Article
Mechanics
P. Kaushik, Sudip Shyam, Pranab Kumar Mondal
Summary: This paper discusses the enhancement strategy of important fluidic functionality, mixing, in an on-chip device embedded in a rotating disk. The analysis considers the effect of rotation and uses classical fluid dynamic equations to comprehensively describe the mixing process. Experiments performed in the case of pure diffusion verify the numerical results effectively. The results show that molecular diffusion and rotation-induced forcing modulate the mixing process in the portable fluidic device, and strong advective transport of species resulting from higher rotational effect can enhance mixing even at short distances.
Article
Chemistry, Physical
Shuyue Jiang, Haifeng Zhang, Liang Chen, Yiping Li, Shengtian Sang, Xiaowei Liu
Summary: This paper proposes an open microfluidic chip based on super-wettability surface to avoid traditional bonding technology, and demonstrates its capability of achieving stable electroosmotic flow.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Pearanat Chuchard, Nattakarn Numpanviwat
Summary: This study presents a mathematical model for pressure-driven and electroosmotic flow through elliptic microchannels under the slip-fluid condition, and investigates the effect of channel cross-section eccentricity on the volumetric flow rate.
Article
Chemistry, Analytical
Niu Feng, Xuewen Peng, Zhipan Wang, Xiaoping Yu, Xuping Shentu, Yiping Chen
Summary: Pursuing convenient operations and precise testing has become an urgent requirement in clinical diagnosis, treatment, and prognosis. This study constructed a label-free electroosmotic flow-driven microchannel (LF-EMB) biosensor based on the dual properties of highly selective antibody-antigen recognition and potential signaling of biomolecules. The LF-EMB demonstrated outstanding sensitivity and detection speed, providing a convenient option for the quantitative detection of inflammatory markers and antibiotics.
ANALYTICAL CHEMISTRY
(2022)
Article
Metallurgy & Metallurgical Engineering
N. G. S. Almeida, V. S. T. Ciminelli, P. R. Cetlin, D. Majuste
Summary: To increase productivity and reduce operating costs, a moderate adhesion between electroplated metal and the mother blank is required. This study used finite element analysis (FEA) to investigate the influence of deposit thickness and adhesion strength on the stripping behavior of zinc deposits, while experimental measurements were conducted to evaluate the effect of cathode surface roughness and repeated use of the cathode. The results demonstrate the relationship between cathode roughness, adhesion strength, and the amount of residual zinc particles on the aluminum surface, providing insights into maximizing productivity and reducing operating costs by minimizing zinc sticking.
Article
Automation & Control Systems
Wang Shuaipu, Liang Jie
Summary: A variable feed drilling method based on a sinusoidal curve is proposed to reduce delamination damage and improve drilling quality in CFRP drilling. Experimental results show that this method can reduce the thrust force near the hole exit and improve surface quality and hole wall morphology.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Energy & Fuels
Biswajit Gayen, Nirmal Manna, Nirmalendu Biswas
Summary: This study aims to improve the mixing efficiency of two different concentration fluids in a micromixer using electrokinetic effects. Four microelectrodes are placed on the outer surface of the micromixer chamber, and rigid baffles are considered at the inlet to enhance mixing quality. Various parameters such as inlet velocity, AC frequency, voltage amplitude, baffle inclination angle, and baffle orientation are investigated. Rapid mixing is achieved in the microchamber, with the best mixing quality (99.67%) obtained at a low inlet velocity of 0.05 mm/s. The lowest mixing quality (15.78%) is observed at higher inlet velocity with a high frequency of AC electric field.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Mathematics, Interdisciplinary Applications
Fei Liu, Dalei Jing
Summary: This work presents a mathematical model to calculate the flowrate of combined EOF and PDLF in a symmetric tree-like microchannel network, with numerical analysis validating the model. The optimal diameter ratio for maximizing the flowrate is found to be dependent on various factors such as branching number, level, and channel length ratio. The transition of the optimal diameter ratio from N-1/3 for pure PDLF to N-1/2 for pure EOF is discussed in relation to the increasing ratio of driven voltage and pressure.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2021)
Article
Materials Science, Ceramics
Shan-Fei Wang, Yi Wang, Xiang-Yu Liang, Zhuang-Zhuang Liu, Wen-Hua Suo, Hong-Li Suo
Summary: Solution deposition planarization (SDP) is an efficient flattening technique for surface smoothing, but it still faces challenges in achieving edge crack-free surfaces while preparing Y2O3 coating, especially during drying and heat treatment processes.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
D. D. Ma, Y. X. Tang, G. D. Xia
Summary: The sinusoidal wavy microchannels with secondary channels (SWSC) show better heat removal performance in flow boiling studies compared to conventional microchannels, thanks to increased bubble nucleation induced by enlarged surface area and continuous development of thin liquid film due to the introduction of secondary channels. However, the SWSC microchannels suffer from a higher pressure drop penalty.
