INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Zhiyou Tan,Shan Wang,Zhuorong Hu,Weilong Chen,Zhencai Qu,Changan Xu,Qian Zhang,Kun Wu,Jun Shi,Mangeng Lu
In this work, we offered a facile strategy to produce lignin microspheres (LMS) with loading of benzotriazole (BTA) inhibitors, which were released as the pH changed. The morphological and compositional characterizations demonstrated that the BTA inhibitors were efficiently encapsulated in the LMS whose load was up to 15.5 wt %. Tests of crossed scratches of coatings indicated that the LMS@BTA/pure waterborne epoxy resin (WEP) had a good self-healing property. By the electrochemical impedance spectroscopy test, the long-term anticorrosion property of LMS@BTA/WEP composites was 1 order of magnitude higher than that of WEP, which indicated that LMS@BTA greatly improved the corrosion resistance. The highly effective anticorrosion should be attributed to the pH-responsive release behavior of BTA from LMS, which actively protected the steel substrate. The enhanced anticorrosion and the controlled release of BTA enlarged the high value-added applications of lignin.
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DOI
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Ming Li,Liwei Zhu,Honggang Xiao,Tao Shen,Zhuotao Tan,Wei Zhuang,Yuebin Xi,Xingxiang Ji,Chenjie Zhu,Hanjie Ying
This work designed a lignin-based reinforcing agent for reinforcing natural rubber (NR) via building up an integrated interfacial network. A facile lignin modification approach was developed using a cyclic anhydride with a long alkene chain, (2-dodecen-1-yl)succinic anhydride. The grafting of the modifiers preferentially takes place at the aliphatic −OH sites as indicated by 2D heteronuclear single-quantum coherence and 31P NMR spectra. The amount of grafted modifier was estimated via TGA, being 27.1 and 48.8 wt % for the two modified lignin samples. The high degree of modification results in an elevated molecular weight, reduced Tg, and improved hydrophobicity. The NR composites show comparable mechanical properties when 30 wt % of carbon black was replaced with modified lignin. The modification of lignin generates more −COOH groups, which facilitates coordination interactions, and the introduction of zinc dimethacrylate imparts further improved mechanical properties beyond the counterpart with carbon black, especially for the stress at low deformation. Stress relaxation and cyclic tensile tests reveal that these composites are able to largely keep and recover the network structure due to the coordination interaction. This work provides a versatile lignin-based reinforcement for more sustainable and higher-performance NR composites.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Boyu Du,Wanjing Li,Yating Bai,Zheng Pan,Qingyu Wang,Xing Wang,Hui Ding,Gaojin Lv,Jinghui Zhou
The construction of lignin nanoparticles (LNPs) with both lignin properties and nanomaterial properties through controlling the morphologies and structures of lignin is one of the effective ways to realize its application in the field of biomedicine. Firstly, the morphology and chemical structure of LNPs were studied in detailed. The results showed that the chemical structural characteristics of LNPs had not changed significantly and its morphology was more regular shape and narrower size distribution (50–350 nm). Besides, LNPs also exhibited excellent water dispersion stability and high negative zeta potential . Subsequently, LNPs as wound dressings had good antioxidant property, excellent adsorption capacity of protein, outstanding bactericidal activity and remarkable biocompatibility , suggesting that LNPs did not interfere with cell proliferation during wound healing . Finally, the in vivo results of mouse wounds further illustrated that treatment of wounded skin wounds with LNPs enhanced its effective healing. After 15 days, as compared with the untreated control and original lignin (OL) groups, the wounds treated of LNPs was completely closed and granulation tissue formation was advanced. Overall, this study can be a good method for high-value applications of LNPs, and highlighting the advantages of using lignin as medical adjuvant nanomaterials to accelerate wound healing.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 34
·期 1
·110-117
·
IF 1.408
Zhu Jundong,Gan Linhuo,Li Baoxia,Yang Xin
Three kinds of solid acid catalysts were prepared from alkali lignin in the waste liquor of pulping using carbonation- sulfonation method with different pretreatment. The lignin-derived solid acids (LDSAs) were characterized by FESEM, XRD, FTIR, TGA, BET and acid-base titration, respectively. A comparison study on the catalytic performance of LDSA prepared by different pretreatment method before carbonation in the hydrolysis of microcrystalline cellulose (MCC) was carried out. Results showed that the LDSA prepared by chemical activation with phosphoric acid (LPC-SO 3 H) exhibited superior catalytic activity due to its higher densities of -COOH group (1.68 mmol/g) as binding site and -SO 3 H group (0.88 mmol/g) as catalytic site as well as its larger specific surface area (488.4 m 2 /g) than those of the other two LDSAs. A total reducing sugar yield of 50.8% in MCC hydrolysis was obtained under the reaction conditions of temperature of 180 °C, time of 3 h, MCC concentration of 6 mg/mL and mass ratio of catalyst to MCC of 3.3 (w/w). Additionally, the value activation energy for hydrolysis of MCC to reducing sugars using LPC-SO 3 H was 83.31 kJ/mol, which was smaller than that using sulfuric acid.
