Journal of Materials Chemistry A
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2023
·Vol. 12
·期 2
·943-949
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IF 11.9
Yalei Wang,Jun Song,Wai-Yeung Wong
Polyaniline (PANI) hydrogels are promising cathode materials for aqueous zinc-ion batteries (AZIBs) due to their inherent porous structure and redox activity. However, the instability during the repeated charge/discharge process limits their application in commercial battery systems. Herein, PANI/MXene hydrogels are synthesized by grafting the negatively charged MXene with the aniline monomer followed by a rapid chemical oxidative polymerization reaction. After combining MXene nanosheets with the PANI chains, the hybrid hydrogels show a three-dimensional (3D) network structure of MXene nanosheets interconnected with PANI chains through hydrogen bond interactions, thus greatly improving the electrochemical reactivity and stability. Moreover, the 3D PANI/MXene network structure can provide fast transport channels for ions and electrons. Consequently, the PANI/MXene cathodes not only achieve a high capacity of 219.0 mA h g−1 at 0.2 A g−1, but also exhibit outstanding rate performance (147.5 mA h g−1 at 5 A g−1), together with excellent long-term cycling stability (over 5000 cycles with a capacity retention of 88.3%). The Zn2+ and CF3SO3− insertion/extraction mechanisms are further revealed by ex situ X-ray photoelectron spectroscopy (XPS) measurements. This work demonstrates the availability of conducting polymer hydrogels as cathode materials for high-performance AZIBs.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
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IF 4.5
Yueqin Li,Xiaohui Liu,Lin Han,Zichun Lu,Lingke Liu
Developing high mass loading of conducting polymers in hydrogels for flexible supercapacitors remains an enormous challenge. Herein, we demonstrate an effective and facile strategy for incorporating high mass-loading of polypyrrole (PPy) nanoparticles into an open porous polydopamine/polyacrylamide (PDA/PAAM) hydrogel substrate. The as-prepared PDA/PAAM/PPy hydrogels exhibit great stretchability and desirable self-healing properties. Taking advantage of the sandwiched configuration and high mass of electroactive PPy (up to 11.13 mg/cm 2 ), the PDA/PAAM/PPy hydrogels could be directly used as all-in-one supercapacitors, which can deliver a superior specific capacitance of 860 mF/cm 2 at 1.0 mA/cm 2 , an excellent energy density of 76.44 μWh/cm 2 , a maximum power density of 4 mW/cm 2 , and excellent capacitance retention of 85 % after 5000 cycles. What’s more, the PDA/PAAM/PPy hydrogels show significant strain-sensitive behavior. A self-powered sensing system integrating the supercapacitor and strain sensor is achieved to monitor various human motions. Therefore, the resultant hydrogels have potential applications in wearable electronics.
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Materials
·
2023
·Vol. 16
·期 21
·7015
·
IF 3.4
Haipei Ge,Yu Liu,Fujuan Liu
In recent years, with the rapid development of the economy and great progress in science and technology, people have become increasingly concerned about their quality of life and physical health. In order to pursue a higher life, various functional and biomimetic textiles have emerged one after another and have been sought after by people. There are many animal and plant surfaces with special wettability in nature, and their unique “micro-nano structures” and low surface energy have attracted extensive attention from researchers. Researchers have prepared various textiles with superhydrophobic features by mimicking these unique structures. This review introduces the typical organisms with superhydrophobicity in nature, using lotus, water strider, and cicada as examples, and describes their morphological features and excellent superhydrophobicity. The theoretical model, commonly used raw materials, and modification technology of superhydrophobic surfaces are analyzed. In addition, the application areas and the current study status of superhydrophobic surfaces for textiles are also summarized. Finally, the development prospects for superhydrophobic textiles based on bionic technology are discussed.Keywords:superhydrophobic surface;biomimetic textiles;lotus leaf;theoretical modeling
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International Journal of Chemical Reactor Engineering
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2023
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IF 1.6
Junxiang Guo,Jianlong Wu,Jirigele Qinggele,Zhixing Zhao,Tongbin Wang,Hongjun Yang,Daqiang Cang
The superoleophobic, superhydrophilic, and flame-retardant coatings were obtained through layer-by-layer (LBL) technology using fly ash (FA) as the core. Chitosan (CS), phytic acid (PA), and fluorosurfactant (FS50) were assembled onto FA by LBL assembly using the principle of electrostatic adsorption. The CS and PA were recycled assembled on FA core for 10 layers, which was further deposited with FS50 molecules as the final layer (marked as FA@CS-PA 10 @FS50). Multifunctional coatings consisted of the FA@CS-PA 10 @FS50 powders and polymer binders were formed and could be used on a variety of substrates of various shape and size. The obtained coatings presented superoleophobicity, superhydrophilicity, and flame retardance. The contact angles (CAs) of coated substrates were all greater than 150° towards various oils (rapeseed oil, diesel, hexadecane, and dodecane), while achieved water CAs as low as 0°. The as-fabricated coatings could efficiently separate different oil/water mixtures and lotions while avoiding pollution of the separated materials. The coatings also achieved superior flame retardance, and the fire was self-extinguished within 13 s. Moreover, it also obtained excellent mechanical durability.
