INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Yin Yan,Changliu He,Lihe Zhang,Huifeng Dong,Xu Zhang
In this paper, ternary DES (choline chloride, glycerol, Lewis acid) was used to pretreat lignocellulose, and the DES solution with dissolved lignin was utilized as the medium of hydrogel to prepare DES-based polyacrylic acid/polyvinyl alcohol (PAA/PVA) double network hydrogels with great mechanical properties, self-adhesion, and high electrochemical sensitivity. The entanglement of PAA with PVA chains, the covalent linkage between Al 3+ and PAA chains and the metal phenol network (MPN) formed by Al 3+ and lignin improved the mechanical properties of the hydrogels, enabling the prepared hydrogels to achieve a tensile strain of 400 % and an elongation at break of 150 kPa. Secondly, the introduction of DES solution endowed the hydrogel with excellent electrical sensing ability and anti-freezing property, so that the hydrogel still maintains good flexibility and ionic conductivity at −20 °C. It was also found that the above hydrogel can achieve a high gauge factor of 4.19 as a flexible sensor, which provides scientific ideas for the application of the pretreated DES solution in the field of flexible wearable.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Yixin Sun,Peishan Li,Qi Sun,Xin Liu,Yanping Wang,Bixian Zhang,Shijia Dong,Xiaomei Hu
Ionic liquids (ILs)-assisted microbes and enzymes are potential approaches for converting lignocellulosic biomass into fermentable sugars in a biorefinery. In the present study, an ILs-tolerant strain Aspergillus terreus NEAU-7 with ILs-stable cellulase production ability was isolated and identified. A comparative transcriptome analysis revealed that A. terreus NEAU-7 could promote ion transport and acquire metabolic energy to reduce the adverse effect of ILs. The results further confirmed that the strain could increase the accumulation of compatible solutes to offset the osmotic pressure of ILs and reduce the cell membrane permeability to prevent ILs. A secretome analysis of Carbohydrate-Active Enzymes (CAZymes) showed no significant reduction in the Glycoside Hydrolases (GH) families of cellulolytic enzymes, while a significant reduction was observed for Carbohydrate Esterases (CE) families and Glycoside Hydrolase 43 (encoding α- L -arabinofuranosidases and β-xylosidases), indicating that the presence of ILs could decrease the expression of hemicellulolytic enzymes. Herein, a model for lignocellulose degradation of A. terreus NEAU-7 was interpreted. Overall, this study will provide insights into further exploration of the ILs-resistance mechanism of lignocellulolytic fungi and employment of ILs-assisted fungi in the degradation of lignocellulosic biomass into value-added products.
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ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Lili Zhang,Hailong Lu,Jingjing Chu,Jinxia Ma,Yimin Fan,Zhiguo Wang,Yonghao Ni
Inspired by its unique porous structure, high value-added functional hydrogels combined with metal nanoparticles can lead to applications in different areas, including environmental catalysis. For this purpose, controlling the metal nanoparticle size is paramount. Herein, the porous lignocellulose hydrogel (LCG) with different lignin contents served as the matrix for in situ-synthesizing silver–lignin nanoparticles (Ag-L NPs), with lignin in the LCG as the reducing and capping agent of Ag-L NPs and the lignin content to control the size of Ag-L NPs. The well-dispersed lignin in the LCG network ensures immobilization and dispersion of Ag-L NPs. The particle size of Ag-L NPs is tailored by adjusting the lignin content (0.5, 6.5, 11.6, and 18.4%) of the LCG: the higher the lignin content, the smaller the Ag-L NPs. The smallest Ag-L NPs obtained were of 9.5 nm. The as-prepared Ag-L NPs/LCG composite samples showed outstanding catalytic reduction capability, with superior stability/reusability when applied for the catalytic reduction of 4-nitrophenol. Moreover, the Ag-L NPs/LCG composites exhibited high antibacterial activity, thus contributing to long-term storage stability.
