JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Pengjun Yao,Farao Zhang,Yang Yu
In this paper, the mole fraction solubility of 2-hydrazino-4-methylbenzothiazole (MHB) in acetone, toluene, methanol, ethanol, water, ethyl acetate, n-propanol, isopropanol, 1-butanol, and methanol/ethanol/n-propanol/acetone + water was determined by the isothermal saturation method at 273.15 to 318.15 K under 101.2 kPa. Meanwhile, high-performance liquid chromatography was used to detect the solubility of MHB. The mole fraction of MHB increased with the increase of temperature in monosolvents, and the composition of solvent mixtures also played a decisive role in the solubility of MHB in mixed systems. Then, four models for five monosolvents (Apelblat, van’t Hoff, λh, NRTL, and the Jouyban model) and three models for mixed solvents [Jouyban–Acree (J–A), van’t Hoff–Jouyban–Acree (V–J–A), and modified Apelblat–Jouyban–Acree (A–J–A) model] were utilized to correlate the mole fraction of MHB. The maximum deviations [relative average deviation (RAD) and root-mean-square deviation (RMSD)] between the experimental data and the solubility data calculated by the models for monosolvents were 7.13% and 6.11 × 10–4 (from the Jouyban model in pure ethyl acetate), respectively. The maximum RAD and RMSD for mixed systems were 1.58% (from the A–J–A model in methanol + water) and 1.35 × 10–4 (from the J–A and A–J–A models in acetone + water), respectively.
研究领域:
化学工程
·
药物化学
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DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Pingping Wu,Xuegang Hao,Yuanyuan Shang,Junchao Liu
Azobenzene, a representative photoresponsive liquid crystal, has extensive applications in fields such as bionic robotics, actuators, artificial muscles, motors, and various functional devices. Photoisomerization ( trans-cis isomerization) is the most important mechanism for its photoresponse. Currently, the isomerization of azobenzene mesogens can be measured through UV–vis absorption spectra, NMR techniques or transient grating methods. Visualization of the trans-cis isomerization of azobenzene mesogens still remains a challenge. In this study, a linear relationship is observed between the absorption intensity of azobenzene mesogens and the stopband shift of azobenzene inverse opals (AZOIOs) films during the isomerization process. This phenomenon can be used to determine the isomerization degree of azobenzene mesogens through the switching of the stopband of the AZOIOs film, enabling the visualization of the azobenzene mesogens’s configuration transition. The results of this study are highly significant for the design and fabrication of novel azobenzene devices.
研究领域:
材料科学
·
光学
·
化学
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DOI
高影响因子
MICROELECTRONICS RELIABILITY
·
2022
·
IF 1.418
Zhongwei Wang,Zeming Fang,Hailong Wu,Qianfa Liu,Yuan Li,Li Luo,Ke Wang
The formation of conductive anodic filament (CAF) inside printed circuit boards (PCBs) is one of the major failure modes related to the long-term reliability of electronic devices. In this paper, the relationship between susceptibility to CAF formation and glass fiber/resin interfacial bonding strength of a thermosetting polyphenylene oxide (PPO)/glass fiber composite system was investigated. Laminates with different interfacial bonding strengths were prepared by coating glass fibers with different silane coupling agents. Interlaminar shear strength (ILSS) of the PPO composites with silane-treated glass fibers has been improved by around 30 %, compared to the PPO/glass fiber composite without silane treatment . An accelerated response to CAF susceptibility was realized by substantially reducing the hole wall to hole wall distance of PCB to 5mil and 7 mil. By correlating the test results of interlaminar shear strength , haloing effect and susceptibility to CAF formation, it is confirmed that the CAF resistance of PCBs is positively correlated with the glass fiber/resin interfacial bonding strength.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Lingxin He,Yulu Zhu,Fukai Chu,Wei Cai,Lei Song,Yuan Hu
