Salih Durdu, Atasoy, Sitki Aktaş, E. Yalçın, K. Çavuşoğlu
The aim of this work is to investigate wettability and antibacterial properties of the well-ordered TiO2 nanotube (TNTs) surfaces on new generation Ti15Mo alloys for dental and orthopedic implant applications. Thus, the well-ordered TNTs and flat oxide surfaces were fabricated at various potentials such as 20 V, 40 V and 60 V on Ti15Mo alloy by anodic oxidation (AO) technique. Uniform elemental distributions were obtained across all surfaces. In particular, the nanotube surfaces produced at 60 V showed hydrophilic behavior whereas the flat and nanotube surfaces produced at 20 V and 40 V were hydrophobic, respectively. The in vitro antibacterial activity of all surfaces against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria were investigated in detail. Compared to bare Ti15Mo alloys, the flat and TNTs surfaces indicated antibacterial activity. Furthermore, the antibacterial efficiency of TNTs produced on Ti15Mo alloy improved with increasing AO potential values.
这项研究的目的是调查新一代 Ti15Mo 合金上有序的 TiO2 纳米管（TNTs）表面的润湿性和抗菌性，以用于牙科和整形外科植入物。因此，通过阳极氧化（AO）技术，在 20 V、40 V 和 60 V 等不同电位下在 Ti15Mo 合金上制造出了有序的 TNTs 和平面氧化物表面。所有表面都获得了均匀的元素分布。尤其是在 60 V 电压下产生的纳米管表面具有亲水性，而在 20 V 和 40 V 电压下产生的平面和纳米管表面则分别具有疏水性。详细研究了所有表面对大肠杆菌（革兰氏阴性）和金黄色葡萄球菌（革兰氏阳性）的体外抗菌活性。与裸 Ti15Mo 合金相比，平面和 TNTs 表面具有抗菌活性。此外，Ti15Mo 合金上生成的 TNTs 的抗菌效率随着 AO 电位值的增加而提高。
{"title":"Surface characterization and antibacterial efficiency of TiO2 nanotubes on Ti15Mo alloy","authors":"Salih Durdu, Atasoy, Sitki Aktaş, E. Yalçın, K. Çavuşoğlu","doi":"10.1680/jsuin.24.00042","DOIUrl":"https://doi.org/10.1680/jsuin.24.00042","url":null,"abstract":"The aim of this work is to investigate wettability and antibacterial properties of the well-ordered TiO2 nanotube (TNTs) surfaces on new generation Ti15Mo alloys for dental and orthopedic implant applications. Thus, the well-ordered TNTs and flat oxide surfaces were fabricated at various potentials such as 20 V, 40 V and 60 V on Ti15Mo alloy by anodic oxidation (AO) technique. Uniform elemental distributions were obtained across all surfaces. In particular, the nanotube surfaces produced at 60 V showed hydrophilic behavior whereas the flat and nanotube surfaces produced at 20 V and 40 V were hydrophobic, respectively. The in vitro antibacterial activity of all surfaces against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria were investigated in detail. Compared to bare Ti15Mo alloys, the flat and TNTs surfaces indicated antibacterial activity. Furthermore, the antibacterial efficiency of TNTs produced on Ti15Mo alloy improved with increasing AO potential values.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141819788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, the Pulse-Reverse Current (PRC) electroplating technique was utilized to deposit Ni-Cu alloy coatings on the surface of Nd-Fe-B magnets. Compared with the Ni coating, the corrosion resistance of the Ni-Cu alloy coating has been significantly improved, with the corrosion potential Ecorr and the corrosion current density Icorr of -246 mV and 0.9 μA·cm-2, respectively. The results show that alloying can effectively prolong the incubation period of pitting nucleation and improve the self-healing ability of coating. The structure and microstructure of the coating show that the surface of the Ni-Cu coating is flat and the grains preferentially grow along the (111) close-packed surface, which also makes the coating have higher densification and significantly reduces the number of self-corrosion sites and corrosion tendency of the coating. The lower binding energy Cu2O produced by Ni-Cu coatings at the initial corrosion stage can reduce the formation of metal cation holes and prolong the incubation period of pitting corrosion. After pitting formation, the corrosion products Cu2O and Cu2(OH)3Cl of Cu in the pitting hole have a certain hindrance to corrosion and are conducive to promoting passive reconstruction, which is an important reason for the Ni-Cu alloy coating shows higher self-healing ability and higher corrosion resistance.