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iScience
·
2021
·
IF 5.458
Jiarui Zhang,Ruxu Yao,Jinzhu Chen,Tao Li,Yisheng Xu
Nitrile (C≡N bond) activation for direct organic synthesis has been less explored so far due to a high redox potential of nitrile and its low dissociation energy of C−CN bond. Herein, we demonstrate a direct reductive coupling of nitriles and 1,2-phenylenediamines to yield various benzimidazoles in excellent yields (95%–99%) by using rhodium phosphide (Rh 2 P) catalyst supported on lignin-derived carbon (LC) using H 2 (or hydrazine hydrate) as a hydrogen source. The high catalytic performance of Rh 2 P/LC is attributed to enhanced charge transfer to Rh and strong P−Rh interactions. Our isotope trace experiment confirms the presence of H/D exchange between H 2 and the inert –CD 3 group of CD 3 CN via an intramolecular D-shift. Reusability of Rh 2 P/LC is further demonstrated by a seven-time recycling without evident loss of activity. This research thus highlights a great potential in organic transformation with nitrile as a synthetic building block.
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DOI
PubMed
高影响因子
Eco-Environment & Health
·
2023
·
IF 0
Shunyao Li,Dan Hong,Kai Sun
Humification plays a significant role in converting phenolic pollutants and forming heterogeneous polymers, but few studies have been performed to investigate exolaccase-started humification (ESH). Herein, the influences of lignin precursors (LPs) on exolaccase-induced bisphenol A (BPA) removal and humification were explored. In particular, the architectural features and botanical effects of the formed humification products were also tested. ESH was extremely beneficial in boosting BPA removal in the presence of LPs. Compared with LP-free (58.49%), 100% of BPA was eliminated after the reaction with ESH for 72 h. Such a process was controlled by an exolaccase-caused random assembly of radicals, which generated a large number of hydrophobic polymers through nonspecific covalent binding of C–C and/or C–O. These humified polymers were extremely stable at pH 2.0–10.0 and −20 °C to 80 °C and displayed unique functions, i.e. , scavenged 2,2-diphenyl-1-picrylhydrazyl/2,2′-azino-bis3-ethylbenzothiazoline-6-sulphonic acid radicals and exerted antioxidant capacities. More importantly, the functional polymers could act as auxin analogs to increase the germination index (>100%), plant biomass, and salt tolerance of radish seedlings. Our findings disclosed that ESH could not only be optimized to mitigate the ecological risks of phenolic pollutants and sequester organic carbon in environmental bioremediation, but the resulting abundant auxin analogs also contributed to agricultural productivity.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Fei Huang,Sikun Zhou,Ziyang Yan,Sha Wang,Hong Zhang,Shutong Wang,Shouhuan Zhou
Electrode materials significantly impact supercapacitor performance and developing high-performance electrode materials is crucial in energy storage. Commonly used laser-induced electrode materials are currently limited by severe contamination and hard-to-change intrinsic properties. This paper proposes a method for fabricating high-performance supercapacitors by laser carbonizing the lignin composite fiber membranes with heating treatment. Lignin fiber can achieve superior tensile strength, stiffness, and carbonization degree under suitable heat treatment temperatures. Heat treatment at 450 °C has been proven to be the ideal temperature for supercapacitor performance. At a current density of 1 A/g, the supercapacitor can reach the highest specific capacitance of ∼391.2F/g. In addition, doping MoS 2 boosted the device's performance to a specific capacitance of ∼527.8F/g, a power density of ∼500 W/kg, and an energy density of ∼73 Wh/kg at the same current density. In addition, lignin fibers are ideal materials in electronic textiles due to their soft, thin, and breathable properties. This study provides supportive evidence and technical guidance for improving the performance of flexible wearable supercapacitors.