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BIORESOURCE TECHNOLOGY
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2023
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IF 11.4
Xing Yan,Ming-Jun Zhu
Microbial fuel cell (MFC) with lignocellulose as an electron donor is considered a sustainable biorefinery. However, low lignocellulose degradation and energy output restrict the scale of application. Herein, the extracellular electron transfer (EET) capacity of Acetivibrio thermocellus DSM 1313 with lignocellulose as substrate was shown to be mediated by the self-produced flavin, and its intracellular electron transfer went through the whole respiratory chain. Thermophilic MFC with resazurin exhibited an increase in the open circuit voltage by 37.78%, and a 2.60 folds increase in power density of 77.85 mW/m 2 , respectively. Differential pulse voltammetry and electrochemical impedance spectroscopy analysis indicated that resazurin decreased the solution and anode charge transfer resistance, and enhanced the extracellular electrochemical activity. Furthermore, resazurin resulted in a lower redox potential, allowing preferential electron transfer to resazurin rather than flavin. This research establishes a resazurin-mediated thermophilic MFC with lignocellulose as substrate, which provides novel idea on the biomass refinery.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2023
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IF 5.9
Min Zhou,Meiqi Lv,Sulin Cai,Xingjun Tian
DESs are promising green solvents in lignocellulose pretreatment . In this work, four choline chloride based DESs were synthesized and their physicochemical properties were evaluated. Herbaceous lignocellulose (wheat straw, sorghum straw) and woody lignocellulose biomass (poplar wood, pine wood) were selected as pretreated substrates. In order to reveal the mechanism that pretreatment can improve the efficiency of enzymatic hydrolysis , the pretreated lignocellulose and lignin were analyzed. SEM , FT-IR and XRD characterization revealed the microstructural changes of pretreated lignocellulose, including the increase of surface roughness and pore erosion, changes of polysaccharide/lignin chemical groups, the increase of CrI. The efficient delignification increased the accessibility of enzyme to cellulose , the lignin content negatively affected enzymatic hydrolysis conversion. Furthermore, GPC analysis showed that the polydispersity of sulfonated lignin was reduced after pretreatment, lignin had more homogeneous molecular structures. The degree of unsaturation was calculated according to the elemental composition of sorghum straw and lignin. The unsaturation of pretreated sorghum straw decreased, that may be due to the removal of partial lignin. The elemental composition of acid insoluble lignin (separated from sorghum straw) reflects the increase of unsaturation of lignin after pretreatment.
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Biotechnology for Biofuels
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2018
·Vol. 11
·期 1
·1-12
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IF 5.497
Wen Jingbai,Xiao Yanqiu,Liu Ting,Gao Qiuqiang,Bao Jie
Background Lignocellulose is one of the most promising alternative feedstocks for glutamic acid production as commodity building block chemical, but the efforts by the dominant industrial fermentation strain Corynebacterium glutamicum failed for accumulating glutamic acid using lignocellulose feedstock.Results We identified the existence of surprisingly high biotin concentration in corn stover hydrolysate as the determining factor for the failure of glutamic acid accumulation by Corynebacterium glutamicum. Under excessive biotin content, induction by penicillin resulted in 41.7 ± 0.1 g/L of glutamic acid with the yield of 0.50 g glutamic acid/g glucose. Our further investigation revealed that corn stover contained 353 ± 16 μg of biotin per kg dry solids, approximately one order of magnitude greater than the biotin in corn grain. Most of the biotin remained stable during the biorefining chain and the rich biotin content in corn stover hydrolysate almost completely blocked the glutamic acid accumulation. This rich biotin existence was found to be a common phenomenon in the wide range of lignocellulose biomass and this may be the key reason why the previous studies failed in cellulosic glutamic acid fermentation from lignocellulose biomass. The extended recording of the complete members of all eight vitamin B compounds in lignocellulose biomass further reveals that the major vitamin B members were also under the high concentration levels even after harsh pretreatment.Conclusion sThe high content of biotin in wide range of lignocellulose biomass feedstocks and the corresponding hydrolysates was discovered and it was found to be the key factor in determining the cellulosic glutamic acid accumulation. The highly reserved biotin and the high content of their other vitamin B compounds in biorefining process might act as the potential nutrients to biorefining fermentations. This study creates a new insight that lignocellulose biorefining not only generates inhibitors, but also keeps nutrients for cellulosic fermentations.
