INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Sitan Wang,Xuan Meng,Naiwang Liu,Li Shi
Sulfated zirconia was synthesized adopting chlorosulfonic acid as a novel sulfonating reagent, with significantly improved sulfur content and less sulfur leaching than conventional sulfated zirconia. The optimized sulfonation process, guided by the incipient-wetness impregnation method, reduced the waste of energy and environmental pollution caused by the excess acid solution to a certain extent. The catalysts were characterized using EA, TGA, FTIR, XPS, XRD, FE-SEM, HR-TEM, N2 adsorption–desorption isotherms, and pyridine-adsorbed Fourier transform infrared spectroscopy (Py-FTIR) techniques to investigate the effect of synthesis variables on the physicochemical properties of the catalysts in detail. Further, the catalytic performance of these catalysts in alkylation for removing trace olefins from aromatics was systematically evaluated using a continuous-flow fixed-bed tubular microreactor. It was evident from the results that the synthesis variables, such as the concentration of chlorosulfonic acid, sulfonation time, and calcination temperature, were significant factors affecting the surface sulfur species and structural, textural, acidic properties as well as catalytic properties of the as-synthesized catalysts. The CSZ650-(0.75, 5) catalyst, synthesized by sulfonation with 0.75 M chlorosulfonic acid for 5 min and by air calcination at 650 °C, exhibited more outstanding catalytic performance than various other typical heterogeneous catalysts, such as sulfated zirconia synthesized by sulfuric acid, zeolites, and acid clay. The negligible decrease in catalytic activity over four catalytic runs revealed the excellent reusability of the CSZ650-(0.75, 5) catalyst, making the catalyst promising for industrial applications.
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
BIOPOLYMERS
·
2013
·Vol. 101
·期 3
·210-215
·
IF 2.879
Xin Liu,Tong Chen,Yan Hu,Kexin Li,Liushui Yan
Sulfated derivatives of polysaccharide from Momordica charantia L. (MCPS) with different degree of sulfation (DS) were synthesized by chlorosulfonic acid method with ionic liquids as solvent. Fourier transform infrared spectra and 13 C nuclear magnetic resonance spectra indicated that C-6 substitution was predominant in MCPS compared with the C-2 position. Compared with the native polysaccharide from Momordica charantia L. (MCP), MCPS exhibited more excellent antioxidant activities in vitro, which indicated that sulfated modification could enhance antioxidant activities of MCP. Furthermore, high DS and moderate molecular weight could improve the antioxidant activities of polysaccharide. © 2013 Wiley Periodicals, Inc. Biopolymers 101: 210–215, 2014.
研究领域:
生物大分子化学
·
药学
·
分析化学
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DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 12
·2752
·
IF 4.2
Zhimin Yang,Yu Wang,Xichang Wu,Wenxuan Quan,Qi Chen,Anping Wang
This study prepared sulfonatedCamellia oleiferashell biochar usingCamellia oleiferashell agricultural waste as a carbon source, and evaluated its performance as a catalyst for preparing biodiesel. The biochar obtained from carbonizingCamellia oleiferashells at 500 °C for 2 h serves as the carbon skeleton, and then the biochar is sulfonated with chlorosulfonic acid. The sulfonic acid groups are mainly grafted onto the surface ofCamellia oleiferashell biochar through covalent bonding to obtain sulfonic acid type biochar catalysts. The catalysts were characterized by Scanning Electron Microscope (SEM), X-ray diffraction (XRD), Nitrogen adsorption-desorption Brunel-Emmett-Taylor Theory (BET), and Fourier-transform infrared spectroscopy (FT-IR). The acid density of the sulfonatedCamellia oleiferafruit shell biochar catalyst is 2.86 mmol/g, and the specific surface area is 2.67 m2/g, indicating high catalytic activity. The optimal reaction conditions are 4 wt% catalyst with a 6:1 alcohol to oil ratio. After esterification at 70 °C for 2 h, the yield of biodiesel was 91.4%. Under the optimal reaction conditions, after four repeated uses of the catalyst, the yield of biodiesel still reached 90%. Therefore, sulfonatedCamellia oleiferashell biochar is a low-cost, green, non-homogeneous catalyst with great potential for biodiesel production by esterification reaction in future development.