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NORDIC PULP & PAPER RESEARCH JOURNAL
·
2024
·Vol. 39
·期 4
·719-730
·
IF 0.9
Yuyang Ma,Yanjie Yi,Yi Hou,Lirong Lei,Songqing Hu
In order to fully utilize industrial lignin, a comparative study was conducted on the properties of porous carbon electrodes prepared by activating different industrial lignin as precursors. The results revealed that carbon electrodes prepared with sodium lignosulfonate (CM-S) exhibited superior specific surface area (SSA) (1,593.5 m 2 g −1 ) and pore volume (PV) (1.03 cm 3 g −1 ) due to the largest relative molecular mass (Mn = 4,539, Mw = 7,290), which is greater than that prepared with alkali lignin (CM-A) and kraft lignin (CM-K), and displayed a well-developed micro-mesoporous macropore hierarchy which was feasible for the efficiency of electron mobility. The electrochemical properties of materials were evaluated, and CM-S showed a mass-specific capacitance of 201 F g −1 at 0.2 A g −1 current density, along with an impressive capacitance retention rate of 54.7 % at 10 A g −1 current density, which is more potential than CM-A and CM-K (specific capacitances: 100 F g −1 and 75 F g −1 respectively). Additionally, maximum energy and power density of CM-S were measured to be 6.98 W h kg −1 and 2306 W kg −1 with excellent retention rate of 95.5 % after 10,000 charge–discharge cycles at a current density of 5 A g −1 . Comparatively, sodium lignosulfonate, compared with alkali lignin and kraft lignin, emerges as a more ideal precursor material for porous carbon electrode.
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JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Ming Yong,Yuqing Zhang,Shuai Sun,Wei Liu
Usually seen as a waste with low chemical value and limited commercial potential, lignin produced in large quantity from paper industry performs abundant valuable hydrophilic groups which make it a potential hydrophilic assistant. In this contribution, in order to improve hydrophilicity and antifouling properties of PVC ultrafiltration membrane, lignin was doped into PVC to prepare a uniform sol under strengthening heat and mass transfer process, and then PVC/lignin ultrafiltration membranes were prepared via phase inversion strategy. The resulted PVC/lignin ultrafiltration membranes were characterized by SEM, FT-IR, XPS , DSC and were also tested by oily wastewater. According to the results of SEM, XRD and DSC analyses, PVC is compatible with lignin and the homogeneous PVC/lignin sol can be formed. The hydrophilicity of membrane is significantly enhanced with water contact angle (WCA) decreasing from 106.73° to 41.53°. Particularly, the PVC/lignin ultrafiltration membranes exhibit attractive properties with oil rejection of 97.36% and oily wastewater permeation flux of 156.55 L m −2 h −1 (0.1 MPa), nearly 2.5 times that of pure one (65.06 L m −2 h −1 ). Lignin suggests to be a superior additive to improve hydrophilic and anti-fouling properties of PVC membranes, and the lignin-modified membranes are promising candidates for cleaning oily wastewater and sewage.
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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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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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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Liang Wei,Keyu Qu,Jun Huang,Zhe Li,Xianyi Ning,Xiande Yang,Meng Li,Hongxi Zhang,Jing Yang
Lignin, one of the most prevalent organic polymers on Earth, is predominantly produced as a byproduct in the pulp and paper industry and is frequently disposed of as waste, posing substantial environmental challenges. The carbon‑carbon (C C) bonds in lignin are notably stable, complicating catalytic activation and cleavage. This study presents a significant advancement in the visible-light-driven cleavage of lignin's recalcitrant C C bonds (specifically the β-1 type) utilizing mixed-phase TiO 2 (P25) under ambient conditions. In contrast to conventional approaches that emphasize C O bond scission, the P25 catalyst achieves a 93 % conversion rate and 87 % selectivity towards benzaldehyde from 1,2-diphenylethanol without the use of noble metals or complex modifications. Density Functional Theory (DFT) calculations reveal that the rutile {110}/anatase {101} interface lowers the energy barrier for ·O₂ − generation, corroborating experimental selectivity trends. The synergy between these facets facilitates interfacial charge transfer, generating superoxide radicals (·O₂ − ) as the dominant reactive species for C C activation. When applied to native lignin, β-1 and β-β bonds have been completely broken, with over 70 % of β-5 bonds also cleaved. In contrast, only 3 % of β-O-4 bonds were broken, validating scalability beyond model compounds. This work provides a solar-driven, metal-free route to valorize lignin waste, addressing both environmental and energy challenges.
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