Chemical reaction between polyvinyl alcohol and titanate coupling agent with x-ray photoelectron spectroscopy

2003 ◽  
Vol 18 (2) ◽  
pp. 71-74 ◽  
Author(s):  
Li Bei-xing ◽  
Zhang Wen-sheng
Keyword(s):  
Polyvinyl Alcohol ◽  
Chemical Reaction ◽  
Coupling Agent ◽  
Photoelectron Spectroscopy ◽  
X Ray

Preparation and Characterization of Ni2+-Montmorillonite/Polyvinyl Alcohol Water-Soluble Nanocomposite Film

2005 ◽  
Vol 13 (8) ◽  
pp. 839-846 ◽  
Author(s):  
Li-Ping Wang ◽  
Yun-Pu Wang ◽  
Fa-Ai Zhang
Keyword(s):  
Polyvinyl Alcohol ◽  
Photoelectron Spectroscopy ◽  
Thermal Characteristics ◽  
Water Soluble ◽  
Scanning Calorimetry ◽  
Xps Spectra ◽  
X Ray ◽  
Alcohol Water ◽  
Ft Ir ◽  
Silicate Layers

A new type of nano-composite film was prepared from polyvinyl alcohol, Ni2+-montmorillonite (Ni2+-MMT), defoamer, a levelling agent and a plasticizer. Its thermal characteristics were studied by Differential Scanning Calorimetry (DSC). The intermolecular interactions were measured by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the tensile strength (TS) and elongation at break (%E) were measured. The microstructures were studied by X-ray diffraction (XRD) and atomic force microscopy (AFM). FT-IR and XPS spectra indicated that cross-linking has taken place between PVA and Ni2+-MMT. XRD and AFM indicate that the PVA molecules had inserted themselves into the silicate layers of MMT, exfoliating them and dispersing them randomly into the PVA matrix. Compared to pure PVA film, the TS of the films was increased and %E decreased when the Ni2+-Montmorillonite was added and the dissolution temperature of the film was also reduced.

scholarly journals X-Ray Photoelectron Spectroscopy Study of Silane Coupling Agents/Basalt Fiber Interface

2011 ◽  
Vol 236-238 ◽  
pp. 1467-1471 ◽  
Author(s):  
Ya Lan Liu ◽  
Shi Jie Shen ◽  
Li Zhang ◽  
Ling Min Shao
Keyword(s):  
Coupling Agent ◽  
Photoelectron Spectroscopy ◽  
Silane Coupling Agent ◽  
Basalt Fiber ◽  
Fiber Surface ◽  
Chemical Compositions ◽  
Hydroxyl Groups ◽  
Silane Coupling Agents ◽  
X Ray ◽  
Silane Coupling

In this paper, two types of fiber surface treatment methods, namely heat treatment and chemical coupling, were used to improve the basalt fiber surface properties. The basalt fiber surface was heated under 250Celsius degree for 30minites, and then was treated by silane coupling agent ethanol solution with different concentrations. X-ray photoelectron spectroscopy (XPS) was utilized to study the surface chemical compositions of basalt fiber after treatments. The XPS analysis indicated that chemical bonds between basalt fiber and KH-550 have occurred, and silanols were adsorbed to the surface of basalt fibers by an ether linkage between the silanols and the hydroxyl groups of the fibers. When the concentration of KH-550 is 0.8wt%, the optimal bonding condition is formed between basalt fiber and silane coupling agent.

X-ray photoelectron spectroscopy investigation of the mechanism of formation of carbine in nanomodified polyvinyl alcohol

2015 ◽  
Vol 57 (7) ◽  
pp. 1469-1471
Author(s):  
I. N. Shabanova ◽  
V. A. Trapeznikov ◽  
N. S. Terebova ◽  
G. V. Sapozhnikov
Keyword(s):  
Polyvinyl Alcohol ◽  
Photoelectron Spectroscopy ◽  
Mechanism Of Formation ◽  
X Ray

X-ray photoelectron spectroscopy studies of bond structure between polyvinyl alcohol and a titanate cross-coupling agent

1995 ◽  
Vol 10 (6) ◽  
pp. 1565-1571 ◽  
Author(s):  
Mehmet A. Gülgün ◽  
Oludele O. Popoola ◽  
Waltraud M. Kriven
Keyword(s):  
Polyvinyl Alcohol ◽  
Photoelectron Spectroscopy ◽  
Three Dimensional ◽  
Cross Coupling ◽  
X Ray ◽  
Organic Complexes ◽  
Dimensional Network ◽  
Triethanol Amine ◽  
Spectroscopy Studies ◽  
Scanning Electron

