دانلود رایگان مقاله لاتین الکترورئولوژیکال اکسید تیتانیوم ناهمسانگرد از سایت الزویر
عنوان فارسی مقاله:
آماده سازی و رفتار الکترورئولوژیکال, اکسید تیتانیوم ناهمسانگرد / هسته پلی آنیلین / نانوکامپوزیت پوسته
عنوان انگلیسی مقاله:
Preparation and electrorheological behavior of anisotropic titanium oxide/polyaniline core/shell nanocomposite
سال انتشار : 2016
برای دانلود رایگان مقاله الکترورئولوژیکال اکسید تیتانیوم ناهمسانگرد اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
The electrorheological (ER) fluid is a kind of intelligent materials whose rheological characters can be changed reversibly according to the external applied electric field [1e14]. An electrorheological system mostly composed of solid particles, and insulating carrier medium. The solid particles can be metallic oxide, inorganic, organic, and organic/inorganic composites [15e19]. For a variety of materials which used for ER solid particles, the electrical conductivity is a key parameter that needs to be satisfied with the semiconducting. In order to meet the conditions, researchers prepared many composites. The reason for that is because the electrical conductivity of composites is much more controllable than single material. Generally, the whole ER system is colloids, suspensions, and emulsions. Because of this nature of the ER fluid, make it has the application in varied control equipments, such as dampers and actuators controlled. But, ER system have several limitations such as easily electrical breakdown at high electrical field, low stability, and low shear strength, which largely restrict it's industry application [20e24]. To overcome these limitations, various types of materials have been introduced as ER dispersed materials. For instance, polymer/inorganic composite were used because of their high polarization ability attributed to the difference in chemical and physical structure. At present, Titanium dioxide (TiO2) has been becomes one of the most extensively researched semiconducting materials. Titanium oxide has many peculiar properties such as a wide band gap of 3.2 eV, low cost, chemical stability, etc. [25]. It also can be used in many fields, especially in photo catalysis, lithium-ion batteries, and solar energy [26]. As we all known, there is a great relationship between material performance and its morphology and structure. So, many people have done many words to synthesis novel structures of TiO2. Recently, the research focuses on the onedimensional nanotube and nanowire, two-dimensional nanosheets, hierarchical structures, hollow or porous structure, etc. [27e29] Among the conducting polymers, polyaniline (PANI) have a good prospect because it possess a lot of advantages, such as cheap raw materials, simple synthesis processes, controllable conductivity, good environmental stability and process ability. At present,soft or hard templates were used to achieve PANI nanostructure. The combination of high dielectric TiO2 and good conductive PANI with complex structure may provide high ER activity and application. In addition, core-shell particles are an interesting design for ER materials, especially for better ER performance. Considering the dielectric TiO2 and conducting polymers, the dielectric effects of core particles can be combined with the electrical properties of conducting shell layers. Therefore, anisotropic structured particles may provide high dielectric response, which is beneficial to the enhancement of ER activity. So, in this work, we prepared a kind composite that is made up of conducting polymers-PANI and semiconducting inorganic oxide-TiO2, which also combine the advantage of core-shell and anisotropic structure. The prepared anisotropic TiO2/polyaniline core/shell particles were dispersed in silicone oil and their electro-responsive ER properties were tested at various electric field strengths.
برای دانلود رایگان مقاله الکترورئولوژیکال اکسید تیتانیوم ناهمسانگرد اینجا کلیک نمایید.
کلمات کلیدی:
Electrorheology of Graphene Oxide - ACS Applied Materials ... pubs.acs.org/doi/abs/10.1021/am300267f by WL Zhang - 2012 - Cited by 58 - Related articles Apr 4, 2012 - Novel polarizable graphene oxide (GO) particles with oxidized groups on .... Preparation and electrorheological behavior of anisotropic titanium ... Negative Electrorheological Behavior in Suspensions of Inorganic ... pubs.acs.org/doi/abs/10.1021/la1029036 by MM Ramos-Tejada - 2010 - Cited by 18 - Related articles Oct 12, 2010 - Preparation and electrorheological behavior of anisotropic titanium ... titanium oxide microspheres and its smart electrorheological activity. NPG Asia Materials - Giant electrorheological fluids with ultrahigh ... www.nature.com › Journal home › Current issue › November 04 2016 Nov 4, 2016 - Electrorheological (ER) fluids, which exhibit flow behavior and rheological ... However, the suspensions of the anisotropic nanoparticles still possess ..... of suspensions of hollow globular titanium oxide/polypyrrole particles. Guided self-assembly of nanostructured titanium oxide - IOPscience iopscience.iop.org/article/10.1088/0957-4484/23/27/279502/pdf by B Wang - 2012 - Cited by 23 - Related articles Jun 19, 2012 - Guided self-assembly of nanostructured titanium oxide. View the table of contents for this issue, or go ... electrorheological chain structures or aligned particles with ... the variation of anisotropic behavior between the different. Electrorheology of nanofiber suspensions - NCBI - NIH https://www.ncbi.nlm.nih.gov › NCBI › Literature › PubMed Central (PMC) by J Yin - 2011 - Cited by 43 - Related articles Mar 25, 2011 - Our goal is to highlight the advantages of using anisotropic .... fields, the ER behavior of titanate suspension was further measured under oscillatory ...... and electrorheological activity of modified titanium oxide nanoparticles. Quasi-Static Electrorheological Properties of Hematite/Silicone Oil ... acs.jce.ac.il/doi/abs/10.1021/la0501583 The results show that unelectrified suspensions behave essentially as fluids, ... and electrorheological behavior of anisotropic titanium oxide/polyaniline ...
