نتایج جستجو برای: modified nano polyacrylonitrile fiber

تعداد نتایج: 425676  

Journal: :journal of chemical health risks 0
a. moghimi department of chemistry, varamin (pishva) branch , islamic azad university, varamin, iran h. mosalai department of chemistry, mahshahr branch, islamic azad university, mahshahr, iran h. hashemi moghadam department of chemistry, damghan branch, islamic azad university, damghan, iran

a simple method has been developed for the preconcentration of copper(ii) based on the adsorption of its modified nano polyacrylonitrile fiber. modified nano polyacrylonitrile fiber (panf) was prepared by adding of acrylic fibers to msethanolamine (mma) with different concentration solutions. the stability of a chemically modified nano polyacrylonitrile fiber especially in concentrated hydrochl...

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Journal: :international journal of bio-inorganic hybrid nanomaterials 0

a new simple and reliable method for rapid and selective extraction and determination of trace levels of zn(ii) ion is developed. zn(ii) ions are adsorbed quantitatively during passage of aqueous samples through pet-aa/aam nano fiber modified. almost all matrix elements were found to pass through the nano fiber to drain. modified poly (ethylene terephthalate)-grafted-acrylic acid/acryl amide na...

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Journal: International Journal of Bio-Inorganic Hybrid Nanomaterials 2012

A new simple and reliable method for rapid and selective extraction and determination of trace levels of Zn(II) ion is developed. Zn(II) ions are adsorbed quantitatively during passage of aqueous samples through PET-AA/AAm nano fiber modified. Almost all matrix elements were found to pass through the nano fiber to drain. Modified Poly (ethylene terephthalate)-grafted-Acrylic acid/Acryl amide Na...

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Journal: International Journal of Bio-Inorganic Hybrid Nanomaterials 2012

A new simple and reliable method for rapid and selective extraction and determination of trace levels of Zn(II) ion is developed. Zn(II) ions are adsorbed quantitatively during passage of aqueous samples through PET-AA/AAm nano fiber modified. Almost all matrix elements were found to pass through the nano fiber to drain. Modified Poly (ethylene terephthalate)-grafted-Acrylic acid/Acryl amide Na...

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Journal: :E-Journal of Chemistry 2011

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پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی 1393
تارا عاقبتی, مرجان عباسی, مهدی نوری,

asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...

ژورنال: علمی شیلات ایران 2020
Darabitabar, Fatemeh, Hedayati, Aliakbar, Yavari, Vahid, Yousefi, Hossein, Zakeri, Mohammad,

The aim of this study was to evaluate the performance of plant nano-gels as a new adsorbent and to remove nitrite at low cost. At first, plant nano-gels (nano bagasse, chitosan-functionalized nano-fiber and lignocellulose nano-fiber) were prepared by mechanical and top-down mechanism. Batch system medium was designed to measure the adsorbent optimum. Then isotherm and synthetic were calculated ...

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2001
RUIXIA LIU YI LI HONGXIAO TANG

Two types of chelating fibers containing an imidazoline or thioamide group were prepared through the functionalization of hydrazine-modified polyacrylonitrile fiber by ethylenediamine and through the amination and sulfurization reaction of the hydrazine-modified polyacrylonitrile fiber under appropriate conditions, respectively. It is shown that the reaction temperature, time, and agent concent...

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2017
Yazhen Wang Yutao Di Shaobo Dong Zijian He Xueze Zhang Jia Shi Tianyu Lan

(3-(tert-butylperoxy)propyl) trimethoxysilane (TBPT), is a tailor-made new style silane coupling agent with peroxide group, which have ability of initiating polymerization. This study used TBPT to generate free radical, and initiated the polymerization of acrylonitrile (AN), thereby forming polyacrylonitrile (PAN) in two approaches, thermal initiation system and redox initiation system. Meanwhi...

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Journal: :Analytical and bioanalytical chemistry 2002
Bei Wen Xiao-Quan Shan

A modified synthetic method has been developed for immobilization of 8-hydroxyquinoline on polyacrylonitrile fiber. The synthetic conditions, e.g. reagent concentration, reaction temperature and time, were optimized. The features of the newly-modified fiber are higher exchange capacity compared with most other materials containing immobilized 8-hydroxyquinoline, better mechanic characteristics,...

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