Journal of Water Process Engineering
·
2024
·
IF 6.3
Zhaohui Zhang,Wenshuo Hu,Cong Ma,Tong Zhang,Liang Wang
Understanding the irreversible fouling mitigation performance of conductive membranes is crucial for engineering applications. In this study, the effectiveness of conductive membranes in mitigating the irreversible fouling caused by typical membrane pollutants and actual surface water was investigated. The results indicated that the conductive membranes had the greatest mitigating effect on irreversible fouling caused by humic substances and the weakest mitigating effect on that caused by proteins. The growth rates of irreversible membrane fouling over five-cycle filtration with conductive membranes were reduced by 58.6 % (humic acid), 42.3 % (sodium alginate), and 30 % (bovine serum albumin) compared to those without power. Moreover, conductive membranes exhibited a commendable irreversible fouling mitigation effect when treating real surface water. The irreversible fouling growth rate and resistance decreased by 41.6 % and 49.9 %, respectively, compared to those without power. Although the increase in the ionic strength of the feed water weakened the effectiveness of the conductive membranes in irreversible fouling mitigation, it was still significantly better than that without power.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2021
·
IF 9.501
Minyuan Han,Yuting Wang,Jingmei Yao,Caihong Liu,Jia Wei Chew,Yi Wang,Yingchao Dong,Le Han
This study mainly focused on enhancing oil-membrane electrostatic repulsion towards anti-oil-fouling via electrically conductive hydrophobic membrane in electricity-assisted membrane distillation (MD). Carbon nanotubes (CNTs) were coated on commercial membranes to fabricate membrane cathode. For concentrated hexadecane-in-saline water emulsions, the modified membrane exhibited significantly less flux decline, < 5% in dealing with extreme high-concentration oil emulsion (2000 ppm) at cell potential of 3.0 V. The anti-oil-fouling robustness was further confirmed over a continuous three-cycle operation with in-situ DI rinse. The anti-fouling mechanism was systematically discussed regarding the hydrophilicity of the membrane interface , charge repulsion between the oil and membrane cathode as well as slippery property at the liquid-gas-solid triple-phase interface. A modeled fouling rate constant was negatively associated with the calculated capacitive surface charge of the membrane cathode. Thermodynamics analysis suggested enhanced foulant-membrane electrostatic repulsion leads to a significant energy barrier which favored anti-fouling performance. Interestingly, the sliding dynamics of oil droplet along the interface of membrane cathode was found, tuned by the herein weak cell potential, which could also contribute to the fouling mitigation. Our results insight that the electrically conductive membrane cathode could modulate the foulant-membrane interaction which plays an important role in mitigating fouling/wetting occurred at the triple-phase interface.
研究领域:
环境工程
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材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Yingxin Liu,Minhua Jiang,Junying Hu,Zixuan Guo,Jian Liu,Xinxin Fu,Li Liu,Shaohua Jiang
A novel conductive membrane, polypyrrole carbon nanotubes polysulfone (PPy-CNT-PSF), was successfully synthesized using the membrane phase infiltration in-situ polymerization method (MPIP). The resulting PPy-CNT-PSF, utilized as an anode in the electrochemical filtration reactor, exhibited a chain-like morphology of PPy extending from within to the exterior of the PSF membrane, effectively anchoring the CNT layer on its surface and establishing a stable conductive network with a surface resistance of 0.142 ± 0.052 kΩ/cm. Its electrical conductivity surpasses that of most conductive membranes derived from pyrrole (Py). Furthermore, the structural integrity of this conductive membrane remained intact following exposure to chlorine. Cyclic voltammetry (CV) analysis revealed a subtle redox peak with no significant alteration in surface structure after 50 CV cycles. This reaction can be attributed to a Fenton-like reaction process due to Fe presence detected by EDX on the surface. Current-time curves under constant potential further confirmed that the PPy-CNT-PSF conductive membrane possesses both a stable conductive network and favorable electrode stability. Additionally, self-cleaning occurred when voltage was applied during electrochemical experiments utilizing a conductive membrane anode paired with a Ti cathode due to electrostatic repulsive forces. At an applied voltage of 20 V, removal efficiency and flux restoration achieved values of 97.63 % and 100 %, respectively. This straightforward yet effective approach is believed to hold promise for fabricating conductive membranes characterized by structural stability and electrode reliability for practical applications aimed at mitigating membrane fouling.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Zhaoyang Li,Yahong Li,Weijun Zhao,Yuezhan Feng,Bing Zhou,Chuntai Liu
Flexible transparent electromagnetic interference (EMI) shielding films in visual windows are crucial for the innovation of optoelectronic devices, but the challenge of balancing light transmittance and EMI shielding effectiveness (SE) still exists. Herein, this work described a flexible transparent MXene@SWNTs/PC film with a hierarchical conductive layer that was fabricated via an alternating rotation spraying method. The multi-scale hierarchical structure configured with 1D SWNTs and 2D MXene endow the obtained film with good comprehensive properties, i. e, low sheet resistance of 32.8 Ω/sq at 56.1% light transmittance, thus causing a satisfactory EMI SE of 20.8 dB. Moreover, the transparent shielding films exhibit remarkable flexibility, which can maintain steady EMI SE after 1000 continuous bending cycles. More importantly, the low sheet resistance and high light absorption capacity of hybrid conductive layer facilitate the transparent shielding film with low-voltage-driven electric heating effect and outstanding photothermal conversion ability, respectively, ensuring the normal operation under extreme cold condition. The combination of good light transmittance, satisfactory EMI shielding performance, and multi-source thermal response enables MXene@SWNTs/PC film to have great potential as a transparent shielding film in emerging optoelectronic devices.
