A. Ruda, Marjune Tamayo Bonilla, Kurt Sterling M. Ubas, Amierson C. Tilendo, D. J. E. Estrada, R. Capangpangan, R. M. T. Cumba, J. Labis, N. L. Sayson, Arnold A. Alguno
Mild steels were the most frequently used materials in industries and factories since it possesses unique properties but due to weak environmental changes, these cause deterioration and corrosion to the materials’ surface. To prevent such, protective coatings were applied to protect against corrosion in which by incorporating titanium nanoparticles in polyurethane coatings. Titanium nanoparticles were synthesized using titanium butoxide as a precursor. The obtained nanoparticles were used as an inhibitor mixed with coconut oil-based polyurethane polyol blend against the corrosion on mild steel of 3.5% of sodium chloride solution which has been investigated using the Tafel polarization technique. The polarization curves of the corrosion potential for bare mild steel, along with different amounts of titanium nanoparticles coating, exhibit a positive shift. This shift indicates that the coating film effectively reduces the transport path for the corrosive solution, providing a protective barrier against corrosion. This observation is further supported by the results of the adhesive strength test, which demonstrates that the attachment of the coating films to the metal increases with higher amounts of titanium nanoparticles. This indicates improved adhesion and a stronger bond between the coating and the substrate, enhancing the overall corrosion resistance. The increase of contact angle test confirms the improvement of the coating’s hydrophobicity with the addition of titanium nanoparticles. This suggests that the coating repels water more effectively, further contributing to its protective properties against corrosion. Results also show that the addition of 4wt% of titanium nanoparticles has better anti-corrosion properties than the PU CCP alone, and 0.5, 1.0, and 2.0wt% of titanium added.
{"title":"TiO2- Polyurethane Cocopol Blend Nanocomposites as an Anticorrosion Coating for Mild Steel","authors":"A. Ruda, Marjune Tamayo Bonilla, Kurt Sterling M. Ubas, Amierson C. Tilendo, D. J. E. Estrada, R. Capangpangan, R. M. T. Cumba, J. Labis, N. L. Sayson, Arnold A. Alguno","doi":"10.4028/p-57v3st","DOIUrl":"https://doi.org/10.4028/p-57v3st","url":null,"abstract":"Mild steels were the most frequently used materials in industries and factories since it possesses unique properties but due to weak environmental changes, these cause deterioration and corrosion to the materials’ surface. To prevent such, protective coatings were applied to protect against corrosion in which by incorporating titanium nanoparticles in polyurethane coatings. Titanium nanoparticles were synthesized using titanium butoxide as a precursor. The obtained nanoparticles were used as an inhibitor mixed with coconut oil-based polyurethane polyol blend against the corrosion on mild steel of 3.5% of sodium chloride solution which has been investigated using the Tafel polarization technique. The polarization curves of the corrosion potential for bare mild steel, along with different amounts of titanium nanoparticles coating, exhibit a positive shift. This shift indicates that the coating film effectively reduces the transport path for the corrosive solution, providing a protective barrier against corrosion. This observation is further supported by the results of the adhesive strength test, which demonstrates that the attachment of the coating films to the metal increases with higher amounts of titanium nanoparticles. This indicates improved adhesion and a stronger bond between the coating and the substrate, enhancing the overall corrosion resistance. The increase of contact angle test confirms the improvement of the coating’s hydrophobicity with the addition of titanium nanoparticles. This suggests that the coating repels water more effectively, further contributing to its protective properties against corrosion. Results also show that the addition of 4wt% of titanium nanoparticles has better anti-corrosion properties than the PU CCP alone, and 0.5, 1.0, and 2.0wt% of titanium added.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"23 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The results of thermostamping simulation of a composite stringer demonstrator made from a high temperature plastic (PAEK) reinforced with 5-Harness Satin (5HS) weave carbon fiber fabric are presented in this paper. The effects of four different gripping configurations (A, B, C and D) and four different laminate layups ([0f]4 cross-ply, [45f]4 angle-ply, [0f/45f]s and [45f/0f]s quasi-isotropic layups) on the quality of the formed part are computationally investigated using AniForm™ software. The gripping configuration A consists of 22 pieces of extension spring with stiffness of 0.17 N/mm and pretension of 5.50 N. The configuration B consists of 8 pieces of extension spring with stiffness of 0.51 N/mm and pretension of 16.25 N. The configuration C uses the same type of spring as used in the configuration B, only its quantity is more (12 pieces). The configuration D is similar to the configuration C but they are different in the spring arrangement. Our simulation results show that regardless of the gripping configuration the quasi-isotropic layups demonstrate the lowest laminate sag while the angle-ply layup demonstrates the highest shear angle and thickness. For the slip-path length, it strongly depends on the layup and gripping configuration. As conclusion, the optimal choices for the thermoformed composite stringer demonstrator are cross-ply layup with configuration C, angle-ply layup and [45f/0f]s quasi-isotropic layup with configuration D, and [0f/45f]s quasi-isotropic layup with configuration B.
