Pub Date : 2024-12-14DOI: 10.1007/s13367-024-00115-z
Atsushi Matsumoto
Poly(ionic liquid)s are ion-containing polymers possessing ionic liquid structures on their repeating units. Owing to the unique physicochemical properties of ionic liquids, many existing studies have found that the properties of poly(ionic liquid)s are distinct from those of conventional ion-containing polymers, such as poly(sodium styrene sulfonate). A lot of scientific efforts have been made to understand the relationship between the chemical structure and the material properties of poly(ionic liquid)s, and several good review papers are available in the literature. The aim of this short review is to summarize key results on the viscoelastic properties of poly(ionic liquid)s in solution. We discuss in detail the counterion condensation and the charge screening in poly(ionic liquid) solutions.
{"title":"Solution rheology of poly(ionic liquid)s: current understanding and open questions","authors":"Atsushi Matsumoto","doi":"10.1007/s13367-024-00115-z","DOIUrl":"10.1007/s13367-024-00115-z","url":null,"abstract":"<div><p>Poly(ionic liquid)s are ion-containing polymers possessing ionic liquid structures on their repeating units. Owing to the unique physicochemical properties of ionic liquids, many existing studies have found that the properties of poly(ionic liquid)s are distinct from those of conventional ion-containing polymers, such as poly(sodium styrene sulfonate). A lot of scientific efforts have been made to understand the relationship between the chemical structure and the material properties of poly(ionic liquid)s, and several good review papers are available in the literature. The aim of this short review is to summarize key results on the viscoelastic properties of poly(ionic liquid)s in solution. We discuss in detail the counterion condensation and the charge screening in poly(ionic liquid) solutions.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"319 - 328"},"PeriodicalIF":2.2,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13367-024-00115-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-24DOI: 10.1007/s13367-024-00112-2
Takeshi Sato, Kenji Yoshimoto
This review summarized the multiscale simulation (MSS) methods for polymeric liquids. Since polymeric liquids have multiscale characteristics of monomeric, mesoscopic, and macroscopic flow scales, MSSs that relate different hierarchical levels are adequate to reproduce flow properties accurately. Our review includes pioneering studies to the most advanced MSS studies on rheology predictions and flow simulations of polymeric liquids. We discuss two major types of MSS methods: the bottom-up and model-embedded MSS methods. The former method mainly connects all-atom molecular dynamics models and mesoscopic models to predict rheological properties. In contrast, the latter method, where a microscopic or mesoscopic model is embedded in a macroscopic computational domain, is designed to predict macroscopic flow properties. Finally, we also discuss MSS methods using machine learning techniques.
{"title":"Recent developments on multiscale simulations for rheology and complex flow of polymers","authors":"Takeshi Sato, Kenji Yoshimoto","doi":"10.1007/s13367-024-00112-2","DOIUrl":"10.1007/s13367-024-00112-2","url":null,"abstract":"<div><p>This review summarized the multiscale simulation (MSS) methods for polymeric liquids. Since polymeric liquids have multiscale characteristics of monomeric, mesoscopic, and macroscopic flow scales, MSSs that relate different hierarchical levels are adequate to reproduce flow properties accurately. Our review includes pioneering studies to the most advanced MSS studies on rheology predictions and flow simulations of polymeric liquids. We discuss two major types of MSS methods: the bottom-up and model-embedded MSS methods. The former method mainly connects all-atom molecular dynamics models and mesoscopic models to predict rheological properties. In contrast, the latter method, where a microscopic or mesoscopic model is embedded in a macroscopic computational domain, is designed to predict macroscopic flow properties. Finally, we also discuss MSS methods using machine learning techniques.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"253 - 269"},"PeriodicalIF":2.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13367-024-00112-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-21DOI: 10.1007/s13367-024-00111-3
Reza Salehiyan, Sanaz Soleymani Eil Bakhtiari
This review provides an in-depth analysis of the thermal degradation of biodegradable polymers through rheological methods. Focusing on key techniques such as time sweep tests, frequency sweep tests, and nonlinear rheological analyses gained at higher shear tests, the review highlights how these approaches offer critical insights into polymer stability and degradation kinetics. It entails an understanding of how molecular weight reduction, a common degradation mechanism, significantly impacts the performance of biodegradable polymers, and how the use of appropriate fillers can enhance thermal stability by mitigating chain scission. The review also discusses the application of the Arrhenius equation in modelling thermal degradation, helping predict degradation rates and optimize processing conditions. Time sweep tests are particularly emphasized for their ability to monitor polymer stability under various environmental conditions, while frequency sweep tests provide insights into the effects of processing/thermal history on material degradation. Tests at higher shear rates, which simulate real-world processing conditions such as extrusion and injection moulding, are explored for their role in understanding how processing-induced shear forces accelerate polymer degradation. Various biodegradable polymers are considered in this review, with polylactic acid (PLA) being the dominant polymer studied across most research, providing a clear picture of its degradation behaviour and strategies for enhancing its thermal stability. Therefore, it is expected that this review will be a comprehensive guide for researchers and engineers looking to optimize the thermal stability and performance of biodegradable polymers in various industrial applications.