研究领域:
生物化学
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环境科学
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化学工程
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可再生能源
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DOI
PubMed
高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 11
·2738-2745
·
IF 3.9
Haoran Yuan,Chengyu Li,Rui Shan,Jun Zhang,Yong Chen
A series of antibiotic residue derived solid acids were developed for the selective transformation of bio-based furfuryl alcohol into ethyl levulinate. KOH modification and chlorosulfonic acid decoration of gentamicin residue derived carbon materials played a crucial role in ethyl levulinate production. Various characterization methods were employed for unveiling the structural information regarding porous characteristics and functional groups, such as FT-IR, N2 adsorption–desorption, SEM, etc. The yields of 2-(ethoxymethyl)furan and ethyl levulinate were particularly associated with the acid density of gentamicin residue derived solid acids. Gratifyingly, a maximum ethyl levulinate yield of 84.5% was achieved at 160 °C after 1.5 h. The recovery and reutilization of the catalyst in successive reactions demonstrated that gentamicin residue derived solid acids maintained good activity and stability even after four cycles. The present research thus highlights a novel direction for high-value utilization of antibiotic residues as well as the synthesis of platform chemicals over organic waste derived catalytic materials.
研究领域:
化学工程
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催化
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材料科学
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环境科学
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生物化学
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产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Xiangyang Li,Xudong Lei,Xiangzheng Jia,Muqiang Jian,Tongzhao Sun,Xinyin Yang,Jiankun Huang,Xiaocang Han,Haolu Lin,Yunhang Li,Jiajun Luo,Xiaoxu Zhao,Enlai Gao,Xianqian Wu,Jin Zhang
Achieving simultaneous enhancement of strength and toughness in carbon nanotube fibers (CNTFs) remains a persistent challenge due to inefficient interfacial load transfer, low nanotube alignment, and high porosity. Herein, inspired by the hierarchical architecture and borate-mediated cross-linking of plant cell walls, we report a bioinspired interfacial bridging strategy to fabricate ultrastrong and tough CNTFs. This approach involves the sequential infusion of poly(pyridobisimidazole) (PIPD) nanofibers and chains into CNTF networks, followed by borate-induced covalent cross-linking and mechanical densification. The PIPD molecular backbone consists of alternating pyridobisimidazole and dihydroxyphenyl rings, which enable the formation of hydrogen bonding and borate-mediated covalent cross-linking network with CNTs. The resulting fibers exhibit strong intertube interactions, improved alignment, and reduced porosity. Consequently, CNTFs achieve an ultrahigh tensile strength of 8.45 ± 0.28 GPa and a high toughness of 238.42 ± 14.78 MJ·m–3, surpassing the performance of commercial high-performance fibers. Additionally, the fibers exhibit high impact resistance with a specific penetration energy of 1.26 MJ·kg–1, outperforming many state-of-the-art protective materials. Experimental characterizations combined with first-principles calculations reveal that the synergistic interplay between the highly ordered assembly and strengthened interfacial interactions enables cooperative deformation and efficient energy dissipation. This work establishes a scalable and biomimetic pathway for fabricating CNTFs with a combination of ultrahigh strength and toughness, making them promising candidates for advanced structural and protective applications.
研究领域:
材料科学
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纳米技术
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仿生学
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机械工程
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高分子化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Lu Zheng,Saisai Ju,Xiong Li,Yongde Ma,Hongwei Zhang,Zhenping Cai,Yanning Cao,Kuan Huang,Lilong Jiang
Efficient capture of residual NH₃ from Haber-Bosch recycling gas is essential to improve process efficiency and reduce environmental impact. In this study, a series of sulfonated porous organic polymers (PTO-1S, PTT-1S, PTF-1S) were fabricated by a post-sulfonation strategy using phenolic hydroxyl-containing precursors to capture NH 3 . Comprehensive characterizations of the sulfonated derivatives demonstrated not only the successful grafting of –SO₃H groups, but more importantly, a cooperative effect with the native phenolic –OH groups. The optimized PTO-1S achieves an outstanding NH₃ capacity of 11.52 mmol/g (at 298.2 K and 1 bar), with particularly impressive performance at low pressures (5.56 mmol/g at 313.2 K and 0.03 bar), surpassing most reported adsorbents. Mechanistic studies revealed that this cooperation creates an optimal balance of strong chemisorption (–SO₃H) and reversible hydrogen bonding (–OH), which is identified as the origin of the high capacity and exceptional cycling stability (< 1% capacity loss/cycle). Besides, the sulfonated samples maintain excellent selectivity under simulated industrial conditions (NH₃/N₂/H₂ mixtures) and a rapid adsorption rate (90% saturation within 2 min), demonstrating their potential for practical NH₃ recovery applications.
