RSC Advances
·
2021
·Vol. 11
·期 20
·12381-12391
·
IF 3.361
Yang Fu,Hongling Qin,Zhiguang Guo
A superamphiphobic coating is usually prepared via a reduction reaction and then deposited onto the surface of the substrate. This technology is difficult to control and achieve high bond strength, which easily leads to powder shedding. To overcome this issue, electroplating technology is usually preferred for preparing adhesion coatings. However, the coating prepared using this method is usually suitable only for hard steel substrates, and not for soft substrates such as carbon brushes. Herein, we demonstrate an air spray technology for preparing anti-greasy and conductive superamphiphobic graphite-1H,1H,2H,2H-perfluorooctyltrichlorosilane–SiO2 (GPS) coatings suitable for both soft substrates (carbon brushes) and hard substrates (collector rings). The sheet resistance of the coating with 10% graphite content is 4.8 × 10−3 Ω □−1 for a 10 μm thin coating, corresponding to a resistivity of 4.8 μΩ cm. More importantly, the prepared coating has excellent liquid repellency, such as water, rapeseed oil and n-hexane. In addition, the coating has excellent anti-greasy and mechanical properties, which provide a brand-new solution for the greasy pollution in the engineering field. These advantages will enhance the application of superamphiphobic GPS coating in the fields of hydropower, wind power and transportation, and so on.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Chinese Physics B
·
2022
·Vol. 31
·期 6
·066206
·
IF 1.652
Yao Wang,Dan Xu,Shan Gao,Qi Chen,Dayi Zhou,Xin Fan,Xin-Jian Li,Lijie Chang,Yuewen Zhang,Hongan Ma,Xiao-Peng Jia
Pyrite tailings are the main cause of acid mine wastewater. We propose an idea to more effectively use pyrite, and it is modified by exploiting the reducibility of metal represented by Al under high-pressure and high-temperature (HPHT) conditions. Upon increasing the Al addition, the conductivity of pyrite is effectively improved, which is nearly 734 times higher than that of unmodified pyrite at room temperature. First-principles calculations are used to determine the influence of a high pressure on the pyrite lattice. The high pressure increases the thermal stability of pyrite, reduces pyrite to high-conductivity Fe7S8 (pyrrhotite) by Al. Through hardness and density tests the influence of Al addition on the hardness and toughness of samples is explored. Finally we discuss the possibility of using other metal-reducing agents to improve the properties of pyrite.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yuerui Li,Min Guo,Yifei Gao,Chunxia Zhao,Jialin Liao,Yuxing Li,Jinbo Cheng,Hui Li,Dong Xiang,Haoran Huang,Yuanpeng Wu
Hydrogels have become an important material in the field of wearable flexible electronics owing to their excellent flexibility and adjustable conductivity. However, due to the large amount of free water contained within the hydrogel, it freezes in low-temperature environments, resulting in poor conductivity and mechanical properties. In this study, an ionically conductive hydrogel was developed by introducing phytic acid (PA), a biomass-based antifreezing material. The addition of PA improved the mechanical, adhesion, and electrical properties, as well as the frost resistance of the hydrogel. The PAM/PVA0.15/Gelatin0.02/PA4 hydrogel prepared in this study exhibited an ultrahigh tensile strain (3083%), excellent adhesion (with adhesion strength to pig skin up to 448.45 kPa), and high conductivity (10.07 S m–1). At the same time, PA endowed the hydrogel with good frost resistance and long-term environmental stability. The hydrogel could remain soft even at −20 °C, as well as retain good electrical properties. In addition, an integrated hydrogel sensor exhibited a wide strain response range (1–1000%), excellent stability, and high sensitivity. Moreover, hydrogel sensors were also successfully used for motion and pipeline flow rate monitoring, as well as simple human–computer interaction applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Zhao Gao,Xiaoxue Wu,Zhiqiang Qi,Xiangsheng Han,Wenzhu Sun,Hongzhen Cai
