JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Da-xia Zhang,Guang Liu,Tong-fang Jing,Jian Luo,Guang Wei,Wei Mu,Feng Liu
It is highly desirable to fabricate a pesticide delivery system with excellent permeability to reduce the damage caused by root-knot nematodes in the soil. In this work, a novel electronegative pesticide nanocarrier was established by bonding anionic lignosulfonate with epoxy resin nanocarriers, which were loaded with abamectin (Aba). The results demonstrated that nanoparticles were negatively charged (−38.4 mV) spheres with an average size of 150 nm, and the encapsulation efficiency of nanocarriers for Aba was 93.4%. Polymer nanocarriers could prevent premature release of Aba and protect active ingredients from microbiological degradation. The adsorption strength of the soil to Aba loaded in nanocarriers was reduced by 6 to 10 times, so nanonematicides have remarkable soil mobility. Meanwhile, nanoparticles could easily penetrate the roots and nematodes. The application test confirmed that the control effect of this nanopesticide was 26–40% higher than that of the other agrochemicals. In consideration of its superior bioactivity and utilization rate, this pesticide delivery system has promising potential to control root-knot nematodes and improve the pesticide’s utilization efficiency.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Yueping Jiang,Yanhong Feng,Bo Lei,Huiting Zhong
A compounded medium of supercritical CO 2 , ethanol, and water (SEW) was used to extract lignin from eucalyptus fiber and the mechanism of the extraction was studied. Compared with the extraction method based on high-temperature ethanol (HTE), the lignin yield of the SEW method was 49.7% higher with higher average molecular weight. Physical and chemical synergies occurred during the extraction process. SEW compound medium penetrated eucalyptus fiber cell walls because of strong permeability, while the fast discharge of the compounded medium facilitated efficient lignin dissociation and removal. Carbonic acid formed from CO 2 and water under high temperature and pressure can provide an acidic environment to effectively degrade hemicellulose . Formaldehyde formed from CO 2 and ethanol in the process also prevented condensation of the extracted lignin fragments. The obtained lignin had high content of β-O-4 linkages and syringyl units.
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Yu Xin,Lin Dong,Yong Guo,Xiaohui Liu,Yongfeng Hu,Yanqin Wang
Production of aromatic hydrocarbons through lignin hydrodeoxygenation (HDO) is of significant importance. Previously, we found that Ru/Nb 2 O 5 was an excellent catalyst for the conversion of lignin to arenes with relatively high selectivity (71%). Herein, we aim to clarify which properties of Nb 2 O 5 influence the activity and selectivity. Four Ru/Nb 2 O 5 catalysts with different Nb 2 O 5 morphologies were used in the HDO of 4-methylphenol. Intensive studies show that layered Nb 2 O 5 supported Ru has more Nb O groups (unsaturated NbOx sites) and highest Ru dispersion, which led to the highest activity and toluene selectivity, this was further confirmed by loading pre-synthesized Ru colloids in various Nb 2 O 5 . Finally, a Ru/Nb 2 O 5 catalyst with more unsaturated Nb O groups was designed and it was found that even with enzymatic lignin as the feedstock, the selectivity to arenes can reach up to 94.8% with the yield of hydrocarbons of 99.6%. This study provides a promising strategy for catalyst design towards the selective production of aromatic hydrocarbons from lignin.