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DOI
高影响因子
MACROMOLECULAR BIOSCIENCE
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2025
·
IF 4.1
Wanyi Zhao,Haoran Chen,Man Zhang,Zhongbing Huang,Changsheng Zhao
Vascular restenosis, a significant complication after stent implantation, originates from the migration of vascular smooth muscle cells to the intima and the excessive extracellular matrix deposition, resulting in intimal hyperplasia. Thus, enhancing endothelial cell adhesion and reducing smooth muscle cell adhesion capacity are crucial to address this issue. Heparin, a naturally derived glycosaminoglycan, exhibits excellent anticoagulant activity and endothelial cell promoting effects, yet its clinical utility is constrained by bleeding risks, supply instability, immunogenicity, and demanding storage conditions. In this study, sulfonated carboxymethyl chitosan (SCCS) is employed as a heparin-mimicking polymer, immobilized on a glass substrate via dopamine-mediated adhesion. Compared with carboxymethyl chitosan, the SCCS-coated substrate significantly promotes endothelial cell adhesion while effectively inhibiting smooth muscle cell attachment. Additionally, the whole blood cell analysis and complement activation results exhibit that the SCCS coating has excellent blood compatibility. These findings suggest that the SCCS coating has the potential to be applied on various vascular stents to prevent restenosis, offering a nobel strategy for improving vascular interventional therapy.
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
·
IF 4.389
Sheng Yan,Ming-Ming Tu,Yun-Ren Qiu
Polysulfone (PSf) membrane is widely employed in blood purification fields, but the blood compatibility of PSf membrane is not adequate. To improve the hemocompatibility of PSf membrane, 4-(chloromethyl)benzoic acid (CMBA) and sulfonated hydroxypropyl chitosan (SHPCS) were grafted onto PSf membrane surface. In our strategy, CMBA was firstly grafted on the PSf membrane surface through the Friedel-Crafts alkylation reaction, and the product was named BAPSf membrane. Then, SHPCS was grafted onto the BAPSf membrane surface by esterification , and the product was named SHPCS-BAPSf membrane. The effects of temperature and reaction time on the productivity of BAPSf and the grafting density of carboxyl and the effects of reaction time on the grafting density of SHPCS grafted onto the BAPSf membrane surface were studied. The SHPCS-BAPSf membranes are investigated by ATR-FTIR, XPS , contact angle measurements and evaluated by blood compatibility in vitro. The results reveal that the hydrophilicity of SHPCS-BAPSf membranes were grealy improved and the evaluation of protein adsorption , hemolysis test, platelet adhesion plasma recalcification time(PRT), activated partial thromboplastin time(APTT), prothrombin time(PT) and thrombin time(TT) confirmed that the SHPCS-BAPSf membranes have remarkable blood compatibility.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Omega
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2024
·
IF 3.7
Xuan Yan,Yucheng Liu,Zhengmeng Hou,Lina Yuan,Jun Yang,Wenxin Dong
The chemical cleaning method is the simplest approach for degreasing oil-based drilling cuttings (ODCs), with the effectiveness of the treatment relying mainly on the selection of the surfactant and the cleaning conditions. However, achieving the standard treatment of ODCs directly using conventional surfactants proves challenging. In light of this, this study introduces a synthesized and purified Gemini surfactant named DCY-1. The structure of DCY-1 was confirmed through Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analyses. The characterization in this article encompasses the use of an interface tension meter, nanoparticle size analysis, scanning electron microscopy, and infrared oil measurement. The critical micelle concentration (CMC) of DCY-1 was determined to be 3.37 × 10–3 mol/L, with a corresponding γcmc value of 37.97 mN/m. In comparison to conventional surfactants, DCY-1 exhibited a larger micelle size of 4.52 nm, approximately 24.52% larger than that of SDS. Moreover, the residual oil rate of 3.96% achieved by DCY-1 was the lowest among the chemical cleaning experimental results. Through a single-factor experiment, the optimal cleaning ability of DCY-1 for ODCs was determined as follows: a surfactant concentration of 3 mmol/L, a temperature of 60 °C, an ODC/liquid mass ratio of 1:4, a cleaning duration of 40 min, and a stirring speed of 1000 rad/min. Under these optimal conditions and after merely two cleaning procedures, the residual oil content of ODCs was reduced to 1.64%, accompanied by a smooth and loose surface structure.
