Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 3
·629-638
·
IF 5.693
Song Haixiang,Zhang Qiqi,Zhang Yanwei,Wang Yanfei,Zhou Zhongyuan,Zhang Ping,Yuan Bingnan
To study the influences of 3-amino-polyhedral oligomeric silsesquioxane (NH 2 -POSS) on the properties of waterborne polyurethanes (WPU), a series of NH 2 -POSS modified WPUs were synthesized by using polypropylene glycol (PPG-2000, PPG-310), 2,2-dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI), and NH 2 -POSS via a one-pot reaction and a high shear emulsification method. The results showed that when the NH 2 -POSS amount in the WPU/NH 2 -POSS nanoemulsion was 5.73 wt% (WPU2, based on the weight of WPU resin), its viscosity was 2.496 MPa · s and its Zeta potential was 63.7 mV(pH = 6.1), showing lower viscosity and better dispersion stability. The particle size of WPU2 is smaller than that of WPU0, and the polydispersion index (PDI) of WPU2 was decreased from 5.520 to 3.837 indicating a higher crosslinking density. In addition, the thermal stability of WPU/NH 2 -POSS nanoemulsion was increased with the content of NH2-POSS from 0.00 to 13.19%. The water contact angle values for the WPU2 (84.5°) were higher than that of WPU0 (80.2°), showing an improvement of the hydrophobic properties. This WPU/NH2-POSS nanocomposites can be used for making coating adhesive for textile and hosting matrix for making multifunctional nanocomposites. Graphical abstract
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高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 14
·5336-5343
·
IF 6.482
Shuyuan Li,Zhongyuan Huang,Yinguo Xiao,Chunwen Sun
Solid-state electrolytes (SSEs) are expected to replace liquid electrolytes in lithium metal batteries (LMBs) with good safety and mechanical strength. However, the existing problems of the Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte, like its poor contact with electrodes, serious side reactions and low ionic conductivity, limit its practical application. In this work, a chlorine (Cl)-doped LATP electrolyte showing a high ionic conductivity of 0.423 mS cm−1 was successfully synthesized. Neutron powder diffraction (NPD) results reveal that the change of the Li+ coordination environment after Cl doping has an effect on the ion diffusion path in the bulk LATP. The fabricated Li symmetric battery with the Cl-doped LATP exhibits long-term compatibility and electrochemical stability against the lithium metal anode. The enhanced performance may be attributed to the in situ formed stable solid electrolyte interphase (SEI) layer. Meanwhile, compared to the LATP electrolyte, the Li|LiFePO4 (LFP) full battery with Cl-doped LATP as an electrolyte has an improved rate performance and cycling performance. This work demonstrates that Cl doping may be an effective approach for improving the performance of the LATP electrolyte.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Zhiyong Bai,Lehui Liu,Zhoubin Lin,Kang Min Ok
A novel guanidinium-templated ultraviolet (UV) nonlinear optical zinc carbonate crystal, [C(NH2)3]2Zn(CO3)2 (GZCO), has been synthesized in a closed system at low temperatures. GZCO crystallizing in the tetragonal noncentrosymmetric nonpolar space group, P41212 exhibits a three-dimensional anionic framework constructed by interconnected [Zn6C6O32] 12-membered ring channels with inorganic CO3 triangles and ZnO4 tetrahedra. Notably, the anhydrous GZCO shows a very high thermal stability among guanidine-based hybrid NLO materials benefiting from the confinement effect of the organic cations within inorganic channels. The UV–visible transmittance spectrum reveals that GZCO has a short UV cutoff edge of 210 nm, corresponding to the large band gap of 5.9 eV. GZCO exhibits a mild second-harmonic generation efficiency of 0.5 × KH2PO4 with type-I phase-matching behavior.
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高影响因子
Energy Storage Materials
·
2019
·
IF 0
Jian Zhang,Xudong Zhao,Yuzhu Song,Qiang Li,Yongchang Liu,Jun Chen,Xianran Xing
Na 3 V 2 (PO 4 ) 3 is one of the most promising cathodes for sodium-ion batteries (SIBs) due to its three-dimensional framework. To meet practical feasibility, the substitution of vanadium with low-cost active elements is urgent. Here the Na + superionic conductor (NASICON)-type Na 3.5 Mn 0.5 V 1.5 (PO 4 ) 3 nanoparticles homogeneously embedded in porous carbon matrix are prepared and investigated as a novel cathode for SIBs. The as-prepared Na 3.5 Mn 0.5 V 1.5 (PO 4 ) 3 /C could deliver a desirable average discharge potential of 3.43 V vs. Na + /Na with fascinating rate capability of 92.7 mA h g −1 at 60C and impressive capacity retention of 87.2% after 4000 cycles at 20C. In situ X-ray diffraction reveals that the electrochemical process undergoes highly reversible biphasic transition and single phase change with a relatively small volume change (8.21%), ensuring the high structural stability and excellent cyclic capability. The reversible evolution of Mn 2+/3+ and V 3+/4+ redox couples upon Na + extraction/insertion has been revealed by the confirmation of valence state via both ex situ X-ray absorption near-edge structure spectra and X-ray photoelectron spectroscopy. The superior performance of Na 3.5 Mn 0.5 V 1.5 (PO 4 ) 3 could be attributed to the high electronic/ionic conductivity and low sodium-ion diffusion energy barrier, which is supported by the electrochemical impedance spectroscopy and cyclic voltammetry measurements, as well as density functional theory computations.
