X W Chen, S Tang, C Wu, W L Xie, M Zhang, D F Zhang
To improve the corrosion resistance of the Ti–0.3Mo–0.8Ni (TA10) titanium alloy, a micro-arc oxidation coating was prepared on its surface, and the effect of different amounts of graphite addition on the structure and corrosion resistance of the coatings was studied. Through methods such as X-ray diffraction phase analysis, microscopic morphology analysis, roughness analysis, coating thickness analysis and hardness testing, it was found that the added graphite particles can react with silicon (Si) in the electrolyte to promote the formation of the silicon carbide (SiC) phase, thereby improving the surface morphology of the coatings, increasing the thickness of the coatings and improving the microhardness of the coatings. At the same time, dynamic potential polarization curve and scanning electrochemical test results show that the formation of the silicon carbide phase can increase self-corrosion potential and reduce self-corrosion current density. When the amount of graphite added is 1.0 g/l, the self-corrosion potential and self-corrosion current density are −0.129 V and 2.9 × 10 −8 A/cm 2 , respectively. This indicates that adding graphite particles can enhance the corrosion resistance of the TA10 titanium alloy.
{"title":"Study on the structure and corrosion resistance of micro-arc oxidation coatings on TA10 titanium alloy with different graphite additions","authors":"X W Chen, S Tang, C Wu, W L Xie, M Zhang, D F Zhang","doi":"10.1680/jsuin.23.00040","DOIUrl":"https://doi.org/10.1680/jsuin.23.00040","url":null,"abstract":"To improve the corrosion resistance of the Ti–0.3Mo–0.8Ni (TA10) titanium alloy, a micro-arc oxidation coating was prepared on its surface, and the effect of different amounts of graphite addition on the structure and corrosion resistance of the coatings was studied. Through methods such as X-ray diffraction phase analysis, microscopic morphology analysis, roughness analysis, coating thickness analysis and hardness testing, it was found that the added graphite particles can react with silicon (Si) in the electrolyte to promote the formation of the silicon carbide (SiC) phase, thereby improving the surface morphology of the coatings, increasing the thickness of the coatings and improving the microhardness of the coatings. At the same time, dynamic potential polarization curve and scanning electrochemical test results show that the formation of the silicon carbide phase can increase self-corrosion potential and reduce self-corrosion current density. When the amount of graphite added is 1.0 g/l, the self-corrosion potential and self-corrosion current density are −0.129 V and 2.9 × 10 −8 A/cm 2 , respectively. This indicates that adding graphite particles can enhance the corrosion resistance of the TA10 titanium alloy.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547284","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}
Mohamed Rabia, Asmaa M Elsayed, Maha Abdallah Alnuwaiser
The Mn(IV) oxide/Mn(IV) sulfide/poly-2-amino-1-mercaptobenzene (MnO 2 -MnS 2 /P2AMB) nanocomposite is prepared through a polymerization reaction (oxidation) and is utilized as a highly photo-electrocatalytic material for green hydrogen generation from sewage water. The MnO 2 -MnS 2 /P2AMB nanocomposite demonstrates remarkable optical properties, characterized by a bandgap of 1.81 eV. To promote the water splitting reaction by the synthesized MnO 2 -MnS 2 /P2AMB nanocomposite photoelectrode, sewage water is utilized as a sacrificial agent to effectively facilitate the generation of hydrogen gas through the evaluation of the current (J ph ). At −0.9 V, the J ph and J o values are determined to be −0.33 and −0.2 mA.cm -2 , correspondingly. Notably, the optimum J ph value of −0.26 mA.cm −2 is observed for incidence photons at 340 nm, indicating that light with higher frequency and energy leads to the generation of more electrons from the MnO 2 -MnS 2 /P2AMB nanocomposite and subsequent hydrogen production. Conversely, the lowest J ph value of −0.21 mA.cm −2 is obtained at 730 nm, suggesting the influence of infrared waves on the photoelectrode due to the small bandgap (1.86 eV) of the materials, as calculated in a previous analysis. This study represents an initial step towards the conversion of wastewater into hydrogen gas, which can serve as a sustainable fuel source for various industrial applications.
