Effect of Low Pressure Nitrogen–Oxygen (N2/O2) Plasma Treatment on Surface Properties of Polypropylene Films

López

2012 VI Andean Region International Conference

et al. 2012

This research was carried out a comparative analysis of cleaning of sheet steel, for use in forming processes impregnated with a mixture of SAE 40 oil and diesel by means of low-pressure cold plasma. The plasma discharge was generated by radio frequency energy using two types of gases, argon and oxygen. Cleaning of the surface was evaluated by measuring the contact angle with deionized water, diiodo methane and ethylene glycol, for the calculus of the surface free energy by means of the Fowkes theories and Wu and gas chromatography. The results show that the plasma cleaning is more effective when using a previous cleaning, in this case the immersion in solvent (CH3 − OH).

Section: B Calculation Of Surface Free Energymentioning

confidence: 99%

Efficiency of the Low-pressure Cold Plasma in the Cleaning of Steel Sheet for Subsequent Covering

López

2012 VI Andean Region International Conference

et al. 2012

“…Therefore, plasma modification is a suitable, easy, cheap, and low environmental cost method to overcome these shortcomings. NWF-PP has been successfully activated and functionalized with cold atmospheric or low-pressure (or vacuum) plasma in order to improve polymer–polymer interactions, wettability, printability, adhesion feature, active molecules, or dyes bonding/exhaustion [ 4 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. Plasma treatment of PP surfaces has also been successfully used in bioconjugation to grow and produce microbial cellulose pellicles or to favor the polymerization of allylamine for the following applications in biomaterials [ 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, there are few or no works aimed at rating the effect of plasma treatment variables on the changes in surface chemical structure or discussing the results from detailed analytical investigations of achieved functionalities, their distribution on the surface, and their evolution over time. Some data concerning the XPS characterization [ 4 , 14 , 16 , 21 , 22 , 28 , 32 ] elucidate the possible structure of functional groups deriving from oxygen and/or nitrogen addition, roughly confirmed by ATR-FTIR spectra analysis [ 5 , 14 , 19 , 33 ] and with some insights in their stability [ 13 , 15 , 17 ]. SEM microscopy is generally used to highlight the surface morphological variations of fibers following the various treatments [ 3 , 20 , 27 , 29 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Surface Functionalization of Face Masks with Cold Plasma and Its Effect in Anchoring Polyphenols Extracted from Agri-Food

et al. 2022

To improve the capability of non-woven polypropylene-based fabric (NWF-PP) used for face mask production to retain active biomolecules such as polyphenols, the surface functionalization of NWF-PP–directly cut from face masks–was carried out by employing cold plasma with oxygen. The nature/structure of the functional groups, as well as the degree of functionalization, were evaluated by ATR-FTIR and XPS by varying the experimental conditions (generator power, treatment time, and oxygen flow). The effects of plasma activation on mechanical and morphological characteristics were evaluated by stress–strain measurements and SEM analysis. The ability of functionalized NWF-PP to firmly anchor polyphenols extracted from cloves was estimated by ATR-FTIR analysis, IR imaging, extractions in physiological solution, and OIT analysis (before and after extraction), as well as by SEM analysis. All the results obtained converge in showing that, although the plasma treatment causes changes–not only on the surface–with certain detriment to the mechanical performance of the NWF-PP, the incorporated functionalities are able to retain/anchor the active molecules extracted from the cloves, thus stabilizing the treated surfaces against thermo-oxidation even after prolonged extraction.

Arab Journal of Nuclear Sciences and Applications

“…Depending on the gas composition and treatment conditions, the energetic plasma species (electrons, ions, fast atoms, free radicals and UV photons) participate in polymer surface treatment, resulting in three main effects:(i) etching, (ii) activation and (iii) cross-linking [12]. The advantages of this technique is that plasma treatment changes the properties of the material only a thin near-surface layer typically with depth 0.005 to 0.05 µm [13]. In addition, it is a rapid and environmentally friendly process [14].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Surface Modification of PS Films Using DC Glow Discharge Plasma in N2 and Ar

Farag

2019

In this paper, the polystyrene (PS) film surface was treated using DC glow discharge nitrogen (N 2) and argon (Ar) plasma to improve the wettability and antibacterial properties. The untreated and plasma treated surfaces were characterized by contact angle, FTIR, XRD and SEM analysis. The antibacterial activity of untreated and plasma treated PS films was evaluated using optical density (OD) technique against Staphylococcus aureus bacteria. The results of the PS film surface treated in both N 2 and Ar showed a noticeable increase in the wettability due to the increase in the roughness and the introduction of oxygen-containing polar groups as corroborated with SEM, weight loss calculations and FTIR spectra. The results of antibacterial activity showed that the treated samples inhibit the bacterial growth. The Ar treatment created more oxygen-containing polar groups and increase roughness on the PS film surface and extensively modified the polymer surface than the N 2 treatment.