Nanomaterials
·
2024
·Vol. 14
·期 15
·1308
·
IF 4.4
Youheng Wang,Xianjun Hou,Hong Yu,Weiwei Guan,Yuxin Ma,Mohamed Kamal Ahmed Ali
As an environmentally friendly material, biochar is increasingly being utilized in the field of heat transfer and thermal conduction. In this study, nano-biochar was prepared from high-pressure homogenization (HPH) using sesame stalks as the raw material. It was incorporated into ethylene glycol (EG) and its dispersion stability, viscosity, and thermal conductivity were investigated. The nano-biochar was stably dispersed in EG for 28 days. When the concentration of the nano-biochar added to EG was less than 1%, the impact on viscosity was negligible. The addition of 5 wt.% nano-biochar to EG improved the thermal conductivity by 6.72%, which could be attributed to the graphitized structure and Brownian motion of the nano-biochar. Overall, nano-biochar has the potential to be applied in automotive thermal management.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Weiwei Liu,Shuangkun Zhang,Zhi Qiao,Qi Li,Xiaoyu Li,Haiqiao Wang
A series of PEG-based star polymers with hexa(eugenol) cyclotriphosphazene (HECTP) core and controlled number of PEG arms have been prepared in high yields via simple thiol-ene click reaction combining Dicyclohexylcarbodiimide/4-Dimethylaminopyridine (DCC/DMAP) esterification under very mild experimental conditions, and their potential for application as surfactants was investigated. The surface activities, including the critical micelle concentration (CMC) and surface tension at CMC, of the polymer aqueous solutions were studied. The results showed that PEG-based star polymers with two arms have good surface activities such as low surface tension (low to 36.1 mN/m), good emulsification ability, due to their structural features similar to Gemini surfactants . Whereas, the PEG-based star polymers with more than two arms exhibited very low CMC values (low to 0.004 mg/ml) and strong emulsification ability, therefore they could be utilized as surfactants to form high internal phase emulsions (HIPEs). Using these new PEG-based star polymers as surfactants, a very low surfactant concentration (0.01 wt %) was sufficient to form oil-in-water emulsions with long-term stability more than 6 months. Although further studies are necessary to clarify the interfacial properties , this work opens a new study field for this kind of important organic-inorganic hybrid materials.
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 48
·33917-33925
·
IF 10.7
Yi Ma,Luming Li,Jialing Tang,Zongkun Hu,Yong Zhang,Huan Ge,Ning Jian,Jun Zhao,Andreu Cabot,Junshan Li
Plastics have become an integral part of modern society due to their excellent mechanical properties, light weight, chemical stability and low cost. However, their continuous production and use worldwide have resulted in a major environmental problem. In this context, the green degradation and upcycling of waste plastics using electrochemical oxidation present a promising solution. To make this solution practical, the development of cost-effective catalysts optimized for this reaction is essential. In this study, we propose a new catalyst for the electrocatalytic reforming of ethylene glycol (EG) derived from polyethylene terephthalate (PET) to formic acid. The catalyst comprises layered Ni–Co9S8 nanosheet arrays (NSAs) grown on nickel foam (NF) via the hydrothermal method. Under EG oxidation reaction (EGOR) conditions, the Ni–Co9S8 NSAs/NF catalyst achieves Faraday efficiencies (FEs) of up to 92%. Additionally, the direct use of commercial PET plastic powder hydrolysate still enables formate FEs to exceed 90%. These outstanding results are rationalized using density functional theory (DFT) calculations providing insights into the role of the different elements in the EGOR. Overall, this study demonstrates both a synthetic strategy for transition metal sulfides and an efficient and sustainable strategy for the upgraded recycling of PET plastics.
