POLYMER COMPOSITES
·
2025
·
IF 4.7
Ziyi Zhang,Ziqing Gong,Zhoukai Zheng,Jing Zuo,Qingting Liu,Shengfei Hu
The construction of 3D networks enhanced filler utilization in conductive composites, but heat-induced liquefaction of solid epoxy resins hindered internal 3D structure formation. This study prepared semi-cured epoxy particles (S-E12-RGs) by mixing and pre-curing E12 epoxy with a curing agent. S-E12-RGs were combined with liquid epoxy E51, curing additives, and ethylenediamine-modified nickel-coated graphite (ENCG), and then hot-pressed into 3D composites. The crosslinking of S-E12-RGs prevented ENCG's inward migration, which promoted its selective dispersion in the E51 phase. With only 15 wt% nickel-coated graphite (NCG), the conductivity increased by 7 orders of magnitude compared to direct filling. At 25 wt% ENCG, the composites achieved a conductivity of 23.81 S/m, a thermal conductivity of 0.557 W/(m K), and an EMI shielding of 35 dB. Furthermore, DMA-digital multimeter analysis showed that ΔR/R 0 was less than 0.27 from 35 to 70°C at 0.1–50 Hz, which demonstrated excellent operational stability. Highlights A 3D network was formed in the thermosetting matrix via specific methods. The cross-linked S-E12-RGs promoted ENCG's selective dispersion in the E51 phase. The composite exhibited high electrical conductivity at low filler content. The material maintained stability within a specific temperature and frequency range.
研究领域:
材料科学
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电气工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shengli Zhang,Wei Li,Menglin Li,Tong Lin,Kai Su,Hongwei Yang,Junmin Chen
In the present study, a novel PEI-modified Juncus effuses (PEI-JE) adsorbent was prepared based on the natural 3D network structure of JE via a simple and environmental-friendly method with the help of the ethanol/aqueous solution. SEM, EDS, ATR-FTIR and XPS were performed to reveal the physical and chemical structure of the PEI-JE. The Cr(VI) removal by the PEI-JE was investigated by bath adsorption experiments. Results showed that the developed PEI-JE exhibited the same 3D network structure as the JE, which not only was easy to separate from aqueous solution but also can expose more active sites and facilitate mass transfer. The optimal pH for Cr(VI) adsorption on the PEI-JE was 3, and adsorption equilibrium time was related to initial Cr(VI) concentrations. The adsorption kinetic obeyed pseudo-second-order kinetic model, and the adsorption isotherm showed the best fit with Freundlich model. The calculated maximum adsorption capacity was 268.93 mg/g at 25℃. Coexisting ions including Na + , K + , Al 3+ , H 2 PO 4 − , Cl − , NO 3 – had no remarkable effect on Cr(VI) adsorption, but the presence of SO 4 2− , HCO 3 – and CO 3 2– caused the efficiency losses of 10.9%, 41% and 66%, respectively. After 10 cycles of adsorption/desorption, Cr(VI) removal rate on the PEI-JE almost kept unchanged, demonstrating that the PEI-JE possessed good reusability. Mechanism study suggested that Cr(VI) removal was involved in a three-step reaction, namely electrostatic adsorption, redox and complexation. Film diffusion was the rate-limiting step and chemical adsorption was the main mechanism. The Cr(VI) adsorbed on the PEI-JE surface was completely reduced to Cr(III), demonstrating that PEI-JE is useful for Cr (VI) removal and detoxification.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Yang He,Hejia Li,Shikang Huo,Yazhou Chen,Yunfeng Zhang,Yaying Wang,Weiwei Cai,Danli Zeng,Chen Li,Hansong Cheng
Enabling high ion conductivity, lithium-ion transference number ( t L i + ) and excellent interfacial compatibility of polymer electrolyte with lithium metal anode/cathode plays a vital role in surmounting the challenges of uncontrollable lithium (Li) dendrite and low energy density of Li metal batteries (LMBs). In this contribution, a highly porous three-dimensional (3D) semi-interpenetrated polymer networks (semi-IPNs) based single ion conducting electrospun fiber-gel composite polymer electrolyte ( es -FGPE) is prepared by thermal-initiated in situ polymerization of the pentaerythritol tetra-acrylate (PETEA) units in a single ion conducting polymer electrospun nano fiber SPCE membrane ( es -SIPE) inside the batteries . The as-fabricated es -FGPE assembled LiFePO 4 (LFP)/Li metal batteries demonstrates a high C-rate discharge capacity and an outstanding cyclability with a capacity retention of 82.5% after 1000 cycles at 1C (1 = 170 mA g −1 ). It is noted that in situ polymerization of the semi-IPNs inside the batteries can afford to a multifunctional breakthrough of enhancing ionic conductivity , reinforcing lithium anode and LFP cathode interfaces. We believe that the present semi-IPNs highlight the significance of the enhancement of the interfacial properties of both a cathode and a Li metal anode for achieving real application of lithium metal anode .
