Reem Altuijri, M. M. Abdelhamied, A. Atta, Nuha Al-Harbi, A. Henaish
In this study, the casting prepration technique is applied to produce flexible CA/PANI composite films. The CA/PANI samples which are composed of polyaniline (PANI) and cellulose acetate (CA) are directed to applied in electrical storage devices. The XRD, FTIR, TEM, Ramman and SEM techniques were employed for analyzing the produced films. The TEM show the PANI were formed with the particle size less than 100 nm. Next, argon-ion beam with varying fluencies (4x1014, 8x1014 and 12x1014 ions/cm2) bombard the CA/PANI samples. In frequency of 20 Hz to 5.5 MHz, the dielectric properties of CA/PANI were significantly altered by argon beam treatment. The irradiated sample by 12x1014 ions/cm−2 at frequency 50 Hz resulted in an improvement in the dielectric constant ε′ from 36.4 for the unirradiated CA/PANI to 108.6. Additionally, the relaxation time decreased from 1.63x10−4 sec to 2.08x10−5 sec. The results of this work open the ways for using the irradiated CA/PANI in a number of devices, such as supercapacitors and batteries.
{"title":"Enhancing the dielectric characteristics of argon beam irradiated polymer composite films","authors":"Reem Altuijri, M. M. Abdelhamied, A. Atta, Nuha Al-Harbi, A. Henaish","doi":"10.1680/jsuin.24.00003","DOIUrl":"https://doi.org/10.1680/jsuin.24.00003","url":null,"abstract":"In this study, the casting prepration technique is applied to produce flexible CA/PANI composite films. The CA/PANI samples which are composed of polyaniline (PANI) and cellulose acetate (CA) are directed to applied in electrical storage devices. The XRD, FTIR, TEM, Ramman and SEM techniques were employed for analyzing the produced films. The TEM show the PANI were formed with the particle size less than 100 nm. Next, argon-ion beam with varying fluencies (4x1014, 8x1014 and 12x1014 ions/cm2) bombard the CA/PANI samples. In frequency of 20 Hz to 5.5 MHz, the dielectric properties of CA/PANI were significantly altered by argon beam treatment. The irradiated sample by 12x1014 ions/cm−2 at frequency 50 Hz resulted in an improvement in the dielectric constant ε′ from 36.4 for the unirradiated CA/PANI to 108.6. Additionally, the relaxation time decreased from 1.63x10−4 sec to 2.08x10−5 sec. The results of this work open the ways for using the irradiated CA/PANI in a number of devices, such as supercapacitors and batteries.","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":"140968325","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}
Photoelectrocatalytic oxidation technology (PEC) is considered to be an efficient process for the treatment of organic wastewater, and its performance depends on the characteristics of the PEC photoanodes. Therefore, the construction of heterogeneous nanostructured photoelectrodes based on suitable semiconductor materials for fast-induced carrier transfer efficiency is essential for the high-performance PEC technique. Herein, the Ti4O7/PbO2 ceramic photoelectrode with efficient PEC performance was synthesized by coupling PbO2 nanospheres with Ti4O7 via a hydrothermal method. To maximize the PEC performance of the ceramic electrodes, the Ti4O7/PbO2 nano-heterostructures were optimized by modulating the hydrothermal temperature. The optimized ceramic electrodes possessed a low Tafel slope, low charge transfer resistance, and good photocurrent response.It exhibited efficient PEC activity (ca. 92.21 %) for the degradation of reactive brilliant blue KN-R. The efficient PEC performance of Ti4O7/PbO2-110 arises from the formation of a type II heterojunction between Ti4O7 and PbO2, which achieves efficient photogenerated carrier separation and facilitates the formation of intermediate active species. This work not only validates the efficient performance of Ti4O7/PbO2-110 for PEC water purification but also provides a reference strategy for the preparation of heterostructured ceramic photoelectrodes with high PEC efficiency.
