Journal of Cleaner Production
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2024
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IF 9.7
Lizheng Yang,Yingqi Heng,Jianping Sun,Dongying Hu,Fangchao Cheng
Conventional supercapacitors face narrow voltage and an inevitable reduction in capacitance retention during operation, significantly preventing its further commercial application. So, biomass-derived composite materials have attracted intensive attention, especially for pseudocapacitive supercapacitors. Herein, a high-end utilization strategy of lignin to induce a 3D porous layered MXenes/graphene oxide hybrid electrode (LGM 2 -80) and homologous gel electrolytes with low interface resistance for lignin-derived supercapacitors is demonstrated by a simple hydrothermal method. A more uniform distribution and smaller nanospheres ≈<10 nm of lignin prevent the restacking and increase the interlayer spacing of graphene oxide, also play an adhesive role between graphene oxide and MXene, guaranteeing the maximization of the pseudocapacitance effect between lignin and MXene. Consequently, the LGM 2 -80 electrode showed a wide operating potential (−0.7∼1.0 V), breaking through the bottleneck of MXene-derived devices with limited working voltage (typically≤0.6 V). Furthermore, the lignin-derived symmetric quasi-solid-state supercapacitor (LGM 2 -80//lignin gel//LGM 2 -80) possesses an excellent capacitance retention rate of 149 % at 5,000 cycles, which is far exceeding the current reported supercapacitors. This innovative use of lignin opens up new perspectives for ultra-voltage and ultra-high capacitance retention of advanced supercapacitors.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Qi Ye,Fei Ge,Xiaohui Yang,Minghao Zhou
The catalytic oxidative depolymerization of lignin and its dimers is key for the effective utilization of biomass. In this work, a metal–organic framework (MOF) was chosen as the precursor, and a series of nickel–manganese bimetallic catalysts with different metal ratios were prepared via a hydrothermal method using 1,3,5-tricarboxylic acid as the ligand. The effects of metal ratio and calcination temperature on the activity of the catalyst were considered, and the oxidative depolymerization of the lignin dimer (2-phenoxy-1-acetophenone) was investigated in detail. The selective conversion of 2-phenoxy-1-acetophenone was achieved over the Ni2Mn1-MOF catalyst in an oxygen atmosphere with methanol as the solvent. Through the optimization of different reaction parameters, including reaction temperature, oxygen pressure, reaction time and solvent, it was found that under optimal reaction conditions (140 °C, 4 h, 0.5 MPa O2), the Ni2Mn1-MOF catalyst exhibited a good catalytic performance for the efficient conversion of 2-phenoxy-1-acetophenone to phenol and methyl benzoate. Furthermore, its specific reaction mechanism was discussed based on the distribution of products in the lignin dimer oxidation process, which was useful for understanding the further oxidative depolymerization of lignin.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Tingting Zhou,Hailin Zhang,Junyou Shi
Lignin, as the largest renewable aromatic resource, has significant opportunities for producing high-value products via catalytic depolymerization. However, its complex structure and stable chemical bonds present challenges to its transformation. This study explores the catalytic depolymerization of lignin to aromatic monomers by means of Dawson-type phosphomolybdovanadate polyoxometalates (POMs), understanding the underlying mechanisms. Furthermore, vanadium modification is employed to adjust the catalyst's oxidative and acidic properties, demonstrating that the vanadium content in Dawson-type POMs greatly influences monomer yield. The highest yield is achieved with H 8 P 2 Mo 16 V 2 O 62 (V2). Optimal conditions include a reaction temperature of 150 °C, 4 h, an oxygen pressure of 1 MPa, a methanol-to-water ratio of 8:2, and a mass ratio of the catalyst to the wood powder being 1:1, which leads to a total yield of aromatic monomers at 24 %. POMs with high REDOX potential selectively oxidizes benzyl hydroxyl groups in lignin to benzyl carbonyl groups under the combined action of acidity and oxidation of polyacids. This weakens the β O 4 bond and promotes C O bond cleavage. This approach, utilizing the tunable oxidative acidity of polyoxometalates to degrade lignin and produce various aromatic monomers, shows promising potential for lignin valorization and advancing a bio-economy based on lignocellulosic resources.