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PROGRESS IN ORGANIC COATINGS
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2023
·
IF 6.6
Qiang Liu,Qing Zeng,Yang Lei,Qingyu Wu,Xiaorong Sun,Bo You,Yaojie Sun,Weidong Ren,Jie Guo
Multifunctional photothermal protective films are novel photothermal-conversion materials that efficiently harvest and utilize solar energy. They also require excellent stability and durability. However, the poor toughness, loose structure, and weak shielding performance of these films limit their applications in photothermal conversion and metal protection. Inspired by the delicate microstructure of nacre , which exhibits excellent strength and barrier protection performance, a coordination-crosslinking self-assembly strategy is proposed herein that realizes a bio-phytic acid–silane–graphene oxide (bio-PSGO) metal-protective film with nacre-mimetic structures. The self-assembled bio-PSGO film exhibits good flexibility, excellent photothermal-conversion efficiency (93.9 %), outstanding protective performance, and water-desalination ability under natural sunlight irradiation. The coordination-crosslinking self-assembly process is simple and spontaneous, and it quickly assembles a complete thin film in an aqueous system. Nacre-like structured bio-PSGO films are easily obtained on the surfaces of metal substrates, such as iron, copper, zinc, magnesium, aluminum , and nickel. Metal ions released from metal materials promote the self-assembly of films via coordination crosslinking with PSGO nanosheets ; meanwhile, the thermally conductive metal materials quickly transfer the heat generated in the photothermal-conversion process, synergistically improving the photothermal efficiency of the system. The proposed strategy designs robust and flexible materials that simulate the lamellar microstructure of nacre, which can be applied in flexible wearable devices and sensors, energy supply, metal protection, seawater desalination, solar thermal de-icing, and aerospace technologies.
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Materials Today Nano
·
2023
·
IF 10.3
Jingwen Wang,Hu Liu,Xiaoyan Yue,Dianbo Zhang,Rui Yin,Hongling Sun,Chuntai Liu,Changyu Shen
With the rapid development of wearable electronics, conductive yarn strain sensors have attracted much attention due to their excellent flexibility, conformability, and knittability. However, it is still a great challenge to prepare flexible conductive yarn strain sensors with high sensitivity and wide working range simultaneously. Here, a large-scale fabrication of conductive spandex yarn (SY) with synergistic conductive coating composed of lower stable carbon nanotubes (CNTs)-polyaniline (PANi) hybrid layer and upper ultrasensitive cracked PANi layer was successfully achieved via the simple solvent swelling , non-solvent-induced phase separation (NIPS), and in-situ reduction processes. Thanks to the synergistic effect of the double layered conductive coating and its tunable microstructure based on the PANi content, the assembled conductive SY strain sensor exhibits wide working range (0–321 %), high sensitivity (GF is 43, 950, and 2439 for strain range of 0–100 %, 170–270 %, and 280–321 %, respectively), ultralow detection limit (0.5 %), fast response/recovery time (140 ms/160 ms), and excellent fatigue resistance (4000 cycles). As a proof of concept, the strain sensor can be used for wearable applications to achieve the effective detection of full-range human motion and physiologic signals. Besides, it also displays great potential in human-computer interaction for reliable operation of remote-control manipulator and flexible electronic textile for spatial pressure distribution identification. Finally, owing to the excellent optical absorbing ability of PANi and CNTs, the conductive SY exhibits high-efficient and stable photothermal conversion capacity even under the stretching and bending states, endowing it with good wearing comfort. This study provides a convenient but effective strategy for the fabrication of high-performance wearable strain sensor with excellent thermal management capacity.