{"title":"Corrosion behavior and strengthening mechanism of Ni-Cu alloy coating on Nd-Fe-B magnets","authors":"Jiaxin Long, Xuefeng Xie, Yuxin Cai, Shuwei Zhong, Sangen Luo, Weilong Zhang, Munan Yang","doi":"10.1680/jsuin.24.00025","DOIUrl":"https://doi.org/10.1680/jsuin.24.00025","url":null,"abstract":"In this paper, the Pulse-Reverse Current (PRC) electroplating technique was utilized to deposit Ni-Cu alloy coatings on the surface of Nd-Fe-B magnets. Compared with the Ni coating, the corrosion resistance of the Ni-Cu alloy coating has been significantly improved, with the corrosion potential Ecorr and the corrosion current density Icorr of -246 mV and 0.9 μA·cm-2, respectively. The results show that alloying can effectively prolong the incubation period of pitting nucleation and improve the self-healing ability of coating. The structure and microstructure of the coating show that the surface of the Ni-Cu coating is flat and the grains preferentially grow along the (111) close-packed surface, which also makes the coating have higher densification and significantly reduces the number of self-corrosion sites and corrosion tendency of the coating. The lower binding energy Cu2O produced by Ni-Cu coatings at the initial corrosion stage can reduce the formation of metal cation holes and prolong the incubation period of pitting corrosion. After pitting formation, the corrosion products Cu2O and Cu2(OH)3Cl of Cu in the pitting hole have a certain hindrance to corrosion and are conducive to promoting passive reconstruction, which is an important reason for the Ni-Cu alloy coating shows higher self-healing ability and higher corrosion resistance.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141820883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Emelyanenko, Pooyan Makvandi, Madineh Moradialvand, L. Boinovich
The use of materials with extreme wettability discussed in this brief review may become one of the most promising strategies to combat the spreading of bacterial infections through touch surfaces not only in medical facilities but also in public areas, including educational institutions, supermarkets, fitness centers, etc. The extreme wettability coatings have both a nonspecific bactericidal effect against various types of bacteria, and a number of more specific mechanisms that work against certain strains depending on the type of metal. At the same time, such coatings are effective against various ways of spreading the bacterial cells, be it through the deposition of an aerosol created when patients cough or sneeze, or through contact transfer by patients’ hands. In this review, we briefly summarize the existing strategies for producing materials with extreme wettability by aqueous media and overview their main characteristics. Then the mechanisms behind the bactericidal effect of these materials are discussed in detail jointly with the analysis of some examples of testing the antibacterial efficiency of extreme wettability surfaces.
