation rates of LCCs from bagasse, bamboo, and eucalyptus were 0.40, 1.12, and 1.75, respectively, with consumption amounts of 6.23 mg, 10.92 mg, and 15.48 mg. The differences in the degree of LCC oxidative degradation were determined by the composition of lignin structural units. The findings provide theoretical support for the action mechanism of ClO 2 on LCCs during the pulp purification process, and offer important guidance for optimizing the pulp purification process.
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Nanomaterials
·
2024
·Vol. 14
·期 11
·957
·
IF 4.4
Dan Li,Liheng Chen
The emergence of antibiotic-resistant bacteria necessitates the development of novel, sustainable, and biocompatible antibacterial agents. This study addresses cytotoxicity and environmental concerns associated with traditional silver nanoparticles (AgNPs) by exploring lignin, a readily available and renewable biopolymer, as a platform for AgNPs. We present a novel one-pot synthesis method for lignin-based AgNPs (AgNPs@AL) nanocomposites, achieving rapid synthesis within 5 min. This method utilizes various organic solvents, demonstrating remarkable adaptability to a wide range of lignin-dissolving systems. Characterization reveals uniform AgNP size distribution and morphology influenced by the chosen solvent. This adaptability suggests the potential for incorporating lignin-loaded antibacterial drugs alongside AgNPs, enabling combined therapy in a single nanocomposite. Antibacterial assays demonstrate exceptional efficacy against both Gram-negative and Gram-positive bacteria, with gamma-valerolactone (GVL)-assisted synthesized AgNPs exhibiting the most potent effect. Mechanistic studies suggest a combination of factors contributes to the antibacterial activity, including direct membrane damage caused by AgNPs and sustained silver ion release, ultimately leading to bacterial cell death. This work presents a straightforward, adaptable, and rapid approach for synthesizing biocompatible AgNPs@AL nanocomposites with outstanding antibacterial activity. These findings offer a promising and sustainable alternative to traditional antibiotics, contributing to the fight against antibiotic resistance while minimizing environmental impact.
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Communications Chemistry
·
2025
·Vol. 8
·期 1
·1-11
·
IF 6.2
Wang Min,Luo Xiongfei,Wang Qunying,Strehmel Veronika,Chen Zhijun,Li Shujun,Strehmel Bernd
Valorization of waste for chemical processes addresses a challenging task for the society. Soda lignin ( AL ) available in the pulp industry operated in a photocatalytic cycle CuX 2 / L (X: Br, Cl; L : Me 6 TREN: Tris[2-(dimethylamino)ethyl]amine) and to initiate radical photopolymerization of methyl methacrylate (MMA) with α-bromophenylacetate (EBPA) by exposure at 420 nm. This resulted in poly(methyl methacrylate) (PMMA ) exhibiting a dispersity <1.3 with CuX 2 /L loading of ≲ 52 ppm. Deactivator reduction increased dispersity. MMA, styrene, and benzyl methacrylate successfully served as monomers for chain extension and block copolymerization experiments. This worked with CuX 2 /L ≥ 6.5 ppm, although conventional radical polymerization additionally competed. Adding of sodium pyruvate enabled radical photopolymerization under air. Modification of lignin with an aryl sulfonate group resulted in a one-component photoinitiator. It successfully initiated radical photopolymerization of a monomer mixture of (hydroxyethyl)methacrylate (HEMA) and urethane dimethacrylate (UDMA). Scale-up experiments approved practicability of photo-ATRP.