研究领域:
材料科学
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电子工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 20
·1-9
·
IF 2.8
Yan Caibo,Su Zhiwei,Zhao Zhuo,Zhou Yanwen
Leveraging the conductivity of In 2 O 3 and the wear resistance and anti-corrosion behaviour of SiO 2 and TiO 2 , In 2 O 3 , In 2 O 3 /SiO 2 and In 2 O 3 /TiO 2 films were prepared via magnetron sputtering to meet the transparency, conductivity, wear resistance and corrosion resistance requirements for external screens of wearable devices. The films exhibited excellent sheet resistance of 13–28 Ω·sq −1 , which fully met the conductivity criteria. Owing to the light interference effect, the average transmittance of the In 2 O 3 film (77%) was higher and lower than those of the In 2 O 3 /TiO 2 (69%) and In 2 O 3 /SiO 2 (83%) films, respectively. After soaking in sweat solutions for 48 h, the In 2 O 3 and In 2 O 3 /SiO 2 films maintained their optical and electrical properties and the In 2 O 3 /TiO 2 film was partially peeled off in the acid solution. The low transmittance and corrosion resistance of the In 2 O 3 /TiO 2 film were due to severe oxygen deficiency in the TiO 2 layer, indicated by the certain amount of Ti 2 O 3 and metal Ti in XPS. The wear failure time of the In 2 O 3 /SiO 2 film (42 h) was greater than those of the In 2 O 3 (30 h) and In 2 O 3 /TiO 2 (24 h) films because of its hard SiO 2 top layer. Based on the ‘parallel sheet resistance principle’, the resistivity of the double-layer films was mainly attributed to the conductive In 2 O 3 layers. The wear and corrosion resistances were ascribed to the top passive transparent layers, in which the SiO 2 layer showed its excellent optical and electrical performance stabilities before and after corrosion and wear resistance functions. With its commonly high transparency and conductivity as well as its high wear and corrosion resistances, the In 2 O 3 /SiO 2 film exhibits application potential for external screens of wearable devices.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 7
·3392-3407
·
IF 3.9
Wang Xuewen,Zhao Jie,Shi Qingwen,Li Peibo,Luo Guoqiang,Shen Qiang,Sun Yi
Metal electrodes of crystalline silicon solar cells need to possess good photoelectric conversion properties and play a critical role in converting solar energy into electrical energy, making it particularly important to obtain highly conducive, cost-effective and chemically stable materials. This paper prepared uniformly silver-coated copper powders (Cu@Ag) via electroless plating and a conductive film with low sheet resistance by air oxidation combined with hydrogen reduction sintering (jointly referred to as oxidation–reduction sintering). In addition, the densification mechanism of the Cu@Ag conductive film during sintering was revealed. Results showed that oxidation–reduction sintering promoted the diffusion between Cu and Ag, enhancing the plastic flow of phases and improving the densification of the conductive film. Moreover, the densification of the conducive films was further improved by designing multiple layers. The sheet resistance of the four-layer Cu@Ag conductive film was reduced to 1.5 mΩ/□ at 700 °C, while that of the four-layer Cu@Ag conductive film increased by only 0.6 mΩ/□ at 200 °C after eight days, much more stable than Cu film. This work demonstrates the tremendous potential of oxidation-resistant Cu@Ag conductive pastes in low-cost photovoltaic cells, electronics, and other commercial applications. Graphical
研究领域:
材料科学
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太阳能技术
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Jingyi Yang,Feiyun Sun,Lingyan Zhao,Ding Yu Xing,Wenyi Dong,Zijun Dong
Electric membrane bioreactor (E-MBR) for wastewater treatment and water purification has attracted significant interest due to its remarkable performance in fouling mitigation. The performance is much relevant to the electric and physicochemical properties of the conductive membranes in E-MBR. This study proposed a facile method to prepare a conductive membrane with low electrical resistance and enhanced hydrophilicity. Oxidative polymerization of pyrrole doping with ionic liquids was conducted on the surface of polyvinylidene fluoride (PVDF) membranes. Among the studied ionic liquids, 1-butyl-3-vinylimidazolium tetrafluoroborate (BVIMBF 4 ) was the most suitable in this work. The electrical resistance of the PVDF membrane modified by pyrrole and BVIMBF 4 (PPy-BVIMBF 4 /PVDF membrane) was as low as 9.76 Ω/sq, and its water contact angle reduced from 81° to 45°. In the fast-filtration tests, these conductive microfiltration membranes exhibited high rejections of Cu 2+ ions (~85%) and Ni + ions (~65%) and enhanced antifouling performance during the bovine serum albumin filtration with the application of an electric field. A long-term E-MBR operation demonstrated that the transmembrane pressure (TMP) rise and the flux decline of the PPy-BVIMBF 4 /PVDF membrane were significantly alleviated due to its improved conductivity and hydrophilicity. Its total membrane resistance for water transport was only 27% of the base PVDF membranes under a minute electric field of 0.8 V/m. Overall, the incorporation of ionic liquids in the oxidative polymerization of pyrrole offers a novel and effective strategy in conductive membrane fabrication and serves as an excellent method in fouling mitigation in MBR.