scholarly journals Functionalization of Neutral Polypropylene by Using Low Pressure Plasma Treatment: Effects on Surface Characteristics and Adhesion Properties

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 202 ◽  
Author(s):  
Chiara Mandolfino ◽  
Enrico Lertora ◽  
Carla Gambaro ◽  
Marco Pizzorni
Keyword(s):  
Surface Morphology ◽  
Photoelectron Spectroscopy ◽  
Polymeric Materials ◽  
Low Pressure ◽  
Contact Angles ◽  
Bonded Joints ◽  
Water Contact ◽  
Adhesion Properties ◽  
Pressure Plasma ◽  
Low Pressure Plasma

Polyolefins are considered among the most difficult polymeric materials to treat because they have poor adhesive properties and high chemical barrier responses. In this paper, an in-depth study is reported for the low pressure plasma (LPP) treatment of neutral polypropylene to improve adhesion properties. Changes in wettability, chemical species, surface morphology and roughness of the polypropylene surfaces were evaluated by water contact angle measurement, X-ray photoelectron spectroscopy and, furthermore, atomic force microscopy (AFM). Finally, the bonded joints were subjected to tensile tests, in order to evaluate the practical effect of changes in adhesion properties. The results indicate that plasma is an effective treatment for the surface preparation of polypropylene for the creation of bonded joints: contact angles decreased significantly depending on the plasma-parameter setup, surface morphology was also found to vary with plasma power, exposure time and working gas.

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

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.

scholarly journals Hydrophobic Leather Coating for Footwear Applications by a Low-Pressure Plasma Polymerisation Process

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3549
Author(s):  
Carlos Ruzafa Silvestre ◽  
María Pilar Carbonell Blasco ◽  
Saray Ricote López ◽  
Henoc Pérez Aguilar ◽  
María Ángeles Pérez Limiñana ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Low Pressure ◽  
Water Repellent ◽  
Functional Coatings ◽  
Water Contact ◽  
Hydrophobic Coatings ◽  
Pressure Plasma ◽  
Colour Measurements ◽  
Low Pressure Plasma ◽  
Plasma Polymerisation

The aim of this work is to develop hydrophobic coatings on leather materials by plasma polymerisation with a low-pressure plasma system using an organosilicon compound, such as hexamethyldisiloxane (HMDSO), as chemical precursor. The hydrophobic coatings obtained by this plasma process were evaluated with different experimental techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and standardised tests including colour measurements of the samples, surface coating thickness and water contact angle (WCA) measurements. The results obtained indicated that the monomer had polymerised correctly and completely on the leather surface creating an ultra-thin layer based on polysiloxane. The surface modification produced a water repellent effect on the leather that does not alter the visual appearance and haptic properties. Therefore, the application of the plasma deposition process showed promising results that makes it a more sustainable alternative to conventional functional coatings, thus helping to reduce the use of hazardous chemicals in the finishing process of footwear manufacturing.

scholarly journals The use of low pressure plasma surface modification for bonded joints to assembly a robotic gripper designed to be additive manufactured

2019 ◽  
Vol 24 ◽  
pp. 204-212
Author(s):  
Mattia Frascio ◽  
Michal Jilich ◽  
Marco Pizzorni ◽  
Margherita Monti ◽  
Massimiliano Avalle ◽  
...  
Keyword(s):  
Surface Modification ◽  
Low Pressure ◽  
Bonded Joints ◽  
Plasma Surface Modification ◽  
Plasma Surface ◽  
Pressure Plasma ◽  
Low Pressure Plasma

scholarly journals Effect of Carbon Black Nanofiller on Adhesion Properties of SBS Rubber Surfaces Treated by Low-Pressure Plasma

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 616
Author(s):  
Jacek Tyczkowski ◽  
Jacek Balcerzak ◽  
Jan Sielski ◽  
Iwona Krawczyk-Kłys
Keyword(s):  
Carbon Black ◽  
Plasma Treatment ◽  
Photoelectron Spectroscopy ◽  
Peel Test ◽  
Low Pressure ◽  
Peel Strength ◽  
Bonded Joints ◽  
Adhesion Properties ◽  
Before And After ◽  
Adhesive Bonded Joints

Studies on the surface modification of commercial styrene-butadiene-styrene (SBS) rubber with different carbon black (CB) nanofiller content (10–80 parts per hundred parts of rubber (phr)) performed by low-pressure oxygen plasma are presented in this paper. The adhesion properties of the rubber were determined by the peel test for adhesive-bonded joints prepared with a water-based polyurethane (PU) adhesive. The chemical structure and morphology of the SBS rubber surface before and after plasma treatment were investigated by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), respectively. The peel tests showed that the plasma treatment significantly improved the strength of adhesive-bonded joints in the entire range of CB tested, revealing a clear maximum for approximately 50 phr of CB. It was also found that as a result of plasma treatment, functional groups that are responsible for the reactions with the PU adhesive, such as C−OH and C=O, were formed, and their concentration, similar to the peel strength, showed maximum values for approximately 50 phr CB. The occurrence of these maxima was explained using the bound rubber model.