Liquid metal (LM)-based conductive hydrogels have attracted considerable attention in wearable technology due to their superior electrical conductivity and excellent biocompatibility. However, developing LM composite hydrogels that simultaneously achieve high sensitivity, long-term durability, and superior mechanical properties remains a challenge for meeting the demands of advanced wearable applications. In this study, we introduce phytic acid (PA), a naturally occurring small molecule, whose unique interfacial stabilization properties arise from the dual functionality of its phosphate groups: (i) the ability to form strong coordination bonds with metal surfaces, and (ii) the enhancement of the polymer network through multiple hydrogen bonds and electrostatic interactions, significantly improving the dispersion stability of LM within the hydrogel matrix. Based on this strategy, we successfully fabricated PLM x hydrogels with superior electrical conductivity (∼0.53 S m −1 ), exceptional toughness (∼9.7 MJ m −3 ), and remarkable durability (>11,000 cycles). The PLM x hydrogel exhibits outstanding sensitivity (gauge factor ∼8.1) and enables wireless dual-mode signal detection—precisely monitoring vigorous human motion and sensitively detecting subtle physiological signals. Notably, even under prolonged use and high-frequency cycling conditions, the PLM x hydrogel maintains excellent signal responsiveness and operational stability, demonstrating its tremendous potential for applications in smart health monitoring, human-machine interfaces, and next-generation wearable devices.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS-CONDENSED MATTER
·
2025
·Vol. 37
·期 15
·155701
·
IF 2.6
Zekun Yu,Chao Zhou,Kuo Bao,Zhaoqing Wang,Pinwen Zhu,Qiang Tao,Tian Cui
The interactions between the carbon skeleton and metal atoms in binary transition metal carbides are of particular interest for industrial applications involving advanced physics and chemistry, especially in magnetoelectric functional materials and cemented carbides. Cr and carbon BTMCs are a series of intermetallic compounds with specific chemical formulas that share certain unique characteristics. In this study, we used polycrystalline powders of chromium and carbon as precursors and synthesised single-phase bulk Cr7C3 (orthorhombic, space group: Pnma) with high density and good crystallinity using a high-temperature and high-pressure quenching method (HTHPQM). We studied the material properties and electronic structures of Cr7C3 with both experimental measurements and density functional theory ab intio simulations and found that Cr7C3 is a conductor with an electrical conductivity (2.32 × 10−3 Ω m), relatively high compaction (97.2%), excellent thermostability (oxidation at 1175 K), and a magnetic phase transition from paramagnetism to soft ferromagnetism around 50 K, and the electromagnetic properties are chiefly due to the abundance of the 3d electrons of Cr, and the orbital hybridisation between C and Cr with their 2p and 3d electrons is the reason for the crystal structure and high thermostability. Therefore, the synthesised Cr7C3 is a multifunctional material with promising application prospects, and HPHTQM is a simple and effective method for preparing samples.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yangyang Gong,Pengtao Zhang,Shuang Fan,Minghui Cai,Jiangtao Hu,Zhaoyan Luo,Hongwei Mi,Xiantao Jiang,Qianling Zhang,Xiangzhong Ren
Ammonium vanadate with stable bi-layered structure and superior mass-specific capacity have emerged as competitive cathode materials for aqueous rechargeable zinc-ion batteries (AZIBs). Nevertheless, fragile N H…O bonds and too strong electrostatic interaction by virtue of excessive NH 4 + will lead to sluggish Zn 2+ ion mobility, further largely affects the electro-chemical performance of ammonium vanadate in AZIBs. The present work incorporates polypyrrole (PPy) to partially replace NH 4 + in NH 4 V 4 O 10 (NVO), resulting in the significantly enlarged interlayers (from 10.1 to 11.9 Å), remarkable electronic conductivity, increased oxygen vacancies and reinforced layered structure. The partial removal of NH 4 + will alleviate the irreversible deammoniation to