{"title":"A review on rheological approaches as a perfect tool to monitor thermal degradation of biodegradable polymers","authors":"Reza Salehiyan, Sanaz Soleymani Eil Bakhtiari","doi":"10.1007/s13367-024-00111-3","DOIUrl":"10.1007/s13367-024-00111-3","url":null,"abstract":"<div><p>This review provides an in-depth analysis of the thermal degradation of biodegradable polymers through rheological methods. Focusing on key techniques such as time sweep tests, frequency sweep tests, and nonlinear rheological analyses gained at higher shear tests, the review highlights how these approaches offer critical insights into polymer stability and degradation kinetics. It entails an understanding of how molecular weight reduction, a common degradation mechanism, significantly impacts the performance of biodegradable polymers, and how the use of appropriate fillers can enhance thermal stability by mitigating chain scission. The review also discusses the application of the Arrhenius equation in modelling thermal degradation, helping predict degradation rates and optimize processing conditions. Time sweep tests are particularly emphasized for their ability to monitor polymer stability under various environmental conditions, while frequency sweep tests provide insights into the effects of processing/thermal history on material degradation. Tests at higher shear rates, which simulate real-world processing conditions such as extrusion and injection moulding, are explored for their role in understanding how processing-induced shear forces accelerate polymer degradation. Various biodegradable polymers are considered in this review, with polylactic acid (PLA) being the dominant polymer studied across most research, providing a clear picture of its degradation behaviour and strategies for enhancing its thermal stability. Therefore, it is expected that this review will be a comprehensive guide for researchers and engineers looking to optimize the thermal stability and performance of biodegradable polymers in various industrial applications.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"295 - 317"},"PeriodicalIF":2.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13367-024-00111-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-29DOI: 10.1007/s13367-024-00108-y
Juri Kim, Eun Hui Jeong, Joon Hyun Baik, Jun Dong Park
Since the dawn of human civilization, cosmetics have been an important part of life for various reasons, including aesthetic purposes, skin protection, and representing social status and ideology for social and political reasons. Nowadays, due to advances in science and technology, cosmetics comes in countless distinctive formulations, each tailored to specific purposes and preferences. Rheology has been an essential tool in designing and analyzing complex cosmetic formulations, because of inherent characteristics of their usage, which inevitably involves processes of flow and deformation. Typically, the sensory texture of cosmetic formulations has been correlated with rheological measurements. Furthermore, because the physical and chemical properties, as well as the microstructural status of cosmetic formulations, are well reflected in their rheological behavior, rheology has proven to be an effective metric for assessing stability. This review aims to provide a structured overview of how rheology has been utilized in the cosmetics field and highlight its advancements. We specifically focus on the role of rheology in analyzing the sensory texture and stability in cosmetic formulations, emphasizing a variety of previous studies. In the last part, we present latest applications of rheological analysis combined with other modern techniques, including artificial intelligence and eco-friendly technologies.