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PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1699
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IF 4.2
Yue Liu,Long Cao,Linshan Wang,Yanjiao Qi,Yamin Zhao,Huining Lu,Lina Lu,Derong Zhang,Zifan Wang,Hong Zhang
The massive amount of water-soluble urea used leads to nutrient loss and environmental pollution in both water and soil. The aim of this study was to develop a novel lignin-based slow-release envelope material that has essential nitrogen and sulfur elements for plants. After the amination reaction with a hydrolysate of yak hair keratin, the coating formulation was obtained by adding different loadings (2, 5, 8, 14 wt%) of aminated lignin (AL) to 5% polyvinyl alcohol (PVA) solution. These formulations were cast into films and characterized for their structure, thermal stability, and mechanical and physicochemical properties. The results showed that the PVA-AL (8%) formulation had good physical and chemical properties in terms of water absorption and mechanical properties, and it showed good degradation in soil with 51% weight loss after 45 days. It is suitable for use as a coating material for fertilizers. Through high-pressure spraying technology, enveloped urea particles with a PVA-AL (8%) solution were obtained, which showed good morphology and slow-release performance. Compared with urea, the highest urea release was only 96.4% after 30 days, conforming to Higuchi model, Ritger–Peppas model, and second-order dynamic model. The continuous nitrogen supply of PVA-AL coated urea toBrassica napuswas verified by potting experiments. Therefore, the lignin-based composite can be used as a coating material to produce a new slow-release nitrogen fertilizer for sustainable crop production.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Chang-An Xu,Xingchi Li,Zhengbang Tong,Zhuangzhuang Chu,Heng Fang,Yang Hu,Xudong Chen,Zhuohong Yang
Although the coating can effectively prevent metal corrosion, it is easy to form micro-pores and micro-cracks during the curing process, and the coating is inevitably damaged by the external environment during use, resulting in a reduction in its protective ability, thereby shortening the service life of the substrate. Inspired by the stress closure function of mimosa, an intelligent anti-corrosion coating with stress closure function against corrosion products (Fe 2+ ) was prepared by using pyridine derivatives and lignin grafted graphene oxide (ATGO). By density functional theory calculation, the binding energy of pyridine group and Fe 2+ was −369.99 kcal/mol, and their strong complexation would facilitate the formation of a dense protective layer at the metal corrosion interface. The test results showed that ATGO-CM coating had high fracture strength (86.9 MPa) and adhesion strength (2.03 MPa), as well as low water vapor permeability (1.3 × 10 -6 g m −1 day −1 Pa −1 ). Electrochemical testing denoted that after soaking in 3.5 wt% saline solution for 100 days, the impedance modulus of the ATGO-CM coating remained at 5.36 × 10 9 Ω·cm 2 at low frequencies (f = 0.01 Hz), which was two orders of magnitude higher than the blank group. Through scratch experiments showed that the complexation effect of pyridine groups and corrosive products could significantly improve the corrosion resistance of the coating, with R ct value of 1.8 × 10 4 Ω cm 2 for the damaged coating, one order of magnitude higher than the blank group. This work not only provided a reference for the preparation of intelligent anti-corrosion coatings with bionic functions, but also increased the added value of biomass materials.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xinkang Sha,Langqian Chen,Ying Jia,Hanyu Zhao,Shuai Zuo,Pengfei Yuan,Guangxue Chen
Functional superhydrophobic cotton fabrics find extensive applications in both textile and non-textile domains. Nonetheless, fabric treatment typically relies on fluorine-containing compounds, inorganic nanoparticles and potentially hazardous organic solvents, posing environmental risks during fabrication and disposal. To address this issue, endeavours are underway to develop environmentally sustainable and cost-effective methods and materials for imparting superhydrophobic properties to cotton fabric surfaces. Here, we prepared lignin nanoparticles (LNP) utilising deep eutectic solvents and facilitated their surface adhesion to cotton fabrics through the self-polymerisation of tannic acid (TA) under alkaline conditions for the construction of micro-/nanostructures on the fabric surface. Subsequently, methyltrimethoxysilane (MTMS) was employed to confer superhydrophobic properties to the fabrics using a combination of thermal chemical vapour deposition techniques, resulting in a contact angle of approximately 164.3° and a sliding angle of 8.52°. Owing to the combined effect of TA and LNP, the modified fabrics exhibited excellent ultraviolet (UV) shielding ability (UV transmittance < 1 %, UV protection factor = 50 + ) and photothermal conversion (54.2 °C in 150 s). In short, micro-/nanostructures with surface hydrophilicity were constructed on the surface of cotton fabrics using two hydrophilic biomaterials, i.e. TA, which is similar to polydopamine but lighter in colour and less expensive, and LNP as sustainable colloidal particles. Subsequently, their surface roughness was further enhanced, and superhydrophobic properties were imparted through modification with the low surface energy substance MTMS. This method not only promotes the high-value utilisation of lignin but also serves as a reference for constructing superhydrophobic structures using biomass hydrophilic materials on cellulose substrates. The prepared superhydrophobic fabric suggests potential applications in water and stain repellence, self-cleaning, outdoor UV protection and the management of marine oil spill pollution.