{"title":"Harnessing Extreme Wettability: Combatting Spread of Bacterial Infections in Healthcare","authors":"A. Emelyanenko, Pooyan Makvandi, Madineh Moradialvand, L. Boinovich","doi":"10.1680/jsuin.24.00048","DOIUrl":"https://doi.org/10.1680/jsuin.24.00048","url":null,"abstract":"The use of materials with extreme wettability discussed in this brief review may become one of the most promising strategies to combat the spreading of bacterial infections through touch surfaces not only in medical facilities but also in public areas, including educational institutions, supermarkets, fitness centers, etc. The extreme wettability coatings have both a nonspecific bactericidal effect against various types of bacteria, and a number of more specific mechanisms that work against certain strains depending on the type of metal. At the same time, such coatings are effective against various ways of spreading the bacterial cells, be it through the deposition of an aerosol created when patients cough or sneeze, or through contact transfer by patients’ hands. In this review, we briefly summarize the existing strategies for producing materials with extreme wettability by aqueous media and overview their main characteristics. Then the mechanisms behind the bactericidal effect of these materials are discussed in detail jointly with the analysis of some examples of testing the antibacterial efficiency of extreme wettability surfaces.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Daniel Hermenégildo Castillo López, Adrián Sosa Domínguez, J. J. P. Pérez Bueno, G. T. Córdova, David Meneses Rodríguez, José Santos Cruz, Sandra Andrea Mayén Hernández, Juan Manuel Olivares Ramírez
This work investigates a double-layer configuration for the black Ni-P layers used in solar adsorption technology, aiming to increase the absorption of a broader range of solar wavelengths. This multilayer configuration has a surface with increased roughness and absorption area. The valleys were porous materials, which were connected to an underlying metallic sub-layer that is susceptible to corrosion. In turn, this corrosion induced changes to the top layer. The Ni-P layer was deposited by the electroless technique using an acid nickel sulfate bath as a source of metal ions and a reducing agent of sodium hypophosphite. Etching initiated an oxidation process on the surface, forming a layer of amorphous black nickel oxide for absorption. The surface features of the black Ni-P double layer consist of an uneven surface that aids sunlight adsorption. Carbon steel (AISI 1018) with different surface finishes was used for depositing Ni-P and black Ni-P, aiming to establish correlations with solar adsorption. The sample with an increased surface roughness obtained a higher absorption percentage than a single layer. The corrosion rate was calculated as 7 mmpy for the black Ni-P layer by applying polarization curves. A 6 µm-thick Ni-P double layer was obtained, achieving 96% absorption within the 300–2,000 nm range.
{"title":"Selective double-layer on black Ni-P enhances solar absorption and reduces corrosion","authors":"Daniel Hermenégildo Castillo López, Adrián Sosa Domínguez, J. J. P. Pérez Bueno, G. T. Córdova, David Meneses Rodríguez, José Santos Cruz, Sandra Andrea Mayén Hernández, Juan Manuel Olivares Ramírez","doi":"10.1680/jsuin.24.00033","DOIUrl":"https://doi.org/10.1680/jsuin.24.00033","url":null,"abstract":"This work investigates a double-layer configuration for the black Ni-P layers used in solar adsorption technology, aiming to increase the absorption of a broader range of solar wavelengths. This multilayer configuration has a surface with increased roughness and absorption area. The valleys were porous materials, which were connected to an underlying metallic sub-layer that is susceptible to corrosion. In turn, this corrosion induced changes to the top layer. The Ni-P layer was deposited by the electroless technique using an acid nickel sulfate bath as a source of metal ions and a reducing agent of sodium hypophosphite. Etching initiated an oxidation process on the surface, forming a layer of amorphous black nickel oxide for absorption. The surface features of the black Ni-P double layer consist of an uneven surface that aids sunlight adsorption. Carbon steel (AISI 1018) with different surface finishes was used for depositing Ni-P and black Ni-P, aiming to establish correlations with solar adsorption. The sample with an increased surface roughness obtained a higher absorption percentage than a single layer. The corrosion rate was calculated as 7 mmpy for the black Ni-P layer by applying polarization curves. A 6 µm-thick Ni-P double layer was obtained, achieving 96% absorption within the 300–2,000 nm range.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141669199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A highly flexible electrode was fabricated using eutectic gallium-indium (eGaIn) liquid metal combined with an ultraviolet (UV)-curable polyurethane acrylate (PUA) polymer. The eGaIn liquid metal electrodes prepared by a negative-type direct patterning technique using a UV pulse laser can eliminate the need for complex photolithography masks. The optimal UV pulsed laser peak fluence was ∼1.43 J/cm2 to pattern and sinter the eGaIn/PUA composite electrode simultaneously. The laser-patterned eGaIn/PUA composite electrode under the optimal laser condition exhibited a remarkable electrical conductivity of 6.33 × 105 S/m with a patterning resolution of ∼40 μm. Moreover, the resistance of the electrode only deteriorated by 0.95% after 50,000 cycles of severe cyclic folding at a peak strain of 2.5% with a bending radius of 1 mm, demonstrating its exceptional flexibility and durability. These easily patterned eGaIn flexible electrodes via direct laser patterning techniques hold great promise for applications in wearable and flexible electronic devices that require extreme flexibility.
