INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Dan Li,Liheng Chen,Xueqing Qiu
Antibiotic resistance and the rise of untreatable bacterial infections pose severe threats to human health. Silver nanoparticles (AgNPs) have emerged as a promising antibacterial solution due to their broad-spectrum effectiveness. However, their relatively high cytotoxicity has limited their widespread application. In this study, ferulic acid (FA) was used as a reducing agent, while silver oxide served as a silver precursor to rapidly prepare FA-derived lignin (FAL) coated AgNPs (AgNPs@FAL) with a size ranging from 34.8 to 77.1 nm. Density functional theory (DFT) calculations indicated that the coating of FAL endowed AgNPs@FAL with high stability, preventing the oxidation of AgNPs prior to antibacterial applications. Cell experiments further indicated that AgNPs@FAL exhibited lower cell toxicity (∼80 % viability of normal kidney cells cultured at 25 μg/mL AgNPs@FAL) compared to fully exposed commercially available citrate-modified AgNPs (AgNPs@CA). Antibacterial experiments revealed that the minimum inhibitory concentrations (MIC) of AgNPs@FAL against E. coli and S. aureus were 12.5 μg/mL and 25 μg/mL, respectively, surpassing the antibacterial effect of AgNPs@CA, as well as ampicillin and penicillin. Additionally, AgNPs@FAL was capable of disrupting E. coli and S. aureus biofilm formation. This novel AgNPs@FAL formulation presents a promising antibacterial solution, addressing limitations observed in conventional drugs.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jintao Zhang,Jin Sun,Xiaohong Zhou,Rongxian Ou,Lichao Sun,Chuigen Guo,Qi Fan,Zhenzhong Gao
Isocyanate-free polyurethane adhesives have attracted considerable attention as a promising environmentally friendly alternative. However, their progress has been hindered by insufficient bonding performance and weak solvent resistance, as well as the laborious synthesis processes involved. Herein, we successfully synthesized a high-performance lignin-based non-isocyanate adhesives (LNIPUs-G) through a one-pot strategy that combines the polycondensation of carbonate groups with polyether amines and aldehyde-amine chemistry. The former aspect circumvents the limitations associated with cyclic carbonate polyaddition while providing a molecular composition containing both rigid and flexible segments along with a high-density polar groups. Concurrently, the rapid hyperbranching process in the latter aspect significantly contributes to achieving a robust crosslinked network. As a result, the LNIPUs-G demonstrates exceptional resistance to boiling water with bond strengths of up to 1.32 MPa when applied to plywood, surpassing previously reported bio-based adhesives. Moreover, the adhesive exhibits remarkable versatility across a wide range of substrates including steel, iron, copper, carbon fiber reinforced composites, ceramics, aluminum, wood, and glass. Additionally, the adhesive has excellent resistance to an extensive range of organic solvents. Life cycle assessment (LCA) results demonstrate that the high-performance and cost-effective LNIPUs-G is expected to disrupt the dominance of bulk formaldehyde- and isocyanate-based adhesives industry.
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GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2783-2792
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IF 9.3
Jiayi Zheng,Liheng Chen,Zhichang Huang,Xueqing Qiu
Extraction of native-like lignin from lignocellulose is crucial for maximizing the value of all three major components of biomass. In this study, molecular dynamics was employed to reveal the essence of lignin condensation during the pretreatment of biomass with a promising acidic hydrotropic solution (AHS) at the molecular level. Diols were discovered to effectively suppress the excessive acidity of p-toluenesulfonic acid (pTsOH) in AHS while maintaining its solubilizing effect below a minimal hydrotropic concentration (MHC). The experimental results confirmed that the combined use of 1,4-butanediol and pTsOH can extract native-like lignin under mild conditions. The retention of lignin's β-O-4 linkages can exceed 90%, and the lignin extraction rate was over 80%. The obtained lignin can enhance the efficacy of chemical sunscreens, doubling the sun protection factor (SPF). Simultaneously, the residual cellulose was readily hydrolyzed into glucose by cellulase. This strategy demonstrates excellent adaptability to various biomass sources, including herbaceous species, hardwoods, and highly recalcitrant softwoods. The work lays the theoretical foundation for the precise control of biomass component separation using AHS, contributing to the development of mild and efficient component separation technologies in the future.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jinzhu Chen,Yuliang Li
The slow-kinetics of hydrogen evolution reaction (HER) and high energy barrier of oxygen evolution reaction (OER) lead to significant overpotentials, limiting the application of water electrolysis. In this study, a transition metal compound and alloy catalyst encapsulated in lignin-derived carbon (Mo 2 C/Ni 2 Mo 3 N/MoNi 4 @SLAC, abbreviated as MoNi@SLAC) was designed and synthesized. The composition and structural characteristics of the catalyst were confirmed through various characterization techniques, including XRD, XPS, SEM and TEM. In alkaline electrolyte, when current density achieves 10 mA cm −2 , the catalyst exhibited the HER and OER overpotentials are 185 and 283 mV, respectively. Stability tests demonstrated its excellent durability. The synergistic effect among the compounds significantly reduced the overpotentials during the electrocatalytic process, while the protective role of the carbon substrate effectively enhanced the prolonged determinacy of material. This work provides a new tactics and theoretical foundation for the devisal and stability optimization of efficient bifunctional electrocatalysts.
