Surface properties of Ti-6Al-4V alloy part I: Surface roughness and apparent surface free energy

2017 ◽  
Vol 70 ◽  
pp. 207-215 ◽  
Author(s):  
Yingdi Yan ◽  
Emil Chibowski ◽  
Aleksandra Szcześ
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Surface Properties ◽  
Surface Free Energy ◽  
Alloy Part

scholarly journals Apparent Surface Free Energy of Polymer/Paper Composite Material Treated by Air Plasma

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Konrad Terpiłowski
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Plasma Treatment ◽  
Surface Properties ◽  
Surface Free Energy ◽  
Photoelectron Spectroscopy ◽  
Contact Angles ◽  
Air Plasma ◽  
Surface Plasma ◽  
Composite Surface

Surface plasma treatment consists in changes of surface properties without changing internal properties. In this paper composite polymer/paper material is used for production of packaging in cosmetic industry. There are problems with bonding this material at the time of packaging production due to its properties. Composite surface was treated by air plasma for 1, 10, 20, and 30 s. The advancing and receding contact angles of water, formamide, and diiodomethane were measured using both treated and untreated samples. Apparent surface free energy was estimated using the hysteresis (CAH) and Van Oss, Good, Chaudhury approaches (LWAB). Surface roughness was investigated using optical profilometry and identification of after plasma treatment emerging chemical groups was made by means of the XPS (X-ray photoelectron spectroscopy) technique. After plasma treatment the values of contact angles decreased which is particularly evident for polar liquids. Apparent surface free energy increased compared to that of untreated samples. Changes of energy value are due to the electron-donor parameter of energy. This parameter increases as a result of adding polar groups at the time of surface plasma activation. Changes of surface properties are combination of increase of polar chemical functional groups, increase on the surface, and surface roughness increase.

Bioactive nanocomposites of bacterial cellulose and natural hydrocolloids

2014 ◽  
Vol 2 (40) ◽  
pp. 7034-7044 ◽  
Author(s):  
Marco Aurelio Woehl ◽  
Lucy Ono ◽  
Izabel Cristina Riegel Vidotti ◽  
Fernando Wypych ◽  
Wido Herwig Schreiner ◽  
...  
Keyword(s):  
Free Energy ◽  
Cell Growth ◽  
Bacterial Cellulose ◽  
Surface Properties ◽  
Surface Free Energy ◽  
Growth Substrates

Bacterial cellulose–natural hydrocolloid bionanocomposites were developed as cell growth substrates. The surface free energy of the composites is related to fibroblast viability. Surface properties of the bionanocomposites can be adjusted purely by changing the component proportions.

The influence of surface free energy and surface roughness on early plaque formation. An in vivo study in man

1990 ◽  
Vol 17 (3) ◽  
pp. 138-144 ◽  
Author(s):  
M. Quirynen ◽  
M. Marechal ◽  
H. J. Busscher ◽  
A. H. Weerkamp ◽  
P. L. Darius ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Surface Free Energy ◽  
Plaque Formation ◽  
In Vivo Study

scholarly journals The Interaction of Osteoblasts With Bone-Implant Materials: 1. The Effect of Physicochemical Surface Properties of Implant Materials

2011 ◽  
pp. 95-111 ◽  
Author(s):  
D. KUBIES ◽  
L. HIMMLOVÁ ◽  
T. RIEDEL ◽  
E. CHÁNOVÁ ◽  
K. BALÍK ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Blood Coagulation ◽  
Surface Free Energy ◽  
Blood Clot ◽  
Surface Treatments ◽  
Clot Formation ◽  
Osteoblast Proliferation ◽  
Human Osteoblasts ◽  
Implant Materials

This comparative study of various surface treatments of commercially available implant materials is intended as guidance for orientation among particular surface treatment methods in term of the cell reaction of normal human osteoblasts and blood coagulation. The influence of physicochemical surface parameters such as roughness, surface free energy and wettability on the response of human osteoblasts in the immediate vicinity of implants and on the blood coagulation was studied. The osteoblast proliferation was monitored and the expression of tissue mediators (TNF-α, IL-8, MMP-1, bone alkaline phosphatase, VCAM-1, TGF-β) was evaluated after the cell cultivation onto a wide range of commercially available materials (titanium and Ti6Al4V alloy with various surface treatments, CrCoMo alloy, zirconium oxide ceramics, polyethylene and carbon/carbon composite). The formation of a blood clot was investigated on the samples immersed in a freshly drawn whole rabbit blood using scanning electron microscope. The surfaces with an increased osteoblast proliferation exhibited particularly higher surface roughness (here Ra > 3.5 µm) followed by a high polar part of the surface free energy whereas the effect of wettability played a minor role. The surface roughness was also the main factor regulating the blood coagulation. The blood clot formation analysis showed a rapid coagulum formation on the rough titanium-based surfaces. The titanium with an etching treatment was considered as the most suitable candidate for healing into the bone tissue due to high osteoblast proliferation, the highest production of osteogenesis markers and low production of inflammatory cytokines and due to the most intensive blood clot formation.