{"title":"Highly flexible liquid metal/photocurable polymer electrodes via direct laser patterning","authors":"Su-Jeong Park, Hana Lim, Chanwoo Yang","doi":"10.1680/jsuin.24.00023","DOIUrl":"https://doi.org/10.1680/jsuin.24.00023","url":null,"abstract":"A highly flexible electrode was fabricated using eutectic gallium-indium (eGaIn) liquid metal combined with an ultraviolet (UV)-curable polyurethane acrylate (PUA) polymer. The eGaIn liquid metal electrodes prepared by a negative-type direct patterning technique using a UV pulse laser can eliminate the need for complex photolithography masks. The optimal UV pulsed laser peak fluence was ∼1.43 J/cm2 to pattern and sinter the eGaIn/PUA composite electrode simultaneously. The laser-patterned eGaIn/PUA composite electrode under the optimal laser condition exhibited a remarkable electrical conductivity of 6.33 × 105 S/m with a patterning resolution of ∼40 μm. Moreover, the resistance of the electrode only deteriorated by 0.95% after 50,000 cycles of severe cyclic folding at a peak strain of 2.5% with a bending radius of 1 mm, demonstrating its exceptional flexibility and durability. These easily patterned eGaIn flexible electrodes via direct laser patterning techniques hold great promise for applications in wearable and flexible electronic devices that require extreme flexibility.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Al-Yousef, A. Atta, E. Abdeltwab, Nuha Al-Harbi, M. M. Abdelhamied, A. Henaish
The nanocomposites samples are made using the polymerization fabrication method to prepare the films consisting of iron III oxide (Fe2O3) and poly-4-chloroaniline P(4ClAni). The samples were characterized using the energy dispersive X-ray (EDX), X-ray diffraction (XRD), photoluminescence (PL) and Transmission electron microscope (TEM) to indicate the nanocomposites P(4ClAni)/Fe2O3 films were successfully fabricated. The EDX analysis confirmed the predicted chemical composition of P(4ClAni)/Fe2O3. The TEM showed spherical nanoparticles of Fe2O3 with approximately homogeneously and uniform sizes in between 30 and 40 nm. The effect of Fe2O3 on optical properties in wavelength range of 190 nm to 1200 nm has been recorded. The dispersion energy values for P(4ClAni) were found to be 0.72 eV increased to 0.81 eV, 0.96 eV and 1.21 eV, respectively, when the concentration of Fe2O3 increased from 3% to 6% and 9%. The relaxation time decrease from 4.46×10−6 s to 3.52×10−6 s as the concentration of Fe2O3 increases from 3% to 9%. Strong interactions between P(4ClAni) and Fe2O3 were supported by the obtained results of this work. The obtained data investigate the prepared P(4ClAni)/Fe2O3 nanocomposites can be applied in several areas of optoelectronics.
{"title":"Preparation, structural, surface characteristics and optical studies of hybrid nanomaterials for optical devices","authors":"H. Al-Yousef, A. Atta, E. Abdeltwab, Nuha Al-Harbi, M. M. Abdelhamied, A. Henaish","doi":"10.1680/jsuin.24.00027","DOIUrl":"https://doi.org/10.1680/jsuin.24.00027","url":null,"abstract":"The nanocomposites samples are made using the polymerization fabrication method to prepare the films consisting of iron III oxide (Fe2O3) and poly-4-chloroaniline P(4ClAni). The samples were characterized using the energy dispersive X-ray (EDX), X-ray diffraction (XRD), photoluminescence (PL) and Transmission electron microscope (TEM) to indicate the nanocomposites P(4ClAni)/Fe2O3 films were successfully fabricated. The EDX analysis confirmed the predicted chemical composition of P(4ClAni)/Fe2O3. The TEM showed spherical nanoparticles of Fe2O3 with approximately homogeneously and uniform sizes in between 30 and 40 nm. The effect of Fe2O3 on optical properties in wavelength range of 190 nm to 1200 nm has been recorded. The dispersion energy values for P(4ClAni) were found to be 0.72 eV increased to 0.81 eV, 0.96 eV and 1.21 eV, respectively, when the concentration of Fe2O3 increased from 3% to 6% and 9%. The relaxation time decrease from 4.46×10−6 s to 3.52×10−6 s as the concentration of Fe2O3 increases from 3% to 9%. Strong interactions between P(4ClAni) and Fe2O3 were supported by the obtained results of this work. The obtained data investigate the prepared P(4ClAni)/Fe2O3 nanocomposites can be applied in several areas of optoelectronics.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anfisa Ayalon, Fidaa El Zhalka, Alexander Rubowitz, P. Roy, S. Shoval, I. Legchenkova, E. Bormashenko
