排序方式: 共有7条查询结果,搜索用时 31 毫秒
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In this paper, we present a fixed point method to prove generalized Hyers–Ulam stability of derivations in modular spaces. 相似文献
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Shirgholami MA Khalil-Abad MS Khajavi R Yazdanshenas ME 《Journal of colloid and interface science》2011,359(2):530-535
Superhydrophobic cotton textiles are prepared by a simple, one-step and inexpensive phase separation method under ambient conditions by which a layer of polymethylsilsesquioxane (PMSQ) nanostructures is covered onto the cellulose fibers. By changing the silane precursor concentration, PMSQ nanostructures with various shapes, morphologies and sizes were fabricated. Nanostructures were characterized using SEM, EDS, and attenuated total reflectance FTIR. The wettability of the modified cellulose surfaces was characterized with contact-angle goniometry and sliding angle technique, respectively. The water contact angle of modified cotton is measured to be higher than 150°, which is high enough to exhibit the lotus effect as a result of the superhydrophobicity. Tunable water-repellent properties of the fabric are also demonstrated, with sliding contact angles varying from "sticky" to "slippery" depending upon different nanostructures on the surface of the fibers. It is expected that this simple technique will accelerate the large-scale production of superhydrophobic cellulosic materials with new industrial applications. 相似文献
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Shirazi Milad Shateri Alireza Bayareh Morteza 《Journal of Thermal Analysis and Calorimetry》2018,133(2):1061-1073
Journal of Thermal Analysis and Calorimetry - In the present paper, mixed convection heat transfer of water–Al2O3 nanofluid in the space between two cylinders is investigated numerically. The... 相似文献
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M.GORJI M.ALIPANAH M.SHATERI E.FARNAD 《应用数学和力学(英文版)》2011,32(1):69-74
The laminar flow through a leaky tube is investigated, and the momentum and conservation of energy equations are solved analytically. By using the Hagen-Poiseuille velocity profile and defining unknown functions for the axial and radial velocity components, the pressure and mass transfer equations are obtained, and their profiles are plotted according to different parameters. The results indicate that the axial velocity, the radial velocity, the mass transfer parameter, and the pressure in the tube decrease as the fluid moves along the tube. 相似文献
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Mohammad Shateri Khalil-Abad Mohammad Esmail Yazdanshenas Mohammad Reza Nateghi 《Cellulose (London, England)》2009,16(6):1147-1157
Cotton was cationized by exhaustion method using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHPTAC) as a cation-generating
agent. Adsorption of silver nanoparticles on normal and cationized cotton was studied by exhaustion method at temperatures
of 80°C and 100°C. Two exhaustion baths were used, containing nanosilver colloidal solutions stabilized by two different stabilizers
and various concentrations of silver nanoparticles. Fourier-transform infrared (FT-IR) spectra of normal and cationized samples
confirmed the existence of quaternary ammonium groups on cationized cellulose fibers. X-ray diffraction (XRD) patterns showed
that crystallinity of the modified cellulose fibers was decreased. Scanning electron microscope (SEM) images revealed that
the surface of the modified cotton was rougher than that of normal cotton. In addition, SEM images showed the presence of
silver nanoparticles on the surface of treated fabric samples. The amount of silver particles adsorbed on the fabric samples
was determined using inductively coupled plasma-optical emission spectrometer. Antibacterial tests were performed against
Escherichia coli bacteria as an indication of antibacterial effect of samples. Cationized cotton samples adsorbed more silver nanoparticles
and then had greater ability to inhibit bacteria. 相似文献
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