ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xin Tang,Hairui Xiong,Tiantian Kong,Ye Tian,Wen-Di Li,Liqiu Wang
The maneuver of small bubbles in a programmed way will advance numerous processes, including gas evolution reaction and aeration. Unlike in-air droplets, rapidly rising bubbles in liquid medium can hardly be steered through interaction with solid substrates, causing difficulties in maneuvering bubbles. We pattern and lubricate nanoporous substrates with regions of contrasting wettability that is similar to the back of Namib desert beetles and subsequently immerse the lubricated surface underwater to spontaneously form spatially patterned Nepenthes-inspired slippery surfaces after the dewetting of lubricants. As a result, bubbles are confined on lubricant-infused surfaces, with their high mobility well preserved. The interfacial states of attached bubbles are analyzed, and their dynamic sliding velocities are quantified. Using the lubricated patterned surfaces, we further demonstrate the predefined motion of bubbles driven by buoyancy at a small tiling angle, as well as a self-propulsion of bubbles driven by surface tension force at a tilting angle of 0°, respectively. The spatially lubricated surfaces simplify gas handling in liquid medium and have potential applications in fields where bubble handling is crucial.
研究领域:
材料科学
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生物仿生学
·
界面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Nan Sun,Shucheng Mo,Yuanhang Cai,Yingshuai Zhao,Yaling Han,Yijun Zheng,Tao He
Forward osmosis (FO) has shown great promise in concentrating enriched lithium brine during lithium extraction from salt-lake brine due to low energy consumption and ecologically friendliness. The effective utilization of enormous osmotic pressure of freely available MgCl 2 onsite requires highly selective FO membranes with high flux, which calls for thin-film composite forward osmosis (TFC-FO) membranes of highly interconnected substrate and defect-free separation layer. Herein, for the first time, we employed 2-Pyrrolidone (2-PD) as the solvent to prepare FO substrates via the non-solvent induced phase separation (NIPS) for preparing TFC FO membranes. Owing to its weak solubility, the PSf/2-PD polymer solution shows high viscoelasticity, resulting in spinodal demixing and a bicontinuous porous structure, unlike the closed finger-like pore structure observed in the PSf/DMAc binary system. By further reducing the casting humidity and coagulation bath temperature, the substrate surface pore size was optimized to prepare high-performance TFC-FO membranes: the TFC-30%-3 exhibits a water flux of 20.0 LMH and low specific reverse salt flux of 0.23 g/L at AL-FS mode, showing competitive performance compared to the state-of-the-art membranes. These results imply that 2-PD, as an environmentally friendly alternative to traditional solvents, shows significant promise for FO substrate preparation using a simple polymer/solvent binary system.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 1
·49622
·
IF 2.52
Feifei Lu,Peiyu Tan,Yuge Han
Polyaniline (PANI) films and its electrochromic devices based on various porous substrates were obtained by electrochemical deposition. The pore size distribution of the porous substrate has shown important influence on the infrared emissivity variation (∆ ε ) of the device. Morphology and structure of PANI were characterized by scan electronic microscopy (SEM) images and Fourier transform infrared spectra (FTIR). SEM images present the morphology difference of PANI on different substrates, which suggest that large pores will prevent PANI particles from forming orderly and compactly films. FTIR spectrum indicates that pore size of substrates affects the orientation of PANI chains. Furthermore, electrochemical properties and stability of PANI films were analyzed by cyclic voltammetry (CV) curves. And the CV curve revealed that the generation of irreversible degradation products is the reason for poor stability of PANI films. Finally, greatly improved ∆ ε of 0.559 in 3–5 μm waveband and 0.39 in 8–14 μm waveband is achieved by choosing a small pore substrate.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 4
·412
·
IF 4.562
Jian-Chen Han,Xiao-Yan Xing,Jiang Wang,Qing-Yun Wu