Perfluorocarbon liquids (PFCLs) are essential in ophthalmology due to their unique properties, such as higher density than water, inert chemical nature, and optical transparency. They serve as crucial tools in retinal detachment surgery, acting as both intraoperative aids and short-term tamponade agents. However, the interactions between PFCLs and the retinal surface are not fully understood, limiting insights into potential complications. This study investigates the interfacial interaction between perfluorodecalin (PFCL) and the retinal surface. Wetting behavior of animal retinas by water and PFCL was analyzed, revealing water droplets’ floating phenomenon in PFCL and calculating the critical radius for this effect. Dynamics of water spreading over the retina were examined. A model experiment demonstrated that water’s tendency to float over PFCL, interacting with a hydrophilic surface like the retina, could create traction and damage the retinal surface. These findings enhance our comprehension of physical processes at the PFCL/retina interface and offer practical insights for improving ophthalmic surgical procedures.
{"title":"Wetting of the retinal surface by perfluorocarbon liquid: implications for its use as an endotamponade agent and intraoperative tool in retinal detachment surgery","authors":"Anfisa Ayalon, Fidaa El Zhalka, Alexander Rubowitz, P. Roy, S. Shoval, I. Legchenkova, E. Bormashenko","doi":"10.1680/jsuin.24.00035","DOIUrl":"https://doi.org/10.1680/jsuin.24.00035","url":null,"abstract":"Perfluorocarbon liquids (PFCLs) are essential in ophthalmology due to their unique properties, such as higher density than water, inert chemical nature, and optical transparency. They serve as crucial tools in retinal detachment surgery, acting as both intraoperative aids and short-term tamponade agents. However, the interactions between PFCLs and the retinal surface are not fully understood, limiting insights into potential complications. This study investigates the interfacial interaction between perfluorodecalin (PFCL) and the retinal surface. Wetting behavior of animal retinas by water and PFCL was analyzed, revealing water droplets’ floating phenomenon in PFCL and calculating the critical radius for this effect. Dynamics of water spreading over the retina were examined. A model experiment demonstrated that water’s tendency to float over PFCL, interacting with a hydrophilic surface like the retina, could create traction and damage the retinal surface. These findings enhance our comprehension of physical processes at the PFCL/retina interface and offer practical insights for improving ophthalmic surgical procedures.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Li Wang, Jiacheng Qiu, Jianmin Feng, Lei Dong, Conglai Long, Dejun Li, Xiaowei Wang
Aluminum-ion batteries (AIBs), using commercial graphite as cathodes, stand out as promising secondary energy storage devices for industrial application. While exfoliating graphite to graphite nanosheets holds substantial theoretical potential for significantly enhancing AIBs battery performance, traditional redox strategies have the drawback of introducing defects and functional groups. In this work, graphite nanosheets exfoliated by supercritical carbon dioxide for high-performance aluminum-ion battery cathodes exfoliated by supercritical carbon dioxide (GNS-20) was firstly explored for AIB cathodes. Electrochemical tests show that the specific capacity of GNS-20 for AIB cathode was 152 mAh g−1 at a current density of 4 A g−1 during 1000 cycles, which was 1.9 times higher than that of natural graphite (NG) and 1.47 times higher than that of defect-rich reduced graphene oxide (rGO). Further, the regulation of the interlayer pore structure of GNS-20 proved instrumental in enhancing its AIB performance. Modulating the porosity of graphite nanosheets by adjusting the exfoliation pressure had a significant impact. The porosity of graphite nanosheets at an exfoliation pressure of 20 MPa was 86.7%. While the porosity at 15 MPa was 71.5% and 69.7% at 10 MPa, corresponding to capacities of 117 and 99 mAh g−1 (4 A g−1), respectively. This approach simplifies the process and aligns with environmental principles, offering significant potential for various graphite nanosheets applications.