Fabrication of super-hydrophobic cotton fabric by low-pressure plasma-enhanced chemical vapor deposition

2018 ◽  
Vol 89 (10) ◽  
pp. 1853-1862 ◽  
Author(s):  
Liyun Xu ◽  
Jiawen Deng ◽  
Ying Guo ◽  
Wei Wang ◽  
Ruiyun Zhang ◽  
...  
Keyword(s):  
Tensile Property ◽  
Cotton Fabric ◽  
Photoelectron Spectroscopy ◽  
Chemical Vapor ◽  
Water Repellency ◽  
Low Pressure ◽  
Reaction Chamber ◽  
Cotton Fabrics ◽  
Pressure Plasma ◽  
Low Pressure Plasma

In this paper, a super-hydrophobic cotton fabric was fabricated by low-pressure plasma-enhanced chemical vapor enhanced deposition (LP-PECVD) with lauryl methacrylate (LMA) as the functional monomer. Scanning electron microscopy (SEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy were used to analyze the changes of surface morphology and chemical composition of the cotton fabrics surface, respectively. A randomly wrinkled morphology was exhibited by SEM and AFM. The combination of the low surface energy film of LMA and micro-nano-scale structure resulted in the super-hydrophobicity of modified cotton fabrics. The reactive species in LMA/Ar plasma were studied by optical emission spectroscopy, and based on the results of the test, the reaction principle in the plasma reaction chamber was discussed. It was proved that the LMA film is polymerized by chemical bonds on the surface of cotton fibers. The water repellency, washing stability, water-vapor transmission, air permeability and tensile property of fabrics were also discussed. We found that a washing-stable and breathable super-hydrophobic cotton fabric can be achieved after treatment without decreasing the tensile property.

In-Situ Processing and Characterization of Mosi2/Sic Formed by Reactive Low-Pressure Plasma Deposition

1994 ◽  
Vol 364 ◽  
Author(s):  
D. E. Lawrynowicz ◽  
J. Wolfenstine ◽  
E. J. Lavernia ◽  
S. R. Nutt ◽  
D. E. Bailey ◽  
...  
Keyword(s):  
Creep Behavior ◽  
Photoelectron Spectroscopy ◽  
Volume Fraction ◽  
Plasma Deposition ◽  
Low Pressure ◽  
Homogeneous Distribution ◽  
X Ray ◽  
Pressure Plasma ◽  
Low Pressure Plasma

AbstractLow-pressure plasma deposition (LPPD) was used to synthesize an in-situ MoSi2/SiC composite using 100% methane (CH4) as a powder carrier gas. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) identified MoSi2, Mo5Si3, Mo5Si3C, Si02, and SiC as the phases present in the composite. XRD and XPS revealed ∼6 vol% SiC in the as-sprayed material. Annealing of the as-sprayed composite increased the SiC content to ∼8 vol% while reducing the Si02 volume fraction. Transmission electron microscopy studies revealed a fine homogeneous distribution of SiC and/or carbide particles at prior splat boundaries in the MoSi2 matrix. Wavelength dispersive spectroscopy (WDS) confirmed the increased presence of carbon in the in-situ materials. Fracture toughness measurements yielded values on the order of 10 MPa m½ for annealed composites. The creep behavior of the LPPD reactive spray composite dramatically improved compared to unreinforced LPPD MoSi2. Additionally, the creep behavior was shown to be equal to or better than that of powder metallurgy MoSi2/SiC composites containing higher percentages of SiC.

Characteristics of Low Pressure Plasma Sprayed Alumina Coating

2009 ◽  
Vol 24 (1) ◽  
pp. 117-121 ◽  
Author(s):  
Chun-Ming DENG ◽  
Ke-Song ZHOU ◽  
Min LIU ◽  
Chang-Guang DENG ◽  
Jin-Bing SONG ◽  
...  
Keyword(s):  
Low Pressure ◽  
Alumina Coating ◽  
Pressure Plasma ◽  
Low Pressure Plasma ◽  
Plasma Sprayed
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