INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Penghui Li,Chi Yang,Dairenjie Yi,Sixian Li,Mingkang Wang,Huan Wang,Yongcan Jin,Wenjuan Wu
Lignin is the most abundant aromatic biomass resource in nature and is the main by-product of paper industry and biorefinery industry, which has the characteristics of abundant source, renewable and low cost. Deep eutectic solvents (DES) are a nascent environmentally friendly solvent option that is gaining traction. DES composed of p -toluenesulfonic acid and choline chloride is used for batch treatment of alkaline lignin, and the bio-oil obtained is ternary polymerized with formaldehyde and phenol to obtain lignin phenolic resin. The porous carbon material is produced through a two-step carbonization process, utilizing phenolic resin derived from lignin as the primary source of carbon. The morphology and composition of the carbon were analyzed by SEM, TEM, XRD, TGA , XPS and Raman spectroscopy , the specific surface area and pore size distribution were analyzed by BET. The results showed that the specific surface area of the lignin-based phenolic resin was significantly higher than that of the pure phenolic resin carbon, and the porous carbon material that was acquired demonstrated a specific surface area of as much as 1026 m 2 /g. In the three-electrode system, the specific capacitance of DLPFC can reach 245.8 F/g (0.25 A/g), with a very small decrease in the value of specific capacitance at 10,000 cycles, with a retention of 97.62% (10 A/g). The porous carbon demonstrated a specific capacitance of 112.4 F/g at a current density of 0.5 A/g, and the capacitance retention rate could still reach 98.8% after 5000 charge/discharge cycles, with high cycling stability (in the two-electrode system). The prepared symmetrical supercapacitors exhibited high energy density and power density of 3.9 Wh/kg and 125.0 W/kg. The results suggest a new idea of high value-added application of lignin phenolic resin for high-performance supercapacitor electrodes.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Jiayi Zheng,Liheng Chen,Xueqing Qiu,Yingchun Liu,Yanlin Qin
Lignin is the most abundant natural phenolic polymer. However, the severe condensations of industrial lignin resulted in an undesirable apparent morphology and darker color, which hindered its application in the field of daily chemicals. Therefore, a ternary deep eutectic solvent is used to obtain lignin with light-color and low condensations from softwood. The results showed that the brightness value of lignin extracted from aluminum chloride-1,4-butanediol-choline chloride at 100 °C and 1.0 h was 77.9, and the lignin yield was 32.2 ± 0.6%. It is important that 95.8% of β-O-4 linkages (β-O-4 and β-O-4′) was retained. Lignin is used to prepare sunscreens and is added to physical sunscreens at 5%, with SPF up to 26.95 ± 4.20. Meanwhile, enzyme hydrolysis experiments and reaction liquid composition tests were also conducted. In conclusion, a systematic understanding of this efficient process could facilitate high-value utilization of lignocellulosic biomass in industrial processes.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Anlin Zhang,Jianzhong Zhang,Lina Liu,Jinfeng Dai,Xinyu Lu,Siqi Huo,Min Hong,Xiaohuan Liu,Mark Lynch,Xuesen Zeng,Paulomi Burey,Pingan Song
