COLLOIDS AND SURFACES B-BIOINTERFACES
·
2013
·
IF 3.554
Jiahui Yu,Xiangyang Li,Yu Luo,Wei Lu,Jin Huang,Shiyuan Liu
This research is aimed to develop a kind of poly(ethylene glycol) shell-sheddable magnetic nanomicelle as the carrier of doxorubicin (Dox) in order to enhance its cellular uptake ability, and achieve synchronous magnetic resonance imaging (MRI)-visible function. Firstly, the five-member rings in poly ( l -succinimide) (PSI) were successively opened by the amino terminated disulfide-linked poly(ethylene glycol) monomethyl ether (mPEG-SS-NH 2 ) and dopamine (DA) to produce the graft copolymer of mPEG-SS-NH- graft -PAsp-DA. And then, drug-loaded magnetic nanomicelles of mPEG-SS-NH- graft -PAsp-DA@Fe 3 O 4 .Dox were obtained by the Fe 3 O 4 nanoparticle-induced self-assembly of mPEG-SS-NH- graft -PAsp-DA. These magnetic nanomicelles showed spherical shapes with average particle size of about 120 nm measured by dynamic light scattering (DLS). Due to the detachment of PEG shell in the presence of dithiothreitol (DTT), the magnetic nanomicelles showed accelerated in vitro release of Dox, and enhanced cellular uptake ability. Compared with free Dox, the Dox-loaded magnetic nanomicelles showed essential decreased cytotoxicity against Bel-7402 cell line. If its high r 2 relaxation rate (221 mM −1 s −1 ) and good negative contrast effect for magnetic resonance imaging (MRI) were taken into account, mPEG-SS-NH- graft -PAsp-DA@Fe 3 O 4 .Dox could be used as MRI-detectable drug carrier of Dox with enhanced cellular uptake ability.
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高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Yanling Hao,Zhixing Gan,Jiaqing Xu,Xinglong Wu,Paul K. Chu
Although carbon quantum dots (CQDs) possess excellent luminescence properties, it is a challenge to apply water-soluble CQDs to tunable luminescent devices. Herein, quaternary CQDs are incorporated into poly(ethylene glycol) to produce poly(ethylene glycol)/CQD composite solid films which exhibit strong and tunable blue–red emission. The fluorescent quantum yield reaches 12.6% which is comparable to that of many liquid CQDs and the photoluminescence characteristics are determined to elucidate the fluorescence mechanism. The CQD solid films with tunable optical properties bode well for photoelectric devices especially displays.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiaxing Fu,Boyan Fu,Leyao Bi,Jiahui Lin,Junsheng Wen,Wenyue Tian,Chunjie Wang,Yue Wang
Given the potential risks of metabolic toxicity and organ damage associated with ethylene glycol vapor exposure, the implementation of effective monitoring is essential. In this study, LaFeO 3 -SnO 2 composites with varying mass ratios were synthesized via a hydrothermal-water bath method and subsequently evaluated for ethylene glycol sensing properties. Experimental results indicate that the LaFeO 3 :SnO 2 composite with a mass ratio of 1:2 shows the best sensing performance toward ethylene glycol among all samples. At 145 °C, it achieves a response of 89.522–100 ppm ethylene glycol, which is 435.4 % and 3137.7 % higher than the responses of pure SnO 2 and LaFeO 3 , respectively. Moreover, the operating temperature is 90 °C lower than that of pure LaFeO 3 . Meanwhile, the sensor exhibited great selectivity, repeatability and long-term stability. The improved performance could be attributed to the unique morphology of the LaFeO 3 -SnO 2 composite and the formation of a p-n heterojunction, which facilitated enhanced charge transfer and provided more active sites for ethylene glycol adsorption. Furthermore, density functional theory (DFT) calculations were performed to theoretically confirm the enhancing effect of the heterojunction on the sensing performance. This work is expected to provide new insights and serve as a valuable reference for the application of LaFeO 3 -SnO 2 gas sensors in the detection of ethylene glycol.