本文介绍了由高温塑料（PAEK）和 5-Harness Satin（5HS）编织碳纤维织物增强的复合材料支撑杆演示器的热压成型模拟结果。使用 AniForm™ 软件计算研究了四种不同的夹持配置（A、B、C 和 D）和四种不同的层压板铺层（[0f]4 交叉层、[45f]4 角层、[0f/45f]s 和 [45f/0f]s 准各向同性铺层）对成型部件质量的影响。夹持配置 A 由 22 片拉伸弹簧组成，刚度为 0.17 N/mm，预拉力为 5.50 N；配置 B 由 8 片拉伸弹簧组成，刚度为 0.51 N/mm，预拉力为 16.25 N。配置 D 与配置 C 相似，但在弹簧布置上有所不同。我们的模拟结果表明，无论采用哪种夹持结构，准各向同性层叠结构的层压板下垂度最小，而角层层叠结构的剪切角和厚度最大。至于滑移路径长度，则在很大程度上取决于层叠和夹持结构。综上所述，热成型复合材料支柱演示器的最佳选择是配置 C 的交叉层叠、配置 D 的角层叠和[45f/0f]s 准各向同性层叠，以及配置 B 的[0f/45f]s 准各向同性层叠。
{"title":"Thermostamping Simulation of a Carbon Fiber-Reinforced PAEK Composite Stringer","authors":"Andi Haris, Yi Wen Cheah, Wern Sze Teo","doi":"10.4028/p-l1slzo","DOIUrl":"https://doi.org/10.4028/p-l1slzo","url":null,"abstract":"The results of thermostamping simulation of a composite stringer demonstrator made from a high temperature plastic (PAEK) reinforced with 5-Harness Satin (5HS) weave carbon fiber fabric are presented in this paper. The effects of four different gripping configurations (A, B, C and D) and four different laminate layups ([0f]4 cross-ply, [45f]4 angle-ply, [0f/45f]s and [45f/0f]s quasi-isotropic layups) on the quality of the formed part are computationally investigated using AniForm™ software. The gripping configuration A consists of 22 pieces of extension spring with stiffness of 0.17 N/mm and pretension of 5.50 N. The configuration B consists of 8 pieces of extension spring with stiffness of 0.51 N/mm and pretension of 16.25 N. The configuration C uses the same type of spring as used in the configuration B, only its quantity is more (12 pieces). The configuration D is similar to the configuration C but they are different in the spring arrangement. Our simulation results show that regardless of the gripping configuration the quasi-isotropic layups demonstrate the lowest laminate sag while the angle-ply layup demonstrates the highest shear angle and thickness. For the slip-path length, it strongly depends on the layup and gripping configuration. As conclusion, the optimal choices for the thermoformed composite stringer demonstrator are cross-ply layup with configuration C, angle-ply layup and [45f/0f]s quasi-isotropic layup with configuration D, and [0f/45f]s quasi-isotropic layup with configuration B.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"45 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lightweight metallic alloys in the transport sector are the essential choice to reduce carbon monoxide emissions. Magnesium (Mg) can serve this purpose appreciably because it has a low density compared to other metallic metals and a high strength in a small portion of metals. The reason behind this is having very low weight. Notwithstanding the alloys exhibit high susceptibility to corrosion especially galvanic corrosion, which impedes it from its various applications. The corrosion resistance of magnesium alloy depends largely on the surface film whether it can protect well and the corrosion due to galvanic effect between the second phase particles or microstructures and the magnesium matrix. Role of second phase particles eventually improves the corrosion property by enhancing its resistance to corrosion. Mg-4Zn being a promising alloy, 3 wt% Gd has been added further to investigate the corrosion resistant properties of Mg-4Zn-3Gd alloy. After preparing the alloys by casting method in induction furnace followed by homogenization at 410°C, the sample was hot rolled at 400°C. Preparation of the samples has been verified by EDS, XRF and XRD analysis. Corrosion study has been done for 1 hour, 24 hours and 72 hours. Microstructures have been taken for as cast, homogenized, and as rolled condition before corrosion test. The analysis shows a large difference in the grain size and phase distribution. Due to dynamic recrystallization during rolling hardness also shows differences compared to as cast and homogenized sample. The corrosion test is performed by weight loss test, electrochemical measurement, and immersion test. In the results, it has been seen an increase in corrosion rate at the initial stage, however it came to a constant rate after some time. After corrosion test, optical micrographs (OM) and scanning electron microstructures (SEM) images show typical morphology of corroded surface with some micro cracks. The presence of Gd in Mg-4Zn alloy enhanced the corrosion performance when it is done for longer time.