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Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 2
·1-14
·
IF 23.2
Li Wei,Li Tiantian,Deng Boyan,Xu Ting,Wang Guanhua,Hu Weicheng,Si Chuanling
Desalination with solar-driven photothermal evaporator is extremely attractive for tackling the current freshwater shortage of humanity, and a scalable and efficient interfacial solar evaporator is thus highly desirable. In this work, a facile low-cost Janus evaporator with excellent evaporation performance and energy conversion performance was fabricated from potassium hydroxide (KOH)–activated lignin-based carbon (KLC) and commercial melamine foam (MF). The KLC with rich and multiple microscale/nanoscale pores presented high light absorption (90%) and excellent photothermal conversion capacity (up to 60.4 °C) in the full solar spectrum (200–2500 nm). Subsequently, the KLC was simply coated on the upper surface of MF to obtain the self-floating Janus KLC/MF evaporator. The hydrophilic nature and the porous structure of MF ensured sufficient water supply to the evaporation interface and facilitated effective diffusion of water vapor. The solar steam generation test revealed that the water evaporation rate of the Janus KLC/MF under simulated sunlight was 1.539 kg m −2 h −1 , with a superior photothermal conversion efficiency of 95.88%, which is higher than previously reported melamine-framed evaporators. Moreover, the evaporator has an excellent recycling ability and shows a stable water evaporation rate, indicating preferable durability in practical desalination. Overall, this work demonstrates the great potential of using low-cost lignin as a feedstock for the preparation of solar-driven interfacial evaporation systems integrating multiple functionalities for clean water production and thus offers a viable strategy for the application of lignin-based functional materials.
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Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·1-16
·
IF 21.8
Wang Enfu,Wang Siqun,Li Wenzhu,Zhang Wenbiao,Dai Chunping,Sheng Kuichuan,Huang Jingda
Developing effective raindrop monitors for complex outdoor environments remains a significant challenge. Herein, an innovative raindrop monitoring mechanism based on synergistic charge and proton transfer was proposed to overcome the limitations of traditional deformation-based raindrop monitors, whose accuracy is compromised by interference from wind and insect micro-vibrations. A span-new conductive and superhydrophobic coating was designed through integrating lignin nanospheres, in situ grown ZnO, in situ polymerized polypyrrole (PPY), and polydimethylsiloxane, transforming natural wood into a raindrop monitor via simple spraying. When raindrops contact the raindrop monitor, the charges and protons in the water vapor penetrate the coating to interact with the surface holes of PPY, thereby causing measurable changes in resistance. The coating exhibits excellent superhydrophobicity (water contact angle of 165.8°) and conductivity (0.52 S/m), precisely responding to raindrops with various volumes, heights, and pH values (response time of 282 ms). Furthermore, the coating demonstrates outstanding environmental stability, including remarkable abrasion resistance (maintaining superhydrophobicity after 30 abrasion cycles), outstanding ultraviolet (UV) resistance (retaining superhydrophobicity for 250 h and 13 h under 15 W/m 2 and 1000 W/m 2 UV irradiation respectively), and high antibacterial property (99.9% against both Escherichia coli and Staphylococcus aureus ), ensuring its long-term stable operation in complex outdoor environments. Given the simple preparation and superior performance, this work provides a foreseeable prosperity for the long-term application of raindrop monitor in complex outdoor environments to promote ecological research.