研究领域:
环境科学
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化工工程
·
表面活性剂技术
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2024
·
IF 5.1
Yunchao Zheng,Lidao Song,Minqi Liu,Wei Wei,Huiming Xiong
Electrophilic isothiocyanates and nucleophilic aziridines have been successfully copolymerized to produce polyisothioureas through either condensation or chain growth polymerization. Aziridine-derived zwitterionic intermediates (ZWIs) present in the polymerization have been identified unambiguously by employing real-time high-resolution mass spectrometry (HRMS) and time-evolving proton nuclear magnetic resonance spectra (1H NMR), which has been revealed to play critical roles in both copolymerization processes. The spontaneous condensation–polymerization is found to proceed readily via the ZWIs free of any initiator and catalyst, involving cationic polymerization to produce polyimine content. Alternatively, transformation of the condensation–polymerization into comparably fast chain growth polymerization can be achieved by introducing an anionic nucleophile to initiate and activate the ZWI served as the monomer herein, leading to well-defined fully alternating copolymers of the isothiourea repeat unit (−NC(═N)S−) with discrete chain ends, which is supported by the density functional theory (DFT) calculations. The DFT calculations also suggest that the formation of the ambiphilic ZWIs would be favored between the pairs of the nucleophilic aziridine with a higher energy of the highest occupied molecular orbital (HOMO) and the electrophilic isothiocyanate possessing a lower energy of the lowest unoccupied molecular orbital (LUMO), and the reactivity of the ZWI in the polymerization is influenced by its electronic structure.
研究领域:
聚合物化学
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材料科学
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物理化学
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产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 21
·2958
·
IF 4.7
Jianrong Xia,Haobin Wu,Kaidong Chen,Yanling Li,Xin Lu,Sibo Ding,Xuelin Zheng
This study successfully developed a bio-based, photocurable, anionic–nonionic dual-functional chain extender, and sulfonated cardanol-based polyethylene glycol (SCP), derived from renewable resources—cardanol and polyethylene glycol—for application in waterborne polyurethane dispersions (WPUDs). Utilizing SCP as a chain extender, WPUDs were prepared through a typical acetone process with poly(butylene adipate) (PBA), isophorone diisocyanate (IPDI), and ethylene diamine (EDA) at a constant NCO/OH ratio of 1:1. This research focused on the effects of polyethylene glycol molecular weight and SCP dosage on the particle size, stability, and film-forming properties of the WPUD. Optimal dispersion stability and film-forming performance were achieved with a polyethylene glycol molecular weight of 1500 and a PBA to SCP molar ratio of 4:1, yielding a particle size of 0.326 ± 0.010 μm and excellent storage stability over six months. The resulting WPU coatings exhibited a tensile strength of 11.4 MPa, which increased to 16.8 MPa after UV irradiation owing to the formation of a semi-interpenetrating network via the photopolymerization of cardanol’s unsaturated side chains. UV cross-linking also enhanced water resistance, reducing the water absorption rate (WAR) from 18.68% to 4.21% and the water vapor transmission rate (WVTR) from 6.59 × 10−5g·m⁻¹·Pa⁻¹·d⁻¹ to 2.26 × 10⁻⁵ g·m⁻¹·Pa⁻¹·d⁻¹, while also improving thermal stability. These findings demonstrate that SCP offers a sustainable and effective solution for developing high-performance WPU coatings.
研究领域:
材料科学
·
可持续化学
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2024
·Vol. 16
·期 15
·2208
·
IF 4.7
Kun Cai,Jinzhu Yu,Wenjun Tan,Cong Gao,Zili Zhao,Suxin Yuan,Jinghui Cheng,Yajie Yang,Ye Yuan
Nafion membranes are widely used as proton exchange membranes, but their proton conductivity deteriorates in high-temperature environments due to the loss of water molecules. To address this challenge, we propose the utilization of porous aromatic frameworks (PAFs) as a potential solution. PAFs exhibit remarkable characteristics, such as a high specific surface area and porosity, and their porous channels can be post-synthesized. Here, a novel approach was employed to synthesize a PAF material, designated as PAF-45D, which exhibits a specific surface area of 1571.9 m2·g−1and possesses the added benefits of facile synthesis and a low cost. Subsequently, sulfonation treatment was applied to PAF-45D in order to introduce sulfonic acid groups into its pores, resulting in the formation of PAF-45DS. The successful incorporation of sulfonic groups was confirmed through TG, IR, and EDS analyses. Furthermore, a novel Nafion composite membrane was prepared by incorporating PAF-45DS. The Nyquist plot of the composite membranes demonstrates that the sulfonated PAF-45DS material can enhance the proton conductivity of Nafion membranes at high temperatures. Specifically, under identical film formation conditions, doping with a 4% mass fraction of PAF-45DS, the conductivity of the Nafion composite membrane increased remarkably from 2.25 × 10−3S·cm−1to 5.67 × 10−3S·cm−1, nearly 2.5 times higher. Such promising and cost-effective materials could be envisioned for application in the field of Nafion composite membranes.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）