MOLECULES
·
2022
·Vol. 27
·期 22
·7955
·
IF 4.927
Hongzhi Ma,Penglu Fu,Jihua Zhao,Xingxing Lin,Wenyu Wu,Ziqiang Yu,Changlei Xia,Qunhui Wang,Ming Gao,Jun Zhou
In order to increase the fractionation efficiency of the wheat straw, a deep eutectic solvent (DES) system consisting of chlorine/lactic acid was used in this study for wheat straw pretreatment. The outcomes exhibited that DES pretreatment significantly enhanced the capability to extract lignin, retain cellulose, and remove hemicellulose. The best condition for the pretreatment of wheat straw was 150 °C for 6 h. The process retained most cellulose in the pretreated biomass (49.94–73.60%), and the enzymatic digestibility of the pretreatment residue reached 89.98%. Further characterization of lignin showed that the high yield (81.54%) and the high purity (91.33%) resulted from the ether bond cleavage in lignin and the connection between hemicellulose and lignin. As for application, the enzymatic hydrolysis of the best condition reached 89.98%, and the lignin also had suitable stability. The investigation exhibited that DES pretreatment has the potential to realize an efficient fractionation of lignocellulosic biomass into high-applicability cellulose and lignin of high-quality.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Haifeng Jiang,Haipeng Liu,Baolin Liu,Yu Zhang,Shu Li,Jie Chen
This work studied the effect of cellulose–lignin interactions under potassium formate (HCOOK) and nickel formate (Ni(HCOO)2) on behavior and product distributions. The results indicated that the presence of HCOOK affected the whole thermal decomposition process, while the effect of Ni(HCOO)2 was mainly manifested before 339 °C. The interaction under the action of HCOOK favored the generation of carbonyl compounds, and the catalytic pyrolysis with Ni(HCOO)2 was better for formating phenols. The high peak intensities of CO and CH4 were achieved by adding nickel formate and potassium formate, respectively. It was obviously different from noncatalytic pyrolysis. The evolution of a char structure further revealed that different formate salts had different effects on the interactions. The statistical method according to the distribution of the liquid component confirmed that HCOOK had the strongest effect for reducing the cellulose–lignin interactions.
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高影响因子
ACS Omega
·
2019
·
IF 2.584
Qian He,Pucha Zhou,Jian Hao,Chunxiang Lu,Yaodong Liu
In this study, we systematically investigated the phase separation behaviors of polyacrylonitrile (PAN)/alkali lignin (AL)/dimethyl sulfoxide (DMSO) systems and found that the addition of AL causes phase separation and the systems form sea (PAN)/island (AL) types of structures. Interestingly, the AL-rich domains are very stable even after a long time of storage up to 15 days. Additionally, how the phase separation affected the solution rheology, the coagulation process and PAN cyclization were explored. The addition of AL in PAN/DMSO solutions changes the solution viscosity and gelation behaviors. Also, the existence of AL-rich domains accelerates the coagulation rate of the PAN solution in water. Because AL degrades at a lower temperature than PAN, it reduces the PAN cyclization temperature but leads to a higher cyclization activation energy, which could be caused by their different initiation mechanisms. These results would be useful to understand how the addition of AL affects the PAN solution structures, solution rheology, solution coagulation behaviors, and PAN stabilization reactions.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 23
·14863
·
IF 6.208
Huiyang Bian,Xuan Shu,Wenhao Su,Dan Luo,Maolin Dong,Xiuyu Liu,Xingxiang Ji,Hongqi Dai
The exploration of functional films using sustainable cellulose-based materials to replace plastics has been of much interest. In this work, two kinds of lignin nanoparticles (LNPs) were mixed with cellulose nanofibrils (CNFs) for the fabrication of composite films with biodegradable, flexible and ultraviolet blocking performances. LNPs isolated fromp-toluenesulfonic acid hydrolysis was easily recondensed and deposited on the surface of composite film, resulting in a more uneven surface; however, the composite film consisting of CNFs and LNPs isolated from maleic acid hydrolysis exhibited a homogeneous surface. Compared to pure CNF film, the composite CNF/LNP films exhibited higher physical properties (tensile strength of 164 MPa and Young’s modulus of 8.0 GPa), a higher maximal weight loss temperature of 310 °C, and a perfect UVB blocking performance of 95.2%. Meanwhile, the composite film had a lower environmental impact as it could be rapidly biodegraded in soil and manmade seawater. Overall, our results open new avenues for the utilization of lignin nanoparticles in biopolymer composites to produce functional and biodegradable film as a promising alternative to petrochemical plastics.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Xinyu Lu,Han Que,Xiaoli Gu
Sodium lignin sulfonate (SLS) containing α -cellulose film with high compatibility was fabricated via crosslinking process using water as green solvent. FTIR analysis showed that intramolecular/intermolecular hydrogen bonds were formed after water treatment. In addition, physicochemical and antibacterial properties were analyzed comprehensively and results presented that the crosslinked film showed stronger tensile strength, higher water and heat resistance as compared to the pure sample. Better UV blocking capacity and antibacterial performance were derived from the addition of SLS . After water treatment, antibacterial performance was deteriorated with the consumption of sulfonate groups to form intermolecular hydrogen bonds.
