JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Xilu Hong,Zong Lu,Yali Zhao,Luxi Lyu,Li Ding,Yanying Wei,Haihui Wang
As one of the green, renewable, and clean energy resources, hydrogen is widely developed and utilized throughout the world. Highly efficient membrane separation for hydrogen production is required to give promising gas permeance with enough H 2 selectivity. The membranes are desired to be produced in large-scale, fast and facile methods. Here we report for the first time a kind of freestanding MXene-ZIF-8 dual-layered membrane for hydrogen separation. Fast synthesis of such membranes is realized by combining electrophoretic deposition (EPD) and fast current-driven synthesis (FCDS), achieving the assemble of MXene layer and growth of ZIF-8 layer, respectively, overcoming the traditional time-consuming vacuum filtration methods and solvothermal synthesis . The MXene-ZIF-8 dual-layered membrane prepared within 20 min exhibits significantly improved gas separation performance, whose H 2 /CO 2 selectivity increases from 44 for the pristine MXene membrane to 77 with H 2 permeance of 5.97 × 10 −8 mol m −2 s −1 Pa −1 . This concept of structure design of membrane can also be extended to other dual-layered membranes, including various 2D nanosheet layers combined with different MOF layers.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
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IF 4.309
Yong-Hao Ma,Bolin Li,Jingjing Yang,Xiaofeng Han,Zhan Chen,Xiaolin Lu
Ion homeostasis regulated by diverse transport systems is important for cell functions, where the two major components of cell membranes, namely proteins and lipids, must play critical roles. The role of transport systems based on proteins, for example ion pumps and channels, has generally been acknowledged and studied in the past few decades, while the importance of lipid systems, for example lipid ion channels, has not been fully appreciated so far with the lack of detailed molecular-level information. Here, we applied sum frequency generation vibrational spectroscopy to investigate the lipid transmembrane movement, namely flip-flop, affected by metal ions for lipid bilayers, which is related to the cellular ion homeostasis. Metal ions in the same group (Ba2+, Sr2+, and Ca2+) but with different sizes were used; the distance between lipid molecules in a bilayer was also manipulated upon adjusting the surface pressure. We found that, on the one hand, there existed a match relationship between the metal ion size and the distance among the lipid molecules, which led to the significant decrease of the flip-flop rate for the lipid bilayer. On the other hand, the flip-flop process was accelerated when the metal ion size and the lipid distance were mismatched. This study highlights the ion size effects on the lipid transmembrane flip-flop rates, providing the inspiring clue for understanding the lipid function related to the cellular ion homeostasis.
研究领域:
生物物理学
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细胞生物学
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DOI
高影响因子
APPLIED CLAY SCIENCE
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2024
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IF 5.3
Tiancheng Gu,Junjie Xu,Fengdan Zhu,Zhengmao Ding,Yunjun Luo
Sustainable, clean, seawater-river interface osmotic energy shows great potential in replacing traditional fossil fuel sources. Two-dimensional (2D) nanofluidic channels, known for their high throughput, high integration density, and excellent scalability, render practical applications feasible for osmotic energy harvesting. However, 2D nanofluidic channels face challenges such as high internal resistance and high costs, which keep the ultimate goal of large-scale osmotic energy harvesting distant. Herein, a novel method to regulate ion transport resistance by constructing different hydrophilic asymmetric nanofluidic channels using bilayer membrane of vermiculite and MXene is proposed. Vermiculite nanosheets are prepared via polymer-assisted exfoliation method utilizing polyethyl-phosphate glycol ester. After simple stirring and maturation process, the exfoliation concentration can reach 20 phr within 8 h, which is 20 times higher than the previously reported maximum. The internal resistance of the bilayer membrane decreased from 24.1 kΩ to 15.0 kΩ as the direction of ions transport changes. Oxygen plasma assistance enabled the bilayer membrane to reach a maximum power density of 4.66 W m −2 . The high-efficiency preparation method of vermiculite nanosheets and the emphasis on membrane surface properties offer new insights into practical osmotic energy harvesting.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
Food Packaging and Shelf Life
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2025
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IF 10.6
Liangliang Zhang,Hanbo Yi,Saisai Feng,Mengmeng Zhang,Yu Wu,Jiahui Hao,Xuefang Liu,Jianguo Xu
