INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Wenchao Jia,Tianyuan Xiao,Yanzhu Guo,Pedram Fatehi,Yanning Sun,Meihong Niu,Haiqiang Shi
Condensed lignin formed during eucalyptus woodchip pre-hydrolysis adversely affects subsequent enzymatic saccharification , and phenolic additives are popular lignin condensation inhibitors. The goal of this project was to reveal the mechanisms of lignin modification by phenolic additives during woodchip pre-hydrolysis and its effects on subsequent enzymatic saccharification. The HSQC and 31 P NMR analyses confirmed that resorcinol with three electrophilic substitution of active sites could act as a cross-linking agent to promote the formation of condensed lignin, whereas 2-naphthol and sodium 2-naphthol-7-sulfonate could block benzyl carbocations and reduce the formation of condensed lignin. Interestingly, the introduction of sulfonic acid groups increased the electrostatic repulsion between enzyme and lignin as well as increased the hydrophilicity of lignin, thereby greatly reducing non-productive adsorption and physical obstacle effects. Sodium 2-naphthol-7-sulfonate as an efficient benzyl carbocations scavenger reduced the non-productive adsorption and physical obstacle effects of lignin by 82.4% and 13.3%, respectively.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yanqing Zheng,Xiheng Kang,Zi You,Yihan Li,Yongheng Huang,Tieguang He,Tianming Su,Arthur J. Ragauskas,Zhenglong Li,Qiong Wang,Xueping Song
As an “upstream” process in biorefinery, biomass dismantling can dismantle the natural stable structure of lignocellulosic biomass and separate its three major components. To increase the value of the entire biomass by fully utilizing the three main components (cellulose, lignin, and hemicellulose), this study proposes a two-step decomposition system combining formic acid (FA) pretreatment and ethylene glycol-NaOH (EGA) dismantling, aiming to effectively convert sugarcane bagasse into xylose, fermentable glucose, and high-value lignin. In the first step, FA pretreatment removed 79.85 % of hemicellulose at 140 °C for 90 min with 3 % FA. Based on the first step, further combination of EGA dismantling can achieve a hemicellulose removal rate of 92.05 % and a lignin removal rate of 95.90 %. In addition, the solid residue was hydrolyzed by enzymes, and the glucose conversion rate was close to 83.29 % when the cellulase dosage was 10 FPU/g. In addition, the lignin recovered by this system retained 83.62 % of the natural β-O-4 structure, which has the potential to catalyze the formation of aromatic monomers. In summary, this gentle two-step system simultaneously improves the efficiency of lignocellulose decomposition and produces different value-added products, demonstrating the potential for industrial-scale production.
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PubMed
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CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Lin Dong,Zhiqiang Fang,Qianbo Yuan,Yong Fan,Yong Yang,Ping Wang,Shixiong Sheng,Yanqin Wang,Zupeng Chen
Many strategies have been proposed to produce arenes from lignin as liquid fuel additives. However, the development of these methods is limited by the low yield of products, low atom utilization, and inefficient lignin depolymerization. Herein, we develop an energy-efficient synthetic method for the production of high-carbon-number arenes from sustainable lignin with a total yield of 23.1 wt%. Particularly, high carbon number arenes are obtained by fully utilizing the formaldehyde stabilizing additive and the methoxy group in lignin. The process begins with the reductive depolymerization of formaldehyde-stabilized lignin, followed by transmethylation between lignin monomers over Au/Nb 2 O 5 catalyst, and the Ru/Nb 2 O 5 -catalyzed hydrodeoxygenation. This work demonstrates the potential of value-added arenes production directly from lignin.