{"title":"The role of rheology in cosmetics research: a review","authors":"Juri Kim, Eun Hui Jeong, Joon Hyun Baik, Jun Dong Park","doi":"10.1007/s13367-024-00108-y","DOIUrl":"10.1007/s13367-024-00108-y","url":null,"abstract":"<div><p>Since the dawn of human civilization, cosmetics have been an important part of life for various reasons, including aesthetic purposes, skin protection, and representing social status and ideology for social and political reasons. Nowadays, due to advances in science and technology, cosmetics comes in countless distinctive formulations, each tailored to specific purposes and preferences. Rheology has been an essential tool in designing and analyzing complex cosmetic formulations, because of inherent characteristics of their usage, which inevitably involves processes of flow and deformation. Typically, the sensory texture of cosmetic formulations has been correlated with rheological measurements. Furthermore, because the physical and chemical properties, as well as the microstructural status of cosmetic formulations, are well reflected in their rheological behavior, rheology has proven to be an effective metric for assessing stability. This review aims to provide a structured overview of how rheology has been utilized in the cosmetics field and highlight its advancements. We specifically focus on the role of rheology in analyzing the sensory texture and stability in cosmetic formulations, emphasizing a variety of previous studies. In the last part, we present latest applications of rheological analysis combined with other modern techniques, including artificial intelligence and eco-friendly technologies.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"271 - 282"},"PeriodicalIF":2.2,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-28DOI: 10.1007/s13367-024-00110-4
Yuya Doi
Polymer architecture (i.e., chain connecting manner) and properties are closely correlate, and strongly influence rheological properties that reflect microscopic molecular dynamics. This review summarizes the rheological properties of ring polymers and polymers containing intramolecular loops, which are currently being studied actively in terms of sample synthesis and physical property. The ring polymers, which have a well-defined molecular architecture and free of impurities, exhibit rheological properties that differ significantly from those of their linear counterparts. Notably, even minor contamination with linear chain impurities is known to substantially alter the rheological properties of ring polymers. Theoretical molecular modeling studies are being pursed to elucidate these behaviors. The ring polymer analogues consisting of multiple ring chains or intramolecular linkages between ring and linear chains exhibit either unentangled or intermolecular penetration behavior, depending on their molecular architectures. The polymers featuring intrinsically random intramolecular loops, such as single-chain polymeric nanoparticles (SCNPs) and polymeric nanosheets, are also under active investigation in terms of both their synthesis and properties. A deeper understanding of the molecular dynamics and rheological properties of these unique architectural polymers can contribute to the further development of polymer science and industry as well as to the creation of new polymeric nano-materials.
{"title":"A review of rheology for ring polymers and polymers with internal loops: comparison of recent experimental and theoretical studies","authors":"Yuya Doi","doi":"10.1007/s13367-024-00110-4","DOIUrl":"10.1007/s13367-024-00110-4","url":null,"abstract":"<div><p>Polymer architecture (i.e., chain connecting manner) and properties are closely correlate, and strongly influence rheological properties that reflect microscopic molecular dynamics. This review summarizes the rheological properties of ring polymers and polymers containing intramolecular loops, which are currently being studied actively in terms of sample synthesis and physical property. The ring polymers, which have a well-defined molecular architecture and free of impurities, exhibit rheological properties that differ significantly from those of their linear counterparts. Notably, even minor contamination with linear chain impurities is known to substantially alter the rheological properties of ring polymers. Theoretical molecular modeling studies are being pursed to elucidate these behaviors. The ring polymer analogues consisting of multiple ring chains or intramolecular linkages between ring and linear chains exhibit either unentangled or intermolecular penetration behavior, depending on their molecular architectures. The polymers featuring intrinsically random intramolecular loops, such as single-chain polymeric nanoparticles (SCNPs) and polymeric nanosheets, are also under active investigation in terms of both their synthesis and properties. A deeper understanding of the molecular dynamics and rheological properties of these unique architectural polymers can contribute to the further development of polymer science and industry as well as to the creation of new polymeric nano-materials.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"283 - 294"},"PeriodicalIF":2.2,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-23DOI: 10.1007/s13367-024-00107-z
Yuxuan Pei, Yanjie Zhang, Chengzhi Zheng, Jian Tang, Quan Chen
Stress relaxation measurements under step strain γ are frequently utilized to characterize the nonlinear stress responses of polymeric materials. The reduction degree of the stress amplitude with increasing step strain is quantified by the so-called damping function, h(γ). In this review, we summarize a recent progress in molecular understanding of the damping behavior of associative polymers from both the experimental and theoretical perspectives. The damping is related to the rupture and reconstruction of associative network after applying step strain and before the terminal stress relaxation. Incorporation of this mechanism into the classic sticky Rouse model through the conformation pre-averaging protocol enables quantitative prediction of the damping behavior of randomly associating linear polymers as well as end-associative star polymers, both in the unentangled state.