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Jiahuan Li,Xiao Qiu,Shaojie Ren,Hao Liu,Shan Zhao,Zhonghua Tong,Yunkun Wang
As emerging contaminants, antibiotic and antibiotic resistance genes (ARGs) in wastewater effluent induce and increase the risk of antibiotic resistance spreading in the environment. Herein, we fabricated a series of polyaniline/carbon nanotube-assisted electroactive membranes (PANI/CNT-EMs) to remove low-concentration antibiotics (i.e., sulfamethoxazole, SMX), antibiotic-resistant bacteria (ARB), and ARGs, thus reducing ecotoxicity and antibiotic resistance pollution in wastewater effluent. The PANI/CNT-EMs possess excellent electrochemical properties with a uniform and stable structure. Compared with pristine EMs, the PANI/CNT-EMs effectively enhanced SMX degradation and substantially lessened the ecotoxicity of the degradation products. The PANI/CNT-EMs show higher inactivation ability in intercepted ARB and significant degradation of both intracellular and extracellular ARGs (iARGs and eARGs) during wastewater effluent electrofiltration under a low voltage of +2 V. More importantly, the reduced integron (i.e., intI1 ) abundance and ARG transfer frequency further demonstrated that the PANI/CNT-EMs are more conducive to controlling the spread of antibiotic resistance. Furthermore, compared with pristine EMs, the antifouling property of PANI/CNT-EMs is improved by 42.1% during wastewater effluent treatment. Overall, these findings offer a promising approach for antibiotic resistance control in wastewater effluent treatment.
研究领域:
环境科学
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生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Zheng Liang,Xiaoliang Li,Pengyan Luan,Zhenxin Yang,Jiale Su,Xuanhe Li,Fushun Li,Dongming Zhang,Jinquan Huang,Haikun Zhu,Dengke Wang,Zheng-Hong Lu,Qiang Zhu
The recent advancement of stretchable photoelectronics has catalyzed revolutionary transformations in various cutting-edge fields. However, the stretchable transparent electrodes (STEs), which are vital components ensuring signal conduction in stretchable photoelectronics, pose a challenge due to the rigid and fragile nature of conventional conductive materials. In this study, we demonstrated a prestrain transfer technique for fabricating STEs using PEDOT:PSS. The resulting STEs achieved a sheet resistance of approximately 50 Ω/sq by leveraging the benefits of methanesulfonic acid treatment and incorporating a carbon-nanotube blend in PEDOT:PSS. The fabricated STEs exhibited exceptional transparency exceeding 90% and remarkable stability over 1000 stretching cycles without degradation in conductance. An in situ investigation was conducted to visualize the deformation of the PEDOT:PSS film and its association with the electrical ductility of the STEs. The prestrain transfer was found to induce kirigami-type cracks and out-of-plane microwrinkles in the PEDOT:PSS film. These structures effectively alleviate stress concentration and compensate for strain during stretching loading, thereby imparting enhanced stretchability and electrical ductility to the STEs. However, once the stretching strain exceeded the prestrain threshold, numerous microcracks emerged on the PEDOT:PSS film, leading to electrical failure of the STEs due to a significant rise in resistance. The incorporation of carbon nanotubes was demonstrated to modulate crack structures, thereby enhancing both the mechanical and electrical ductility of STEs. Additionally, a theoretical model was proposed to quantitatively analyze the morphological evolutions in the PEDOT:PSS film while establishing its correlation with the mechanical and electrical properties of the STEs. The parameters associated with crack structures, sensitivity of resistance to cracks, and tensile limit of PEDOT:PSS were extracted to elucidate the underlying mechanisms of prestrain engineering on the electrical ductility and failure of the STEs. The present results offer guidance for experimental and theoretical approaches for optimizing the fabrication process of stretchable electronics.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 6