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Journal of Water Process Engineering
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2024
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IF 6.3
Wanrong Lv,Jialong Wu,Xiaozhen Ma,Xiaobo Xu,Xiaolin Wang,Jin Zhu,Ning Yan,Jing Chen
Superhydrophobic polyurethane foam has great potential to be used as adsorbent for cleaning up oil spills. In this study, lignin and castor oil were used as alternative resources to petroleum-based raw materials for the production of degradable polyurethane foams for oil spill treatment. SiC was first modified by 1H, 1H, 2H, 2H-perfluorododecyltrichlorosilane (FDTS) to obtain F-SiC. F-SiC was superhydrophobicity with an irregular crystalline structure of diameters ranging from 20 to 500 nm. It was incorporated into the matrix of lignin and castor oil derived polyurethane foam. With the addition of F-SiC, the water contact angle of the foam increased to 151.7 °C to render the foam superhydrophobic. After 100 cycles of mechanical compression, the foam showed a good elastic recovery ability. It is shown in SEM that F-SiC was distributed on the foam skeleton. Under 1 KW/m 2 sunlight intensity, the temperature of the foam went up to 88.8 °C. On top of that, the foam showed excellent self-cleaning and oil-absorbing properties. It degraded within 4 h in alkaline solutions. Therefore, these castor oil and lignin derived bio-based polyurethane foams possess good mechanical stability, fast oil absorption, and alkaline degradability which has good application prospects in oil spill cleanup.
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ACS Applied Polymer Materials
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2025
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IF 4.7
Huawei Su,Hongzhi Liu,Zhihao Su,Haoyue Gao,Furui Ma,Qingqing Lu,Wenchao Yan,Libin Liu
Hydrogel electrolytes with antifreezing performance and excellent mechanical properties have become a research hotspot, but the general preparation process requires time and energy consumption, limiting the scope of applications. In this work, a simple, universal, and fast gelation based on a sodium lignin sulfonate macromolecule–zinc ion (LS-Zn2+) self-catalytic system is developed. The catechol group of LS can coordinate with Zn2+ to form complexes and accelerate the establishment of reversible oxidation–reduction, which can promote the rapid polymerization of vinyl monomers by generating various free radicals (OH• and 1O2). The gelation process does not require any additional energy and can be completed within 5 min by controlling the mass fraction of LS and the concentration of Zn2+ or acids. The mechanical strength of the preferred hydrogel electrolyte can reach a tensile stress of 0.14 MPa under 1750% strain. The hydrogel electrolyte possesses an excellent conductivity of 3.67 mS cm–1 at extreme temperatures as low as −40 °C. The hydrogel electrolyte sensor can detect various parts of the human body in a wide temperature range with stable output resistance signals. This work provides a LS-Zn2+ self-catalytic method for the rapid preparation of multifunctional hydrogels.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jie Huang,Xuejun Liu,Ding Yuan,Xiaolan Chen,Minghui Wang,Meiyue Li,Lixue Zhang
Lignin upgrading to various functional products is promising to realize high-value utilization of low-cost and renewable biomass waste, but is still in its infancy. Herein, using industry waste lignosulfonate as the biomass-based carbon source and urea as the dopant, we constructed a heteroatom-doped porous carbon nanosheet structure by a simple NaCl template-assisted pyrolytic strategy. Through the synergistic effect of the NaCl template and urea, the optimized lignin-derived porous carbon catalyst with high content of active nitrogen species and large specific surface area can be obtained. As a result, the fabricated catalysts exhibited excellent electrocatalytic oxygen reduction activity, as well as good methanol tolerance and stability, comparable to that of commercial Pt/C. Moreover, rechargeable Zn-air batteries assembled with this electrocatalyst have a peak power density of up to 150 mW cm -2 and prominent long-term cycling stability. This study offers an inexpensive and efficient way for the massive production of highly active metal-free catalysts from the plentiful, inexpensive and environmentally friendly lignin, offering a good direction for biomass waste recycling and utilization.
