scholarly journals Synthesis, Characterization and USW Sensor of PEO/PMMA/PVP Doped with Zirconium Dioxide Nanoparticles

2021 ◽  
Author(s):  
Karar Abdali Obaid
Keyword(s):  
Polyethylene Oxide ◽  
Zirconium Dioxide ◽  
Raw Materials ◽  
Composite Films ◽  
Pressure Sensors ◽  
Optical Microscope ◽  
Vinyl Pyrrolidone ◽  
Casting Method ◽  
Ultrasound Waves ◽  
Zirconium Dioxide Nanoparticles

Abstract Piezoelectric phenomena is very important for various applications such as ultrasound waves (USW) sensor and pressure sensors. The raw materials from polyethylene oxide (PEO), Poly(methyl methacrylate)(PMMA) and poly(N-vinyl pyrrolidone) (PVP) polymer blends were doped with 0.02,0.04 and 0.06 wt% from zirconium dioxide (ZrO2) nanoparticles (NPs) as a nanocomposites (NCs). The resultant films were prepared by dry casting method. The optical microscope (OM) and scanning electron microscopy (SEM) were used to satisfied from the SiO2NPs diffusion in the blend. The SiO2NPs were good diffused inside the blend with some weak aggregation happened in the high content of NPs. The composite films were diagnosed by FTIR. The USW properties were measured for k1 spaceman with various frequencies (25,30,…,45) MHz. The USW coefficients were clearly effected by the frequency varied. The resulted composite film was succeeded to be used as USW sensor, also these findings could help to realize these new NCs as promising materials for wide applications, such as backlight, car glass and UV filters.

Effects of the dispersion of zirconium dioxide nanoparticles on high performance electro-optic properties in liquid crystal devices

2011 ◽  
Vol 38 (7) ◽  
pp. 871-875 ◽  
Author(s):  
Hyung-Jun Kim ◽  
Young-Gu Kang ◽  
Hong-Gyu Park ◽  
Kang-Min Lee ◽  
Seok Yang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Zirconium Dioxide ◽  
High Performance ◽  
Liquid Crystal Devices ◽  
Electro Optic ◽  
Zirconium Dioxide Nanoparticles

Toxic response in human adrenocortical cells exposed to zirconium dioxide nanoparticles

2021 ◽  
Vol 350 ◽  
pp. S94-S95
Author(s):  
L. Zapor ◽  
L. Chojnacka-Puchta ◽  
D. Sawicka ◽  
K. Miranowicz-Dzierżawska ◽  
J. Skowroń
Keyword(s):  
Zirconium Dioxide ◽  
Adrenocortical Cells ◽  
Toxic Response ◽  
Zirconium Dioxide Nanoparticles

scholarly journals Synergistic Effect of Halloysite Nanotubes and Glycerol on the Physical Properties of Fish Gelatin Films

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1258 ◽  
Author(s):  
Xiaohu Qiang ◽  
Songyi Zhou ◽  
Zhuo Zhang ◽  
Qiling Quan ◽  
Dajian Huang
Keyword(s):  
Water Resistance ◽  
Water Solubility ◽  
Composite Films ◽  
Halloysite Nanotubes ◽  
Light Transmittance ◽  
Fish Gelatin ◽  
Moisture Uptake ◽  
Casting Method ◽  
Gelatin Films ◽  
Light Region

Fish gelatin (FG)/glycerol (GE)/halloysite (HT) composite films were prepared by casting method. The morphology of the composite films was observed by scanning electron microscopy (SEM). The effects of HT and GE addition on the mechanical properties, water resistance and optical properties of the composites were investigated. Results showed that with increasing GE content, the elongation at composite breaks increased significantly, but their tensile strength (TS) and water resistance decreased. SEM results showed that GE can partly promote HT dispersion in composites. TS and water resistance also increased with the addition of HTs. Well-dispersed HTs in the FG matrix decreased the moisture uptake and water solubility of the composites. All films showed a transparency higher than 80% across the visible light region (400–800 nm), thereby indicating that light transmittance of the resulting nanocomposites was slightly affected by GE and HTs.

scholarly journals ANALISIS KONDUKTIVITAS DAN TERMAL PADA POLIMER ELEKTROLIT DARI KITOSAN/PVA/GLISEROL/LiClO4 UNTUK APLIKASI BATERAI ION LITIUM

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Nurhadini . ◽  
Verry Andre Fabiani ◽  
Megawati Ayu Putri ◽  
Iin Lestari
Keyword(s):  
Thermal Stability ◽  
Polymer Electrolyte ◽  
Functional Group ◽  
Raw Materials ◽  
Lithium Ion ◽  
Electrolyte Composition ◽  
Wave Number ◽  
Natural Polymers ◽  
Casting Method ◽  
Absorption Intensity