{"title":"Effect of Gadolinium Content on the Microstructures and Corrosion Properties of Mg-4Zn-3Gd Alloy","authors":"Mita Khanam, Chanchal Kumar Roy, H. Al Rashed","doi":"10.4028/p-ehg8mk","DOIUrl":"https://doi.org/10.4028/p-ehg8mk","url":null,"abstract":"Lightweight metallic alloys in the transport sector are the essential choice to reduce carbon monoxide emissions. Magnesium (Mg) can serve this purpose appreciably because it has a low density compared to other metallic metals and a high strength in a small portion of metals. The reason behind this is having very low weight. Notwithstanding the alloys exhibit high susceptibility to corrosion especially galvanic corrosion, which impedes it from its various applications. The corrosion resistance of magnesium alloy depends largely on the surface film whether it can protect well and the corrosion due to galvanic effect between the second phase particles or microstructures and the magnesium matrix. Role of second phase particles eventually improves the corrosion property by enhancing its resistance to corrosion. Mg-4Zn being a promising alloy, 3 wt% Gd has been added further to investigate the corrosion resistant properties of Mg-4Zn-3Gd alloy. After preparing the alloys by casting method in induction furnace followed by homogenization at 410°C, the sample was hot rolled at 400°C. Preparation of the samples has been verified by EDS, XRF and XRD analysis. Corrosion study has been done for 1 hour, 24 hours and 72 hours. Microstructures have been taken for as cast, homogenized, and as rolled condition before corrosion test. The analysis shows a large difference in the grain size and phase distribution. Due to dynamic recrystallization during rolling hardness also shows differences compared to as cast and homogenized sample. The corrosion test is performed by weight loss test, electrochemical measurement, and immersion test. In the results, it has been seen an increase in corrosion rate at the initial stage, however it came to a constant rate after some time. After corrosion test, optical micrographs (OM) and scanning electron microstructures (SEM) images show typical morphology of corroded surface with some micro cracks. The presence of Gd in Mg-4Zn alloy enhanced the corrosion performance when it is done for longer time.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"30 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141360077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, the molecular dynamics simulation method is employed to understand the sintering behaviour and mechanical properties of the Invar alloy. The densification behaviour of Invar alloy nanoparticles with different sizes at a fixed sintering temperature is investigated. The influence of external pressure is also simulated. Finally, the uniaxial tensile test is employed to study the mechanical response of the sintered product. The results show a qualitative relationship between particle size, external pressure, densification, and mechanical properties. Smaller particle sizes and higher external pressure promote densification. The uniaxial tensile results show that the sintered structure has a lower Young’s modulus than the bulk crystal because of the porosity, and the sample with high porosity has a low value of mechanical strength.