A porous substrate plays an important role in constructing a thin-film composite forward osmosis (TFC-FO) membrane. To date, the morphology and performance of TFC-FO membranes are greatly limited by porous substrates, which are commonly fabricated by non-solvent induced phase separation (NIPS) or thermally induced phase separation (TIPS) processes. Herein, a novel TFC-FO membrane has been successfully fabricated by using cellulose triacetate (CTA) porous substrates, which are prepared using a nonsolvent-thermally induced phase separation (N-TIPS) process. The pore structure, permeability, and mechanical properties of CTA porous substrate are carefully investigated via N-TIPS process (CTAN-TIPS). As compared with those via NIPS and TIPS processes, the CTAN-TIPSsubstrate shows a smooth surface and a cross section combining interconnected pores and finger-like macropores, resulting in the largest water flux and best mechanical property. After interfacial polymerization, the obtained TFC-FO membranes are characterized in terms of their morphology and intrinsic transport properties. It is found that the TFC-FO membrane supported by CTAN-TIPSsubstrate presents a thin polyamide film full of nodular and worm-like structure, which endows the FO membrane with high water permeability and selectivity. Moreover, the TFC-FO membrane supported by CTAN-TIPSsubstrate displays a low internal concentration polarization effect. This work proposes a new insight into preparing TFC-FO membrane with good overall performance.Keywords:thin-film composite membrane;forward osmosis;phase inversion;porous substrate;internal concentration polarization
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2018
·
IF 3.483
Qing-Yun Wu,Xiao-Yan Xing,Yuan Yu,Lin Gu,Zhi-Kang Xu
Novel thin film composite forward osmosis (TFC-FO) membranes were developed by using hydrophilic cellulose triacetate (CTA) porous substrates prepared by thermally induced phase separation (TIPS) method. A series of CTA substrates with different structures were fabricated to demonstrate the structure-performance relationship of the TFC-FO membranes. It is found that the substrates possess relatively large pores on their rough surfaces as well as their intrinsic hydrophilicity , leading to intensively large “ridge-and-valley” structures on the TFC-FO membranes. The large surface pores of the CTA substrates result in thick and rough polyamide skin layers. Moreover, the optimal CTA porous substrates should have a small thickness, high porosity, and oriented plate-like pores. These structures profit the TFC-FO membranes with superior water permeability, relatively high salt rejection, and low structural parameter. The one with thickness of 102 ± 16 μm and porosity of 87.1 ± 1.1% shows the smallest structural parameter (516 μm) and the desirable over-all properties in terms of water permeability and selectivity. It means that the hydrophilic CTA porous substrates enable to alleviate the internal concentration polarization (ICP) effect. These TFC membranes could provide a new route to develop high-performance composite membranes for FO desalination .
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2013
·
IF 3.535
Chengguo Yin,Yingzhou Guan,Zhe Zhu,Xishuang Liang,Biao Wang,Quan Diao,Han Zhang,Jian Ma,Fengmin Liu,Yanfeng Sun,Jie Zheng,Geyu Lu
In this article, the NO 2 sensing performance of the mixed-potential-type yttria stabilized zirconia (YSZ)-based sensor was improved by modifying the three-phase boundary (TPB). The double-tape casting and the pore-forming method were simultaneously used to obtain the porous YSZ-substrate. Furthermore, a group of tape-casting slurries with different starch concentrations (0 wt%, 5 wt%, 10 wt% and 15 wt%) were applied to form the different contact areas of the three-phase boundary (TPB). The scanning electron microscope (SEM) images showed that YSZ-substrate prepared by using the slurry with 15 wt% starch had the largest contact area. The sensor based on the YSZ-substrate with the largest contact areas and the MnCr 2 O 4 sensing electrode (SE) showed the largest response compared with the other sensors when they were exposed to 10–500 ppm NO 2 at 800 °C. The measured polarization ( I – V ) curves indicated that the present sensors operated under the mixed-potential mechanism. In addition, the sensor showed a good selectivity and repeatability to NO 2 .
