Formation of hydrophobic coating on glass surface using atmospheric pressure non-thermal plasma in ambient air

Abstract

Non-thermal plasmas under atmospheric pressure are of great interest in material surface processing because of their convenience, effectiveness and low cost. In this paper, the treatment of a glass surface for improving hydrophobicity using a non-thermal plasma generated by a dielectric barrier corona discharge (DBCD) with a needle array-to-plane electrode arrangement in atmospheric air is conducted, and the surface properties of the glass before and after the DBCD treatment are studied using contact angle measurement, surface resistance measurement and the wet flashover voltage test. The effects of the plasma dose (the product of average discharge power and treatment time) of DBCD on the surface modification are studied, and the mechanism of interaction between the plasma and glass surface is discussed. It is found that a layer of hydrophobic coating is formed on the glass surface through DBCD treatment, and the improvement of hydrophobicity depends on the plasma dose of the DBCD. It seems that there is an optimum plasma dose for the surface treatment. The test results of thermal ageing and chemical ageing show that the hydrophobic layer has quite stable characteristics.

Experimental study on the surface characteristics of Pd-based bulk metallic glass

“…In Pd 40 Cu 30 Ni 10 P 20 BMG, there are different metallic bonds and some covalent bonds because of the existence of non-metallic P element. Therefore, the BMG surfaces present a stronger polar character due to the existence of polar bonds that are responsible for a strong interaction with molecular groups of liquids, justifying its hydrophilic character [34]. Mold steels NAK80 and LKM2343ESR are Fe-based polycrystalline alloys which are composed of many crystalline grains.…”

Surface Coating Treatment of Phosphor Powder Using Atmospheric Pressure Dielectric Barrier Discharge Plasma

“…특히, 본 연구에서 사용한 유전체배리어방전 (dielectric barrier discharge, DBD) 플라즈마 공정은 진공 플라즈마 공 정 대비 낮은 투자비 및 운전비뿐만 아니라 운전조작이 용이하고 상 압에서 운영되므로 코팅 공정 자체를 생산설비와 통합시킬 수 있는 장점이 있다 [6,7]. DBD 플라즈마는 오존 제조, 대기오염제어, 살균 및 멸균, 폐수처리 등 다양한 분야에 응용되어 왔으며 [8,9], 재료 가공 분 야에서는 표면처리에의 적용 가능성에 주목하고 있다.…”

Atomic Force Microscopy – For Investigating Surface Treatment of Textile Fibers

“…The dielectric barrier discharge (DBD) is created between two metal electrodes covered with insulating layers (ceramic and polycarbonate). Under specific conditions, the DBD can produce the so-called atmospheric pressure glow (APG) discharge, which can also be effectively used for the surface treatment (Borcia, 2003, Fang, 2004.…”

“…Studies show that the highly reactive species in the discharge regime of DBDs can interact with the surfaces of materials and induce some physical and chemical changes (oxidation, polymerization, cross-linking, etching etc) and thus improve their surface properties such as wettability, printability, adhesion and conductivity (Oktem, 2000, Fang, 2004). …”