Yazar "Pekcan, Önder" için listeleme
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Cation Effect on Slow Release from Alginate Beads: A Fluorescence Study
Kaygusuz, Hakan; Erim, F. Bedia; Pekcan, Önder; Evingür, Gülşen Akın (Springer/Plenum Publishers, 2014)In this study, spherical alginate beads containing pyranine (P-y) as a fluorescence probe were prepared by ionotropic gelation of a sodium alginate solution. The steady state fluorescence technique was used to study pyranine ... -
Drying of polyacrylamide-multiwalled carbon nanotube (MWNT) composites with various MWNTs contents: a fluorescence study
Evingür, Gülşen Akın; Pekcan, Önder (Walter De Gruyter Gmbh, 2013)We studied the drying of polyacrylamide (PAAm)-multiwalled carbon nanotube (MWNT) composites, prepared by free radical crosslinking copolymerization in water, with a steady state fluorescence technique. Composite gels were ... -
Effect of Calcium Ion Concentration on Small Molecule Desorption from Alginate Beads
Evingür, Gülşen Akın; Kaygusuz, Hakan; Erim, F. Bedia; Pekcan, Önder (Taylor & Francis Inc, 2014)Spherical alginate beads were prepared by ionotropic gelation of sodium alginate through the use of calcium ions. Pyranine (Py) was added to the alginate solution as a small molecule probe for fluorescence studies. Desorption ... -
Effect of Content and Temperature On the Phase Transitions of Polymer Composites Doped By Kappa Carrageenan and Alginate
Evingür, Gülşen Akın; Pekcan, Önder (Elsevier Academic Press Inc, 2016)[No Abstract Available] -
Effect of multiwalled carbon nanotube (MWNT) on the behavior of swelling of polyacrylamide-MWNT composites
Evingür, Gülşen Akın; Pekcan, Önder (Sage Publications Ltd, 2014)The purpose of this paper is to discuss the role of multiwalled carbon nanotube in the swelling of polyacrylamide-multiwalled carbon nanotube composites. Swelling experiments were performed in water at various temperatures ... -
The Effect of Pyranine and MoS2 Content on the Optical Properties of Polyacrylamide-MoS2 Composite Gels
Özuğur Uysal, Bengü; Osma, Büşra; Evingür, Gülşen Akın; Pekcan, Önder (Taylor and Francis Ltd., 2024)The most favorable members of the class of two-dimensional (2D) materials, molybdenum sulfide (MoS2), graphene, and tungsten disulfide (WS2) have become a thriving research frontier for many applications, ranging from ... -
Effect of temperature and graphene oxide on the swelling of PAAm-GO composite gels
Osma, Büşra; Evingür, Gülşen Akın; Pekcan, Önder (Avestia Publishing, 2019)Graphene oxide (GO) is a two dimensional carbon material with similar one-atom thickness, and is a light material having extremely high strength and thermal stability [1]. Thus, GO is an efficient filler for the enhancement ... -
Elastic percolation of swollen polyacrylamide (PAAm)-multiwall carbon nanotubes composite
Evingür, Gülşen Akın; Pekcan, Önder (Taylor & Francis Ltd, 2012)Polyacrylamide (PAAm)-multiwalled carbon nanotube (MWNT) composites were prepared via free radical cross-linking copolymerization with different amounts of MWNTs varying in the range between 0.1 and 50 wt%. The mechanical ... -
Elastic Properties of a Swollen PAAm-NIPA Copolymer with Various NIPA Contents
Evingür, Gülşen Akın; Pekcan, Önder (Taylor & Francis Inc, 2014)Copolymer based on cross-linked polyacrylamide (PAAm) having N-isopropylacrylamide (NIPA) was prepared and their elastic properties were studied as a function of NIPA contents. NIPA content dependency of the shear modulus, ... -
Elastic properties of a swollen polyacrylamide (PAAm) gel doped with various multiwalled carbon nanotube (MWNT) contents
Evingür, Gülşen Akın; Pekcan, Önder (Carl Hanser Verlag, 2017)The toughness UT and shear modulus S of polyacrylamide (PAAm) multiwalled carbon nanotube (MWNTs) composites were studied with various MWNT contents. These composites were prepared via free radical crosslinking copolymerization ... -
