Waste and Biomass Valorization
·
2018
·Vol. 10
·期 11
·3343-3350
·
IF 1.874
Chen Cheng,Jiang Linfeng,Ma Guanfeng,Jin Dongxue,Zhao Lisha,Ouyang Xinping
Abstract Lignin removal from lignocellulosic materials plays a great role in the utilization cellulose with high efficiency. In order to improve the quality of reconstituted tobacco sheet, lignin existed in tobacco stem was removed by enzymatic hydrolysis with laccase enhanced by weak alkali treatment together with the addition of Tween 80 into laccase treatment system. It is found that lignin was partially removed by laccase. The treatment of tobacco stem with NaHCO 3 resulted in the dissolution of lignin, and hence increased the porosity and specific surface area of the pretreated tobacco stem. Consequently, laccase could access to the tobacco stem more completely. The surface activity and dispersion of Tween 80 improved laccase activity, solubilization of degraded products of lignin, and contact interface between laccase and tobacco stem. The synergistic action of laccase, weak alkali and Tween 80 improved the ratio of lignin removal significantly, reaching as high as 40.3%. Graphical Abstract
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ENERGY & FUELS
·
2019
·
IF 3.021
Yanliang Song,Xiaoyou Shi,Xue Yang,Xu Zhang,Tianwei Tan
A successive organic solvent fractionation was reported in this work to obtain lignin fractions with narrow molecular weight distribution and high purity from p-toluenesulfonic acid-extracted lignin. A decrease was found in PDI of fractionated lignin compared with parent substrate from 3.31 to 1.44 and the amount of carbohydrate derivates was detected to decline implying an increase of purity. Calculated from the results of DTG, thermal stability of lignin samples was enhanced through successive fractionation, and TG data showed that the mass of remaining char over 500 °C decreases from 51% of initial lignin to 25% of fractionated ones. There was also a decline of glass transition temperature (Tg) determined, from 142.5 to 100.8 °C. Lignin fractions that were dissolved in ethanol and acetone possessed high contents of summed aliphatic and phenolic hydroxyls might due to formation of numerous hydrogen bonds. As shown in 1H–13C HSQC NMR spectra, lignin fractions dissolving in ethyl acetate contained more C–C bonds, mainly β–β, compared with other samples.
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Polymers
·
2025
·Vol. 17
·期 8
·1029
·
IF 4.9
Caiyun Liu,Shuzhen Ni,Zhaojiang Wang,Yingjuan Fu,Menghua Qin,Yongchao Zhang
During the conventional biomass fractionation, the degradation and dissolution of lignin and hemicellulose result in a complex extract which remains very challenging for the thorough separation and purification of a wide variety of fractionated products, limiting their further utilization. Herein, we proposed a facile and efficient strategy for fractionating biomass and simultaneously in situ converting of both lignin and hemicellulose into single products using a formic acid–phloroglucinol system. The introduced phloroglucinol could react with lignin fragments and hemicellulose-derived products, and the generated intermediate product from hemicellulose can be further condensed with lignin fragments, finally forming single lignin-based functional biopolymers containing heterocyclic structures. Only small amounts of hemicellulosic derivatives, such as oligosaccharides, monosaccharides, furfural, and 5-HMF, were detected in the extracted solution, indicating a highly directional and effective in situ conversion process of hemicellulose. The constructed specific structures on fabric surfaces by using the chelation between lignin-based functional biopolymers and metal ions achieved the preparation of functional fabrics with stable hydrophobicity. The dynamic contact angle of water droplets on the surface of prepared fabric only decreased from 122° to 116.8° over 30 min. This work strategy provides an ideal route to maximize the utilization of both lignin and hemicellulose without involving complex separation and purification procedures. This strategy is the first demonstration of using the targeted fractionation system to achieve the simultaneous conversion of hemicellulose and lignin into single functional biopolymers directly from lignocellulosic biomass.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wenda Wang,Shaofei Nie,Chunyi Luo,Li Xu,Xue Zhang,Siyu Liu,Zhiping Wu,Fuquan Xiong,Lishu Shao,Weihua Luo