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Journal of Saudi Chemical Society
·
2022
·
IF 4.712
Zeping Wang,Binjie Hu,George Zheng Chen
A hydrophobic ionic liquid (1-octyl-3-methylimidazolium hexafluorophosphate, C 8 mimPF 6 ) with a function of inhibiting corrosion was encapsulated at different concentrations in the copolymer of poly (methyl methacrylate) and poly (butyl acrylate) through miniemulsion polymerization. These latexes were coated on steel samples whose corrosion properties were evaluated by electrochemical techniques. It was found that increasing the C 8 mimPF 6 concentration from 0 wt% to 30 wt%, the corrosion inhibition efficiency was remarkably improved from 41% to 89% based on the charge transfer resistance and from 64% to 87% based on the corrosion current density, respectively. The ionic liquid did not attend the reaction during latex preparation but behaved as corrosion inhibitors on the steel surface. Such an anticorrosion effect could be ascribed to the physical adsorption of the C 8 mim + cation on the reaction sites and the hydrophobicity enhancement resulting from the hydrophobic PF 6 − anion.
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高影响因子
JOURNAL OF HETEROCYCLIC CHEMISTRY
·
2013
·Vol. 51
·期 4
·1210-1214
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IF 1.224
Pei Chen,Yan Li,Xinbing Chen,Zhongwei An,Yiwei Xu,Xiaojun He
A convenient one-pot microwave-assisted synthesis of Benzopyrano[2,3- c ]pyrazol-3-one derivatives was developed, where Knoevenagel condensation and hydrazinolysis reactions were continuously performed under microwave irradiation without separation and purification of the intermediates until the last cyclocondensation reaction except the substrates addition. The one-pot procedure exhibited shorter reaction times and higher yields (25–55%) of the objects than the conventional heating method.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 23
·47630
·
IF 2.188
Liang Wang,Wei Wu,Dietmar Drummer,Renbo Ma,Zhaowen Liu,Wanting Shen
To develop thermally conductive PA6 composites with the aim of decreasing filler content, structure-complexed fillers were fabricated. This research presented an effective approach by noncovalent functionalization of poly(dopamine) (PDA) followed by silver nanoparticles decoration to fabricate 3-dimensional (3-D) structured boron nitride hybrids (BN@PDA@AgNPs). BN hybrids were then introduced into PA6 to prepare thermally conductive PA6 composites. The results demonstrated that PA6/BN hybrids (PMB) composites exhibited higher thermal conducivity compared with PA6/BN composites, which revealed more effective construction of thermal conductive network in the composites with the addition of 3-D structured fillers. The effects of BN hybrids with different loadings on thermal stability, mechanical property, as well as electrical resistance of the composites were also analyzed. Overall, the prepared PMB composites exhibited outstanding performance in thermal conductivity, thermal stability, mechanical property, while retaining good electrical insulating property, which showed a potential application in electronic packaging fields. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47630.
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高影响因子
MATERIALS TECHNOLOGY
·
2018
·
IF 1.232
Binggong Yan,Lei Kang,Masashi Kotobuki,Fei Wang,Xiaodi Huang,Xuan Song,Kaiyong Jiang
NASICON-structured Li1.5Al0.5Ge1.5(PO4)3 (LAGP) has been a promising solid-state glass-ceramic electrolyte for all-solid-state lithium ion batteries. However, the non-ideal ionic conductivity, non-uniformity of chemical composition, distortion and micro-cracks, etc., have limited its practical application. Considering these issues, in this work, we first of all introduce partial substitution of Al3+ by Ga3+. To avoid segregation of secondary phase, microwave sintering technology to prepare LAGP was used. With the help of microwave irradiation, sintering could be finished in just 30 min, and the size of crystals was homogeneous across the cross-section. No distortion and micro-cracks could be identified. Characterisations such as DTA, XRD, SEM and EIS were used to evaluate the material and electrochemical properties of the Li1.5Al0.5-xGaxGe1.5(PO4)3 (x = 0.1 ~ 0.5) samples. A high bulk conductivity of 6.67 × 10−4 S/cm at room temperature has been achieved when x = 0.1 and the activation energy was about 0.66 eV.