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Toxics
·
2025
·Vol. 13
·期 9
·759
·
IF 4.1
Haixin Wang,Tao Shen,Yiming Wang,Zongxiang Lv,Yu Liu,Juan Wu,Tai Li,Shui Wang,Yanguo Shang
This study developed a novel adsorbent for Cr (VI) removal from wastewater by grafting N-[(dimethylamino)methylene]thiourea (TUFA) onto lignin. The resulting TUFA-functionalized lignin adsorbent AL was comprehensively characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), and X-ray photoelectron spectroscopy (XPS). Batch adsorption experiments systematically evaluated the influence of solution pH, contact time, temperature, initial Cr (VI) concentration, and adsorbent dosage. AL exhibited high adsorption capacity (593.9 mg g−1at 40 °C), attributed to its abundant nitrogen and sulfur-containing functional groups. Kinetic analysis revealed that the adsorption process followed pseudo-second-order kinetics. Equilibrium isotherm data were best described by the Langmuir model, indicating predominant monolayer chemisorption. Thermodynamic parameters demonstrated that Cr (VI) adsorption onto AL is spontaneous, endothermic, and entropy-driven. The adsorption mechanism involves membrane diffusion and intra-particle diffusion processes. This work successfully synthesized a stable, effective, and low-cost adsorbent (AL) using an amine agent incorporating both nitrogen and sulfur functional groups, offering a promising approach for treating Cr (VI)-contaminated wastewater.
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JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Zilu Zhang,Chenguang Zhang,Boyang Sun,Xiaofei Xu,Xiaobo Chen,Zhihe Li,Shaoqing Wang
Lignin and heavy oil (HO) possess complementary properties, thus rendering their synergistic co-pyrolysis a promising strategy to overcome the limitations of their individual pyrolysis processes. This study is designed to advance biomass valorization, facilitate the clean utilization of heavy oil, and enable the production of high-quality fuels. In this study, the co-pyrolysis behavior of lignin and HO was investigated using an integrated TG-FTIR-MS system combined with fixed-bed pyrolysis experiments, with a focus on the kinetic characteristics and synergistic effects at different HO blending ratios (10 %, 30 %, and 50 %). The results revealed a significant overlap in the primary pyrolysis temperature ranges of lignin (152.43°C-598.77 °C) and HO (68.68°C-402.34 °C). Kinetic analysis based on the FWO and DAEM methods demonstrated that the average activation energy during co-pyrolysis decreased progressively below the theoretically calculated values with increasing HO content. Fourier transform infrared analysis indicated enhanced C–H absorption peak intensities and reduced C–O peaks. A notable synergistic effect was observed at the C–H absorption peak when the HO blending ratio reached 50 %, which confirmed the feasibility of co-pyrolysis. Fixed-bed pyrolysis experiments further confirmed that co-pyrolysis increased the yields of phenolic and aromatic compounds, thereby improving the overall quality of the pyrolysis oil. This study provides fundamental data to support the development of innovative co-conversion pathways for lignin and petroleum-based HO.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jia-Qi Wu,Qing He,Zhuang-Zhuang Li,Si-Wen Li,Wei Wang,Jian-She Zhao
Lignin, a major component in renewable plant biomass, serves as a potential source of high-value aromatic chemicals. However, efficiently decomposing lignin while maintaining its aromaticity for fossil fuel substitution remains a significant challenge. This study synthesized a [VimAm]Br@POM@AC catalyst, composed of a Keggin-type polyoxometalate (POM) modified by ionic liquid ([VimAm]Br) and supported on activated carbon (AC). The response-surface methodology was applied to explore the catalytic performance of this catalyst in the oxidative depolymerization of lignin β-O-4 model compounds. Under the reaction conditions of 160 °C, 3 mL H 2 O 2 , and 0.4 g catalyst within 8 h, the conversion rate of lignin model compounds reached 83.01 %. The reaction generated diverse aromatic products, with the selectivity of methyl mandelate and methyl benzoate reaching 27.70 % and 59.02 %, respectively. Mechanistic studies revealed that the [VimAm]Br@POM@AC catalyst selectively cleaves C O bonds in β-O-4 dimers, facilitating the formation of aromatic compounds. Moreover, FT-IR spectroscopy and SEM analysis confirmed the good stability of the recovered catalyst. This work achieves efficient directional conversion of lignin model compounds through the design of a multilevel-structured catalyst, precise optimization of reaction conditions, and innovative mechanistic interpretation. It offers a novel strategy with both academic significance and application potential for the high-value utilization of biomass resources.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qianqian Yu,Xiaohan Sun,Zejun Pan,Meiying Wu,Zhihui Dong,Yunyun Xia,Wan Nong,Xin Li,Zhaolin Yang,Yudong Li,Chengyu Wang