Reactive oxygen species-based chemodynamic therapy overcomes the tissue penetration limitations inherent in traditional photodynamic therapy and sonodynamic therapy for tumor treatment, thereby garnering significant attention. However, the transient nature of reactive oxygen species and the nonspecific release of chemotherapeutic agents remain great challenges in chemodynamic therapy. In this study, a dual-network nanosystem based on ellagic acid-modified lignin grafted with vinyl pyrrolidone copolymer and loaded with paclitaxel (EAMLVP@PTX) is constructed. While exposed to the acidic tumor microenvironment, the nanoparticles undergo a charge reversal, inducing cationic endocytosis of tumor parenchymal cells. Furthermore, ellagic acid units endow the nanosystem with mitochondrial targeting capability in colon cancer cells. Consequently, reactive oxygen species is produced, resulting in the partial activation of the dynamic network within the nanosystem and further release of anti-cancer drugs, which in turn generates additional reactive oxygen species. This creates a self-sustaining reactive oxygen species cycle, initiating programmed cell death to enhance anti-tumor treatment under sustained oxidative stress. Both in vitro and in vivo experiments demonstrate that the nanosystem exhibits significant antitumor efficacy against colon cancer, with minimal side effects observed. The EAMLVP@PTX effectively addresses the challenges associated with the short life of reactive oxygen species and the specificity of drug delivery, and demonstrates prominent chemo/chemodynamic synergistic therapeutic effects, thereby offering a highly promising strategy for cancer treatment.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Qing Qiu,Xuejian Sun,Han Li,Fenglin Zhang,Dandan Zhou,Kejian Tian,Xinwen Zhang,Hongliang Huo
Polystyrene (PS), being resistant to biodegradation, poses a significant environmental challenge. This study isolated highly effective lignin-degrading microbial consortia from samples collected at six sites rich in lignin-degrading bacteria. After 360 days of enrichment, a stable lignin-degrading microbial consortium, LQX-03, was successfully established. LQX-03 demonstrated notable degradation efficiency not only for lignin (21-day degradation rate of 54.6 %) but also for PS (21-day degradation rate of 13.1 %). Importantly, PS-induced LQX-03 communities overlapped with the original lignin communities in 13 genera, revealing a close relationship between the degrading microbial compositions of the two substrates.Additionally, Pseudomonas putida Q1, isolated from LQX-03, exhibited significant capability in simultaneously degrading lignin and PS, achieving degradation rates of 36.1 % and 4.4 %, respectively. The strain was also able to alter the functional groups of PS, increasing its hydrophilicity. Gene and enzyme expression analyses revealed that key lignin-degrading enzymes, such as laccase (CopA) and DyP peroxidase, were significantly upregulated when PS was the sole substrate. Laccase CopA expression increased by 1.76-fold and 1.41-fold, while DyP expression increased by 1.24-fold. These results indicate that these enzymes likely play a crucial role in PS depolymerization and biodegradation. Further molecular docking analysis confirmed that laccase CopA could bind to PS. In summary, this study provides preliminary insights into the potential links between lignin-degrading and plastic-degrading microorganisms and their enzymes. It suggests that the biodegradation of synthetic plastics may rely on ancient natural lignin-degrading enzymes. These findings offer a new perspective and valuable data for developing efficient plastic biodegradation strategies.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Cheng-Ye Ma,Xiao-Peng Peng,Shaolong Sun,Jia-Long Wen,Tong-Qi Yuan
Deep eutectic solvents (DES) pretreatment is a promising approach to decrease “biomass recalcitrance” and boost the cellulose bioconversion as well as lignin valorization. In this study, a short-time DES pretreatment strategy was performed to enhance the production of high-yield fermentable sugars and tailored lignin nanoparticles (LNPs) from abaca. The glucose yield reached 92.4% under the optimal pretreatment condition (110 °C, 30 min), which was dramatically increased in comparison with that (9.5%) of control abaca. Simultaneously, nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC) techniques indicated that the removed and regenerated DES lignin fractions displayed depolymerized structures and have relatively low molecular weight with relatively homogeneous morphology and narrow size distribution. Transmission electron microscope (TEM) analysis indicated that these lignin fractions are LNPs and the size of the optimal LNPs fraction is ranged from 30 nm to 50 nm. Moreover, all the DES lignin exhibited excellent antioxidant activities as compared to the commercial antioxidant butylated hydroxytoluene (BHT), which can be used as a promising natural antioxidant in industry. In short, this study demonstrated that the short-time DES pretreatment will improve the enzymatic digestibility and facilitate the controllable production and valorization of LNPs from abaca biomass, which will further promote the economic and overall benefits of biorefinery.
