نتایج جستجو برای: chemical polymerization

تعداد نتایج: 405925  

In this article, preparation of polypyrrole and its nanocomposites as adsorbents werediscussed and the capability of separation of copper ions from aqueous solution were studied.Polypyrrole was prepared by chemical oxidative polymerization method of pyrrole usingFeCl3 as an oxidant. The removal of Cu (II) was investigated using PPy, PPy/TiO2 andPPy/TiO2/DHSNa nanocomposites. The products were i...

2017
Lin Yang Congjia Xie Yizhou Li Lei Guo Minfang Nie Jinping Zhang Zhiying Yan Jiaqiang Wang

The use of metal-organic frameworks (MOFs) in the polymerization field remains comparatively rare up to now, let alone studies on the fabrication of polymer microstructures through a MOFs-catalyzed assembly process. Zeolitic imidazolate framework-8 (ZIF-8), a well-known MOF for its chemical and thermal stabilities, was used to induce a polymerization reaction of saturated alkylsilanes for the f...

R. Sariri

Hydrogels are introduced to modem medicine as novel materials suitable for a variety ofbiomedical applications. Studying hydrogels as novel biomaterials has become a fast-developingand exciting research field during the last two decades. These interesting biomaterials have found awide range of application including contact lenses, vehicles for drug delivery and scaffold in tissueengineering and...

Polyaniline (PANI) nanocomposite has been successfully prepared in aqueousmedia by the chemical polymerization of aniline with ammonium peroxydisulphateas an initiator in the presence of a steric stabilizer such as sodium dodecylbenzenesulfonate(DBSNa), Poly(vinyl pyrrolidone) (PVP), poly(vinyl alcohol)(PVA), poly(ethylene glycol) (PEG) and hydroxypropylcellulose (HPC). Thechemical structure, m...

ژورنال: مجله دندانپزشکی 1999
بیک, فریبا , عطایی, محمد , قوام, مریم ,

Indirect esthetic restorations have recently gained popularity, and choosing suitable cement is an important concern in this regard. A wide variety of resin cements with different curing models:(chemical, light, dual), have been introduced to the profession, and among them the dual systems are claimed to be able to continue polymerization after stopping the light. In order to study and compare ...

H. Banimahd keivani M. Banimahd keivani M. Darvishpour M. H. Fekri

In this research, the removal of malachite green dye from Textile Wastewaters using polyaniline coated onto sawdust (PAni/SD) has been investigated. Ammonium peroxodisulphate was used as chemical oxidant for polymerization of polyaniline directly on the surface of sawdust. The effects of some important parameters such as pH, initial concentration, sorbent dosage, exposure time and temperature o...

H. Aghaie K. Zare M. Banimahd Keivani R. Ansari

This paper deals with application of polyaniline coated on wood sawdust for removal ofmethylene blue (MB) dye from aqueous solutions. Polyaniline coated onto sawdust (termedas PAn/SD) was prepared via direct chemical polymerization onto sawdust which waspreviously soaked in the monomer (aniline) solution in acidic (HC1) media. Adsorptionexperiments were carried out using batch system. The effec...

2009
Jung-Min Lee Shin-Jae Kang

The monodisperse and controlled polymer nanoparticles have attracted much attention in academic and industrial fields. Due to small size and extremely large specific surface area, nanoparticles could be used to the fields of drug delivery system, microencapsulation, chromate graphy, catalyst, organic/inorganic hybrid materials, and templates for porous inorganic materials. The dispersion polyme...

Journal: :Chemical communications 2012
Meng-Yu Tsai Ching-Yu Lin Chi-Hui Huang Jiun-An Gu Sheng-Tung Huang Jiashing Yu Hsien-Yeh Chen

Chemical vapor deposition polymerization was used to deposit a novel maleimide-functionalized poly-p-xylylene coating on various substrates. The coated substrates are readily able to undergo thiol-maleimide click reaction under mild conditions. Applications using this coating technology are highlighted in low-protein-fouling modification as well as manipulated attachments and growth of bovine a...

Journal: :The Analyst 2011
Jingqi Tian Yingwei Zhang Yonglan Luo Hailong Li Junfeng Zhai Xuping Sun

In this Communication, we report on the first preparation of conjugation polymer poly(2,3-diaminonaphthalene) (PDAN) microspheres via chemical oxidation polymerization of 2,3-diaminonaphthalene (DAN) monomers by ammonium persulfate (APS) at room temperature. We further demonstrate the use of PDAN microspheres as a novel quencher for fluorescence-enhanced nucleic acid detection.

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