Chitosan (CS) and polylactic acid (PLA) are both commonly used packaging materials in the food industry. However, a bilayer film made from CS and PLA, simultaneously incorporated with a complex essential oil-loaded Pickering emulsion (PE) system, have not been widely investigated. Therefore, this study designed bilayer films consisting of PLA layer and a PE layer. In the PE layer, binary nanoparticles composed of soybean protein isolate (SPI) and CS were used as solid supports to load increasing amounts (0 %, 2 %, 4 %, 6 %, 8 %, v/v) of complex essential oils (carvacrol and thymol, CT). The films were labeled BF-CT0, BF-CT2, BF-CT4, BF-CT6, and BF-CT8. The characteristics and functional properties were evaluated, along with the quality changes in refrigerated pork wrapped with the films (BF-CT0 or BF-CT8). Results indicated that CT addition significantly enhanced the stability of the PE. The PE layer with higher CT doses exhibited a denser microstructure, more hydrophobic surface, improved elongation at break, and greater water resistance. CT addition significantly improved light and gas barrier functions. Notably, the BF-CT8 film demonstrated extremely low water vapor and oxygen permeability (1.25 ± 0.06 kg•m⁻¹•s⁻¹•Pa⁻¹ and 0.24 ± 0.01 kg•m⁻¹•s⁻¹•bar⁻¹, respectively). All films showed a similar semi-crystalline structure, and CT addition decreased crystallinity. As expected, BF-CT8 displayed enhanced antioxidant and antibacterial performance. Finally, BF-CT8 extended the shelf life of refrigerated pork from 3 days to 6 days compared to BF-CT0 and unwrapped pork. In conclusion, the bilayer film shows great potential for use in pork preservation.
研究领域:
食品科学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
Yanping Huang,Nianhua Dan,Weihua Dan,Weifeng Zhao,Zhongxiang Bai,Yining Chen,Changkai Yang
A growth of bacterial infections and over-and inefficient release of antibiotics forces one to search new antibacterial agents and/or strategies. In this study, a novel strategy towards biocompatible and antibacterial bilayer wound dressing was proposed by a two-step spin coating method combined with in-situ crosslinking polymerization. First, through in-situ crosslinking polymerization, [2-(methacryloyloxy) ethyl] trimethylammonium chloride ([MTA][Cl]) was polymerized and crosslinked in polycaprolactone (PCL) solution and PCL/PMTA solution was obtained. Then, the PCL/PMTA solution was spinning-coated as the antibacterial top layer and the mixture of PCL and gelatin (Gel) (PCL/Gel) as the biocompatible bottom layer. The obvious bi-layered structure and boundary between the two layers was distinctly showed in scanning electron microscope (SEM) pictures. X-ray diffraction (XRD), attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR), differential scanning calorimeter (DSC), thermo-gravimetric analysis (TGA) and water contact angle (WCA) analysis were used to investigate the physical and chemical properties and obtained results demonstrated the successful preparation of the bi-layered membranes. The prepared bi-layered wound dressing displayed both strong antibacterial activity and good biocompatibility in vitro . The bilayered membranes with biocompatible and antibacterial properties would be next generation of wound dressing.
研究领域:
生物材料
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医学工程
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药剂学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Gang Wu,Wei Su,Lini Huo,Qing Guo,Jianhua Wei,Haiyi Zhong,Peiyuan Li
Developing bifunctional innovative food packaging for maintaining and monitoring food freshness is crucial for food safety. Here, we prepared tannic acid cinnamaldehyde nanoemulsions through self-assembly and ionic cross-linking between the natural emulsifiers tannic acid and cinnamaldehyde, and were incorporated into chitosan as a protective outer layer. Sodium alginate anchored with alizarin was employed as the sensing inner layer. A pH-sensitive bilayer film integrating real-time monitoring and maintenance of food fresh food freshness was designed using layer-by-layer assembly (LBL) technology. The prepared bilayer film exhibited 100 % UV protection, >99 % antimicrobial effect, and 94.86 % and 97.91 % clearance rates for DPPH and ABTS free radicals, respectively. In addition, the bilayer film exhibited high biosafety and sensitive, reversible, and rapid response to pH/NH 3 . Shrimp preservation experiments showed that the smart bilayer film could effectively slow down the growth of microorganisms on the surface of shrimp, extend the freshness period of shrimp, and could monitor the freshness of shrimp in real-time through color changes. In conclusion, the prepared SL-CCT bilayer film has excellent potential for food preservation and freshness monitoring, providing a new perspective for design and development of multifunctional smart food packaging films.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Aijaz Ahmed Babar,Dongyang Miao,Nadir Ali,Jing Zhao,Xianfeng Wang,Jianyong Yu,Bin Ding
Textiles with excellent moisture transport characteristics play key role in regulating comfort of the body, and use of color in textiles helps in developing aesthetically pleasing apparels. Herein, we report an aesthetically pleasing and breathable dual-layer cellulose acetate (CA) based nanofibrous membranes with exceptional directional moisture transport performance. The outer layer was synthesized by subjecting CA nanofibers to hydrolysis and reactive dyeing processes, which converted moderately hydrophobic CA nanofibers into uniformly colored superhydrophilic CA nanofibers with an excellent wettability. In addition to excellent wettability and superhydrophilic nature, dyed CA (DCA) nanofibers also offered high color yield and dye fixation as well as considerable colorfastness performance against washing and light, thus, were used as the outer layer. However, pristine CA nanofibers were chosen as the inner layer for their moderate hydrophobicity. The subsequent CA/DCA nanofiber membrane produced a high wettability gradient, which facilitated directional moisture transport from CA to DCA layers. The resultant dual-layer nanofiber membranes offered a high color yield of 16.33 with ∼82% dye fixation, excellent accumulative one-way transport capacity (919%), remarkable overall moisture management capacity (0.89), and reasonably high water vapor transport rate (12.11 kg d–1 m–2), suggesting them to be a potential substrate for fast sweat-release applications.