To solve the increasing serious electromagnetic radiation pollution and limitations of metal-based electromagnetic shielding materials in flexible devices, the polyaniline (PANI) is deposited on the surface of two-dimensional Ti 3 C 2 to obtain the Ti 3 C 2 @PANI hybrid for constructing waterborne polyurethane (WPU) composite. Meanwhile, to address the flame risk of WPU composite, the two-dimensional black phosphorous (BP) is incorporated as a flame retardant to prepare isolated flame-retardant black phosphorous-waterborne polyurethane/Ti 3 C 2 @polyaniline(Q-FBP-WPU/Ti 3 C 2 @PANI) composite with isolated structure. Due to the existence of conductive fillers and the isolated structure, the Q-FBP-WPU/Ti 3 C 2 @PANI composite exhibited the highest electrical conductivity (2.23 S/m) and the electromagnetic shielding effectiveness (EMI SE) of 27.3 dB in the frequency range of 8.2–12.4 GHz (X-band) and retains higher than 20 dB after hundreds of stretching and bending, which completely satisfies the commercial demands. Compared with the composite with a disordered structure, the thermal conductivity of Q-FBP-WPU/Ti 3 C 2 @PANI is increased by 93.3%. The cone test results show that the peak heat release rate, total heat release, total smoke production and total CO production of Q-FBP-WPU/Ti 3 C 2 @PANI is decreased by 46.2%, 16.3%, 21.2% and 15.5% than that of pure WPU, certifying the fire safety of WPU are greatly improved. This work supports a novel and applicable idea for constructing functional electromagnetic shielding materials.
研究领域:
材料科学
·
电化学
·
复合材料工程
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
ZhiLong Han,Han Zhang,Qiang Wu,ShuPing Li,Wei Zhong,RenJie He,ShiJie Cheng,Jia Xie
Silicon-sulfur (Si-S) full cells show significant potential in energy storage due to their high theoretical energy density compared to commercial lithium-ion batteries. Nevertheless, a majority of electrolytes reported for Si-S full cells still cannot meet the requirements of stable long-duration cycling. Herein, we report a high-areal-capacity Si-S full cell consisted with prelithiated SiO, thick Li 2 S-Se 0.05 S 0.95 @pPAN electrode and a trifluorobenzene (F 3 B) modified and diluted high-concentration electrolytes. This novel electrolyte can effectively mitigate the volume expansion of the prelithiated SiO anode and enhance the utilization of active S in the cathode, showing excellent compatibility with electrodes. The assembled Si-S full cell using modified electrolyte displays remarkable cyclability over 100 cycles at 0.1C, exhibiting higher capacity retention (54.0% vs . 17.5%) than the pristine electrolyte without F 3 B. More importantly, a full cell with a thick sulfur cathode (16 mg/cm 2 ) exhibits a superior initial areal capacity of 8.34 mAh/cm 2 and high-capacity retention of 52% after 80 cycles, even at a lean electrolyte condition (2 μL/mg). This work provides guidance for the achievement of high-performance Si-S full cells under lean electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Zhiyou Tan,Shan Wang,Zhuorong Hu,Weilong Chen,Zhencai Qu,Changan Xu,Qian Zhang,Kun Wu,Jun Shi,Mangeng Lu
In this work, we offered a facile strategy to produce lignin microspheres (LMS) with loading of benzotriazole (BTA) inhibitors, which were released as the pH changed. The morphological and compositional characterizations demonstrated that the BTA inhibitors were efficiently encapsulated in the LMS whose load was up to 15.5 wt %. Tests of crossed scratches of coatings indicated that the LMS@BTA/pure waterborne epoxy resin (WEP) had a good self-healing property. By the electrochemical impedance spectroscopy test, the long-term anticorrosion property of LMS@BTA/WEP composites was 1 order of magnitude higher than that of WEP, which indicated that LMS@BTA greatly improved the corrosion resistance. The highly effective anticorrosion should be attributed to the pH-responsive release behavior of BTA from LMS, which actively protected the steel substrate. The enhanced anticorrosion and the controlled release of BTA enlarged the high value-added applications of lignin.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Lei Zhang,Zilong Zhang,Yangyang Lv,Xiqiao Chen,Zhuang Wu,Yaoyi He,Yanhong Zou
Reduced graphene oxide (RGO)/polyaniline (PANI) composite aerogels (GPAs) with uniformly distributed PANI nanosheets were prepared by a facile self-assembly way. The fabricated hybrids present a cross-linked three-dimensional (3D) porous network, and RGO sheets were covered by PANI sheets with controlled content. The unique architecture efficiently reduced agglomeration of RGO and enhanced the conductive loss of the material to incident wave. Specifically, the GPA composite with 50 wt % PANI showed excellent electromagnetic wave absorption capacity; the largest reflection loss (RL) value reached −48 dB with fill loading of only 3%, and the qualified bandwidth (RL ≤ −10 dB) covered the entire Ku band (12–18 GHz). The study is expected to pave the way to prepare wide qualified bandwidth and lightweight graphene-based electromagnetic wave absorption hybrids with controlled microstructure.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
