Plasmagestuetzte Oberflaechenmodifizierung von Polypropen

The employment of polypropylene in clothing industry is restricted due to its low dye absorption. An increase in wettability of polypropylene fibers and a simultaneous increase of the interaction between dyes and fibres should be suitable procedure in order to increase the dye absorption. The author investigates the possibilities of plasma-assisted hydrophilization in order to improve the colouring properties. There is an increased water wettability of the surface of polypropylene in comparison to the untreated material with an increase in time of treatment in oxygen plasma, with an increase of the microwave input and with decreasing distance between probe material and microwave input. The degree of hydrophilization of polypropylene fibres treated by barriere discharge increases with increasing exposition time nearly being independent of the microwave performance. The oxygen supply does not influence the wettability during the plasma-assisted hydrophilization. The wettability of the surface of propylene foils decreases with increasing storage at atmosphere due to a reorientation of the plasma induced functional groups towards the interior of the foils. The wettability of plasma-assisted propylene foils in water nearly is unchanged. The functional groups are on the surface. With increasing duration of treatment in oxygen plasma and in barriere discharges, there is an increase of oxygen containing functional groups in the surface of polypropylene foils. XPS experiments at oxygen plasma treated polypropylene foils increases and then decreases with increasing duration of storage. This decrease is due to a reorientation of the oxygen containing groups from the surface into the bulk medium. With increasing duration of treatment, the surface roughness of the probe increases leading to a reduction of the contact angle with water and to an increase of the oxygen content in the surface. Beside the plasma induced insertion of oxygen containing groups, the author observes plasma induced etching processes resulting in degradation substances. The author also investigates the mount behavior of the dispersion colour Resolin Red FB and the mount behavior of the solution colours Sudan Blue II and Sudan Red B on polypropylene fibres treated by oxygen plasma and barriere discharge, respectively. The mount performance of all three colours on plasma treated fibres is greater in comparison to untreated materials. Polypropylene fibres treated by barriere discharge do not show this behavior due to the low degree of hydrophilization of the fibre surface. Sudan Blue II has the highest mount rate according to untreated and plasmatreated polypropylene fibres.SIGLEAvailable from: http://deposit.ddb.de/cgi-bin/dokserv?idn=966432460 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman