Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 13

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  composite
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Modification of Polyacrylamide–β–Zeolite Composite by Phytic Acid for the Removal of Lead from Aqueous Solutions

100%
Faghihian H., Farsani S. N.
Polish Journal of Chemical Technology
|
2013
|
vol. 15
|
issue 1
1-6
EN
Polyacrylamide-zeolite composite was prepared by direct polymerization of polyacrylamide in suspensions of β-zeolite. Phytic acid was then immobilized on the composite surface. Fourier transform infrared spectrometry (FT-IR), X-Ray Diffraction (XRD) and Thermal gravimetry (TG) techniques were employed to characterize the synthesized adsorbent. The adsorptive features of the composite and the modified composite were investigated for the removal of Pb2+ from aqueous solution in view of dependency on pH, time, ion concentration, temperature, selectivity, kinetics and reusability. The adsorption isotherms were evaluated with reference to the Langmuir and Freundlich models. Thermodynamic of the system was calculated. ΔG<0 indicated that the adsorption process was spontaneous. Good compatibility of the adsorption kinetics to the pseudo-second-order model predicted that the rate-controlling step was a chemical sorption. The selectivity experiments showed that the adsorbents were selective toward Pb2+ in the presence of Zn2+ and Cd2+. The reusability of the adsorbent was tested for four regeneration cycles.
2
Publication available in full text mode
Content available

THE EFFECT OF A COMPOSITE CHITOSAN-SILVER(I) ION COATING ON THE CORROSION RESISTANCE OF THE COBALT-CHROMIUM-MOLYBDENUM ALLOY IN SALINE SOLUTION

86%
Łosiewicz B., Osak P., Kubisztal J.
Progress on Chemistry and Application of Chitin and its Derivatives
|
2023
|
vol. 28
75-88
EN
We determined the in vitro corrosion resistance of the composite chitosan-silver(I) [Ag(I)] ion coating on the cobalt-chromium-molybdenum (CoCrMo) dental alloy in a 0.9% sodium chloride (NaCl) solution at 37°C. We obtained the novel composite chitosan–Ag(I) ion coating by electrophoretic deposition at 20 V for 30 s at room temperature in a 2% (v/v) aqueous solution of acetic acid with 1 g dm–3 chitosan and 10 g dm–3 silver nitrate. We evaluated the chemical composition with energy dispersive spectroscopy and Fouriert-ransform infrared spectroscopy. We investigated surface topography and electronic properties with a scanning Kelvin probe. We determined the mechanism and kinetics of the electrochemical corrosion of the obtained coatings by electrochemical impedance spectroscopy. The Ag content in the composite chitosan–Ag(I) ion coating was 1.9 ± 1 wt.%. The cataphoretic co-deposition of chitosan and Ag(I) ions in an aqueous solution can be used to modify the CoCrMo alloy surface to obtain new coatings with antibacterial properties.
3
Content available remote

Segregated network polymer/carbon nanotubes composites

86%
Mierczynska A., Friedrich J., Maneck H., Boiteux G., Jeszka J.
Open Chemistry
|
2004
|
vol. 2
|
issue 2
363-370
EN
In this work we present the preparation of conductive polyethylene/carbon nanotube composites based on the segregated network concept. Attention has been focused on the effect of decreasing the amount of filler necessary to achieve low resistivity. Using high- and low-grade single-walled carbon nanotube materials we obtained conductive composites with a low percolation threshold of 0.5 wt.% for high-grade nanotubes, about 1 wt% for commercial nanotubes and 1.5 wt% for low-grade material. The higher percolation threshold for low-grade material is related to low effectiveness of other carbon fractions in the network formation. The electrical conductivity was measured as a function of the single-walled carbon nanotubes content in the polymer matrix and as a function of temperature. It was also found that processing parameters significantly influenced the electrical conductivity of the composites. Raman spectroscopy was applied to study single wall nanotubes in the conductive composites.
4
Publication available in full text mode
Content available

