COMPOSITES SCIENCE AND TECHNOLOGY
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2024
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IF 8.3
Yue Qiao,Hang Jia,Yu Zhang,Wenqi Zhao,Enmao Zhang,Shouhai Zhang,Xigao Jian,Cheng Liu
The mechanical properties of carbon fiber (CF) reinforced high-performance thermoplastic composites are significantly compromised due to inadequate interface bonding between CF and matrix. In this study, electrochemical polymerization techniques were employed to modify CFs with polypyrrole (PPy), poly-aniline (PANI), and poly- o -phenylenediamine (PoPd), to systematically investigate the impact of conjugated polymers on the interfacial properties of CF/copoly (phthalazinone ether sulfone ketone)s (PPESK) composites through a combination of experimental and molecular dynamics (MD) approaches. The findings revealed distinct differences among these conjugated polymers in terms of their effects on both IFSS and ILSS for CF/PPESK composites. Among all tested laminates, PoPd@CF-60s/PPESK exhibited the highest IFSS, ILSS and flexural strength values of 39.8 MPa, 75.6 MPa, and 1494 MPa, respectively, 94.1 %, 20.6 %, and 47.6 % higher than those of CF-desized/PPESK, without compromising CFs strength and thermal resistance of CF/PPESK composites. MD simulations combined with fracture morphology analysis confirmed that compatibility between conjugated polymers and matrix played a pivotal role in enhancing interface properties for CF/PPESK composites. Furthermore, the AFM outcomes demonstrated that the PoPd layer could serve as the modulus transition layer between the CF phase and the PPESK phase, which effectively enhancing the load transfer efficiency between the two phases under external forces. To summarize, this work presents a straightforward yet non-destructive approach that effectively enhances the interface strength within advanced CF reinforced high performance thermoplastic polymer composites (CFRHPTPs).
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Panpan Li,Xinyu Jia,Zhaolong Sun,Jinglong Tang,Quan Ji,Xiaomei Ma
To develop ecofriendly multifunctional gel materials for sustainable flexible electronic devices, composite organohydrogels of gellan gum (GG) and polypyrrole (PPy) with an interpenetrating network structure (IPN-GG/PPy organohydrogels) were developed first time, through fabrication of GG organohydrogels followed by in-situ oxidation polymerization of pyrrole inside. Combination of water with glycerol can not only impart environment-stability to GG hydrogels but promote the mechanics remarkably, with the compressive strength amplified by 1250 % from 0.02 to 0.27 MPa. Incorporation of PPy confers electrical conductivity to the GG organohydrogel as well as promoting the mechanical performance further. The maximum conductivity of the IPN-GG/PPy organohydrogels reached 1.2 mS/cm at 25 °C, and retained at 0.6 mS/cm under −20 °C and 0.56 mS/cm after 7 days' exposure in 25 °C and 60 % RH. The compression strength of that with the maximum conductivity increases by 170 % from 0.27 to 0.73 MPa. The excellent conductivity and mechanical properties endow the IPN-GG/PPy organohydrogels good piezoresistive strain/pressure sensing behavior. Moreover, the thermo-reversible GG network bestows them shape-memory capability. The multifunctionality and intrinsic eco-friendliness is favorable for sustainable application in fields such as flexible electronics, soft robotics and artificial intelligence, competent in motion recognition, physiological signal monitoring, intelligent actuation
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高影响因子
Journal of Energy Storage
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2024
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IF 8.9
Xinpu Zhou,Shuang Wang,Guangpeng Ma,Wenyu Bai,Xianfeng Guan,Cuicui Li,Wanzhen Wu,Shuyu Zhang
Two-dimensional material MXene (Ti 3 C 2 T x ) with multilayer structures is widely used in supercapacitors , but their structures tend to pile up and limit their performance. Therefore, a strategy is provided to synthesize the random copolymer aniline- co -pyrrole (ANPY) by in-situ polymerization of aniline and pyrrole on the MXene. The self-stacking of MXene materials can be prevented, and ANPY can be used as the intermediate layer to modulate MXene nanosheets forming more ion migration channels, which can improve the electrochemical performance of ANPY/MXene. MXene is used as a “backbone” for ANPY to adjust the chain space configuration of polymer molecules. The prepared ANPY/MXene electrodes have a high specific capacitance of 451.75 F/g increasing by 39 % on the original PANI electrode. PVA/MXene gel electrolyte and ANPY/MXene electrode are assembled to form a flexible supercapacitor capable of 91.8 % capacitance retention after 5000 cycles. It suggests that the ANPY/MXene material provides a new idea for preparing supercapacitors with good electrochemical performance.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Shuangqing Li,Xueke Jiao,Lili Chai,Zihan Su,Yushun Yang,Yafei Zhao,Yinze Yang,Dan Wang,Huishan Shang,Bing Zhang