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BIORESOURCE TECHNOLOGY
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2025
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IF 9
Jing Cao,Peiling Liu,Fangmei Teng,Jialing Liu,Yuting Ni,Xianghui Liu,Jiali Mu,Cen Zhang
Achieving both high activity and good stability remains a challenge for the design of MoS 2 -based catalysts in the hydrodeoxygenation (HDO) reaction. Herein, a robust catalyst with single-layer CoMoS anchored on hydrophobic reduced graphene oxide (SL-CoMoS/rGO) was fabricated, which exhibited high activity, selectivity and excellent stability in the HDO of lignin-derived phenolics to arenes. Utilizing the HDO of 4-methylphenol as a probe reaction, the catalyst afforded a conversion of 98.3 % and a toluene selectivity of 99.2 % at a mild condition of 210 °C and 3.0 MPa. The superior HDO performance was ascribed to the high dispersion of MoS 2 particles, which provides a large amount of edge sites for the efficient Co decoration to form the Co-Mo-S active centers. Thus, the Mo-S bond at the edge sites was significantly weakened and the formation of sulfur vacancies was remarkably enhanced. Besides, density functional theory calculations reveal that Co-Mo-S active phase could not only favor the adsorption of 4-methylphenol but also lower the energy barrier of the rate-determining step. Moreover, no obvious deactivation was observed for SL-CoMoS/rGO after six HDO cycles. The excellent durability was benefitted from the hydrophobic surface and lowered reaction temperature, which could effectively alleviate the sulfur loss and particle sintering.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Yinzheng Li,Guixin Guo,Tianying Chen,Peng Lu,Yanjun Tang
To promote the functionalization of chitosan-based films, lignin separated from Moso bamboo using type IV deep eutectic solvents (DESs; FeCl 3 /glycerol (Gly), AlCl 3 /Gly, and CuCl 2 /Gly) was incorporated into chitosan to prepare lignin/chitosan composite films. For comparison, lignin pretreated with an aqueous NaOH solution was prepared and used for forming a film. The systematic characterization of lignin samples and lignin/chitosan composite films was performed using advanced analytical techniques. Gel permeation chromatography showed that the type-IV-DES-pretreated lignin sample possessed a lower molecular weight and more uniform structure than the NaOH-pretreated lignin sample, which was more conducive to increasing the compatibility between lignin and chitosan. 31 P nuclear magnetic resonance spectroscopy and two-dimensional heteronuclear correlation results revealed that the excellent antioxidant activity of lignin following AlCl 3 /Gly pretreatment was due to the high phenolic hydroxyl group content (1.16 mmol/g). Moreover, the free-radical scavenging capacity of the resulting DES-pretreated lignin/chitosan composite film reached 83.12 %, which was 3.4-fold higher than that of the pure chitosan film. In general, type-IV-DES-pretreated lignin was superior to NaOH-pretreated lignin in terms of enhancing the ultraviolet-shielding ability, antioxidant capacity, and antibacterial properties of the chitosan films. Notably, these films have great potential for use in food packaging applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Jin-Ling Wu,Hong-Jia Xiang,Rui Zhang,Cheng-Long Wang,Yi-Xin Zhang,Ling Xiao,Zhen-Lin Xu,Hong Wang,Peng Wen
The current anthocyanin-based intelligent pH indicator has poor ultraviolet (UV) blocking performance, which results in color fading and greatly limits its application in freshness monitoring. Lignin nanoparticle (LNP), with aromatic skeleton and phenolic hydroxyl groups, is a promising green alternative to reinforce UV shielding property. Herein, a colorimetry-enhanced and UV-blocking intelligent film encapsulating purple sweet potato anthocyanin (PSPA) and LNP was developed by electrospinning poly (vinyl alcohol) (PVA) and zein. The results revealed that a bead-free and continuous microstructure was obtained for the PVA/Zein/PSPA/LNP-2 film, which also achieved excellent 99.99 % UVA and UVB blocking. Light exposure experiments showed that the incorporation of LNP significantly improved the color stability of PSPA. Besides, the film demonstrated higher tensile strength (26.98 MPa) and elongation at breaks (66.06 %). Furthermore, the nanofiber structure endowed the film with sensitive color responsiveness to detect shrimp freshness with color changing from pink to blue. These results suggested the great potential of developed nanofilm as an intelligent indicator.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jiansheng Qiu,Tengteng Dong,Chenchen Cai,Yongfei Liu,Fangyuan Tang,Qingdi Hu,Xunxiao Wu,Xusheng Li
Pulp-molded utensils (PMUs) are gaining attention as biodegradable alternatives to petroleum-based plastics, yet their adoption is hindered by poor freeze–thaw durability and the lack of fluorine-free oil resistance strategies. Here, a bio-based and scalable approach was presented to fabricate robust, oil-resistant PMUs by leveraging lignin-driven fiber welding and conformal coating with poly(3-hydroxybutyrate- co -4-hydroxybutyrate) (PHB). Residual lignin undergoes thermocompression-induced self-fusion and inter-fiber crosslinking, enhancing structural cohesion and network densification. Simultaneously, co-melted lignin and PHB form a continuous surface barrier, imparting superior oil repellency (Grade 12) and effectively blocking hot oil penetration. The resulting PMUs exhibit high density (0.83 g cm −3 ), low porosity (42.49 %), and mechanical strength up to 25 MPa, while maintaining integrity over multiple freeze–thaw cycles. Life cycle analysis confirms full biodegradability and a reduced carbon footprint. This lignin-enabled strategy offers a sustainable and high-performance route for disposable tableware.
