Article
Materials Science, Multidisciplinary
Roman Grimmig, Philipp Gillemot, Simon Lindner, Philipp Schmidt, Samuel Stucki, Klaus Guenther, Helmut Baltruschat, Steffen Witzleben
Summary: This study develops potentiometric ionic polymer metal composite (IPMC) sensors for the determination of dissolved ozone in ultrapure water systems. The commercially available polymer electrolyte membranes are treated to obtain nanostructured platinum layers. Experimental results indicate that the platinum concentration of the impregnation solution has the highest influence on the metal loading. The sensor response behavior can be explained by a Langmuir pseudo-isotherm model and allows for quantification of dissolved ozone to trace levels of less than 10 μg/L.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Marine
Changsheng Chen, Guoping Li, Zhenlai Ma, Ziyi Mei, Bo Gao, Ning Zhang
Summary: The acoustic characteristics induced by the flow field of podded propulsors were investigated using high-precision unsteady numerical simulation and analysis methods. The results showed the dominance of blade passing frequency and shaft frequency as the primary characteristic frequencies, and the spatial distribution of sound pressure was closely related to the pod structure.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Analytical
Sangwoon Lee, Lira Hwang, Jang Yeol Lee, Taewook Yang, Jae Young Jho, Jong Hyuk Park
Summary: A new method of preparing IPMCs by stacking a polymer membrane soaked in ionic liquid at high temperatures between two electrode layers has been proposed. These stacked IL-IPMCs exhibit a surface resistance 10 times lower than conventional IL-IPMCs and actuation performance comparable to water-IPMCs. Most importantly, the stacked IL-IPMCs maintain over 95% of their performance even after several days of actuation.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Sangwoon Lee, Young Eun Choi, Jang Yeol Lee, Taewook Yang, Jae Young Jho, Jong Hyuk Park
Summary: Increasing the ion content and water uptake in the ion-exchange membrane can enhance the performance of IPMCs. However, the trade-off between displacement and force has been a challenge. In this study, we reinforced the Nafion membrane with a silica network and obtained IPMCs with improved displacement and blocking force, showing their applicability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Energy & Fuels
Rui Zhang, Huan Pang
Summary: Graphene, with its distinguished structure and excellent physicochemical properties, has great application potential as electrode material in supercapacitors. Recent research has reviewed the synthesis and application of porous electrode graphene materials in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2021)
Review
Chemistry, Multidisciplinary
Yuqing Dong, Ka-Wai Yeung, Chak-Yin Tang, Wing-Cheung Law, Gary Chi-Pong Tsui, Xiaolin Xie
Summary: This review provides an overview of the design and fabrication of IL-iEAP transducers for advanced applications in biological and electronic fields. It discusses the classification of iEAP with different actuation mechanisms and various preparation methods, as well as the advanced functions of IL-iEAP in actuating and sensing. The prospects of novel nanotechnologies used for fabricating IL-iEAPs and their applications in MEMS are also discussed.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Sooraj Narayan, Eric M. Stewart, Lallit Anand
Summary: A new theory for modeling the actuation response of ionic polymer-metal composites has been developed, showing potential in soft-robotics applications through numerical simulations and experimental validation.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Environmental Sciences
Saptarshi Roy, Md. Ahmaruzzaman
Summary: Water pollution is a severe problem that threatens the sustainability of human and other life forms. Ionic liquids have shown potential as sustainable materials in wastewater treatment and have achieved effective results. This review explores the application of Ionic liquid-based nano adsorbents in the removal of organic compounds, dyes, and heavy metal ions, discussing the factors influencing the adsorption process and the mechanisms involved.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Engineering, Environmental
Hong Wang, Liang Yang, Yanning Yang, Dongsheng Zhang, Aifen Tian
Summary: Intelligent materials are significant in the modern development of high-tech new materials, achieving the structural functionalization and functional diversification. Ionic polymer metal composite (IPMC) artificial muscle, as a new type of intelligent material, is considered as the ideal material for developing the next generation of flexible robots. This paper analyzes the working principle of IPMC from a microscopic perspective and categorizes the fabrication technologies into single and combined techniques, with an emphasis on the effective combination of different methods. The properties of IPMC prepared by different methods are analyzed and compared, and the research advances in flexible actuation robots and intelligent sensing systems are examined. The future development directions are also discussed. This paper provides guidance for fabricating high-performance IPMC and lays a theoretical foundation for the design and application of IPMC.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
A. Varghese, K. R. S. Devi, F. Kausar, D. Pinheiro
Summary: Electricity is a versatile energy form but faces the challenge of not being easily stored. Supercapacitors can solve this problem. This review discusses the electrochemical studies and synthesis methods of metal oxide composites based on polymers such as polyaniline and polypyrrole, providing insight into the selection of suitable electrode materials for electrochemical applications. The review also explores different fabrication methods and the performance of polymer based metal oxide composites for energy applications, highlighting the enhancement of capacitance through the incorporation of various materials.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Materials Science, Composites
