CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Mengyue Wang,Wentao Dong,Xi Lu,Qin Yang,Bin Yan
In this work, we developed a high-performance two-component epoxy adhesive from two biobased triple-functional and hexa-functional epoxy monomer from lignin-derived monomer eugenol, and a cellulose-derived furfuryl diamine for metal substrates. Through a tight cross-linked network and rich electronegative structure, the adhesives showed excellent adhesive performance to various metal substrates, especially for Fe. It demonstrated a high lap shear strength up to 19.8 MPa to Fe substrate, surpassing most reported epoxy adhesives. Moreover, these adhesives exhibited excellent long-term adhesion properties in high-temperature and acidic/base aqueous environments. It can maintain more than 95% of the adhesive strength to Fe substrate after soaking in different acid-base environments for 7 days, and achieved a maximum adhesion strength of 16.46 MPa to Fe substrates at 200 °C only 14.2% decrease when compared to that at room temperature. Molecular simulations revealed that these two adhesives could rapidly achieve dynamic equilibrium with Fe (110) surface in 15 and 22 ps which was much shorter than that to Cu and Al, suggesting a stronger binding energy between these adhesive and Fe surfaces and was consistent with the adhesion performance. This work widens the way for high-performance bio-based epoxy adhesives to be used in more demanding environments.
研究领域:
材料科学
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生物化学
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Jianing Xu,Yi Hu,Meng Liu,Zhihan Tong,Yilin Li,Yuhan Lou,Qi Tang,Jiale Li,Shuo Dou,Yongzhuang Liu,Orlando J. Rojas,Haipeng Yu
The development of catalysts that are both highly active and structurally stable is critical for addressing the inherent challenges posed by the recalcitrance of lignocellulose, which arises from the complex interconnections and varied chemical properties of lignocellulosic feedstocks. Consequently, there is a pressing need for efficient biorefinery strategies that facilitate the hierarchical separation of these components and their subsequent conversion to valuable chemicals. In this article, we introduce a two-step catalytic process that employs a spinel high-entropy oxide (HEO). This HEO benefits from a “cocktail effect”, wherein its high entropy confers numerous intrinsic oxygen vacancies, enhancing its oxygen adsorption and activation capabilities for oxidation catalysis. This approach allows for the efficient refinement of lignocellulose into fine chemicals and exhibits an enhanced performance under mild reaction conditions. The robustness and stability of HEO enable them to sustain a high catalytic activity and effectiveness through multiple catalytic cycles. Finally, we have successfully fractionated lignin into aromatic monomers with a yield of 42 wt % and achieved an impressive total carboxylic acid yield of 150 wt % relative to the original hemicellulose content. Additionally, the cellulose solid fraction, preserved during the HEO treatment, yielded 98.93 wt % glucose when chemically saccharified using a solvent mixture of zinc chloride and formic acid. This strategy represents a significant advance in biomass upgrading, demonstrating markedly higher chemical efficiency in comparison to previously reported methodologies.
研究领域:
催化
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生物质转化
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材料科学
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化学工程
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 4
·878
·
IF 4.6
Ruijia Hu,Weihao Li,Xi Zhou,Shunmin Yi,Xingfu Zheng,Qiufeng Mo,Wanyu Liu
A novel lignocellulose-based poly(butylene 3-propyladipate-co-furanoate) (PBApF) was synthesized from lignocellulose-derived 3-propyladipic acid (3PAA), 1,4-butanediol (BDO), and 2,5-furandicarboxylic acid (FDCA). The copolyesters were characterized by1H NMR, GPC, DSC, TGA, XRD, DMA, rotational rheology, tensile tests, and enzymatic degradation tests. They were random copolymers whose composition was well controlled, and the number-average sequence lengths of the copolyesters were around 1.35–4.33. By combining the results of tensile tests and DMA, the elongation at break of PBApF45(1865%) had a much greater value than that of PBAF45(1250%), i.e., the branching incorporated into the linear polymer increased the melt strength and conferred tension-hardening properties, which helped to enhance the elongation of the polymer. In addition, the influences of 3PAA content on enzymatic degradation were studied in terms of weight loss; when the content of 3PAA was 55 mol%, the copolyesters exhibited good biodegradability. Thus, depending on their composition, PBApFSmight find end applications as biodegradable elastomers or impact modifiers for other polymers.