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高影响因子
Smart Materials and Structures
·
2023
·Vol. 32
·期 3
·035037
·
IF 4.1
Ying Chen,Peipei Kuang,Xiaochen Shen,Xiaowei Lv,Yushu Wang,Weihan Yin,Tongqing Zou,Ben Wang,Yupeng Liu,Quli Fan
An operative and straightforward precipitation-driven approach was reported to fabricate an anisotropic hydrogel actuator with temperature response. Through in situ deposition of lignin nanoparticles (LNP) in the process of polyacrylamide (PAM) polymerization with the presence of hydroxypropyl cellulose (HPC), an inhomogeneous hydrogel network (PAM/HPC/lignin hydrogel, PHL hydrogel) with distinct gradient porous structure was achieved that could be tailored to form a hydrogel actuator. The PHL hydrogels exhibit faster shape deformation as responding to temperature and higher mechanical properties caused by introducing the LNP and HPC chains. The deformation direction and rate of the hydrogel actuator could be influenced by the lignin content, temperature, and as well as their shape. The maximum bending angle could reach near 360° with 60 s as it was exposed to 60 °C. Due to the excellent bending behavior of the PHL hydrogel, the potential applications as grippers and valves were studied, and the results showed its sensitive response to temperature, suggesting its potential application as an intelligent actuator in the future.
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ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Cheng Cai,Xuejuan Zhan,Hongming Lou,Qi Li,Yuxia Pang,Yong Qian,Haifeng Zhou,Xueqing Qiu
Enzymatic conversion of lignocelluloses into fermentable sugars is a key step in producing liquid fuels and chemicals in an ecofriendly and sustainable manner. However, because of the large quantities of cellulase required in enzymatic hydrolysis, the high cellulase cost make the production cost of glucose still high. To reduce the overall production cost and achieve the comprehensive utilization of lignocelluloses. A new intensive production process for enzymatic saccharification was developed: lignin, the residue of lignocellulosic substrates after enzymatic hydrolysis, was modified to a pH-responsive carrier (pH-LC) by simple graft reactions and used to recycle cellulase through electrostatic interaction. pH-LC exhibited reversible soluble–insoluble property as solution pH changed, and it did not inhibit cellulase activity. By simply adjusting the pH of the solution contained pH-LC and cellulase, cellulase could be precipitated or dissolved for recycling. pH-LC could recover more than 90% of filter paper activity in solution for cellulase CTec2. During the enzymatic hydrolysis of corncob residue, pH-LC could not only recover more than 50% of cellulase but also increase the yield of glucose from 78.1% to 93.0%. This new process is not only green and convenient but also well integrated with existing processes and easily applied.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Xiaoyu Gong,Tanglong Liu,Shanshan Yu,Yi Meng,Jie Lu,Yi Cheng,Haisong Wang
It is significant to develop low cost, environmental friendly and renewable bio-based adhesives without formaldehyde. In this paper, acetonitrile extracting lignin (AEL) was used as raw material, modified by phenol and mixed with aqueous of polyvinylpyrrolidone (K30), a biocompatible agent, to prepare a high-performance formaldehyde-free lignin-based adhesive. The results of the experiments showed the optimal condition as follows: the mole ratio of lignin to phenol 1:2, the reaction temperature 80 ℃, the reaction time 3 h, the concentration of K30 10%, mole ratio of PAEL to K30 1:0.4, the shear strength of the adhesive reach up to 1.70 MPa (Technical lignin-based adhesive only 0.11 MPa), and it was still as high as 1.02 MPa after soaking in water for 24 h. Compared with the adhesive (1.12 MPa) on the market, the as-prepared sample shows a much higher shear strength, meeting the National Primary Standard of plywood (≥1.0 MPa) and according with national standard.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Baorui Liu,Xinyu Shao,Zhe Kang,Hongqing Cheng,Dongying Hu
TiO 2 , as the mainstream of dye-sensitized photoanode, can provide two quantities of state density higher than ZnO. However, van der Waals forces between TiO 2 microcrystals make them more inclined to agglomerate, posing a major obstacle of poor dispersion and homogeneity. Since the charge kinetics of TiO 2 depends on reasonable microstructure arrangement, this study proposes an innovative strategy of sustainable lignin-driven homogenization of microarchitecture in TiO 2 . Herein, the uniform dispersion of TiO 2 microcrystals is successfully induced by alkali lignin (AL) with the reduced grain size of 42–18 nm, and the increased specific surface area of 879.55 m 2 /g. Moreover, AL does not change the anatase structure of TiO 2 . Notably, this micro-homogenized structure of more layered arrangement and active adsorption sites shortens the carrier/electron transport path, achieving high dye loading of 246 nM/cm 2 and photo-conversion efficiency (PCE) of 8.83 %, which exceeds the reported TiO 2 -based dye-sensitized solar cells. Moreover, AL substantially increases the J SC from 18.15 mA/cm 2 to 25.63 mA/cm 2 . Specially, molecular interaction between AL and TiO 2 further supports high PCE of >90 % after 240 h, with good stability. Consequently, this innovative strategy of lignin-driven micro-homogenization in TiO 2 serves as an inspiration for the development of biomass-enhanced TiO 2 -based photoelectric devices.