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ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Yutong He,Shaochao Sun,Xinxu Zhang,Ying Xu,Chen Zhang,Changyou Shao,Jun Yang,Jialong Wen
Hydrogel holds great promise as a strain sensor for flexible electronics. However, traditional hydrogel polymerization processes are hindered by extensive time and energy demands. Additionally, the inadequate adhesion of hydrogel sensors to human skin in extreme conditions often results in signal instability and inaccuracy. To address these challenges, herein, a novel lignin-assisted self-catalytic system (lignin-Fe3+) has been developed to rapidly fabricate self-adhesive and antifreezing multifunctional zwitterionic hydrogels (L-Fe@HE-AA/DMAPS hydrogels) in a water (H2O)–ethylene glycol (EG) solution. The incorporation of EG and zwitterionic [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (DMAPS) endows the hydrogels with remarkable anti-freezing property over a wide temperature range from −60 to 60 °C, enhanced non-drying properties (73.7% retention), excellent self-adhesion (110.0 ± 3.1 kPa on paper), and excellent mechanical properties (236.15 kPa fracture stress, 556.8% fracture elongation). Leveraging the comprehensive integration of these properties, the zwitterionic hydrogels were assembled as strain sensors, exhibiting high sensitivity (Gauge factor = 6.044), fast response (198 ms), and impressive signal stability. The design of L-Fe@HE-AA/DMAPS hydrogels via a lignin-Fe3+ self-catalytic system and zwitterionic DMAPS presents a promising strategy for practical applications in skin strain sensors.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Qin Chen,Yin Zhao,Zhaolin Yang,Rao Guo,Siqi Huan,Baobin Wang,Guihua Yang
Lignin, a byproduct of the paper and pulp industry, shows promise as stabilizers for emulsions, offering potential value-added applications to direct disposal. However, utilizing particulate lignin directly as stabilizers is challenging due to limited emulsion stability. In this study, co-stabilization of Pickering emulsions is investigated by combination of lignin particles and cationic surfactants (CTAB and DDAB), wherein lignin source and oil types are optimized with a focus on emulsion stability. A battery of characterization methods, including visual appearance, microstructure, droplet size, zeta potential, etc., is employed to evaluate emulsion stability. The findings reveal that kraft lignin nanospheres (LNS) are the optimal stabilizing particles. The incorporation of cationic surfactants via electrostatic adsorption enhances the stabilizing effect of LNS, and the use of DDAB is found to significantly enhance emulsion stability compared to CTAB, attributing to higher charge shielding capability of DDAB, as well as the formation of a more robust and compact nonpolar anchoring layer. The surfactant-assisted LNS can be used to stabilize a range of oil types, with tridecane as the optimal oil. This research presents a straightforward, efficient, and scalable approach for producing highly stable lignin-based Pickering emulsions, showing potential applications in recycling and value enhancement of waste lignin.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yi Liu,Shaoyan Wang,Jiarui Liang,Lirong Lu,Yi Xie,Chengrong Qin,Chen Liang,Caoxing Huang,Shuangquan Yao
Demethylation modification of lignin is an effective strategy to overcome the barrier to its high-value conversion. The purpose of this study focuses on the new proton-based ionic liquid (PIL) 1, 2-propanediamine/glycolic acid (PD/GA) as a catalyst and solvent to achieve the targeted oxidation of lignin. The PD/GA solvents have higher selectivity and efficiency. Optimal phenolic hydroxyl (PH)-increment was achieved, demonstrating enhanced demethylating effect on lignin by modulating the acid-base molar ratio, reaction temperature, and reaction time. Compared to ethanolamine/acetic acid (CE/AC) treatment, the PD/GA treatment at molar ratio 1.25, temperature 60 °C, and 3 h increased the PH-content from 37.74 to 59.91 %. Additionally, the lignin treated with PD/GA exhibited excellent recyclability, featuring a larger Brunauer-Emmett-Teller surface area (1.45 m 2 .g −1 ), total pore volume (9.51*10 −3 cm 3 .g −1 ), and mesoporous size (26.15 nm). The treated lignin yielded maximum ultraviolet resistance and antioxidant activity. These results present new avenues for the development of green and efficient lignin demethylation methods.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Tao Gui,Ling-Ping Xiao,Shuang-Lin Zou,Yue Zhang,Xu Fu,Chang-Hao Liu,Run-Cang Sun
