Low pressure plasma treatment of poly(3-hydroxybutyrate): Toward tailored polymer surfaces for tissue engineering scaffolds

The introduction of new ceramic materials for dental restorations is currently a reality; however, little information is available on their surface treatment for the bonding process. Furthermore, surface treatment with plasma on ceramic materials has been recently introduced, although not many studies are available. The aim of this study was to evaluate the surface properties of a leucite-reinforced feldspar ceramic (LIC) and resin matrix ceramic (RMC) after low-pressure plasma treatment. From each material, 48 discs were prepared and subject to surface treatment. The LIC group was treated by hydrofluoric acid (HF) (LIC-HF), plasma with oxygen (LIC-O2), and plasma with argon (LIC-Ar). The RMC group was treated by sandblasting with alumina (RMC-SB), plasma with oxygen (RMC-O2), and plasma with argon (RMC-Ar). The groups whose surfaces were not subjected to treatment were considered as the control group. Surface wettability and roughness was analyzed. The results showed significant differences among the treatments for both ceramics regarding wettability and roughness. Plasma treatments increased the wettability and had a very low effect on the roughness. Plasma treatments achieved similar values for both surface properties in each ceramic group with no differences between both treatments. Plasma treatment seems to be a promising alternative for ceramic surface treatments since it increased the surface energy of the ceramics analyzed and hardly affects the roughness. Further studies are necessary to evaluate the effect of plasma treatment on the bond strength of ceramics.

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Low‐pressure plasma treatment for hydrophilization of poly(ethylene terephthalate) fabrics

Journal of the Textile Institute ◽

10.1080/00405001003616777 ◽

2011 ◽

Vol 102 (3) ◽

pp. 203-213 ◽

Cited By ~ 5

Author(s):

Isabel C. Gouveia ◽

Laura C. Antunes ◽

Ana P. Gomes

Keyword(s):

Plasma Treatment ◽

Ethylene Terephthalate ◽

Low Pressure ◽

Pressure Plasma ◽

Poly Ethylene Terephthalate ◽

Low Pressure Plasma ◽

Poly Ethylene

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Low-pressure plasma treatment applied to polymeric materials for a sustainable footwear industry

10.24264/icams-2020.iv.19 ◽

2020 ◽

Author(s):

Carlos Ruzafa-Silvestre ◽

Pilar Carbonell-Blasco ◽

Elena Orgiles-Calpena ◽

Francisca Aran Ais

Keyword(s):

Plasma Treatment ◽

Polymeric Materials ◽

Low Pressure ◽

Material Surface ◽

Efficient Technology ◽

Adhesive Properties ◽

Adhesion Properties ◽

Chemical Surface ◽

Pressure Plasma ◽

Low Pressure Plasma

In this paper INESCOP proposes the improvement of the bonding of footwear soling materials using the low-pressure plasma surface treatment as a non-polluting and resource-efficient technology by means of adhesive bonds, with a reactive hot melt polyurethane adhesive, as a more sustainable alternative to current chemical surface treatments such as halogenation. More precisely, low-pressure plasma is capable of cleaning and removing all impurities, such as oxides, oils and fats on material surface. Then, it is activated by producing new chemicals species on the top layer of the substrate. Thus, the materials’ surface acquires new surface functionalities, improving the compatibility adhesive-substrate and, therefore their adhesion properties. Furthermore, in this work the surface modifications produced in these materials of different polymeric nature have been optimised to increase their roughness, wettability, adhesive properties, etc., and have been validated through various experimental characterisation techniques. As a result, the samples treated with plasma meet the adhesion requirements for footwear materials. As a result, low-pressure plasma treatment has desmonstrated to be a green, alternative, and sustainable technology in line with European policies on circular economy, which enhances material surface properties by improving the adhesion bonding process.

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