THE EFFECT OF A COMPOSITE CHITOSAN/COPPER(II) ION COATING ON THE CORROSION RESISTANCE OF GRADE 4 TITANIUM IN SALINE: PRELIMINARY RESULTS

86%
Łosiewicz B., Osak P., Kubisztal J.
Progress on Chemistry and Application of Chitin and its Derivatives
|
2023
|
vol. 28
89-102
EN
In the present work, we successfully used electrophoretic deposition to produce a new composite chitosan-copper(II) [Cu(II]) ion coating on grade 4 titanium (Ti). We prepared the coating with an environmentally friendly in situ chemical reduction process from a 2% (v/v) aqueous acetic acid solution with 1 g dm–3 chitosan and 10 g dm–3 copper acetate at 20 V for 300 s at room temperature. We evaluated the relationship between physicochemical properties and corrosion resistance of the coatings with energy dispersive spectroscopy, Fourier-transform infrared spectroscopy, a scanning Kelvin probe, and electrochemical methods. The composite coating contained 2.1 ± 0.1 wt.% of Cu, which ensures antibacterial activity. We determined the mechanism and kinetics of the electrochemical corrosion of the composite chitosan–Cu(II) ion coating on grade 4 Ti in saline solution (0.9% sodium chloride) at 37°C. The surface modification makes grade 4 Ti a more attractive material for use in dentistry.
5
Publication available in full text mode
Content available

The Characteristics of the Granular State of Ceramic Particles in the Aspect of Producing Metal-Ceramic Composite Layers in Molds

86%
Dulska A., Kilarski J., Studnicki A., Szajnar J.
Archives of Foundry Engineering
|
2018
|
issue 3
6
Publication available in full text mode
Content available

Microstructure Evolution of TI/ZRO2 and TI/AL2O3 Composites Prepared by Powder Metallurgy Method

86%
Dercz G., Matuła I., Gurdziel W., Kuczera N.
|
|
issue 2
7
Publication available in full text mode
Content available

Modal analysis of laminated “CAS” and “CUS” box-beams

81%
Gawryluk J., Bocheński M., Teter A., Gawryluk J., Bocheński M., Teter A.
Archive of Mechanical Engineering
|
2017
|
vol. 64
|
issue 4
8
Publication available in full text mode
Content available

Elasticity solution of adhesive tubular joints in laminated composites with axial symmetry

81%
Selahi E., Selahi E.
Archive of Mechanical Engineering
|
2018
|
vol. 65
|
issue 3
9
Publication available in full text mode
Content available

Buckling analysis of composite cylindrical shells reinforced by carbon nanotubes

81%
Jam J. E., Asadi E., Jam J. E., Asadi E.
Archive of Mechanical Engineering
|
2012
|
vol. 59
|
issue 4
10
Publication available in full text mode
Content available

Finite Element Modelling of the Behaviour of a Certain Class of Composite Steel-Concrete Beam-to-Column Joints

72%
Giżejowski M. A., Barcewicz W., Salah W.
Archives of Civil Engineering
|
2010
|
issue 1
11
Publication available in full text mode
Content available

Bond between steel and self-compacting concrete in composite tube columns

71%
Szadkowska M., Szmigiera E., Szadkowska M., Szmigiera E.
Archives of Civil Engineering
|
2017
|
issue 2
12
Publication available in full text mode
Content available

Experimental and numerical analysis of compression thin-walled composite plates weakened by cut-outs

61%
Falkowicz K., Falkowicz K.
Archives of Civil Engineering
|
2017
|
issue 4
13
Publication available in full text mode
Content available

SYNTHESIS AND APPLICATION OF CHITOSAN HYDROXYAPATITE: A REVIEW

58%
Vokhidova N. R., Ergashev K. H., Rashidova S. S.
Progress on Chemistry and Application of Chitin and its Derivatives
|
2022
|
vol. 27
5-34
EN
In this review, the research devoted to synthesising chitosan apatites, their biologically active properties, and their application in medical practice is analysed. The data are from articles published between 2001 and 2022 on the formation of calcium- and phosphorus-containing chitosan composites and the mechanism of their interaction
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.