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Register a new userStudying the possibility of producing carbon nanofibers using electrospinning technology
دراسة إمكانية إنتاج ألياف كربون نانوية باستخدام تقنية الغزل الكهربائي
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Aِl-Baath University رسالة ماجستير
Publication date
2019
and research's language is
العربية
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لقد استخدمنا في هذا البحث تقنية الغزل الكهربائي للحصول على شبكات لا منسوجة من الألياف النانوية من بولي أكريل نتريل حيث قمنا بإذابة البولي أكريل نتريل في مذيبه ثنائي ميتيل الفورم أميد لتشكيل المحلول البوليميري .
In this paper, we have used electrospinning technique to obtain nonwoven networks of nanofibers from polyacrylic nitrile, where we dissolved polyacryl nitrile in its dimethylformamide solvent to form the polymeric solution.
References used
غزل طهماز : رسالة ماجستير بعنوان " دراسة إمكانية تطوير جهاز غزل كهربائي"
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In this study we used electro spinning technology to obtain
nonwoven webs of Nano fibers of poly vinyl alcohol and Nano
particles of silver . we dissolve the polymer poly vinyl alcohol in
it's solvent (water) to form a polymeric solution that we c
harged it
by positive charge and ejected it to leaving it on a collector that
we charged it by negative charge and used a high voltage. and
we mixed the polymer poly vinyl alcohol with silver nitrate with
different concentrations and electro spinning the mixture to obtain
Nano fibers and Nano particles of silver then we applied heat
treatment for the whole samples at 155°c for 5 minutes for tow
aims the first one is to make crosslinking between series of PVA
and the second is for the stability of silver nanoparticles , finally
we analyze samples on Scanning Electron Microscopy SEM .
This research was carried during the period of (2010-2013) to study the possibility of benefiting from the raw seaweeds residuse accumulated on the Syrian beach in obtaining an alternative substrates instead of the traditional one for using in
nurseries, especially forestry, and thus reducing the peat moss importation and saving the currency, at the same time salvation the environment from the organic plant waste and and improve the seashores appearance .
The use of GPS readings has led to a real revolution in Geodesic sciences and their applications. Now, the possibility of replacing the conventional methods used in measuring elevations by using GPS technology which is a good method to get the 3D poi
nts providing that the GPS measures the helical elevations. In order to measure the Physically important elevations such as the ortho-metric elevation, there must be an accurate specimen that gives the Geoids of the helix ( Geoids separation ) .In some parts of the world ( as in the case of our study ), there are only universal Ganoids .Those ganoids are calculated as series to reach a certain defined degree.
The difference in the elevation ref. surfaces and the surface of the global geoids affects the optimized elevation of the GPS, but if we deal in this paper with the deviations in elevations, there will be no problem . The importance of this paper starts here , as we can get the possibility of taking the deviations in elevations by using The GPS tech that does not exceed /500m/ distance along with improving the results by using EGM2008 model. The results of the deviations in elevation taken by GPS, the Universal Geoids specimen /EGM 2008 / the direct engineering and triangular settlements, will be compared so that we reach some recommendations that increase accuracy in work and save time and efforts.
This research aimed to study the possibility of using a digital
camera in estimating soil color and compare it with Munsell soil
color chart, and then study the correlation between soil color as
important classification properties and soil content of organic
matter, soil content of total carbonate and soil Texture.
Nylon-6/6 continuous Polymer nanofibers (NF) were produced by using conventional single needle
electrosprinng (ES) technique. In this paper several parameters, such as applied voltage and needle
diameter were investigated to optimize fiber morpholo
gy. The morphological and structure properties of
the fiber (average diameter, height, length, surface roughness and fiber shape) are visualized by Atomic
Force Microscopy (AFM). Good alignment of polymer nanofibres was confirmed by AFM and optical
microscopy observations. We concluded that fiber diameter increases with decreasing applied voltage
intensity and increasing the distance between the electrodes.
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