Influences of tantalum pentoxide and surface coarsening on surface roughness, hydrophilicity, surface energy, protein adsorption and cell responses to PEEK based biocomposite

ABSTRACTIn the present work, the adsorption of albumin and fibrinogen on Ta, Nb, Ti and Zr oxidesthin films deposited on Si (100) wafers by magnetron sputtering was studied in order to get a better understanding of the correlation among the surface properties of these oxides and the protein adsorption phenomena on their surfaces. The surface energy, hydrophobicity, chemical composition, roughness and atomic order of the films were characterized. The films were immersedfor 45 minutes in single protein solutions; either albumin or fibrinogenand the adsorbed protein layer on the films was studied ex-situ in a dry ambient using bothX-ray photoelectron spectroscopy and atomic force microscopy.The adsorption of albumin and fibrinogen on the films modified the surface morphology and decreased the surface roughness for all the four different metal oxides. The XPS results confirmed the presence of the protein on the surface of the films and showed that the two proteins studied were adsorbed without undergoing a major chemical decomposition. A correlation between the surface roughness,the polar component of the surface energy of the films and the atomic percentage of nitrogen on the films after protein adsorption, an indirect signal of the amount of protein adsorbed, was found for albumin and fibrinogen adsorption on Ta, Nb and Ti oxides; the largest the roughness or the polar component the largest amount of adsorbed protein.

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A new method for quantifying the blocking of coated paperboard

TAPPI Journal ◽

10.32964/tj9.5.29 ◽

2010 ◽

Vol 9 (5) ◽

pp. 29-35 ◽

Cited By ~ 2

Author(s):

PAULINE SKILLINGTON ◽

YOLANDE R. SCHOEMAN ◽

VALESKA CLOETE ◽

PATRICE C. HARTMANN

Keyword(s):

Surface Roughness ◽

Fatty Acid ◽

Surface Energy ◽

Film Thickness ◽

External Factors ◽

Additive Concentration ◽

Pressure Surface ◽

Fatty Acid Amides ◽

Coated Surfaces ◽

Definite Period

Blocking is undesired adhesion between two surfaces when subjected to pressure and temperature constraints. Blocking between two coated paperboards in contact with each other may be caused by inter-diffusion, adsorption, or electrostatic forces occurring between the respective coating surfaces. These interactions are influenced by factors such as the temperature, pressure, surface roughness, and surface energy. Blocking potentially can be reduced by adjusting these factors, or by using antiblocking additives such as talc, amorphous silica, fatty acid amides, or polymeric waxes. We developed a method of quantifying blocking using a rheometer. Coated surfaces were put in contact with each other with controlled pressure and temperature for a definite period. We then measured the work necessary to pull the two surfaces apart. This was a reproducible way to accurately quantify blocking. The method was applied to determine the effect external factors have on the blocking tendency of coated paperboards, i.e., antiblocking additive concentration, film thickness, temperature, and humidity.

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J111022 Changes of Surface Roughness and Surface Energy of Glass Surfaces with Gas Cluster Ion Beam Treatment

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2011._j111022-1 ◽

2011 ◽

Vol 2011 (0) ◽

pp. _J111022-1-_J111022-3

Author(s):

Katsuya NAMBA ◽

Hiroyuki SAKAKIBARA ◽

Hedong ZHANG ◽

Yasunaga MITSUYA ◽

Kenji FUKUZAWA ◽

...

Keyword(s):

Surface Roughness ◽

Surface Energy ◽

Ion Beam ◽

Ion Beam Treatment ◽

Cluster Ion ◽

Gas Cluster Ion Beam ◽

Glass Surfaces

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Addition of Cellulose Nanofibers to Control Surface Roughness for Hydrophobic Ceramic Coatings

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19430 ◽

2021 ◽

Vol 21 (8) ◽

pp. 4492-4497

Author(s):

Eun Ae Shin ◽

Gye Hyeon Kim ◽

Jeyoung Jung ◽

Sang Bong Lee ◽

Chang Kee Lee

Keyword(s):

Surface Roughness ◽

Contact Angle ◽

Surface Energy ◽

Water Contact Angle ◽

Ceramic Coating ◽

Cellulose Nanofibers ◽

Ceramic Coatings ◽

Coating Material ◽

Textured Surface ◽

Water Contact

Hydrophobic ceramic coatings are used for a variety of applications. Generally, hydrophobic coating surfaces are obtained by reducing the surface energy of the coating material or by forming a highly textured surface. Reducing the surface energy of the coating material requires additional costs and processing and changes the surface properties of the ceramic coating. In this study, we introduce a simple method to improve the hydrophobicity of ceramic coatings by implementing a textured surface without chemical modification of the surface. The ceramic coating solution was first prepared by adding cellulose nanofibers (CNFs) and then applied to a polypropylene (PP) substrate. The surface roughness increased as the amount of added CNFs increased, increasing the water contact angle of the surface. When the amount of CNFs added was corresponding to 10% of the solid content, the surface roughness average of the area was 43.8 μm. This is an increase of approximately 140% from 3.1 μm (the value of the surface roughness of the surface without added CNFs). In addition, the water contact angle of the coating with added CNF increased to 145.0°, which was 46% higher than that without the CNFs. The hydrophobicity of ceramic coatings with added CNFs was better because of changes in the surface topography. After coating and drying, the CNFs randomly accumulated inside the ceramic coating layer, forming a textured surface. Thus, hydrophobicity was improved by implementing a rugged ceramic surface without revealing the surface of the CNFs inside the ceramic layer.

