CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Ran Wei,Shuyi Zhao,Chuandong Fang,Long Jiao,Xiaoye Zhang,Xiang Chen,Soottawat Benjakul,Bin Zhang
To improve the water solubility and photodynamic inactivation (PDI) activity of curcumin (Cur), a novel methoxy polyethylene glycol amine (mPEG-NH 2 )-modified Cur derivative, mPEG-NH-Cur, was synthesized and characterized. The results showed that mPEG-NH-Cur had extremely high water solubility with a saturated solubility of 6.71 mg/mL, which was 15-fold that of Cur. Theoretical calculations revealed that the introduction of PEG markedly enhanced hydrogen bonding, electrostatic interactions, and van der Waals interactions between mPEG-NH-Cur and H 2 O while simultaneously reducing the energy gap to its excited state. These effects contributed to its enhanced stability and resistance to aggregation in aqueous solutions, thereby significantly improving its capacity for singlet oxygen ( 1 O 2 ) generation (achieving 100 % degradation of 1,3-diphenylisobenzofuran within 30 s). In the PDI preservation experiments, the peeled Pacific white shrimp ( Litopenaeus vannamei ) treated with mPEG-NH-Cur showed the greatest sensory acceptability after eight days of storage at 4 °C compared to the control group. Moreover, the inhibitory effects of mPEG-NH-Cur-mediated PDI treatment on the total volatile basic nitrogen content, pH, thiobarbituric acid value, and total viable count were significantly higher than those of the control group. Ultimately, the use of mPEG-NH-Cur increased the refrigerated shelf life of the peeled L . vannamei by 8 days. Further, the weak interaction analysis demonstrated that PEG effectively suppressed molecular aggregation through enhanced hydrogen bonding and steric hindrance over an extended duration (40,000 ps), thereby improving aqueous solubility and dispersion stability. Overall, the findings of this study provide novel insights into the potential application of Cur derivatives in PDI preservation.
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ELECTROCHIMICA ACTA
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2025
·
IF 5.6
Xinkuai He,Xu Chen,Zhousi Hu,Yiren Li,Jingjing Du,Luye Wu
Hydrogen energy, as a sustainable and efficient energy option, possesses immense potential to address energy shortages and mitigate climate change impacts. To advance alkaline water electrolysis, the development of effective and robust non-noble metal catalysts is essential. This study reports “coral island-like” structure Co-Ni-W ternary alloy electrode materials synthesized via electrodeposition in an ethylene glycol (EG) organic solvent. By precisely controlling W 6+ concentration, Co-Ni-W ternary alloys with excellent hydrogen evolution reaction (HER) catalytic performance are obtained. Cyclic voltammetry (CV) records demonstrated that Co 2+ and Ni 2+ are capable of facilitating the reduction of W 6+ , and the co-deposition of Co-W, Ni-W and Co-Ni-W alloys is governed by a typical induced co-deposition mechanism. The W content significantly affects the HER catalytic performance of the Co-Ni-W ternary alloys, increasing initially and then decreasing. The Co 46 Ni 29 W 25 ternary alloy displays an optimal HER catalytic activity and stability with an electrochemical active surface area (ECSA) of 1925 cm 2 and a hydrogen evolution overpotential ( η 10 ) of 63 mV. This study demonstrates that Co-Ni-W ternary alloy is a potential contender for alkaline water electrolysis hydrogen evolution.
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POLYMER BULLETIN
·
2016
·Vol. 74
·期 5
·1831-1847
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IF 1.371
Hou Xiaoman,Yang Wei,Li Aiming,Hou Jiazi,Zhang Chunling
A novel system for enhancing the properties of P( N -isopropylacrylamide- co -poly(ethylene glycol)diacrylate) (P(NIPAM- co -PEGDA)) temperature-sensitive hybrid hydrogels by incorporating acrylolsobutyl polyhedral oligomeric silsesquioxane (MAPOSS) was developed in this study. Inorganic/organic hybrid P(NIPAM- co -PEGDA) hydrogels based on MAPOSS were synthesized via free radical polymerization. Environmental scanning electron microscopy images showed that hydrogels with different feed ratios exhibited significant changes in the porous structure and average pore size. The heterogeneous and irregular network was caused mainly by MAPOSS aggregation. The rigid cage-like nanostructure of MAPOSS had dual opposite effects on polymer thermal properties; this effect was proven through differential scanning calorimetry and thermogravimetric analysis. The mechanical behaviors of the swollen hydrogels investigated through compression test showed that MAPOSS incorporation enhanced the yield strength. Swelling, deswelling and reswelling behaviors of hydrogels with different feed ratios were systematically examined and compared. The increase in MAPOSS provided the hydrogels with improved deswelling rate because of its cage-like nanostructure and hydrophobicity.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 39
·
IF 1.866
Yang Yang,Huali Luo,Jinlong Yang,Daofen Huang,Shuxue Zhou
Construction of a highly hydrophilic polymer surface with excellent long-term stability underwater is a great challenge. In this paper, a facile ultraviolet (UV) curing technique was employed to realize the three-dimensional (3D) grafting of poly(ethylene glycol) diacrylate (PEGDA, molecular weight: 400, 600, and 1000 g/mol) on a bisphenol A epoxy acrylate (BEA) sheet. The cross section morphology, surface chemical composition, and wettability of the sheets were monitored using an optical microscope, an attenuated total reflectance Fourier transform infrared spectroscope, and a water contact angle analyzer, respectively. The PEGDA-grafted epoxy sheets displayed a highly hydrophilic surface and meanwhile possessed excellent stability underwater, despite the molecular weight of PEGDA. In contrast, the PEGDA/BEA blend sheets are easily damaged underwater, due to strong swelling. In addition, the PEGDA1000-grafted BEA sheet demonstrated good antifouling performance in a natural marine environment. Nevertheless, its long-term antifouling is not satisfactory, being presumably due to hydrolysis or biodegradation of the PEG segments. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43972.