protect the laminate structures from collapse during ion insertion/extraction. The expanded interlayer spacing and the increased oxygen vacancies by the virtue of the introduction of polypyrrole improve the ionic diffusion, enabling exceptional rate performance of NH 4 V 4 O 10 . As expected, the resulting polypyrrole intercalated ammonium vanadate (NVOY) presents a superior discharge capacity of 431.9 mAh g −1 at 0.5 A g −1 and remarkable cycling stability of 219.1 mAh g −1 at 20 A g −1 with 78 % capacity retention after 1500 cycles. The in-situ electrochemical impedance spectroscopy (EIS), in-situ X-ray diffraction (XRD), ex-situ X-ray photoelectron spectroscopy (XPS) and ex-situ high resolution transmission electron microscopy (HR-TEM) analysis investigate a highly reversible intercalation Zn-storage mechanism, and the enhanced the redox kinetics are related to the combined effect of interlayer regulation, high electronic conductivity and oxygen defect engineering by partial substitution NH 4 + of PPy incorporation.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 19
·9797-9805
·
IF 11.301
Junhui Tang,Ruisi Chen,Lidong Chen,Guillermo C. Bazan,Ziqi Liang
n-Type semiconducting polymers bearing high Seebeck coefficients (S) have been seldom employed in organic–inorganic thermoelectric nanocomposites (TENCs). Herein we illustrate how to exploit an n-type semiconducting polymer to fabricate TENCs comprising N2200 and metallic Co NWs, in which N2200 contributes significantly to the S of the TENCs. The TENCs exhibit a highest power factor (PF) of 288 μW m−1 K−2 at 80 wt% Co NWs. At a greater Co NW content, the organic/inorganic inter-connectivity deteriorates, owing to the rigid molecular chains of N2200, retarding the increase of electrical conductivity (σ) and also undermining the mechanical flexibility. Flexible n-type doped SWCNTs were therefore added to introduce additional conductive paths. At an optimal amount of SWCNTs (2 wt%), the σ increases to 1860 S cm−1, whereas S remains at approximately −45 μV K−1 and the bendability is improved. The maximal PF and zT values of the resulting ternary TENC reach 483 μW m−1 K−2 and 0.18 at 380 K, respectively. By pairing with p-type PEDOT:PSS/SWCNT thin films, the 6-legged flexible TEG yields maximum output voltage and power of 9.80 mV and 3.72 μW, respectively, when ΔT = 50 K. This work manifests a new avenue to both highly efficient and bendable thermoelectric materials through the judicious choice of multiple blend components.
研究领域:
材料科学
·
能源技术
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Weijun Deng,Fucheng Wei,Jing Hu
In many animals, tough skeletal muscle contraction occurs, producing a strong force through myofilaments attaching to and sliding on fibrous actin filaments. In contrast, the strength of typical synthetic hydrogels is facilitated mainly by polymeric chains. We propose a strategy for developing strong and tough hydrogels in which the side groups on polymeric chains strongly interact with dispersing medium. The hydrogels are fabricated with a polyacrylamide–alginate double network in a choline chloride saturated solution. The hydrogels are not only highly transparent, tough, fatigue-resistant, self-recovering, self-healing, and adhesive but also water-retentive, antifreezing, and conductive. The hydrogels are strengthened by hydrogen bonds in dispersing medium with a clathrate framework structure. This work may inspire the development of tough and conductive gels for applications of e-skins, soft robots, and intelligent devices.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 41
·19360-19366
·
IF 7.233
Shengping Dai,Xiaoshuang Zhou,Shuai Wang,Jianning Ding,Ningyi Yuan
Self-healing conductive elastomers have emerged as a class of novel materials that are important for fabricating human-motion sensors, soft robots and healthcare monitoring systems. Herein, we report on a hydrogel of modified poly(γ-glutamic) acid polymer chains crosslinked by coordination complexes, which exhibits good stretchability (1375%), long-term stability (more than 40 days), and self-healing ability (99.0 ± 1.5% in 3 h). Furthermore, a “sandwich” structure composite was fabricated, which is composed of self-healing hydrogels and Au nanograin-decorated aligned multiwall carbon nanotube sheets. It possesses fast self-healing ability, a low stable electronic resistance of 10 ± 1 Ω sq−1, in the temperature range of −40–90 °C, the humidity range of 10–90%, and a stretching range up to 200%.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