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ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Xiaomeng Yang,Fei Geng,Zhengzeng Yang,Armin Rezayan,Chunbao Charles Xu,Dan Wu,Yongsheng Zhang
Reductive catalytic fractionation (RCF) is a promising lignin-first strategy to produce valuable phenolics from lignocellulosic biomass. However, this method encounters the challenges of a low yield of phenolic monomers and the use of expensive noble metal catalysts. In this study, a reduced NiAl layered double oxide (NiAl-LDO) catalyst is reported for the RCF of lignocellulosic biomass with high depolymerization efficiency and phenolic monomer yields. The RCF reaction of pine at 260 °C yielded 27.49 wt % of lignin oil and 21.62 wt % of phenolic monomers, with a delignification degree of 92.62%. In addition, high-performance liquid chromatography analysis showed that the solid carbohydrate pulp fraction retained up to 80.63% cellulose, which can be used as an economical feedstock for the production of other platform chemicals. Further characterization and mechanistic studies including NH3-TPD, Py-FTIR, and 2D HSQC NMR revealed that the strong acidic sites derived from Ni2+ at the metal–support interface play a crucial role in promoting the hydrogenolysis of aryl ether bonds within lignin, thereby significantly improving the yield of phenolic compounds. Understanding the role of the NiAl-LDO catalyst acidity in the RCF reaction is beneficial for the production of phenolic products from biomass based on a lignin-first strategy.
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INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Fajian Zeng,Gege Cheng,Xing Zhou,Liangyi Yao,Qin Huang,Yan Jiang,Xiuyu Liu
Composite aerogels (CPA) constructed based on lignocellulose nanofibers (LCNF) with anisotropic and honeycomb-like three-dimensional network structures are excellent adsorbent materials. LCNF, as a core constituent of CPA, combines the advantages of cellulose nanofibers and lignin, which endows excellent adsorbent properties to the aerogels and shows great potential in the adsorption of aromatic pollutant diclofenac sodium (DS). Herein, a deep eutectic solvent (DES) and high-pressure homogenization strategy was employed to prepare cationized lignocellulose nanofibers (CLCNF) from industrial and agricultural waste bagasse, and cationized lignocellulose-based composite aerogels were prepared with polyvinyl alcohol (PVA) as crosslinking agent combined with directional freezing technique to efficiently remove DS from water bodies. The prepared CPA had a uniformly distributed honeycomb-like pore structure (porosity ≈ 98 %) and excellent mechanical properties (compressive strength up to 183.93 KPa). In addition, the CPA had a rapid adsorption response to DS with a theoretical maximum adsorption capacity of up to 298.51 mg/g. Its adsorption behavior was in accordance with the pseudo-second order kinetic and Langmuir isotherm model, which demonstrated that it was dominated via the monolayer chemical adsorption, and the main mechanism of the adsorption were electrostatic interactions and intermolecular interactions. Importantly, the CPA still had good stability and reusability after four cycles of use. Therefore, the CPA prepared in this study can be used as a desirable adsorbent for water remediation to achieve the effect of "treating pollution with waste".
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Shan Cao,Zhiqiang Chen,Ziyue Tang,Yingquan Chen,Mingwei Xia,Haiping Yang,Wei Chen,Xu Chen,Hanping Chen
Potassium-assisted biomass pyrolysis is highly efficient for product poly-generation and upgrading. In this study, kinetics modeling of over-saturated potassium (K 2 CO 3 )-assisted lignocellulose pyrolysis process was carried out by using the modified Friedman-based master plot (MF-MP) method combined with multiple-parallel compensation-simplified distributed activation energy model (CS-DAEM). The effects of K 2 CO 3 dosage on the lignocellulose pyrolysis process were also studied. MF-MP results show that all the K 2 CO 3 -assisted pyrolysis processes of cellulose, xylan, and lignin obey the Avrami-Erofeev (Am) nucleation mechanism, where potassium slightly decreases the activation energies. The potassium-assisted pyrolysis process of typical lignocellulose (bamboo) also obeys the Am mechanism, and 3G-Am-CS-DAEM modeling of the processes achieves R 2 > 0.999. By fixing the pre-exponential factor, the compensation effect was simplified. Based on modeling results, the activation energy decreases as potassium dosage increases from 0.01 mmol/g to 10 mmol/g. This study provides an effective kinetics approach to characterize the potassium-assisted biomass pyrolysis process.