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BIOMACROMOLECULES
·
2021
·
IF 6.988
Huihui Xie,Hui Zhang,Xinxin Liu,Shenglong Tian,Yunsi Liu,Shiyu Fu
Lignin/tannin/ZnONP composite coatings were designed for paper-based green packaging. Multiple functions, such as high strength, moisture resistance, low air permeance, heat endurance, UV aging resistance, and antibacterial/mold properties, were successfully integrated into one biobased coating. Prepolymerization improved the physical properties of coatings at high lignin contents. The best ingredient ratio was: 40% lignin, 15% tannin, and 10% ZnONPs (based on tannin weight), and the as-prepared biocoating was labeled LTZn-10. After coated with LTZn-10, the tensile strength and bursting strength of the packaging were efficiently enhanced by more than 3 times and were dramatically increased by 51.6 and 5.6 times at the wet state, respectively, which reveals that the packaging has favorable moisture resistance and it can be used in high humidity environments. Scanning electron microscopy (SEM) proved that most of the pores on the paper were blocked by the coatings, which helped to decrease the air permeance by 10.3 times. Meanwhile, ZnONPs were evenly spread on the coatings, which endowed the packaging with excellent antibacterial/mold performance. No colony or mycelium was found in the test against Gram-negative/positive bacteria and eight common molds. Besides, antibacterial activity is only available while the bacteria come in contact with the coating and no active substances were released into the culture medium, which is a good property that can keep the cargo from contamination of antibacterial agents. In addition, the coated paper presented an improved Tg and thermal degradation temperature, indicating that the coated package has favorable thermostability and can maintain its outstanding physical properties in a wider temperature range. Lignin and tannin promoted the UV stability and service life of the coated paper, as a rare physical decrease was observed after UV aging for 72 h. The function-integrated biobased coating with favorable sustainability is a good candidate to be widely used in paper-based green packaging fields.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Shishuai Gao,Zenghui Cheng,Xi Zhou,Yupeng Liu,Jifu Wang,Chunpeng Wang,Fuxiang Chu,Feng Xu,Daihui Zhang
The preparation of dynamic networks from lignin with multipurpose and multifunctional practical applications is highly desirable but still challenging. In this study, the combination of a “grafting from” reversible addition-fragmentation chain transfer (RAFT) polymerization and dynamic chemistry was utilized to synthesize lignin based dynamic networks. Vanillin, a derived chemical from lignin, was used as a building block to realize the structural reorganization of lignin via RAFT polymerization, together with fatty acid derivative as the comonomer. NMR analysis confirmed the expected structures. It was demonstrated that the physicochemical properties of grafted lignin were adjustable depending on polymerization reaction conditions. Due to the presence of aldehyde groups from vanillin moiety, a dynamic network was produced by using diamines as crosslinkers. The mechanical properties were also tunable via controlling the structure of crosslinkers. The crosslinked lignin-based dynamic networks exhibited various interesting properties, such as recyclability and UV-adsorption ability. In addition, it could be used as self-healing, antifungal and conductive adhesives. The shear strength after first time self-healing could reach 2.9 MPa, which was 83.1% of the pristine adhesion. This damage and repair process could be carried out at least four times under relatively low temperature (80 °C) and pressure (1.0 MPa). More importantly, antifungal activity was observed for the self-healing adhesive, which might enlarge its applications. Additionally, after the addition of carbon nanotubes, the generated conductive adhesive was weldable without compromising its conductivity. This study has demonstrated the potential of lignin to synthesize high value-added materials, which could be appealing to both biorefinery and materials society.
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FUEL PROCESSING TECHNOLOGY
·
2022
·
IF 8.129
Mingyu Cui,Chong Liang,Wei Zhao,Xutang Liu,Linyang Dong,Dingkai Wang,Shuiyuan Fu,Zhijie Jiang,Fei Wang,Xianyong Wei
As the most abundant resource composed of aromatic groups in nature, lignin harbors significant potential for the production of bio-based fuels and chemicals. In recent years, solar-driven photocatalysis with its mild, low cost and environmental benign, has been employed for lignin depolymerization . Herein, we designed a Z -scheme CdS/H 5 PMo 10 V 2 O 40 /g-C 3 N 4 (CdS/HPA-2/CN) photocatalyst via hydrothermal method for the photocatalytic depolymerization of lignin. The prepared CdS/HPA-2/CN presents a nanoflower-like morphology with the average diameter of ∼600 nm. With the presence of electron-mediated HPA-2, CdS/HPA-2/CN exhibits the enhanced separation and transfer capacity of photogenerated charge carriers through Z -scheme mechanism. Result shows that the total yield ( Y ) of vanillin and vanillic acid from lignin depolymerization over optimized CdS/HPA-2/CN can reach to 32.7 mg/g lignin in DMF/formic acid ( v / v = 40/10) for 4 h. Reusability experiment of optimized CdS/HPA-2/CN displays that Y (26.5 mg/g lignin) can still reach to 81.0% of initial one after three cycles. Qualitative analysis of depolymerized products reveals that most components are aromatic compounds with the dominant products of vanillin and vanillic acid. Evidence also shows that photocatalysis promotes the reaction and small molecular products increased significantly after depolymerization. In addition, mechanism experiments and electron spin resonance tests exhibit that h + , ·O 2 − and ·OH took part in lignin depolymerization together and the effect sequence was ·O 2 − > ·OH > h + . In this work, as an electron mediator, HPA-2 provides the inspiration for construction of Z -scheme heterojunction , and CdS/HPA-2/CN exhibits enormous potential in lignin depolymerization by photocatalysis.
