scholarly journals Cytocompatibility of Plasma and Thermally Treated Biopolymers

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Petr Slepička ◽  
Iva Michaljaničová ◽  
Nikola Slepičková Kasálková ◽  
Petr Sajdl ◽  
Zdeňka Kolská ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Cell Adhesion ◽  
Plasma Treatment ◽  
Surface Characterization ◽  
Polymer Surface ◽  
Biocompatible Polymers ◽  
Surface Polarity ◽  
Cell Adhesion And Proliferation ◽  
Thermally Treated

This paper is focused on the surface characterization of plasma and consequently thermally treated biocompatible polymers. PLLA (poly(L-lactide acid) and PMP (poly-4-methyl-1-pentene) are studied. The influence of Ar plasma treatment on the surface polarity of substrate measured immediately after treatment and during the polymer surface aging is studied. Surface roughness, morphology, wettability, and surface chemistry were determined. Plasma treatment leads to significant changes in PLLA surface morphology and chemistry, with the PMP being slightly affected. The higher resistance to plasma fluence results in smaller ablation of PMP than that of PLLA. The plasma treatment improves cell adhesion and proliferation on the PMP. Plasma treatment of PLLA influences mostly the homogeneity of adhered and proliferated VSMC.

scholarly journals Polymer surface functionalities that control human embryoid body cell adhesion revealed by high throughput surface characterization of combinatorial material microarrays

Biomaterials ◽  
2010 ◽  
Vol 31 (34) ◽  
pp. 8827-8838 ◽  
Author(s):  
Jing Yang ◽  
Ying Mei ◽  
Andrew L. Hook ◽  
Michael Taylor ◽  
Andrew J. Urquhart ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
High Throughput ◽  
Surface Characterization ◽  
Embryoid Body ◽  
Polymer Surface ◽  
Body Cell

scholarly journals Post-Processing and Surface Characterization of Additively Manufactured Stainless Steel 316L Lattice: Implications for BioMedical Use

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1376
Author(s):  
Alex Quok An Teo ◽  
Lina Yan ◽  
Akshay Chaudhari ◽  
Gavin Kane O’Neill
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Surface Characterization ◽  
High Surface ◽  
Surface Characteristics ◽  
Post Processing ◽  
Stainless Steel 316L ◽  
Processing Methods ◽  
Particulate Debris

Additive manufacturing of stainless steel is becoming increasingly accessible, allowing for the customisation of structure and surface characteristics; there is little guidance for the post-processing of these metals. We carried out this study to ascertain the effects of various combinations of post-processing methods on the surface of an additively manufactured stainless steel 316L lattice. We also characterized the nature of residual surface particles found after these processes via energy-dispersive X-ray spectroscopy. Finally, we measured the surface roughness of the post-processing lattices via digital microscopy. The native lattices had a predictably high surface roughness from partially molten particles. Sandblasting effectively removed this but damaged the surface, introducing a peel-off layer, as well as leaving surface residue from the glass beads used. The addition of either abrasive polishing or electropolishing removed the peel-off layer but introduced other surface deficiencies making it more susceptible to corrosion. Finally, when electropolishing was performed after the above processes, there was a significant reduction in residual surface particles. The constitution of the particulate debris as well as the lattice surface roughness following each post-processing method varied, with potential implications for clinical use. The work provides a good base for future development of post-processing methods for additively manufactured stainless steel.

Tubing String Thread Sealing Surfaces Damage Evaluation Based on Acoustic Elasticity Theory

2019 ◽  
Vol 944 ◽  
pp. 828-834 ◽  
Author(s):  
Jian Jun Wang ◽  
Jian Hua Sun ◽  
Shang Yu Yang ◽  
Yao Rong Feng ◽  
Kai Lin
Keyword(s):  
Surface Roughness ◽  
Elasticity Theory ◽  
Contact Stress ◽  
Surface Characterization ◽  
Surface Damage ◽  
Center Frequency ◽  
Sealing Performance ◽  
Tubing String ◽  
Acoustic Elasticity

During the processing of tubing premium threaded made up, the degree of the thread sealing surface intactness will directly affect the sealing performance of the string. Nevertheless, there are some difficulties to detect the damage of the engaged sealing surface effectively. In the present study the sealing surface damage was judged by the sealing surface contact stress’s relative changes according to the acoustic elasticity theory,. At the same time, the wear defects generated at the tubing sealing surface, during the tubing made up, contrasted with the wear and unworn surface roughness of coupling ultrasonic detected about the sealing surface. The results showed that with the acoustic amplitude evaluated the sealing contact stress was susceptible to the influence of surface roughness of coupling. But the reflection wave with the center frequency on the sealing surface characterization of the contact stress could avoid this problem effectively.