ACS Applied Nano Materials
·
2018
·
IF 0
Lu Shen,Yong Li,Wenjie Zhao,Lijing Miao,Weiping Xie,Huanming Lu,Kui Wang
In order to hold the excellent corrosion resistance of zinc-rich epoxy coatings with reduced zinc content, five types of graphene modified zinc-rich epoxy coatings (G-ZRCs) were prepared. The effect of zinc content on the corrosion protection behaviors of G-ZRCs was investigated using electrochemical impedance spectroscopy (EIS). Open circuit potential (OCP) was also utilized to deepen the understanding of the anticorrosion mechanism of the as-prepared composite coatings. The results confirmed that addition of 0.3 wt % graphene could make the coating with 40 wt % (G-40ZRC) and 55 wt % zinc (G-55ZRC) provide cathodic protection for a short period of time. The EIS and OCP results showed a dominant physical barrier protection mechanism for the coatings without zinc (G-ZRC), while there was a mixed mechanism for G-40ZRC and G-55ZRC and a dominant cathodic protection mechanism for the coatings with 70 and 85 wt % zinc (G-70ZRC and G-85ZRC). Furthermore, the graphene modified zinc-rich coatings and corresponding corrosion products immersed in a 3.5% NaCl solution for 100 days were also characterized, which could further reveal anticorrosion mechanisms of the graphene modified zinc-rich coatings and the passivation effect of polyaniline (PANI).
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 20
·期 1
·153-161
·
IF 2.446
Li Xiaogang,Rao Mumin,Li Weishan
We report a novel composite, sulfur (S) encapsulated in porous carbon nanospheres (PCNS) and coated with conductive polyaniline (PANI) (PCNS-S@PANI), as cathode of lithium–sulfur battery. PCNS is prepared by convenient and controllable hydrothermal synthetic route and loaded with S via chemical deposition and then coated with conductive polyaniline via in situ polymerization under the control of ascorbic acid. The physical and electrochemical performances of the resulting PCNS-S@PANI are investigated by scanning electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption–desorption isotherms, thermogravimetric analysis, electronic conductivity measurement, galvanostatic charge–discharge test, and electrochemical impedance spectroscopy. It is found that PCNS-S@PANI exhibits excellent charge–discharge performances as cathode of lithium–sulfur battery: delivering a discharge capacity of 881 mAh g −1 at 0.2 C (1 C = 1672 mA g −1 ) with a capacity retention of 72 % after 100 cycles and a rate capacity of 324 mAh g −1 at 2 C. These natures can be attributed to the co-contribution of PCNS and conductive PANI to the improvement in electronic conductivity and chemical stability of sulfur cathode.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
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DOI
高影响因子
Progress in Natural Science-Materials International
·
2018
·Vol. 28
·期 4
·529-533
·
IF 2.572
Zhenmin Ding,Yufei Ma,Dandan Peng,Lu Zhang,Yumeng Zhao,Yuan Li,Shumin Han
In this work, LiBH 4 –20 wt% PP composite was prepared by ball-milling with as-synthesized hierarchical pyrolysis polyaniline (PP) and LiBH 4 , and the hydrogen sorption performance as well as catalytic mechanism of the composite was studied. It is found that the onset desorption temperature of the composite decreases to 75 °C, almost 235 °C lower than that of the milled LiBH 4 . Moreover, the composite could release 4.1 wt% H 2 and rehydrogenate a total of 4.4 wt% H 2 when the temperature raiseds up to 400 °C, showing an outstanding reversibility, which even 3.9 wt% H 2 can be kept after five cycles. Through scanning electron microscopy (SEM) observation and X-ray diffraction (XRD) analysis, we found that the PP surface forms some nanoholes after hydrogenation-dehydrogenation cycles, which leads to the confinement of some LiBH 4 in the PP nanoporous structure, therefore, the hydrogen sorption kinetics and reversibility are significantly enhanced. In addition, we also found the oxygenic groups of the PP can react with LiBH 4 forming LiBO 2 and Li 3 BO 3 , where the containing Li–B–O bonds loaded in the porous structure of the PP catalyze the hydrogenation reaction of LiBH 4 .
