Confocal Raman imaging, FTIR spectroscopy and kinetic modelling of the zinc oxide/stearic acid reaction in a vulcanizing rubber

Polymer ◽  
2013 ◽  
Vol 54 (2) ◽  
pp. 685-693 ◽  
Author(s):  
Pellegrino Musto ◽  
Domenico Larobina ◽  
Salvatore Cotugno ◽  
Paolo Straffi ◽  
Giuseppe Di Florio ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Stearic Acid ◽  
Ftir Spectroscopy ◽  
Kinetic Modelling ◽  
Raman Imaging ◽  
Acid Reaction ◽  
Confocal Raman

3D confocal Raman imaging of oil-rich emulsion from enzyme-assisted aqueous extraction of extruded soybean powder

2018 ◽  
Vol 249 ◽  
pp. 16-21 ◽  
Author(s):  
Longkun Wu ◽  
Limin Wang ◽  
Baokun Qi ◽  
Xiaonan Zhang ◽  
Fusheng Chen ◽  
...  
Keyword(s):  
Raman Imaging ◽  
Aqueous Extraction ◽  
Soybean Powder ◽  
Confocal Raman

scholarly journals Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 183
Author(s):  
Ghiath Jnido ◽  
Gisela Ohms ◽  
Wolfgang Viöl
Keyword(s):  
Zinc Oxide ◽  
Ftir Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Color Change ◽  
Uv Light ◽  
Beech Wood ◽  
Nitrate Solution ◽  
Ftir Spectra ◽  
Solution Precursor ◽  
Wood Surfaces

In the present work, the solution precursor plasma spray (SPPS) process was used to deposit zinc oxide (ZnO) coatings on wood surfaces using zinc nitrate solution as precursor to improve the hydrophobicity and the color stability of European beech wood under exposure to ultraviolet (UV) light. The surface morphology and topography of the wood samples and the coatings were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The formation of ZnO was detected with the help of X-ray photoelectron spectroscopy (XPS) and by Fourier transform infrared (FTIR) spectroscopy. The FTIR spectra of the coated samples showed the typical Zn–O band at 445 cm−1. According to the XPS analysis, the coatings consist of two different Zn-containing species: ZnO and Zn(OH)2. Variation of the deposition parameters showed that the most significant parameters affecting the microstructure of the coating were the solution concentration, the deposition scan speed, and carrier gas flow rate. The wettability behaviors of the coated wood were evaluated by measuring the water contact angle (WCA). The coatings that completely covered the wood substrates showed hydrophobic behaviors. UV-protection of wood surfaces after an artificial UV light irradiation was evaluated by color measurements and FTIR spectroscopy. The ZnO-coated wood surfaces were more resistant to color change during UV radiation exposure. The total color change decreased up to 60%. Additionally, the FTIR spectra showed that the wood surfaces coated with ZnO had more stability. The carbonyl groups formation and C=C-bonds consumption were significantly lower.

Confocal Raman imaging and chemometrics applied to solve forensic document examination involving crossed lines and obliteration cases by a depth profiling study

The Analyst ◽  
2017 ◽  
Vol 142 (7) ◽  
pp. 1106-1118 ◽  
Author(s):  
Flávia de Souza Lins Borba ◽  
Tariq Jawhari ◽  
Ricardo Saldanha Honorato ◽  
Anna de Juan
Keyword(s):  
Analytical Method ◽  
Depth Profiling ◽  
Raman Imaging ◽  
Confocal Raman ◽  
Document Examination ◽  
Non Destructive

This article describes a non-destructive analytical method developed to solve forensic document examination problems involving crossed lines and obliteration.

Phospholipids accumulation and calcification in cultured primary human aortic valve interstitial cells: New insights revealed by confocal Raman imaging

2019 ◽  
Vol 51 (1) ◽  
pp. 104-114
Author(s):  
Krzysztof Czamara ◽  
Magdalena Kopytek ◽  
Malgorzata Szulczewska ◽  
Agnieszka Kaczor ◽  
Joanna Natorska
Keyword(s):  
Aortic Valve ◽  
Interstitial Cells ◽  
Raman Imaging ◽  
Valve Interstitial Cells ◽  
Confocal Raman ◽  
Human Aortic Valve

Effect of Sulfur and Dicumyl Peroxide on Vulcanization of Natural Rubber with Tetramethylthiuram Disulfide and Zinc Oxide