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高影响因子
POLYMER TESTING
·
2020
·
IF 3.275
Boyu Du,Changzhou Chen,Yang Sun,Mengtian Yu,Bingyang Liu,Xing Wang,Jinghui Zhou
We reported a new approach for development of lignin bio-oil-based electrospun nanofibers (LENFs) that had high substitution ratio (up to 80 wt%) and good morphology. This approach was particularly unique and translatable as it used small molecule lignin bio-oil with high reactivity and low heterogeneity obtained via lignin depolymerization reaction to produce well-oriented LENFs. Firstly, effects of various blends solutions ratios and electrospinning parameters on the characteristics of the obtained LENFs were analyzed. The results showed that the optimal parameters that resulted in the best electrospun nanofibers were as follows: blend solution ratio, the 20 wt% blend solution containing 80 wt% straw lignin bio-oil (SLB) and 20 wt% polyacrylonitrile (PAN), flow rate , 1 mL/h, voltage, 20 kV, rotational speed, 500 r/min and the distance between needle and collection screen, 20 cm. Secondly, used the best LENFs, we also applied to prepare lignin bio-oil-based carbon nanofibers (LCNFs) and estimated its properties by scanning electron microscope (SEM), X-ray diffraction (XRD) patterns, Raman spectroscopy and tension testing. Our results demonstrated that compared with pure PAN carbon nanofibers (PCNFs), the as-prepared LCNFs had similar smooth surfaces, similar crystallinity and similar mechanical properties. This work can promote the utilization of lignin depolymerization main-products to produce lignin-based materials, while also help to reduce use of high-cost PAN.
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DOI
高影响因子
Applications in Energy and Combustion Science
·
2021
·
IF 0
Huiyan Zhang,Bingbing Luo,Kai Wu,Han Wu,Jiajun Yu,Siyu Wang
Catalytic fast pyrolysis of lignin is easy to cause agglomeration and coking, resulting in low-yield aromatic hydrocarbons. Catalytic pyrolysis of modified lignin combined with metal-modified HZSM-5 was proposed to enhance the aromatic yield. The experiment results showed that chemical modification with Ca(OH) 2 not only inhibited the agglomeration behavior of lignin but also increased the yield of light phenolic compounds. Moreover, Ca 2+ -loaded lignin combined with metal-modified HZSM-5 was conducive to the formation of aromatics. The total yield of aromatics from the catalytic fast pyrolysis of Ca 2+ -loaded lignin over Zn/HZSM-5 was improved from 31.1 to 46.1 mg/g. The mechanism insight showed that Ca 2+ modification realized the chemical combination between Ca 2+ and the functional groups which are responsible for the agglomeration of lignin, and then the introduction of the Zn species suppressed the hydrogen transfer reaction and enhanced the dehydrogenation pathway, resulting in the increase of aromatic yield.
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DOI
ChemSusChem
·
2020
·Vol. 13
·期 17
·4409-4419
·
IF 7.962
Xinxin Li,Bo Zhang,Xiaoli Pan,Jianwei Ji,Yujing Ren,Hua Wang,Na Ji,Qiying Liu,Changzhi Li
Graphical Oh! Sweet naphthene : Ir-ReO x /SiO 2 is employed for the one-pot conversion of lignin feedstocks and typical lignin model compounds into naphthenes. The excellent activity of Ir-ReO x /SiO 2 is attributed to the synergistic effect between Ir and ReO x species based on characterization of the catalysts and control experiments. The direct transformation of lignin into fuels and chemicals remains a huge challenge because of the recalcitrant and complicated structure of lignin. In this study, rhenium oxide-modified iridium supported on SiO 2 (Ir-ReO x /SiO 2 ) is employed for the one-pot conversion of various lignin model compounds and lignin feedstocks into naphthenes. Up to 100 % yield of cyclohexane from model compounds and 44.3 % yield of naphthenes from lignin feedstocks are achieved. 2 D HSQC NMR spectroscopy before and after the reaction confirms the activity of Ir-ReO x /SiO 2 in the cleavage of the C−O bonds and hydrodeoxygenation of the depolymerized products. H 2 temperature-programmed reduction, temperature-programmed desorption of NH 3 , IR spectroscopy of pyridine adsorption, X-ray photoelectron spectroscopy, X-ray absorption fine structure analysis, and control experiments reveal that a synergistic effect between Ir and ReO x in Ir-ReO x /SiO 2 plays a crucial role in the high performance; ReO x is mainly responsible for the cleavage of C−O bonds, whereas Ir is responsible for hydrodeoxygenation and saturation of the benzene rings. This methodology opens up an energy-efficient route for the direct conversion of lignin into valuable naphthenes.