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 41
·34685-34691
·
IF 3.289
Huiwen He,Si Chen,Jun Bai,Haiming Zheng,Bozhen Wu,Meng Ma,Yanqin Shi,Xu Wang
Novel types of transparent PMMA composites were toughened with 3D loofah-like gel networks obtained via the in situ polymerization of methyl methacrylate (MMA) gel with POSS-based supramolecular POSS-Lys(BOC) gelators that have excellent compatibility with the polymerized matrix for the nanoscale nature of supramolecular gel fibers. The “gel networks-energy dissipation” toughening mechanism was investigated using SEM, tensile testing and DMA, the results of which demonstrate that a favorable architecture formed by the gel nanofibres through hydrogen bonding interactions contributes to the toughness improvement in these nanocomposites. In particular, UV-Vis spectrometry and haze meter tests indicate that the PMMA nanocomposites maintain the advantage of good optical transparency. In addition, the physical self-assembly nature of the gel networks allows them to be easily extracted from the polymer matrix, the result of which clearly demonstrates the framework formed by the nanofibres has not only been retained during the in situ polymerization process, but also has an outstanding capacity for the dissipation of energy. As a result, a special type of nanoporous materials with stable pore shapes was obtained, which has potential applications in optical sensors, energy storage and as a Li-ion battery separator.
研究领域:
材料科学
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高分子化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2023
·
IF 3.2
Dejian Cheng,Peilong Ni,Denglin Qin,Yuanfa Guo,Siquan Cai,Yuqi Liu,Taoying Rao,Yujie Li,Chaoyang Wang
A binder with strong bonding and 3D network is proven to be beneficial for the electrochemical performance of silicon anode material . Herein, a water-soluble binder with strong adhesion and 3D conductive structure is prepared by a one-pot method. The polymer consists of acrylic acid (AA), acrylamide (AM), and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) forming a terpolymer (PtA), which is grafted to polyvinyl alcohol (PVA) chains to construct a strong hydrogen bonding 3D conductive network structure (PtA/PVA). The polar groups (-COOH and -CONH 2 ) provide strong hydrogen bonding and intermolecular forces for adhesion, while the introduction of lithium salts and sulfonic acid groups provides fast channels for ion transport. In addition, the PVA links with abundant hydroxyl groups , conferring excellent electrochemical performance of silicon/graphite (Si@C 400) composite anodes. As a result, the Si@C 400 anode with the PtA/PVA binder has a reversible capacity of up to 329.8 mAh g −1 at 0.1C, and it shows a prolonged cycle life of 82.0% after 500 cycles at 0.5C. This study provides a promising strategy to design binder for silicon anodes with enhanced electrochemical properties .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Yan Zhang,Lu Zhang,Chenxing Li,Jingxuan Han,Wenwei Huang,Jiayi Zhou,Yongqiang Yang
Dopamine (DA) detection is essential for diagnosis and evaluation of diseases such as Parkinson’s, Alzheimer and schizophrenia. However, conventional electrochemical sensors are vulnerable to biofouling in complex biological fluids, which leads to significant decrease in sensor performance. Ti 3 C 2 T x MXene, a novel 2D material with excellent conductivity and hydrophilicity, is a potential antifouling material for electrodes. But oxidation can strongly influence the performance of MXene. In this work, an antifouling electrochemical sensor for DA detection was fabricated by combining MXene and holey graphene (HG). Multilayer MXene (M−MXene) and single-layer MXene (S-MXene) were combined with HG to form a 3D porous network. HG not only prevented the restacking of MXene but it also improved the stability of MXene. Owing to the excellent conductivity and large surface area, S-MXene/HG modified electrode had a fast electron transfer and excellent electrocatalytic activity for DA compared with M−MXene/HG. Furthermore, S-MXene/HG possessed higher surface hydrophilicity and enhanced biofouling resistance than M−MXene/HG and HG modified electrode. S-MXene sensor displayed excellent analytical performance for DA and antifouling ability in complex fluids. It offers new promising possibilities for its clinical application.