Penggunaan polimer ramah lingkungan merupakan tantangan bagi industri baterai ion litium saat ini dikarenakan sifatnya yang mudah terbiodegradasi menjadi keunggulan polimer alam seperti kitosan dengan bahan baku dari alam yang melimpah. Komposisi polimer elektrolit dalam penelitian ini terdiri atas kitosan, PVA, gliserol yang didopan dengan LiClO4. Penelitian ini bertujuan untuk menganalisis sifat konduktivitas dan termal dari polimer elektrolit kitosan/PVA/gliserol/LiClO4. Pembuatan polimer elektrolit ini menggunakan metode casting. Peningkatan massa kitosan dalam komposisi polimer elektrolit menyebabkan adanya peningkatan intensitas pada bilangan gelombang 1718 cm-1 dan peningkatan intensitas serapan pada bilngangan gelombang 1271 cm-1 dengan masing-masing puncak serapan tersebut adalah gugus fungsi dari C=O dan gugus fungsi C-O.  Berdasarkan data konduktivitas menunjukkan bahwa komposisi 70/30/20/20 (kitosan /PVA/Gliserol/LiClO4) memiliki konduktivitas tertinggi sebesar 4,8 x 10-5S/cm. Hasil kurva TGA menunjukkan stabilitas termal komposisi polimer elektrolit hingga 210oC dan peningkatan jumlah kitosan dalam polimer elektrolit menurunkan kestabilan termal. Polimer elektrolit dari kitosan/PVA/Gliserol/LiClO4 dapat diaplikasikan untuk baterai ion litium berdasarkan analisis konduktivitas ionik dan kestabilan termal. ABSTRACT The use of environmentally friendly polymers is a challenge for the lithium-ion batteries industry today because its biodegradable nature is an advantage of natural polymers such as chitosan with abundant raw materials from nature. The polymer electrolyte composition in this study consisted of chitosan, PVA, glycerol doped with LiClO4. This study aims to analyze the conductivity and thermal properties of the polymer electrolyte chitosan/PVA/Glycerol/LiClO4. The polymer electrolyte was made using a casting method. The increasing of the chitosan mass in the polymer electrolyte composition led to an increase in intensity at the wave number 1718 cm-1 and an increase in absorption intensity at the wavenumber of 1271 cm-1 with absorption peaks being a functional group of C=O and C-O respectively. Based on the conductivity data, it showed that the composition of 70/30/20/20 (chitosan/PVA/Glycerol/LiClO4) had the highest conductivity of 4.8 x 10-5S/cm. The results of the TGA curve illustrated that polymer electrolyte had thermal stability until 210oC and the increasing amount of chitosan of polymer electrolyte decreased thermal stability. Polymer electrolyte chitosan

scholarly journals Polyarylene ether nitrile and boron nitride composites: coating with sulfonated polyarylene ether nitrile

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Renbo Wei ◽  
Qian Xiao ◽  
Chenhao Zhan ◽  
Yong You ◽  
Xuefei Zhou ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Composite Films ◽  
Solution Casting ◽  
Casting Method ◽  
Polyarylene Ether Nitrile ◽  
Arylene Ether ◽  
Ultrasonic Technology ◽  
Solution Casting Method ◽  
Sulfonated Poly

AbstractBoron nitride (BN) coated with sulfonated poly-arylene ether nitrile (SPEN) (BN@SPEN) was used as additive to enhance the thermal conductivity of polyarylene ether nitrile. BN@SPEN was prepared by coating BN micro-platelets with SPEN through ultrasonic technology combined with the post-treatment bonding process. The prepared BN@SPEN was characterized by FTIR, TGA, SEM and TEM, which confirmed the successful coating of BN micro-platelets. The obtained BN@SPEN was introduced into the PEN matrix to prepare composite films by a solution casting method. The compatibility between BN and PEN matrix was studied by using SEM observation and rheology measurement. Furthermore, thermal conductivity of BN@SPEN/PEN films were carefully characterized. Thermal conductivity of BN@SPEN/PEN films was increased to 0.69 W/(m⋅K) at 20 wt% content of BN@SPEN, having 138% increment comparing with pure PEN.

scholarly journals Flexible PEBAX/graphene electromagnetic shielding composite films with a negative pressure effect of resistance for pressure sensors applications

RSC Advances ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 1535-1543 ◽  
Author(s):  
Biao Zhao ◽  
Xi Zhang ◽  
Jiushuai Deng ◽  
Chun Zhang ◽  
Yang Li ◽  
...  
Keyword(s):  
Negative Pressure ◽  
High Efficiency ◽  
Pressure Effect ◽  
Composite Films ◽  
Pressure Sensors ◽  
Electromagnetic Shielding ◽  
Good Sensitivity ◽  
Emi Shielding ◽  
Shielding Properties

Graphene/PEBAX composite films present high-efficiency EMI shielding properties and good sensitivity as well as sensing stability.

scholarly journals Archaeometric Characterisation of Decorated Pottery from the Archaeological Site of Villa dei Quintili (Rome, Italy): Preliminary Study

Geosciences ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 172 ◽  
Author(s):  
Michela Ricca ◽  
Giuseppe Paladini ◽  
Natalia Rovella ◽  
Silvestro Antonio Ruffolo ◽  
Luciana Randazzo ◽  
...  
Keyword(s):  
Multidisciplinary Approach ◽  
Raw Materials ◽  
Archaeological Site ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
X Ray ◽  
Geochemical Study ◽  
Renaissance Period ◽  
Preliminary Study ◽  
Materials Used

This work focused on the study of decorated pottery dated back to the 16th century from the Roman archaeological site of Villa dei Quintili, a monumental complex located in the south-eastern part of Rome (Italy). A minero-petrographic and geochemical study was undertaken to analyse five archaeological samples in order to define textural features and raw materials used for their production, along with the chemical and physical composition of the superficial decorative glazed coatings. For this purpose, different analytical methods were used, such as polarising optical microscope (POM), X-ray diffraction (XRD), micro-Raman spectroscopy, X-Ray fluorescence (XRF), and electron microprobe analysis coupled with energy dispersive spectrometry (EMPA-EDS). The results of such a multidisciplinary approach allowed us to achieve important results crucial to recognise the shards as majolica of the Renaissance period, improving knowledge about manufacturing processes of these renowned painted ceramic artefacts.

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