Results 151 to 160 of about 10,074 (199)

Adsorption of poly(N-isopropylacrylamide) on glass substrata

Journal of Colloid and Interface Science, 2004
The adsorption of poly(N-isopropylacrylamide) (PNIPAAM), a well known thermosensitive polymer, on glass was investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The polymer was dissolved in water at low (0.02 g/L) and high (2 g/L) concentration and the tested temperatures were below (25 degrees C) and above (50 ...
Callewaert, M., Grandfils, Christian, Boulange-Petermann, L., Rouxhet, P. G.   +3 more
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Synthesis and properties of poly (N-isopropylacrylamide) and poly (N-isopropylacrylamide-co-acrylamide) hydrogels

Journal of Shanghai University (English Edition), 2005
The thermosensitive poly (N-isopropylacrylamide) (PNIPAAm) and poly (N-isopropylacrylamide-co-acrylamide) [poly (NIPAAm-co-AAm)] hydrogels with different acrylamide molar percentage are prepared by radiation polymerization using Co60 γ-ray. Their swelling equilibrium data in the media of deionized water, NaCl aqueous solutions and different pH buffer ...
Yong Pei, Jie Chen, Li-ming Yang, Li-li Shi, Hao-jie Luo   +4 more
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Cytotoxic evaluation of N-isopropylacrylamide monomers and temperature-sensitive poly(N-isopropylacrylamide) nanoparticles

Journal of Nanoparticle Research, 2008
The objective of this research project is to investigate the biocompatibility of N-isopropylacrylamide (NIPAAm) monomers and poly(N-isopropylacrylamide) (PNIPAAm) nanoparticles in vitro. PNIPAAm nanoparticles of different sizes were synthesized and characterized by transmission electron microscopy and dynamic light scattering.
Aniket S. Wadajkar, Bhanuprasanth Koppolu, Maham Rahimi, Kytai T. Nguyen   +3 more
openaire   +1 more source

Perturbation on dynamics of ferroin-catalyzed Belousov–Zhabotinsky reaction by monomer N-isopropylacrylamide and poly(N-isopropylacrylamide)

Polymer Bulletin, 2021
The present study pertains to the study of ferroin-catalyzed Belousov–Zhabotinsky (BZ) oscillatory chemical reaction having catechol as an organic substrate in aqueous acid media at 30 ± 0.1 °C under stirred batch conditions. The above system shows oscillations within narrow range of concentration of initial reagents which was monitored ...
Shafia Lateef, Nadeem Bashir Ganaie, Ghulam Mustafa Peerzada   +2 more
openaire   +1 more source

Swelling kinetics of poly(N-isopropylacrylamide) gel

Journal of Controlled Release, 1998
In many gel applications the swelling and shrinking kinetics are very important, e.g. in controlled/slow release, where the kinetics determined the rate of out-diffusion of the active component, and in gel extraction where the gel is swollen and shrunk several times.
M, Andersson, A, Axelsson, G, Zacchi
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Characterization of Poly(N-isopropylacrylamide) and Magnetic Poly(N-isopropylacrylamide) Latexes

2009
Monodisperse poly(N-isopropylacrylamide) (PNIPA) nanogel latexes with temperature and magnetic field sensitivity were prepared and characterized. The phase transition of the latex was characterized by dynamic light scattering. Electrokinetic measurements revealed that the particles have a negative surface charge, which depends on the pH of the swelling
Árpád Némethy, András Szilágyi, Genovéva Filipcsei, Etelka Tombácz, Miklós Zrínyi   +4 more
openaire   +1 more source

The viscosity of dilute poly(N-isopropylacrylamide) dispersions

Journal of Colloid and Interface Science, 2011
The viscosity of dilute aqueous dispersions of poly(N-isopropylacrylamide) microgel particles is measured by capillary viscometry. The viscosity increases with particle mass fraction and on reducing temperature, particularly below the volume phase transition temperature (VPTT) of 32 °C.
Anya J, Howe, Andrew M, Howe, Alexander F, Routh   +2 more
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Aggregation behavior of poly(N-isopropylacrylamide) microspheres

Colloids and Surfaces B: Biointerfaces, 2001
Electrophoretic mobility and aggregation in suspensions of three types of microspheres (Ms 1, Ms 2 and Ms 3) are studied at different pH, ionic strengths and temperatures of the medium. Here Ms 1 is a core particle composed of poly(N-isopropylacrylamide-co-styrene). Ms 2 is a core-shell microsphere consisting of Ms 1 as the particle core covered with a
K, Makino, H, Kado, H, Ohshima
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Adsorption of fluorophores and N-isopropylacrylamide on Laponite

Applied Clay Science, 2012
Abstract The adsorption of fluorophores on Laponite XLS particles was derived from the fluorescence spectra and UV absorbance after separating the particles from the dispersion by centrifugation. Addition of N -isopropylacrylamide (NIPAm) to the fluorophore/Laponite XLS dispersion enhanced the excimer emission with appearance of the static excimer ...
Tao Wang, Xiaobo Hu, Shudian Zheng, Xinxing Liu, Chaoyang Wang, Zhen Tong   +5 more
openaire   +1 more source

Preparation of aqueous latices with N-isopropylacrylamide

Colloids and Surfaces, 1986
The preparation and characterization of monodisperse aqueous latex dispersions prepared from mixtures of N-isopropylacrylamide (NIPAM), acrylamide and N,N′-methylenebisacrylamide are described. Latices were prepared with solid contents up to 2.5%; the maximum acrylamide concentration which gave a good latex was about 1%. Absorbance (i.e.
R.H. Pelton, P. Chibante
openaire   +1 more source