Catechyl lignin (C-lignin) is a unique natural biopolymer that is considered to be the best alternative to conventional lignin due to its linear homogeneous molecular structure. Based on the structural properties of C-lignin, the development of a new biodegradable plastic to replace traditional petroleum-based plastics is a sustainable route. However, the maximum filling fraction of lignin is required to achieve excellent biodegradability of lignin-based bio-plastics, yet resulting in decreased mechanical strength of composites. Herein, we report a novel strategy to fabricate a closed-loopling recyclability supramolecular composite films through casting and dry molding process of intermolecular covalent-noncovalent cross-linking networks with polyvinyl alcohol by the epoxidation of C-lignin. The intermolecular cross-linking mechanism analyses reveal that the resultant bio-material not only display improved mechanical properties (maximum tensile strength of 133.5 MPa and strain at break of 690.2 %), but also show UV-resistant, antimicrobial, thermally stable, and rapid biodegradable properties. Notably, the fabricated films demonstrate the characteristics of closed-loop recyclability, which paves a new way toward rational design of bioplastics using renewable lignin. These integrated properties make the lignin-based biocomposites a promising alternative to traditional plastics.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 32
·e55752
·
IF 2.7
Yihao Zhang,Yingnan Sun,Haiming Li,Haiqiang Shi,Meihong Niu,Xing Wang,Tingting Chu,Zhiwei Wang,Yanzhu Guo
In this work, two types of cationic lignin-based adsorbents (AL-METAC and AL-GTA) were prepared through free radical polymerization or etherification reaction of alkali lignin with 2,3-epoxypropyl-3-trimethylammonium chloride or methylacrylloxyethyl trimethyl ammonium chloride (METAC). The contents of quaternary ammonium groups in the adsorbents were adjusted by changing the dosages of 2,3-epoxypropyl-3-trimethylammonium chloride and METAC to fabricate the adsorbents with excellent adsorption capacity. The structures, aqueous solubility, and physical properties of adsorbents were analyzed. Meanwhile, the effects of adsorbents dosage, pH value of solution, temperature, and ionic strength on the adsorption capacity of adsorbents were also analyzed. These two types of adsorbents exhibited outstanding affinity for phosphate, with a maximum removal efficiency of 51.8 and 73.2 mg/g, respectively. The adsorption processes followed pseudo-second-order and Langmuir models well. In addition, the AL-GTA exhibited higher removal efficiency than AL-METAC. Moreover, the AL-METAC and AL-GTA still retained 69.7% and 69.0% adsorption capacity after four times regeneration. The fabricated lignin-based adsorbents have potential applications in the removal of phosphate from wastewater, which would promote the high-value application of lignin.
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高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Rong Du,Jin Zhang,Dinghao Sun,Tong Lin,Yanzhou Wang,Lv Yin,Yuanpeng Wu
The MoS 2 /lignin hybrid material was successfully synthesized and incorporated into an epoxy resin to fabricate composite coatings. The results demonstrate that MoS 2 is uniformly attached to the surface of lignin sheets. Compared to adding lignin alone, the MoS 2 /lignin hybrid-epoxy resin (EP) composite coatings exhibited enhanced friction-reducing and wear-resistant properties. Specifically, the 1 wt% MoS 2 /lignin hybrid displayed excellent dispersion and high interfacial compatibility within the resin matrix, leading to a 66.7% increase in Vickers hardness, a 27.5% increase in tensile strength, and a 73.9% improvement in char yield. Furthermore, the friction coefficient and wear rate were reduced by 63.2% and 75.8%, respectively. As a uniformly dispersed hybrid structure, the MoS 2 /lignin material can endure higher loads, autonomously repair defects, and form a stable and complete transfer film on the worn surface, demonstrating synergistic friction-reducing and wear-resistant effects within the epoxy resin matrix. Integrating MoS 2 into a two-dimensional material can provide a practical reference for designing polymer-based hybrid materials with outstanding comprehensive properties. Highlights The MoS 2 /lignin hybrid material was successfully synthesized. MoS 2 is uniformly attached to the surface of lignin sheets. The hybrid significantly enhances friction-reducing and wear-resistant properties. Vickers hardness increased by 66.7%, and tensile strength increased by 27.5%. The friction coefficient was reduced by 63.2%, and the wear rate was reduced by 75.8%.
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危险品化学品经营许可证（带存储）