Estimation of the Surface Properties of Styrene-Acrylonitrile Random Copolymers from Contact Angle Measurements

1999 ◽  
Vol 217 (1) ◽  
pp. 94-106 ◽  
Author(s):  
Maria Helena Ventura Cabral Adão ◽  
Benilde Jesus Vieira Saramago ◽  
Anabela Catarino Fernandes
Keyword(s):  
Contact Angle ◽  
Surface Properties ◽  
Random Copolymers ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Styrene Acrylonitrile

Surface Properties of Whey Protein Gels

2019 ◽  
Vol 41 (6) ◽  
pp. 956-956
Author(s):  
Salvador Perez Huertas Salvador Perez Huertas ◽  
Konrad Terpi owski and Marta Tomczy ska Mleko Konrad Terpi owski and Marta Tomczy ska Mleko
Keyword(s):  
Contact Angle ◽  
Whey Protein ◽  
Surface Properties ◽  
Human Organism ◽  
New Methods ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Optical Profilometer ◽  
Protein Gels ◽  
Microscopic Techniques

Surface properties of whey protein gels are reviewed based on traditional microscopic techniques and new methods, as optical profilometer and contact angle measurements. Optical profilometer is an instrument allowing measurement of surface roughness and contact angle measurements to determine the surface wettability behavior (hydrophobicity/hydrophilicity) of the gels. Investigation of surface properties of whey protein gels is very important, as it can transform this product to a new level of application. It could be used as a matrix for an active ingredient release, material for tissue engineering, e.g. scaffolds, i.e. temporally structures biodegraded in the human organism.

Tuning the Surface Properties of Elastomers Using Hydrocarbon-Based Mechanically Assembled Monolayers

2001 ◽  
Vol 710 ◽  
Author(s):  
Kirill Efimenko ◽  
Jan Genzer
Keyword(s):  
Contact Angle ◽  
Fine Structure ◽  
Surface Structure ◽  
Surface Properties ◽  
Molecular Orientation ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Assembled Monolayers ◽  
Excellent Stability

ABSTRACTWe use static contact angle measurements and near-edge absorption fine structure to elucidate the surface structure and molecular orientation of hydrocarbon-based mechanically assembled monolayers (H-MAMs), structures formed by combination of assembly of alkyl moieties onto flexible elastomeric substrates and mechanical manipulation of the substrates. Specifically, we report that the organization of the grafted molecular array (“liquid”-like vs. solid-like) can be tailored by varying the degree of stretching of the elastomeric substrate. We also show that the H-MAM surfaces exhibit excellent stability.

Cell Surface and Aggregation Studies of Microbes from Anaerobic Systems

1987 ◽  
Vol 22 (2) ◽  
pp. 289-297 ◽  
Author(s):  
N. Kosaric ◽  
E.M. Mahoney ◽  
L.K. Varangu ◽  
W.L. Cairns
Keyword(s):  
Contact Angle ◽  
Anaerobic Digestion ◽  
Zeta Potential ◽  
Cell Surface ◽  
Surface Properties ◽  
Experimental Conditions ◽  
Cell Surface Properties ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Engineering Parameters

Abstract Studies were performed to evaluate cell surface properties of aggregated microbial granules from anaerobic digestion systems. Cell surface properties (hydrophobicity/hydrophilicity) were obtained by contact angle measurements in an aqueous phase. The cells’ charges were evaluated by measuring zeta potential and settlability was used as a measure of aggregating of cells under various experimental conditions. Flocculation tests have shown to be a good indicator of aggregation ability between cells. Aggregation can be modulated by changing those environmental and engineering parameters which can be measured by contact angle and zeta potential.

Investigation of treated PEN foil surface properties for inkjet application

2015 ◽  
Vol 27 (3) ◽  
pp. 108-111
Author(s):  
Aneta Araźna ◽  
Konrad Futera ◽  
Małgorzata Jakubowska ◽  
Łucja Dybowska-Sarapuk
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Glow Discharge ◽  
Surface Properties ◽  
Contact Angles ◽  
Polyethylene Naphthalate ◽  
Content Type ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Afm Micrographs

Purpose – The purpose of this paper is to report surface properties of treated Teonex Du Pont polyethylene naphthalate (PEN) foil substrates. Design/methodology/approach – There were three different cleaning treatments among other: argon glow discharge, dipping into alkaline solution at 60°C as well as washing in an ultrasonic bath of acetone and ethyl alcohol in room temperature. The relation between PEN foil morphology and surface properties has been studied by contact angle measurements as well as evaluation of surface roughness of PEN foil samples by atomic force microscopy (AFM). Findings – It was found that argon glow discharge (T3) of PEN treatment caused the maximum reduction in both values of contact angles. In addition, the argon glow discharge yielded the highest PEN surface energy (51.9 mJ/m2) and polarity (0.89). On the other hand, the AFM micrographs showed that the samples T3 had the highest value of average and root mean square surface roughness. Based on the experiments results, the authors stated that the alkaline cleaning (T2 treatment) could be considered as an effective method of PEN substrate treatment. Originality/value – The influence of different cleaning treatment on the surface properties of PEN foil to inkjet application was analyzed. In the literature, there are not a lot of papers describing examinations of surface properties of PEN foil to inkjet application by contact angle measurements and AFM analysis.

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