{"title":"Enhanced photoelectrocatalytic performance of Ti4O7 ceramic electrodes loaded with PbO2 for wastewater degradation","authors":"Xinyu Li, Md Azharul Hossain, Zeqi Jiang, Yinghuan Fu, Hongchao Ma","doi":"10.1680/jsuin.23.00071","DOIUrl":"https://doi.org/10.1680/jsuin.23.00071","url":null,"abstract":"Photoelectrocatalytic oxidation technology (PEC) is considered to be an efficient process for the treatment of organic wastewater, and its performance depends on the characteristics of the PEC photoanodes. Therefore, the construction of heterogeneous nanostructured photoelectrodes based on suitable semiconductor materials for fast-induced carrier transfer efficiency is essential for the high-performance PEC technique. Herein, the Ti<sub>4</sub>O<sub>7</sub>/PbO<sub>2</sub> ceramic photoelectrode with efficient PEC performance was synthesized by coupling PbO<sub>2</sub> nanospheres with Ti<sub>4</sub>O<sub>7</sub> via a hydrothermal method. To maximize the PEC performance of the ceramic electrodes, the Ti<sub>4</sub>O<sub>7</sub>/PbO<sub>2</sub> nano-heterostructures were optimized by modulating the hydrothermal temperature. The optimized ceramic electrodes possessed a low Tafel slope, low charge transfer resistance, and good photocurrent response.It exhibited efficient PEC activity (ca. 92.21 %) for the degradation of reactive brilliant blue KN-R. The efficient PEC performance of Ti<sub>4</sub>O<sub>7</sub>/PbO<sub>2</sub>-110 arises from the formation of a type II heterojunction between Ti<sub>4</sub>O<sub>7</sub> and PbO<sub>2</sub>, which achieves efficient photogenerated carrier separation and facilitates the formation of intermediate active species. This work not only validates the efficient performance of Ti<sub>4</sub>O<sub>7</sub>/PbO<sub>2</sub>-110 for PEC water purification but also provides a reference strategy for the preparation of heterostructured ceramic photoelectrodes with high PEC efficiency.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316653","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}
B. M. Alotaibi, H. Al-Yousef, A. Atta, E. Abdeltwab
This current work using solution-casting preparation method to create flexible polymer composite materials including titanium dioxide (TiO2) and polyvinyl alcohol (PVA). Then, using a wide beam homemade cold cathode ion generator the samples were irradiated by oxygen fluence of 4x1016, 8x1016, and 12x1016 ions.cm−2. Using EDX, contact angle and XRD techniques, the PVA/TiO2 composite film successful production was evaluated. The effects of ion exposure on the optical behavior are reported using UV-Vis technique. The PVA/TiO2 dispersion energy is 1.75 eV, increased to 2.21 eV, 2.66 eV, and 3.12 eV by irradiation of 4x1016, 8x1016, and 12x1016 ions.cm−2. Moreover, the refractive index (n0) of the PVA/TiO2 is 1.18 increased to 1.25, 1.32, and 1.40 respectively. Moreover, the oscillation energy E0 reduced from 4.24 eV for the PVA/TiO2 composite to 3.84 eV, 3.64 eV, and 3.27 eV, respectively. Thus, the changes in the optical and structural alterations in PVA/TiO2 films by ion irradiation, is employ for directed the treated PVA/TiO2 materials in various optoelectronic.
{"title":"Influence of ion beam on the surface characteristics and structural properties of PVA/TiO2 films","authors":"B. M. Alotaibi, H. Al-Yousef, A. Atta, E. Abdeltwab","doi":"10.1680/jsuin.23.00075","DOIUrl":"https://doi.org/10.1680/jsuin.23.00075","url":null,"abstract":"This current work using solution-casting preparation method to create flexible polymer composite materials including titanium dioxide (TiO2) and polyvinyl alcohol (PVA). Then, using a wide beam homemade cold cathode ion generator the samples were irradiated by oxygen fluence of 4x1016, 8x1016, and 12x1016 ions.cm−2. Using EDX, contact angle and XRD techniques, the PVA/TiO2 composite film successful production was evaluated. The effects of ion exposure on the optical behavior are reported using UV-Vis technique. The PVA/TiO2 dispersion energy is 1.75 eV, increased to 2.21 eV, 2.66 eV, and 3.12 eV by irradiation of 4x1016, 8x1016, and 12x1016 ions.cm−2. Moreover, the refractive index (n0) of the PVA/TiO2 is 1.18 increased to 1.25, 1.32, and 1.40 respectively. Moreover, the oscillation energy E0 reduced from 4.24 eV for the PVA/TiO2 composite to 3.84 eV, 3.64 eV, and 3.27 eV, respectively. Thus, the changes in the optical and structural alterations in PVA/TiO2 films by ion irradiation, is employ for directed the treated PVA/TiO2 materials in various optoelectronic.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139612970","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, Binjie Xin, Md All Amin Newton, Lifeng Li, Di Gao
An efficient and practical method is proposed for the separation of oil–water mixtures and emulsions in sustainable water ecosystems, facilitating energy recovery. The construction of flexible ceramic fiber membranes with high throughput and self-cleaning capabilities has proven effective but challenging. This study reports a novel approach combining the sol–gel and electrospinning techniques to synthesize flexible silicon dioxide (SiO2)–titanium dioxide (TiO2) nanofiber membranes (STNFMs). These membranes possess nanoscale rough structures, granting them superhydrophilicity and underwater superoleophobicity (155°). Exploiting the photocatalytic properties of titanium dioxide, STNFMs-4 not only demonstrates excellent separation performance but also exhibits remarkable self-cleaning abilities. After 2 h of ultraviolet light irradiation, the membrane flux returns to its original level. STNFMs provide a promising solution for highly efficient separation of oil–water mixtures and emulsions, with the potential to play a significant role in water treatment and resource recovery.