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMASS & BIOENERGY
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2024
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IF 5.8
Linhua Song,Yushan Jiang,Zhengzheng Zhang,Yuqing Ouyang
Hydrogen-supplied liquefaction technology is considered to be one of the most essential thermal treatment strategies for improving the quality of bio-oil. This study employed wood chips as feedstock, inert alkanes as dispersing solvent, and tetraline as hydrogen donor. The yields of bio-oil rose substantially from 45.2% to 69.2% and 68.3% with CaO and 8% NiO/γ-Al 2 O 3 catalysts, respectively, at 310 °C for 30 min with a ratio of wood chips to n -heptane of 1:8 g ml −1 . The reaction mechanism was examined using microcrystalline cellulose and lignin as model compounds. Tetralin offered the active hydrogen, while the strong alkalinity of CaO brought about high-temperature fragmentation of cellulose to produce small-molecule ethers, aldehydes, and ketones. These species would eventually transform into alcohols through engaging with the active hydrogen. The introduction of NiO/γ-Al 2 O 3 promoted the ring-forming reaction of cellulose-derived fragments, resulting in an increase of furan content (up to 29.97%). This phenomenon suggested that the varied catalysts exerted a remarkable impact on the hydrogen-supplied liquefaction of cellulose. The catalytic effect on lignin was evident in the breakage of the C–O bond in the side chain of phenol, leading to the generation of an impressive amount of phenolics. In light of changes in the generated products and calculation of the theoretical bond energies, the bond-breaking approaches and potential reaction pathways of biomass impacted by different catalysts were proposed, providing a theoretical foundation for the development and application of biomass energy.
研究领域:
能源植物学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2020
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IF 5.448
Xiaoyun Li,Xuebin Lu,Min Liang,Rui Xu,Zhihao Yu,Bingyu Duan,Lefu Lu,Chuanling Si
Catalytic conversion of xylose and the hemicellulose fraction of waste biomass to furfural is important for the valorization of waste lignocellulose. Here, a clean and efficient catalytic system consisting of sulfonated carbon microspheres catalysts and γ-valerolactone was developed for the upgrading of xylose and waste lignocellulose to the furfural in one-pot. Sulfonated carbon microspheres (C Co S) with Brønsted and Lewis acid sites were prepared to yield furfural. The mesoporous structures were facilitated by introduction of Co element in xylose hydrothermal process, and the density of Brønsted acid sites were improved by the sulfonation. The furfural yield from xylose reached 75.12% using C Co S as catalyst at 170 °C for 30 min in a γ-valerolactone/water (17/3 v/v) solvent. As typical Brønsted acid, the SO 3 H groups on the surface of C Co S catalyst is essential for catalytic dehydration xylose to furfural. Additionally, the mesoporous structures of C Co S improved the mass transfer in the furfural production process. The catalytic system was applied in the conversion of real biomass (including corncob, corn straw and Eucalyptus sawdust) to evaluate the possibility of application. These three biomass species all reached excellent furfural yields, which were more than 70%. This work provided a catalytic strategy for effective conversion of xylose and biomass to furfural.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 7
·4167-4177
·
IF 3.809
Dang Baokang,Chen Yipeng,Yang Ning,Jin Chunde,Sun Qingfeng
Abstract Functionalized lignocellulose (LC) wrapped with aluminosilicate was fabricated via a facial mechanical grinding assisted hot-pressing method, which used for flame retardant composite. The aluminosilicate particles with an average size of 3 μm were distributed on the lignocellulose surface by hydrogen bonds and viscous polyacrylamide (PAM). The as-prepared aluminosilicate-PAM/lignocellulose (A-PAM/LC) composite exhibited the excellent flame-retardancy and mechanical properties. The thermal decomposition of A-PAM/LC composite delayed by 31 °C as the aluminosilicate was loaded. The heat release rate (HRR) and total heat release (THR) of A-PAM/LC composite was reduced by 20.6 and 41.1%, respectively. Meanwhile, the A-PAM/LC composite showed the maximum bending strength of 34.23 ± 1.52 MPa and increased by 67.3% compared to the PAM/LC composite. Graphical Abstract Aluminosilicate wrapped PAM/lignocellulose composite showed excellent flame-retardant and mechanical properties.
