CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Xinxin Lv,Yan Hong,Zhengbiao Gu,Li Cheng,Zhaofeng Li,Caiming Li,Xiaofeng Ban
Starch-lipid complexes have potential applications in functional foods, food additives, and food packaging materials. High-amylose corn starch (HACS) is a promising raw material for starch-lipid complexation. To overcome the poor gelatinization of HACS under atmospheric pressure, we leveraged the capacity of a CaCl 2 aqueous solution to dissolve HACS, thereby streamlining the preparation of HACS-lipid complexes. Taking myristic acid (MA) as example, the HACS-MA (H-MA) complex prepared in deionized water exhibited a complexing index (CI) of 36.15 %, whereas that prepared in CaCl 2 aqueous solution achieved a significantly higher CI of 89.03 %. Chemical group analysis and thermal characterization indicated that Ca 2+ ions not only enhanced HACS dissolution through metal-dipole interactions but also bound to the hydroxyl oxygen atoms of starch, forming a coordination structure that promoted a single helical arrangement. This study clarifies the mechanism of starch-lipid complexation in CaCl 2 aqueous solution and defines the role of Ca 2+ ions in the complexes.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hang Xu,Lili Jiang,Yan Hu,Jitao Lin,Chao Zhou,Zhijun Zhong,Xiaomin Li,Chuanqiang Yin,Changxin Tang,Lang Zhou
Polyimide (PI) has emerged as a promising material for constructing efficient gas separation membranes due to its excellent stability and gas separation properties. Herein, we report a novel composite membrane structure that utilizes the synergistic effect to achieve efficient H 2 /CO 2 separation by skillfully integrating the advantages of three different functional layers. The support layer consists of a PI fiber membrane loaded with zeolitic imidazolate framework-67 (ZIF-67) using an in-situ growth method, which not only enhances the overall mechanical strength of the membrane, but also provides complex gas transport pathways to improve selectivity. The intermediate layer is made of polydimethylsiloxane (PDMS), which prevents excessive penetration of the selective layer solution into the support layer. The selective layer is a mixed matrix membrane composed of polyetherimide (PEI) as the polymer matrix and zeolitic imidazolate framework-67 (ZIF-67) as the porous filler, which provides critical molecular sieving functionality. Compared to pure polyetherimide (PEI) film, the composite membranes have significantly improved mechanical and gas transport properties, with H 2 permeability of 83.4 Barrer and H 2 /CO 2 selectivity of 5.4. Additionally, the composite membranes exhibit excellent hydrophobicity and thermal stability. Given their outstanding overall performance, the composite membranes developed in this study demonstrate significant potential for CO 2 capture and H 2 recovery applications.
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Reaction Chemistry & Engineering
·
2025
·
IF 3.1
Yuhan Wang,Mohsin Pasha,You Ma,Guozhi Qian,Minjing Shang,Yuanhai Su
The photochemical transformations under solvent-free conditions provide a gateway towards sustainable and green chemistry. In this work, we established a continuous-flow photochemical system with a capability of automatically switching between different capillary microreactors and synthesized quadricyclane from norbornadiene under solvent-free conditions at near-unity conversion and yield in short residence times and low photosensitizer loading. Various parameters such as photocatalyst loading, capillary size, geometry and configuration were investigated to optimize the quadricyclane yield and selectivity. We developed an updated kinetic model for this solvent-free reaction system and validated its zero-order kinetics by varying light intensity, initial NBD concentration and photosensitizer. This kinetic model was also validated under double-side irradiation conditions that involved the presence of reflecting mirror. Computational fluid dynamics (CFD) simulations were performed to characterize the light intensity distribution, and the shape and size of the capillary microreactor were integrated into the reaction rate equation as an auxiliary variable of light intensity to define the effective specific surface area. Moreover, the scope of linear correlations between effective surface area and apparent rate constants was extended for chip-based glass microreactors. Finally, based on the reaction rate equation, we designed and tested a reactor with high production capacity, which can achieve a daily output of 3 kg of quadricyclane.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yingbo Li,Jing Ma,Hongjun Lin,Cheng Chen,Saleam Raza,Qianqian Zeng,Xinchun Lu,Liguo Shen
