Adhesion Improvement of Polyimide/PDMS Interface by Polyimide Surface Modification

MRS Advances ◽  
2016 ◽  
Vol 1 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Shivani Joshi ◽  
Antonie van Loon ◽  
Angel Savov ◽  
Ronald Dekker
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Thick Layer ◽  
Silicon Wafers ◽  
Oxygen Plasma Treatment ◽  
Adhesion Promoters ◽  
Peel Testing ◽  
Surface Modification Techniques ◽  
Shear Tester

ABSTRACTSilicon wafers coated with a 5μm thick layer of polyimide were treated with different surface modification techniques such as chemical adhesion promoters, oxygen plasma and an Ar+ sputter etch. After surface modification, the wafers were molded with a 1mm thick layer of PDMS. The adhesion of the PDMS was tested by peel testing and by using a Nordson DAGE wedge shear tester. It was found that commercially available chemical adhesion promoters and oxygen plasma treatment resulted in a very poor PI/PDMS adhesion, whereas the Ar+ sputter etch resulted in an adhesion so strong that the PDMS could not be delaminated from the PI surface without the failure of the material.

scholarly journals Surface modification of P dl LGA microspheres with gelatine methacrylate: Evaluation of adsorption, entrapment, and oxygen plasma treatment approaches

2017 ◽  
Vol 53 ◽  
pp. 450-459 ◽  
Author(s):  
Abdulrahman Baki ◽  
Cheryl V. Rahman ◽  
Lisa J. White ◽  
David J. Scurr ◽  
Omar Qutachi ◽  
...  
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Treatment Approaches

scholarly journals Argon and Argon–Oxygen Plasma Surface Modification of Gelatin Nanofibers for Tissue Engineering Applications

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Abolfazl Mozaffari ◽  
Mazeyar Parvinzadeh Gashti ◽  
Mohammad Mirjalili ◽  
Masoud Parsania
Keyword(s):  
Tissue Engineering ◽  
Surface Modification ◽  
Plasma Treatment ◽  
Ftir Spectroscopy ◽  
Oxygen Plasma ◽  
Attenuated Total Reflection ◽  
Oxygen Plasma Treatment ◽  
Engineering Applications ◽  
Plasma Surface Modification ◽  
Plasma Surface

In the present study, we developed a novel approach for functionalization of gelatin nanofibers using the plasma method for tissue engineering applications. For this purpose, tannic acid-crosslinked gelatin nanofibers were fabricated with electrospinning, followed by treatment with argon and argon–oxygen plasmas in a vacuum chamber. Samples were evaluated by using scanning electron microscopy (SEM), atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, contact angle (CA) and X-ray diffraction (XRD). The biological activity of plasma treated gelatin nanofibers were further investigated by using fibroblasts as cell models. SEM studies showed that the average diameter and the surface morphology of nanofibers did not change after plasma treatment. However, the mean surface roughness (RMS) of samples were increased due to plasma activation. ATR-FTIR spectroscopy demonstrated several new bands on plasma treated fibers related to the plasma ionization of nanofibers. The CA test results stated that the surface of nanofibers became completely hydrophilic after argon–oxygen plasma treatment. Finally, increasing the polarity of crosslinked gelatin after plasma treatment resulted in an increase of the number of fibroblast cells. Overall, results expressed that our developed method could open new insights into the application of the plasma process for functionalization of biomedical scaffolds. Moreover, the cooperative interplay between gelatin biomaterials and argon/argon–oxygen plasmas discovered a key composition showing promising biocompatibility towards biological cells. Therefore, we strongly recommend plasma surface modification of nanofiber scaffolds as a pretreatment process for tissue engineering applications.

Surface modification of titania aerogel films by oxygen plasma treatment for enhanced dye adsorption

2015 ◽  
Vol 595 ◽  
pp. 164-170 ◽  
Author(s):  
S. Alwin ◽  
X. Sahaya Shajan ◽  
Ranjini Menon ◽  
P.Y. Nabhiraj ◽  
K.G.K. Warrier ◽  
...  
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Dye Adsorption ◽  
Oxygen Plasma Treatment ◽  
Aerogel Films

Effects of surface modification of the individual ZnO nanowire with oxygen plasma treatment

2009 ◽  
Vol 63 (28) ◽  
pp. 2516-2519 ◽  
Author(s):  
H.-W. Ra ◽  
R. Khan ◽  
J.T. Kim ◽  
B.R. Kang ◽  
K.H. Bai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Zno Nanowire ◽  
The Individual

Plasma surface modification technique–induced gelatin grafting on bio-originated polyurethane porous matrix: Physicochemical and in vitro study

2020 ◽  
pp. 096739112092907 ◽  
Author(s):  
Sahar M Hesari ◽  
Farimah Ghorbani ◽  
Farnaz Ghorbani ◽  
Ali Zamanian ◽  
Alireza Khavandi
Keyword(s):  
Fourier Transform ◽  
Surface Modification ◽  
Infrared Spectroscopy ◽  
Plasma Treatment ◽  
Fourier Transform Infrared Spectroscopy ◽  
Oxygen Plasma ◽  
Fourier Transform Infrared ◽  
Attenuated Total Reflection ◽  
Oxygen Plasma Treatment ◽  
Activated Surface

In this study, polyurethane (TPU) scaffolds were fabricated using freeze-drying technique and gelatin macromolecules immobilized on the activated surface by oxygen plasma treatment. Scanning electron microscopy (SEM) micrographs indicated an interconnected porous microstructure with randomly oriented pores. According to the results, the diameter of pores increased after plasma treatment and gelatin grafting. Fourier transform infrared spectroscopy illustrated that there is no inappropriate interaction between materials during processing; furthermore, attenuated total reflection Fourier transform infrared spectroscopy confirmed the immobilization of gelatin molecules on the surface of the plasma-treated polymeric scaffolds. Waterdrop contact angle analysis presented that wettability and hydrophilicity of constructs increased after grafting gelatin on the activated surface. Phosphate-buffered saline absorption and hydrolytic biodegradation enhanced after surface modification of the polymeric samples. Cellular behavior demonstrated better adhesion and spreading after grafting gelatin of oxygen plasma-treated constructs. No evidence of toxicity was observed for 7 days. DNA content determined that the number of viable cells increased in TPU-gelatin matrixes after 1 day in contrast with TPU scaffolds. Based on results, oxygen plasma treatment can create an activated surface to graft gelatin macromolecules and achieve optimum physicochemical, mechanical, and biological features for the neo-tissue formation.

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