Chemical interactions between polyvinyl alcohol (PVA) and triethanol amine titanate chelate were studied using x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The titanate chelate cross coupled the PVA solution and produced a viscous gel. The gel had a three-dimensional network structure containing -CPVA-O-Ti-O-CPVA- organic complexes. A new C(ls) signature at 285.7 eV and an O(ls) signature at 531.25 eV were associated with the formation of these complexes. The water of the PVA solution was physically retained in the gelled structure and was readily available for chemical reactions. The removal of this entrapped water was irreversible and led to a collapsed film of Ti-cross-linked PVA.

Bond Mechanics and Failure Mode of Conductive Silver Adhesive for Transducer

2013 ◽  
Vol 873 ◽  
pp. 837-844
Author(s):  
Chun Ying Wang ◽  
Rui Zhang
Keyword(s):  
Electron Microscopy ◽  
Coupling Agent ◽  
Photoelectron Spectroscopy ◽  
Fracture Morphology ◽  
Fracture Type ◽  
Cohesive Failure ◽  
X Ray ◽  
Piezoelectric Patch ◽  
Physical And Chemical ◽  
Scanning Electron

In this paper, a novel conductive silver adhesive (ECA) for transducer is prepared to bond piezoelectric patch and the aluminum substrate. X-ray photoelectron spectroscopy (XPS) is used to study the fracture elements in order to analyze bond mechanics, fracture morphology is observation by scanning electron microscopy (SEM). The result of test and analysis shows ECA with sliane coupling agent have both physical and chemical bonding and the fracture type is cohesive failure. However the ECA without sliane coupling agent only has physical bonding and fracture type is mixed failure.

scholarly journals Chitosan as a Coupling Agent for Phosphate Glass Fibre/Polycaprolactone Composites

Fibers ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 97 ◽  
Author(s):  
Chao Tan ◽  
Chris Rudd ◽  
Andrew Parsons ◽  
Nusrat Sharmin ◽  
Junxiao Zhang ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Glass Fibre ◽  
Coupling Agent ◽  
Photoelectron Spectroscopy ◽  
Acetic Acid Solution ◽  
Fibre Surface ◽  
X Ray ◽  
Single Fibres ◽  
Amine Groups ◽  
Sem Analyses

This study shows that chitosan (CS) could be highly useful as a coupling agent in phosphate glass fibre/polycaprolactone (PGF/PCL) composites, as it improved the interfacial shear strength by up to 78%. PGFs of the composition 45P2O5–5B2O3–5Na2O–24CaO–10MgO–11Fe2O3 were dip-coated with CS (with a degree of deacetylation >80%) dissolved in acetic acid solution (2% v/v). Different CS concentrations (3–9 g L−1) and coating processes were investigated. Tensile and fragmentation tests were conducted to obtain the mechanical properties of the single fibres and interfacial properties of the PGF/PCL composites, respectively. It was observed that post-cleaning, the treated fibres had their tensile strength reduced by around 20%; however, the CS-coated fibres experienced strength increases of up to 1.1–11.5%. TGA and SEM analyses were used to confirm the presence of CS on the fibre surface. FTIR, Raman, and X-ray photoelectron spectroscopy (XPS) analyses further confirmed the presence of CS and indicated the protonation of CS amine groups. Moreover, the nitrogen spectrum of XPS demonstrated a minimum threshold of CS coating required to provide an improved interface.

In Situ Observation of a Surface Chemical Reaction by Fast X-Ray Photoelectron Spectroscopy

1999 ◽  
Vol 121 (34) ◽  
pp. 7969-7970 ◽  
Author(s):  
Adam F. Lee ◽  
Karen Wilson ◽  
Ruth L. Middleton ◽  
Alessandro Baraldi ◽  
Andrea Goldoni ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Photoelectron Spectroscopy ◽  
In Situ Observation ◽  
Surface Chemical ◽  
Surface Chemical Reaction ◽  
X Ray

scholarly journals Effect of Polyvinyl Alcohol Ligands on Supported Gold Nano-Catalysts: Morphological and Kinetics Studies