APPLIED THERMAL ENGINEERING
(2021)
Article
Mathematics, Applied
Mohammad Saeed Borji, Jafar Jamaati, Mehdi Bahiraei
Summary: This numerical study investigates the effect of temperature, heat transfer, surface heterogeneity, and electroosmotic flow on mixing in microchannels. The study assumes that fluid properties and surface zeta potentials are temperature dependent. The governing equations, including the Laplace equation, Poisson equation, Navier-Stokes equation, propagation equation, and energy equation, are solved using the finite element method. The study analyzes the flow rate, mixing efficiency, and mixing capacity in convergent/divergent and straight microchannels under different temperatures, and explores the performance of different geometries in flow transfer and mixing development.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Chemistry, Physical
Chun-Ting Wu, Jyh-Ping Hsu
Summary: The presence of a functional layer greatly influences the electrokinetic behavior of a bullet-shaped nanopore, especially by affecting the electroosmotic flow to make the ionic profile more uniform inside the modified layer.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Coatings & Films
Jiuyue Zhao, Jinyuan Tang, Weihua Zhou, Tingting Jiang, Hao Wu, Xianggui Liao, Minzhi Guo
Summary: A sequential coupled DEM-FEM method is proposed in this paper to predict the surface integrity of gear shot peening. This method provides an effective tool for optimizing the gear shot peening technology and can be extended to other industrial parts with complex shapes.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Priyanka Koner, Subrata Bera, Hiroyuki Ohshima
Summary: The theoretical analysis of the mass transfer process in an oscillatory electroosmotic flow (EOF) is studied in a fractional Jeffrey fluid model with a polyelectrolyte layer (PEL) coated cylindrical annulus. The ion partitioning effect is observed due to the difference in permittivity between PEL and the electrolyte solution. Analytical solutions for induced potential and axial velocity are presented for both the PEL and electrolyte regions. The separation of species depends on various factors such as the Damkohler number, absorption parameter, and phase partitioning coefficient.
Article
Thermodynamics
Yong Guo, Chuan-Yong Zhu, Liang Gong, Zong-Bo Zhang
Summary: The effect of surface roughness on the thermal-hydraulic performance of flow boiling in microchannel was investigated using the Fourier series method to generate a surface with random roughness, and the VOF model and Lee model were used for simulation. The results showed that increasing relative roughness initially increased and then decreased Nu and fRe. Microchannels with rough surfaces achieved better thermal-hydraulic performance than those with smooth surfaces. The best thermal-hydraulic performance was observed at a relative roughness of 0.304%. Additionally, increasing the mean width of roughness elements resulted in gentler surface undulation, slower growth rate of Nu, and monotonously increasing fRe. Furthermore, decreasing inlet velocity led to drying up of the liquid film at the bottom of bubbles, resulting in drought spots on the bottom wall and deteriorated heat transfer performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)