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高影响因子
Journal of Biobased Materials and Bioenergy
·
2024
·Vol. 18
·期 6
·1116-1124
·
IF 0.5
Cai Xin,Zhang Xuan,Zhou Yujun,Xia Nannan,Xu Xintong,Zhang Fengshan,Wang Jianmin,Wu Qin
A novel water-soluble polyurethane copolymer (i.e., LnBPU-[Zn(DOPA)2]) was synthesized through a route mainly using a prepolymer (i.e., BPU), lignin, dopamine and Zn2+ as the raw materials by cross-linking copolymerization. The optimal reaction conditions are as
follows: m(Lignin):m(BPU) is 1:4, time is 4 h and temperature is 70 °C. The prepared LnBPU-[Zn(DOPA)2] was turned out to improve the strength, resistance to water, oil and Escherichia coli of fibre when it was evenly coated on the paper
with a dose of 15 g/m2. SEM & EDS, FT-IR, GPC confirmed that the crosslinking copolymerization was enhanced by dopamine and Zn2+, which can give the polyurethane copolymer better strength and water and oil resistance. This study provided an efficient and green approach
for preparing lignin-based polyurethane, and contributes to the application of paper in more fields such as food or medical packaging.
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DOI
高影响因子
Science China-Materials
·
2024
·Vol. 67
·期 3
·954-964
·
IF 6.8
Chen Jiayue,Cao Meilian,Yue Yiying
The high-value utilization of lignin meets the demand for the reclamation of wastes and is of great significance for achieving carbon neutrality. However, lignin is unstable and prone to melting and deformation at high temperatures, requiring a long period of stabilization. The carbon nanofiber (CNF) membrane prepared by electrospinning has advantages such as high aspect ratio, low density, good light absorption, and a large number of pores favorable for steam transportation. Based on co-electrospinning, a lignin-based CNF membrane material was prepared in this work. The preparation process of this material can not only save the stabilization time of lignin-based nanofibers but also improves the hydrophilicity and light absorbance of the membrane through zinc chloride activation and the addition of pore-forming agents (terephthalic acid and polymethyl methacrylate). As a photothermal layer of an interfacial solar evaporation system, the membrane has a light absorption of 94.3% over the whole sun spectrum. Furthermore, the interfacial solar evaporation system with the prepared CNF membrane as the photothermal layer has an evaporation rate of 1.43 kg m −2 h −1 under one sun, with an evaporation efficiency of 93.8%. In addition, the evaporator has good circulation and salt resistance ability. After 15 h of continuous illumination, it still maintains excellent evaporation rate. This type of CNF membrane with lignin as the main carbon source has great potential as a photothermal conversion material in future desalination applications.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Jiang-Meng Yuan,Wen-Feng Ren,Ke Wang,Ting-Ting Su,Gao-Jie Jiao,Chang-You Shao,Ling-Ping Xiao,Run-Cang Sun
The three-dimensional structure of natural lignin is destroyed during the extraction and separation processes to generate the fractions with low molecular weight, which cannot be directly applied as high value-added binders for lithium-ion batteries because of its electrolyte solubility. Besides, the elasticity of polymeric binders is quite important to accommodate the large volume change of electrode materials during discharge and charge processes, whereas this problem is neglected. In this work, three-dimensional lignin (L)–polyacrylic acid (PAA) copolymeric binders (L-co-PAA) are designed and synthesized through esterification reaction between aliphatic −OH groups of L and −COOH groups of PAA. The L-co-PAA films with the mass ratio (1:3) of L to PAA possess the ultrahigh elasticity with 400 and 600% stretching for 300 cycles and tensile strain of 630%, mainly because the copolymerizing of L and PAA can weaken hydrogen bonding forces between PAA chains and the rotation of −C–O– single bond within ester linkage can further increase their elasticity, which contributes to maintain the integrity of the electrodes for lithium-ion batteries, especially for silicon-based electrodes. The silicon-based electrodes using L-co-PAA as binders display high initial coulombic efficiency (84%) and excellent cycling stability (939 mA h g–1 after 1000 cycles). This study offers a facile method for the fabrication of the low-cost polymeric binders with ultrahigh tensile strain and the implementation of the high-value utilization of lignin.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yangyang Ma,Ju Lin,Miaoyun Li,Yaodi Zhu,Lijun Zhao,Dong Liang,Dong Hyun Cho,Gaiming Zhao
In order to explore the influence of wood types on formation of polycyclic aromatic hydrocarbons (PAHs) in traditional smoked and grilled meat products, the effect of lignin in woods on formation of PAHs was investigated in meat model systems. The results showed that PAHs formation was much dependent on the heating conditions. The addition of lignin led to significantly increased PAHs, which being connected with lignin structure. In comparison, the formation of PAHs was more facilitated by lignin with G structure than that with G/S structure. However, further study of adding lignin precursors demonstrated that lignin precursors with S structure were more favorable to the formation of PAHs than those with G structure. It was proposed that the relative content and activity of G/S structure of lignin in wood played a significant role in the formation of PAHs, which might provide theoretical reference for inhibition of PAHs fundamentally.