研究领域:
材料科学
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纺织工程
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 4
·2553-2563
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IF 6.123
Luo Ruiqing,Liu Ruihua,Li Yongqiang,Li Yarong,He Chiyang
The main challenge in developing polymer/covalent organic framework (COF) hybrid matrix membrane is to find effective strategies for strongly attaching crystalline COF to the supporting surface as defect-free membrane layers. In this article, we demonstrated for the first time a method for the preparation of a chitosan (CS)/COF mixed matrix dual-layer membrane based on solvothermal synthesis method. A novel surface modification strategy was developed using p-phthalaldehyde as covalent linkers between COF and CS membrane substrate, and then the nitrogen-containing covalent organic framework (NCOF) membrane was further grown in situ on the modified CS membrane substrate utilizing solvothermal synthesis methods. The resultant CS/NCOF dual-layer membrane exhibited highly homogeneous texture due to the excellent compatibility between NCOF crystals and CS matrixes. The combination of NCOF and CS membrane formed a large number of channels in the nitrogen environment, enabling the CS/NCOF dual-layer membrane to have an enhanced iodine uptake capacity up to 3.15 g/g. Furthermore, the CS/NCOF dual-layer membrane could be recycled at least five times while maintaining 95% iodine capture capacity. These properties make the obtained CS/NCOF dual-layer membrane ideal absorbent material for reversible iodine capture. This ingenious dual-layer membrane preparation strategy provides a new avenue to customize synthesis of novel membrane materials for clean energy and environmental remediation. Graphical abstract
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
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2023
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IF 8.1
Wanmei Lin,Yifan Zhang,Jihong Huang,Zhonghong Li
A pH-responsive double-layer film comprising chitosan (CS), zein (Z), curcumin-β-cyclodextrin complex (Cur- β-CD), alizarin (AL) and cinnamaldehyde (CIN) was developed to detect spoilage and prolong the shelf life of pork. The outer Z/AL is the colorimetric responsive and highly protective outer layer, while the CS/Cur- β-CD/CIN is the fluorescence responsive and functional layer. The CS/Cur- β-CD/CIN-Z/AL film demonstrated excellent barrier properties against oxygen (8.48 × 10 -13 g (m s Pa) -1 ) and water (2.42 × 10 -11 g (m s Pa) -1 ) primarily due to the polar interactions in the Z structure and its hydrophobic nature. The addition of AL and Cur provided the CS/Cur- β-CD/CIN-Z/AL film with pH colorimetric and fluorescence response capabilities, respectively. Furthermore, the inclusion of Cur- β-CD, CIN and AL significantly enhanced the film’s antioxidant and antibacterial properties, with radical scavenging rates of 79.29 % (DPPH) and 89.84 % (ABTS), as well as antibacterial efficiencies of 96.2 % ( S. aureus ) and 85.78 % ( E. coli ). To test the effectiveness of the double-layer film, a freshness monitoring and maintenance experiment was conducted on pork stored at 4 °C for 8 days. Various parameters of pork, including surface color, pH value, total volatile bases nitrogen (TVB-N), total viable counts (TVC), thiobarbituric acid reactive substance (TBARS), hardness and springiness, were measured, along with the color and fluorescence intensity (FL) of the film. The shelf life of the pork was extended by at least 2 days compared to the control group, and the pork was considered inedible if ΔE ≥ 12 or FL intensity ≤ 2160. Overall, this food packaging film shows promise in simultaneously monitoring and maintaining the freshness of pork.