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 879
Author(s):  
Stefano Scurti ◽  
Eleonora Monti ◽  
Elena Rodríguez-Aguado ◽  
Daniele Caretti ◽  
Juan Antonio Cecilia ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Polyvinyl Alcohol ◽  
Photoelectron Spectroscopy ◽  
Catalytic Mechanism ◽  
Weight Ratio ◽  
Metal Nanoparticle ◽  
X Ray ◽  
Nano Catalysts ◽  
Supported Gold

The effect of polyvinyl alcohol (PVA) stabilizers and gold nanoparticles supported on active carbon (AuNPs/AC) was investigated in this article. Polymers with different molecular weights and hydrolysis degrees have been synthesized and used, like the stabilizing agent of Au nano-catalysts obtained by the sol-immobilization method. The reduction of 4-nitrophenol with NaBH4 has been used as a model reaction to investigate the catalytic activity of synthesized Au/AC catalysts. In addition, we report several characterization techniques such as ultraviolet-visible spectroscopy (UV-Vis), dynamic light scattering (DLS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) in order to correlate the properties of the polymer with the metal nanoparticle size and the catalytic activity. A volcano plot was observed linking the catalytic performance with hydrolysis degree and the maximum of the curve was identified at a value of 60%. The Au:PVA-60 weight ratio was changed in order to explain how the amount of the polymer can influence catalytic properties. The effect of nitroaromatic ring substituents on the catalytic mechanism was examined by the Hammett theory. Moreover, the reusability of the catalyst was investigated, with little to no decrease in activity observed over five catalytic cycles. Morphological and kinetic studies reported in this paper reveal the effect of the PVA polymeric stabilizer properties on the size and catalytic activity of supported gold nanoparticles.

Photoemission Study of Metal-Deposited p-Sexiphenyl Film

1999 ◽  
Vol 598 ◽  
Author(s):  
E. Ito ◽  
N. Koch ◽  
H. Oji ◽  
H. Ishii ◽  
G. Leising ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Photoelectron Spectroscopy ◽  
Electron Spectroscopy ◽  
Alkali Metals ◽  
Ultraviolet Photoelectron Spectroscopy ◽  
Level Shift ◽  
Vacuum Level ◽  
X Ray ◽  
Photoemission Study ◽  
Gap States

ABSTRACTMetal deposition on a p-sexiphenyl (6P) film was studied by ultraviolet photoelectron spectroscopy (UPS), metastable atom electron spectroscopy (MAES), and X-ray photoelectron spectroscopy (XPS). The deposited metals were Au, Mg, and several alkali metals (K, Na, Rb, and Cs). No chemical reaction between 6P and Au or Mg was observed in the measured spectra, while additional gap states appeared in the UPS and MAES spectra by deposition of the alkali metals. The diffusion of Au and Mg atoms into the 6P film was observed in the MAES spectra. We found the trend of the vacuum level shift is different between the systems of the 6P on the Au and its reversed systems (Au on the 6P film), suggesting the different formation of the interface depending on the deposition sequence.

Chemical Reaction Between Polymers (Pc, Pmma, and Pet) and Oxygen Gas During Ar+ Irradiation

1995 ◽  
Vol 396 ◽  
Author(s):  
Sung-Chul Park ◽  
Hyung-Jin Jung ◽  
Seok-Keun Koh
Keyword(s):  
Contact Angle ◽  
Chemical Reaction ◽  
Photoelectron Spectroscopy ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Peak Ratio ◽  
Xps Spectra ◽  
Oxygen Environment ◽  
X Ray ◽  
Oxygen Gas

AbstractA surface of PC, PMMA, and PET samples irradiated with Ar+ ion of 1 keV energy with and without oxygen environment was investigated by contact angle measurement and x-ray photoelectron spectroscopy (XPS) spectra. Contact angle of water droplets on the irradiated surface of the polymers decreased and remained almost constant with increasing Ar+ irradiation without oxygen. However, when the polymers were irradiated under oxygen environment, the contact angle markedly decreased with increasing ion dose upto 1016 ions/cm2. XPS results show that, after Ar+ irradiation under oxygen, hydrophilic groups were developed on PC, PMMA, and PET. The peak ratio (O/C) of PET irradiated without oxygen decreased with increasing ion dose, whereas that of PET irradiated under oxygen increased with ion dose upto 1016 ions/cm2

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