نتایج جستجو برای: غشای pvdf

تعداد نتایج: 4219  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده برق 1393

ماده pvdf با سه ترکیب مختلف pvdf، pvdf+go، pvdf+meh-ppv ساخته شد، و برای ایجاد خاصیت پایروالکتریکی که آشکارساری مادون قرمز بر مبنای این ویژگی قرار داده شده است، فاز بتا از ماده ساخته شد و در نهایت برای جلوگیری از متخلخل شدن لایه، تحت ترمیم حرارتی قرار گرفت و به منظور تعیین درصد فاز ? در ماده، از ماده تست ftir گرفته شد که بر اساس رابطه بیر-لامبرت، مقدار فاز بتا در سه ماده مشخص شدخاصیت فروالکتریک...

2016
Naohiro Terasawa

The electrochemical and electromechanical properties of actuators based on an ionic fluoropolymer (NafionTM) and non-ionic fluoropolymer (poly(vinylidene fluoride-co-hexafluoropropylene) [PVdF(HFP)]) gel fabricated using a single-walled carbon nanotube (SWCNT) – an ionic liquid (IL) gel electrode, were compared with those of actuators based on a non-ionic fluoropolymer (PVdF(HFP)). The ionic co...

2013
Roopa G. Manjunatha Konandur Rajanna Roy D. Mahapatra Srinivas Dorasala

Noninvasive objective evaluation of nasal airflow is one of the important clinical aspects. The developed polyvinylidene fluoride (PVDF) sensor enables measurement of airflow through each side of the nose using its piezoelectric property. This study was designed to evaluate the diagnostic capability of the PVDF sensor in assessing the deviated nasal septum (DNS). PVDF nasal sensor uses its piez...

ژورنال: پژوهش نفت 2019

در این پژوهش غشای ترکیبی نانوفیلتراسیون بر پایه‌ پلی‎اتر‎سولفون (PES)/ پلی‌وینیلیدن‌فلوراید (PVDF) به‎روش وارونگی فازی تهیه گردید. از آنجا که پلیمر‌پلی‌وینیلیدن‌فلوراید نسبت به سایر پلیمرها دارای خاصیت پیزوالکتریکی بالایی بوده  می‎تواند در ترکیب با سایر پلیمر‎ها منجر به تولید غشاهایی با ساختاری متفاوت و مقاوم در برابر گرفتگی گردد که قابلیت کاربرد در تصفیه پساب صنایع مختلف را دارا است. اثر افزود...

2008
Michael Q. Tran Milo S. P. Shaffer Alexander Bismarck

Aprocedure for the production of carbon nanotube (CNT) reinforced poly(vinylidine difluoride) (PVDF) powders has been developed. These powders are versatile precursors for a range of nanocomposite materials. The morphology of the CNT/PVDF powder can be related to the interaction between filler and matrix, which depends on the degree of modification of the polymer with grafted maleic anhydride (...

2013
Li Li Tian Ye

The polyvinylidene fluoride (PVDF)/Fe 3+ -TiO2 catalytic membrane was prepared by sol-gel method. It was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-IR spectrum (FT-IR), mechanics capability, water flux, pepsin retention, porosity and contact angle etc. The catalytic activity of PVDF/Fe 3+ -TiO2 catalytic membrane was evaluated by the degradation of refracto...

Journal: :Journal of biomedical materials research. Part A 2015
Jenita Pärssinen Henrik Hammarén Rolle Rahikainen Vitor Sencadas Clarisse Ribeiro Sari Vanhatupa Susanna Miettinen Senentxu Lanceros-Méndez Vesa P Hytönen

Poly(vinylidene fluoride) (PVDF) is a biocompatible material with excellent electroactive properties. Nonelectroactive α-PVDF and electroactive β-PVDF were used to investigate the substrate polarization and polarity influence on the focal adhesion (FA) size and number as well as on human adipose stem cells (hASCs) differentiation. hASCs were cultured on different PVDF surfaces adsorbed with fib...

Journal: :Water research 2014
Chi Yan Lai Andrew Groth Stephen Gray Mikel Duke

Membranes with more resilience to abrasive wear are highly desired in water treatment, especially for seawater desalination. Nanocomposite poly(vinylidene fluoride) (PVDF)/nanoclay membranes were prepared by phase inversion and then tested for abrasion resistance. Their material properties were characterized using Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA),...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2011
Vitor Sencadas Pedro Martins Alexandre Pitães Maria Benelmekki José Luis Gómez Ribelles Senentxu Lanceros-Mendez

This work reports on the nucleation of the β-phase of poly(vinylidene fluoride) (PVDF) by incorporating CoFe(2)O(4) and NiFe(2)O(4) nanoparticles, leading in this way to the preparation of magnetoelectric composites. The fraction of filler nanoparticles needed to produce the same β- to α-phase ratio in crystallized PVDF is 1 order of magnitude lower in the cobalt ferrite nanoparticles. The inte...

Journal: :Nanotechnology 2010
Tae-Gyung Kim Dhanusuraman Ragupathy Anantha Iyengar Gopalan Kwang-Pill Lee

Electrospinning was employed to prepare new multi-functional nanowebs. Cyclodextrin based inclusion complex (CD-IC) was used to disperse multiwalled carbon nanotubes (MWNT) within electrospun polyvinylidene fluoride nanofibrous membranes (PVdF-NFM). Subsequently, MWNT(CD-IC)/PVdF-NFM was loaded with gold (Au) particles. The morphology, structure and thermal properties of Au/MWNT(CD-IC)/PVdF-NFM...

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