ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Junming Gai,Di Meng,Dandan Zhou,Qiulu Chu,Jing Wang,Shufang Wu
Organosolv pretreatment effectively fractionates lignocellulosic biomass, producing high quality lignin. However, this pretreatment approach is still limited in achieving satisfactory cellulose hydrolysis and boosting lignin valorization. This work proposed a carbocation scavenger assisted diol organosolv pretreatment to address these challenges. As a result, 97.12% of cellulose could be converted to glucose after this sodium 2-naphthol-7-sulfonate (NS) assisted dilute acid-1,4-butanediol (DA-BDO) pretreatment and subsequent enzymatic hydrolysis. ATR-FTIR, GPC, 31P NMR, and 2D HSQC NMR analyses suggested the lignin repolymerization suppressing effect of BDO and the lignin depolymerization facilitating effect of NS, which probably resulted in the extensive delignification and significantly mitigated lignin inhibition on cellulose hydrolysis, accounting for the satisfactory cellulose hydrolysis. Meanwhile, the resultant DA-BDO-NS organosolv lignin (OL) was rich in phenolic hydroxyl groups with a low molecular weight, which was related to strong antioxidant and antibacterial activity. This work proposed possible mechanisms for the modified organosolv pretreatment in boosting enzymatic saccharification of softwood, while the lignin stream had great potential for value-added application for sustainable lignocellulosic biorefinery.
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DOI
高影响因子
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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高影响因子
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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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Zhili Li,Duo Xiao,Yuanyuan Ge,Stephan Koehler
The development of ecofriendly sorbents for fast and efficient removal of heavy metals from aqueous media still remains a significant challenge. Here, we report that this task can be addressed by creating a porous naturally occurring polymer, as illustrated by functionalizing lignin with large numbers of mesopores and functional groups. We show that surface-functionalized porous lignin (SFPL), obtained by a two-step process, has a large surface area of 22.3 m2/g, 12 times that of lignin, and a high density of dithiocarbamate groups (2.8 mmol/g). SFPL was found to exhibit an excellent adsorption performance toward lead ions dissolved in water. For example, 99% of the lead ions from 50 mL of a solution containing 20 mg/L lead ions was removed in just 30 min by 0.01 g of SFPL. The saturated adsorption capacity of SFPL for lead ions was found to be 188 mg/g, which is 13 times that of the original lignin and 7 times that of activated carbon. The adsorption process is endothermic and involves intraparticle diffusion and chemical adsorption between lead ions and the functional groups of SFPL. The cost effectiveness and environmental friendliness of SFPL make it a promising material for removing lead and other heavy metals from wastewater.
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高影响因子
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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高影响因子
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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高影响因子
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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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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高影响因子
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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高影响因子
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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高影响因子
Journal of Renewable Materials
·
2021
·Vol. 9
·期 11
·1913-1926
·
IF 1.67
Gu Xiaohua,Lyu Shiwei,Liu Siwen
A bi-component alcoholysis agent containing propylene glycol (PG) and ethanolamine (ETA) was used to catalyst the degradation of the waste polyurethane rigid foam. The oligomer polyols obtained through degradation were used as raw materials to produce recycled polyurethane rigid foam
composites with lignin as reinforcing filler. The effect of alcoholysis mass ratio on degradation was investigated by analyzing the viscosity, hydroxyl content and chemical structure of the degradation products. The effect of lignin addition on the properties of regenerated polyurethane rigid
foam were investigated by analyzing water absorption rate, compressive strength, porosity, thermal stability, thermal conductivity coefficient, morphology and thermal stability of the recycled polyurethane rigid foam. Results show that different mass ration of PG to ETA significantly affects
the degradation of waste polyurethane rigid foam. Besides, only with the addition of appropriate amount of lignin, the regenerated polyurethane rigid foam composites can meet the Chinese national standard "rigid polyurethane foam for building thermal insulation" (GB/T21558-2008). At this point,
the composite is with good mechanical and thermal prperties, including high compressive strength, excellent thermal insulation performance, complete cell morphology and good thermal stability.
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高影响因子
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