Fabricating a high-performing thermoset using bio-based flame retardant is critical for the sustainable development of engineering materials with superior fire safety and robust mechanical properties . Herein, the epoxy (EP) composites with the industrial requirements are manufactured with a novel high-efficient, lignin-based flame retardant named DAL- x , which is fabricated by grafting 9, 10-dihydro-9-oxa-10-phosphaze-10-oxide (DOPO) onto lignin. The resulting DAL- x /EP composite exhibits excellent flame retardancy with a desirable UL-94 V-0 rating and a satisfactory limiting oxygen index (LOI) of 29.8% due to the appropriate phosphorus content of DAL- x with adjustable molecular chain structure. Moreover, the DAL- x /EP composite shows an unexpected improvement in the elastic modulus (∼36%) and well-preserved strength and ductility compared with those of pure EP. This work offers a feasible strategy for creating efficient bio-based flame retardants utilizing industrial waste lignin and preparing high-performance EP composites that meet the demanding requirement of fire retardancy in industries, contributing to the circular economy and sustainability.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Simin Lin,Chunmei Lai,Zejie Huang,Wei Liu,Lei Xiong,Yuxin Wu,Yanqiao Jin
Synthesis of lignin-based carbon dots (LCDs) with high quantum yield (QY), stable fluorescence properties and biocompatibility has been a challenge. Here, we propose an improved two-step strategy for producing high-quality LCDs from enzymatic hydrolysis lignin (EHL). The p-aminobenzenesulfonic acid used in the strategy not only provides nitrogen and sulfur elements, but also tailors the disordered three-dimensional structure of EHL. The successful co-doping of N and S elements favors the reduction of the optical energy bandgap (E g ), resulting in a high QY of 45.05% for LCDs. The LCDs exhibited superior selectivity and sensitivity for Fe 3+ with a limit of detection (LOD) of 0.15 μM when Fe 3+ concentration was 50–500 μM. In addition, LCDs demonstrated significant fluorescence in HepG2 cells and HepG2 cells loaded with LCDs at a concentration of 80 μg/mL showed good viability, suggesting that they are suitable for in vivo applications. The luminescent centers of LCDs change during pH regulation and thus show a special visual response to pH changes, making them have great potential for detecting metabolism in living cells. This work provides a novel and low-cost method for fabricating sustainable fluorescent probes for chemical sensing and bioimaging.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jiahao Du,Huan Wang,Zhiyi Huang,Xiaochun Liu,Xinshan Yin,Jianxin Wu,Wenjing Lin,Xiaofeng Lin,Guobin Yi
Lignin is a natural polymer with abundant functional groups with great application prospects in lignin-based polyurethane elastomers with self-healing abilities. In this study, a lignin self-healing polyurethane (PUDA-L) was specially designed using lignin as the raw material of polyurethane, combining lignin with Diels-Alder (DA) bond and hydrogen bonds . The experimental results showed that PUDA-L was prepared with good thermal stability , fatigue resistance, shape memory effect, excellent mechanical strength, and self-healing ability by partially replacing the crosslinking agents with bio-based lignin and hydroxylated modified lignin to increase the hydroxyl content. Polyurethane has a tensile strength of up to 29 MPa and an elongation at break of up to 500 %. The excellent self-healing ability of PUDA-L originates from the internal DA bonds and cross-linked hydrogen bonds. After the dumbbell sample was fused and heated at 130 °C for 4 h, the elastomer could be completely healed, the tensile strength was restored to 29 MPa, and the self-healing efficiency was up to 100 %. The developed PUDA-L elastomer has promising applications in sensors and smart skins.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Weiqi Guo,Shirong Sun,Ping Wang,Haonan Chen,Jiayi Zheng,Xuliang Lin,Yanlin Qin,Xueqing Qiu