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高影响因子
Chinese Journal of Natural Medicines
·
2014
·
IF 0
De-Biao YAN,Dong-Ping ZHANG,Ming LI,Wen-Yuan LIU,Feng FENG,Bin DI,Qing-Long GUO,Ning XIE
To synthesize a series of 3-, 4-, and/or 11-trihydroxy modified bergenin derivatives and evaluated their cytotoxic activity in vitro . The phenolic hydroxyl groups of bergenin were protected by benzyl groups with benzyl bromide. Treatment of dibenzyl bergenin with the corresponding acid in the presence of EDC·HCl and DMAP in CH 2 Cl 2 , followed by hydrogenation over Pd/C catalysts, afforded derivatives of bergenin esters. All of the target compounds were identified by IR, MS, and 1 H NMR. Twenty-six novel and three known derivatives of bergenin esters were synthesized. Their cytotoxicity values were evaluated by the MTT assay on the inhibition of DU-145 and BGC-823 cells in vitro . Several triply-substituted ( 3a, 4a, 5a, 6a, 7a ) and doubly-substituted ( 8b, 9b ) bergenin derivatives exhibited higher cytotoxic activity than bergenin. The result showed that the size of substituents and the lipophilicity of the bergenin esters displayed an important role on their cytotoxic activity.
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PubMed
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Gao-Shang Wang,Hong-Yu Chen,Guang-Xin Feng,Yang Yuan,Zhi-Li Wan,Jian Guo,Jin-Mei Wang,Xiao-Quan Yang
Omega-3 polyunsaturated fatty acids (n-3 FAs) are essential nutrients and are considered effective in improving human health. Recent studies highlight the importance of the combination of n-3 FAs and polyphenols for limiting the oxidation of n-3 FAs and exhibiting synergistic beneficial effects. Herein, we developed a novel formulation technology to prepare oleogels that could be used for the codelivery of n-3 FAs and polyphenols with high loading efficacy and oxidative stability. These oleogels are made from algal oil with polyphenol-enriched whey protein microgel (WPM) particles as gelling agents via simple and scalable ball milling technology. The oxidative status, fatty acid composition, and volatiles of protein oleogels during accelerated storage were systematically assessed by stoichiometry and gas chromatography–mass spectrometry. These results showed that protein oleogels could overcome several challenges associated with the formulation of n-3 oils, including long-term oxidative stability and improved sensory and textural properties. The protein oleogel system could provide an excellent convenience for formulating multiple nutrients and nutraceuticals with integrating health effects, which are expected to be used in the care of highly vulnerable populations, including children, the elderly, and patients.
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PubMed
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 35
·5809-5817
·
IF 3.117
Guangqing Zhang,Maxim S. Molokeev,Qianchao Ma,Xuening Yang,Shuiquan Han,Qi Chen,Binnian Zhong,Bin Ma
Eu3+-Doped Ba3In(PO4)3 was synthesized through a high-temperature solid-phase method. According to the structure refinement based on X-ray diffraction and density functional theory, the crystal and energy band structures of Ba3In(1−x)(PO4)3:xEu3+ were studied and analyzed in detail. The effect of Eu3+ doping concentrations on emission was studied at an excitation wavelength of 393 nm. For the material Ba3In(1−x)(PO4)3:xEu3+(x = 0.01–0.30), the optimal doping level is confirmed to be 0.18. Due to the thermal quenching differences of Eu3+ at the 5D0 and 5D1 energy levels, and based on the temperature-variable fluorescence intensity ratio between emission peaks, the optical temperature measurement performance of this material in the temperature range from 298.15 K to 623.15 K was characterized, and the maximum absolute and relative sensor sensitivities (Sa and Sr) were determined to be 0.1002 K−1 and 4.058%, respectively. With temperature as the only variable, the color of the phosphor changes from red to yellow light with rising temperature. Besides, Sa and Sr values of this phosphor are comparable to other sensing materials. The results indicate that Eu3+-doped Ba3In(PO4)3 phosphors have great potential to be applied in optical temperature sensing.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Daokun Liu,Jinxue Guo,Yanfang Sun,Xiao Zhang
Sodium super-ionic conductor (NASICON) materials are believed as competitive cathodes for sodium-ion batteries, however, their practical application is still prohibited by the limited reversible capacity. In this study, the tri-metal NASICON structured Na 3 Mn 0.5 V 0.5 Ti(PO 4 ) 3 is designed to combine with reduced graphene oxide (NMVTP/rGO) as cathode material . Benefited from the multi-step redox couples of Mn, V, and Ti, NMVTP/rGO realizes high reversible capacity and wide operating voltage. The small sizes of Na 3 Mn 0.5 V 0.5 Ti(PO 4 ) 3 and rGO ensure the fast charge migration. The rGO inhibits the dissolution of electrode material. As a result, NMVTP/rGO exhibits large specific capacity of 284.6 mAh g −1 at 0.1C, high rate performance (170.2 mAh g −1 at 1C and 108.5 mAh g −1 at 5C), and good cyclic stability. This work demonstrates a new insight for designing tri-metal NASICON structured materials with high capacity for sodium-ion batteries.
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高影响因子
危险品化学品经营许可证（带存储）