International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hongying Cheng,Song Liu,Cuiying Hu,Hongxia Wang
A novel flower-like film composed of uniform hollow TiO 2 -NH 2 nano-shell (HTNs), luminol and aniline was synthesized by electro-copolymerization method in acidic ionic liquid EmimCl (IL, 1-ethyl-3-methylimidazolium chloride). The surficial morphology of the film was characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), selected-area electron diffraction (SAED) and atomic force microscope (AFM), which showed the polycrystalline property. Its copolymerization mechanism was discussed in detail, which presented symmetric arrangement. The most obvious multiple increase of peak current in CV indicated the conjugate of HTNs in luminol structure and in aromatic ring skeleton. This film with excellent electrocatalysis performance used for nonelectroactive acetochlor (ACT) detection showed the lowest catalytic potential. Some important parameters were optimized for a homogeneous film and for a sensitive detection. On the optimum film, the electrocatalysis sensor exhibited a linear response within the concentration range of ACT from 2.0×10 −7 M to 1.5×10 −5 M, and an absolute detection limit of 0.15×10 -9 M at a signal-to-noise ratio of 3. Then the proposed method was used for the detection of ACT residue in the real strawberry sample with good results. The promising sensor presents good reproducibility and stability, providing a new fast and sensitive method for the analysis of real samples in environment.
研究领域:
材料科学
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环境科学
·
分析化学
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DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 18
·8703-8710
·
IF 6.233
Fang Deng,Lujuan Min,Xubiao Luo,Shaolin Wu,Shenglian Luo
Conductive polypyrrole–polyaniline/TiO2 nanocomposites (PPy–PANI/TiO2) were prepared by in situ oxidative copolymerization of pyrrole and aniline monomers in the presence of TiO2. For comparison studies, polypyrrole/TiO2 (PPy/TiO2) and polyaniline/TiO2 (PANI/TiO2) were also prepared. The samples were characterized by X-ray diffraction, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, zeta potential analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis and photocurrent tests. In contrast to PPy/TiO2 and PANI/TiO2, PPy–PANI/TiO2 exhibits obvious absorption in the visible-light range, and is much superior to PPy/TiO2 and PANI/TiO2 in thermal stability. It is found that PPy–PANI/TiO2 performs well in the visible-light photocatalytic degradation of 4-nitrophenol. The optimized pyrrole : aniline : TiO2 molar ratio for best performance is 0.75 : 0.25 : 100. The efficacy of PPy–PANI/TiO2 is attributed to its conductivity, conjugated structure, as well as to the synergy amidst polypyrrole, polyaniline and TiO2.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 12
·
IF 1.64
Qi Li,Yiquan Chen,Xinpu Song,Yingpeng Xie,Qiong Hou,Guang Shi
By adjusting the molar ratios of antistatic monomer of octyl phenol ethylene oxide acrylate (denoted as AS), rigid monomer of methyl methacrylate (denoted as MMA), and flame-retardant monomer of 2-(phosphoryloxymethyl oxyethylene) acrylate (denoted as FR), a series of flame-retardant antistatic copolymers poly (octyl phenol ethylene oxide acrylate-co-methyl methacrylate-co-phosphoryloxymethyl oxyethylene acrylate) (donated as AMF) were synthesized through radical polymerization. Among the obtained copolymers, two copolymers, AMF162 (the feed molar ratio of AS, MMA, and FR as 1 : 6 : 2) and AMF1104 (the feed molar ratio of AS, MMA, and FR as 1 : 10 : 4) with different concentrations were added into polypropylene (PP) to prepare PP-AMF162 and PP-AMF1104 series of composites. The thermal stability, limiting oxygen index, the antistatic property, and mechanical properties of PP composites were tested and analyzed. PP-AMF162 series composites have excellent antistatic effect. When the AMF162 content was equal to or <15 wt %, the impact strength of PP-AMF162 composites was higher than that of pure PP. The results indicated that copolymer AMF162 was a suitable flame-retardant and antistatic additive for PP. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41677.
研究领域:
高分子化学
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材料科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Hongjuan Wang,Duo Qian,Xilin Xiao,Bo He,Shuqin Gao,Han Shi,Lifu Liao,Jian Deng
Highly selective determination of enantiomers by electrochemical sensors with simple recognition elements is of great interest in pharmaceutics, biochemistry and medical fields. The present work developed an innovative electrochemical sensor, which based on boron-embedded molecularly imprinted hybrid film (B-MIHF) modified carbon paste electrode (CPE), for enantioselective determination of S -ornidazole ( S -ONZ). A boron-embedded conductive copolymer was firstly electro polymerized on carbon paste electrode (CPE), and then molecularly imprinted polysiloxanes (MIP) were hydrolyzed and condensed over the conductive copolymer layer via a sol-gel process. The as-prepared B-MIHF, comprised the advantages of boron-embedded conductive copolymer and molecularly imprinted polysiloxanes, could not only implement direct signal transformation between imprinted cavities and sensing elements, but show amazing selectivity to template S -ornidazole. Above all, the introduction of coordinate interaction formed between trisubstituted boron atoms embedded in B-MIHF matrix and nitrogen atoms of template endow the sensor with intensive enantioselectivity. Under optimum experiments conditions, the reduction peak currents of S -ONZ by differential pulse voltammetry were linear to S -ONZ concentrations in the range from 6.0 × 10 −8 to 1.0 × 10 −6 mol L −1 and 1.0 × 10 −6 to 3.5 × 10 −4 mol L −1 with a detection limit of 1.1 × 10 −8 mol L −1 . The B-MIHF-based sensor has been successfully applied for the determination of S -ONZ in pharmaceutical and biological samples with good precision (RSD 2.25–4.11%) and acceptable recoveries (96.00–108.00%).