研究领域:
高分子科学
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材料工程
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表面改性
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海洋防污涂层
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ACS Applied Materials & Interfaces
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2026
·
IF 7.8
Shilong Zheng,Kangjie Sun
Phase change materials (PCMs) have attracted significant attention for thermal energy storage, but the development of shape-stabilized organic composite PCMs with suitable leakage resistance and thermal performance remains challenging. In this study, wheat straw was used as the precursor and pretreated with KH-570 before carbonization at four different temperatures to prepare modified biochar supports. The effects of KH-570 modification and carbonization temperature on the pore structure of wheat-straw-derived biochar and the thermal performance of three representative organic PCMs, namely paraffin, stearic acid, and polyethylene glycol, were systematically investigated. The results showed that KH-570 modification improved the pore characteristics of wheat-straw biochar. The sample carbonized at 550 °C exhibited the highest specific surface area of 38.4 m2/g, representing a 9.4% increase compared with the corresponding unmodified sample. Nitrogen adsorption–desorption analysis revealed hysteresis behavior, and the average pore diameter of the modified samples increased by 19.00–30.49% compared with the unmodified samples. The melting and crystallization enthalpies of the composite PCMs increased by 5.64–7.99% after modification, with the paraffin-based system showing the most notable improvement. Thermogravimetric analysis showed lower mass-loss rates and higher residual masses for the modified composites, with residual mass increases of 14.11%, 27.29%, and 23.15% for the paraffin-, stearic acid-, and polyethylene glycol-based composites, respectively, indicating improved thermal stability under the tested conditions. Overall, under the present experimental conditions, KH-570 pretreatment was associated with incremental improvements in pore accessibility, support-PCM compatibility, and latent-heat utilization of wheat-straw-biochar-supported shape-stabilized composite PCMs.
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高影响因子
MACROMOLECULES
·
2026
·
IF 5.7
Ying Zheng,Mengru Ding,Chang Zeng,Lingling Ni,Wangkai Xiang,Chengtao Yu,Meijin Jin,Tengjiao Hu,Guorong Shan,Yongzhong Bao,Junfeng Liu,Pengju Pan
Poly(ether ester)s (PEEs) are an important class of thermoplastics that combine the good physical performance of both polyether and polyester blocks. However, their heterogeneous block structures complicate both the synthesis and the crystallization of PEEs. In this study, we synthesized a series of long-spaced PEEs with an alternative distribution of ether and ester segments from diethylene glycol (DEG) and n-methylene diacids (n = 6–18) and investigated their polymorphic crystallization and phase transition. The melting temperature and crystallinity of PEEs enhance with increasing the CH2 segment length of used diacid monomer. Interestingly, PEEs show temperature-dependent crystal polymorphism and multistage phase transition, depending on the CH2 segment length and crystallization temperature (Tc). Dual and triple crystal polymorphisms are found in the PEEs with medium CH2 segments (growth of hexagonal form II and form I at low and high Tc, respectively) and in those with long CH2 segments (growth of orthorhombic form III, hexagonal form II, and form I at low, medium, and high Tc, respectively). Phase transitions of form III to II and II to I are detected in PEEs upon heating, accompanied by the increase of structural stability. This study provides fundamental guidance for developing PEEs with tunable crystalline structures and properties.