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Zhanshi Ni,Haobo Bi,Hao Shi,Xiang Liu,Junjian Tian,Yurou Yao,Liqun He,Kesheng Meng,Qizhao Lin
The escalating total amount of industrial solid waste is increasingly taxing the ecological environment. Co-combustion technology is seen as a potential solution to this problem. This study investigated the interaction mechanism and carbon dioxide emissions during the co-combustion process of coal slime and biomass (lignin) using a programmed heating method. The experimental results reveal that the two sub-reaction models effectively depict the combustion process of coal slime. In the co-combustion process, the comprehensive combustion and ignition performance of the mixed fuels surpasses that of coal slime, but the stability of the combustion flame is reduced. The combustion performance of the mixed fuel is primarily influenced by two common factors. The interaction between lignin and coal slime significantly changes with the variation of mixing ratio and heating rate . The main product in the combustion process of mixed fuels is carbon dioxide. Due to the competition for oxygen among volatile matter, the emission of carbon dioxide is lower than the theoretical value. When the mass percentage of lignin is 70 %, the impact on carbon dioxide is most pronounced. The experimental results of this study provide a foundation for understanding the interaction mechanism of coal slime and biomass co-combustion. The research findings also provide theoretical guidance for the safe operation of coal slime and biomass co-combustion equipment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jinsong Wang,Huining Xiao,Haijiao Xie,Yang Huang,Farzad Seidi
Green self-healing coatings, particularly lignin-based coatings, represent a breakthrough solution for sustainable metal protection and serve as a promising alternative to traditional petroleum-derived coatings. However, the practical application of pure lignin coatings is limited by their inherent structural rigidity and low hydrophobicity. To address these challenges, a series of lignin-based hydrophobic self-healing coatings were developed by functionalizing lignin with methacrylate groups, conjugating it with corrosion inhibitors, and subsequently polymerizing it with bis(2-methylacrylyl) oxyethyldisulfide (BMOD) and hydrophobic monomers. Through a systematic optimization, we achieved a contact angle of 115° and an E corr of -20 mV for a coating with thickness ~ 19 μm. Notably, this coating reduces the corrosion rate (CR) by over 6000 times compared to bare steel. Additionally, the coating is able to restore its microcracks under mild conditions through a combination of the gradual release of corrosion inhibitors and reversible disulfide bonds, achieving a healing efficiency of 83.3 % within 72 h. The combination of excellent hydrophobicity, self-healing capability, and corrosion resistance represents a significant advancement in environmentally friendly, durable coatings with extensive industrial applications.
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产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2022
·
IF 6.978
Xuhai Zhu,Cong Zhang,Haixia Ma,Fang Lu
The hydrogen bond (H-bond) is essential to stabilizing the three-dimensional biological structure such as protein, cellulose, and lignin, which are integral parts of animal and plant cells; thus, stereo-recognition of the H-bond is extremely attractive. Herein, a methodology combining the variable-temperature 1H NMR technique with the density functional theory was established to recognize the underlying H-bonding patterns in lignin diastereomers. This method successfully classified the intramolecular and intermolecular H-bonds with slope values varying between 50.2–201.5 and 221.9–655.4, respectively, from the natural logarithm of the hydroxyl proton chemical shift versus the inverse of the temperature plot. Moreover, this slope was found to be correlated with the interaction distance between the H-bond donor and acceptor. Finally, it was proposed that the stereo-preferential formation of the β-O-4 structure (erythro vs threo form) during lignin biomimetic synthesis was probably influenced by their intramolecular H-bonding patterns, thus making it easier to reach thermodynamic equilibrium.
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PubMed
高影响因子
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