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FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Wei Zhang,Jiandong Shen,Pei Gao,Qixing Jiang,Wenshui Xia
Biodegradable chitosan films are highly desirable for use as food packaging, but the poor mechanical properties, water sensitivity, and functional limitations of these films must be addressed. In this study, a new chitosan film was prepared from chitosan–citric acid/chitosan–adipic acid (CA) and chitosan–malic acid/chitosan–adipic acid (MA) solutions and plasticized by the incorporation of a natural betaine-based deep eutectic solvent (DES; 0–30 wt%) and lignin (1 wt%). The resultant films were characterized by Fourier transform infrared spectroscopy , scanning electron microscopy, atomic force microscopy , and X-ray diffractometry to evaluate the changes in the structural, physical, antioxidant, and antimicrobial properties. Analysis revealed that the films contain numerous particles in cross-section and have rough surfaces. Furthermore, the addition of 30 wt% DES with lignin resulted in a significant increase in the elasticity, water contact angle, and radical scavenging rate. Moreover, the presence of lignin in the films reduced the water vapor permeability because of its hydrophobicity. Additionally, the CA film containing lignin displayed good antibacterial activity against Staphylococcus aureus and Escherichia coli . Overall, the CA-based composite films demonstrated excellent potential for use as bioactive food packaging application.
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BIOMASS & BIOENERGY
·
2025
·
IF 5.8
JiWen Fu,Hong Tian,ZiQi Tang,ZhangJun Huang,Lei Liu,Tan Gao,SiJin Chen,MingHao Lv
Since the extensive utilization of fossil fuels has led to a sharp increase in atmospheric CO 2 levels, controlling CO 2 emissions has garnered widespread attention. Carbon materials, as important CO 2 adsorbents, are often functionalized with heteroatoms such as N and B. However, the influence of B/N co-doping on CO 2 sorption remains unclear. In this study, a series of B/N co-doped lignin-derived carbons were synthesized via a one-pot pyrolysis using alkali lignin as the precursor and boric acid and glutamic acid as B and N dopants, respectively. The prepared samples were characterized using SEM, XPS, FTIR, and Raman spectroscopy. B/N co-doping enhanced the specific surface area, pore volume, and crystallinity of the carbon while introducing new surface functional groups such as BC 2 O and BCO 2 , without significantly altering the types or relative content of N-containing functional groups. The CO 2 adsorption capacity of B/N co-doped lignin-based carbon reached 1.72 mmol/g at 25 °C under 1 bar, which was 5.9 times higher than that of unmodified lignin-based carbon (0.25 mmol/g). Density functional theory (DFT) calculations revealed that B-containing functional groups enhanced the nucleophilicity of B and the electronegativity of surrounding atoms (especially O). N-containing functional groups, especially pyridinic-N (N-6) and pyrrolic-N (N-5), which have high adsorption energies, could avoid excess B oxidation and provide Lewis base sites for CO 2 sorption.
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高影响因子
FUEL
·
2025
·
IF 7.5
Shiyun Xiao,Yuchen Wu,Xue Luo,Tianrun Hu,Zeyu Deng,Shaoyuan Guo,Hualan Zhou,Shengkang Wang,Xuesong Wang
The development of highly active catalysts and catalytic systems is crucial for the efficient valorization of lignin biomass. In this paper, a defective CoNi bimetallic MOF-303 catalyst was synthesized by adjusting the thermal reduction temperature and bimetallic ratio, demonstrating efficient catalytic performance in the aqueous-phase hydrodeoxygenation (HDO) of vanillin to produce 2-methoxy-4-methylphenol (MMP). Under mild conditions (200 °C, 2 h, 0.5 MPa H 2 ), the Co 2 Ni 1 /M 460 catalyst achieves complete conversion of vanillin with an MMP yield of 90.42 %. Additionally, the catalyst exhibited high activity in the aqueous-phase HDO of lignin and other lignin-derived/model compounds. Remarkably, facilitated the depolymerization of lignin into low-molecular-weight aromatic compounds, predominantly MMP, via secondary catalysis (8 h). Characterization analyses revealed that the high activity of Co 2 Ni 1 /M 460 stems not only from its defect-induced large pores, which enhance substrate adsorption and active site availability, but also from the synergistic effects between the CoNi alloy and the MOF-303 framework (Co-N interaction), promoting C=O group activation and efficient HDO. This work presents a viable strategy for designing sustainable and efficient lignin catalytic systems, highlighting the promising catalytic potential of MOF-303.
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