{"title":"Mn(IV) oxide/Mn(IV) sulfide/poly-2-amino-1-mercaptobenzene for green hydrogen generation from sewage water through the photoelectrocatalytic process","authors":"Mohamed Rabia, Asmaa M Elsayed, Maha Abdallah Alnuwaiser","doi":"10.1680/jsuin.23.00031","DOIUrl":"https://doi.org/10.1680/jsuin.23.00031","url":null,"abstract":"The Mn(IV) oxide/Mn(IV) sulfide/poly-2-amino-1-mercaptobenzene (MnO 2 -MnS 2 /P2AMB) nanocomposite is prepared through a polymerization reaction (oxidation) and is utilized as a highly photo-electrocatalytic material for green hydrogen generation from sewage water. The MnO 2 -MnS 2 /P2AMB nanocomposite demonstrates remarkable optical properties, characterized by a bandgap of 1.81 eV. To promote the water splitting reaction by the synthesized MnO 2 -MnS 2 /P2AMB nanocomposite photoelectrode, sewage water is utilized as a sacrificial agent to effectively facilitate the generation of hydrogen gas through the evaluation of the current (J ph ). At −0.9 V, the J ph and J o values are determined to be −0.33 and −0.2 mA.cm -2 , correspondingly. Notably, the optimum J ph value of −0.26 mA.cm −2 is observed for incidence photons at 340 nm, indicating that light with higher frequency and energy leads to the generation of more electrons from the MnO 2 -MnS 2 /P2AMB nanocomposite and subsequent hydrogen production. Conversely, the lowest J ph value of −0.21 mA.cm −2 is obtained at 730 nm, suggesting the influence of infrared waves on the photoelectrode due to the small bandgap (1.86 eV) of the materials, as calculated in a previous analysis. This study represents an initial step towards the conversion of wastewater into hydrogen gas, which can serve as a sustainable fuel source for various industrial applications.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135199671","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}
This study aims to improve the wear resistance of nitrile butadiene rubber (NBR) by depositing diamond-like carbon (DLC) films using Direct Current Magnetron Sputtering (DC-MS), a simple and cost-effective technique. DC-MS is a coating process that uses a direct current to generate an electric field and sputter conductive materials from a target to a substrate. A magnetic field enhances the plasma density and sputtering rate. The study examines the bonding force, surface morphology, tribological properties, and mechanical strength of DLC. Scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy are used to characterize the cross-sectional morphology, structural features, and chemical bonding species of DLC films and NBR substrates. Nanoindentation results show that varying the power has no significant effect on hardness and Young’s modulus. Tribological tests are conducted under ambient conditions using a ball-and-disk tribometer, with a fixed load of 0.3 N. Results indicate that the power of DLC films influences their tribological properties. Specifically, DLC films prepared at 120 W exhibit superior tribological properties, maintaining a stable coefficient of friction (CoF) below 0.2 for the test duration. These findings have promising implications for their application.
{"title":"Effects of power on tribological and mechanical properties of diamond-like carbon film modified nitrile butadiene rubber","authors":"Changxin Han, Jiaqi Liu, Huatang Cao, T. Yang, Zhiyu Wu, Qiaoyuan Deng, Feng Wen","doi":"10.1680/jsuin.23.00028","DOIUrl":"https://doi.org/10.1680/jsuin.23.00028","url":null,"abstract":"This study aims to improve the wear resistance of nitrile butadiene rubber (NBR) by depositing diamond-like carbon (DLC) films using Direct Current Magnetron Sputtering (DC-MS), a simple and cost-effective technique. DC-MS is a coating process that uses a direct current to generate an electric field and sputter conductive materials from a target to a substrate. A magnetic field enhances the plasma density and sputtering rate. The study examines the bonding force, surface morphology, tribological properties, and mechanical strength of DLC. Scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy are used to characterize the cross-sectional morphology, structural features, and chemical bonding species of DLC films and NBR substrates. Nanoindentation results show that varying the power has no significant effect on hardness and Young’s modulus. Tribological tests are conducted under ambient conditions using a ball-and-disk tribometer, with a fixed load of 0.3 N. Results indicate that the power of DLC films influences their tribological properties. Specifically, DLC films prepared at 120 W exhibit superior tribological properties, maintaining a stable coefficient of friction (CoF) below 0.2 for the test duration. These findings have promising implications for their application.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47155022","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}
Yuheng Li, Yuyang Zhou, Ziheng Wang, Zhenjing Duan, Yukai Gu, Yang Chen, Shuaishuai Wang, Faze Chen, Xin Liu, Jiyu Liu
In this paper, we investigate the wettability change of APCP-treated PTFE surfaces with time under different storage temperatures and pressures, and the results indicate that low temperature can hinder the wettability recovery. After storing for 5 days, WCA of PTFE stored under room temperature (25°C) recovered from 19 ± 2° to 54 ± 2°, while the WCA of PTFE stored under low temperature (−10°C) just increased to 42 ± 3°. Then, the mechanism contributing to the slower wettability recovery was investigated by analyzing surface chemical compositions via X-ray photoelectron spectroscopy (XPS) and observing surface morphologies using atomic force microscope (AFM). After 15 days storage, the contents of O and N decreased obviously, while F content increased. The F content of sample stored under low temperature was 20% less than that stored under room temperature. By contrast, surface micro-morphologies remained unchanged during storage, and the surface roughness Ra of each sample was around 7 nm. Finally, peel strength tests were conducted on APCP-treated PTFE surfaces stored under different temperatures, and the surfaces stored under low temperature maintained better adhesive property; after 15 days of storage, the adhesive strength could still reach 400 N/m, which was 376% higher than that of the untreated surface. The research results are expected to significantly facilitate practical applications of APCP modification and PTFE surfaces.