研究领域:
药学
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生物化学
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医学
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 30
·期 1
·42
·
IF 4.2
Huixian Li,Xiaomeng Sun,Datai Liu,Xinchang Liu,Xianchao Du,Shuai Li,Xiaojing Xing,Xinfeng Cheng,Dongqin Bi,Dongfang Qiu
In this article, a series of novel conducting copolymers P(FuPy-co-EDOT) are prepared via cyclic voltammetry electropolymerization method by using N-furfuryl pyrrole (FuPy) and 3,4-ethylenedioxythiophene (EDOT) as comonomers. The molecular structure, surface morphology, electrochemical, and optical properties of the resulting copolymers are characterized in detail upon varying the feed ratios of FuPy/EDOT in the range of 1/1 to 1/9. The results demonstrate that the prepared P(FuPy-co-EDOT) copolymers with a higher proportion of EDOT units (FuPy/EDOT: 2/8~1/9) possess good redox activity, tunable optical absorption performances, and low band gaps (1.75~1.86 eV). Spectroelectrochemistry studies indicate that the resulting copolymers with increased EDOT units show strengthened electrochromic characteristics, exhibiting a red-to-green-to-blue multicolor reversible transition, especially for the P(FuPy1-co-EDOT9) copolymer films. They also show increased optical contrast (9~34%), fast response time (0.8~2.4 s), and good coloring efficiency (110~362 cm2C−1). Additionally, the complementary bilayer P(FuPy-co-EDOT)/PEDOT electrochromic devices (ECDs) are also assembled and evaluated to hold excellent electrochromic switching performances with relatively high optical contrast (25%), rapid response time (0.9 s), and satisfactory coloring efficiency (416 cm2C−1). Together with the superior open circuit memory and cycling stability, they can be used as a new type of electrochromic material and have considerable prospects as promising candidates for electrochromic devices.
研究领域:
材料科学
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电化学
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光学材料
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Lin Guo,Wen-Bin Ma,Yao Wang,Xiang-Zhu Song,Jie Ma,Xiao-Dong Han,Xue-Yu Tao,Li-Tong Guo,He-Liang Fan,Zhang-Sheng Liu,Ya-Bo Zhu,Xian-Yong Wei
The supercapacitors with conventional multilayer structure exhibit a large contact resistance and tend to delaminate because of the relative displacement under external force. Herein, the all-in-one flexible supercapacitors are fabricated by integrating chemically crosslinked hydrogel electrolytes with conducting copolymer electrodes. The hydrogel electrolyte is prepared by chemically crosslinking reaction of polyvinyl alcohol (PVA) and polyethylene glycol (PEG) with glutaraldehyde (GA) where the hydroxyl groups (-OH) of PVA and PEG react with aldehyde groups (-CHO) of GA to form acetal or hemiacetal in sulphuric acid solution. The prepared hydrogel electrolyte exhibits better mechanical properties (tensile strength of 36 KPa under strain of 117%) and remarkable ionic conductivity (67.1 mS cm −1 ) than pure PVA hydrogel. Based on this gel electrolyte, a novel flexible supercapacitor with an all-in-one (electrode-electrolyte-electrode) configuration is designed by in situ polymerization of poly (pyrrole-co-aniline) onto PVA/PEG gel electrolyte to achieve exceptional electrochemical performance. This all-in-one configuration can maintain fast charge-carrier transportation and good structural stability. The resulting device shows a large specific capacitance of 773 mF cm −2 at the current density of 0.2 mA cm −2 , excellent energy density (54 μWh cm −2 ) and power density (100 μW cm −2 ). Under different bending angles or 1000 bending cycles, the capacitance of the device is maintained at 100% which owing to the all-in-one configuration can overcome the relative displacement and avoid the loss of electroactive materials from gel electrolytes when the device is bent. These findings present potential applications in flexible, wearable and smart energy storage devices.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Ziyue Wang,Huan Liu,Yicheng Peng,Jiyang Xie,Chengding Gu,Wanbiao Hu
Enhancing the breakdown strength (Eb) and polarization of the polymer-based composites through improving the effective interface bonding between the inorganic fillers and polymer matrix is always pursued to achieve high electrostatic energy storage performances. Along with this, paraelectric–ferroelectric (P–F) structured bipolymer PMMA-P(VDF-HFP) was copolymerized and blended to maintain the high Eb but reduce the residual polarization, and meanwhile, potassium triniobate (KNb3O8) rods synthesized by a molten salt (KCl and K2SO4) method were surface-modified using a polydopamine (PDA) shell to form fillers for the fabrication of the composite films that were prepared by a solution casting process. The fabricated PDA@KNb3O8/PMMA-P(VDF-HFP) composite film by filling only a tiny amount of PDA@KNb3O8 (1.0 wt %) exhibits a much enhanced dielectric constant (ε ∼ 9) and polarization (Pmax ∼ 6.9) and large Eb (∼600 MV m–1), therefore giving rise to a high energy density of 15.30 J cm–3 combined with a discharge energy efficiency of 65%. The results herein can be comparative and superior to those of many high-energy storage inorganic–polymer systems that may render this system much potential for dielectric energy storage capacitors.
