scholarly journals Polyethylene glycol and poly(vinyl alcohol) hydrogels treated with photo-initiated chemical vapor deposition

2016 ◽  
Vol 94 (9) ◽  
pp. 744-750 ◽  
Author(s):  
Taraneh Javanbakht ◽  
Ariane Bérard ◽  
Jason R. Tavares
Keyword(s):  
Chemical Vapor Deposition ◽  
Polyethylene Glycol ◽  
Vapor Deposition ◽  
Photoelectron Spectroscopy ◽  
Vinyl Alcohol ◽  
Chemical Vapor ◽  
Molecular Structures ◽  
Poly Vinyl Alcohol ◽  
Chemical Structures ◽  
Initiated Chemical Vapor Deposition

This study was designed to determine if surface modification via photo-initiated chemical vapor deposition (PICVD) affects the physicochemical properties of polyethylene glycol (PEG) and poly(vinyl alcohol) (PVA) differently, given their different chemical structures and properties. Contact angle measurements showed that both polymers increase in surface hydrophobicity after PICVD treatment. Further, the improved hydrophobicity facilitated dispersion into nonpolar solvents. Chemical changes were concentrated near the surface, evidenced by Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) measurements, indicating namely that partial oxidation occurs during treatment. These findings were discussed in the context of the difference of the molecular structures of PEG and PVA, which, in turn, control their surface functionalization and hydrophobicity.

scholarly journals Surface functionalization of 3D-printed plastics via initiated chemical vapor deposition

2017 ◽  
Vol 8 ◽  
pp. 1629-1636 ◽  
Author(s):  
Christine Cheng ◽  
Malancha Gupta
Keyword(s):  
Chemical Vapor Deposition ◽  
3D Printing ◽  
Vapor Deposition ◽  
Photoelectron Spectroscopy ◽  
Chemical Vapor ◽  
Acrylonitrile Butadiene Styrene ◽  
Poly Lactic Acid ◽  
Material Strength ◽  
Initiated Chemical Vapor Deposition ◽  
3D Printed

3D printing is a useful fabrication technique because it offers design flexibility and rapid prototyping. The ability to functionalize the surfaces of 3D-printed objects allows the bulk properties, such as material strength or printability, to be chosen separately from surface properties, which is critical to expanding the breadth of 3D printing applications. In this work, we studied the ability of the initiated chemical vapor deposition (iCVD) process to coat 3D-printed shapes composed of poly(lactic acid) and acrylonitrile butadiene styrene. The thermally insulating properties of 3D-printed plastics pose a challenge to the iCVD process due to large thermal gradients along the structures during processing. In this study, processing parameters such as the substrate temperature and the filament temperature were systematically varied to understand how these parameters affect the uniformity of the coatings along the 3D-printed objects. The 3D-printed objects were coated with both hydrophobic and hydrophilic polymers. Contact angle goniometry and X-ray photoelectron spectroscopy were used to characterize the functionalized surfaces. Our results can enable the use of iCVD to functionalize 3D-printed materials for a range of applications such as tissue scaffolds and microfluidics.

scholarly journals Initiated Chemical Vapor Deposition (iCVD) Functionalized Polylactic Acid–Marine Algae Composite Patch for Bone Tissue Engineering

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 186
Author(s):  
Wiebke Reichstein ◽  
Levke Sommer ◽  
Salih Veziroglu ◽  
Selin Sayin ◽  
Stefan Schröder ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Chemical Vapor Deposition ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Vapor Deposition ◽  
Marine Algae ◽  
Chemical Vapor ◽  
Human Osteoblasts ◽  
Composite Patch ◽  
Initiated Chemical Vapor Deposition

The current study aimed to describe the fabrication of a composite patch by incorporating marine algae powders (MAPs) into poly-lactic acid (PLA) for bone tissue engineering. The prepared composite patch was functionalized with the co-polymer, poly (2-hydroxyethyl methacrylate-co-ethylene glycol dimethacrylate) (p(HEMA-co-EGDMA)) via initiated chemical vapor deposition (iCVD) to improve its wettability and overall biocompatibility. The iCVD functionalized MAP–PLA composite patch showed superior cell interaction of human osteoblasts. Following the surface functionalization by p(HEMA-co-EGDMA) via the iCVD technique, a highly hydrophilic patch was achieved without tailoring any morphological and structural properties. Moreover, the iCVD modified composite patch exhibited ideal cell adhesion for human osteoblasts, thus making the proposed patch suitable for potential biomedical applications including bone tissue engineering, especially in the fields of dentistry and orthopedy.

Polymer layers by initiated chemical vapor deposition for thin film gas barrier encapsulation

2011 ◽  
Vol 519 (14) ◽  
pp. 4479-4482 ◽  
Author(s):  
D.A. Spee ◽  
R. Bakker ◽  
C.H.M. van der Werf ◽  
M.J. van Steenbergen ◽  
J.K. Rath ◽  
...  
Keyword(s):  
Thin Film ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Gas Barrier ◽  
Polymer Layers ◽  
Initiated Chemical Vapor Deposition

Heteroepitaxial Nucleation and Growth of Ge ON Si(100) Surfaces Using Remote Plasma Enhanced Chemical Vapor Deposition

1988 ◽  
Vol 116 ◽  
Author(s):  
R.A. Rudder ◽  
S.V. Hattangady ◽  
D.J. Vitkavage ◽  
R.J. Markunas
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Photoelectron Spectroscopy ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Layer By Layer ◽  
Heteroepitaxial Growth ◽  
Remote Plasma ◽  
Dimensional Growth ◽  
Diffraction Patterns

Heteroepitaxial growth of Ge on Si(100) has been accomplished using remote plasma enhanced chemical vapor deposition at 300*#x00B0;C. Reconstructed surfaces with diffraction patterns showing non-uniform intensity variations along the lengths of the integral order streaks are observed during the first 100 Å of deposit. This observation of an atomically rough surface during the initial stages of growth is an indication of three-dimensional growth. As the epitaxial growth proceeds, the diffraction patterns become uniform with extensive streaking on both the integral and fractional order streaks. Subsequent growth, therefore, takes place in a layer-by-layer, two-dimensional mode. X-ray photoelectron spectroscopy of the early nucleation stages, less than 80 Å, show that there is uniform coverage with no evidence of island formation.

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