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LANGMUIR
·
2025
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IF 3.9
Lei Qiao,Zhihong Zhou,Mingkun Wang,Zhiwei He
Frequent oil spills and the discharge of oily wastewaters have caused a serious threat to the environment, ecological systems, and the health of human beings. Herein, a durable photothermal and superhydrophobic melamine sponge has been prepared by decorating lignin microspheres (LMs) and TiO2 nanoparticles via the self-polymerization of dopamine. The superhydrophobic sponge shows excellent chemical stability, thermal stability, mechanical durability, and recyclability. The adsorption capacities of the superhydrophobic sponge for oils and organic solvents range from 22.4 to 84.2 g/g, showing high separation efficiencies larger than 98.6% after 15 cyclic tests. Due to the photothermal effect, the maximum surface temperature of the superhydrophobic sponge reaches 65.2 °C under solar irradiation (1 sun), and the superhydrophobic sponge successfully achieves the ice-free property at a low temperature of −17.8 °C under solar irradiation (0.5 sun). Besides, the LMs@TiO2 composite coating can be employed on several substrates (i.e., filter paper, carbon cloth, steel mesh, Al sheet, Cu sheet, and NdFeB) to realize surface superhydrophobicity, and exhibits excellent anticorrosion for the coated NdFeB. Therefore, this study proposes a low-cost and multifunctional superhydrophobic MS, opening a new avenue to the rational design of superhydrophobic MS for applications in oil/water separation, anti-icing, and anticorrosion.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Rongzhi Li,Xuan Zhou,Minggui Shen,Qiaoguang Li,Xu Xu,He Liu,Zhanqian Song
Traditional adhesives are facing severe challenges, mainly reflected in their poor degradation performance and the raw materials are mostly derived from petroleum-based resources. A self-curable benzoxazine epoxy curing agent was synthesized in this work. Lignin-based polybenzoxazine modified epoxy resin (PL-PBz-AE) was obtained by curing acrylpimaric acid diglycidyl ester (AE) with phenolic lignin-ethanolamine benzoxazine (PL-BOZ). The anchoring effect can be accelerated by the use of ether bonds, the formation of a specific molecular structure after ring opening of the oxazine ring, and multiple hydrogen bonds, which form localised hydrophobic zones. PL-PBz-AE exhibits excellent and stable adhesion properties in underwater environments on a variety of substrates, including stainless steel, aluminum, and ceramics. The incorporation of lignin-derived polyphenolic architecture endows PL-PBz-AE with remarkable interfacial adhesion capabilities, demonstrating superior shear strength values of 3.96 MPa for stainless steel substrates, along with 2.15 MPa and 0.73 MPa for aluminum and ceramic interfaces respectively. This binder system hydrolyzes its carboxyl group in an alkaline solution, and we have a strategy for the specific design of a 1 N NaOH solution, which exhibits a unique alkali-responsive degradation, in which case the resulting oligomer intermediate can rapidly decompose the material through a solution-mediated chain cleavage mechanism. In addition, PL-PBz-AE can also be applied to underwater bonding and underwater pipeline leakage. These multifunctional attributes-combining robust adhesion, controlled degradability, environmental stability, and thermal stability establish PL-PBz-AE as a next-generation adhesive platform that successfully reconciles industrial performance requirements with sustainable material design principles.
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