{"title":"Self-cleaning SiO2–TiO2 ceramic membrane for enhanced oil–water separation","authors":"Yalong Liu, Binjie Xin, Md All Amin Newton, Lifeng Li, Di Gao","doi":"10.1680/jsuin.23.00070","DOIUrl":"https://doi.org/10.1680/jsuin.23.00070","url":null,"abstract":"An efficient and practical method is proposed for the separation of oil–water mixtures and emulsions in sustainable water ecosystems, facilitating energy recovery. The construction of flexible ceramic fiber membranes with high throughput and self-cleaning capabilities has proven effective but challenging. This study reports a novel approach combining the sol–gel and electrospinning techniques to synthesize flexible silicon dioxide (SiO2)–titanium dioxide (TiO2) nanofiber membranes (STNFMs). These membranes possess nanoscale rough structures, granting them superhydrophilicity and underwater superoleophobicity (155°). Exploiting the photocatalytic properties of titanium dioxide, STNFMs-4 not only demonstrates excellent separation performance but also exhibits remarkable self-cleaning abilities. After 2 h of ultraviolet light irradiation, the membrane flux returns to its original level. STNFMs provide a promising solution for highly efficient separation of oil–water mixtures and emulsions, with the potential to play a significant role in water treatment and resource recovery.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139534049","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}
Jiaxuan He, Yan Xu, Xiaoming Tan, Yiming Hu, Jiesheng Liu, Qinyi Liu
This study aims to develop light-cured antimicrobial coatings were developed by dispersing epoxy resin F51-Quaternary Ammonium Salts (F51-QAS) as antimicrobial agents in light-cured emulsions. The molecular structures of these F51-QAS were analyzed using infrared spectroscopy. Thermogravimetric analysis was performed to evaluate the thermal stability of the antimicrobial coatings. Contact angle testing was conducted to investigate the hygroscopic wettability of the coatings. Mechanical properties such as pencil hardness, adhesion strength, flexibility, and impact resistance were evaluated. Antimicrobial rate experiments were conducted to examine the antimicrobial properties of the coatings. The antimicrobial properties were examined through rate experiments against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Results showed that when the F51-QAS content was at 2.7%, the light-cured antimicrobial coatings exhibited excellent overall performance with 100% antimicrobial rate.
{"title":"Study on UV-cured antimicrobial coatings with epoxy resin quaternary ammonium salt","authors":"Jiaxuan He, Yan Xu, Xiaoming Tan, Yiming Hu, Jiesheng Liu, Qinyi Liu","doi":"10.1680/jsuin.23.00072","DOIUrl":"https://doi.org/10.1680/jsuin.23.00072","url":null,"abstract":"This study aims to develop light-cured antimicrobial coatings were developed by dispersing epoxy resin F51-Quaternary Ammonium Salts (F51-QAS) as antimicrobial agents in light-cured emulsions. The molecular structures of these F51-QAS were analyzed using infrared spectroscopy. Thermogravimetric analysis was performed to evaluate the thermal stability of the antimicrobial coatings. Contact angle testing was conducted to investigate the hygroscopic wettability of the coatings. Mechanical properties such as pencil hardness, adhesion strength, flexibility, and impact resistance were evaluated. Antimicrobial rate experiments were conducted to examine the antimicrobial properties of the coatings. The antimicrobial properties were examined through rate experiments against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>). Results showed that when the F51-QAS content was at 2.7%, the light-cured antimicrobial coatings exhibited excellent overall performance with 100% antimicrobial rate.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138493761","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 research work reports the synthesis of copper (II) oxide (CuO) nanoparticles using the wet chemical co-precipitation method. The synthesised nanoparticles were characterised using ultraviolet–visible spectroscopy, X-ray diffraction, field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy and high-resolution transmission electron microscopy in terms of absorption, crystal structure and size, morphology and elemental composition, and particle size. The existence of functional groups was verified by Fourier transform infrared spectroscopy. The synthesised copper (II) oxide nanoparticles showed an absorption peak at 397 nm, and a Tauc’s plot study showed a band-gap energy of 3.2 eV. The effects of varied excitation energies – namely, 3.81 and 3.54 eV – on the emission spectra of rod-shaped nanoparticles were assessed through photoluminescence spectroscopy, and the release of red, orange, green, violet and yellow colours was observed. The voltage–current characteristics of nanoparticle pellets were measured using a two-probe technique. The increase in the direct-current electrical conductivity of pellets heated at 100 and 200°C was ascertained. Overall, this research work provides valuable insights into the electronic properties of copper (II) oxide nanoparticles, which could have potential applications in various fields such as catalysis and electronics.