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Shang-Jin Yang,Zhi-Yuan Xu,Ling-Yun Zou,Jiong-Chi Yu,Jian Ji,Zhi-Kang Xu
The advanced oxidation process of the photo-Fenton reaction can produce hydroxyl radicals with extremely strong oxidizing properties for the efficient and green degradation of various chemical and microbial pollutants. Herein, we report an approach to fabricating heterogeneous Fenton catalysts of β-FeOOH nanorods on porous substrates triggered by mussel-inspired coatings of levodopa (3,4-dihydroxy-phenyl-l-alanine, l-DOPA) and polyethylenimine (PEI) for efficient photocatalytic dyes’ degradation and sterilization. The l-DOPA-based coatings not only promote the formation and immobilization of β-FeOOH nanorods on the porous substrates by strong coordination between catechol/carboxyl groups and Fe3+ but also improve the energy band structure of the Fenton catalysts through a valence band blue shift and band gap narrowing. The photo-Fenton catalysts prepared by the l-DOPA-based coatings exhibit high electron transport efficiency and improved utilization of sunlight. Only 2 h of mineralization is needed to fabricate these catalysts with excellent photocatalytic efficiency, in which the degradation efficiency of methylene blue can reach 99% within 30 min, whereas the sterilization efficiency of E. coli/S. aureus can reach 93%/94% within 20 min of the photo-Fenton reaction. Additionally, the prepared catalysts reveal a high photodegradation performance for various dyes including methylene blue, methyl blue, methyl orange, direct yellow, and rhodamine B. Furthermore, the catalysts retain high dye degradation efficiencies of above 90% after five photodegradation cycles, indicating cycling performance and good stability.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 6
·067514
·
IF 4.316
Hao Wan,Xin Liu,Xinyi Wang,Yuantao Chen,Ping Wang
Gas sensors have attracted extensive attentions due to their vital roles in various applications. However, gas sensors featuring long lifetime, fast response and low cost still remain challenging. This paper presents a facile screen-printed carbon nanotube electrode on porous polytetrafluoroethylene (PTFE) with room temperature ionic liquid (RTIL) for rapid gas sensing. Screen printing technique was implemented on porous PTFE substrate to form three-electrode system using carbon nanotube ink and silver ink. Thus, gases can directly diffuse through the porous substrate rather than supporting electrolyte for rapid detection. RTIL was utilized as the supporting electrolyte that ensures long sensor lifetime. With gold nanoparticles modification, the sensor exhibited enhanced electrochemical performance for gas detection. Chronoamperometry was conducted to evaluate the sensor performance from 2.1% oxygen to 12.6% oxygen, validating good sensitivity and linearity. The sensor also presented good repeatability, stability and reproducibility in the tests. Due to the unique porous substrate of the sensor, the response time can be as low as ∼14 s that achieves rapid oxygen sensing. In summary, the sensor was validated with satisfactory performance, which is promising for wearable gas sensing and acute gas exposure alerting.
研究领域:
材料科学
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分析化学
·
传感器技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Haiyan Feng,Song Wang,Kai Chen,Xinyue Zhang,Cunao Feng,Xiaowei Li,Weibo Yang,Dekun Zhang,Shirong Ge
Hydrogels with excellent mechanical and lubrication properties have been developed rapidly, laying the foundation for their application in cartilage replacement. However, the combination of robust hydrogels and substrates under different forms of movement is a great challenge. In addition, due to differences in modulus, the stress shielding effect caused by implantable artificial joint metal materials can lead to bone resorption. Here, we proposed to combine a 3D printed porous titanium alloy with a high-strength lubricating hydrogel to construct an integrated joint substitute material. The porous titanium alloy TC4 substrate constructed by 3D printing possesses a modulus similar to that of human bone. The strong bonding of the hydrogel and TC4 was achieved through two strategies: mechanical interlocking and chemical bonding. The combination of the alloy substrate and hydrogel realizes the construction of a bionic lubricating cartilage layer on the surface of traditional artificial joint materials. The hydrogel has excellent bonding properties with the porous substrate under different test conditions. Truly human-like joint sockets were prepared for the first time with soft–soft and soft–hard contact modes. Under conditions simulating human motion, the hydrogel maintains a low friction coefficient and still has excellent substrate adhesion after 100,000 cycles. This study further pushes the application of hydrogels in biolubrication into practice.