研究领域:
生物医学工程
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 2
·140
·
IF 2.8
Ma Di,He Hao,Huang Xinglan,Wang Jingcheng,Hu Xuebu
The inhomogeneous plating/stripping of zinc and side reactions originating from the dissolution of the cathode material in water lead to the poor stability of zinc anode, which inevitably limits the practical application of zinc-based aqueous batteries. Therefore, a novel hydrogel electrolyte made of hydroxyethyl cellulose/polyacrylamide (HEC/PAM) with a 3D network-like structure is synthesized by radical polymerization and cross-linking reinforcement. Thanks to the porous crosslinked network and massive hydrophilic groups, the electrolyte has high ion conductivity of 3.17 × 10 –2 S cm −2 and decomposition voltage of 2.6431 V. The ion conductive hydrophilic groups facilitate the interfacial compatibility of the electrode with the electrolyte and stabilize zinc plating/stripping, which suppresses the formation of zinc dendrites. Meanwhile, the hydrogel electrolyte effectively alleviates the dissolution of the positive electrode and the occurrence of side reactions, and subsequently improves the stability of the electrode. As a result, the assembled Zn–Zn symmetric cell with HEC/PAM hydrogel electrolyte is stable without short circuit and rapid increase of overvoltage at 5 mA cm −2 . The polarization voltage of the assembled Zn–Cu half-cell is 59.2 mV and initial coulomb efficiency reaches 94.3%. The assembled Zn–V 2 O 5 ·nH 2 O/CNT full cell delivers an excellent cycling stability of 186.9 mAh g −1 at 0.5 A g −1 after 500 cycles with a high-capacity retention of 92.5% (only 52.1% in aqueous system). The new idea is provided for further development of functional hydrogel electrolytes in zinc-ion batteries.
研究领域:
电化学
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能源材料
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功能高分子
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电池技术
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界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 28
·46503
·
IF 1.901
Shuangquan Lai,Yong Jin,Hanping Li,Xiaopeng Sun,Jiezhou Pan
A simple and effective approach to induce hierarchical self-assembly of Y-shaped amphiphilic triblock polyurethane/poly(acrylic acid) complexes system in aqueous media is reported here. Hydrogen bonding interactions and electrostatic repulsive forces, which can be controlled by regulating the pH condition of complexes solution, were the main driving forces to induce morphological transitions. With the gradual decrease of pH value, a variety of micro-/nanostructures including giant vesicles, small vesicles, multi-layer three-dimensional (3D) porous network structures and “bulk” structures were successively obtained. Among these structures, the micron-scale multi-layer 3D porous network structure formed from block copolymer/homopolymer complexes was rarely reported. Therefore, this research demonstrates that the hierarchical self-assembly of polymers complexes in aqueous media is a viable approach to construct different interesting micro-/nanostructure assemblies, and supplies a new clue for the fabrication of multi-layer 3D porous network structures. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46503.
研究领域:
材料科学
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高分子化学
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纳米技术
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Zhaofeng Zhai,Nan Huang,Bing Yang,Chun Wang,Lusheng Liu,Jianhang Qiu,Dan Shi,Ziyao Yuan,Zhigang Lu,Haozhe Song,Meiqi Zhou,Bin Chen,Xin Jiang
Microstructure engineering has aroused tremendous interest to tailor the electrochemical properties of an sp3/sp2-bonded carbon composite in the chemical sensing field. In this work, the undoped diamond/graphite (D/G) nanoplatelet is controllably synthesized without nitrogen/boron incorporation using microwave plasma chemical vapor deposition. Assisted with high-resolution transmission electron microscopy and conductive atomic force microscopy, it is revealed that the D/G composite is composed of an insulate diamond nanoplatelet stem encapsulated in highly conductive graphite shells. The three-dimensional (3D) conductive graphite edges possess high electrochemical activity, whereas the adjacent inactive diamond core could influence the adsorption of the reactant onto the graphite edges; thus, tunable electrochemical properties from the boron-doped diamond feature to the graphite feature are verified with the thickening of the surrounding graphite shells and the thinning of the diamond stem. Impressively, it is noteworthy that the undoped 3D-networked D/G-8% nanoplatelet film, with a thick diamond stem encased into thin graphite shells (∼4 nm), demonstrates improved electrochemical activity while retaining the advantages of a wide potential window (3.18 V) and low background currents (127.6 μF cm–2) as much as possible, holding great promise in electrochemical sensing fields. The D/G hybridized methodology herein paves a novel route toward designing a nanocarbon electrode with excellent electrochemical properties.