使用商用石墨作为阴极的铝离子电池（AIBs）是一种很有前途的二次能量存储设备，可用于工业领域。虽然将石墨剥离成石墨纳米片具有显著提高铝离子电池性能的巨大理论潜力，但传统的氧化还原策略存在引入缺陷和官能团的缺点。在这项工作中，首次探索了将超临界二氧化碳剥离的石墨纳米片用于高性能铝离子电池阴极。电化学测试表明，在电流密度为 4 A g-1 时，GNS-20 用于 AIB 阴极的比容量为 152 mAh g-1，是天然石墨（NG）的 1.9 倍，是富缺陷还原氧化石墨烯（rGO）的 1.47 倍。此外，事实证明，调节 GNS-20 的层间孔隙结构有助于提高其 AIB 性能。通过调整剥离压力来调节石墨纳米片的孔隙率效果显著。剥离压力为 20 兆帕时，纳米石墨片的孔隙率为 86.7%。15 兆帕时的孔隙率为 71.5%，10 兆帕时为 69.7%，对应的容量分别为 117 mAh g-1 和 99 mAh g-1（4 A g-1）。这种方法简化了工艺，符合环保原则，为各种石墨纳米片的应用提供了巨大潜力。
{"title":"Graphite nanosheets exfoliated by supercritical carbon dioxide for high-performance aluminum-ion battery cathodes","authors":"Li Wang, Jiacheng Qiu, Jianmin Feng, Lei Dong, Conglai Long, Dejun Li, Xiaowei Wang","doi":"10.1680/jsuin.24.00024","DOIUrl":"https://doi.org/10.1680/jsuin.24.00024","url":null,"abstract":"Aluminum-ion batteries (AIBs), using commercial graphite as cathodes, stand out as promising secondary energy storage devices for industrial application. While exfoliating graphite to graphite nanosheets holds substantial theoretical potential for significantly enhancing AIBs battery performance, traditional redox strategies have the drawback of introducing defects and functional groups. In this work, graphite nanosheets exfoliated by supercritical carbon dioxide for high-performance aluminum-ion battery cathodes exfoliated by supercritical carbon dioxide (GNS-20) was firstly explored for AIB cathodes. Electrochemical tests show that the specific capacity of GNS-20 for AIB cathode was 152 mAh g−1 at a current density of 4 A g−1 during 1000 cycles, which was 1.9 times higher than that of natural graphite (NG) and 1.47 times higher than that of defect-rich reduced graphene oxide (rGO). Further, the regulation of the interlayer pore structure of GNS-20 proved instrumental in enhancing its AIB performance. Modulating the porosity of graphite nanosheets by adjusting the exfoliation pressure had a significant impact. The porosity of graphite nanosheets at an exfoliation pressure of 20 MPa was 86.7%. While the porosity at 15 MPa was 71.5% and 69.7% at 10 MPa, corresponding to capacities of 117 and 99 mAh g−1 (4 A g−1), respectively. This approach simplifies the process and aligns with environmental principles, offering significant potential for various graphite nanosheets applications.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140971599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reem Altuijri, E Abdeltwab, Nuha Al-Harbi, A. Atta, M. M. Abdel-Hamid, A. Henaish
In this study, flexible CA/PANI films, consisting of polyaniline (PANI) and cellulose acetate (CA), were created via a solution cast production process. Then, these films were irradiated using of handmade cold cathode ion device with argon fluence of 2x1017, 4x1017, and 6x1017 ions/cm2. The SRIM program was used to investigate the ion penetration depth, ion distribution in the composite and the energy stopping loss. Moreover, the FTIR technique was used to identify the changes of the treated CA/PANI. The UV-Vis technique was used to show the impact of argon beam on the optical characteristics of CA/PANI composite film. The oscillation energy (E0) dropped from 8.88 for CA/PANI to 7.83, 6.42, and 5.19 eV after exposed to 2x1017, 4x1017, and 6x1017 ions/cm2. The results showed that the ion altered the optical characteristics of the CA/PANI samples, which allow for applied these irradiated CA/PANI films in optoelectronic devices.
