Article

Thin film deposition by PECVD using HMDSO-O 2 Ar gas mixture on knitted wool fabrics in order to improve pilling resistance

Fibers and Polymers (Impact Factor: 0.91). 01/2008; 9(5):566-573. DOI: 10.1007/s12221-008-0091-4

ABSTRACT In this work knitted wool fabrics were coated by a Si:Ox:Cy:Hz thin film with the aim to promote pilling resistance. The wool samples were plasma coated in a radio frequency (RF) glow
discharge using hexamethyldisiloxane (HMDSO) as the precursor, in mixture with argon and oxygen gases, for different deposition
times and reaction pressures, at constant discharge power. Deposited films were characterized by means of Fourier transform
infrared (FTIR) spectroscopy and surface morphology by means of scanning electron microscopy; moreover, propensity to pilling
of treated samples was investigated, showing that treated fabrics had a better pilling performance respect to untreated ones.

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    ABSTRACT: This work concerns the study of some important physical and mechanical properties of a wool fabric treated with a roll-to-roll atmospheric plasma jet equipment. The plasma pilot unit, based on a post-discharge technology, was equipped with an innovative plasma-to-fabric contactor, which promotes a relevant penetration of plasma through the fabric structure and geometrically defines the atmosphere. Wool fabrics were processed at three different velocities (1, 3 and 6 m/min); the other process variables were kept constant. Tensile strength, elongation at break, surface thickness, wettability and air permeability increased after the plasma treatment, while several low-stress mechanical properties, strictly related to the handle, were not modified. SEM analysis was also carried out to better interpret the above macroscopic results.
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