نتایج جستجو برای: silica inorganic polymer

تعداد نتایج: 199691  

2005
Kazutoku Ohta

Ion chromatography (IC) developed by Small et al . [1] is widely recognized as a simple, powerful and convenient analytical technique for the determination of various low−molecular−weight ionic compounds [2, 3]. Firstly, IC with conductimetric detection (IC−CD) was mainly applied for the determination of inorganic anions. This is because a lightly sulfonated styrene−divinylbenzene co−polymer (S...

2011
Zongli Xie Derrick Ng Manh Hoang Tuan Duong Stephen Gray

Hybrid polymer-inorganic membranes were prepared by crosslinking poly(vinyl alcohol) (PVA), maleic acid (MA) and silica via an aqueous sol-gel route. Membrane characterisation results revealed silica nanoparticles (<10 nm) were well dispersed in the polymer matrix and significantly reduced swelling of the membrane. The membranes were tested for pervaporation separation of aqueous salt solution ...

Behrouz Heidari, Hossein Jiriaiee Maryam Ansari

At first step polymer optical fibers (POFs) are used in short distance for optical data transmissions. At second step SiO2 nanoparticles were prepared by sonochemical-assisted method. Silica nanoparticles were added to polymer matrix to prepare polymer based nanocomposites. Most of the POF applications are in the medical and electrical devices. There are several methods for fabrication of POFs,...

2013
Mostafa Yazdimamaghani Tannaz Pourvala Elaheh Motamedi Babak Fathi Daryoosh Vashaee Lobat Tayebi

Nanocomposites of encapsulated silica nanoparticles were prepared by in situ emulsion polymerization of acrylate monomers. The synthesized material showed good uniformity and dispersion of the inorganic components in the base polymer, which enhances the properties of the nanocomposite material. A nonionic surfactant with lower critical solution temperature (LCST) was used to encapsulate the sil...

2010
Shanghua Li Meng Meng Lin Muhammet S. Toprak Do Kyung Kim Mamoun Muhammed

This article provides an up-to-date review on nanocomposites composed of inorganic nanoparticles and the polymer matrix for optical and magnetic applications. Optical or magnetic characteristics can change upon the decrease of particle sizes to very small dimensions, which are, in general, of major interest in the area of nanocomposite materials. The use of inorganic nanoparticles into the poly...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2005
Woo-Sang Lee Toshifumi Takeuchi

Bisphenol A (BPA)-recognizing imprinted polymers were synthesized using a template immobilized on silica where the template was grafted to aminopropyl silica. The silica-template conjugate was co-polymerized with a cross-linker (ethylene glycol dimethacrylate) and a functional monomer (4-vinylpyridine or methacrylic acid). The synthesized silica-polymer composites were treated with an aqueous N...

2014
Matthew A. Hood Margherita Mari Rafael Muñoz-Espí

This article reviews the recent advances and challenges in the preparation of polymer/inorganic hybrid nanoparticles. We mainly focus on synthetic strategies, basing our classification on whether the inorganic and the polymer components have been formed in situ or ex situ, of the hybrid material. Accordingly, four types of strategies are identified and described, referring to recent examples: (...

Journal: :Advanced Healthcare Materials 2021

Inorganic–organic hybrid biomaterials made with star polymer poly(methyl methacrylate-co-3-(trimethoxysilyl)propyl methacrylate) and silica, which show promising mechanical properties, are 3D printed as bone substitutes for the first time, by direct ink writing of sol. Three different inorganic:organic ratios methacrylate)-star-SiO2 inks pore channels in range 100–200 µm. Mechanical properties ...

Journal: :Polymer International 2022

The advent of space exploration and high-speed civil transport has prompted the development polymeric materials that can endure extreme environments. Cyanate ester (CE) is a commonly used thermoset matrix for high-temperature applications in aerospace defense applications. CE high glass transition temperature (>200 °C), low moisture absorption, coefficient thermal expansion extremely thermally ...

رضازاد, محمود, علیزاده, محمد, مقدس‌کیا, احسان, وردست, محمدرضا,

Background &&nbsp;Aims: Nowadays usage of molecularly imprinted polymers which act as artificial antibodies and separate target molecules from biological environments is a novel approach. Cholesterol is one of the major risk factors of cardiovascular diseases and its precise determination is crucial. In this research, a molecularly imprinted polymer by means of Fe3O4 nanoparticles coated with s...

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