{"title":"Investigating ion irradiation effects for modifying optical properties of CA/PANI films","authors":"Reem Altuijri, E Abdeltwab, Nuha Al-Harbi, A. Atta, M. M. Abdel-Hamid, A. Henaish","doi":"10.1680/jsuin.24.00014","DOIUrl":"https://doi.org/10.1680/jsuin.24.00014","url":null,"abstract":"In this study, flexible CA/PANI films, consisting of polyaniline (PANI) and cellulose acetate (CA), were created via a solution cast production process. Then, these films were irradiated using of handmade cold cathode ion device with argon fluence of 2x1017, 4x1017, and 6x1017 ions/cm2. The SRIM program was used to investigate the ion penetration depth, ion distribution in the composite and the energy stopping loss. Moreover, the FTIR technique was used to identify the changes of the treated CA/PANI. The UV-Vis technique was used to show the impact of argon beam on the optical characteristics of CA/PANI composite film. The oscillation energy (E0) dropped from 8.88 for CA/PANI to 7.83, 6.42, and 5.19 eV after exposed to 2x1017, 4x1017, and 6x1017 ions/cm2. The results showed that the ion altered the optical characteristics of the CA/PANI samples, which allow for applied these irradiated CA/PANI films in optoelectronic devices.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140971272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It is highly desirable to construct a sustainable hybrid silica coating to enhance the flame retardant (FR) properties of polyester/cotton (T/C) blend fabrics. In this study, a novel urea phytate salt was synthesized and used to prepare a phosphorus/nitrogen-doped hybrid silica sol system. The hybrid silica coating was then applied to the T/C fabric to develop a highly efficient FR-coated T/C fabric with improved washing durability. The surface morphology, size distribution, and condensation degree of the hybrid silica sol particles were characterized. The thermal stability, heat release, flame retardancy, and mode of action of the coated T/C fabrics were also investigated. The coated T/C fabrics exhibited self-extinguishing performance, with the damaged length decreasing from 30 cm to 8.5 cm and the LOI increasing from 17.1% to 30%. The desirable flame retardancy of the coated T/C fabric was well maintained even after 10 washing cycles. The remarkably inhibited heat release ability suggested a decreased fire hazard. A potential condensed-phase flame retardancy mechanism was proposed based on TG and char residue analyses. This study presents an eco-friendly and efficient hybrid silica coating that effectively reduces the fire hazard of T/C fabrics.
{"title":"Hybrid sol-gel coatings doped with phytic acid-urea salt for fire protection of polyester/cotton blend fabrics","authors":"Shuang Dong, Lin-Xia Lu, Yi-Ting Huang, Bing Zhao, Jun Zhang, Xian-Wei Cheng, Jinying Guan","doi":"10.1680/jsuin.24.00038","DOIUrl":"https://doi.org/10.1680/jsuin.24.00038","url":null,"abstract":"It is highly desirable to construct a sustainable hybrid silica coating to enhance the flame retardant (FR) properties of polyester/cotton (T/C) blend fabrics. In this study, a novel urea phytate salt was synthesized and used to prepare a phosphorus/nitrogen-doped hybrid silica sol system. The hybrid silica coating was then applied to the T/C fabric to develop a highly efficient FR-coated T/C fabric with improved washing durability. The surface morphology, size distribution, and condensation degree of the hybrid silica sol particles were characterized. The thermal stability, heat release, flame retardancy, and mode of action of the coated T/C fabrics were also investigated. The coated T/C fabrics exhibited self-extinguishing performance, with the damaged length decreasing from 30 cm to 8.5 cm and the LOI increasing from 17.1% to 30%. The desirable flame retardancy of the coated T/C fabric was well maintained even after 10 washing cycles. The remarkably inhibited heat release ability suggested a decreased fire hazard. A potential condensed-phase flame retardancy mechanism was proposed based on TG and char residue analyses. This study presents an eco-friendly and efficient hybrid silica coating that effectively reduces the fire hazard of T/C fabrics.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：