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ENERGY & FUELS
·
2019
·
IF 3.021
Shuang Zhu,Jiaolai Xu,Hanlin Cheng,Jiajun Gao,Xingmao Jiang,Chunxi Li,Weimin Yang
Poly(ethylene glycol) diacid [dcPEG, HOOCCH2(OCH2CH2)nOCH2COOH] can form a deep eutectic solvent (DES) with tetraethylammonium chloride (TEACl). The dcPEG-based DES (dcPEG-250/TEACl) as extractant (Ex) showed high performance for both basic and nonbasic N-species. In n-octane model oil, N-distribution coefficient [DN, (μgN·gEx–1)/(μgN·goil–1)] can be more than 100 for both indole and pyridine. In real oils, the DES was still effective (DN > 2.0; oil yield > 96.0%). The excellent performance was due to contributions of TEACl: (1) weakening the intermolecular interaction of dcPEG; (2) releasing Lewis basic −(OCH2CH2)n–; (3) intensifying polarity of the extractant. Extractive behaviors for the both N-species can be reflected by Freundlich- or Langmuir-like relationships between equilibrium N-contents in the extractant and the oil phases, respectively. It was interesting that, from dcPEG-250 to dcPEG-250/TEACl, the behaviors significantly changed. For the nonbasic, the extraction changed from chemical behavior with H-bonding to pseudo-physical one caused by solvent polarization. For the basic, it moved away from reactive behavior and changed to the chemical one involving acid–base interaction.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2013
·Vol. 25
·期 3
·723-731
·
IF 2.141
Shi Zhonggen,Guo Rui,Li Weichang,Zhang Yi,Xue Wei,Tang Yu,Zhang Yuanming
Chitosan (CS) was first modified hydrophobically with deoxycholic acid (DCA) and then with polyethylene glycol (PEG) to obtain a novel amphiphilic polymer (CS–DCA–PEG). This was covalently bound to folic acid (FA) to develop nanoparticles (CS–DCA–PEG–FA) with tumor cell targeting property. The structure of the conjugates was characterised using Fourier transform infrared and 1 H nuclear magnetic resonance spectroscopy and X-ray diffraction. Based on self-aggregation, the conjugates formed nanoparticles with a low critical aggregation concentration of 0.035 mg/ml. The anti-cancer drug doxorubicin (DOX) was encapsulated into the nanoparticles with a drug-loading capacity of 30.2 wt%. The mean diameter of the DOX-loaded nanoparticles was about 200 nm, with a narrow size distribution. Transmission electron microscopy images showed that the DOX-loaded nanoparticles were spherical. The drug release was studied under different conditions. Furthermore, the cytotoxic activities of DOX in CS–DCA–PEG–FA nanoparticles against folate receptor (FR)-positive HeLa cells and FR-negative fibroblast 3T3 cells were evaluated. These results suggested that the CS–DCA–PEG–FA nanoparticles may be a promising vehicle for the targeting anticancer drug to tumor cells.
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MATERIALS & DESIGN
·
2018
·
IF 4.525
Bing Cong,Youxin Song,Naiqing Ren,Gongshan Xie,Can Tao,Yiping Huang,Gewen Xu,Junjie Bao
An environmental friendly waterborne polyurethane (WPU) dispersion was synthesized from polyethylene glycol (PEG), hexamethylene diisocyanate (HDI), diethylene glycol (DEG) and dimethylol propionic acid (DMPA). Solid polymer electrolytes based on WPU and LiTFSI were fabricated via an organic solvent free process. The LiTFSI salts were found to be dissolved in WPU by the coordination of Li + ion with carbonyl and ether group in WPU. The as-prepared WPU showed a semi-crystalline structure and became amorphous after adding lithium salts. The ionic conductivities increased with the increase of salt concentration and followed the Arrhenius behavior. The 20 wt% LiTFSI in WPU electrolyte showed a superior comprehensive performance with an ionic conductivity of 7.3 × 10 −4 and 2.2 × 10 −3 S cm −1 at 60 °C and 80 °C. All-solid-state LiFePO 4 /SPE/Li cell using this electrolyte exhibited an initial discharge capacity of 151 mAh g −1 at 0.1C under 60 °C. All of these results demonstrate that this new WPU-based solid polymer electrolyte is a promising environmentally friendly candidate for all-solid-state lithium ion batteries .