研究领域:
材料科学
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Yunhua Bai,Xiong-Fei Zhang,Mengjiao Yu,Jianfeng Yao
Deep eutectic solvents (DESs) hold great potential in biorefining because they can efficiently deconstruct the recalcitrant structure of lignocellulose . In particular, inorganic salts with Lewis acids have been proven to be effective at cleaving lignin–carbohydrate complexes. Herein, a Zr-based DES system composed of metal chloride hydrate (ZrOCl 2 ·8H 2 O) and ethylene glycol (EG) was designed and used for poplar powder pretreatment . Zr 4+ -based salts provide sufficient acidity for lignocellulose depolymerization . The acidity of the DES was analysed by the Kamlet-Taft solvatochromic parameter, and the results demonstrated that the acidity can be regulated by the DES composition. Under the optimum conditions (ZrOCl 2 ·8H 2 O:EG molar ratio of 1:2), the DES pretreatment removes nearly 100 % hemicellulose and 94.7 % lignin. The recovered lignin exhibited a low polydispersity of 1.7. The cellulose residues deliver an efficiency of 94.4 % upon enzymatic digestion. Moreover, the DES can be easily recovered with high yield and purity, and the recycled DES still maintains high delignification and enzymatic hydrolysis efficiencies. The proposed DES pretreatment technology is promising for biomass valorization.
研究领域:
生物化学
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生物质能
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Xiangyuan Zou,Liangyi Yao,Shuqi Zhou,Guoning Chen,Shuangfei Wang,Xiuyu Liu,Yan Jiang
The design-on-demand of lignocellulose nanofibril-based materials for contaminant disposal is worth exploring. Herein, we mildly extract sulfated lignocellulose nanofibrils from bagasse via a deep eutectic solvent-based approach, and use them as a matrix for TiO 2 nanoparticles (TNPs) towards adsorption–photocatalytic synergistic removal of tetracycline (TC). The resultant lignocellulose-based nanocomposite aerogel possessing a high specific surface area (95.3 m 2 /g), surface charge density (1.78 mmol/g) and well-preserved lignocellulosic structure, strongly adsorbed TC with a maximum adsorption capacity of 70 mg/g via a combination of intermolecular interactions (i.e., hydrogen bonding and π-π stacking) and electrostatic forces . Furthermore, the excellent photocatalytic activity of uniformly distributed TNPs in combination with the outstanding adsorption capacity of nanocomposite aerogel can synergistically remove TC in a dynamic and continuous process, during which ~90 % TC (10 mg/L) was efficiently removed within 40 min. HPLC-MS was performed to reveal the degradation pathways of TC. Meanwhile, our developed nanocomposite aerogel demonstrated favorable structural stability and recyclability, which together supported its durability for environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2014
·Vol. 80
·期 8
·
IF 3.952
Kundi Zhang,Xiaohua Chen,Wolfgang H. Schwarz,Fuli Li
Two cellulolytic thermophilic bacterial strains, CS-3-2 and CS-4-4, were isolated from decayed cornstalk by the addition of growth-supporting factors to the medium. According to 16S rRNA gene-sequencing results, these strains belonged to the genus Clostridium and showed 98.87% and 98.86% identity with Clostridium stercorarium subsp. leptospartum ATCC 35414T and Clostridium cellulosi AS 1.1777T, respectively. The endoglucanase and exoglucanase activities of strain CS-4-4 were approximately 3 to 5 times those of strain CS-3-2, whereas the β-glucosidase activity of strain CS-3-2 was 18 times higher than that of strain CS-4-4. The xylanase activity of strain CS-3-2 was 9 times that of strain CS-4-4, whereas the β-xylosidase activity of strain CS-4-4 was 27 times that of strain CS-3-2. The enzyme activities in spent cultures following cocultivation of the two strains with cornstalk as the substrate were much greater than those in pure cultures or an artificial mixture of samples, indicating synergism of glycoside hydrolase secretomes between the two strains. Quantitative measurement of the two strains in the cocultivation system indicated that strain CS-3-2 grew robustly during the initial stages, whereas strain CS-4-4 dominated the system in the late-exponential phase. Liquid chromatography-tandem mass spectrometry analysis of protein bands appearing in the native zymograms showed that ORF3880 and ORF3883 from strain CS-4-4 played key roles in the lignocellulose degradation process. Both these open reading frames (ORFs) exhibited endoglucanase and xylanase activities, but ORF3880 showed tighter adhesion to insoluble substrates at 4, 25, and 60°C owing to its five carbohydrate-binding modules (CBMs).