研究领域:
食品科学
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材料科学
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生物工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2017
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IF 6.035
Qian-Cheng Xia,Jue Wang,Xiao Wang,Bo-Zhi Chen,Jia-Lin Guo,Tian-Zhi Jia,Shi-Peng Sun
The present research investigates the solution to solve the delamination issue and control the morphology of dual-layer membranes fabricated from polymer/solvent binary systems without additives, post-treatment and other complicated processes. First, Extem®, Ultem®, polysulfone (PSf) and polyethersulfone (PES) were used to study the mechanism behind the adhesion/delamination phenomenon. It was found that adhesion of dual-layer membranes has nothing to do with the similar functional group of top and bottom polymers. Dual-layer membranes with excellent adhesion can be obtained by a newly proposed hydrophilicity control mechanism. More specifically, to obtain a delamination-free membrane, bottom layer should be more hydrophilic than top layer. If not, a significant difference in precipitation rate of the two layers or replacing the coagulant with a milder medium was requested. Then, the method was further extended to prepare multi-layer membranes. Finally, desirable morphology of each layer of dual-layer membranes can be obtained by properly adjusting the thickness and solvent types of top and bottom layers.
研究领域:
材料科学
·
膜技术
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DOI
高影响因子
Frontiers in Pharmacology
·
2024
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IF 4.4
Li Junxuan,Ding Jiaxin,Zhou Tao,Li Bolun,Wang Jingjing,Wang Hanchi,Fu Li
Introduction: Guided bone regeneration (GBR) technology has been widely used as a reliable method to address alveolar bone defects. To improve the clinical effects of GBR approach, there have been attempts to develop barrier membranes with enhanced regenerative properties. However, modifying the material and structure of GBR membranes to integrate physicochemical properties and biological activity remains challenging. The aim of this study was to develop a novel functionally graded bilayer membrane (FGBM) with a gradient structure and composition, and to evaluate its osteogenesis promotion effect for GBR.Methods: By combining the phase inversion method and electrospinning method, functionally graded bilayer membranes (FGBM) with gradient structure and composition of poly(lactic-co-glycolic acid) (PLGA), nano-hydroxyapatite (nHA), and gelatin were fabricated in this study. The physicochemical and biological properties of the prepared FGBM, including structural and morphological characterization, mechanical properties, in vitro biodegradation, cell behaviors, and in vivo osteogenic bioactivity, were comprehensively evaluated.Results: The findings demonstrated the successful fabrication of PLGA/nHA/gelatin FGBM with an asymmetric structure, exhibiting enhanced hydrophilic, mechanical, and degradation properties. The incorporation of gelatin not only improved the biological integration, but also enhanced the binding affinity between electrospun fiber layer and phase inversion layer. The FGBM with a 30% nHA mass fraction and a PLGA/gelatin mass ratio of 1:1 exhibited excellent barrier function and osteogenic bioactivities in vitro and in vivo.Discussion: This work demonstrated the potential of PLGA/nHA/gelatin FGBM in bone regeneration and provided valuable insight for the development of barrier membrane.
研究领域:
生物材料学
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口腔医学
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组织工程学
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 9
·期 2
·2101848
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IF 6.147
Yufeng Liu,Hao Shao,Hongxia Wang,Zhongli Ji,Ruixi Bai,Feng Chen,Bin Li,Cheng Chang,Tong Lin
This study reports a patterned nanofibrous membrane and its novel filtration performance. The nanofibers are prepared using an electrospinning technique, and the nanofibers are collected on a commercial nonwoven fabric covering a roller collector, which is prepared using a metal sheet with a round hole array. The nanofibers collected on the metal surface have a much denser structure than those in the hole areas. As a result, the patterned nanofibrous membrane has a different filtration performance (lower pressure drop and filtration efficiency) from the uniform nanofiber membrane, prepared under the same condition but using a smooth roller collector. When two layers of this patterned nanofibrous membrane are combined, the filtration performance depends on the layer arrangement. When the dual-layer membranes are arranged with the dense and loose packing areas staggering between the layers, the filter shows lower filtration resistance but higher efficiency than the uniform dual-layer filter. It is further shown that the staggered dual-layer membranes (made of polyacrylonitrile nanofibers) maintain high efficiency after eliminating the electrostatic charges. The efficiency meets air filter F9, the highest requirement according to the air filter standard (EN 779:2012), enabling a long service life.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）