Study of interactions at water-soluble polymer/Ca(OH)2 or gibbsite interfaces by XPS

Sugama, T.; Kukacka, L.E.; Carciello, N.; Hocker, Nancy

doi:10.1016/0008-8846(89)90098-7

Cited by 79 publications

(21 citation statements)

References 13 publications

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“…, third column) and comparable literature values of binding energy position for a given functional group. The aliphatic (CH 2 / C–C) component of the C (1s) region was located at (284.7 ± 0.3) eV, and composed (49.01 ± 1.93) % of the unexposed samples. While the literature reported slightly different binding energies for carbon bound to nitrogen as opposed to carbon bound to oxygen for their peak maxima (e.g.…”

Section: Resultsmentioning

confidence: 99%

Photo‐induced surface transformations of silica nanocomposites

Gorham

Nguyen

Bernard

et al. 2012

Surface & Interface Analysis

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The photo‐induced, physicochemical surface transformations to silica nanoparticle (SiNP) ‐ epoxy composites have been investigated. The silica nanocomposites (SiNCs) were prepared using a two‐part epoxy system with a 10% mass fraction of SiNPs and exposed to varying doses of high intensity, ultraviolet (UV) radiation at wavelengths representative of the solar spectrum at sea level (290 nm to 400 nm) under constant temperature and humidity. Visibly apparent physical modifications to the SiNC surface were imaged with scanning electron microscopy. Surface pitting and cracking became more apparent with increased UV exposure. Elemental and surface chemical characterization of the SiNCs was accomplished through X‐ray energy dispersive spectroscopy and X‐ray photoelectron spectroscopy, while attenuated total reflectance Fourier transform infrared spectroscopy revealed changes to the epoxy's structure. During short UV exposures, there was an increase in the epoxy's overall oxidation, which was accompanied by a slight rise in the silicon and oxygen components and a decrease in overall carbon content. The initial carbon components (e.g. aliphatic, aromatic and alcohol/ether functionalities) decreased and more highly oxidized functional groups increased until sufficiently long exposures at which point the surface composition became nearly constant. At long exposure times, the SiNC's silicon concentration increased to form a surface layer composed of approximately 75% silica (by mass). Published 2012. This article is a U.S. Government work and is in the public domain in the USA.

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Section: Resultsmentioning

confidence: 99%

Photo‐induced surface transformations of silica nanocomposites

Gorham

Nguyen

Bernard

et al. 2012

Surface & Interface Analysis

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“…It should be noted that in some papers the E O 1s value equal to 531.4 eV has been given for hydrated aluminum oxide (Al 2 O 3 9 3H 2 O, gibbsite) and about 531.1 eV-for the hydroxide Al(OH) 3 [29,30]. Hence it is impossible to separate the contributions of aluminum oxide and hydroxide only on the basis of E O 1s value.…”

Section: Resultsmentioning

confidence: 95%

Plasma electrolytic ceramic-like aluminum oxide coatings on iron

et al. 2009

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The process characteristics of plasma-assisted electrochemical treatment of iron in aluminate electrolyte consisted of aqueous 0.1 M NaAlO 2 ? 0.05 M NaOH have been studied. It has been shown that in the range of DC voltages from 260 to 340 V, it is possible to deposit dense ceramic-like coatings with the thickness increased from 0.3-0.5 lm after 1 min deposition time to 25-30 lm for 1 h of deposition. The coatings were examined by X-ray diffractometry, Fourier-transformed infrared, X-ray photoelectron spectroscopy, scanning electron microscopy, and an electrochemical potentiodynamic voltammetry. It is shown that in pre-spark conditions (100-200 V) and on the initial stages of micro-arc anodizing the forming films contain, along with amorphous aluminum oxide/hydroxide, a substantial amount of iron oxide/hydroxide. The coatings obtained by micro-arc anodizing at 260-360 V for 10-60 min represent amorphous aluminum oxide with inclusions of crystalline corundum phase. The films with a thickness of 4-15 lm deposited at the anodizing voltage of 320-360 V exhibited the uniformity and good corrosion protection properties after sealing with common agents.

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“…New Ca2p XPS peaks for the samples treated with Rhizomucor pusillus emerge at 347.48 eV (~0.9 at.% calcium) while those for samples treated with Chrysosporium merdarium emerge at 347.62 eV (~0.19 at.% calcium). This is a result of the influence of the microbial metabolism and synthesis of multifunctional and hybrid biomolecular shade composed of poly(acrylic acid)/calcium hydroxide in the first case and CaO in the second case and …”

Section: Resultsmentioning

confidence: 99%

The mycological effect on morphological, electrochemical and redox properties of the polyaniline surface

Binkauskienė

Lugauskas

Bukauskas

2013

Surface & Interface Analysis

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Biofilm formation with eight different microscopic fungi on the polyaniline surface and its effect on the morphological, electrochemical and redox properties have been studied. The investigations on selected Chrysosporium merdarium and Rhizomucor pusillus fungi behavior were performed. Conspicuous difference in the oxidation level, redox activity and oxalate impurities at the polymer surface layer treated with Chrysosporium merdarium and Rhizomucor pusillus was confirmed. The electrochemical behavior of the modified electrode was characterized using the cyclic voltammetry technique. The chemical composition of treated surface was determined by X‐ray photoelectron spectroscopy. For the estimation of conductive polymer morphology and roughness, the method of optical and scanning probe microscopy was applied, which showed that the polyaniline surfaces treated with Chrysosporium merdarium are homogenous and smoother than the polyaniline surfaces treated with Rhizomucor pusillus. Water contact angle measurements confirmed the effect of microbial growth on the properties of the polyaniline surface. Copyright © 2013 John Wiley & Sons, Ltd.

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Study of interactions at water-soluble polymer/Ca(OH)2 or gibbsite interfaces by XPS

Cited by 79 publications

References 13 publications

Photo‐induced surface transformations of silica nanocomposites

Photo‐induced surface transformations of silica nanocomposites

Plasma electrolytic ceramic-like aluminum oxide coatings on iron

The mycological effect on morphological, electrochemical and redox properties of the polyaniline surface

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