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FUEL
·
2023
·
IF 7.4
Gang Qin,Chunfeng Wu,Xiaoyu Song,Wenjie He,Jia Yang,Xiang Yu,Qiang Chen
Flexible supercapacitors have undergone rapid development, however, there is still a serious challenge in integrating multiple functions into a single supercapacitor. Therefore, higher requirements are put forward for electrolytes and assembled technology. Herein, a redox-mediated physically crosslinked double network polyacrylic acid/polyisodecyl methacrylate/K 3 [Fe(CN) 6 ] gel polymer electrolyte (GPE) has been synthesized. The double network structure and reversible interactions, including hydrophobic association, hydrogen bond and ion coordination, endow the GPE with exceptional strength, toughness and self-healability. In particular, Fe 2+ /Fe 3+ ions play a dual role as charge carriers and crosslinking agents, simultaneously increasing the electrochemical and mechanical capabilities of the GPE (3.76 S/m and 1.99 MPa, respectively). Subsequently, a flexible integrated supercapacitor has been developed through in situ polymerization of aniline on the surface of GPE. Thanks to the seamless construction and reversible redox reactions of Fe 2+ /Fe 3+ , the supercapacitor exhibits significantly enhanced capacitance and energy density (271.6 mF/cm 2 and 98.1 μWh/cm 2 , respectively). Moreover, the supercapacitor demonstrates promising self-healability with a 99.3 % capacitance retention rate after 10 cutting/healing cycles. Due to the mutual fusion of the electrode and electrolyte layers, the outstanding electrochemical durability is obtained even under severe deformations. Overall, the redox-mediated double network GPE and the unique integrated configuration provide an effective strategy for multifunctional energy storage devices.
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ACS Applied Materials & Interfaces
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2023
·
IF 9.5
He Zhang,Yuping Du,Dengwei Jing,Liu Yang,Junyi Ji,Xiaoke Li
Solar-driven interfacial evaporation (SIE) technology has great advantages in seawater desalination. However, during the long-term operation of a solar evaporator, salts can be deposited on the solar absorbing surface, which, in turn, hinders the evaporation process. Therefore, there is an urgent need to propose new antisalt strategies to solve this problem. Here, we present a novel cogeneration system leveraging a salt-tolerant, heterogeneous Janus-structured evaporator (FHJE) for simultaneous solar desalination and thermoelectric generation. The top evaporation layer is composed of a graphene-based photothermal membrane pre-embedded with Fe3+ cations, which enhanced solar absorption and energy conversion abilities. Meanwhile, the Fe3+ cations further contribute to the Donnan effect, effectively repelling salt ions in saltwater. The bottom layer comprises a hydrogel composed of hydrophilic phytic acid (PA) and poly(vinyl alcohol) (PVA), fostering facilitation of water transport. The FHJE was demonstrated to exhibit evaporation rate and efficiency as high as 3.655 kg m–2 h–1 and 94.7% in 10 wt% saltwater, respectively, and superior salt resistance ability without salt accumulation after 8 h of continuous evaporation (15 wt%). Furthermore, a hydropower cogeneration evaporator device was constructed, and it possesses an open-circuit voltage (VOC) and a maximum output power density of up to 143 mV and 1.33 W m–2 under 1 sun, respectively. This study is expected to provide new ideas for comprehensive utilization of solar energy.
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ACS Applied Polymer Materials
·
2023
·
IF 5
Ya Wang,Yuxiao Wang,Ting-Ting Li,Xiaomeng Wang,Hai-Tao Ren,Ching-Wen Lou,Jia-Horng Lin
Self-healing conductivity of materials is a very attractive property, but preparing a simple green conductive material is still a challenge. In this article, a self-healing conductive material was prepared by using polyaniline as a conductive substance with oxidized nanocellulose and polyacrylamide. When the oxidized nanocellulose and polyaniline are 1:1, the fracture stress of the material can reach 1.62 MPa (≈400%). Meanwhile, the material has a certain self-healing effect due to the presence of hydrogen bonding and electrostatic interaction forces. After 48 h of self-healing at room temperature, the maximum stress reached 0.83 MPa. The electrical conductivity can reach 47.22 μS/cm, and the self-healing efficiency of the material can reach >90% after 1 h at room temperature. This material is prepared by a solution casting process, which allows the material to be prepared in large areas.