{"title":"Stability of cold plasma improved wettability and adhesive property of polytetrafluoroethylene surface","authors":"Yuheng Li, Yuyang Zhou, Ziheng Wang, Zhenjing Duan, Yukai Gu, Yang Chen, Shuaishuai Wang, Faze Chen, Xin Liu, Jiyu Liu","doi":"10.1680/jsuin.23.00045","DOIUrl":"https://doi.org/10.1680/jsuin.23.00045","url":null,"abstract":"In this paper, we investigate the wettability change of APCP-treated PTFE surfaces with time under different storage temperatures and pressures, and the results indicate that low temperature can hinder the wettability recovery. After storing for 5 days, WCA of PTFE stored under room temperature (25°C) recovered from 19 ± 2° to 54 ± 2°, while the WCA of PTFE stored under low temperature (−10°C) just increased to 42 ± 3°. Then, the mechanism contributing to the slower wettability recovery was investigated by analyzing surface chemical compositions via X-ray photoelectron spectroscopy (XPS) and observing surface morphologies using atomic force microscope (AFM). After 15 days storage, the contents of O and N decreased obviously, while F content increased. The F content of sample stored under low temperature was 20% less than that stored under room temperature. By contrast, surface micro-morphologies remained unchanged during storage, and the surface roughness Ra of each sample was around 7 nm. Finally, peel strength tests were conducted on APCP-treated PTFE surfaces stored under different temperatures, and the surfaces stored under low temperature maintained better adhesive property; after 15 days of storage, the adhesive strength could still reach 400 N/m, which was 376% higher than that of the untreated surface. The research results are expected to significantly facilitate practical applications of APCP modification and PTFE surfaces.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44174559","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}
Flexible PVA/PANI/Ag nanocomposite consisting of polyaniline (PANI) and silver nanoparticles (AgNPs) with Polyvinyl alcohol (PVA) were successful fabricated using casting method to applied in storage energy devices. The surface characteristics of the composite films were analyzed using XRD, DSC, and FTIR techniques. The estimated crystallite size of AgNPs is 11.7 nm increased to 15.3 nm by enhancing Ag from 2% to 4%. In addition, the morphology of the films is investigated utilizing SEM. The conductivity σdc is improved from 4.8x10−11 S.cm−1 for PVA to 1.3x10−10 S.cm−1 for PVA/PANI and to 1.2x10−9 S.cm−1 for PVA/PANI/Ag. Furthermore, by increasing the temperature value, the electrical resistance is reduced, besides, the activation energy is modified with addition of PANI and Ag in PVA matrix. The PVA/PANI/Ag are irradiated with hydrogen fluence 0.4x1018, 0.8x1018, and 1.2x1018 ions/cm2. The σac is enhanced from 2.67x10−9 S/cm for PVA/PANI/Ag to 2.02x10−8 S/cm for 0.4x1018 ions/cm2 and to 3.95x10−6 S/cm 1.2x1018 ions/cm2. Moreover, the dielectric constant increased of 0.43 for PVA/PANI/Ag to 0.56, 1.23, and 4.18 when are exposed to 0.4x1018, 0.8x1018, and 1.2x1018 ions.cm−2, respectively. The results showed modifications in electrical characteristics of the the irradiated composite, which open the way for applying these samples in wide range of dielectric applications.