Hydrophobization of silk fibroin nanofibrous membranes by fluorocarbon plasma treatment to modulate cell adhesion and proliferation behavior

2014 ◽  
Vol 22 (7) ◽  
pp. 746-752 ◽  
Author(s):  
Minyoung Lee ◽  
Young-Gwang Ko ◽  
Jae Baek Lee ◽  
Won Ho Park ◽  
Donghwan Cho ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Plasma Treatment ◽  
Silk Fibroin ◽  
Fluorocarbon Plasma ◽  
Nanofibrous Membranes ◽  
Cell Adhesion And Proliferation

Surface characterization of cell adhesion controlled polymer modified by ion bombardment

1996 ◽  
Vol 100-101 ◽  
pp. 112-115 ◽  
Author(s):  
A. Nakao ◽  
M. Kaibara ◽  
M. Iwaki ◽  
Y. Suzuki ◽  
M. Kusakabe
Keyword(s):  
Cell Adhesion ◽  
Surface Characterization ◽  
Ion Bombardment

Photocontrol of Cell Adhesion and Proliferation by a Photoinduced Cationic Polymer Surface¶

2003 ◽  
Vol 77 (5) ◽  
pp. 480 ◽  
Author(s):  
Yasuhide Nakayama ◽  
Akiko Furumoto ◽  
Satoru Kidoaki ◽  
Takehisa Matsuda
Keyword(s):  
Cell Adhesion ◽  
Polymer Surface ◽  
Cationic Polymer ◽  
Cell Adhesion And Proliferation

scholarly journals Simplified micrometric surface characterization of different implant surfaces available on the Brazilian market

2018 ◽  
Vol 17 ◽  
pp. 1-9
Author(s):  
Luiz Carlos do Carmo Filho ◽  
Ana Paula Pinto Martins ◽  
Amália Machado Bielemann ◽  
Anna Paula da Rosa Possebon ◽  
Fernanda Faot
Keyword(s):  
Surface Roughness ◽  
Chemical Composition ◽  
Surface Treatment ◽  
Rough Surface ◽  
Surface Characterization ◽  
Implant Surface ◽  
Treatment Techniques ◽  
Surface Contaminants ◽  
Cervical Portion

Aim: This study characterized the implant surfaces available on the Brazilian market in terms of topography, chemical composition, and roughness. Methods: The following brands were selected according to their surfaces: Kopp (Ko), Signo Vinces (Sv), Neodent (Ne), Osseotite (Os) NanoTite (Nt), SIN (Si), Titanium Fix (Tf), conventional Straumann (Str), Active SLA (SLA). The morphological analysis and the alloy impurities and implant surface contaminants were analyzed by SEM-EDS. Surface roughness parameters and 3-D reconstructions were obtained by laser microscopy (20x). Two distinct areas were evaluated: i) the cervical portion (no surface treatment), and ii) the middle third (treated surface). Results: The characterization of the implant surfaces by SEM showed morphological differences between the thread geometries and surface morphology at 800x and 2000x magnification. The EDS elemental analysis showed a predominance of titanium (Ti) for all implants. The SLA surface showed only peaks of Ti while other implants brands showed traces of impurities and contaminants including Al, C, PR, F, Mg, Na, Ni, O, P, and SR. The implant surface roughness in the cervical portion did not exceed Ra 0.5–1.0 μm, constituting a minimally rough surface and obtaining acceptable standards for this region. Only Nt, Str, and SLA presented Ra above 2 μm in the middle third area showing a rough surface favorable for osseointegration. Conclusion: This study concluded that there is no established standard for morphology, chemical composition and implant surface roughness that allows a safe comparison between the available dental implant surfaces. National implant brands generally contain more impurities and surface contaminants than their international counterparts and were consequently more sensitive to the surface treatment techniques.

Surface characterization of microporous polypropylene membranes modified by plasma treatment

Polymer ◽  
2001 ◽  
Vol 42 (18) ◽  
pp. 7879-7885 ◽  
Author(s):  
B Bae ◽  
B.-H Chun ◽  
D Kim
Keyword(s):  
Plasma Treatment ◽  
Surface Characterization

Surface characterization of carbon surfaces by cold plasma treatment

Carbon ◽  
1994 ◽  
Vol 32 (1) ◽  
pp. 177-181 ◽  
Author(s):  
T. Ohte ◽  
A. Kojima ◽  
M. Katoh ◽  
K. Kamata ◽  
S. Ohtani
Keyword(s):  
Plasma Treatment ◽  
Cold Plasma ◽  
Surface Characterization ◽  
Carbon Surfaces
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