Abstract
Atmospheric pressure plasma pretreatment was studied as a dry alternative to conventional wet cleaning methods of glass, with the aim at industrial requirements. Diffuse coplanar surface barrier discharge (DCSBD) and multi-hollow surface dielectric barrier discharge in air at atmospheric pressure were used on soda-lime glass. Surface analyses by water contact angle measurement, X-ray photoelectron spectroscopy, atomic force microscopy and Fourier-transform infrared spectroscopy were complemented by industrial ball drop and bending tests realized on laminated safety glass. A highly effective and non-invasive surface treatment suitable for large-area processing was achieved with the plasma of DCSBD. Targeting the industrial applications, the DCSBD system was adjusted to the devices to enable contactless and in-line electrode implementation to the manufacturing processes.
Highlights
The main objective of laminated glass is ensuring front-impact crash resistance, which is a valuable property for automotive industry [1], civil engineering or arms industry [2]
3 s multi-hollow surface dielectric barrier discharge (MSDBD) exposure in contact mode resulted in the lowest water contact angle (WCA) value (6.3 ± 1.3)°, which is similar in the range of uncertainty to the result achieved with Diffuse coplanar surface barrier discharge (DCSBD) for the same exposure time and to the value referred to in [8]
Employing noncontact mode of MSDBD leading at the 0.3 mm distance commonly used for DCSBD [6] resulted in WCA values higher than 10° without gas flow and 15° using air as working gas
Summary
The main objective of laminated glass is ensuring front-impact crash resistance, which is a valuable property for automotive industry [1], civil engineering or arms industry [2]. The toughness of laminated products is dependent on the adhesion of contact surfaces. This study targets the adhesion improvement of glass surface without side-effects to its internal structure by precleaning and chemical activation [1], [3], [4]. Plasma can be considered an attractive tool for dry surface pretreatment of glass before coating with added layers [4], its bonding [1], [2] or laminating [5]. The use of thermally non-equilibrium plasma generated in air at atmospheric pressure reduces costs for surface treatment of materials like the widely used soda-lime glass (SLG) [6]. The effect of pretreatment by plasma generated using two different surface dielectric barrier discharges (DBD) was studied with the aim of contactless and in-line electrode implementation under industrial conditions. Areas of glass were investigated, whereas in our experiments and industrial trials we were able to treat largearea glass
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