Developing highly effective phase change composites (PCMs) featuring remarkable encapsulation, energy storage, conversion and management performance is of important significance for the practical utilization of organic solid-liquid PCMs. Herein, a secondary hierarchical structure (NSH) was constructed in nickel foam (NF) with silica fiber as scaffold for supporting halloysite (HNT) with polypyrrole (PPy) modification (HNT/PPy). The introduced HNT/PPy can narrow the pore size, intensify the optical absorption, and enhance the thermal and electrical conductivity of NF, while the inserted silica fiber network can prevent HNT/PPy with small particles to drop in the pores of the NF. When polyethylene glycol (PEG) is encapsulated in the NSH, the as-prepared PEG@NSH reveals an ultrahigh encapsulation rate (up to 87 % package), good shape stability (without any leakage at 100 °C with 82 % encapsulation) and excellent solar-thermal conversion capability (93 % of absorption rate, and 95.39 % of photothermal conversion efficiency). Meanwhile, the PEG@NSH also displays a significantly improved thermal conductivity (455 % of pure PEG). Combined the PEG@NSH composite with solar-thermal-electricity (STE) conversion device, efficient and stable voltage output of 907 mV and current output of 139.8 mA can be achieved at 3kW m −2 of light intensity. This work offers a straightforward construction approach for effective package of PCMs and efficient solar-thermal-electric energy conversion and management.
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Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Yaping Xu,Chenyang Dang,Xiangkun Elvis Cao,Yunteng Cao,Jiu Huang,Yuxiang Xu,Minghui Shan,Rui Liu,Peng Li,Guiyin Xu,Meifang Zhu
Solar-driven interfacial evaporation is an efficient, green, and low-carbon footprint way to separate heavy metals from contaminated soil. A biomimetic mushroom-like evaporator based on polypyrrole-modified cotton fabric is designed, which uses the mechanism of evaporative diffusion and gravity to drive the separation of heavy metal salt crystals, achieving sustainable remediation heavy metal contaminated soil (HMCS). This stereo biomimetic evaporator not only achieves excellent evaporation performance under solar energy drive but also enhances evaporation efficiency by capturing environmental energy from the side and then using natural convection . At an air velocity of 6 m s −1 , the evaporation rate reaches 2.32 kg m −2 h −1 . After continuous operation for 192 h, the biomimetic evaporator maintains stable evaporation performance and successfully separates metal salt pollutants from the washing solution of HMCS. The removal rates of heavy metal ions Pb 2+ , Cr 3+ , Cd 2+ , Zn 2+ , and Hg 2+ in polluted soil are 53 %, 59 %, 60 %, 62 %, and 84 %, respectively. Compared to untreated control soil, the concentrations of Pb 2+ , Hg 2+ , Cr 3+ , Zn 2+ , and Cd 2+ in the roots of pea treated with solar evaporation remediation decreased by 66.4 %, 31.6 %, 31.1 %, 29.0 %, and 8.3 %, respectively. This study provides a potential new approach and method for the sustainable, low-cost, and low-energy remediation of HMCS using solar evaporation technology.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
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2024
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IF 2.4
Bi Cen,Wen Qing,Chen Ye,Xu Haitao
Microbial fuel cell (MFC) has been regarded as a promising green and clean electricity generation device. The anode plays a crucial role in the electricity generation process within the MFC. This study employed a hydrothermal method for the doping of sulfur onto MXene nanosheets to alleviate the stacking, followed by an in situ polymerization process to fabricate sufur-doped MXene/polypyrrole (S–MXene/PPy) composite hydrogel on carbon felt (CF). The MFC constructed with this anode exhibited the highest power density of 8.05 W m −3 and a maximum output voltage of 646 mV, higher than that of MXene/PPy (623 mV, 6.03 W m −3 ), PPy (594 mV, 4.91 W m −3 ), and unmodified CF (574 mV, 4.05 W m −3 ). This improved performance can be attributed to the reduction of charge transfer resistance in the material while improving the bacteria affinity, leading to enhanced extracellular electron transfer (EET) efficiency. High-throughput sequencing indicates that the excellent biocompatibility significantly promotes the attachment and growth of electroactive microorganisms ( Geobacter , 45.34%) on the S–MXene/PPy anode. This study demonstrates that S–MXene/PPy hydrogel has good potential as an anode from the perspective of MFC electricity generation and microbial analysis. Graphical abstract