{"title":"Nonlinear damping of associative polymers","authors":"Yuxuan Pei, Yanjie Zhang, Chengzhi Zheng, Jian Tang, Quan Chen","doi":"10.1007/s13367-024-00107-z","DOIUrl":"10.1007/s13367-024-00107-z","url":null,"abstract":"<div><p>Stress relaxation measurements under step strain γ are frequently utilized to characterize the nonlinear stress responses of polymeric materials. The reduction degree of the stress amplitude with increasing step strain is quantified by the so-called damping function, <i>h</i>(γ). In this review, we summarize a recent progress in molecular understanding of the damping behavior of associative polymers from both the experimental and theoretical perspectives. The damping is related to the rupture and reconstruction of associative network after applying step strain and before the terminal stress relaxation. Incorporation of this mechanism into the classic sticky Rouse model through the conformation pre-averaging protocol enables quantitative prediction of the damping behavior of randomly associating linear polymers as well as end-associative star polymers, both in the unentangled state.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"243 - 252"},"PeriodicalIF":2.2,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-13DOI: 10.1007/s13367-024-00105-1
Hyeong Yong Song, Si Yoon Kim, Min Seo Park, Jun Dong Park, Kyu Hyun
This study investigated the effect of mechanical stirring time on liquid gallium (Ga)-oxide amalgams using linear and nonlinear viscoelastic properties in dynamic oscillatory shear. The liquid Ga-oxide amalgams with different stirring times were prepared by exposing liquid Ga to the atmosphere under continuous stirring. Linear viscoelasticity of all amalgams exhibited an elastic-dominant behavior. When plotted versus stirring time, elastic modulus increased gradually, which was described successfully by a power-law-type equation for a percolation behavior. The nonlinear viscoelasticity of the amalgams was analyzed using the conventional strain-sweep data and the sequence of physical processes (SPP) method. The critical strain amplitudes determined from the strain-sweep data showed that the yielding of the amalgams occurred earlier and more gradually with increasing stirring time. The SPP analysis using transient Cole–Cole plots revealed that all amalgams experienced intracycle nonlinear behavior consisting of three physical processes (recovery, elastic softening, and yielding) within an oscillation cycle. Intriguingly, the structure recovery rate evaluated by the maximum intracycle elasticity exhibited a nonmonotonic behavior, where the maximum recovery rate was achieved at the stirring time of 5 min. Finally, taking both linear and nonlinear properties, we suggested a material–property co-plot for the printability evaluation of liquid Ga-oxide amalgams.
