http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ying Dan Liu,김민수,최형진,유천열 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.9
Magnetorheological (MR) fluid is a smart magnetic particle suspension with the ability of being transformed from a liquid-like to a solid-like state by the stimuli of magnetic field. However, in the absence of magnetic field, dispersed magnetic particles of high density are apt to settle, resulting in poor dispersion stability. In this study, we introduced an aqueous poly(ethylene oxide) (PEO) solution with controlled shear viscosity as a medium fluid for carbonyl iron based MR fluid. Its rheological and dispersion properties were studied by varying molecular weight of the PEO. Field dependence of its MR properties was observed by a rotational rheometer with the attached MR device.
Liu, Ying Dan,Quan, Xuemei,Hwang, Bora,Kwon, Yong Ku,Choi, Hyoung Jin American Chemical Society 2014 Langmuir Vol.30 No.7
<P>Monodisperse core–shell-structured poly(styrene-<I>co</I>-butyl acrylate-<I>co</I>-[2-(methacryloxy)ethyl] trimethylammonium chloride)/silica (PSBM/SiO<SUB>2</SUB>) nanoparticles were applied as new electrorheological (ER) materials in which the particles were dispersed in an insulating oil. These nanoparticles were prepared by the consecutive precipitation of cetyltrimethylammonium bromide and negatively charged tetraethylorthosilicate onto the cationic surfaces of PSBM colloidal particles. The successful deposition of the shell phase of the particles and their morphology was examined by transmission and scanning electron microscopy. Their ER properties were studied with a rotational rheometer under different shear modes: controlled shear rate, steady shear under constant shear rate, and creep test. The silica shell allowed the PSBM/SiO<SUB>2</SUB> particles to exhibit typical ER performance under an applied electric field. The dielectric spectra of the PSBM/SiO<SUB>2</SUB>-based ER fluid were also recorded using an LCR meter, which was correlated to the ER performance of the ER fluid.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2014/langd5.2014.30.issue-7/la4050072/production/images/medium/la-2013-050072_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la4050072'>ACS Electronic Supporting Info</A></P>
Novel electrorheological properties of a metal–organic framework Cu<sub>3</sub>(BTC)<sub>2</sub>
Liu, Ying Dan,Kim, Jun,Ahn, Wha-Seung,Choi, Hyoung Jin The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.45
<P>A metal–organic framework, Cu<SUB>3</SUB>(BTC)<SUB>2</SUB>, was synthesized and applied as an electro-responsive electrorheological material dispersed in insulating oil. Powder of crystalline Cu<SUB>3</SUB>(BTC)<SUB>2</SUB> exhibited excellent chain-like structures and controllable rheological properties in an applied electric field.</P> <P>Graphic Abstract</P><P>A metal–organic framework, Cu<SUB>3</SUB>(BTC)<SUB>2</SUB>, was synthesized and applied as an electro-responsive electrorheological material dispersed in insulating oil. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc30367a'> </P>
Liu Ying,Zhang Xin,Zhang Li,Oliver Brian G,Wang Hong Guang,Liu Zhi Peng,Chen Zhi Hong,Wood Lisa,Hsu Alan Chen-Yu,Xie Min,McDonald Vanessa,Wan Hua Jing,Luo Feng Ming,Liu Dan,Li Wei Min,Wang Gang 대한천식알레르기학회 2022 Allergy, Asthma & Immunology Research Vol.14 No.4
Purpose: The molecular links between metabolism and inflammation that drive different inflammatory phenotypes in asthma are poorly understood. We aimed to identify the metabolic signatures and underlying molecular pathways of different inflammatory asthma phenotypes. Methods: In the discovery set (n = 119), untargeted ultra-high-performance liquid chromatography-mass spectrometry (UHPLC-MS) was applied to characterize the induced sputum metabolic profiles of asthmatic patients with different inflammatory phenotypes using orthogonal partial least-squares discriminant analysis (OPLS-DA), and pathway topology enrichment analysis. In the validation set (n = 114), differential metabolites were selected to perform targeted quantification. Correlations between targeted metabolites and clinical indices in asthmatic patients were analyzed. Logistic and negative binomial regression models were established to assess the association between metabolites and severe asthma exacerbations. Results: Seventy-seven differential metabolites were identified in the discovery set. Pathway topology analysis uncovered that histidine metabolism, glycerophospholipid metabolism, nicotinate and nicotinamide metabolism, linoleic acid metabolism as well as phenylalanine, tyrosine and tryptophan biosynthesis were involved in the pathogenesis of different asthma phenotypes. In the validation set, 24 targeted quantification metabolites were significantly expressed between asthma inflammatory phenotypes. Finally, adenosine 5′-monophosphate (adjusted relative risk [adj RR] = 1.000; 95% confidence interval [CI] = 1.000–1.000; P = 0.050), allantoin (adj RR = 1.000; 95% CI = 1.000–1.000; P = 0.043) and nicotinamide (adj RR = 1.001; 95% CI = 1.000–1.002; P = 0.021) were demonstrated to predict severe asthma exacerbation rates. Conclusions: Different inflammatory asthma phenotypes have specific metabolic profiles in induced sputum. The potential metabolic signatures may identify therapeutic targets in different inflammatory asthma phenotypes.
Ying Dan Liu,Fei Fei Fang,최형진 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.4
We comment on the recently published dielectric properties of titanate nanotubes (TNTs)- and titania nanoparticles (P25)-based electrorheological (ER) fluids in this note aiming to make a better understanding of their ER performance. Based on our Cole–Cole model plot, it is found that we can fit the dielectric spectra (dielectric constant/dielectric loss vs. frequency) of two ER fluids well with a better explanation of their polarizability by differentiating their ER performance.
Polymeric Colloidal Magnetic Composite Microspheres and Their Magneto-Responsive Characteristics
Ying Dan Liu,최형진,홍성해 한국고분자학회 2012 Macromolecular Research Vol.20 No.12
This feature article reviews recent research on the fabrication of magnetic polymeric composite particles as well as their special applications as magnetorheological (MR) fluids. MR materials are a class of smart particles that can form chain-like structures when dispersed in a non-magnetic medium under an applied magnetic field. A range of methodologies for their fabrication, such as in situ polymerization and solvent casting, have been introduced to prepare micron-sized magnetic composite particles with polymers followed by a demonstration of their corresponding morphologies as well as their magnetic and MR properties. Both the magnetic properties of the particle and the MR performance of the MR fluid are strongly influenced by the incorporation of polymers including the synthesis method and mass ratio.