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SENSORS AND ACTUATORS A-PHYSICAL
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2024
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IF 4.1
Yuhan Zhao,Rui Zhang,Yunqing Liu,Feng Wang,Shi Hu,Fenghui Yang,Chao Tao,Qiong Wu,Baoli Zha,Jiansheng Wu,Fengwei Huo
The commonly employed wet and semi-dry electroencephalogram (EEG) electrodes require the use of conductive media, resulting in issues such as reduced comfort, detached conductive coatings, and limitations in long-term wearing. In this study, we present a user-friendly dry EEG electrode made from conductive leather for long-term EEG monitoring. The conductive leather was obtained by in-situ synthesis of polypyrrole inside the goat leather, which could be further used as an EEG electrode. When positioned on the forehead, the interface impedance between the leather electrode and human skin complied with the international standard for EEG electrodes. The material's exceptional breathability enabled prolonged electrode wear. These leather electrodes facilitated precise monitoring of eye movement signals and α-wave activities in a relaxed state, laying the groundwork for extending their application to other brain regions. Furthermore, leather electrodes exhibited excellent performance even in the presence of sweat interference, thus confirming their advantages for long-term EEG monitoring. The leather dry electrode featuring superior wearability, portability, and long-term stability is expected to bring significant implications for future wearable technologies and monitoring devices.
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ACS Applied Polymer Materials
·
2025
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IF 4.7
Changmei Lin,Zhenhao Pei,Jun Chen,Jinxin Lan,Hai Huang,Xiaojuan Ma,Shilin Cao
Tactile sensors are an important area in developing electronic skins and human–machine interfacing. Herein, we reported an eco-friendly cellulose paper based tactile sensor driven by a triboelectric nanogenerator (TENG). Enabled by the surface modification of polymethylhydrosiloxane (PMHS) and polypyrrole (PPy), the triboelectric negative performance and conductivity of cellulose paper were improved; therefore, the modified cellulose paper could be applied to the triboelectric negative material and electrode for TENG. At the contact and separation mode (CS mode), the short-circuit current (ISC), open-circuit voltage (VOC), and power density of the corresponding device were improved to 0.52 μA, 11.6 V, and 736.9 μW/m2. In addition, a single-electrode TENG based on this modified cellulose paper was also obtained by pairing it with human skin. The results indicated that this single-electrode TENG could generate a voltage of 23.8 V, current of 1.1 μA, and surface charge of 4.3 nC. Meanwhile, a tactile sensor for written stroke recognition based on the single-electrode TENG was also demonstrated.
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Small
·
2024
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IF 13
Huihui Liu,Cunji Gao,Peijing Xu,Yingshu Li,Xiaoxiao Yan,Xiaolu Guo,Changchun Wen,Xing-Can Shen
Surface-enhanced Raman scattering (SERS) imaging integrating photothermal and photodynamic therapy (PTT/PDT) is a promising approach for achieving accurate diagnosis and effective treatment of cancers. However, most available Raman reporters show multiple signals in the fingerprint region, which overlap with background signals from cellular biomolecules. Herein, a 4T1 cell membrane-enveloped gold nanorods-manganese porphyrins system (GMCMs) is designed and successfully fabricated as a biomimetic theranostic nanoplatform. Manganese porphyrins are adsorbed on the surface of Au nanorods via the terminal alkynyl group. Cell membrane encapsulation protects the manganese porphyrins from falling off the gold nanorods. The biomimetic GMCMs confirm specific homologous targeting to 4T1 cells with good dispersibility, excellent photoacoustic (PA) imaging properties, and preferable photothermal and 1 O 2 generation performance. GMCMs exhibit distinct SERS signals in the silent region without endogenous biomolecule interference both in vitro and in vivo. Manganese ions could not only quench the fluorescence of porphyrins to enhance the SERS imaging effect but also deplete cellular GSH to increase 1 O 2 yield. Both in vitro and in vivo studies demonstrate that GMCMs effectively eradicate tumors through SERS/PA imaging-guided PTT/PDT. This study provides a feasible strategy for augmenting the Raman imaging effects of the alkynyl group and integrating GSH-depletion to enhance PTT/PDT efficacy.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Min Yin,Chaohu Xiao,Yang Jin,Yanyu He,Yuhan Zhang,Lihua Chen
