Article
Biochemical Research Methods
Tianlong Zhang, Hangrui Liu, Kazunori Okano, Tao Tang, Kazuki Inoue, Yoichi Yamazaki, Hironari Kamikubo, Amy K. Cain, Yo Tanaka, David W. Inglis, Yoichiroh Hosokawa, Yalikun Yaxiaer, Ming Li
Summary: In this study, we achieved shape-based separation of drug-treated Escherichia coli (E. coli) using viscoelastic microfluidics. The ability to separate bacterial populations based on their shape has significant implications for various applications. The separation performance of the microfluidic device was influenced by the sheath-to-sample flow rate ratio and the concentration of poly-ethylene-oxide (PEO).
Article
Polymer Science
Hui Yang, Evelyne van Ruymbeke, Charles-Andre Fustin
Summary: This study systematically investigates the viscoelastic properties of DCN, IPN, and DN hydrogels using oscillatory shear rheology. The results show that all double dynamics hydrogels have a higher plateau modulus than the sum of the single networks, indicating a synergetic effect. Furthermore, the relaxation behaviors of the hydrogels are influenced by the dynamics of the corresponding single dynamic networks.
Article
Chemistry, Multidisciplinary
Arsalan Nikdoost, Pouya Rezai
Summary: This paper investigates the migration and focusing behavior of microparticles in curved microchannels with viscoelastic fluids. The effects of flow velocity, fluid viscoelasticity, and particle size are studied. It is found that the introduction of fluid viscoelasticity enhances microparticle focusing, but the dominance of Dean drag force disrupts focusing at high velocities. The particle behavior is categorized using a non-dimensional analysis. The research findings can contribute to the design of future particle sorting and washing devices.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Yunmao Zhang, Yuhang Han, Xiaoliang Ji, Duyang Zang, Long Qiao, Zhizhi Sheng, Chunyan Wang, Shuli Wang, Miao Wang, Yaqi Hou, Xinyu Chen, Xu Hou
Summary: This study demonstrates a novel air purification method that uses an ion-doped conjugated polymer-coated matrix infiltrated with a functional liquid. The system achieves efficient, continuous and maintenance-free air purification with high efficiency and dust-holding capacity. It is durable, resistant to fouling and corrosion, and the liquid as a filter can be reused and adjusted for additional functions.
Article
Mechanics
Di Li, Xiangchun Xuan
Summary: This study investigates particle migration in microfluidic manipulation, showing that particles migrate towards the centerline and corners in a viscoelastic flow. The migration is influenced by polymer length.
Article
Mathematics, Applied
Xumin Gu, Yu Mei
Summary: This article investigates the free boundary problem of compressible isentropic neo-Hookean viscoelastic fluid equations with surface tension. By studying the regularity of classical solutions to the viscoelastic fluid equations in Sobolev spaces, we find that these solutions are uniform in viscosity, and justify the corresponding vanishing viscosity limits. The research results indicate that there is no boundary layer in the free boundary problem of compressible viscoelastic fluids.
SCIENCE CHINA-MATHEMATICS
(2023)
Article
Physics, Fluids & Plasmas
Manish Kumar, Arezoo M. Ardekani
Summary: In this study, we numerically investigate flow states induced by viscoelastic instability in channels, and study the effects of fluid rheological properties and inlet flow rates on the hysteresis loop.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Polymer Science
Roko Blazic, Katarina Marusic, Elvira Vidovic
Summary: The grafting of a stimuli-responsive polymer onto cellulose was achieved using free radical polymerization in cellulose solution. Subsequent ionizing radiation increased the grafting and crosslinking efficiency in the material. The prepared hydrogels exhibited suitable properties for biomedical applications, including solid-like behavior and a complex modulus in the range of 14-39 kPa. The introduction of PDMAEMA enhanced the ability of the hydrogels to synthesize Ag particles and absorb Fe3+ ions, making them potential candidates for wound treatment.
Article
Engineering, Chemical
Carsten Rene Arlt, Dominik Brekel, Matthias Franzreb
Summary: The production of high-quality nanoparticles is important for various industrial applications. Current purification methods may not meet the required quality, leading to the need for additional steps. This study introduces a scalable system that can continuously fractionate nanoparticles based on their magnetic properties, offering a potential alternative to demanding and expensive nanoparticle fractionation methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Mechanics
Li Gaojin, Lauga Eric, Arezoo M. Ardekani
Summary: The article reviews the locomotion of microorganisms and spermatozoa in complex viscoelastic fluids, discussing their responses to different propulsion mechanisms and physical factors. It summarizes the theoretical approaches for modeling microswimming in viscoelastic fluids and recent progress in studying single cell mobility in unbounded viscoelastic fluids. Lastly, it examines the impact of viscoelasticity on microswimmers' dynamics and collective cellular behavior.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Ting Lu, Shuangshuang Zhou, Ronggang Ma, Dongming Qi, Yangyi Sun, Dong Zhang, Jingang Huang, Hongting Zhao
Summary: This study synthesized and evaluated three tertiary amine polymer-grafted magnetic nanoparticles (MNPs) for their demulsification performance. The results showed that high positive charge density and superior interfacial activity of MNPs could cause partial oil droplet re-dispersion, leading to a lower magnetic separation efficiency and narrower demulsification window. Wide demulsification windows were observed when MNPs carried lower positive charge density or weak interfacial activity. The recycling experiment demonstrated their satisfactory recyclability.
Review
Nanoscience & Nanotechnology
Hao Tang, Jiaqi Niu, Han Jin, Shujing Lin, Daxiang Cui
Summary: Passive and label-free microfluidic devices, with their simple design and reliance on geometric structure, have become popular in medical and bioresearch applications. This review discusses the importance of geometric design principles in passive and label-free microfluidics and summarizes the most creative innovations in microfluidic schemes such as deterministic lateral displacement, inertial microfluidics, and viscoelastic microfluidics. The aim of this review is to provide researchers with a guideline for incorporating geometric innovations into passive and label-free microfluidics.
MICROSYSTEMS & NANOENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Chen Shen, Yasufumi Oda, Masaki Matsubara, Jun Yabuki, Shinya Yamanaka, Hiroya Abe, Makio Naito, Atsushi Muramatsu, Kiyoshi Kanie
Summary: This study focuses on surface-modified Fe3O4@SiO2 particles with controlled sizes and shapes applied in magnetorheological (MR) fluids. Results show that surface modification with DTM improves dispersion stability, and the introduction of anisotropic shapes and increase in particle size contribute to the enhancement of MR properties.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Tianlong Zhang, Amy K. Cain, Lucie Semenec, Ling Liu, Yoichiroh Hosokawa, David W. Inglis, Yaxiaer Yalikun, Ming Li
Summary: Here, we demonstrate the separation and enrichment of Escherichia coli clusters from its singlets using a viscoelastic microfluidic device. The ability to obtain highly pure populations of E. coli clusters is crucial for various applications in biology, biomedicine, and industry. Experimental results show that particles of different sizes migrate towards the center of the channel due to the combined effects of inertial and elastic forces. The size-dependent separation efficiency is influenced by channel length, sheath-to-sample flow rate ratio, and poly(ethylene oxide) concentration.
ANALYTICAL CHEMISTRY
(2023)
Article
Mechanics
Hualong Feng, Amlan Barua, Shuwang Li, Xiaofan Li
Summary: This study investigates the disturbance flow generated by the oscillatory motion of a solid particle in linear viscoelastic fluids. The fluid dynamics are computed using an accurate boundary integral method with third-order accuracy in space. The results show that the eddies generated in linear viscoelastic fluids are different from those in Newtonian fluids.