研究领域:
材料科学
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电气工程
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复合材料
·
能量存储
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DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2019
·
IF 4.511
Huanhuan Yan,Linlong Li,Zongliang Wang,Yu Wang,Min Guo,Xincui Shi,Jui-Ming Yeh,Peibiao Zhang
Electrically conducting polymers have been emerging as intelligent bioactive materials for regulating cell behaviors and bone tissue regeneration. Additionally, poor adhesion between conventional implants and native bone tissue may lead to displacement, local inflammation, and unnecessary secondary surgery. Thus, a conductive bioadhesive with strong adhesion performance provides an effective approach to fulfill fixation and regeneration of comminuted bone fracture. Inspired by mussel chemistry, we designed the conductive copolymers poly{[aniline tetramer methacrylamide]-co-[dopamine methacrylamide]-co-[poly(ethylene glycol) methyl ether methacrylate]} [poly(ATMA-co-DOPAMA-co-PEGMA); AT:conductive aniline tetramer; DOPA:dopamine; PEG:poly(ethylene glycol))] with AT content 3.0, 6.0, and 9.0 mol %, respectively. The adhesive strength of this copolymer was enhanced during tensile process perhaps due to the synergistic effects of H-bonding, π–π interactions, and polymer long-chain entanglement, reaching up to 1.28 MPa with 6 mol % AT. Biological characterizations of preosteoblasts indicated that the bioadhesives exhibited desirable biocompatibility. In addition, the osteogenic differentiation was synergistically enhanced by the conductive substrate and electrical stimulation with a square wave, frequency of 100 Hz, 50% duty cycle, and electrical potential of 500 mV, as indicated by ALP activity, calcium deposition, and expression of osteogenic genes. The ALP activity at 14 days and calcium deposition at 28 days on the 9 mol % AT group were significantly higher than that on PLGA under electrical stimulation. The expression value of OPN for 9 mol % AT group was notably upregulated by 5.9-fold compared with PLGA at 7 days under electrical stimulation. Overall, the conductive polymers with strong adhesion can synergistically upregulate the cellular activity combining with electrical stimulation and might be a promising bioadhesive for orthopedic and dental applications.
研究领域:
材料科学
·
生物医学工程
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组织工程
·
生物材料
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2012
·Vol. 30
·期 2
·259-266
·
IF 0.755
Zhihong Zhang,Guijuan Li,Fufeng Yan,Zhonghou Zhang,Shaoming Fang
In order to exploit the applications of polypyrrole (PPy) derivatives in biosensors and bioelectronics, the different immobilization mechanisms of biomolecules onto differently functionalized conducting PPy films are investigated. Pyrrole and pyrrole derivatives with carboxyl and amino groups were copolymerized with ω -( N -pyrrolyl)-octylthiol self-assembled on Au surface by the method of the chemical polymerization to form a layer of the copolymer film, i.e. , poly[pyrrole- co -( N -pyrrolyl)-caproic acid] (poly(Py- co -PyCA)) and poly[pyrrole- co -( N -pyrrolyl)-hexylamine] (poly(Py- co -PyHA)), in which the carboxyl groups in poly(Py- co -PyCA) were activated to the ester groups. Based on the structure characteristics, the immobilization/hybridization of DNA molecules on PPy, poly(Py- co -PyCA) and poly(Py- co -PyHA) were surveyed by cyclic voltammograms measurements. For differently functionalized copolymers, the immobilization mechanisms of DNA are various. Besides the electrochemical properties of the composite electrodes of PPy and its copolymers being detected before and after bovine serum albumin (BSA) adsorption, the kinetic process of protein binding was determined by surface plasmon resonance of spectroscopy. Since few BSA molecules could anchor onto the PPy and its copolymers surfaces, it suggests this kind of conducting polymers can be applied as the protein-resistant material.
研究领域:
材料科学
·
生物化学
·
生物物理学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）