Solar-driven interfacial evaporation plays an essential part in the production of potable water. Nevertheless, the intricate water conditions in real-world scenarios continue to pose limitations on its utilization. This study prepared a novel bionic PPy/BiVO 4 -PI/MXene aerogel composite material with radial center structure through directional freezing as the evaporator, which integrates both photothermal and photocatalytic properties into the evaporation system. In order to evaluate the efficacy of photocatalytic degradation and salt collection during interfacial evaporation, high-concentration saline water, simulated seawater and dyeing wastewater were employed as substitutes for real contaminated water bodies. After being exposed to 1 kW/m −2 (−|-) of irradiation, the PPy/BiVO 4 -PI/MXene composite exhibits an evaporation rate of 1.64 kg m -2 h −1 and achieves a photothermal efficiency of 96.77 %. In high-concentration saltwater containing 20 wt% NaCl, the PPy/BiVO 4 -PI/MXene exhibited an evaporation rate of 1.32 kg m -2 h −1 and a photothermal conversion efficiency of 77.41 %. Furthermore, approximately 26.7 g of salt can be collected after 15 days’ continuous evaporation. Furthermore, the PPy/BiVO 4 -PI/MXene demonstrated exceptional photocatalytic capabilities to organic dyes such as MB, RhB, CR and MG with removal efficiencies of 79.28 %, 70.96 %, 76.70 % and 80.95 %, respectively. This study realizes the synergistic effect of interfacial evaporation, photocatalysis and salt collection, providing a highly promising choice for the treatment of high-salt dyeing wastewaters.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Kai Zhang,Rui Zhang,Qiguan Wang,Youjun Huang,Qiannan Liang,Guixin Wang,Yuxiao Hu,Ke Qin,Sumin Wang
Loading metal oxides on carbon nanotubes (CNTs) is a commonly used method to enhance the pseudocapacitance (PC) of metal oxides via the improved electrical conductivity. However, the small nanometer-sized tube of CNTs is factually an inaccessible internal channel for the diffusion of large hydrated ions, which reduces the contribution of electric double layer capacitance (EDLC) of CNTs and limits the rate capability of composites. To address this challenge, a 50-nm-diameter channel is here constructed in NiO@nitrogen-containing carbon (NC) by high-temperature calcination of Ni(OH) 2 /polypyrrole nanotube composite. The large-sized NC channel produced from decomposed polypyrrole significantly boosts the internal accessibility and accelerates the flow and penetration of electrolyte into the NC tube, enhancing the EDLC contribution of NCs and improving rate performance. The obtained worm-like NiO@NC shows high ion diffusion coefficient and impressive specific capacitance (SC). The assembled NiO@NC||graphene aerogel asymmetric supercapacitor offers high EDLC contribution of 65 % and exhibits a high SC of 763F g −1 , with outstanding retention of 93.40 % after 50,000 cycles at large current density. This study demonstrates an innovative approach to effectively combat the issue of internal inaccessibility of tubular carbon materials, marking an enormous progression in supercapacitor technology.
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Open Chemistry
·
2012
·Vol. 10
·期 4
·1157-1164
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IF 0
Zhihong Zhang,Guijuan Li,Fufeng Yan,Xianjun Zheng,Xili Li
Plasma polymerized pyrrole-like (PPpy) films exhibit good environmental stability and offer high reactivity with biomolecules. The present paper follows on from previous work on PPpy films applied as DNA immobilization/hybridization and describes the adsorption kinetics of bovine serum albumin (BSA) on PPpy films. Atom force microscopy was used to detect the surface roughness of PPpy surfaces obtained at different input powers or for different polymerization time, including the surface roughness before and after BSA adsorption. The influence of experimental conditions (i.e., the plasma input power, the polymerization time, the concentration of BSA, and the pH values of buffer solutions) on protein adsorption was investigated in situ by Surface plasmon resonance spectroscopy (SPR). SPR analysis confirmed the differently dynamic adsorption behavior of BSA on PPpy films under various experimental conditions. The adsorption constant, K a , was deduced from Langmuir isotherm equations, which were simulated using experimental data collected by SPR and electrochemical impedance spectroscopy (EIS). Analysis of the combination data of SPR and EIS indicates that PPpy films under various conditions show completely different adsorption behaviors and could be applied as biomaterials for electrochemical protein sensing or as protein-resistant.
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