{"title":"Effect of stirring time on viscoelastic properties of liquid gallium-oxide amalgams","authors":"Hyeong Yong Song, Si Yoon Kim, Min Seo Park, Jun Dong Park, Kyu Hyun","doi":"10.1007/s13367-024-00105-1","DOIUrl":"10.1007/s13367-024-00105-1","url":null,"abstract":"<div><p>This study investigated the effect of mechanical stirring time on liquid gallium (Ga)-oxide amalgams using linear and nonlinear viscoelastic properties in dynamic oscillatory shear. The liquid Ga-oxide amalgams with different stirring times were prepared by exposing liquid Ga to the atmosphere under continuous stirring. Linear viscoelasticity of all amalgams exhibited an elastic-dominant behavior. When plotted versus stirring time, elastic modulus increased gradually, which was described successfully by a power-law-type equation for a percolation behavior. The nonlinear viscoelasticity of the amalgams was analyzed using the conventional strain-sweep data and the sequence of physical processes (SPP) method. The critical strain amplitudes determined from the strain-sweep data showed that the yielding of the amalgams occurred earlier and more gradually with increasing stirring time. The SPP analysis using transient Cole–Cole plots revealed that all amalgams experienced intracycle nonlinear behavior consisting of three physical processes (recovery, elastic softening, and yielding) within an oscillation cycle. Intriguingly, the structure recovery rate evaluated by the maximum intracycle elasticity exhibited a nonmonotonic behavior, where the maximum recovery rate was achieved at the stirring time of 5 min. Finally, taking both linear and nonlinear properties, we suggested a material–property co-plot for the printability evaluation of liquid Ga-oxide amalgams.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"375 - 386"},"PeriodicalIF":2.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-09DOI: 10.1007/s13367-024-00104-2
Luis Antonio Ramirez-Torres, Diola Marina Nuñez-Ramirez, Luis Medina-Torres, Octavio Manero
This research aims to study the rheological behavior and impurities dissolution kinetics in a bioleaching process of two particle sizes and three different pulp densities, which are analyzed and compared. It was found that the small particle size with 40% (w/w) pulp density provides the maximum dissolution of impurities in the shortest bioleaching time (in 2 days). Furthermore, through a CFD simulation in a system with 40% (w/w) pulp density and 44 μm particle size, a stirring speed of 700 rpm provides the best mixing conditions in the bioreactor, enabling good distribution of recirculation zones and adequate streamline patterns with a viscosity map that minimizes regions of high and low viscosity.
{"title":"Study of the impurity dissolution kinetics, rheological characterization, and hydrodynamic aspects during the bioleaching of iron ore pulp in a bioreactor","authors":"Luis Antonio Ramirez-Torres, Diola Marina Nuñez-Ramirez, Luis Medina-Torres, Octavio Manero","doi":"10.1007/s13367-024-00104-2","DOIUrl":"https://doi.org/10.1007/s13367-024-00104-2","url":null,"abstract":"<p>This research aims to study the rheological behavior and impurities dissolution kinetics in a bioleaching process of two particle sizes and three different pulp densities, which are analyzed and compared. It was found that the small particle size with 40% (w/w) pulp density provides the maximum dissolution of impurities in the shortest bioleaching time (in 2 days). Furthermore, through a CFD simulation in a system with 40% (w/w) pulp density and 44 μm particle size, a stirring speed of 700 rpm provides the best mixing conditions in the bioreactor, enabling good distribution of recirculation zones and adequate streamline patterns with a viscosity map that minimizes regions of high and low viscosity.</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"15 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-12DOI: 10.1007/s13367-024-00102-4
Suyeon Lee, Dayoung Kim, Dong Gi Seong
Aerogel has gained much attention as a promising nanostructure which contributes to the high dispersity of nanofillers and structural stability. However, the difficulty of fabricating robust aerogels using various nanofillers and producing aerogels for the scale-up process is still challenging for expanding applications of aerogels. We fabricate the ternary aerogel particle consisting of MXene, carbon nanotube (CNT), and polydopamine (PDA), and it has structural stability owing to the outstanding adhesion property of PDA. The fabricated aerogel particles are also highly favorable for industrial application because if its ease of handling and scaling up compared to the bulk aerogels. In this study, various parameters, such as polymerization time of PDA and fabrication method, are utilized to find the optimal conditions for fabricating robust and stable aerogel nanostructures. Ternary aerogel exhibits a unique nanostructure with self-staked MXene and bridged CNT between MXene layers, which is expected to form a more effective conducting pathway. Moreover, rheological analysis revealed that the storage modulus recovered even after severe deformation, indicating that the fabricated aerogel possesses structural stability. It is anticipated that these ternary aerogel particles have the potential to be applied in the effective platform for nanocomposites in various industrial fields.