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BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Kaili Zhang,Xiao Jiang,Ran Tao,Jingcong Xie,Jian Zhao,Ning Zhang,Yicun Chen,Yangdong Wang,Kui Wang,Jianchun Jiang
Lignin is an important component of plants, and its utilization is essential for biorefinery. Litsea cubeba fruit residues (LSRs) are abundant renewable lignin-rich bioresource with enormous potential for producing value-added monophenols. Herein, the lignin from LFRs was isolated with organic solvent, which was characterized by two-dimensional HSQC-NMR, FT-IR, Py-GCMS and GPC. The results indicate that the lignin in LFRs is mainly composed of guaiacyl (G) subunits (93 %), with small amounts of syringyl (S)/ p -hydroxyphenyl (H) structural subunits. The reductive catalytic fractionation (RCF) of LFRs was investigated using methanol (MeOH) as the solvent and a commercial Pd/C (5 wt% Pd) catalyst. Two major phenolic compounds, 4- n -propylguaiacol and 4- n -propanolguaiacol derived from β-O-4 structure, were generated with high yield (19.4 wt%). This result was different from G-type pine wood powder, where 4- n -propanolguaiacol was the main product with a selectivity of 93.8 %. Besides, the influences about several important reaction parameters like time, temperature, solvent, H 2 pressure, and catalyst stability were also investigated based on monophenol yields and average molecular weight. Overall, the lignin components of Litsea cubeba fruit residues were identified and transformed into high functional phenolic chemicals in this work.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xin Fu,Jianmin Peng,Xueren Qian
In this paper, cellulose-lignin films containing Fe 3+ were prepared by the codissolution-precipitation method, and the films have high transparency as well as high UV absorption. In this process, kraft lignin chelates with Fe 3+ and then bonds with cellulose through hydrogen bonding, evenly distributing within the film. The morphological results showed that the kraft lignin chelated with Fe 3+ bound tightly linked to cellulose within the Fe@cellulose-lignin composite films. The addition of Fe 3+ made the composite film (C-Fe -0.7 -L) maintain a high transmittance of 66.9 % at 600 nm with excellent UV absorption. Excellent UV absorption performance, completely shielded from both Ultraviolet A (UVA), Ultraviolet B (UVB), and Ultraviolet C (UVC), and improved the thermal stability of the film. Under 100 mW cm −2 solar irradiation, the temperature of C-Fe -0.7 -L rose rapidly to 60.7 °C. Based on this property, solar energy is transformed into kinetic energy, which realizes the photothermal conversion of solar energy. This work realizes the use of transparent films for energy utilization.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wenzhi Jiang,Yingchun Zhang,Dongjie Yang,Xueqing Qiu,Zhixian Li
Lignin-based silver nanoparticles have been considered a promising antimicrobial material. However, it remains challenging to prepare ultra-small size silver nanoparticles sustainably with superior antibacterial performance. In this work, we modified ethanol-extracted lignin (EL) with carboxymethyl groups and further synthesized ultra-small particle size (3.8 ± 0.1 nm) nanosilver incorporated carboxymethyl lignin complexes (AgNPs@CEL) using ultrasonic technology. Due to the outstanding antibacterial properties of the ultra-small size nanosilver, AgNPs@CEL could cause 5.3 and 5.4 log 10 CFU/mL reduction against E. coli and S. aureus in 5 min. Meanwhile, AgNPs@CEL exhibited remarkable photothermal antibacterial performance, which caused 6.2 and 6.1 log 10 CFU/mL reduction of E. coli and S. aureus , with NIR irradiation for 5 min. Furthermore, the composite films prepared by doping only 0.5 wt% AgNPs@CEL into ethyl cellose could achieve a bactericidal rate more than 99.99 %. This study provides a new insight into design of controlled particle size lignin-based antibacterial nanosilver materials in a sustainable manner and holds promise for applications in antibacterial fields.
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Polymers
·
2024
·Vol. 16
·期 7
·927
·
IF 4.7
Mingshan Wen,Hang Wang,Bole Ma,Fuquan Xiong
In this study, the photothermal performance of lignin-based nanospheres was investigated. Subsequently, a photothermal actuator was prepared using lignin-based carbon nanospheres (LCNSs). The results demonstrated that LCNSs exhibited an impressive photothermal conversion efficiency of up to 83.8%. This extreme efficiency significantly surpasses that of lignin nanospheres (LNSs) and covalently stabilized LNSs (HT-LNSs). As a structural material, a hydrophobic coating was effectively engineered by LCNSs on the filter paper, achieving a water contact angle of 151.9° ± 4.6°, while maintaining excellent photothermal effects (with a temperature increment from room temperature to 138 °C in 2 s). When employing hydrophobic filter paper as the substrate for the photothermaldriven actuator, under the influence of a 1.0 W/cm2power–density NIR laser, the material exhibited outstanding photothermal actuation, achieving speeds up to 16.4 mm/s. In addition, the direction of motion of the actuator can be adjusted in accordance with the location of the NIR light irradiation. This study offers valuable perspectives on the application of LNSs for highvalue applications and the development of innovative photothermal-driven actuators.