This work demonstrates an organic solvent fractionation method for lignin homogenization, which can effectively reduce the lignin heterogeneity and use each lignin fraction to prepare polyurethane foams (PUFs) with excellent mechanical properties. Such fractions were fully characterized by GPC , NMR ( 31 P, 2D-HSQC), FTIR , and TG to obtain a detailed description of the structures and properties. The properties of PUFs from each lignin fraction showed higher compatibility than that from unfractionated industrial lignin, as studied by morphology and DSC analysis. The improvement of compatibility between the fractionated lignin fractions and polyethylene glycol can effectively enhance the mechanical properties of the prepared PUFs. The hysteresis loss (43.10%–51.85%) and resilience (95.81%–98.81%) of the fractionated lignin polyurethane foams (LPUFs) were better than that from the unfractionated LPUFs (hysteresis loss 41.64%, resilience 94.67%) at the lignin content of 5%. Subsequently, the strong relationships between lignin structures and PUF properties were demonstrated in detail. The suggested approach provides greater possibilities to prepare LPUFs with tunable properties based on real industrial lignin fractions, rather than modified lignin.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Jingyu Wang,Dezhe Fan,Lizhu Zhang,Dongjie Yang,Xueqing Qiu,Xuliang Lin
Biomass-derived porous carbon is a promising antibiotic adsorption material due to its abundant reserves, low cost, and eco-friendly features. However, most biomass-derived porous carbon exhibits undesirable performance in the adsorption of high-molecular-weight antibiotics, which is attributed to the large mass transfer resistance during the adsorption process. Herein, we employ lignosulfonate (LS) as the biomass carbon source and CaCO 3 as the activator to fabricate lignin-derived hierarchical porous carbon (LPC-CaCO 3 ) which possesses a high surface area (2944 m 2 /g) and a large pore volume (1.406 cm 3 /g). Moreover, we demonstrate uniform mixing and simultaneous pyrolysis of carbon resources and activators are essential to the formation of interconnected pores. Large numbers of connected pores effectively reduce the mass transfer resistance. LPC-CaCO 3 exhibits high adsorption capacity to low-molecular-weight antibiotics (sulfamethazine) and high-molecular-weight antibiotics (tylosin) in both batch and column modes. The adsorption performances of LPC-CaCO 3 to antibiotics, especially high-molecular-weight antibiotics, are superior to most other reported biomass-derived carbons, commercial activated carbons, and petroleum-derived carbons. This work presents an effective strategy to fabricate a high-performance antibiotics adsorbent from biomass resources and provides deep insight into the structure–activity relationship of porous antibiotics adsorbents.
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Biomass Conversion and Biorefinery
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2022
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IF 4.05
Nie Kai,Liu Shaoyang,Zhao Tao,Tan Zhijian,Zhang Yuanming,Song Yan,Li Boya,Li Linlin,Lv Wanwan,Han Guangting,Jiang Wei
Efficient fractionation and valorization of biomass major components are important for biomass utilization. Deep eutectic solvent (DES) treatment is a promising method for biomass processing. In this study, a choline chloride oxalic acid dihydrate (ChCl-OA) DES treatment method was developed to efficiently separates biomass components and isolate the lignin from bamboo. Hemicellulose (from 16.2 to 3.2%) and lignin (from 27.4 to 4.9%) components in recovery solid were significantly reduced. Results revealed that the DES-extracted lignin (DESL) had a higher yield (82.1%) and purity (94.9%), but a lower molecular weight (1148 g/mol) compared with the milling wood lignin (MWL) and alkali lignin (AL). Meanwhile, the DESL from the acid DES pretreatment of bamboo biomass was beneficial to the preparation of stable and homogenous lignin nanoparticles (LNPs). This study provides an efficient method to separate the main components of biomass and prepare LNPs. The DES treatment showed great potential for biomass component fractionation and lignin valorization.