·1249
·
IF 4.6
Jingjing Wang,Haiting Shi,Jixian Gong,Geng Tian,Jinbo Yao
Electrochromic fabrics (ECFs) can be applied to wearable displays and military camouflage clothing, and they have great potential in developing wearable products. Current ECFs are often bulky, involve complicated processes, and have high production costs. In this study, we report a novel strategy for preparing electrochromic fabrics that require only a three-layer structure: cotton fabric as the substrate, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the electrochromic layer and the electrodes, and an ion-conducting film (ICF) bonded to the fabric by hot pressing. Compared with conventional ECFs, this method does not require the extra preparation of electrode layers on the fabric, as these layers affect the color-changing effect. Hot pressing eliminates the need for a complex sealing process and is more suitable for fabrics with poor wicking effects, which increases the method’s applicability. Cotton fabrics offer the value of biodegradability and are more environmentally friendly. Meanwhile, unlike carbon cloth, the fabric’s color does not interfere with the electrochromic effect. The ICF is non-liquid and can maintain the dryness of the fabric. Additionally, the ICF provides high-temperature protection up to 150 °C. The ECFs exhibit exceptional thinness at 161 µm and a lightweight construction with a 0.03 g/cm2weight. Furthermore, the ECFs exhibit a relatively long sustain time of 115 min without voltage, demonstrating impressive performance. Improved peel strength to 7.11 N is achieved through an improved hot-pressing process. The development strategy for ECFs can also be applied to other electrochromic substances, potentially advancing intelligent applications such as wearable fabrics and military camouflage while promoting rapid progress in electrochromic fabrics.
研究领域:
材料科学
·
纺织工程
·
智能穿戴技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Bing Zhou,Zhaoyang Li,Yanli Li,Xianhu Liu,Jianmin Ma,Yuezhan Feng,Dianbo Zhang,Chengen He,Chuntai Liu,Changyu Shen
Developing multifunctional transparent shielding films (TSFs) are highly desirable for the advanced visualization electronic devices. Herein, based on the excellent electrical conductivity of two-dimensional Ti 3 C 2 T x (MXene), flexible hydrophobic MXene-based transparent conducting films are applied in the field of shielding electromagnetic wave and electrical heating. Typically, a spraying coupled with spinning technique is demonstrated to orderly deposit MXene and hydrophobic fumed silica (Hf-SiO 2 ) on transparent polycarbonate (PC) for developing the multifunctional TSFs. The obtained sandwich structural PC/MXene/Hf-SiO 2 film exhibits the balanced optical and electrical properties with a low electrical resistance of 35.1 Ω/sq and corresponding transmittance of 33.4%, showing an effective electromagnetic interference shielding effectiveness (EMI SE > 20 dB) combined with a rapid steady joule heating performance at safe voltages (~100 °C at 13 V), simultaneously. Meanwhile, the superhydrophobic Hf-SiO 2 coating layer not only endows the film with excellent self-cleaning ability, but also prevents MXene from oxidation . As a result, the hydrophobicity , conductivity and shielding performance of this film can steadily maintain in outdoor conditions for 100 days. Besides, outstanding flexibility gives the film with superior mechanical fatigue resistance (<10% resistance change after mechanical bending 1000 cycles). This work opens a new avenue for preparing next-generation multifunctional TSFs to meet the various application environments.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 7
·5802-5812
·
IF 2.993
Zheng Boda,Zhu Qingsheng,Zhao Yang
In this work, we reported a facile approach to fabricate silver nanowire (AgNW) networks on flexible substrates. Through immersing the modified poly (ethylene terephthalate) with positively charged functional group into the AgNW dispersion with anionic dispersant, a flexible AgNW transparent conductive film was formed by electrostatic adsorption self-assembly process. Even without a post-treatment process, the as-prepared flexible AgNW films exhibited excellent optoelectrical property, low surface roughness and high reliability. It was shown that the insulating dispersant on AgNWs could be effectively removed by an ion bombardment method and then greatly decreased the sheet resistance of AgNW networks. Because of the nature of spontaneous adsorption, this preparation method can be suitable for an arbitrary shaped substrate, which will broaden the application of AgNW conductive films in optoelectronic devices.
研究领域:
材料科学
·
纳米技术
✓ 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）