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BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2024
·
IF 2.5
Yu Duan,Qing Wang,Xiaolong Chen,Guanyun Deng,Kunyuan Huang,Fa Sun,Jianguo Zhu,Kehua Jiang
A retrospective study reported that empagliflozin reduced the risk of urinary stone events in patients with diabetes mellitus. To further investigate empagliflozin’s potential, we conducted an animal experiment to determine whether empagliflozin can prevent renal stone formation in hyperoxaluria rats. Hyperoxaluria rat models were constructed by administrating 0.75% ethylene glycol and 1% ammonium chloride in water. The empagliflozin-treated rats were gauged with empagliflozin at different concentrations, and their body weight and blood sugar data were recorded. After 30 days of treatment, we obtained 24-hour urine, kidney, and blood samples. The urine samples were subjected to component detection. Blood samples were prepared for component detection and cytokines detection. Renal samples were subjected to von Kossa staining, transmission electron microscopy, immunohistochemistry, and transcriptome sequencing analysis. Results showed that in empagliflozin-treated hyperoxaluria rats, renal crystal deposition and mitochondria injury, urinary concentration, and excretion of oxalate were significantly decreased. Additionally, plasma levels of VEGF, IL-2, IL-1β, and MCP-1 were decreased. Immunohistochemistry showed that renal expression of KIM-1, MCP-1 was significantly decreased in empagliflozin-treated hyperoxaluria rats. Transcriptome sequencing of renal tissue represented that 25 genes were down-regulated while 12 were up-regulated in empagliflozin-treated hyperoxaluria rats. These regulated genes were mainly enriched in fatty acid metabolism, insulin resistance, muscle contraction, bile secretion, and parathyroid metabolism. Our animal experiments found that empagliflozin could reduce urinary concentration and excretion of oxalate and inhibit renal inflammation, then abating renal calcium oxalate deposition in hyperoxaluria rats in a non-diabetic state.
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高影响因子
IONICS
·
2024
·Vol. 30
·期 5
·2665-2676
·
IF 2.4
Li Xiaogang,Tu Huan,Wu Rui,Wang Zongnan,Zhou Yanhui,Zong Yujie,Lu Yaokang,Qian Li,Zhang Yixian,Song Siyu,Meng Chunfeng,Yuan Aihua
Aqueous zinc-ion batteries are considered promising energy storage devices due to their low cost, high capacity, and high safety. However, the application of aqueous zinc-ion batteries is subject to the limits of Zn anode reversibility, such as the formation of Zn dendrites, Zn anode corrosion, and hydrogen evolution reaction. In this study, we reported an electrolyte additive ethylene glycol monomethyl ether (MOE) with a modulated electrolyte solvation structure, which can suppress the growth of Zn dendrites and enhance the reversibility of Zn chemistry. The MOE molecular shows a higher electron cloud density of oxygen atoms, which enhances the strength of H–O covalent bonds. Therefore, MOE can break the interaction between H 2 O and H 2 O and the interaction between H 2 O and Zn 2+ . The solvation structure of Zn 2+ is optimized to improve the reversibility of the Zn anode. As a consequence, the reversibility of Zn plating/stripping is promoted by 20% MOE-modified electrolyte with high CE of 99.4% at the current density of 1 mA cm −2 , stably cycled for 2100 cycles. The Zn||Zn symmetrical cells can keep dendrite-free cycling for more than 4000 h in the same target electrolyte. In addition, the Zn||V 2 O 5 cell can exhibit excellent long cycling stability for over 1000 cycles even at 5 A g −1 with the reversible capacity of 100 mAh g −1 . This work provides a universal additive strategy to design versatile electrolytes for aqueous zinc-ion batteries.
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 22
·11124-11130
·
IF 8.867
Xiaochen Liu,Guoliang Ding,Xinhong Zhou,Shizhen Li,Weisheng He,Jingchao Chai,Chunguang Pang,Zhihong Liu,Guanglei Cui
Polycarbonate-based polymer electrolytes possess superior ionic conductivity at room temperature, higher lithium ion transference number and wider electrochemical stability window when compared with conventional poly(ethylene oxide)-based polymer electrolytes. Herein, the poly(diethylene glycol carbonate) dimethacrylate macromonomer (PDEC-DMA) was synthesized and the resultant interpenetrating network IPN-PDEC polymer electrolyte was developed via free radical in situ polymerization for polymer electrolyte Li metal batteries. This IPN-PDEC polymer electrolyte exhibited a decent ionic conductivity of 1.64 × 10−4 S cm−1 at room temperature and a wide electrochemical stability window (up to 4.5 V vs. Li+/Li). The LiFePO4/IPN-PDEC/Li and LiFe0.2Mn0.8PO4/IPN-PDEC/Li cells delivered excellent rate capability and cycling performance at room temperature. An all solid state lithium battery was also demonstrated by applying the as-prepared solid polymer electrolyte (SPE-PDEC) at a temperature of 100 °C, which displayed a superior cycling performance. Therefore, the IPN-PDEC network is a promising polymer electrolyte for solid state lithium batteries.