1970 ◽  
Vol 43 (6) ◽  
pp. 1294-1310 ◽  
Author(s):  
S. P. Manik ◽  
S. Banerjee
Keyword(s):  
Zinc Oxide ◽  
Stearic Acid ◽  
Natural Rubber ◽  
Reaction Mechanisms ◽  
Elemental Sulfur ◽  
Initial Rate ◽  
Dicumyl Peroxide ◽  
Tetramethylthiuram Disulfide ◽  
Sulfur Vulcanization ◽  
Salient Features

Abstract The salient features of both non-elemental sulfur vulcanization by TMTD and elemental sulfur vulcanization promoted by TMTD both in presence and absence of ZnO and stearic acid have been studied. TMTD increases the rate of DCP decomposition and lowers the crosslinking maxima due to DCP depending on its concentration. However, with higher amounts of TMTD the initial rate of crosslinking is increased with the increased amount of TMTD, while crosslinking maxima are still lowered due to reversion. ZnO or ZnO-stearic acid, however, seems to alter the entire course of the reaction. Both the crosslink formation and TMTD decomposition are much higher in presence of ZnO or ZnO-stearic acid, but stearic acid seems to have no effect. The reaction mechanisms for TMTD accelerated sulfuration in absence and presence of ZnO have also been studied.

A Confocal Raman Imaging Study of an Optically Transparent Boron-Doped Diamond Electrode

2002 ◽  
Vol 106 (42) ◽  
pp. 10816-10827 ◽  
Author(s):  
Michel Mermoux ◽  
Bernadette Marcus ◽  
Greg. M. Swain ◽  
James E. Butler
Keyword(s):  
Imaging Study ◽  
Raman Imaging ◽  
Boron Doped Diamond ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Boron Doped Diamond Electrode ◽  
Optically Transparent ◽  
Confocal Raman

Studies on Dicumyl Peroxide Vulcanization of Styrene—Butadiene Rubber in Presence of Sulfur and 2-Mercaptobenzothiazole

1974 ◽  
Vol 47 (2) ◽  
pp. 266-281 ◽  
Author(s):  
C. K. Das ◽  
S. Banerjee
Keyword(s):  
Zinc Oxide ◽  
Stearic Acid ◽  
Crosslink Density ◽  
Addition Reaction ◽  
Styrene Butadiene Rubber ◽  
Methyl Groups ◽  
Butadiene Rubber ◽  
First Order ◽  
First Order Kinetics ◽  
Styrene Butadiene

Abstract The effect of sulfur, MBT, zinc oxide, and stearic acid on the DCP vulcanization of SBR has been studied. DCP decomposition obeys first order kinetics in all cases, but its rate constant is higher in presence of MBT. Sulfur and MBT reduce the crosslink density due to DCP. In the mixes containing sulfur, MBT, zinc oxide, and stearic acid in presence of DCP the crosslink density is initially additive. Here oxidation of some pendent vinyl groups are effected by DCP, and these groups also take part in thiol addition reaction with MBT. The thiazole accelerated sulfuration of SBR proceeds fundamentally by the same mechanism as reported for NR, but the details show slight difference chiefly due to the presence of pendent vinyl groups and styrene units in the chain and due to the absence of pendent methyl groups in SBR.

Monitoring UVR induced damage in single cells and isolated nuclei using SR-FTIR microspectroscopy and 3D confocal Raman imaging

The Analyst ◽  
2014 ◽  
Vol 139 (17) ◽  
pp. 4200-4209 ◽  
Author(s):  
Ewelina Lipiec ◽  
Keith R. Bambery ◽  
Philip Heraud ◽  
Wojciech M. Kwiatek ◽  
Don McNaughton ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Lipid Accumulation ◽  
Single Cells ◽  
Raman Imaging ◽  
Isolated Nuclei ◽  
Ftir Microspectroscopy ◽  
Confocal Raman ◽  
Ftir And Raman Spectroscopy

Melanocytes exposed to artificial sunlight and analysed with FTIR and Raman spectroscopy show changes in DNA bands and evidence of lipid accumulation.

The Change in the Crystal Structure of Zinc Oxide in a Binary ε-Caprolactam–Stearic Acid Melt

2009 ◽  
Vol 36 (11) ◽  
pp. 19-22
Author(s):  
A.F. Puchkov ◽  
V.F. Kablov ◽  
E.V. Talbi ◽  
V.N. Arisova
Keyword(s):  
Crystal Structure ◽  
Zinc Oxide ◽  
Stearic Acid
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