The development of composite membranes utilizing transition metal carbides and nitrides, exemplified by Ti 3 C 2 T x (MXene), has proven efficacious in the treatment of oily wastewater. However, challenges arise from the prolonged and convoluted transport paths within MXene interlayer nanochannels, significantly impeding mass transfer and diminishing membrane permeability. This investigation incorporated porous covalent organic frameworks (COFs) as intercalating agents into two-dimensional (2D) MXene-based membranes to expand the interlayer nanochannels. The resulting MXene@COF-TpBD functional layer polyethersulfone (PES) composite membrane exhibited a distinctive dual superoleophobic surface, concurrently manifesting underwater superoleophobicity and underoil superhydrophobicity (underwater oil contact angle >150°, underoil water contact angle >150°). The membranes exhibited excellent water flux (up to 4092.7 L m −2 h −1 ·bar −1 ), efficient oil-water emulsion separation (up to 1908.4 L m −2 h −1 ·bar −1 , rejection rates >99.78 %), noteworthy fouling resistance and structural stability, outperforming most of existing similar membranes. Furthermore, supported by the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory, the incorporation of COF-TpBD improved the antifouling characteristics of the composite membrane. This work presents innovative insights into the improvement of 2D MXene membranes and the use of COF-TpBD for the specific remediation of oily wastewater.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Zhanwen He,Yibo Guo,Xiaomeng Zhou,Haijun Zhang
In response to the deficiencies of existing fire extinguishing agents, such as insufficient cooling performance, electrical conductivity, and the generation of toxic gases when dealing with lithium battery fires, this study has developed a composite powder fire extinguishing agent that combines commercial ABC dry powder (the main component is ammonium phosphate.) with disodium hydrogen phosphate dodecahydrate (DHPD) to address lithium-ion battery fires. Experiments have shown that 35 %DHPD@ABC can reduce the fire temperature by 297 °C within 20 s in a oil pool fire experiment, representing a 34 % improvement in cooling performance. In thermal runaway (TR) suppression tests, it rapidly lowers the battery temperature to 162 °C, with an 80 % increase in cooling efficiency and effective prevention of TR propagation. Differential scanning calorimetry (DSC) and thermogravimetric infrared (TG-IR) analyses reveal that the fire-extinguishing mechanism integrates chemical inhibition with physical cooling and isolation. This composite powder fire extinguishing agent offers an innovative strategy for the prevention of lithium-ion battery fires.
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Animal Nutrition
·
2025
·
IF 7.5
Qingyan Yin,Xingwei Jiang,Huifeng Liu,Peiyue Wang,Xiaodong Su,Jun Zhang,Xinjian Lei,Junhu Yao
An essential function carried out by bile acids (BA) is to aid in lipid absorption, as they emulsify lipids and combine with them to form chylomicrons. While BA have been utilized as lipid emulsifiers in monogastric and aquatic animals, their impact on ruminants remains relatively unexplored. Two experiments were conducted to investigate the effects of BA on the lipid absorption of lactating dairy goats. In experiment 1, twelve lactating goats with similar days in milk (42 ± 2 d), body weight (46.2 ± 5.1 kg), and milk yield (1.62 ± 0.33 kg) were administered four BA doses (0, 1, 2, or 4 g/d) to explore the effects of BA supplementation. The results observed a positive correlation between the BA dose and plasma total bile acid concentration ( P < 0.001). Notably, when goats received BA, there was a trend of increase in the proportion of preformed fatty acids in milk ( P = 0.079). In experiment 2, eighteen lactating goats with similar days in milk (100 ± 6 d), body weight (45.0 ± 3.7 kg), and milk yield (1.60 ± 0.31 kg) were divided into two groups (HF and HFB): HF group received no BA, while HFB group received BA (4 g/d). Both the groups were fed diets with fat powder supplementation (1% of dry material) for 5 weeks. BA supplementation led to a significant increase in milk yield ( P = 0.024) and fat concentration ( P = 0.045). Meanwhile, there was a significant rise of total bile acid concentration in plasma ( P < 0.001), rumen ( P < 0.001) and feces ( P < 0.001). Additionally, BA supplementation had a significant impact on blood metabolism, up-regulating 241 metabolites and down-regulating 208 metabolites ( P < 0.05). BA supplementation also altered the correlations among various plasma lipid components ( P < 0.05). In fatty acid (FA) analysis, 26 different FA were detected, out of which 16 showed significant down-regulation upon BA supplementation ( P < 0.05). In conclusion, BA supplementation positively influenced lactating dairy goats, particularly when fed diets with fat powder supplementation. BA supplementation enhanced milk yield, improved milk fat concentration, and significantly altered lipid-related blood metabolism. These findings suggest that BA supplementation could be a valuable strategy for enhancing dairy production and lipid metabolism in dairy goats, offering potential benefits for the dairy industry.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiabing Chen,Xiaowei Zhu,Mengheng Wang,Xingmao Jiang,Xiaojun Lu