{"title":"Fabrication, surface characterization and electrical properties of hydrogen irradiated nanocomposite materials","authors":"N. Alsaif, A. Atta, E. Abdeltwab, M. Abdel-Hamid","doi":"10.1680/jsuin.23.00030","DOIUrl":"https://doi.org/10.1680/jsuin.23.00030","url":null,"abstract":"Flexible PVA/PANI/Ag nanocomposite consisting of polyaniline (PANI) and silver nanoparticles (AgNPs) with Polyvinyl alcohol (PVA) were successful fabricated using casting method to applied in storage energy devices. The surface characteristics of the composite films were analyzed using XRD, DSC, and FTIR techniques. The estimated crystallite size of AgNPs is 11.7 nm increased to 15.3 nm by enhancing Ag from 2% to 4%. In addition, the morphology of the films is investigated utilizing SEM. The conductivity σdc is improved from 4.8x10−11 S.cm−1 for PVA to 1.3x10−10 S.cm−1 for PVA/PANI and to 1.2x10−9 S.cm−1 for PVA/PANI/Ag. Furthermore, by increasing the temperature value, the electrical resistance is reduced, besides, the activation energy is modified with addition of PANI and Ag in PVA matrix. The PVA/PANI/Ag are irradiated with hydrogen fluence 0.4x1018, 0.8x1018, and 1.2x1018 ions/cm2. The σac is enhanced from 2.67x10−9 S/cm for PVA/PANI/Ag to 2.02x10−8 S/cm for 0.4x1018 ions/cm2 and to 3.95x10−6 S/cm 1.2x1018 ions/cm2. Moreover, the dielectric constant increased of 0.43 for PVA/PANI/Ag to 0.56, 1.23, and 4.18 when are exposed to 0.4x1018, 0.8x1018, and 1.2x1018 ions.cm−2, respectively. The results showed modifications in electrical characteristics of the the irradiated composite, which open the way for applying these samples in wide range of dielectric applications.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44704081","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}
Asad Masood, Naeem Ahmed, MF Mohd Razip Wee, Muhammad ASM Haniff, Ebrahim Mahmoudi, Anuttam Patra, Kim S Siow
The production of suitable coatings with excellent antibacterial performance has now become a viable technique for enhancing the functional qualities of various biomedical materials. Here, pulsed plasma polymerisation was used to produce an antibacterial coating from the carvone oil of the spearmint plant. The coating films have adjustable chemical and physical properties based on the deposition parameter – that is, duty cycle (DC). The static water contact angle (WCA) values of pulsed wave (PW) plasma-polymerised carvone (ppCar) increase with the increase in DC. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed that the molecular structure of carvone is less fragmented, retaining moieties associated with C–O and C=O when the DC is reduced. These C–O and C=O moieties likely reduced the measured static WCA. This surface chemical composition with predominantly C–O and C=O also showed a stronger bactericidal effect, based on the biofilm assay with bacteria (Escherichia coli and Staphylococcus aureus), compared with those coatings with C–C and C–H produced at a higher DC. As shown by the atomic force microscopy images, a lower DC resulted in smoother and more homogeneous coatings than those produced with a higher DC, while field emission scanning electron microscopy images show that when E. coli and S. aureus membranes were attached to PW ppCar, they ruptured and distorted with a pore created and that these distortions and ruptures increased as the DC was reduced.