The influence of surface free energy and surface roughness on early plaque formation.

1992 ◽  
Vol 17 (3) ◽  
pp. 138-144 ◽  
Author(s):  
M. Quirynen ◽  
M. Marechal ◽  
H. J. Busscher ◽  
A. H. Weerkamp ◽  
P. L. Darius ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Surface Free Energy ◽  
Plaque Formation

The bacterial colonization of intra‐oral hard surfacesin vivo:Influence of surface free energy and surface roughness

Biofouling ◽  
1991 ◽  
Vol 4 (1-3) ◽  
pp. 187-198 ◽  
Author(s):  
M Quirynen ◽  
M Marechal ◽  
D Van Steenberghe ◽  
H J Busscher ◽  
H C Van Der Mei
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Surface Free Energy ◽  
Bacterial Colonization

scholarly journals Measurements of surface free energy as a tool to asses the effect of varnishing and printing of the paper substrates

2020 ◽  
Author(s):  
Zuzanna Żołek-Tryznowska ◽  
◽  
Marta Więcek ◽  
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Water Contact Angle ◽  
Water Contact ◽  
Human Eye ◽  
Varnish Layer ◽  
Energy Determination ◽  
Paper Substrates

Nowadays, printing products might be finished in various ways. Varnishing process is one of the most popular finishing method which gives various effect, such as mate, glossy etc. However, the varnish layer applied on the paper is very thin, therefore it can be invisible to the naked human eye. The aim of this work was to use contact angle measurement and surface free energy determination as a tool to assess the effect of printing and varnishing process of paper materials. We have used various tools in order to analyses the changes of surface: surface roughness, gloss, water contact angle absorption and surface free energy determination. Those tools were used in order to confirm whether the print has been covered with varnish or not. In this work six various paper substrates were used (glossy, coated and un-coated papers). The printing and varnishing was performed in laboratory conditions using flexographic water-based printing and waterbased varnish. Samples were prepared as follows: paper with ink coating, paper with varnish coating and paper with ink layer and varnish layer on the top. The surface roughness was determinated of all samples and compared. The surface roughness changes were observed for pure paper, overprinted and overvarnished. Next, the gloss of samples prior and after printing and varnishing was measured. The gloss of the samples increases when they are printed or varnished, what is related with properties of ink and varnish. Also, the thickness of ink and varnish layers was determinated. The thickness of the samples increases when the number of layers increases. Finally, the water contact angle was measured and surface free energy was calculated with Owens-Wendt method. Our results reveal the possibility of using various tools in order to confirm the performance of varnishing of the prints. The printing with various colors is always seen by the naked human eye. On the other hand, the varnish layer might be not visible. However, such a comparison is not possible if we do not have the pure paper substrates prior printing or varnish.

scholarly journals THE EFFECT OF NON-POLYMERIC COMPONENTS OF A RUBBER MIXTURE ON SURFACE PROPERTIES OF ELASTOMER COMPOSITIONS

2018 ◽  
Vol 13 (5) ◽  
pp. 67-72 ◽  
Author(s):  
A. D. Tarasenko ◽  
O. A. Dulina ◽  
A. M. Bukanov
Keyword(s):  
Free Energy ◽  
Surface Energy ◽  
Surface Properties ◽  
Surface Free Energy ◽  
Quantitative Characteristic ◽  
Solubility Limit ◽  
Solution Polymerization ◽  
Rubber Mixture ◽  
Rubber Compounds ◽  
Butadiene Styrene

The effect of non-polymeric components of a rubber mixture on the surface properties of butadienestyrene rubber obtained by solution polymerization was studied in the article. As non-polymeric components, ingredients widely used in the practice of the rubber industry were introduced into the rubber: fillers, surfactants of various types, and also sulfur - as a vulcanization agent. The surface free energy of the samples, a quantitative characteristic of the surface properties, was determined using the Owens-Wendt-Rabel-Kaelble method. It has been found that the surface properties of elastomeric compositions depend significantly on the solubility of the ingredients of the rubber composition and their adsorption properties. It has been shown that the most significant influence on the surface energy of butadiene-styrene rubber is exerted by the filler, on the surface of which rubber adsorption does not occur. The effect of surfactants on the surface energy of rubber compounds is different and depends on the nature of the surfactant. A partially soluble component - sulfur - in small quantities does not affect the surface energy of rubber samples. However, if it is present in the system in quantities greater than the solubility limit, it significantly reduces the surface free energy of the samples.

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