{"title":"Exploring Sintering, Densification, and Mechanical Behaviour of Invar Alloys through Molecular Dynamics Simulations","authors":"Sandeep Kumar Sahni, Somnath Bhowmick, Anish Upadhyaya","doi":"10.4028/p-3otzjc","DOIUrl":"https://doi.org/10.4028/p-3otzjc","url":null,"abstract":"In this work, the molecular dynamics simulation method is employed to understand the sintering behaviour and mechanical properties of the Invar alloy. The densification behaviour of Invar alloy nanoparticles with different sizes at a fixed sintering temperature is investigated. The influence of external pressure is also simulated. Finally, the uniaxial tensile test is employed to study the mechanical response of the sintered product. The results show a qualitative relationship between particle size, external pressure, densification, and mechanical properties. Smaller particle sizes and higher external pressure promote densification. The uniaxial tensile results show that the sintered structure has a lower Young’s modulus than the bulk crystal because of the porosity, and the sample with high porosity has a low value of mechanical strength.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"54 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141360242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alloys of Magnesium metal have attracted the attention of the automobile industries in the past two decades due to their greater specific strength as well as stiffness. However, increasing the corrosion performance of alloys of magnesium has remained a prime concern in order to attain better performance without using expensive rare-earth elements. In this study, the result of Sn addition (0%, 2%, 4%) to hot rolled binary Mg-2Zn alloy was examined in terms of their corrosion and microstructural properties. To understand microstructural features, optical micrography, and SEM-EDX study were conducted. SEM and EDX analysis confirmed the presence of Sn phase after 2% and 4% addition of Sn. The number of particles increased with the gradual increase in the addition of Sn. However, Sn lowered the melting point of Zn precipitates. Thus, the presence of Zn particles was reduced with the addition of Sn. Electrochemical analyses were conducted in order to study the corrosion performance of the selected alloys by submerging it in NaCl (3.5 wt.%) solution, supported by the SEM micrographs of the corroded surface. It was found that adding tin up to 2% increases corrosion resistance. The addition of 4% Sn, on the other hand, introduced large-size particles of Mg2Sn, leading to local corrosion initiation sites, micro galvanic in nature, and hence, reducing corrosion resistance.
{"title":"Effects of Sn on Corrosion Resistance of Rare-Earth-Free Mg-2Zn Alloy","authors":"Aniqa Tasnim, Chanchal Kumar Roy, H. Al Rashed","doi":"10.4028/p-vhh0nq","DOIUrl":"https://doi.org/10.4028/p-vhh0nq","url":null,"abstract":"Alloys of Magnesium metal have attracted the attention of the automobile industries in the past two decades due to their greater specific strength as well as stiffness. However, increasing the corrosion performance of alloys of magnesium has remained a prime concern in order to attain better performance without using expensive rare-earth elements. In this study, the result of Sn addition (0%, 2%, 4%) to hot rolled binary Mg-2Zn alloy was examined in terms of their corrosion and microstructural properties. To understand microstructural features, optical micrography, and SEM-EDX study were conducted. SEM and EDX analysis confirmed the presence of Sn phase after 2% and 4% addition of Sn. The number of particles increased with the gradual increase in the addition of Sn. However, Sn lowered the melting point of Zn precipitates. Thus, the presence of Zn particles was reduced with the addition of Sn. Electrochemical analyses were conducted in order to study the corrosion performance of the selected alloys by submerging it in NaCl (3.5 wt.%) solution, supported by the SEM micrographs of the corroded surface. It was found that adding tin up to 2% increases corrosion resistance. The addition of 4% Sn, on the other hand, introduced large-size particles of Mg2Sn, leading to local corrosion initiation sites, micro galvanic in nature, and hence, reducing corrosion resistance.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"26 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Subuki, N. Ramlee, Ahmad Rafizan Mohamad Daud, Muhammad Hussain Ismail, Norazlen Rasid
Addition of high percentage of palm stearin (PS) into a blend with high density polyethylene (HDPE) may result in the blend instability and poor flowability of the composite during injection moulding process. The undesirable effect of the PS addition arises from lack of interaction between the PS and HDPE matrix. To improve the interaction between the two components, a compatibilizer was added to the blend. The objective of this work is to study the effect of glycerol monostearate (GMS) compatibilizer concentration (1-5 wt%) on the HDPE-PS composite with PS content of 40 wt.%. The thermal properties of the HDPE-PS composite were characterized using torque analysis, differential scanning calorimetry (DSC) analysis and rheology analysis. It was found that melting temperature of the HDPE-PS composite decreases with GMS concentration. The presence of GMS in the HDPE-PS composite had improved composite flowability indicate suitability of the GMS as compatibilizer for the HDPE-PS composite.