Elasticity Study of PAAm-kappa C Composite Prepared in Various kappa C Content and Measured at Several Temperatures
Evingür, Gülşen Akın; Pekcan, Önder (Polish Acad Sciences Inst Physics, 2015)Polyacrylamide (PAAm)-kappa carrageenan (kappa C) composite gels were prepared via free radical crosslinking copolymerization with various (w/v) percentages of kappa C in the range between 0.5 and 3 (w/v)% of kappa C . ... -
Evaluation of the fractal dimension of polyacrylamide during gelation and swelling
Arda, Ertan; Kara, Selim; Pekcan, Önder; Evingür, Gülşen Akın (Elsevier, 2021)The photon scattering method was performed to monitor the free radical crosslinking copolymerization (FCC) of acrylamide (AAm) applied with N,N'-methylenebis (acrylamide) (Bis) in time. FCC experiments were conducted using ... -
Fluorescence study of effect of particle size in PS latex/Al2O3 nanocomposite films
Uğur, Şaziye; Sunay, M. Selin; Pekcan, Önder (Maney Publishing, 2015)Steady state fluorescence and BioUV-Visible techniques were used to study film formation of polystyrene (PS) latex and Al2O3 composites depending on PS particles size and Al2O3 content. Two film series (SmPS/Al2O3 and ... -
Fluorescence Study of Film Formation from PS Latex-TiO2 Composites: Effects of TiO2 Content, Film Thickness and Particle Size
Uğur, Şaziye; Sunay, M. Selin; Pekcan, Önder (Amer Scientific Publishers, 2015)Steady-state fluorescence (SSF) technique in conjunction with UV-visible (UVV) technique, atomic force microscope (AFM) and scanning electron microscope (SEM) is used for studying film formation from TiO2 covered polystyrene ... -
Fluorescence study of film formation from PS/Al2O3 nanocomposites
Pekcan, Önder; Ugur, Şaziye; Sunay, M. Selin (Elsevier Science Sa, 2014)Steady state fluorescence (SSF) and UV-vis (UVV) techniques were used to study the film formation behavior of pyrene (P) labeled polystyrene (PS) latex and Al2O3 (PS/Al2O3) composites depending on PS particles size and ... -
Fractal dimension and phase transition of graphene oxide (GO) doped polyacrylamide
Evingür, Gülşen Akın; Pekcan, Önder (Elsevier Sci Ltd, 2020)Graphene Oxide (GO)- Polyacrylamide composites prepared between 5 and 50 mu l GO were performed by Fluorescence Spectroscopy. The phase transition performed on the composites was measured by calculating the critical ... -
Gelation of PAAm-PVP composites: A fluorescence study
Evingür, Gülşen Akın; Kaygusuz, Hakan; Erim, F. Bedia; Pekcan, Önder (World Scientific Publ Co Pte Ltd, 2014)Hybrid hydrogels are a new class of composite materials. Polyacrylamide (PAAm) hydrogels are mainly produced by free radical crosslinking copolymerization (FCC) of AAm in the presence of N, N'-methylene bis (acrylamide) ... -
Investigation of Drying of Poly(N-isoproplacrylamide-co-acrylamide) by Fluorescence Technique
Evingür, Gülşen Akın; Pekcan, Önder (Wiley-Blackwell, 2013)The steady-state fluorescence technique was performed on drying of various molar percentages of poly(N-isopropylacrylamide-co- acrylamide) [poly(NIPA-co-AAc)] to elucidate the mechanism of temperature-induced phase separation ... -
Kinetic models for the dynamical behavior of polyacrylamide (PAAm)-kappa-carrageenan (kappa C) composite gels
Evingür, Gülşen Akın; Pekcan, Önder (Springer, 2015)A fluorescence method was employed for studying the drying and swelling of PAAm-kappa C composite gels, which were formed from acrylamide (AAm) and N, N'- methylenebisacrylamide (BIS) with various kappa-carrageenan (kappa ... -
Kinetics models for polyacrylamide-graphene oxide composites as antifoulant
Osma, Büşra; Pekcan, Önder; Akın Evingür, Gülşen (John Wiley and Sons Inc, 2022)Antifouling paints are used to protect the surface against these organisms such as algae, sea squirts, and barnacles. According to previous research, fish and seaweeds do not adhere to submerged surfaces using wet and soft ...