The reaction rate of alkoxycarbonylation is typically lower when using heterogeneous catalysts compared to homogeneous catalysis, primarily due to the reduced ability of the active sites to activate the reactants. To address the insufficient activation of reactants on the Ru/CeO 2 catalyst for ethylene methoxycarbonylation, this study investigates the doping of CeO 2 with Pr 3+ ions. By substituting Ce 4+ with Pr 3+ in the CeO 2 , richer oxygen vacancies are generated, which enhance the activation of CH 3 OH. This doping significantly increases the reaction rate of ethylene methoxycarbonylation to methyl propionate (MP), achieving a rate of 86.1 g·g Ru -1 ·h −1 while maintaining a selectivity of over 99 %. Notably, Pr doping also induces the formation of Ru-O-Ce species in the catalyst, which hinders the reduction of Ru species. However, this hindered reduction is counterbalanced by the enhanced dispersion of Ru species, as Pr doping promotes the formation of smaller Ru nanoparticles. Thus, an optimal level of Pr doping exerts a synergistic effect by positively influencing both the CeO 2 support and the Ru metal, thereby improving their respective abilities to activate the reactants and enhancing the overall performance in the ethylene methoxycarbonylation reaction to produce MP.
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RARE METALS
·
2025
·
IF 11
Jiang Xue,Qu Dan-Yao,Zhang Jun-Nan,Kloper Viki,Zhang Ke-Fan,Zhang Guang-Jian,Wang Lei,Pan Ming-Hu,Guo Quan-Min,Chen Li,Huang Wei-Tian,Gao Jian-Zhi,Haick Hossam,Wu Wei-Wei
The field of disease smelling diagnosis has experienced a major breakthrough with the development of the electronic nose (E-nose) that utilizes thiol-capped gold nanoparticles (GNPs). This study focuses on overcoming the challenges of sensors to detect VOCs stably confounding with interferents of humidity and pressure, and clarifying their essential mechanism. An innovative and straightforward method for synthesizing GNPs and modifying their surface has been developed. This unique approach deviates from the conventional Brust method by completely removing any traces of tetraoctylammonium bromide (TOAB), ensuring reproducibility and simplicity of use. This modification enhances the sensor’s responsiveness to both polar and non-polar VOCs, as well as strengthen selectivity and anti-interferant capabilities. The mechanism of generating sensing cross-talk from TOAB residue is proposed through rigorous sensing experiments, X-ray photoelectron spectroscopy (XPS) results, and theoretical analysis. Thus, this study enhances the responsiveness of the sensor to both polar and non-polar VOCs, while also strengthening its selectivity and anti-interferent capabilities. This could potentially revolutionize the practical applications of E-nose in smelling diagnosis. Graphical abstract
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LANGMUIR
·
2025
·
IF 3.9
Li Wang,Yi Zeng,Ruiqi yin,Yi Zheng,Zhen Li,Lihua Zhou,Guilong Yan,Zhenyu Li,Jingyu Chen,Jingjuan Lai,Dong Li,Dong Xiang,Chunxia Zhao,Hui Li,Bo Yu,Xuezhong Zhang,Han Li,Xungai Wang,Yuanpeng Wu
Oil spill pollution poses a severe environmental threat, necessitating the development of efficient and sustainable remediation strategies. In this study, we designed and synthesized a series of pH-responsive phase-selective organogelators (pRPSOGs) based on d-gluconic acetal derivatives with long-chain amine groups to selectively solidify oil in oil/water mixtures, facilitating its rapid removal and recovery. The gelation behavior, phase-selective capability, and pH-switchable properties of the synthesized pRPSOGs were systematically investigated by using inversion tests, rheological analysis, Fourier transform infrared spectroscopy, X-ray diffraction, and small-angle X-ray scattering. Molecular simulations were further conducted to elucidate the self-assembly mechanism of the gelators. The optimized gelator, A12, exhibited excellent thermal stability and mechanical strength, ensuring structural integrity during oil spill recovery. Importantly, the pH-responsive property of A12 allowed for reversible solubility modulation, enabling efficient separation and recovery of both the gelator and oil phase without the need for energy-intensive distillation. This innovative strategy provided a reusable, energy-efficient, and environmentally friendly approach for oil spill treatment, offering promising applications for large-scale environmental remediation.