·
2018
·
IF 2.127
Jingang Xie,Mengmeng Song,Heqing Fu
First, silanized carbon fiber (SCF) was synthesized, then silanized carbon fiber–silver (SCF-S) was obtained. Finally, silanized carbon fiber–silver–acrylate (SCF-S-A) electrical conductive and antibacterial composites were prepared. The structures of CF, SCF, SCF-S, and SCF-S-A were characterized by X-ray photoelectron spectroscopy, FTIR, scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and UV spectra. The electrical conductive and antibacterial properties of SCF-S-A nanocomposites were studied. The results showed that electrical conductive and antibacterial activity properties of SCF-S-A nanocomposites were improved. When the content of SCF-S was 50%, the conductivity of SCF-S-A nanocomposites was maximum. The SCF-S-A nanocomposites will have promising application in high-performance electrical conductive and antibacterial materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2021
·
IF 3.314
Zhiqiang Lai,Tao Zhao,Pengli Zhu,Dan Liu,Xianwen Liang,Rong Sun
Recently, improving the reliability of silver nanowire (AgNW) has become an interesting topic for promoting working performance and service life of portable electronic devices. In this work, flexible, transparent, and highly conductive AgNW-based films are fabricated by electroplating Cu, Co, or Ni on polyethylene terephthalate. The AgNW network deposited by metal shell (Metal@AgNW) via electroplating exhibits improved conductivity with acceptable transmittance. The Metal@AgNW effectively enhances the chemical reliability of AgNW concerning the electrochemical migration and the UV degradation of Ag, maintaining a superior mechanical property. For the sulfurizing degradation of AgNW, only Ni@AgNW holds a relatively strong resistance. In addition, a high electromagnetic interference (EMI) shielding effectiveness (SE) up to 30 dB of Metal@AgNW with a good stability in the frequency range of 8.2–12.5 GHz is obtained, which is higher than that of pristine AgNW network. Theoretical calculations in combination with the corresponding experiments are employed to investigate the mechanism of electroplating Cu, Co, or Ni on AgNW. As a result, electroplated Ni on AgNW is the densest and most reliable coating in comparison to other metals due to the relatively strong interaction between electroplated Ni particles and the Ag surface. Therefore, electroplating Ni on AgNW is the preferred approach to obtain flexible, transparent, and high-conductivity films with superior reliability.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·490
·
IF 3.4
Guangwan Zhang,Chunhua Han,Kang Han,Jinshuai Liu,Jinghui Chen,Haokai Wang,Lei Zhang,Xuanpeng Wang
Sodium-ion batteries (SIBs) are considered a potential replacement for lithium-ion batteries in the area of low-cost large-scale energy storage. Due to its low operating voltage, high capacity, non-toxicity and low production cost, titanium dioxide is now among the anode materials under investigation and shows the most promise. However, its poor electrical conductivity is one of the main reasons limiting its large-scale application. Herein, we designed a ruthenium-doped anatase-type VTi2.6O7.2ultrafine nanocrystal (Ru-VTO). As the anode of SIBs, Ru-VTO delivers a high specific capacity of 297 mAh g−1at 50 mA g−1, a long cycle life of 2000 cycles and a high rate capability (104 mAh g−1at 1000 mA g−1). The excellent performance may be related to the solid-solution interatomic interactions and the enhanced conductivity after ruthenium doping. These studies demonstrate the potential of Ru-VTO as an anode material for advanced SIBs.Keywords:titanium-based material;ru doping;high conductivity;anode;sodium-ion battery
研究领域:
材料科学
·
电化学
·
能量存储
✓ 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）