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CELLULOSE
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2025
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IF 4.8
Zhang Yutian,Zeng Dongdong,Li Jianing,Ma Xiaojun,Li Dongna,Li Yachao
Co-substrate fermentation has become an essential approach to achieving high-efficiency and low-cost production of poly (β- l -malic acid) (PMA). Herein, sustainable rubberwood ( Hevea brasiliensis ) hydrolysate (RWH) was co-fermented by A. pullulans to synthesize PMA using glucose and xylose as co-substrate carbon sources. Moreover, vitamin B was explored as nutrient supplementation in this study. Results showed that compared with the single RWH substrate, the PMA production of co-substrate fermentation increased by 38–52%. Furthermore, the addition of VB 6 promoted the utilization of substrates and shortened the fermentation cycle of PMA. During the scale-up fermentation, the PMA yield reached 0.50–0.54 g/g. Compared with traditional glucose culture medium, co-substrate fermentation improved the conversion rate of carbon sources and reduced PMA production cost by 14.9–36.6%. This work provides a new path for high-efficiency and economical industrial fermentation technology of PMA.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2021
·Vol. 38
·期 4
·788-796
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IF 3.309
Jiang Yetao,Wang Xiaoyu,Wu Zhen,Xu Jiaxing,Hu Lei,Lin Lu
Cooking with active oxygen and solid alkali (CAOSA) is a mild and environmentally friendly method for separation of lignin components. The degradation mechanism of hemicellulose associated with this method has been investigated. It was found that the hemicellulose-derived polysaccharides were directly oxidized rather than hydrolyzed to monosaccharides for degradation. To avoid the undesirable degradation of hemicellulose components by CAOSA, the idea of separating hemicellulose first in the form of xylan to produce xylooligosaccharide was presented by this study. Although hydrothermal autocatalysis has been commonly used in hemicellulose separation, the effects of acid-enhanced hydrothermal method and alkali-suppressed hydrothermal method on hydrothermal autocatalysis were systematically compared for the first time, and it was found that the acid-enhanced method was beneficial for highly selective extraction of xylan. Then, the hemicellulose-removed bamboo was treated with CAOSA process to separate lignin from cellulose. It was found that solid alkali dosage of CAOSA could be evidently decreased for hemicellulose-removed bamboo, which was helpful to reduce the cost of CAOSA. Coupling hemicellulose pre-extraction and CAOSA lignin fractionation strategy, a comprehensive biorefinery case for bamboo biomass could be anticipated.
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Functional Materials Letters
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2024
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IF 1.2
Chao Zou,Yun Huang,Xingquan Wei,Amin Song,Wenhao Ren,Saisai Li,Junyuan Gan,Xing Li,Mingshan Wang,Yuanhua Lin
Gel polymer electrolyte (GPE) based on polymer matrix of lignocellulose and gelatinized potato starch is prepared, and elemental sulfur is introduced as an additive for the first time. The polymer matrix has shown excellent performances including liquid electrolyte uptake, tensile strength and thermal stability. The ionic conductivity and electrochemical stability window of the corresponding GPE are improved with the introduction of the elemental sulfur. Furthermore, the addition of elemental sulfur can be reduced into short-chain Li 2 S and Li 2 S 2 on the surface of lithium anode to further elevate the capacity of battery. Meanwhile, the short-chain Li 2 S and Li 2 S 2 in the solid electrolyte interphase (SEI) film on the surface of lithium metal can improve SEI’s mechanical properties and the interface compatibility between GPE and lithium metal. The multi-component synergistic effect of GPE provides the battery with superior cycle stability and excellent electrochemical performances. Bio-based GPE will exhibit a promising and alternative way for the practical application of lithium–sulfur batteries.
研究领域:
材料科学
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电化学
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储能技术
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高分子科学
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纳米技术
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