With the exhaustion of fossil fuels, prior phase change materials are characterized by such drawbacks as poor thermal conductivity, weak shape stability, and high costs. Therefore, the preparation of phase change materials with brilliant thermal-insulating properties, high thermal conductivity, and leakage-free properties has emerged as a crucial research focus. Herein, a sericultural mulberry branch-derived (SMB) composite phase change material was prepared by deep eutectic solvent pretreated SMB and vacuum-assisted impregnated paraffin wax with cupric oxide (CuO). The anisotropic porous SMB features a whole trunk structure similar to pith, xylem, and bark, which is closely tied physiological functions and provides a foundation for thermal storage and release. Triple layer porous structure of SMB as supporting material determined the excellent shape stability of composite phase change material. The addition of CuO significantly enhances the thermal conduction capacity. After 50 cycles heating, CuO/PW/DSMB retained 98 % of latent heat capacity and enthalpy change for heat absorption was measured at 91.66 J/g, which represents a decrease of 17.94 J/g, demonstrating a significant superior latent thermal effect and excellent thermal stability. Moreover, the triple layer of SMB uneven thermal transfer generate a self-regulating thermal management functional structure to achieve mutual thermal compensation. In summary, this composite phase change material, with its excellent properties of thermal insulation, high thermal conductivity, leakage-free nature, low cost, and easy availability, has broad application prospects in thermal energy storage and energy conservation.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 10
·1-15
·
IF 2.8
Li Hui,Li Yangyang,Yan Haotan,Liao Xunhua,Wang Ning,Xue Zijian,Wang Shiyu,Li Wen,Chen Zhenbin,Liu Hong
This work prepared a lignin-based double-layer slow-release fertilizer (SRF). We prepared sodium alginate-zinc ammonium phosphate microbeads as the inner core of fertilizer by ion exchange method, cellulose acetate butyrate (CAB) co-blended with degradable material polylactic acid (PLA) as the inner coating, and two chemically modified lignin (sulfonated lignin and epoxy-aminated lignin) as the second coating. The synthesized Materials were characterized morphologically and structurally by FTIR, TG, XRD and SEM. The viscosity, mechanical property, water contact angle, water-holding property, water-retention and slow-release property of the samples were evaluated. PC-SRF, PSC-SRF and PEC-SRF all had superior water-retention and nutrient release property compared to sodium alginate-zinc ammonium phosphate. The release of urea and phosphorus in the single-layer PC-SRF reached equilibrium after 34 and 36 days, and their cumulative release rates reached 87.09% and 86.19%, respectively. The release of urea and phosphorus from the bilayer PSC-SRF reached equilibrium after 38 and 40 days, and the cumulative release rates reached 83.57% and 82.07%, respectively; the release of urea and phosphorus from the bilayer PEC-SRF prepared under the same conditions reached equilibrium after 38 and 42 days, and the cumulative release rates reached 81.47% and 81.66%, respectively. Graphical abstract
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Materials Today Chemistry
·
2025
·
IF 6.7
Lanrui Yin,Fei Zhou,Keling Yan,Yashi Pu,Guanghui Li,Di Tian
The weak interaction between transition metal selenides and carbon materials caused difficulties for their combination. In this study, a novel strategy based on lignin and Co nanoparticles was used for modifying electrospun carbon nanofibers to boost the growth of Ni 3 Se 4 . Interestingly, various types of lignin could induce the aggregation and distribution of Co nanoparticles, leading to different crystal structures, morphologies, and amounts of Ni-based selenides. Among them, sodium lignosulphonate brought about Co nanoparticles inside nanofibers and the formation of S–Co bonds, leading to the massive growth of Ni 3 Se 4 nanosheets with high redox activities and abundant active sites. As a result, the sample modified by Co and sodium lignosulphonate (CFLS@NiSe) with a diffusion-controlled hybrid capacity displayed the highest value of 384.00 C g −1 (853.33 F g −1 ) at 0.5 A g −1 and acceptable rate performance (capacity retention of 39 %, from 0.5 to 10 A g −1 ), which exceeded many reported transition metal selenide-carbon composites. Furthermore, a hybrid solid-state supercapacitor (CFLS@NiSe//bamboo derived active carbon) with a high energy density of 61.33 Wh kg −1 was assembled, which could supply energy for light emitting diode and deliver a capacity retention of 94.15 % as well as Coulombic efficiency of 92.29 % after 10,000 cycles. Compared with traditional modification strategies, this work proposed a novel, facile, feasible, low cost and environmentally friendly method to modify carbon nanofibers to regulate the growth of selenides, which will offer ideas for the design of composite materials.
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危险品化学品经营许可证（带存储）