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PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Fan Zhou,Yanqi Ma,Ying Chen,Li Zhang,Xinxin Sheng
Endowing composite coatings with robust anticorrosion properties for metal substrates in intricate corrosive environments, such as conferring self-healing and antibacterial capabilities through the integration of multifunctional nanofillers, constitutes a pivotal approach in the advancement of efficient anticorrosive coatings. In this study, a triple-functional anticorrosion coating entailed the simultaneous integration of graphene oxide (PG) with antibacterial capability, and BTA@ZIF-8/PM (PZ) with self-healing performance, into a waterborne epoxy (PGZ/WEP). The logarithm of the lowest frequency impedance modulus of PGZ/WEP demonstrated a notable value of 8.2 Ω cm 2 following a 28 days immersion in simulated seawater, indicating an escalation of approximately 2.7 orders of magnitude compared to that the reference of WEP. For the antibacterial capabilities of coatings, an enhanced antibacterial rate ( R ) of up to 55.9 % was observed. Moreover, an in-depth analysis was undertaken to explain the underlying anticorrosion, self-healing, and antibacterial mechanisms of composite coatings. In conclusion, the PGZ/WEP composite coating manifests self-healing, antibacterial, and anticorrosive functionalities, thereby demonstrating exceptional adaptability to intricate corrosion-prone environments.
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ACS Applied Polymer Materials
·
2023
·
IF 5
Yuhang Tang,Shunyu Chen,Xiufeng Xiao
With the rapid development of soft electronics in recent years, the demand for hydrogel materials as a conductive material with a high degree of flexibility, widely adjustable mechanical strength, and a wide range of application scenarios has grown rapidly. In recent years, hydrogels have been reported as flexible strain sensors in application scenarios such as wearable devices, healthcare detection, and electronic skins. However, conventional hydrogels are generally not very tough and mechanically strong and do not adapt well to the environment. In this context, we have designed and synthesized an ion-conductive double-network hydrogel (DN-F/T gel) with a strong interaction between poly(vinyl alcohol) (PVA) and phytic acid (PA) as the first heavy network and a second ionic network consisting of the anionic monomer sodium p-styrenesulfonate (NaSS) copolymerized with the cationic monomer [2-(acryloyloxy)ethyl]trimethylammonium chloride solution (DAC). The hydrogel has a tensile strength of 1.52 MPa at 417% and a toughness of 3.30 MJ m–3. While excellent flexibility and toughness are ensured, the dissipation energy of the hydrogel stabilizes after repeated cycling tests. With the addition of the ionic cross-linked network and phytic acid, the conductivity of the dual-network hydrogel is substantially improved, with stable responsiveness under various strain and cycling tests and good performance as a strain sensor and writing recognition material. It has good swelling resistance in water, with a swelling rate of 63% after 15 days of immersion. This enriches the application prospects for its use in complex scenarios, such as those encountered in underwater sports. These properties all contribute to the durability, stability, and suitability of hydrogel strain sensors.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Qing Yin,Jiali Liu,Zicheng Zhong,Yueyuan Zhang,Feiran Zhang,Mingming Wang
In this study, chitosan (CS) and phytic acid (PA) were employed as raw materials to synthesize a range of chitosan–phytic acid complexes (CP) with different ratios (CS:PA = 12:1, 9:1, 6:1, 3:1, 1:1). The structures and elemental compositions of the compounds were characterized using Fourier-Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS). The thermal stability of the synthesized materials was analyzed using a Thermogravimetric Analyzer (TG). Electrochemical testing was conducted to explore the corrosion inhibition effect of the modified inhibitors with varying ratios on Q235 steel in 3.5 wt% NaCl solution. Additionally, Scanning Electron Microscopy (SEM) was utilized to investigate the surface morphology of the immersed samples. When the CS:PA ratio was 3:1, CP exhibited an impressive corrosion inhibition efficiency of 94.9 %. Furthermore, the antimicrobial properties of CP were evaluated using the colony plate counting method. At a CS:PA ratio of 1:1, CP demonstrated the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) at 0.1250 % and 0.5000 %, respectively. This research introduces a novel green corrosion inhibitor capable of simultaneously reducing the electrochemical corrosion of Q235 while inhibiting biocorrosion, avoiding the antagonistic effects arising from the simultaneous use of biocides and corrosion inhibitors in the system.
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