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JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xupeng Fu,Yuting Wang,Xiaoyu Wang,Liming Chai,Enna Wang,Zhaojun Wu,Jianbin Zhang
Density ( ρ ) and viscosity ( η ) data of the polyethylene glycol 300 (PEG300) and hydroxyethyl ethylenediamine (AEEA) mixed solution were measured at P = 1005 hPa and T = (298.15–318.15) K. Following these data, Jouyban-Acree model exhibited superior correlation to density in the mixed system compared to nonlinear least square method, while the McAllister four-body equation yielded a better fitting for kinematic viscosity than other models. Utilizing ρ and η data, the Redlich-Kister equation was employed for the systematic computation and analysis of excess molar volume ( V m E ), excess activation Gibbs free energy ( Δ G *E ), partial molar volumes ( V 1 ¯ and V 2 ¯ ), and viscosity deviation ( Δη ) in the PEG300 (1) + AEEA (2) mixed solution. These excess properties indicated the advantageous nature of intermolecular binding in the PEG300 (1) + AEEA (2) mixed solution, further substantiated on the basis of various spectroscopic characterizations. Finally, under conditions of CO 2 flow rate at 150 mL/min, absorption experiments were conducted for 4 h in the PEG300 (1) + AEEA (2) mixed solution, pure AEEA, and pure PEG300, which indicated that the mixed solution exhibited the highest CO 2 absorption capacity of 0.95 mol CO 2 /mol AEEA, demonstrating superior absorption performance compared to the two pure substances.
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Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 2
·1-15
·
IF 23.2
Hu Yang,Zhang Mengyang,Quan Bingqing,Li Xiaolong,Hu Xinpeng,Wu Hao,Huang Xianrong,Lu Xiang,Qu Jinping
With the sharp increase in modern energy consumption, phase change composites with the characteristics of rapid preparation are employed for thermal energy storage to meet the challenge of energy crisis. In this study, a NaCl-assisted carbonization process was used to construct porous Pleurotus eryngii carbon with ultra-low volume shrinkage rate of 2%, which provides enormous space for encapsulation of PEG-4000. Such composite possesses exceptional thermal stability, with an absorption rate of 88.24%, a melting enthalpy of 174.87 J/g, and a relative enthalpy efficiency of 97.78%. Consequently, the resultant composites exhibit outstanding performances in storing and releasing thermal energy for photo-thermal, electric-thermal, and magnetic-thermal conversion. This study presents a highly valuable strategy into the quick fabrication of phase change composites, facilitating their practical applications in thermal energy storage. Graphical Abstract
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 39
·期 1
·e7935
·
IF 3.7
Shu Qian,Fengli Yu,Yexin Luo,Bing Yuan,Congxia Xie,Shitao Yu
The oxidation of toluene to benzaldehyde holds great industrial significance, and it typically involves toxic reagents and/or affords difficult-to-separate product mixtures. Herein, polyethylene glycol (PEG)–bridged diimidazolium polyoxometalates (POMs) with a Keggin-type tungstovanadophosphoric heteropolyacid anion and various PEG-functionalized diimidazolium cations were prepared and evaluated as catalysts for the eco-friendly oxidation of toluene using aqueous tert -butyl hydroperoxide in acetonitrile. The bridging of diimidazolium cations by PEG enabled the fine-tuning of heteropolyanion redox properties and increased catalyst reactivity and solubility in the reaction system. The best-performing POM exhibited thermoregulated phase-separation behavior, that is, it was fully soluble in the reaction medium at elevated temperatures and hardly soluble at room temperature. Further, it showed almost no performance deterioration after sevenfold reuse and achieved an acceptable toluene conversion (82%) and benzaldehyde selectivity (68%). Thus, our work enables the development of eco-friendly processes for the catalytic oxidation of industrially relevant hydrocarbon and thus facilitates the establishment of a more sustainable society.