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NANOTECHNOLOGY
·
2023
·
IF 3.5
Feitong Lu,Wei Wei,Qiang Shi,Ning Wang,Yi Xiao,Zibo Li
TiO2/graphene oxide (GO) nanocomposites with high contact interface were prepared with glycol 400 (PEG400) served as dispersant. This nanocomposite exhibits improved photocatalytic efficiency in contrast with the nanocomposite prepared without PEG400. In this work, the photocatalytic performance was investigated by observing the degradation rate of Rhodamine B (RhB). And it is found that the mass ratios of GO in nanocomposites plays an important role. When the mass ratio of GO reached 45%, the photocatalytic performance of the nanocomposites reached the highest, which is ~72%. Moreover, the photocatalytic mechanism was studied through theoretical calculations, which can be summarized as follows: 1. The presence of GO decreases the band gap of TiO2 nanoparticles. 2. GO inhibits the the recombination of photogenerated electron-hole pair. 3. GO improves the adsorption capacity of TiO2 nanoparticles for RhB. This work promoted the application of TiO2/GO nanocomposites in wastewater treatment.
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高影响因子
DALTON TRANSACTIONS
·
2014
·Vol. 43
·期 33
·12648-12656
·
IF 4.097
Huan Yu,Yang Zhu,Hui Yang,Kazuki Nakanishi,Kazuyoshi Kanamori,Xingzhong Guo
A facile and “green” method was proposed to introduce Ag nanoparticles (Ag NPs) into the hierarchically monolithic silica uniformly in the presence of (3-aminopropyl)-triethoxysilane (APTES) and ethylene glycol. APTES is used to modify the monolith by incorporating amino groups onto the surface of meso–macroporous skeletons, while ethylene glycol is employed as the productive reductant. Ag NPs are homogeneously immobilized in hierarchically monolithic silica after reduction and drying at 40 °C for different duration times, and the embedded amount of Ag NPs can reach 15.44 wt% when treated once. The embedment of Ag NPs increases with the repeat treatment and the APTES amount, without uncontrollable crystalline growth. The surface areas of Ag NPs embedded in silica monoliths after heat treatment at 300 and 400 °C are higher than those before heat treatment. The modification via APTES and the embedment of Ag NPs does not spoil the morphology of monolithic silica, while changing the pore structures of the monolith. A tentative formation process and a reduction mechanism are proposed for the modification, reduction and embedment. Ag NPs embedded in monolithic silica is promising for wide applications such as catalysis and separation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Rong Huang,Aoshuang Yang,Ziyu Liu,Fangxing Liu,Tian Fang,Fangfang He,Yongsheng Li,Zhuoni Jiang,He Lan,Kai Zhang,Wenbin Yang
Traditional poly(ethylene glycol)-based polyurethane phase change materials (PUPCMs) are difficult to reprocess and non-recyclable because of their permanently cross-linking structure, leading to issues of resource waste. To overcome this problem, this study introduces dynamic bonds in PUPCMs to develop dynamic cross-linking networks. A series of polyurethane phase change materials containing dynamic oxime-urethane bonds (DOU-PUPCMs) are prepared using poly(ethylene glycol) (PEG), dimethylglyoxime (DMG) and hexamethylene diisocyanate (HDI) as raw materials. It has been shown that the obtained DOU-PUPCMs exhibit good heat storage capability and outstanding thermal stability. Importantly, the introduction of oxime-urethane groups provided DOU-PUPCMs with processibility. After multiple reprocessing cycles, the chemical structure and energy storage capacity of the DOU-PUPCMs essentially remain consistent with the original samples. The breaking and restructuring of oxime-urethane bonds and hydrogen bonds in DOU-PUPCMs makes them recyclable. This is not only significant for the development of recyclable and sustainable energy storage materials , but also complements studies such as the application of oxime-urethane bonds to PCMs.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Zhisong Li,Linbo Wu