{"title":"Rheological and Thermal Characterization of Glycerol Monostearate (GMS) as Compatibilizer on Polyethylene-Palm Stearin Composite","authors":"I. Subuki, N. Ramlee, Ahmad Rafizan Mohamad Daud, Muhammad Hussain Ismail, Norazlen Rasid","doi":"10.4028/p-bzsr4o","DOIUrl":"https://doi.org/10.4028/p-bzsr4o","url":null,"abstract":"Addition of high percentage of palm stearin (PS) into a blend with high density polyethylene (HDPE) may result in the blend instability and poor flowability of the composite during injection moulding process. The undesirable effect of the PS addition arises from lack of interaction between the PS and HDPE matrix. To improve the interaction between the two components, a compatibilizer was added to the blend. The objective of this work is to study the effect of glycerol monostearate (GMS) compatibilizer concentration (1-5 wt%) on the HDPE-PS composite with PS content of 40 wt.%. The thermal properties of the HDPE-PS composite were characterized using torque analysis, differential scanning calorimetry (DSC) analysis and rheology analysis. It was found that melting temperature of the HDPE-PS composite decreases with GMS concentration. The presence of GMS in the HDPE-PS composite had improved composite flowability indicate suitability of the GMS as compatibilizer for the HDPE-PS composite.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"289 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140233317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nickel-Phosphorous/diamond coatings were electrodeposited onto steel substrates using a pulse-stirring method. The electrodeposition process involved a solution containing nickel sulphate, phosphorus acid, and diamond particles, resulting in the co-electrodeposition of 4-8 µm of diamond particles into a Ni-P matrix. To investigate the effects of electrodeposition current density on the properties of the Ni-P/diamond composite coating, scanning electron microscopy (SEM), hardness testing, and electrochemical testing were employed. The research findings revealed that higher current density (0.03 A/cm2) led to a denser diamond particle coating with diamond contents of up to 32.70 vol%. Additionally, the Ni-P/diamond coatings achieved a maximum hardness of 2819 ± 12.55 HV0.1 when fabricated using the current density of 0.03 A/cm2. The "pulse-stirring fabrication" method yields a coating with significantly enhanced wear resistance due to incorporating densely packed diamond particles. The intermittent pulses during the fabrication process are crucial for achieving the desired dispersion and adhesion of the diamond particles, leading to a practical and durable wear-resistant coating.