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Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Chen Jiajia,Xiu Pengcheng,Gu Xiaoli
Lignin is the world’s greatest renewable aromatic biomass resource, with considerable potential for the development of high-value-added compounds. Herein, wet impregnation was employed to create Co-Mo/ATP-CZO bimetallic catalysts, which were then used to catalyze the depolymerization of lignin in ethanol and isopropanol. The findings of the characterization revealed that doping Mo metals resulted in the change of metallic oxide phase, which increased the oxygen vacancy (O V ), improved metal-carrier interaction, and decreased acid center content. The results of the experiments demonstrated that catalytic hydrogenation with a 12Mo-20Co/ATP-CZO catalyst at 240 °C for 8 h produced the maximum yield of bio-oil (57.44 wt%, including 37.58 wt% of monomer). Under these conditions, the bio-oil had a higher heating value of 33.20 MJ/kg, which was significantly higher than the alkali lignin’s 19.62 MJ/kg. Catalyst stability tests also revealed good recyclability. This research will provide an efficient method for depolymerizing lignin. Graphical abstract
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2022
·Vol. 30
·期 10
·4287-4303
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IF 4.705
Shi Liang,Liu Wenwu,Zhang Xiaomei,Hu Jingsong
In this study, an environmentally friendly lignin-based hybrid hydrogel (LS/OMMT) was prepared by grafting of acrylamide (AM) and acrylic acid (AA) onto calcium lignosulfonate (LS) and homogeneously distributing organic montmorillonite (OMMT) using an ultrasonic technique. FT-IR, XRD, TGA, SEM, EDS, BET, and XPS were used to characterize the physicochemical and structural properties of LS/OMMT. Then, LS/OMMT was applied to remove methylene blue (MB) from an aqueous solution and a systematic study of pH, contact time and initial MB concentration was carried out. The MB adsorption capacity on LS/OMMT was up to 492.7 mg g −1 at 313.15 K and pH 7.0. The Langmuir model well described the MB adsorption on LS/OMMT and the calculated thermodynamic parameters, such as ΔG°, ΔH°, and ΔS°, suggested that MB adsorption on LS/OMMT was spontaneous and endothermic. LS/OMMT adsorption of MB followed a pseudo-second-order kinetic model. Electrostatic attraction and hydrogen-bonding interaction were the mechanisms of adsorption. As a result, this study illustrates that LS/OMMT is an environmentally friendly and efficient adsorbent for wastewater treatment applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Rongtao Liu,Yiyu Pang,Tianhua Xiao,Shiyang Zhang,Yidong Liu,Yonggang Min
Polycaprolactone (PCL) nanofibers have become an ideal material for bone tissue engineering due to a series of advantages. Considering the clinical treatment of bone defects, in addition to meeting the golden standard, PCL based nanofibers also need to be multifunctional to anti-inflammatory, antibacterial properties, and enhance the bone regeneration and repair. Herein, we successfully developed the multifunctional PCL/LIG/ZIF-8 composite nanofibers by loading ZIF-8 on electrospun PCL/lignin (PCL/LIG) nanofibers. The prepared composite nanofibers exhibit fairly good wettability and acceptable degradation rate, as well as excellent antioxidative stress and antibacterial properties originating from the incorporated LIG and loaded ZIF-8. Moreover, owing to the synergistic effect of LIG and ZIF-8, the composite nanofibers present excellent osteogenic differentiation, which can be verified in biomineralization experiments and real-time quantitative polymerase chain reaction. These results indicate that the PCL/LIG/ZIF-8 composite nanofibers, as potential healthcare candidate, have a promising applied in the treatment of bone defects.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Yu Cheng,Jiaxian Lin,Yuanyuan Zheng,Xinyi Chen,Chunhong Lu
Water-soluble synthetic poly(vinyl alcohol) (PVA) polymers can be used as a raw material for high-performance solution-spun fibers. To enhance the biodegradability and physical properties of PVA fibers, lignin has been considered a low-cost, biobased filler/additive for PVA fibers. However, its amorphous structure and hydrophobic nature cause difficulty in developing lignin-reinforced PVA high-performance fibers due to the poor compatibility of amorphous lignin and linear semicrystalline hydrophilic PVA. Herein, the graft copolymerization of organosolv lignin (OL) and acrylic acid (AA) was performed at different reaction durations to yield hydrophilic lignin copolymers, which had enhanced compatibility with polar synthetic PVA. Chemically modified OL with reaction durations of 0, 12, and 24 h was incorporated into PVA fibers by gel spinning. With 5% modified OL from 24 h of reaction time, the composite fibers had an excellent tensile strength of 1.15 GPa, which was 61.4% higher than that of neat PVA fibers. This fiber’s Young’s modulus (13.09 GPa) and toughness (26 J/g) were also substantially enhanced when compared with those of the neat PVA fibers (Young’s modulus of 8.97 GPa and toughness of 18.09 J/g). This work enables the high-value utilization of a modified lignin filler in synthetic fibers for potential applications in industrial or technical textile fields.
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