Characterization of dental composites by thermal analysis, infrared spectroscopy and scanning electron microscopy

2009 ◽  
Vol 97 (2) ◽  
pp. 585-589 ◽  
Author(s):  
C. C. Almeida ◽  
C. G. Mothé
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Infrared Spectroscopy ◽  
Dental Composites ◽  
Scanning Electron

Darstellung und Charakterisierung des Silber(I,II,III)-oxidclathrates Ag7O8HCO3 / Synthesis and Characterization of the Silver(I,II,III) Oxide Clathrate Ag7O8HCO3

2000 ◽  
Vol 55 (9) ◽  
pp. 882-886 ◽  
Author(s):  
Martin Jansen ◽  
Sascha Vensky
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Magnetic Susceptibility ◽  
Solid State Nmr ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The silver(I,II,III) oxide clathrate Ag7O8HCO3 was synthesized by anodic oxidation of silver(I) in a suspension of Ag2CO3 in an aqueous AgF solution. The title compound was characterized by single crystal X-ray diffraction (cubic, Fm3̄m, a = 9.8085(3) Å, Z = 4), scanning electron microscopy, thermal analysis, IR spectroscopy, 1H-solid state-NMR and measurement of the magnetic susceptibility

scholarly journals CHARACTERIZATION OF CELLULOSE AND CELLULOSE NITRATE NANOFILMSSE

FLORESTA ◽  
2019 ◽  
Vol 49 (2) ◽  
pp. 219
Author(s):  
Mayara Elita Carneiro ◽  
Marina Stygar Lopes ◽  
Anna Luisa Franco Baumel de Andrade ◽  
Silvana Nisgoski ◽  
Graciela Inês Bolzon de Muniz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Infrared Spectroscopy ◽  
Cellulose Nitrate ◽  
Mechanical Processing ◽  
Absorption Property ◽  
Kraft Pulps ◽  
Scanning Electron

The objective of this work was the characterization of cellulose and cellulose nitrate nanofilms from the mixture of Kraft pulps of  Pinus sp. and Eucalyptus sp. bleached. The production of nanocellulose was made by mechanical processing. To obtain the cellulose nitrate, the nitration was carried out in part of the produced nanocellulose. The characterizations were performed by means of scanning electron microscopy, medium infrared spectroscopy, tensile strength and absorption assay.  The results demonstrate that there was influence of  nitration in the characteristics of the films produced. The nanofilms of cellulose nitrate appear more interesting for the absorption property, indicating the use of this process for uses that require this characteristic.

Modification and characterization of polysulfone films by ionizing radiation (gamma-rays) with enhanced hydrophilicity

MRS Advances ◽  
2018 ◽  
Vol 3 (63) ◽  
pp. 3833-3837
Author(s):  
Israel Fredy Sánchez-Salinas ◽  
Javier Illescas ◽  
Claudia Rosario Muro-Urista ◽  
Guillermina Burillo ◽  
María del Carmen Díaz Nava
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Contact Angle ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Reaction Time ◽  
Gamma Rays ◽  
Poly Vinyl Alcohol ◽  
Scanning Electron

AbstractPolysulfone (Pfu) films were modified by grafting poly(vinyl alcohol) (PVA) by the oxidative pre-irradiation technique. To achieve this modification, some parameters were modified such as the radiation dose, the concentration of PVA, the temperature and the reaction time. It was found that the grafted films with 12% presented a greater grafting percentage (0.86%). The modified films were characterized by means of the contact angle, Fourier transform infrared spectroscopy (FTIR-ATR) and scanning electron microscopy (SEM) techniques.

Preparation and Characterization of Lizardite

2014 ◽  
Vol 556-562 ◽  
pp. 109-112
Author(s):  
Shu Min Zheng ◽  
Kai Ming Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Hydrothermal Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Lizardite were synthesized by hydrothermal reaction in an Fe3+doped solution/environment using nanometer SiO2and MgO as precursors. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR). The results show that: the synthetic samples are lizardite with a thickness ranging from 60 nm to 200 nm in the temperature range 200°C~230°C.

Crystallization of Aragonite from Vaterite Precursor during Various Refluxing Times

2015 ◽  
Vol 1119 ◽  
pp. 466-470 ◽  
Author(s):  
Radek Ševčík ◽  
Petra Mácová ◽  
Marta Pérez-Estébanez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Powder Diffraction ◽  
X Ray ◽  
Gradual Transformation ◽  
Scanning Electron

CaCO3 polymorphs are intensively studied due to their importance in the nature and the widespread use in the industry as well. This work is dealing with the crystallization of aragonite from vaterite dispersion during the refluxation at 100°C. The characterization of CaCO3 polymorphs during vaterite transformation was performed with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray powder diffraction (XRPD). The influence of the different refluxing times on the aragonite crystallization was discussed. The purest aragonite, 70.7(2) wt.%, was synthetized in the sample refluxed for 60 minutes. Prolonged refluxation strongly affected aragonite crystals with gradual transformation into calcite.

Thermal Characterization of Low Grade Wood Polyacylonitrile Composite

2011 ◽  
Vol 214 ◽  
pp. 392-396 ◽  
Author(s):  
Manoj Kumar ◽  
P.L. Sah ◽  
M.G.H. Zaidi ◽  
Anupam Srivastav
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Untreated Wood ◽  
Thermal Characterization ◽  
Low Grade ◽  
Eucalyptus Wood ◽  
Scanning Electron

A series of wood polyacrylonitrile (PAN) composites (WPCs) were synthesized through impregnation polymerization of Eucalyptus wood (Eucalyptus Grandies) by acrylonitrile (AN) in methanol (20-60% v/v) in the presence of benzoyl peroxide (1.0% w/v) in benzene medium at 70 ±10C. This resulted in corresponding WPCs with polyacrylonitrile (PAN) loading in the range of 15.5-20%. Loading of PAN into wood, as ascertained through TGA, DTGA and DTA and supported by Fourier Transform Infrared Spectroscopy (FTIR) as well as Scanning Electron Microscopy (SEM) was found to increase the resistance against thermo-oxidation of WPCs in comparison to untreated wood.

Preparation and Characterization of Fibri-Form Silica from Short Chrysotile Fibers by Mix-Roasting

2014 ◽  
Vol 809-810 ◽  
pp. 313-318
Author(s):  
Peng Cheng Song ◽  
Tong Jiang Peng ◽  
Hong Juan Sun ◽  
Yu Cao Yu
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Fluorescence Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fibrous Morphology ◽  
Ft Ir ◽  
Scanning Electron

Fibri-form silica was extracted from short chrysotile fibers by mix-roasting with ammonium bisulfate. The fibri-form silica were characterized by X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), thermogravimetry and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FT-IR) and N2 adsorption isotherms. The results show that the fibri-form silica with disordered crystalline structure, but also in fibrous morphology. The surface area and pore volume of fibri-form silica are 181.66 m2/ g and 0.44 cc/ g, respectively. The structure of fibri-form silica is stable, no phase transformed from 50 to 1200 oC.

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