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JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Zhenyu Zhang,Juan Liu,Ting Li,Zhikai Fu,Jinshui Mao,Xiaocheng Li,Sili Ren
Recycling of Nd(III) and Dy(III) from waste NdFeB magnets is increasingly critical in the sustainable development of rare-earth elements (REEs) industry. The efficient separation of Nd(III) and Dy(III) from conventional aqueous solution by solvent extraction (SX) is facing huge challenge due to the high activity, high interfacial tension and the high dielectric constants of water that affect the coordination of REEs with the extractant. Herein, a novel non-aqueous solvent extraction (NASX) system based on neutral extractant P350 was developed to extract Nd(III) and Dy(III) with high extraction efficiency and separation factor. In this extraction system, the majority of water in the aqueous phase was replaced by different low-dielectric-constant polar molecular organic solvents (PMOSs) to reduce the influence of water during extraction. The effect of the type and content of PMOSs, P350 concentration, extract equilibration time and temperature on the separation performance were systematically investigated. It was encouraging to find that the favorable separation factor of Nd(III) and Dy(III) elements ( β Nd/Dy ) was determined to be 201 when extracted from 70 vol% PEG 200 with 0.2 mol/L P350, which was higher than that in traditional extraction from aqueous phase. Slope analysis method was used to determine the extractant stoichiometry and the main species of extraction complex was identified as DyCl 3 ·2L which was verified by Fourier infrared spectroscopy (FT-IR). Furthermore, in the simulation of recovery of NdFeB magnetic immersion solution experiment, the extraction efficiency (E%) of Dy(III) can reach 85 %, while co-extraction of Nd(III) was only 6 % and the β Dy/Nd was as high as 83.4. According to the McCabe-Thiele diagram, 3-stages counter-current solvent extraction was needed to completely extract Dy(III). Moreover, 97.11 % of Nd(III) and 98.5 % of Dy(III) in the loaded organic phase can be sequentially stripped by 0.04 mol/L and 0.4 mol/L HCl, respectively. These results indicated that the developed processes in this work have superior extraction efficiency, large separation factors and excellent stripping stability. Eventually, a P350-PEG 200 extraction system-based separation process was proposed in the hope of providing a novel and low-cost alternative to the efficient recycle of Nd(III) and Dy(III) from end-of-life NdFeB.
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Cancer Nanotechnology
·
2023
·Vol. 14
·期 1
·1-20
·
IF 5.7
Sharifi Majid,Kheradmandi Rasoul,Alizadeh Morteza
For the treatment of triple-negative breast cancer (TNBC), without expression of estrogen, progesterone and HER2 receptors, specific treatment guideline is still under criticism, especially in tumor hypoxia. But assuming the molecular similarity of TNBC with breast cancer gene-1-related cancers, gemcitabine may be used in TNBC treatment on the nanozyme platform combined with photodynamic therapy (PDT). After designing the nanozyme with four components, platinum–cobalt: with catalase/peroxidase capabilities, hyaluronic acid: nanozyme targeting by interacting with CD44 receptor, poly[ethylene glycol]: water-soluble macromolecule for immune escape, and Gem: antitumor drug, its physicochemical properties was investigated by thermogravimetric, X-ray diffraction and energy dispersive X-ray, and therapeutic effects in in vitro and in vivo. The results show that platinum–cobalt@gemcitabine-hyaluronic acid-polyethylene glycol (PtCo@Gem-HA-PEG) especially synergized with PDT has high toxicity on 4T1 cells and tumor by enhancing the catalase-/peroxidase-like activities to produce O2, O2•− and •OH, and increase the intracellular free radicals. PtCo@Gem-HA-PEG inhibits tumor development by increasing drug accumulation in the tumor and enhancing apoptotic mechanisms through synergistic activity with PDT. Nevertheless, the major organ damage confirmed by the histological method in the long-term application of PtCo@Gem-HA-PEG, makes their application challenging due to permanent catalytic activity. However, results of improved drug permeability based on reduced hypoxia, higher drug retention, and enzyme-like activity that could be synergized with other therapeutic approaches like a PDT, have made their use attractive. Hence, this study provides a promising path in the TNBC treatment by nanozymes, which requires further toxicological investigations.Graphic Abstract
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 7
·3011
·
IF 4.6
Xianjun Hou,Chen Chu,Hua Jiang,Mohamed Kamal Ahmed Ali,Karl D. Dearn