研究领域:
材料科学
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生物医学工程
·
组织工程
✓ 已验证
DOI
高影响因子
ANALYST
·
2024
·
IF 3.6
Yimeng Shi,Yan Zhu,Jiaojiao Sun,Huancai Yin,Jian Yin
Nowadays, trace detection of thiram is in urgent demand due to its widespread application in agriculture and significant harmful effects on public health. In this work, a three-dimensional (3D) sea cucumber-like flexible porous surface-enhanced Raman scattering (SERS) substrate composed of a poly(vinylidene fluoride) (PVDF) membrane, ZnO nanorods, gold films, and Ag nanoparticles (Ag/Au/ZnO/P) has been established for the highly sensitive detection of thiram. The substrate takes advantage of the 3D morphology of the Ag/Au/ZnO system on a flexible porous PVDF membrane to produce abundant plasmonic hot spots. Meanwhile, the employment of an AgNPs/Au shell system combined the benefits of both gold and silver metals, thus guaranteeing stable and sensitive detection. With 4-mercaptobenzoic acid (4-MBA) as a probe molecule, the Ag/Au/ZnO/P substrate exhibited excellent linear detection in the range of 10−11–10−5 M, with a correlation coefficient (R2) of 0.99 and an enhancement cofactor of 7.09 × 107. The substrate exhibited excellent uniformity with a related standard deviation (RSD) value of 3.82% and demonstrated high stability during a 15 d-storage test. In addition, the substrate could detect thiram in an aqueous solution at concentrations as low as 10−10 M with excellent selectivity. Meanwhile, thiram on the surface of apple peel could be easily detected by the Ag/Au/ZnO/P substrate with the “paste-and-peel” method in less than 10 s, and the detection limit could be as low as 0.48 ng cm−2. Overall, the remarkable performance of the Ag/Au/ZnO/P SERS substrate demonstrated its great potential for the environmental monitoring of thiram.
研究领域:
分析化学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2024
·Vol. 13
·期 5
·2401556
·
IF 3.6
Cong Li,Yan Yuan,Zhengqian Li,Yaxin Kong,Hai Lu
Aimed at the application drawbacks of lithium-polysulfide semiflow battery involved with low utilization of active material and inevitable shuttle effect, a self-supporting porous substrate characterized by high porosity and outstanding conductivity is developed in this study, which consists of cotton-derived nanofiber and graphene wrapped on the nanofiber. Then a gelable polymer poly-(vinylidenefluoride-hexafluoropropylene) is further integrated into the porous substrate for fabricating novel PS gel cathode. The as-prepared composite matrix possesses strong PS adsorption/loading ability by gelation as well as favorable electron/ion transport pathway, which not only provides effective restriction toward PS migration and shuttle, but also actualizes rapid redox conversion of the localized active species. Consequently, the resultant PS gel cathode demonstrates high reversible capacity, and excellent cycle and rate capability even at a high sulfur loading up to 9.0 mg cm −2 .
研究领域:
电化学
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能源材料
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纳米材料
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储能技术
·
电池化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shiyu Zhang,Aiguo Rao,Kai Lin,Qi Yao,Chunhui Niu,Lei Wang,Mingqing Yang,Xueqiong Bai,Yong Lv
Recently, the Fabry–Perot (F–P) cavity electrochromic devices, which are constructed by combining nano-size inorganic electrochromic material WO 3 and reflective metal layers, have attracted considerable attention due to their potentials in the fields of dynamic multicolor displays and active camouflage. However, in the few studies that have been reported, the peak reflectance of flexible F–P cavity multicolor electrochromic devices in the visible wavelength band is generally lower than 30 %, which limits their reflective display and camouflage effects in high-brightness environments. Thus, we have combined multicolor reflective electrochromic electrodes in WO 3 /Au asymmetric F–P nanocavity constructed by magnetron sputtering on a Nylon 66 porous substrate with a highly transparent UV-cured gel electrolyte and a PET plastic sealing procedure. As a result, a flexible and dynamic multicolor electrochromic skin with high reflectance (R max ＞50 %) and excellent flexibility (bending radius of 4 mm) has been fabricated. The WO 3 electrochromic layer at the top works as the dynamic dielectric layer in the broadband absorption Fabry–Perot cavity, and the inert metal Au layer at the bottom works as the reflective layer. The WO 3 /Au asymmetric F–P cavity can acutely capture the variation in optical constants of WO 3 due to the thickness change and electric-driven effects. This cavity facilitates the selective reflection and absorption of the energy distribution of the spectrum after the induced interferometric resonance. As a result, the cavity exhibits a rich array of structural colors, including ocher, taupe, yellow, orange, green, and violet. The electrochromic skin exhibits a fast switching time and maintains 99.43 % of the optical modulation amplitude (ΔR) after 110 coloring/bleaching cycles. It provides a potential option in the field of flexible high-brightness reflective displays and dynamic camouflage in the future.
研究领域:
材料科学
·
光学工程
·
柔性电子
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）