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Ziru Yu,Zhenghua Guo,Liang Yu,Xiao Feng,Bo Wang
Various metal–organic framework (MOF)-based porous nanomaterials have been adopted to fabricate mixed matrix membranes (MMMs) aiming at breaking through the Robeson upper bound of individual polymer membranes for gas separation. However, the insufficient compatibility between the polymeric matrix and MOF nanofillers limits the further improvement of their gas separation performance. To overcome this challenge, we constructed relatively ideal Pebax/PEG/NH2–UiO-66 mixed matrix membranes inspired by θ solvent theory of polymer solutions. Polyethylene glycol (PEG) molecules were introduced to selectively swell the polar poly(tetramethylene oxide) (PTMO) domains of the Pebax matrix via hydrophobic–hydrophilic interactions and in turn furnished dispersed “nests” for NH2–UiO-66 nanofillers with polar nature to reduce the interparticle agglomeration (PEG nesting effect). MOF nanofillers tended to be relatively undisturbed, in which either the rigidity of polymer chains or the pore blocking of MOFs seen in unideal MMMs was restricted. The PEG “nesting effect” proposed herein could bring benefits to further improve the allowed maximum loading capacity of MOF nanofillers as well as adjust the interactions therein and therefore maximize the CO2 separation performance of Pebax/PEG/NH2–UiO-66 MMMs. Compared with individual Pebax membranes, Pebax/PEG/NH2–UiO-66 with a 15 wt % loading of NH2–UiO-66 showed a 73% higher CO2 permeability (210 barrer) and a 220% higher CO2/N2 selectivity (130), which demonstrated the most dramatical increases among Pebax-based MMMs until now and as well significantly exceeded the Robeson upper bound. Therefore, the proposed PEG “nesting effect” for the preparation of θ-type MMMs holds promising potential for membrane-based carbon capture and is possibly extended to the preparation of other MMMs.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Xinyi Liu,Zhen Cheng,Nan Chen,Feng Xu,Jian Liu,Lei Ni,Juncheng Jiang
Propylene glycol ethers are a series of fine chemical products with a wide range of applications and are one of the important industrial derivatives of epoxy compounds; the thermal hazards and exothermic mechanism of the reaction process have rarely been investigated in previous studies. In this study, propylene glycol butyl ether (PNB) was prepared by the reaction of propylene oxide (PO) with n-butanol catalyzed by potassium hydroxide in semibatch mode. A Box–Behnken design (BBD) method with four factors and three levels was carried out to optimize the yield and other process parameters of the reaction. The results showed that after optimization, the maximum yield and the minimum system pressure were 85.91% and 1.752 bar, respectively, when the reaction temperature was 110 °C, the alcohol–alkane ratio was 4, the dosing rate was 10 mL/min, and the catalyst concentration was 0.5%. The thermal behavior of the propylene glycol butyl ether synthesis process was investigated by reaction calorimetry. Fourier transform infrared (FTIR) spectroscopy was used to monitor the concentration changes of the reactants and products. Differential scanning calorimetry and adiabatic calorimetry were used to study the thermal stability of the products. Meanwhile, density functional theory calculations were implemented to understand the reaction pathways and associated energies. Furthermore, the thermal runaway risk of the reaction was assessed by the risk matrix method and Stoessel criticality diagram. The results indicated that the risk level was acceptable and the critical class for this reaction was of grade 3. These findings provide guidance for the safe operation of PNB synthesis from PO, which can be used for further scale-up.
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高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
ZhangHe Wang,Chao Zeng,YuHao Wu,ChaoChen Xu,ShengMing Zhang,Peng Ji,ChaoSheng Wang,HuaPing Wang
Polyester (PET) has become the focus of research in the shrink film industry due to its good heat resistance, high transparency, and excellent mechanical properties. In order to improve the shrinkage rate of the film, amorphous PET (PETG) is usually obtained by copolymerization modification using some flexible diols and so on. However, introducing flexible structures reduces the glass transition temperature (Tg) and mechanical strength, and importantly, the gas barrier properties of most PETGs are weak. Here, a series of poly(terephthalic acid-naphthalene dicarboxylic acid-ethylene glycol-neopentyl glycol) (PENTN) were prepared by melt polymerization using different contents of 1,4-naphthalene dicarboxylic acid (1,4-NDA) or 2,6-naphthalene dicarboxylic acid (2,6-NDA). The results show that the introduction of 1,4-NDA does not enhance the Tg of the copolyesters significantly, whereas the Tg of the copolyesters increases linearly with the increase in the content of 2,6-NDA. The Tg of 2,6-PENTNs ranges from 82.2 to 90.5 °C. The crystallization is inhibited effectively due to the neopentyl glycol and exhibits good transparency (>85%) and low haze value (<4%), which results in the preparation of copolyesters that are all amorphous polymers. The differences in the effects of 2,6-NDA and 1,4-NDA on the thermal properties of the copolyesters were analyzed. Meanwhile, the copolyesters were prepared into films, and the gas barrier properties were analyzed in detail. The rheological analysis reveals the free volume of the copolyester is rapidly decreasing with the introduction of the naphthalene group structure. The gas barrier property of the copolyesters can be improved to a high level. This work provides an idea for the functionalized modification of packaging materials.
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危险品化学品经营许可证（带存储）