توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Thermoregulated non–woven fabric treated with microencapsulated phase change materials suitable for smart textiles
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
The objective of this study is to manufacture a thermoregulating non–woven fabric based on melamine–formaldehyde (MF) microcapsules. Microencapsulated phase change materials (mPCMs), containing n–hexadecane (HD) was prepared via dispersion polymerization and consequence microcapsules was incorporated into non–woven fabric through screen coating process. Morphology of the microcapsules, formation of the core–shell structure and distribution of microcapsules deposited on fabric, were investigated by scanning electron microscopy (SEM) technique, also that was used to determine particle size and its distribution and it was found that average mean diameter of microcapsules was 3.78 micron. Thermal properties of microcapsules were studied by differential scanning calorimetry (DSC) and thermal gravimetry analysis (TGA) and these thermograms confirmed the extent of inclusion of HD in the MF microcasules and their corresponding properties. This research was conducted to clarify the influence of the amount of microcapsules and binder on the thermal response infrared thermo–camera (IRT) analyses. The results reveal that thermo–regulating response depends on the surface deposited weight and the mass ratio binder to microcapsules. A weight ratio binder to microcapsules taken between 1:2 and 1:4 is suitable to manufacture thermo–regulating textile<\div>

۲Preparation and characterization of polyurethane foam treated with phase change material microcapsules as potential thermo–regulating textiles
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۴
Polyurethane (PU) foam is a very attractive material for applications involving industries ranging from that of technical clothes to fashion. Microencapsulated Phase Change Materials (mPCMs) can be used onto foam using a polymer binder and extender or in–situ foam manufacturing by mixing diols and isocynates to add the thermoregulating properties demanded by modern consumers. The use of microcapsules enhances the thermal response of the foam during heating or cooling and the degree of thermal sensitivity depends on the percentage of microcapsules added in the foam. In this study two type of PU foam are prepared using dip coating and in–situ foam manufacturing method to evaluate thermal performance of them. In the dipcoating method micrcapsules is treated on the surface of foam whereas in case of in–situ foam manufaturing microcapsules are evenly inserted inside the foam. Scanning electron microscopy (SEM) used to observe the dispersion of the microcapsules and surface morphology in foam structure. The results revealed that dip coated foam had a higher thermoregulating properties but in–situ manufactured one had higher durability and an adequate stability after washing, rub fastness and ironing treatments. The dip–coated layer was applied for tailoring clothes and tested by using temperature and humidity sensors. The results showed that cloth sample with mPCMs have great ifluence on reduce humidity and Temperature<\div>

۳An Advance Modeling and Control Strategy for a Real Freeway
اطلاعات انتشار: دوازدهمین کنفرانس مهندسی حمل و نقل و ترافیک ایران، سال
تعداد صفحات: ۱۵
In this paper an advance modeling and control strategy for a real freeway a based on neural networks and model predictive control is proposed. Because of the nonlinearity of freeway traffic flow, neural network is a promising method for modeling of this system. However, as the freeway length is increased, complexity and dimension of the neural network models will increase. It is shown that by using principal component analysis, the network dimension can be decreased while the accuracy of the models will be reasonably preserved. Then, the simplified neural network can be used within an MPC framework for ramp metering control within a wider area. The approach is then evaluated based on some collected real data from a freeway in USA. The simulation results demonstrate that the proposed approach can alleviate traffic congestion and improve efficiency of the freeway.<\div>

۴Experimental Study of the Thermo–Regulating Property of Clothing Systems Contained Different Melting Point Microencapsulated PCMs
اطلاعات انتشار: Journal of Textiles and Polymers، سوم،شماره۱، JAN ۲۰۱۵، سال
تعداد صفحات: ۵
This study has been carried out in order to investigate the effects of type of phase change materials on the thermo–regulating performance of clothing. Three systems of clothing with the same construction are chosen and their effects on the temperature response of the body (skin temperature changes) during the activity under a defined scenario are investigated. One of the clothing systems is normal (without PCM, i.e. phase change material), the other one is incorporated with PCM with a melting point of 18°C and the third one is incorporated with PCM with a melting point of 28°C. The skin temperature which is mainly affected by the physiological response of the human body is recorded by an on–line measuring system in the field room. Experimental results showed that PCM can affect the thermo–regulating performance of clothing. Furthermore, PCM with a melting point of 28°C shows a more significant effect than PCM with a melting point of 18°C. On the other hand, under cold environmental conditions (–5°C) and during activity of body, PCM with a melting point of 28°C decreases the fluctuations of temperature more than PCM with a melting point of 18°C. Finally, results of this research show that the type of PCM affects the skin temperature of the body. By this method, it is possible to design smart protective clothes with desired level of comfort.
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