{"title":"Pulsed plasma polymerisation of carvone: characterisations and antibacterial properties","authors":"Asad Masood, Naeem Ahmed, MF Mohd Razip Wee, Muhammad ASM Haniff, Ebrahim Mahmoudi, Anuttam Patra, Kim S Siow","doi":"10.1680/jsuin.22.00042","DOIUrl":"https://doi.org/10.1680/jsuin.22.00042","url":null,"abstract":"The production of suitable coatings with excellent antibacterial performance has now become a viable technique for enhancing the functional qualities of various biomedical materials. Here, pulsed plasma polymerisation was used to produce an antibacterial coating from the carvone oil of the spearmint plant. The coating films have adjustable chemical and physical properties based on the deposition parameter – that is, duty cycle (DC). The static water contact angle (WCA) values of pulsed wave (PW) plasma-polymerised carvone (ppCar) increase with the increase in DC. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed that the molecular structure of carvone is less fragmented, retaining moieties associated with C–O and C=O when the DC is reduced. These C–O and C=O moieties likely reduced the measured static WCA. This surface chemical composition with predominantly C–O and C=O also showed a stronger bactericidal effect, based on the biofilm assay with bacteria (Escherichia coli and Staphylococcus aureus), compared with those coatings with C–C and C–H produced at a higher DC. As shown by the atomic force microscopy images, a lower DC resulted in smoother and more homogeneous coatings than those produced with a higher DC, while field emission scanning electron microscopy images show that when E. coli and S. aureus membranes were attached to PW ppCar, they ruptured and distorted with a pore created and that these distortions and ruptures increased as the DC was reduced.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135114544","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}
Yalong Liu, B. Xin, Zhuoming Chen, Yingqi Xu, Yan Liu, Lifeng Li, Qitong Jiang, Md All Amin Newton
Titanium dioxide (TiO2) is widely regarded as one of the most extensively applied photocatalytic semiconductor materials. However, conventional powdered titanium dioxide exhibits certain limitations, including relatively weak light absorption capability, a small surface area and insufficient active sites. This study successfully prepared flexible and porous silicon dioxide (SiO2)–titanium dioxide nanofiber membranes (NFMs) by implementing electrospinning technology and calcination processes. The porous membranes demonstrate remarkable performance in water treatment, featuring a high specific surface area (49 m2/g) and porosity, enabling efficient adsorption and removal of organic pollutants in water. Remarkably, the NFMs-800 variant exhibits outstanding photocatalytic performance, achieving complete removal of adsorbed organic compounds under ultraviolet irradiation. The design and fabrication methods of this porous membrane are simple and scalable, providing a potential solution for practical water-treatment applications. Consequently, the silicon dioxide–titanium dioxide porous membrane holds significant prospects in the field of water treatment, offering a promising contribution to the attainment of efficient and sustainable water resource management.
{"title":"Enhanced degradation of methylene blue dye using flexible SiO2–TiO2 nanofiber membranes","authors":"Yalong Liu, B. Xin, Zhuoming Chen, Yingqi Xu, Yan Liu, Lifeng Li, Qitong Jiang, Md All Amin Newton","doi":"10.1680/jsuin.23.00025","DOIUrl":"https://doi.org/10.1680/jsuin.23.00025","url":null,"abstract":"Titanium dioxide (TiO2) is widely regarded as one of the most extensively applied photocatalytic semiconductor materials. However, conventional powdered titanium dioxide exhibits certain limitations, including relatively weak light absorption capability, a small surface area and insufficient active sites. This study successfully prepared flexible and porous silicon dioxide (SiO2)–titanium dioxide nanofiber membranes (NFMs) by implementing electrospinning technology and calcination processes. The porous membranes demonstrate remarkable performance in water treatment, featuring a high specific surface area (49 m2/g) and porosity, enabling efficient adsorption and removal of organic pollutants in water. Remarkably, the NFMs-800 variant exhibits outstanding photocatalytic performance, achieving complete removal of adsorbed organic compounds under ultraviolet irradiation. The design and fabrication methods of this porous membrane are simple and scalable, providing a potential solution for practical water-treatment applications. Consequently, the silicon dioxide–titanium dioxide porous membrane holds significant prospects in the field of water treatment, offering a promising contribution to the attainment of efficient and sustainable water resource management.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46732905","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}
The coalescence characteristics of two vibrated droplets at a certain distance on a microstructured surface with gradient wettability are investigated by a high-speed camera in this work. The results show that the volume ratio of the two droplets has a significant effect on the vibration modes. With the change of the volume ratio, the droplet exhibits different vibration modes, such as the pumping mode (PM), the rocking mode (RM), or the pumping-rocking mixed mode (PRM). In addition, the coalescence time of the two droplets varies with the volume ratio. When the volume ratio is close to 1, the two vibrated droplets are in synchronous pumping mode (SPM) and the coalescence time is the shortest. When the volume ratio is far away from 1, the two droplets may show the rocking mode (RM), the asynchronous pumping mode (APM), or the pumping-rocking mixed mode (PRM). At this point, the coalescence time gets increased, especially for the small volume ratios. Finally, the movement characteristics of the three-phase contact lines are discussed, and a theoretical model is proposed to analyze the coalescence process. This work provides a new method to remove droplets rapidly, which is essential to enhance the heat transfer performance of dropwise condensation.
