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WETTING PROPERTIES OF CHITOSAN-MODIFIED AND PLASMA-TREATED PEEK SURFACES

100%

Przykaza K. , Jurak M. , Wiącek A. E.

Progress on Chemistry and Application of Chitin and its Derivatives

2018

tom 23

159 - 169

In this paper, the wettability of chitosan/phospholipid (1,2-dipalmitoyl-sn-glycero-3-phosphocholine – DPPC), chitosan/lipid (cholesterol – Chol) and chitosan/protein (cyclosporine A – CsA) films on air plasma activated polyetheretherketone (PEEK) plates was studied. The layers were prepared using the solution spreading technique and their surface wetting properties were determined based on the measurements of the advancing and receding contact angles of water, formamide and diiodomethane. Moreover, based on the contact angle hysteresis model of Chibowski, values of total surface free energy were estimated. Significant changes in PEEK polarity were observed after plasma activation and modifications with Ch/DPPC, Ch/Chol and Ch/CsA layers. These molecules modulate the chitosan film surface by changing the type and magnitude of interactions, which is revealed in the values of surface free energy. These results may be important for the development and implementation of highly biocompatible bone substitution polymers coated with chitosan film with anti-fungal and anti-bactericidal properties. Those systems based on chitosan may also carry and release biologically active substances which could be relevant in the new generation of drug delivery systems.

Automation of plasma machining in a continuous operation line

86%

Domanowski P.

Journal of Polish CIMAC

2012

tom Vol. 7, no 3

53-58

The application of plasma techniques for surface modification like cleaning, activation and etching are described in this article. Technological process of glass packaging decoration takes place on a continuously operating conveyor line. A machine tool for plasma modification with a movable vacuum chamber has been designed. Construction and structure of mechanical, pumping and electric power supply systems have been described, together with machine tool operating cycle.

Surface Modification of Polypropylene Nonwoven after Plasma Activation at Atmospheric Pressure

72%

Černáková L. , Szabová R. , Wolfová M. , Buček A. , Černák M.

2007

tom Vol. 15, no. 5-6 (64)

121--123

Polypropylene non-woven fabrics were activated by an atmospheric-pressure plasma treatment in ambient air using a novel plasma source. Subsequently, the plasma activated samples were coated by a nanostructured Fe2O3 layer using surfactant-free water dispersion of Fe2O3 nanostructured particles. The surface of the samples was characterised by scanning electron microscopy. The Fe2O3 coating exhibited a remarkable wash resistance.

Polipropylenowe włókniny aktywowano plazmą w powietrzu pod ciśnieniem atmosferycznym za pomocą nowo opracowanego źródła plazmy. Następnie próbki, aktywowane plazmą, pokrywano warstwą Fe2O3 o strukturze nano. Do pokrywania stosowano wolną od surfaktantów zawiesinę nano-cząsteczek Fe2O3. Powierzchnię próbek oceniano za pomocą skaningowego mikroskopu elektronowego. Wytworzone warstwy charakteryzowały się dużą odpornością na pranie.