{"title":"Study of excitation wavelength dependent photoluminescence and electrical conductivity on chemically synthesized metal semiconductor copper oxide nanorods","authors":"Amardeep Bajwa, Harpreet Kaur, Sanjeev Kumar, Gurjinder Singh","doi":"10.1680/jsuin.23.00056","DOIUrl":"https://doi.org/10.1680/jsuin.23.00056","url":null,"abstract":"This research work reports the synthesis of copper (II) oxide (CuO) nanoparticles using the wet chemical co-precipitation method. The synthesised nanoparticles were characterised using ultraviolet–visible spectroscopy, X-ray diffraction, field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy and high-resolution transmission electron microscopy in terms of absorption, crystal structure and size, morphology and elemental composition, and particle size. The existence of functional groups was verified by Fourier transform infrared spectroscopy. The synthesised copper (II) oxide nanoparticles showed an absorption peak at 397 nm, and a Tauc’s plot study showed a band-gap energy of 3.2 eV. The effects of varied excitation energies – namely, 3.81 and 3.54 eV – on the emission spectra of rod-shaped nanoparticles were assessed through photoluminescence spectroscopy, and the release of red, orange, green, violet and yellow colours was observed. The voltage–current characteristics of nanoparticle pellets were measured using a two-probe technique. The increase in the direct-current electrical conductivity of pellets heated at 100 and 200°C was ascertained. Overall, this research work provides valuable insights into the electronic properties of copper (II) oxide nanoparticles, which could have potential applications in various fields such as catalysis and electronics.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135088050","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}
Maryam Jouyandeh, Farzad Seidi, Sajjad Habibzadeh, Mohamed S Hasanin, Paulina Wiśniewska, Navid Rabiee, Henri Vahabi, Seeram Ramakrishna, Mohammad Reza Saeb
Synthetic polymers have to be replaced with green counterparts for sustainability needs. Green and sustainable polymeric coatings have progressively undergone development, as functional and protective materials for myriad applications ranging from packaging to biomedicine. Despite such innovative and environmental privileges, they are not adequately competitive in terms of properties to displace synthetic polymeric coatings. Functionalization of the surface and/or the bulk of the green polymeric coatings by functional groups, natural polymers, nanoparticles, crosslinking agents, anti-fouling precursors, and synthetic polymers can strengthen their properties and enlarge their performance window. However, definitions and terms related to green and sustainable coatings have not been systematically addressed. Biomass-, plant oil-, carbohydrate-, protein- and microbial-based polymeric coatings are the main classes of sustainable polymeric coatings briefly overviewed herein. The technological bottlenecks towards commercialization of sustainable coatings and films are also highlighted.