{"title":"Effect of Current Density on Hardness of Ni-P/Diamond Composite Coatings Fabricated by Electrodeposition","authors":"Nujira Kothanam, Chatpawee Hom-on, Jirapan Srimaneerat, Panya Wintachai, Premchai Moolla, Komsak Harachai, P. Jaroenapibal","doi":"10.4028/p-bdztq9","DOIUrl":"https://doi.org/10.4028/p-bdztq9","url":null,"abstract":"Nickel-Phosphorous/diamond coatings were electrodeposited onto steel substrates using a pulse-stirring method. The electrodeposition process involved a solution containing nickel sulphate, phosphorus acid, and diamond particles, resulting in the co-electrodeposition of 4-8 µm of diamond particles into a Ni-P matrix. To investigate the effects of electrodeposition current density on the properties of the Ni-P/diamond composite coating, scanning electron microscopy (SEM), hardness testing, and electrochemical testing were employed. The research findings revealed that higher current density (0.03 A/cm2) led to a denser diamond particle coating with diamond contents of up to 32.70 vol%. Additionally, the Ni-P/diamond coatings achieved a maximum hardness of 2819 ± 12.55 HV0.1 when fabricated using the current density of 0.03 A/cm2. The \"pulse-stirring fabrication\" method yields a coating with significantly enhanced wear resistance due to incorporating densely packed diamond particles. The intermittent pulses during the fabrication process are crucial for achieving the desired dispersion and adhesion of the diamond particles, leading to a practical and durable wear-resistant coating.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"20 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140234389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phimaphon Kaeokanphai, S. Tanpichai, A. Boonmahitthisud
Chitin is the second most abundant biopolymer in the world. Herein, deacetylated chitin nanofibers (dChNFs) through partial deacetylation were initially prepared, and dChNFs were subsequently added into chitosan (CS) to develop the biodegradable coatings to extend the shelf life of bananas. The degree of deacetylation and the average diameter of the obtained dChNFs were 29.12 % and 19.49 ± 3.1 nm, respectively. The addition of dChNFs into CS at the ratio of 50:50 decreased the water vapor permeability (WVP) from 4.56 × 10–11 g/m·s·Pa to 3.81 × 10–11 g/m·s·Pa. Moreover, three different suspensions of CS, dChNFs, and CS/dChNFs were applied as coatings on Hom–Thong bananas via the dipping technique. The application of the CS/dChNFs coating showed a significant postponement in the color change of the peel (from green to yellow) to 22 days, compared to 9 days for uncoated bananas. The weight of the bananas coated with CS/dChNFs exhibited a weight loss of 26.53 % day–1, which was lower than that of the uncoated bananas (30.71 % day–1). This suggested that the CS/dChNFs coating would be efficiently used to prolong the shelf life of bananas, reducing food waste.
{"title":"Chitosan-Based Coating Incorporated with Chitin Nanofibers for Extension of the Shelf Life of Fruits","authors":"Phimaphon Kaeokanphai, S. Tanpichai, A. Boonmahitthisud","doi":"10.4028/p-90xwyy","DOIUrl":"https://doi.org/10.4028/p-90xwyy","url":null,"abstract":"Chitin is the second most abundant biopolymer in the world. Herein, deacetylated chitin nanofibers (dChNFs) through partial deacetylation were initially prepared, and dChNFs were subsequently added into chitosan (CS) to develop the biodegradable coatings to extend the shelf life of bananas. The degree of deacetylation and the average diameter of the obtained dChNFs were 29.12 % and 19.49 ± 3.1 nm, respectively. The addition of dChNFs into CS at the ratio of 50:50 decreased the water vapor permeability (WVP) from 4.56 × 10–11 g/m·s·Pa to 3.81 × 10–11 g/m·s·Pa. Moreover, three different suspensions of CS, dChNFs, and CS/dChNFs were applied as coatings on Hom–Thong bananas via the dipping technique. The application of the CS/dChNFs coating showed a significant postponement in the color change of the peel (from green to yellow) to 22 days, compared to 9 days for uncoated bananas. The weight of the bananas coated with CS/dChNFs exhibited a weight loss of 26.53 % day–1, which was lower than that of the uncoated bananas (30.71 % day–1). This suggested that the CS/dChNFs coating would be efficiently used to prolong the shelf life of bananas, reducing food waste.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"331 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140232815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Panya Wintachai, Nujira Kothanam, Komsak Harachai, N. Triroj, P. Jaroenapibal
Ni-P coatings were prepared on low carbon steel substrates using the pulse electrodeposition method. The influence of the pulse duty cycle on the phosphorus content and hardness of the Ni-P coatings was investigated. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were employed to examine the surface morphology and chemical composition of the Ni-P coating layers. The results showed that an increased pulse duty cycle (20% - 80%) led to a decreased phosphorus content from 17.81 wt.% to 13.71 wt.%. The microhardness values were found to have an inverse relationship with the phosphorus content. The highest hardness of 538.22 ± 12.92 HV0.1 was obtained from the sample produced with a duty cycle of 80%, which had the lowest P content of 13.71 wt.%.