Poly(ethylene 2,5-furandicarboxylate) (PEF) is an important biobased polyester with better thermal, mechanical, and gas barrier properties than poly(ethylene terephthalate). In PEF synthesis, diethylene glycol furandicarboxylate (DF) is inevitably formed via etherification side reaction. Taking advantage of the side reaction, poly(ethylene-co-diethylene furandicarboxylate) (PEDF) poly(ether-ester)s were synthesized only from 2,5-furandicarboxylic acid (FDCA) and ethylene glycol (EG), using a cheap binary propanedisulfonic acid/dibutyltin oxide (PSA/DBTO) catalyst. The polymers were characterized by 1 H NMR, intrinsic viscosity, solubility, differential scanning calorimetry, thermogravimetric analysis, tensile, and gas barrier test. Due to strong acidity of PSA, not only major DF but also minor oligoethylene glycol furandicarboxylate ether-containing units were formed. Their total content can be adjusted up to 78 mol% by simply increasing the dosage of PSA from 0 to 0.4 wt%. The effect of ether-containing units on the solubility, thermal transition, mechanical, and oxygen barrier properties of the poly(ether-ester)s were examined and compared with the poly(ether-ester)s synthesized via copolycondensation.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 18
·3750
·
IF 4.6
Yawen Chang,Zijia Wang,Fujuan Liu
In recent years, membrane separation technology has undergone continuous advancements. Microfiltration (MF) membranes, as an important type, are usually prepared by electrospinning—a simple and efficient method. This study reports the development of crosslinked polyvinyl alcohol/polyethylene glycol (cPVA/PEG) nanofiber membranes through a combination of electrospinning and chemical crosslinking, investigating the effects of different crosslinking concentrations on the membrane morphology, surface wettability, and tensile properties. Comprehensive characterization was carried out by using scanning electron microscopy (SEM), a Fourier-transform infrared spectrometer (FTIR), an X-ray diffractometer (XRD), a thermogravimetric (TG) analyzer, differential scanning calorimetry (DSC), a contact angle tester, a universal testing machine, etc. The results showed that at the crosslinking concentration of 15%, the cPVA/PEG fiber membrane achieved a breaking stress of 29.07 ± 2.60 MPa, a breaking strain of 77.60 ± 6.02%, and a porosity exceeding 43%. SEM, FTIR, XRD, TG, and DSC analyses collectively confirmed the occurrence of chemical crosslinking within the membrane structure. The cPVA/PEG-15 membrane exhibited no observable shrinkage or curling upon water contact, combined with excellent hydrophilicity and lipophilicity in the air. These properties indicate that the membrane can serve as a novel functional membrane substrate (e.g., as hydrophilic separation layers) and is expected to play an important role in fields such as seawater desalination and wastewater treatment, demonstrating significant application potential.
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ACS Applied Energy Materials
·
2021
·
IF 6.024
Bohong Chang,Bo Li,Lu Pan,Hui Li,Lian Wang,Lin Fu,Zihao Li,Longwei Yin
Tin (Sn)-based perovskites as promising alternatives of Pb analogues have attracted increased attention for their ideal optical bandgap, low toxicity, and high carrier mobility but are still subject to an uncontrollable crystallization process and Sn(II)-induced serious defects and thus poor photovoltaic performance and unsatisfactory stability. Herein, we propose a strategy to construct a fluid flexible polymer scaffold by introducing an eco-friendly polyethylene glycol (PEG) polymer with plenty of ether bond groups (C–O–C) in an FASnI3 precursor to regulate the nucleation and growth of perovskite grains and fabricate uniform and full coverage perovskite films with lower defect density. We demonstrate that the hydrogen-bond interactions between FA+ and C–O–C and Lewis acid–base complexation between uncoordinated Sn and C–O–C groups can effectively regulate film crystallization behavior, improve perovskite film coverage, and reduce defect state density. Importantly, PEG as a fluid flexible polymer scaffold during the annealing process can cross-link the adjacent perovskite grains and relieve the stress between grains. With this method, we obtain high-quality PEG-modified FASnI3 perovskite films with lager grain size, higher coverage without pinholes, lower trap state density, and higher carrier lifetime. The optimized device achieves an optimal PCE of 7.53% under reverse scan and the unencapsulated device maintains more than 90% of the initial PCE after aging for 720 h in a N2 glovebox.
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危险品化学品经营许可证（带存储）