A5083707395- Concrete Corrosion and Durability
- Structural Engineering and Vibration Analysis
- Smart Materials for Construction
- Microfluidic and Bio-sensing Technologies
- Civil and Geotechnical Engineering Research
- Structural Behavior of Reinforced Concrete
- Structural Analysis and Optimization
- Microfluidic and Capillary Electrophoresis Applications
- Structural Response to Dynamic Loads
- Transportation Safety and Impact Analysis
- Odor and Emission Control Technologies
- S100 Proteins and Annexins
- Polymer composites and self-healing
- Advanced Sensor and Energy Harvesting Materials
- Railway Engineering and Dynamics
- Mechanical Behavior of Composites
- Innovative Energy Harvesting Technologies
- Marine Biology and Environmental Chemistry
- Polymer Nanocomposites and Properties
- Structural Analysis of Composite Materials
- Electrowetting and Microfluidic Technologies
- Corrosion Behavior and Inhibition
- Elevator Systems and Control
- Electric and Hybrid Vehicle Technologies
- Advanced Glycation End Products research
University of Hong Kong
2024
Nano and Advanced Materials Institute
2024
Hainan Medical University
2024
Hainan General Hospital
2024
Chinese University of Hong Kong
2024
Hezhou University
2023
City University of Hong Kong
2019-2022
Inner Mongolia University
2022
Jinggangshan University
2022
Xi’an University
2012-2019
Wearable electronics have attracted extensive attentions over the past few years for their potential applications in health monitoring based on continuous data collection and real-time wireless transmission, which highlights importance of portable powering technologies. Batteries are most used power source wearable electronics, but unfortunately, they consist hazardous materials bulky, limit incorporation into state-of-art skin-integrated electronics. Sweat-activated biocompatible batteries...
Abstract The moisture absorption and diffusion characteristics of epoxy‐based nanocomposites containing nano‐calcium carbonate (nano‐Ca CO 3 ) are investigated. Although the decreased with increasing nano‐Ca content except for 8 wt%, behaviors were different from each other. It was found that incorporation 2 wt% 4 capacity effectively. This is due to more uniform distribution particles, which created a longer path molecules in nanocomposites. For rate moisture, there no significant change...
Interfacial bonding integrity between different materials is critical to maintain the functionality of entire physical system in any scale, ranging from building structures down semiconductor transistors. For example, micro-patterned polymers embedded with conductive nanoparticles [e.g., carbon nanotubes (CNTs)] bonded integrated circuits have been applied as many emerging chemical/biological microelectronic sensors. Nonetheless, it challenging measure and ensure interfacial for consistent...
The SiO 2 coated sphere and flaky carbonyl iron powders (CIPs) heterogeneous nanocomposites have been prepared through the Stöber method subsequently, an annealing process for eliminating crystal defect enhancing insulation oxidation resistance of shell. CIP@SiO were characterized by X‐ray diffraction (XRD), Fourier Transform infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), Thermogravimetric (TG) analysis Vector Network Analyzer (VNA). CIP surface had successfully...
The most fundamental parameter that controls the properties of fiber/epoxy composites is fiber content. Thus, exact calculation carbon content important for product quality control and process optimization. In this study, four methods calculating continuous were investigated. These are processing statistical (PS), optical microscopy (OM), thermogravimetric analysis (TGA), carbonization-in-nitrogen (CIN). results show CIN PS have high repeatability with no more than 4.7 wt.% deviation, a...
Particles and cells can be patterned moved (i.e., manipulated) precisely using acoustically driven techniques. To date, application of acoustic particle manipulation has been limited to plain surfaces. There is much potential for applying techniques surfaces with microfabricated structures high-throughput sensing. But adding thin film could alter characteristics compared a surface. Using two-chip setup that allows the wave generating device reused, we study feasibility acoustofluidic...
New polyaspartic ester (PAE) chain extender named PAE-f was prepared via two steps of Michael addition reactions:(1) reaction between 4,4’-methylenebis(2-methyl cyclohexyl amine) (Laromin C260) and excessive dialkyl maleates（DEF）; (2) The the residual maleates step (1) with polyester polyamine Jeffamine D230. two-steps method proposed could reduce time in comparison current one method, thus satisfying industrialized production. PAE based polyureas were synthesized by reacting aliphatic...
The latest progress in temperature-induced self-assembly transformation on solid surfaces was discussed.
Constrained layer damping treatments such as sandwich beams are considered the most efficient way of introducing vibration into a structure. The dynamic mechanical properties and behavior laminated composite beam inserted with viscoelastic is investigated. A quantitative analysis in has been conducted through theoretical experimental method. Traditional epoxy new kind polyurea selected to analyze properties. Results showed that had good dumping capability. effects temperature, frequency on...