{"title":"Coalescence characteristics of vibrated drops on a wettability gradient surface","authors":"Feng Chen, Zhi-hai Jia, Yong Deng","doi":"10.1680/jsuin.23.00012","DOIUrl":"https://doi.org/10.1680/jsuin.23.00012","url":null,"abstract":"The coalescence characteristics of two vibrated droplets at a certain distance on a microstructured surface with gradient wettability are investigated by a high-speed camera in this work. The results show that the volume ratio of the two droplets has a significant effect on the vibration modes. With the change of the volume ratio, the droplet exhibits different vibration modes, such as the pumping mode (PM), the rocking mode (RM), or the pumping-rocking mixed mode (PRM). In addition, the coalescence time of the two droplets varies with the volume ratio. When the volume ratio is close to 1, the two vibrated droplets are in synchronous pumping mode (SPM) and the coalescence time is the shortest. When the volume ratio is far away from 1, the two droplets may show the rocking mode (RM), the asynchronous pumping mode (APM), or the pumping-rocking mixed mode (PRM). At this point, the coalescence time gets increased, especially for the small volume ratios. Finally, the movement characteristics of the three-phase contact lines are discussed, and a theoretical model is proposed to analyze the coalescence process. This work provides a new method to remove droplets rapidly, which is essential to enhance the heat transfer performance of dropwise condensation.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46529075","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}
S. Adeel, Adnan Mumtaz, Rony Mia, Muhammad Aftab, Muhammad Hussaan, N. Amin, S. Khan, S. Khattak
The use of natural colorants in modern dye factories is a potential green chemistry idea that should be widely promoted in order to minimize the wool dyeing’s dependency on some hazardous and non-biodegradable synthetic colors. In this study, an effort was undertaken to see if Rheum Emodi (Rhubarb) extract might be used as a natural dye for wool dyeing for the replacement of synthetic dyes. The dyeing of wool fabric was carried out using microwave (MW) rays’ treatment. By combining several mordants, a stunning color pallet of shades of varying hue and tone was created. Comparative evaluation of the effects of various chemical mordants (aluminum salt, iron salt, tannic acid, and cream of tartar) and bio mordants (pomegranate extract, and pine nut hull extract) on the characteristics of dyed wool samples was carried out to choose the best mordant for each application. It was found that MW treated wool fabric using bio mordant shown higher color fastness value of 4/5 to 5 and color strength value of approximately 10 to 20 rather than using metallic mordant. Scanning electron microscopy (SEM) photographs and Fourier transform infrared spectroscopy (FT-IR) analyses revealed the difference between irradiated and un-irradiated wool fabric. The employment of MW rays and bio-mordants in the natural coloring of wool fabric is encouraged due to their biocompatibility and non-toxicity when combined with MW treatment of wool fabric, as well as their high color fastness and color strength performances. As a result, the naturally extracted dyes from rhubarb can be the replacement of synthetic dyes for the coloration of wool fabric in the textile industry due to their environmental issues.
{"title":"Microwave-assisted sustainable coloration of wool fabric using Rheum Emodi based natural dye","authors":"S. Adeel, Adnan Mumtaz, Rony Mia, Muhammad Aftab, Muhammad Hussaan, N. Amin, S. Khan, S. Khattak","doi":"10.1680/jsuin.23.00021","DOIUrl":"https://doi.org/10.1680/jsuin.23.00021","url":null,"abstract":"The use of natural colorants in modern dye factories is a potential green chemistry idea that should be widely promoted in order to minimize the wool dyeing’s dependency on some hazardous and non-biodegradable synthetic colors. In this study, an effort was undertaken to see if Rheum Emodi (Rhubarb) extract might be used as a natural dye for wool dyeing for the replacement of synthetic dyes. The dyeing of wool fabric was carried out using microwave (MW) rays’ treatment. By combining several mordants, a stunning color pallet of shades of varying hue and tone was created. Comparative evaluation of the effects of various chemical mordants (aluminum salt, iron salt, tannic acid, and cream of tartar) and bio mordants (pomegranate extract, and pine nut hull extract) on the characteristics of dyed wool samples was carried out to choose the best mordant for each application. It was found that MW treated wool fabric using bio mordant shown higher color fastness value of 4/5 to 5 and color strength value of approximately 10 to 20 rather than using metallic mordant. Scanning electron microscopy (SEM) photographs and Fourier transform infrared spectroscopy (FT-IR) analyses revealed the difference between irradiated and un-irradiated wool fabric. The employment of MW rays and bio-mordants in the natural coloring of wool fabric is encouraged due to their biocompatibility and non-toxicity when combined with MW treatment of wool fabric, as well as their high color fastness and color strength performances. As a result, the naturally extracted dyes from rhubarb can be the replacement of synthetic dyes for the coloration of wool fabric in the textile industry due to their environmental issues.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48378512","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}
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