Effect of preliminary vacuum plasma treatment on coating adhesion

2016 ◽  
Author(s):  
Vladimir A. Slabodchikov ◽  
Dmitry P. Borisov ◽  
Vladimir M. Kuznetsov
Keyword(s):  
Plasma Treatment ◽  
Coating Adhesion ◽  
Vacuum Plasma

scholarly journals Plasma treatment on novel carbon fiber reinforced PEEK cages to enhance bioactivity

2016 ◽  
Vol 2 (1) ◽  
pp. 569-572 ◽  
Author(s):  
Michael Banghard ◽  
Christian Freudigmann ◽  
Kamel Silmy ◽  
Alfred Stett ◽  
Volker Bucher
Keyword(s):  
Carbon Fiber ◽  
Plasma Treatment ◽  
Biological Response ◽  
Fiber Reinforced ◽  
Vacuum Plasma ◽  
Alternative Material ◽  
Modified Surface ◽  
Good Cell ◽  
Carbon Fiber Reinforced

AbstractCarbon fiber reinforced polyetheretherketone (CFR-PEEK) has similar mechanical properties to human bone and is considered as the best alternative material to substitute titanium for spine cage implants. To compensate its poor osteogenic properties and limited bioinertness, CFR-PEEK was coated with a thin film of titanium. In the study, we investigated the biological response in vitro of titanium coated CFR-PEEK with different vacuum plasma pretreatments. The so modified surface revealed first hints for a good cell response by excellent cell adhesion and morphology of human osteoblast – like cells MG 63 (ATXX:’CRL-1427). Thus, the findings show that surface roughness of CFR-PEEK material has a profound effect on the biological activity via vacuum plasma treatment.

scholarly journals Surface Modification of Electrospun PVDF/PAN Nanofibrous Layers by Low Vacuum Plasma Treatment

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Fatma Yalcinkaya ◽  
Baturalp Yalcinkaya ◽  
Adam Pazourek ◽  
Jana Mullerova ◽  
Martin Stuchlik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Plasma Treatment ◽  
Water Remediation ◽  
High Porosity ◽  
Vacuum Plasma ◽  
Hydrophobic Membranes ◽  
Small Pore ◽  
Hydrophilic Membranes ◽  
Water Treatments

Nanofibres are very promising for water remediation due to their high porosity and small pore size. Mechanical properties of nanofibres restrict the application of pressure needed water treatments. Various PAN, PVDF, and PVDF/PAN nanofibre layers were produced, and mechanical properties were improved via a lamination process. Low vacuum plasma treatment was applied for the surface modification of nanofibres. Atmospheric air was used to improve hydrophilicity while sulphur hexafluoride gas was used to improve hydrophobicity of membranes. Hydrophilic membranes showed higher affinity to attach plasma particles compared to hydrophobic membranes.

scholarly journals Accelerated construction of an in vitro model of human periodontal ligament tissue: vacuum plasma combined with fibronectin coating and a polydimethylsiloxane matrix

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7036 ◽  
Author(s):  
Wen Liao ◽  
Yoshiya Hashimoto ◽  
Yoshitomo Honda ◽  
Peiqi Li ◽  
Yang Yao ◽  
...  
Keyword(s):  
Gene Expression ◽  
Plasma Treatment ◽  
Periodontal Ligament ◽  
Orthodontic Treatment ◽  
Cellular Proliferation ◽  
Cellular Adhesion ◽  
Cyclic Stretch ◽  
Vacuum Plasma ◽  
Fibronectin Coating

Tying shape memory wires to crowded teeth causes the wires to deform according to the dental arch. This deformation results in a resilient force that is delivered to the tooth. The appropriate amount of force can activate the osteogenetic and osteoclastic ability of the periodontal ligament (PDL) and the tooth can be moved. This is the biological basis of orthodontic treatment. To achieve further insight into the mechanisms underlying orthodontic treatment, we examined whether accelerated construction of an in vitro human PDL fibroblast (HPdLF) stretching model can be achieved by combining fibronectin coating and vacuum plasma treatment with polydimethylsiloxane (PDMS) cell-culture chambers. Each chamber was randomly assigned to a no-surface modification (NN), fibronectin coating (FN), vacuum plasma treatment (PN), or vacuum plasma treatment followed by a fibronectin coating (PF) treatment protocol. The physical and chemical features and ability to promote cellular proliferation of the PDMS chamber surfaces were evaluated. Cellular adhesion of four materials were evaluated and two best-proliferated groups were considered as better model-constructing surfaces and used in subsequent experiments and used in subsequent experiments. HPdLFs were cultured on these two kinds of chambers without stretching for 3 days, then with stretching for 7 days. Time-course gene expression cellular morphology were evaluated. Chambers in the PN group had high wettability and surface component changes. The FN and PF chambers had high cellular proliferation ability. They were selected into subsequent experiments. After 3 days of culturing HPdLFs on the PF and PN chambers, the cells in the PF chambers had significantly higher levels of runt-related transcription factor 2 (Runx-2) and osteocalcin (OCN) gene expression compared with the cells in the PN chambers. After cyclic stretch application to the cells in the PN and PF chambers, expression of the type-3 collagen (COL-3) gene in PF group continued to increase for 7 days and was significantly higher than that in the PN group from day 5 onwards. The HPdLFs in the PF group showed parallel alignment from days 3 to 7 after imposition of cyclic stretch, while those in the PN group aligned in parallel from day 5 on. Our results suggested that applying a fibronectin coating to a PDMS chamber after plasma treatment can accelerate establishment of an in vitro PDL stretching model.

Activity of Ag Nanoparticle Supported Zeolite after Plasma Treatment

2013 ◽  
Vol 133 (3) ◽  
pp. 144-145 ◽  
Author(s):  
Yoshiyuki Teramoto ◽  
Hyun-Ha Kim ◽  
Atsushi Ogata ◽  
Nobuaki Negishi
Keyword(s):  
Plasma Treatment ◽  
Ag Nanoparticle
Sign in / Sign up

Export Citation Format

Share Document