研究领域:
材料科学
·
能源化学
·
纳米材料
·
固态储氢
·
催化化学
✓ 已验证
DOI
高影响因子
TALANTA
·
2013
·
IF 3.498
Yingying Fan,Shuhui Liu,Qilong Xie
A very simple, fast and environmentally friendly sample extraction method was proposed for the analysis of phthalate esters (PAEs, di-isobutyl phthalate (DIBP), dibutylphthalate (DBP), butylbenzylphthalate (BBP) and bis(2-ethylhexyl)phthalate (DEHP)) in alcoholic beverages by using conventional ionic liquid dispersive liquid–liquid microextraction. The samples were extracted by 160 μL 1-octyl-3-methylimidazolium hexafluorophosphate in the presence of appropriate amount of ethanol and 10% (w/v) sodium chloride solution; the enriched analytes in sedimented phases were analyzed by high performance liquid chromatography-diode array detector (HPLC-DAD). Under the optimum conditions, a satisfactory linearity (in the range of 0.02–1 μg mL −1 for white spirits and 0.01–0.5 μg mL −1 for red wines with the correlation coefficients ( r ) varying from 0.9983 to 1), acceptable recovery rates (88.5–103.5% for white spirits and 91.6–104.6% for red wines), good repeatability (RSD≤8.0%) and low detection limits (3.1–4.2 ng mL −1 for white spirits and 1.5–2.2 ng mL −1 for red wines) were obtained. The developed method was successfully applied for the determination of the four PAEs in 30 white spirits and 11 red wines collected locally, and the DBP content in 63% (19:30) white spirits exceeded the specific migration limit of 0.3 mg kg −1 established by international regulation.
研究领域:
分析化学
·
食品安全
·
环境化学
·
毒理学
·
色谱技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuxi Yang
In this work, Ni-Zn-doped porous carbon materials (Ni@C) with regular dodecahedral morphologies were synthesized by calcination of Ni-doped ZIF-8 as a template, and applied in electrochemical sensing and quantitative electrochemical sensors to detect Hydroquinone (HQ), The uniformly dispersed Ni in Ni@C serves as the catalytically active material, and the synergistic effect of elemental Zn and porous carbon improves the electron transport efficiency of the material. The developed Ni@C electrochemical sensor detected HQ alone with a sensitivity of 180 μA μM -1 cm -2 and a linear range of 9.1 nM-80 μM. The results demonstrate that the enzyme-free electrochemical sensor based on Ni@C/GCE exhibits good sensitivity, a wide linear range and excellent selectivity. At the same time, the problem of the general conductivity of metal-organic framework (MOF) materials is solved, which provides a new idea for the application of such new materials in the direction of electrochemistry.
研究领域:
分析化学
·
材料科学
·
电化学
·
生物医学工程
·
环境监测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）