{"title":"An overview of green and sustainable polymeric coatings","authors":"Maryam Jouyandeh, Farzad Seidi, Sajjad Habibzadeh, Mohamed S Hasanin, Paulina Wiśniewska, Navid Rabiee, Henri Vahabi, Seeram Ramakrishna, Mohammad Reza Saeb","doi":"10.1680/jsuin.23.00043","DOIUrl":"https://doi.org/10.1680/jsuin.23.00043","url":null,"abstract":"Synthetic polymers have to be replaced with green counterparts for sustainability needs. Green and sustainable polymeric coatings have progressively undergone development, as functional and protective materials for myriad applications ranging from packaging to biomedicine. Despite such innovative and environmental privileges, they are not adequately competitive in terms of properties to displace synthetic polymeric coatings. Functionalization of the surface and/or the bulk of the green polymeric coatings by functional groups, natural polymers, nanoparticles, crosslinking agents, anti-fouling precursors, and synthetic polymers can strengthen their properties and enlarge their performance window. However, definitions and terms related to green and sustainable coatings have not been systematically addressed. Biomass-, plant oil-, carbohydrate-, protein- and microbial-based polymeric coatings are the main classes of sustainable polymeric coatings briefly overviewed herein. The technological bottlenecks towards commercialization of sustainable coatings and films are also highlighted.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242938","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}
Yongchao Yuan, Yangyang He, Shouxin Shi, Degang Wu, Guanda Yang
This study investigated the surface modification of copper mesh using modified titanium dioxide (TiO 2 ) coatings to enhance its surface hydrophobic properties while preserving electromagnetic interference (EMI) shielding effectiveness. Silicon-coupling-agent-treated titanium dioxide particles were employed to create micro/nanostructured superhydrophobic coatings. The deposition times were found to influence the coating distribution, pore filling and surface hydrophobicity. S-TiO 2 @Cu mesh with a single layer of modified titanium dioxide coating exhibited the highest water contact angle compared with T-TiO 2 @Cu mesh with triple layer coatings and the original O-TiO 2 @Cu mesh. The superior self-cleaning performance and robust wear resistance of the hydrophobic coatings for S-TiO 2 @Cu mesh were revealed. In addition, both S-TiO 2 @Cu mesh and T-TiO 2 @Cu mesh exhibited satisfactory EMI-shielding efficiency without compromising the intrinsic properties of the copper mesh. These findings provide practical insights into surface modification of copper mesh substrates, emphasizing the balance between surface properties and EMI shielding. The hydrophobic coatings hold promise for multifunctional applications, offering enhanced surface properties without compromising EMI-shielding performance.
{"title":"Fabrication of TiO<sub>2</sub>@Cu mesh with impressive hydrophobic surface for electromagnetic interference shielding","authors":"Yongchao Yuan, Yangyang He, Shouxin Shi, Degang Wu, Guanda Yang","doi":"10.1680/jsuin.23.00067","DOIUrl":"https://doi.org/10.1680/jsuin.23.00067","url":null,"abstract":"This study investigated the surface modification of copper mesh using modified titanium dioxide (TiO 2 ) coatings to enhance its surface hydrophobic properties while preserving electromagnetic interference (EMI) shielding effectiveness. Silicon-coupling-agent-treated titanium dioxide particles were employed to create micro/nanostructured superhydrophobic coatings. The deposition times were found to influence the coating distribution, pore filling and surface hydrophobicity. S-TiO 2 @Cu mesh with a single layer of modified titanium dioxide coating exhibited the highest water contact angle compared with T-TiO 2 @Cu mesh with triple layer coatings and the original O-TiO 2 @Cu mesh. The superior self-cleaning performance and robust wear resistance of the hydrophobic coatings for S-TiO 2 @Cu mesh were revealed. In addition, both S-TiO 2 @Cu mesh and T-TiO 2 @Cu mesh exhibited satisfactory EMI-shielding efficiency without compromising the intrinsic properties of the copper mesh. These findings provide practical insights into surface modification of copper mesh substrates, emphasizing the balance between surface properties and EMI shielding. The hydrophobic coatings hold promise for multifunctional applications, offering enhanced surface properties without compromising EMI-shielding performance.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340578","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}
Different forming directions have significant impact on surface quality in additive manufacturing. This study is aimed at exploring how different forming directions influence surface quality in additive manufacturing. First, experiments were designed to prepare 316L stainless steel by selective laser melting additives manufacturing in different forming directions. Besides, the surfaces of samples manufactured by additives manufacturing in different forming directions were tested using a 3D surface profiler and a scanning electron microscope. In this way, their 3D profile maps, surface roughness values, and scanning electron microscopy images were obtained. Furthermore, the surface quality was characterized by four parameters, the maximum height-S z , the maximum valley depth-S v , the standard deviation of height-S q , and the arithmetic average height-S a . The following results were obtained: (1) Different forming directions correspond to close upper surface roughness S a values, the minimum and maximum values of S a being 7.16 um and 8.20 um, respectively. S a is the smallest among the four parameters (S z , S v , S q , and S a ), shows good stability and statistical significance. (2) In the same forming direction, the upper surface roughness values follow S z >S v >S q >S a ,S z is the largest, exceeding 800 um, average value S a is the smallest reaching 7.36 um. The values of S q , S z , and S v vary when the forming direction changes; specifically, all of them increase when the forming direction changes from a vertical direction to planar and lateral directions in turn. (3) In different forming directions, the values of S z , S v , S q , and S a vary on different surfaces (XOY, YOZ, and XOZ surfaces), but their variations are basically similar. Meanwhile, the S z , S v , S q , and S a values of the free surfaces are at least 10 times greater than those of the printed surface. (4) In the selective laser melting additive manufacturing process, it is necessary to reasonably select a forming direction for parts with different dimensional parameters on each side. High-quality workpiece can be obtained with a reasonable forming direction. The proposed method serves as references for the selection of forming direction of selective laser melting additive manufacturing and provides a new method to improve the surface quality of parts by additive manufacturing.