研究领域:
材料科学
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化学传感器领域
·
纳米碳电极设计
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 9
·2200137
·
IF 4.402
Weizhen Li,Xulong Jin,Shulong Wang,Zongze Li,Wenjun Gan
The construction of effective heat transfer routines is becoming more important because of the fast development of modern electronics. However, traditional network templates with fixed size cannot meet the various demands on the shape of products. Herein, a facile construction of a shape-programmable 3D thermal network for epoxy composites is provided from the inspiration of meringue. Driven by the synergistic effect of silicon carbide nanowires (SiCNWs) and boron nitride nanosheets (BNNSs), the thermal conductivity (TC) of BNNSs/SiCNWs/epoxy composites with a 3D network is successfully enhanced to 0.69 W m –1 K –1 at low filler content (2.78 wt%), 3.8 times in comparison with neat epoxy, and the η (TC efficiency of filler) reaches 101. Meanwhile, the mechanical and thermal properties of composites are also enhanced ( E ' from 2.47 GPa (epoxy) to ≈3.50 GPa, T g from 123 to 137 °C at 2.78 wt% BNNSs/SiCNWs content). This method may offer a promising prospect for the application in thermal management fields.
研究领域:
材料科学
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热管理
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复合材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Qi Wang,Yuanyou Peng,Xiwei Ji,Mohammed Kamal Hadi,Shaohu Zhang,Jie Tang,Fen Ran
A series of highly performing ultrafiltration membranes have been recently developed, but it is still a withstanding challenge that the ultrafiltration membrane can retain both high flux and high retention ratio without sacrificing the cycle life. In this paper, we construct a novel conductive 3D network in a 2D layer for polyethersulfone membrane, which is self-assembled by graphene oxide , carbon nanotubes , and polyaniline based on the non-solvent induced phase-inversion separation method. The unique 3D network structure and the distinctive selective layer of polyethersulfone membrane possesses molecule transport channels, double-layer intercepted area, and rigid hybrid structure, which contributes effectively to the small molecule's flux, high molecule's retention, and the membrane cyclic stability. The fabricated ultrafiltration membrane exhibits high retention of solute molecules (over 99%), high flux, and extended life span and stability, due to the improvement in the anti-fouling property. Furthermore, the pseudocapacitance of the conductive polymer polyaniline is used to in-situ monitor the fouling behavior, in order to achieve precise decontamination and prolong the long-term life. The results show that the prepared membrane would have high potential applications in relevant environmental separation processes.
研究领域:
材料科学
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环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Xiangshang Chen,Zhenjie Ma,Xihua Ren,Yue Jia,Huayan Chen,Xiaolong Lu
A novel and efficiently anchored 3-dimensional network extracting membrane (3D-NEM) with a thin functional surface layer comprising extraction carrier Bis(2-ethylhexyl) phosphate (D2EHPA) for nickel extraction was designed and studied in this paper. The active sites on the supporting Polytetrafluoroethylene (PTFE) hydrophilic ultrafiltration membrane were introduced by treating PTFE surface with potassium permanganate. Polydimethylsiloxane (PDMS) and Polymethylhydrosiloxane (PMHS) were applied to prepare a 3D network layer which is tightly anchored to the PTFE surface by introducing a crosslinking agent vinyltriethoxysilane (VTES). The prepared 3D-NEM was characterized by SEM, EDS, ATR-IR, XPS and etc. The influence of preparation parameters of 3D-NEM was studied and compared systematically. The optimum preparation conditions of 3D-NEM were based on a PDMS/PMHS/VTES ratio of 2:1:0.1 and a total polysiloxane concentration of 8 wt%. The operation stability test confirmed the average flux of the 3D-NEM in 72h reached 1871.16 mg·m -2 ·h -1 , and only 14.42% flux declined at the end of operation. The proposed designed 3D network structure produced a 5.5 μm-functional extracting layer which has benefits in both effective fixing of D2EHPA and tight anchor to the supporting surface. This work has dual advantages in improving flux and reducing extractant loss compared to supported liquid membrane (SLM) and polymer inclusion membrane (PIM) processes.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）