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DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Yan Ma,Mu He,Jiaxuan Wang,Fuying Ma,Hongbo Yu,Yaxian Zhou,Shangxian Xie
Current sound-absorbing materials, reliant on nonrenewable resources, pose sustainability and disposal challenges. This study introduces a novel collagen-lignin sponge (CLS), a renewable biomass-based material that combines collagen's acoustic properties with lignin's structural benefits. CLSs demonstrate high porosity (>0.97), lightweight (10 mg cm − 3 ), and exceptional broadband noise absorption performance (sound absorption coefficient exceeding 0.9 across 2000–6300 Hz). Due to their unique hierarchical and aligned pore structure, CLSs display superior low-frequency sound-absorbing capabilities and a high noise-reduction coefficient of 0.64 (for a 30-mm-thick sample). A geometric model is also developed to evaluate and predict the sound absorption performance with high consistency to the experimental results. Additionally, the inclusion of lignin as a green crosslinker has significantly improved the thermal stability and compressive strength by ≈600% compared to collagen sponges alone. The innovative integration of collagen and lignin in this study not only leverages the benefits of renewable resources but also presents a cost-effective and straightforward preparation process, positioning CLS as a promising alternative for the construction of sound-absorbing materials seeking sustainable solutions.
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PubMed
高影响因子
Gels
·
2025
·Vol. 11
·期 4
·283
·
IF 5.3
Jianhong Lin,Mengyao Chen,Wei Zhao,Shengyu Zhang,Jialin Liu,Yang Zhou,Lei Jiang,Jiantao Zhang
In recent years, conductive polymer hydrogels based on polypyrrole (PPy) combined with electrical stimulation (ES) have emerged as a promising approach for chronic wound repair. However, in practical applications, PPy often exhibits limitations such as poor water dispersion, weak inherent conductivity and a lack of biological functionality. To address these challenges, this study proposes an innovative design of a conductive hydrogel that employs a natural biopolymer, lignin sulfonate (Lgs), as both a dispersant and dopant for PPy, while incorporating silver nanoparticles (Ag NPs) to confer the hydrogel antibacterial properties. The results showed that the water dispersion of PPy was significantly improved, and the conductivity of the hydrogel was as high as 2.82 ± 0.04 mS/cm through the double conduction mechanism of PPy and Ag NPs. The hydrogel exhibited antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), and the antibacterial rate could exceed 90%. In vitro tests demonstrated that the hydrogel exhibited good biocompatibility, adhesion ability (7.97 ± 0.56 kPa) and hemostatic ability. Furthermore, in vivo animal experiments showed that the hydrogel combined with ES achieved 93.71 ± 2.46% wound closure within 14 days, which can significantly accelerate wound healing, promote collagen deposition and epithelial tissue regeneration. These findings demonstrate that the developed hydrogel can serve as an effective platform for ES-assisted chronic wound repair.
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高影响因子
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