{"title":"Construction of self-stacking nanostructure with MXene and CNT through dopamine polymerization","authors":"Suyeon Lee, Dayoung Kim, Dong Gi Seong","doi":"10.1007/s13367-024-00102-4","DOIUrl":"10.1007/s13367-024-00102-4","url":null,"abstract":"<p>Aerogel has gained much attention as a promising nanostructure which contributes to the high dispersity of nanofillers and structural stability. However, the difficulty of fabricating robust aerogels using various nanofillers and producing aerogels for the scale-up process is still challenging for expanding applications of aerogels. We fabricate the ternary aerogel particle consisting of MXene, carbon nanotube (CNT), and polydopamine (PDA), and it has structural stability owing to the outstanding adhesion property of PDA. The fabricated aerogel particles are also highly favorable for industrial application because if its ease of handling and scaling up compared to the bulk aerogels. In this study, various parameters, such as polymerization time of PDA and fabrication method, are utilized to find the optimal conditions for fabricating robust and stable aerogel nanostructures. Ternary aerogel exhibits a unique nanostructure with self-staked MXene and bridged CNT between MXene layers, which is expected to form a more effective conducting pathway. Moreover, rheological analysis revealed that the storage modulus recovered even after severe deformation, indicating that the fabricated aerogel possesses structural stability. It is anticipated that these ternary aerogel particles have the potential to be applied in the effective platform for nanocomposites in various industrial fields.</p>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"341 - 349"},"PeriodicalIF":2.2,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Magnetorheological elastomers (MREs), which can change their rheological properties under magnetic stimuli, have seen a surge of interest for their utility in sophisticated vibration isolation systems. This study investigates the impact of carbonyl iron particle (CIP) concentration and magnetic field strength during the curing process on the rheological properties of MREs. An Artificial Neural Network (ANN) model using Bayesian optimization was also developed to predict properties and its accuracy was confirmed by comparing it with the experimental results. MRE samples with varying volumes of CIPs (5, 10, 15, and 20%) were prepared using a matrix of room temperature vulcanized silicon elastomer, specifically Elastosil 4511. During the curing process, MRE samples were subjected to different magnetic field strengths (0, 0.15, 0.3, 0.5 T). The rheological behavior was analyzed using a dynamic shear rheometer (DSR), conducting amplitude, frequency, and magnetic sweep experiments. The study reveals that higher CIP concentrations initially increase MRE stiffness, but a pronounced Payne effect emerges at higher strains. Furthermore, elevated curing magnetic fields and magnetic sweeps significantly enhance MRE stiffness and response. The optimized ANN model, developed through the Bayesian method, demonstrated a marked potential in accurately predicting the behavior of MREs under various conditions.
{"title":"Dynamic rheological behavior and ANN model with Bayesian optimization for elastosil-based magnetorheological elastomers","authors":"Nishant Kumar Dhiman, Sandeep M. Salodkar, Gagandeep Sharma, Chander Kant Susheel","doi":"10.1007/s13367-024-00103-3","DOIUrl":"10.1007/s13367-024-00103-3","url":null,"abstract":"<div><p>Magnetorheological elastomers (MREs), which can change their rheological properties under magnetic stimuli, have seen a surge of interest for their utility in sophisticated vibration isolation systems. This study investigates the impact of carbonyl iron particle (CIP) concentration and magnetic field strength during the curing process on the rheological properties of MREs. An Artificial Neural Network (ANN) model using Bayesian optimization was also developed to predict properties and its accuracy was confirmed by comparing it with the experimental results. MRE samples with varying volumes of CIPs (5, 10, 15, and 20%) were prepared using a matrix of room temperature vulcanized silicon elastomer, specifically Elastosil 4511. During the curing process, MRE samples were subjected to different magnetic field strengths (0, 0.15, 0.3, 0.5 T). The rheological behavior was analyzed using a dynamic shear rheometer (DSR), conducting amplitude, frequency, and magnetic sweep experiments. The study reveals that higher CIP concentrations initially increase MRE stiffness, but a pronounced Payne effect emerges at higher strains. Furthermore, elevated curing magnetic fields and magnetic sweeps significantly enhance MRE stiffness and response. The optimized ANN model, developed through the Bayesian method, demonstrated a marked potential in accurately predicting the behavior of MREs under various conditions.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"351 - 374"},"PeriodicalIF":2.2,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141921247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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