Eduardo Fischer Kerche, Eduardo Fonseca, Henri Stephan Schrekker, Sandro Campos Amico
Summary: This article provides an overview of the use of ionic liquids (IL) as compatibilizers in epoxy-based composites and discusses their effects. The results show that IL can enhance the interfacial interactions between reinforcements and epoxy matrix, leading to improved mechanical and thermal performances of the composites. It is suggested that further research is needed to explore strategies for using low IL content and to investigate the relationship between filler structure and composite properties.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Navid H. Arani, Majid Eghbal, Mohammad Mahdi Nekahi, Marcello Papini
Summary: An SPH/FEM model was developed to simulate the erosion of zirconia particle-reinforced epoxy composites, and erosion tests were performed to verify the model, showing significantly lower erosion rates for zirconia-reinforced composites compared to neat epoxy. The experimentally-observed erosion mechanisms were successfully simulated by the model, with predicted erosion rates matching measured values with an error range of 2% to 11%.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Physical
Binghua Zhou, Ying Zhou, Lujie Lai, Ziling Chen, Jiajia Li, Yunliang Jiang, Jian Liu, Zhipeng Wang, Zhigang Xue
Summary: A series of borate-based porous polymer electrolytes (B-PPEs) with enhanced ionic conductivity and stability were prepared by incorporating copolymers into PVDF matrix. The well-interconnected pores, improved lithium-ion transference number, and higher capacity retention make B-PPEs a promising candidate for enhancing the safety and electrochemical properties of lithium metal batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yeonbae Lee, Minjun Kim, Heein Kim, Keun Hyung Lee, Sangwon Kim
Summary: The development of reversible nanostructural associations in graft copolymer architecture has enabled the fabrication of tough polymer electrolyte composites that exhibit autonomous self-healing properties at room temperature. Random copolymers were used to form network structures, achieving remarkable mechanical properties and enabling its application in strain sensors.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Siyuan Wu, Xiaomeng Li, Zhen Ge, Yunjun Luo
Summary: This study investigated GAP adhesive-based polymer films with different curing parameters and energetic polymer composites with varying RDX contents. The tensile strength and elongation at the break of the polymer film were measured, showing a complete cross-linking network and high hydrogen bonding interaction. The addition of 40% RDX resulted in decreased tensile strength and elongation at the break, but also a lower residue carbon rate. The tensile cross-sections of the energetic polymer composites were observed by SEM.
Article
Physiology
K. A. Zuj, E. T. Hedge, J. D. Milligan, S. D. Peterson, R. L. Hughson
Summary: This study found that applying intermittent compression to the lower legs of older adults can increase mean arterial blood pressure and middle cerebral artery blood velocity, providing benefits during seated rest and during the transition from sitting to standing posture.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2021)
Article
Acoustics
Jonathan J. Deng, Mohamed A. Serry, Matias Zanartu, Byron D. Erath, Sean D. Peterson
Summary: This study investigates how compensating for mask wearing and social distancing affects measures associated with vocal health. The results suggest that sustaining target levels of intelligibility and/or sound intensity while using protective measures may require increased subglottal pressure, potentially leading to vocal hyperfunction.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Cederick Landry, Sean D. Peterson, Arash Arami
Summary: This study proposes a fusion approach to improve the accuracy and estimate the uncertainty of cuffless blood pressure (BP) monitoring. Different models were used to estimate BP and clustering methods were employed to assign new BP estimates to corresponding clusters and estimate the prediction interval (PI). The results showed that model fusion improved the estimation accuracy of BP and PI.
SCIENTIFIC REPORTS
(2022)
Article
Audiology & Speech-Language Pathology
Mohsen Motie-Shirazi, Mattas Zanartu, Sean D. Peterson, Daryush D. Mehta, Robert E. Hillman, Byron D. Erath
Summary: This study experimentally evaluated the impact of compensating for the adverse acoustic effects of a posterior glottal opening (PGO) on the risk of vocal fold trauma. The results showed that increasing subglottal pressure to compensate for decreased sound pressure level due to a PGO resulted in higher collision pressure and dissipated collision power. Additionally, an optimal value of supraglottal compression was found to maximize radiated sound pressure level. It was also noted that the risk of vocal fold damage cannot be fully characterized by peak collision pressure alone.
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH
(2022)
Article
Biology
Maurizio Porfiri, Peng Zhang, Sean D. Peterson
Summary: This study investigates the mechanism of rheotaxis in fish by modeling their trajectories and orientation in fluid. It reveals a critical flow speed for successful orientation and points out the limitations of existing experimental methods in studying rheotaxis.
Article
Mechanics
Supun Pieris, Serhiy Yarusevych, Sean D. Peterson
Summary: The aerodynamics of finite-span inclined flat plates in ground effect were experimentally investigated. The study showed that ground effect is significant, particularly near stall angles, causing significant changes to flow development. At sufficiently low pre-stall angles, the increase in edge velocity led to greater suction, generating higher lift with minimal increase in drag. There were some differences observed between positive and negative orientations, with the plate in a positive orientation experiencing a greater overall increase in loading.