As the critical component of automotive engine coolant, ethylene glycol (E.G.) significantly matters in heat dissipation. In this study, the key aim is to investigate the heat transfer behaviour of E.G. as nano-additives base fluid. The heat transfer capability of E.G./SiC nanofluid (N.F.) was experimentally and theoretically evaluated via transient hot wire methods and equilibrium molecular dynamics (EMD) simulation, respectively. M.D. simulation exhibited a great ability to accurately forecast the thermal conductivity of N.F. compared with the experiment results. The results confirmed that the thermal stability of N.F. is relatively greater than that of E.G. base fluids. An improvement mechanism of thermal conductivity and thermal stability under an atomic scale via the analysis of mean square displacement (MSD) and radial distribution function (RDF) calculation was elaborately presented. Ultimately, the results indicated that the diffusion effect and the increasing transition rate of liquid atoms are responsible for thermal conductivity enhancement.Keywords:thermophysical performance;interface effect;molecular dynamic;nanofluids
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2023
·
IF 7.8
Jia Wang,Li Liu,Li’ao Wang,Jianhua Lu,Yujie Li
In this study, a mass transfer model for hollow fiber membrane contactors (HFMC) was developed to theoretically investigate the mass transfer performance of volatile methyl siloxane (VMS) separation by HFMC. In addition, the effects of operating parameters such as filling rate, liquid and gas velocities on the effectiveness of HFMC separation of VMS were experimentally investigated. The experimental results showed that the increase of filler fraction improved the removal of siloxane . When the absorbent velocity was 250 mL/min and the gas velocity was 500 mL/min, the removal rates of L2, D4, and D5 were 74%, 92%, and 89%, respectively. Additionally, the fluxes of L2, D4 and D5 also increased with the increase of gas and liquid velocities , which were in good agreement with the calculated results of the mass transfer model . The faster the gas and liquid velocities , the higher the total mass transfer coefficient, which indicated that the mass transfer resistance was reduced in the contactor system. The liquid phase mass transfer resistance contributed the most to the total mass transfer resistance in the non-wetting model. However, when the membrane was 10% wetted, the mass transfer resistance contribution of the membrane increased sharply, reaching a maximum of 38.2%.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Tuhe Shi,Dongyang Niu,Jiahui You,Shuang Li,Guifei Li,Kaixuan Ren,Shifeng Yan,Guohua Xu,Jingbo Yin
The lack of interconnected macro-porous structure of most injectable hydrogels lead to poor cell and tissue infiltration. Herein, we present the fabrication of injectable macro-porous hydrogels based on “smashed gels recombination” strategy. Chitosan/polyethylene glycol-silicotungstic acid (CS/PEG-SiW) double-network hydrogels were prepared via dual dynamic interactions. The bulk CS/PEG-SiW hydrogels were then smashed into micro-hydrogels with average sizes ranging from 47.6 to 63.8 μm by mechanical fragmentation. The CS/PEG-SiW micro-hydrogels could be continuously injected and rapidly recombined into a stable porous hydrogel based on the dual dynamic interactions between micro-hydrogels. The average pore size of the recombined porous CS/PEG-SiW hydrogels ranged from 52 to 184 μm. The storage modulus, compress modulus and maximum compressive strain of the recombined porous CS/PEG-SiW 1.0 hydrogels reached about 47.2 %, 28.2 % and 127.6 % of the values for their corresponding bulk hydrogels, respectively. The recombined porous hydrogels were cytocompatible and could effectively support proliferation and chondrogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). In a rat cartilage defect model, recombined porous CS/PEG-SiW hydrogels could promote cartilage regeneration. Hematoxylin and eosin (H&E), Safranin-O/Fast green and immunohistochemical staining confirmed the accumulation of glycosaminoglycans (GAG) and type II collagen (Col II) in regenerated cartilage.
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Journal of Energy Storage
·
2023
·
IF 9.4
Weihao Xu,Jingtao Su,Jiahui Lin,Jintao Huang,Mengman Weng,Yonggang Min
The first case of utilizing MXene as an “enhancer” for light-thermal absorption and conversion of biomass diatom-based phase change materials (PCMs) to prepare novel shape-stabilized phase change materials (SSPCMs) is introduced. The SSPCMs composed of MXene-containing diatomite as a supporting material, and polyethylene glycol (PEG) as phase change material could be fabricated by a simple melt impregnation method. The chemical properties and thermal performance of all SSPCMs are characterized and analyzed. No chemical reactions were involved between PEG and the supporting material. Prepared by the theoretical mass ratio, the SSPCM-2 shows a good phase change performance and thermal stability with a relative enthalpy efficiency of 99.2 %. Furthermore, the thermal conductivity of SSPCM-2 rose by 111.8 % over PEG and by 11 % over SSPCM-1. More importantly, the light-thermal absorption and conversion efficiency of SSPCMs were effectively facilitated by the introduction of the MXene “enhancer”. This study provides a novel strategy for preparing high-performance of light-response biomass SSPCMs, which can be harnessed for solar thermal energy storage .
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危险品化学品经营许可证（带存储）