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A note on the effect of surface topography on adhesion of hard elastic rough bodies with low surface energy

Journal of the Mechanical Behavior of Materials ◽

10.1515/jmbm-2019-0002 ◽

2019 ◽

Vol 28 (1) ◽

pp. 8-12 ◽

Cited By ~ 6

Author(s):

Guido Violano ◽

Giuseppe Demelio ◽

Luciano Afferrante

Keyword(s):

Surface Roughness ◽

Surface Energy ◽

Adhesive Contact ◽

Low Surface Energy ◽

Surface Gradient ◽

Self Consistent ◽

Remarkable Result ◽

Roughness Amplitude ◽

Adhesive Interactions ◽

Effect Of Surface

AbstractAdhesion between bodies is strongly influenced by surface roughness. In this note, we try to clarify how the statistical properties of the contacting surfaces affect the adhesion under the assumption of long-range adhesive interactions.Specifically, we show that the adhesive interactions are influenced only by the roughness amplitude hrms, while the rms surface gradient h0rmsonly affects the non-adhesive contact force. This is a remarkable result if one takes into account the intrinsic difficulty in defining $h_{\mathrm{rms}}^{^{\prime }}.$Results are also corroborated by a comparison with self-consistent numerical calculations.

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Preparation of Hydrophobic Nylon Fabric

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892501601100106 ◽

2016 ◽

Vol 11 (1) ◽

pp. 155892501601100

Author(s):

Jinmei Du ◽

Lulu Zhang ◽

Jing Dong ◽

Ying Li ◽

Changhai Xu ◽

...

Keyword(s):

Surface Roughness ◽

Contact Angle ◽

Surface Energy ◽

Water Contact Angle ◽

Sem Images ◽

Water Contact ◽

Carboxyl Content ◽

Factors Affecting ◽

Nylon Fabric ◽

Butanetetracarboxylic Acid

Surface roughness and surface energy are two important factors affecting the hydrophobicity of nylon fabric. In this study, nylon fabric was treated for hydrophobicity with tetrabutyltitanate (TBT) and octadecylamine (OA) which were respectively responsible for increasing surface roughness and reducing surface energy. In order to enhance the hydrophobicity, In order to further enhance hydrophobicity by increasing available reactive sites, 1,2,3,4–butanetetracarboxylic acid (BTCA) was applied as a pretreatment to the nylon fabric It was found that the carboxyl content of nylon was increased by the BTCA pretreatment. SEM images showed that the TBT treatment produced small particles on nylon fabric which made surface rough. The water contact angle of nylon fabric treated with BTCA, TBT and OA was measured to be 134°, which was much greater than the water contact angle of nylon fabric treated only with OA. This indicated that the surface roughness resulting from the TBT treatment played an important role in improving hydrophobicity of the treated nylon fabric. The resistance to water penetration and the repellency of water spray of nylon fabric treated with BTCA, TBT and OA were respectively measured to be 27.64 mbar and 85 out of 100.

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Roughness and wettability of aligner materials

Journal of Orthodontics ◽

10.1177/1465312520936702 ◽

2020 ◽

Vol 47 (3) ◽

pp. 223-231 ◽

Cited By ~ 2

Author(s):

Fabienne Suter ◽

Spiros Zinelis ◽

Raphael Patcas ◽

Marc Schätzle ◽

George Eliades ◽

...

Keyword(s):

Surface Roughness ◽

Surface Energy ◽

Work Of Adhesion ◽

Critical Surface ◽

Roughness Parameters ◽

Critical Surface Tension ◽

Energy Parameters ◽

Intermediate Group ◽

Significant Difference

Objective: The characterisation of surface roughness and energy of contemporary thermoplastic materials used in manufacturing of orthodontic aligners. Design: In vitro, laboratory study. Materials and methods: Four commercially available thermoplastic materials were selected (CA-medium/CAM, Essix-copopyester/COP, Duran/DUR and Erkodur/ERK). Five disks from each, as received, material were tested and subjected to: (1) reflected light microscopy; (2) optical profilometry for the estimation of Sa, Sz, Sq, Sdr, Sc, Sv surface roughness parameters (n = 5); and (3) contact angle measurements with a Zisman series of liquids for the estimation of critical surface tension (γC), total work of adhesion (WA), as well as the work of adhesion due to polar (WP) and dispersion (WD) components employing the Zisman method (n = 5/liquid). Thermoformed disks were prepared against a dental stone model and the roughness parameters were calculated again Statistical analysis was performed by one-way ANOVA/ Tukey multiple comparison test and t-test (a = 0.05). Results: Microscopic and profilometric analyses revealed a smooth surface texture in the as-received materials, but a very rough texture after thermoforming, with insignificant differences within each state. Significant differences in the as-received state were found in the surface energy parameters; CAM showed the lowest γC and the highest WA, WP, WD, whereas ERK with the highest γC demonstrated lower WA. COP and DUR were ranked in an intermediate group regarding γC, with a statistically significant difference in WA between them, mainly attributed to the lower WP of the former. Conclusion: Given the differences in surface energy parameters and the lack of roughness differences within the as received or thermoformed groups, it may be concluded that variations in the plaque retaining capacity are anticipated, determined by γC, WA and the WP, WD components.

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