在增材制造中，不同的成形方向对表面质量有显著影响。本研究旨在探讨增材制造中不同成型方向对表面质量的影响。首先，设计了采用不同成型方向的选择性激光熔化添加剂制备316L不锈钢的实验。此外，利用三维表面轮廓仪和扫描电镜对不同成型方向的添加剂制备样品进行了表面形貌测试。通过这种方法，获得了它们的三维轮廓图、表面粗糙度值和扫描电镜图像。地表质量由最大高度- s z、最大谷深- s v、高度标准差- s q和算术平均高度- s a 4个参数表征。结果表明:(1)不同的成形方向对应的上表面粗糙度S a值较为接近，S a最小值为7.16 um，最大值为8.20 um;S a在S z、S v、S q、S a四个参数中最小，具有较好的稳定性和统计学意义。(2)同一成形方向上表面粗糙度值依次为S z >S v >S q >S a,S z最大，超过800 um，平均值S a最小，达到7.36 um。S q、S z、S v随成形方向的变化而变化;其中，当成形方向由垂直方向依次向平面方向和横向方向转变时，它们都有所增加。(3)在不同成形方向下，不同表面(XOY、YOZ、XOZ)上的S z、S v、S q、S a值不同，但变化基本相似。同时，自由表面的sz、sv、sq和sa值至少是印刷表面的10倍。(4)在选择性激光熔化增材制造工艺中，需要对每侧尺寸参数不同的零件合理选择成型方向。合理的成形方向可以得到高质量的工件。该方法为选择性激光熔化增材制造成形方向的选择提供了参考，为增材制造提高零件表面质量提供了一种新方法。
{"title":"Influence of forming directions on surface quality of 316L stainless steel produced by selective laser melting additive manufacturing","authors":"Qiang Li, Songyong Liu, Qingyang Wang, Yan Wang","doi":"10.1680/jsuin.23.00059","DOIUrl":"https://doi.org/10.1680/jsuin.23.00059","url":null,"abstract":"Different forming directions have significant impact on surface quality in additive manufacturing. This study is aimed at exploring how different forming directions influence surface quality in additive manufacturing. First, experiments were designed to prepare 316L stainless steel by selective laser melting additives manufacturing in different forming directions. Besides, the surfaces of samples manufactured by additives manufacturing in different forming directions were tested using a 3D surface profiler and a scanning electron microscope. In this way, their 3D profile maps, surface roughness values, and scanning electron microscopy images were obtained. Furthermore, the surface quality was characterized by four parameters, the maximum height-S z , the maximum valley depth-S v , the standard deviation of height-S q , and the arithmetic average height-S a . The following results were obtained: (1) Different forming directions correspond to close upper surface roughness S a values, the minimum and maximum values of S a being 7.16 um and 8.20 um, respectively. S a is the smallest among the four parameters (S z , S v , S q , and S a ), shows good stability and statistical significance. (2) In the same forming direction, the upper surface roughness values follow S z >S v >S q >S a ,S z is the largest, exceeding 800 um, average value S a is the smallest reaching 7.36 um. The values of S q , S z , and S v vary when the forming direction changes; specifically, all of them increase when the forming direction changes from a vertical direction to planar and lateral directions in turn. (3) In different forming directions, the values of S z , S v , S q , and S a vary on different surfaces (XOY, YOZ, and XOZ surfaces), but their variations are basically similar. Meanwhile, the S z , S v , S q , and S a values of the free surfaces are at least 10 times greater than those of the printed surface. (4) In the selective laser melting additive manufacturing process, it is necessary to reasonably select a forming direction for parts with different dimensional parameters on each side. High-quality workpiece can be obtained with a reasonable forming direction. The proposed method serves as references for the selection of forming direction of selective laser melting additive manufacturing and provides a new method to improve the surface quality of parts by additive manufacturing.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135813211","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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