{"title":"Influence of Duty Cycle on the Phosphorus Content and Hardness of the Ni-P Coatings Produced by Pulse-Current Electroplating","authors":"Panya Wintachai, Nujira Kothanam, Komsak Harachai, N. Triroj, P. Jaroenapibal","doi":"10.4028/p-i5aoln","DOIUrl":"https://doi.org/10.4028/p-i5aoln","url":null,"abstract":"Ni-P coatings were prepared on low carbon steel substrates using the pulse electrodeposition method. The influence of the pulse duty cycle on the phosphorus content and hardness of the Ni-P coatings was investigated. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were employed to examine the surface morphology and chemical composition of the Ni-P coating layers. The results showed that an increased pulse duty cycle (20% - 80%) led to a decreased phosphorus content from 17.81 wt.% to 13.71 wt.%. The microhardness values were found to have an inverse relationship with the phosphorus content. The highest hardness of 538.22 ± 12.92 HV0.1 was obtained from the sample produced with a duty cycle of 80%, which had the lowest P content of 13.71 wt.%.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"33 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140232692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chaiyawat Na Lampang, Pongsert Sriprom, Kanjana Manamoongmongkol, P. Assawasaengrat, Woatthichai Narkrugsa, Lamphung Phumjan
In this study, Chitosan-Xyloglucan encapsulated Titanium dioxide was prepared by in-situ method for coating Silk fabric. FT-IR XRD characterized the functional groups and formation of crystallization of composite film. SEM analysis showed the immobilization of composite film on the surface of silk fabric. The coated silk fabrics were stained with methylene blue, and the stain removal efficiency was evaluated. The results showed that the composite film was deposited onto the silk fabric. The functional groups showed peaks around 1635 to 1636 and 400 to 500 cm-1 that indicate the presence of C=N groups of Chitosan-Xyloglucan and Ti-O groups of TiO2 on the composite, respectively. The XRD results indicated that the TiO2 prepared by the sol-gel method was an anatase crystalline structure. The mechanical properties showed the composite film was superior to the Chitosan-Xyloglucan, TiO2, and uncoated silk fabric. Finally, the methylene blue degradation capability was investigated. The coated silk fabric has insignificantly removing methylene blue stain than the untreated silk fabric, but it is noticeably repellent to stain.
{"title":"Characterization and Self-Cleaning Properties of Silk Fabric Coated by Chitosan-Xyloglucan/nano-TiO2 Composite Film","authors":"Chaiyawat Na Lampang, Pongsert Sriprom, Kanjana Manamoongmongkol, P. Assawasaengrat, Woatthichai Narkrugsa, Lamphung Phumjan","doi":"10.4028/p-kghd7e","DOIUrl":"https://doi.org/10.4028/p-kghd7e","url":null,"abstract":"In this study, Chitosan-Xyloglucan encapsulated Titanium dioxide was prepared by in-situ method for coating Silk fabric. FT-IR XRD characterized the functional groups and formation of crystallization of composite film. SEM analysis showed the immobilization of composite film on the surface of silk fabric. The coated silk fabrics were stained with methylene blue, and the stain removal efficiency was evaluated. The results showed that the composite film was deposited onto the silk fabric. The functional groups showed peaks around 1635 to 1636 and 400 to 500 cm-1 that indicate the presence of C=N groups of Chitosan-Xyloglucan and Ti-O groups of TiO2 on the composite, respectively. The XRD results indicated that the TiO2 prepared by the sol-gel method was an anatase crystalline structure. The mechanical properties showed the composite film was superior to the Chitosan-Xyloglucan, TiO2, and uncoated silk fabric. Finally, the methylene blue degradation capability was investigated. The coated silk fabric has insignificantly removing methylene blue stain than the untreated silk fabric, but it is noticeably repellent to stain.","PeriodicalId":21754,"journal":{"name":"Solid State Phenomena","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140234673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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：