In this paper the effect of curing temperature on morphology and properties PAE based polyureas were evaluated using FTIR, AFM electrochemical impedance spectroscopy (EIS). The prepared from synthesized chain extenders hexamethylene diisocyanate（HDI）trimer/polytetramethylene ether glycol (PTMG) prepolymer. investigated through EIS atomic force microscope(AFM). results indicated that has a great influence polyureas. FTIR studies showed hydrogen-bonded urea carbonyl are increased 74.3% to...
Acoustic concentration of micro/nanoparticles and cells on low-cost periodic patterned chips by operating over a wide frequency range.
This paper mainly studies the mechanical properties and microstructure of polyurea coatings (SPUA) through experiment dry-wet circulation. The influence different curing time SPUA coating before after dry cycle surface morphology changes were researched. Use alternating temperature low bending tests to research,the variation time. result circulation shows that tensile strength cured 1d, 3d 7d 30d increased 9.6%、19.2% 44.7% respectively, tear 3.2%、5.6% 47.3% respectively. research 30 times...
Coating protection becomes the primary and available method for of marine concrete. Aliphatic polyurea is a new genre polyurea. In present study, frost resistance property adhesion 2 different aliphatic coated concretes under salt fog exposure were studied first time. The surface morphology molecular structure coating investigated through SEM FTIR. investigations on influence to PAE-t-HDI prepolymer-D2000H65 (T3) concrete T3 finishing coat/ MDI emulsion primer (TM) reported that after 300...
Researches of spray pure polyurea technology for hydraulic concrete protection in water conservancy facilities to ensure long term security operation has a great significance. With an emphasis upon mechanical properties and surface morphology coatings comparing before after aging by means the artificial accelerated xenon arc lamp(AAXAL) scanning electron microscope(SEM) this paper. Besides, dry-wet circulation resistance performance wre analyzed through experiment. It is shown that tensile...
The deterioration of coated concrete subjected to co-action freeze-thaw cycles-NaCl solution immersion double factors exposure was investigated in this study. Adhesion, chloride content and resistance ion diffusivity two types polyaspartic ester polyurea were analyzed. Test results showed that the adhesion QF-1 (PAE-b-H 12 MDI prepolymer H66) QF-2 H62) reduced about 5% respectively which kept excellent under after 200, 300 days 25, 50 times cycles. degradation process simultaneously exposed...
This paper presents a failure probability assessment of compressive contact connectors due to tin whiskers caused leads bridging. Based on scanning electron microscope measurements, we establish distributions four involved variables: whisker length, orientation, origin location, and counts. A model is developed used calculate the in terms two types definition: 1) national electronics manufacturing initiative (NEMI) acceptance criteria, 2) bridging by whiskers. Results indicate that, NEMI...
Two types of polyurea coatings based on polyaspartic esters (PAE) (PAE-F1 and PAE-F2) were exposed in salt fog environments outdoor for different time periods. The aging behaviors two evaluated by using electronic tensile testing machine, glossmeter Fourier transform infrared spectroscopy (FTIR). results showed that the had a significant effect gloss loss, hydrogen-bonded urea carbonyl PAE-F1 PAE-F2 77.1% 74.9% respectively obtained from FTIR analysis. index strength change rate elongation...
Investigating floating cells along a narrow microchannel (e.g., blood vessel) for their transiting speeds and the corresponding roles of cell physical properties can deepen our understanding circulating tumor (CTCs) metastasis via vessels. Many existing studies focus on process in vessel-like microchannels; further analytical are desired to summarize behaviors movement under different conditions. In this work, we perform theoretical analysis establish relation between speed key properties....
Cellular blebbing has been widely recognized as a hallmark of processes such apoptosis and cell migration. Here, we developed novel double-layer compression microfluidic device to trigger the enforced cells in programmable manner. It was found that critical for inducing membrane bleb highly invasive or drug-resistant breast lung cancer lines could be several times higher than their non-invasive drug-sensitive counterparts. Furthermore, showed knockdown annexin-6, protein known heavily...
Abstract Introduction: Accumulating evidence supports the tight correlation between physical characteristics of cells (including morphology, mechanical, and electrical properties) with progression cancer. Cellular blebbing, a distinctive feature observed during apoptosis cell migration, has gained significant recognition. However, existing tools such as atomic force microscopy optical tweezers have limitations in terms throughput complexity. Microfluidics emerged promising technology to...
- Electrochemical impedance spectroscopy (EIS) was used to study the thickness and curing temperature influence on aging behavior of polyaspartic ester (PAE) polyurea under salt fog exposure in this paper. The result has demonstrated that coating had great PAE-t-HDI prepolymer-D2000H65 aliphatic (T3). low frequency after 1day increased from 5.31×1010Ω·cm 7.96×1010Ω while 40μm 200μm, 200μm 7.42×1010Ω·cm2 high 200 days exposure. by 0.83×1010 Ω·cm2 0.39×109Ω·cm2 respectively, were 60°C 80°C....