Article
Biophysics
Jonathan J. Deng, Sean D. Peterson
Summary: Grouping the thin epithelium and thicker superficial lamina propria layers into a single cover layer has been widely adopted, but recent studies suggest that inclusion of a distinct epithelial layer leads to more physiologically representative motion. This study explores the ramifications of incorporating an epithelial layer into a cover grouping for vocal fold modeling. The results show that careful treatment of the epithelium is recommended, particularly when estimating measures dependent upon internal stress/strain and/or collision pressure.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2023)
Article
Biophysics
Mohamed A. Serry, Cara E. Stepp, Sean D. Peterson
Summary: This study aims to elucidate the mechanisms of fundamental frequency patterns in different phonetic contexts during phonation onset. The study finds that the increasing trend in fundamental frequency for initial/isolated vowels is caused by the intensifying collision, while the decrease in fundamental frequency for vowels preceded by voiceless consonants is associated with the reduction in cricothyroid muscle activation.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2022)
Article
Acoustics
Mohsen Motie-Shirazi, Matias Zanartu, Sean D. Peterson, Daryush D. Mehta, Robert E. Hillman, Byron D. Erath
Summary: Synthetic vocal fold replicas were used to investigate the impact of nodule size and stiffness on the kinematic, aerodynamic, and acoustic aspects of voice production. The study found that increasing nodule diameter led to higher open quotient, phonation threshold pressure, and phonation threshold flow rate. However, changes in nodule elasticity did not have a significant effect on these measures. Both nodule size and stiffness resulted in a significant increase in the ratio of collision pressure to subglottal pressure. This suggests that the growth and fibrosis of nodules can contribute to vocal hyperfunction and phonotrauma.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Biology
Peng Zhang, Sean D. Peterson, Maurizio Porfiri
Summary: Understanding the hydrodynamics of fish swimming is crucial for studying fish orientation and schooling behavior. In this study, dipole-based models were validated using computational fluid dynamics (CFD) simulations informed by experimental data. A new model, replacing vortices with sheets, showed improved accuracy in predicting fluid flow around swimming fish.
JOURNAL OF THEORETICAL BIOLOGY
(2023)
Article
Computer Science, Information Systems
Cederick Landry, Eric T. Hedge, Richard L. Hughson, Sean D. Peterson, Arash Arami
Summary: This study developed and evaluated an accurate cuffless method for blood pressure estimation during moderate- and heavy-intensity exercise. Population-based NARX models performed better than other models, but were unable to track consistent decreases in blood pressure caused by reduction in vascular resistance. Periodic calibration improved the performance of the models.
IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS
(2022)
Article
Mechanics
Supun Pieris, Serhiy Yarusevych, Sean D. Peterson
Summary: The aerodynamics of finite-span inclined square flat plates in ground effect were studied experimentally. The effects of yaw angle and gap ratio on flow development and structural loadings were investigated using load cell measurements, flow visualization, and particle image velocimetry. The results revealed that the ground effect was significantly modified by the yaw angle and the gap ratio, leading to changes in suction side flow, total force, and moment. These findings have practical applications in the design of photovoltaic support structures based on wind direction and ground clearances.
Article
Mechanics
Jiacheng Hu, Sean D. Peterson
Summary: Competing models have emerged recently in search of a finite-time singularity of Euler's equation by employing anti-parallel vortex collision. The vortex sheet model and the 'tent' model, proposed by Brenner et al. and Moffatt & Kimura, respectively, simulate the evolution of interacting anti-parallel vortices. This study uses contour dynamics to explore the inviscid evolution of a vortex dipole subjected to an external strain flow, revealing compressing behavior and the transition from a head-tail structure to vortex sheets. The findings offer insights into the cascade models and suggest limits for the 'tent' model.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Biomedical
Mohamed A. Serry, Gabriel A. Alzamendi, Matias Zanartu, Sean D. Peterson
Summary: This study introduces a vocal fold model that can simulate incomplete glottal closure patterns, providing insights into the underlying physical mechanisms. By analyzing muscle activations, different vocal fold geometries and glottal closure patterns can be observed.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Acoustics
Gabriel A. Alzamendi, Sean D. Peterson, Byron D. Erath, Robert E. Hillman, Matias Zanartu
Summary: Poor coordination of laryngeal muscles may be a major cause of common voice disorders. Abnormal activity in antagonistic laryngeal muscles plays a key role in altering normal vocal fold biomechanics. Current models do not adequately capture the co-contraction of antagonistic muscle pairs. A new self-sustained triangular body-cover model with full intrinsic muscle control is introduced, which accurately simulates vocal fold posturing. This tool can be used for comprehensive investigations of non-phonotraumatic vocal hyperfunction and other laryngeal motor control disorders in the future.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
