Influence of argon plasma treatment on polyethersulphone surface

Wang

Dental Materials Journal

et al. 2015

Atmospheric-pressure cold plasma was applied to process the surface of heat-polymerized acrylic resin. Changes to the physical properties and early adherence of Candida albicans were investigated. Alternating current cold plasma with Ar/O2 as working gas was used. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were employed to study the possible mechanism. Experimental results showed that after plasma treatment, the contact angle of acrylic resin significantly decreased. There were no significant differences in roughness, flexural strength and elasticity modulus, but microhardness was significant improved in the treated group. More importantly, the early adherence of Candida albicans on the surface was reduced after plasma treatment. Cold plasma seemed to be a promising and convenient strategy of preventing the early adherence of Candida albicans on acrylic resins, which would greatly benefit potential dental applications.

Section: Discussionmentioning

confidence: 72%

Cold plasma-induced surface modification of heat-polymerized acrylic resin and prevention of early adherence of <i>Candida albicans </i>

Wang

Dental Materials Journal

et al. 2015

High Performance Polymers

“…oxygen-and nitrogencontaining plasmas) are more favourable for the introduction of polar groups on the surface of polymer membranes, resulting in better antifouling properties. [30][31][32] In addition, plasma-initiated grafting of hydrophilic groups (e.g. acrylic acid (AA)) on the surface of polymer membranes can also be effective in improving their antifouling properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance of acrylic acid grafted PES ultrafiltration membrane via plasma surface activation

Zhang

2022

A modified PES ultrafiltration membrane with excellent separation and antifouling properties was obtained after modification by remote Ar–NH3 plasma-induced acrylic acid (AA) grafting. Hydrophilic properties were characterised using water contact angle measurements. The morphology was analysed using SEM and BET measurements. Changes in the surface functional groups were determined using XPS and ATR-FTIR. The separation and antifouling properties were evaluated through a bovine serum albumin (BSA) separation experiment. The results revealed that the surface structure of the modified membrane was not destroyed, that amino groups were introduced on the surface of the PES membrane, and that AA was successfully grafted. The water contact angle decreased from 67° in the original membrane to 5 ± 0.63° in the modified membrane. The water flux increased from 30 to 93.6 L/(m2·h). The rejection rate of BSA increased from 61.5 to 93.8%, and the flux recovery rate increased from 60.0 to 92.3%.

“…One of the methods of modifying material properties such as contact angle is using nonthermal plasma. (2)(3)(4)(5)(6)(7)(8)(9)(10) The use of plasma may allow not only cost reduction but may also be more environmentally friendly. (10) Additional reductions in manufacturing costs can be achieved by the use of plasma reactors, such as an atmospheric pressure plasma jet (APPJ) that does not require the use of a vacuum.…”

Section: Introductionmentioning

confidence: 99%

Impact of Radio-frequency Atmospheric-pressure Plasma on Water Contact Angles of High-impact Polystyrene

2018

Sensors and Materials

For some applications of plastic materials, such as polystyrene, an important role is played by the wettability of the material. One of the methods of modifying material properties such as water contact angle is using nonthermal plasma. In this study, a radio-frequency atmospheric -pressure plasma jet source has been applied to the surface modification of a high-impact polystyrene film. The measurements show a dependence between the change in the water contact angle and the operating parameters of a nonequilibrium plasma treatment, such as the composition of the working gas, the flow rate, the distance from the plasma zone, and the discharge power.