研究领域:
微生物学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
Agronomy-Basel
·
2022
·Vol. 12
·期 2
·476
·
IF 3.949
Gang Chu,Zifeng Han,Zimo Wang,Defeng Kong,Wenxiu Qin,Youbin Si,Guozhong Wang,Christian E. W. Steinberg
Massive biomass waste with lignocellulose components can be used to produce biochar for environmental remediation. However, the impact of lignocellulose pyrolysis on biochar structure in relation to the sorption mechanism of ionizable antibiotics is still poorly understood. In this paper, diverse techniques including thermogravimetric analysis and13C nuclear magnetic resonance were applied to investigate the properties of biochars as affected by the pyrolysis of cellulose and lignin in feedstock. Cellulose-derived biochars possessed more abundant groups than lignin-derived biochars, suggesting the greater preservation of group for cellulose during the carbonization. Higher sorption of sulfamethoxazole (SMX) was also observed by cellulose-derived biochars owing to hydrogen bond interaction. Sorption affinity gradually declined with the conversion aliphatic to aromatic carbon, whereas the enhanced specific surface area (SSA) subsequently promoted SMX sorption as evidenced by increased SSA-N2and SSA-CO2from 350 to 450 °C. The decreasedKd/SSA-N2values with increasing pH values implied a distinct reduction in sorption per unit area, which could be attributed to enhanced electrostatic repulsion. This work elucidated the role of carbon phases from thermal conversion of lignocellulose on the sorption performance for sulfonamide antibiotics, which will be helpful to the structural design of carbonaceous adsorbents for the removal of ionizable antibiotics.Keywords:biochar;lignocellulose pyrolysis;carbon phase;ionizable antibiotics;sorption mechanism
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Haitao Yu,Zhimin Xue,Ruifen Shi,Fengyi Zhou,Tiancheng Mu
Deep eutectic solvents (DESs) composed by carboxylic acids and quaternary ammonium salts are potential candidate for lignocellulose dissolution and pretreatment . To both explore the most efficient DESs for lignocellulose dissolution and pretreatment as well as unveil the process mechanism, DESs composed by carboxylic acids as the hydrogen bond donors (HBDs) and quaternary ammonium salts as the hydrogen bond acceptors (HBAs) were prepared and further applied for kraft lignin (KL) dissolution as well as poplar and pine pretreatment. We found DES composed by lactic acid (LA) and allyltrimethylammonium chloride (ATMAC) with mole ratio of 2:1 is high-efficient for the dissolution of KL. In addition, 70% poplar lignin and 82% pine lignin could be removed at 120 ℃ for 6 h with a solid-to-liquid ratio of 1:10. Furthermore, the -OH and -COOH groups in HBDs of DESs provided active protons to cleave ether bonds and part of carbon-carbon bonds during lignin dissolution and extraction. Additionally, the KL solubility and the Kamlet-Taft (K-T) parameters (α and π * ) of the DESs showed good positive correlation. These findings give a deep insight into the dissolution mechanism of KL and pretreatment of lignocellulose, which is helpful for designing robust DESs for dissolution and pretreatment of lignocellulose.
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Xi Xu,Junyuan Gan,Yun Huang,Jiapin Liu,Ling Zhao,Chengwei Li,Jiepeng Chen,Xing Li,Mingshan Wang,Yuanhua Lin
The adoption of gel polymer electrolyte (GPE) is a solution to efficiently solve the serious security risk of lithium-ion batteries (LIBs). GPE based on lignocellulose (LC) and sodium alginate (SA) was prepared. When the proportion of SA reaches up to 20 wt.%, the obtained composite membrane has a liquid electrolyte uptake of 337 wt.% and a porosity of 58%, and its mechanical strength is over four times than that of pure LC-based membrane. In addition, the corresponding GPE with 20 wt.% SA (GLCSA-20) presents high lithium-ion transference number of 0.76, distinguished ion conductivity of 2.70 × 10 − 3 S cm − 1 , excellent discharge specific capacity (124 mAh cm − 1 at 1 C when 200th cycle of Li∥GLCSA-20∥LiFePO 4 ) and outstanding cyclic stability. These virtues support that the GLCSA-20 has great potential for applications in safe LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）