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Food Chemistry-X
·
2025
·
IF 8.2
Tiantian Zhang,Shuaishuai Dai,Ben Niu,Chaoyi Shen,Huizhi Chen,Ruiling Liu,Hangjun Chen,Weijie Wu,Haiyan Gao
Headspace gas chromatography-ion mobility spectrometry (GC-IMS) and gas chromatography–mass spectrometry (GC–MS) were used to investigate the potential reaction mechanism of the oxidation process that alters the volatile organic compounds (VOCs) and fatty acid content of prepared pork products during storage. GC-IMS detected a total of 38 volatile flavor compounds, of which 16 were identified as key differential markers through orthogonal partial least squares-discriminant analysis (OPLS-DA) with variable importance in projection (VIP) values ≥1. Correlation analysis with 10 fatty acids showed that oxidative decomposition of oleic and linoleic acids increased the content of hexanal, glutaraldehyde, butanal, and (E)-2-heptenal, resulting in a warmed-over flavor (WOF). These results demonstrate that lipid oxidation is the primary driver of flavor deterioration in prepared pork products. This study provides critical insights into the formation mechanism of WOF and establishes a theoretical foundation for developing effective strategies to control flavor loss in meat products.
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Membranes
·
2025
·Vol. 15
·期 10
·316
·
IF 3.6
Yuan Zhai,Zimeng Zheng,Xinhao Cui,Kun Jiang,Ao Sheng,Heyun Wang
In this study, hydrophilic covalent organic framework (COF) nanosheets with triazine structures and hydrophobic COF nanosheets with fluorinated imine skeletons were designed to enhance the membrane separation process for ethanol pervaporation. The mass transfer of ethanol–water mixtures within the confined structures of COF nanosheets was investigated through experimental characterization and computational simulations, establishing a quantitative relationship between mass transfer performance and the pore size/chemical properties of COF nanosheets. These COF nanosheets were employed to optimize the confined architecture of mixed matrix membranes (MMMs), effectively regulating the critical parameters of MMMs and improving their separation performance. Through systematic investigation of formation mechanisms and modulation principles, we revealed the correlation between confined structural parameters and membrane separation efficiency. This work develops methodologies and foundational theories to overcome the permeability-selectivity trade-off effect, providing theoretical guidance for designing novel membrane materials with ethanol-permelective COF-based MMMs.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yichun Zhang,Tianqi Wei,Xin Zhong,Zhiguang Guo
In recent years, water pollution caused by oily wastewater discharged from industrial production has become increasingly serious. There was an urgent need for a simple, efficient, and environmentally friendly method to treat oily wastewater, so as to reduce and solve the water pollution problem. In this study, a layer of cellulose hydrogel was coated on stainless steel mesh (SSM) by a dipping coating method, and nanozeolitic imidazolate framework-8 (ZIF-8) particles were grown in situ using the hydrogel as the matrix. The surface roughness of cellulose@ZIF-8@SSM was improved, and its hydration ability was enhanced. The prepared superhydrophilic-underwater superoleophobic cellulose@ZIF-8@SSM can separate different oil/water mixtures under gravity and has long-term separation ability. What is more, the oil–water separation efficiency was more than 99.997%. In addition, cellulose@ZIF-8@SSM showed good chemical and mechanical stability in acid and alkali solution immersion and sand impact tests. This work has broad application prospects and potential in the field of treating oily wastewater.
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