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GREEN CHEMISTRY
·
2013
·Vol. 15
·期 11
·3057-3063
·
IF 6.828
Feng Chen,Wenjing Zhou,Hongfei Yao,Ping Fan,Jintao Yang,Zhengdong Fei,Mingqiang Zhong
We demonstrate the self-assembly of highly dispersed NiO nanoparticles embedded in lignin-derived mesoporous carbon (MPC) frameworks. Self-assembly is induced by evaporation of the solvent from a mixture of metal-containing liquid crystalline mesophases of lignin-derived polymers and transition metal nitrate hydrate, which yielded NiO@MPC nanostructures at 600 °C under a N2 atmosphere. The microstructure and morphology of the NiO@MPC are characterized by XRD, TEM and BET. The results show that the NiO nanoparticles are highly dispersed in a mesoporous carbon matrix. The NiO@MPC composites show metal oxide contents in the range 49–79 wt%, high surface areas (503–802 m2 g−1), uniform pore sizes (≈3.7 nm), various porous distributions and large pore volumes (0.46–0.68 cm3 g−1). Electrochemical studies were carried out by measurement of cyclic voltammetry (CV) and charge–discharge tests. The results demonstrate that the NiO@MPC composites have high specific capacitance (880.2 F g−1 at a current density of 1.0 A g−1) and display good retention. 90.9% of the specific capacitance is retained when the current density changes from 1 A g−1 to 10 A g−1 in the charge–discharge tests and 93.7% of the specific capacitance is retained after 1000 charge–discharge cycles. Thus, the NiO@MPC composites are promising supercapacitor electrode materials.
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ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Feiyun Li,Cheng Cai,Hongming Lou,Yuxia Pang,Xinyi Liu,Xueqing Qiu
Enzymatic conversion of lignocelluloses into fermentable sugar is a key step in the production of cellulosic ethanol. In this work, enzymatic hydrolysis lignin (EHL)-grafted phosphobetaine (EHLPB) was prepared, and the phosphobetaine intermediate, 3-chloro-2-hydroxypropyl(2-(trimethylammonio)ethyl)phosphate, was synthesized from phosphocholine chloride calcium salt and epichlorohydrin. EHLPB showed a pH-sensitive response. When pH ≥ 5.0, it was completely dissolved in the buffer solution, whereas 95.5% of EHLPPB was precipitated when pH ≤ 3.0. Adding 1.2 wt % EHLPB-210 can increase the high-solid enzymatic digestibility of Eu-SPORL (sulfite pretreatment to overcome recalcitrance of eucalyptus) and CCR (corncob residue) from 33.6% and 52.6% to 71.5% and 73.6%, respectively. After the enzymatic hydrolysis of Eu-SPORL, 95% of EHLPB-210 was recovered by adjusting the slurry pH from 5 to 3. The recovered EHLPB-210 still kept the ability to enhance enzymatic hydrolysis of lignocelluloses. Adding 1.2 wt % recovered EHLPB-210 can increase the enzymatic digestibility of Eu-SPORL from 33.6% to 75.1%. Investigation of the adsorption of cellulase on lignin by sodium dodecyl sulfate–polyacylamide gel electrophoresis (SDS-PAGE) showed that EHLPB can significantly reduce the nonproductive absorption of cellulase on lignin and therefore enhance the enzymatic hydrolysis of lignocelluloses. By adding recoverable pH-responsive EHLPB, the enzymatic hydrolysis efficiency of lignocelluloses improved and the value-added utilization of enzymatic hydrolysis lignin was realized.
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RARE METALS
·
2024
·Vol. 43
·期 3
·1006-1016
·
IF 9.6
Chen Xin-Yang,Gao Xue-Jie,Wu Han-Yan,Liu Yu-Long,Yang Xiao-Fei,Sun Run-Cang
Quasi-solid-state lithium metal batteries (QSSLMBs) assembled with polyvinylidene fluoride (PVDF) are a promising class of next-generation rechargeable batteries due to their safety, high energy density, and superior interfacial properties. However, PVDF has a series of inherent drawbacks such as low ionic conductivity, ease of crystallization, and hydrophobic character that leading to poor cell properties. To tackle these issues, a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of QSSBs. The lithophilic polar groups of lignin can promote uniform deposition of Li on the electrodes. Cooperating with the improved mechanical properties can efficiently prevent Li dendrites penetration through the separator. In addition, more active sites provided by lignin can also enhance Li + transport and lead to a faster electrochemical reaction kinetic. Benefitting from the ingenious design, Li symmetric cells with 5% lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm −2 /5 mAh·cm −2 , while short-circuiting occurs after 56 h for the counterpart (pure PVDF). Moreover, a full cell of Li/5% lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g −1 after 2000 cycles at 10 C. This work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs. Graphical abstract
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危险品化学品经营许可证（带存储）