Effect of cold plasma process on the surface wettability of NBR and the kerosene resistance of NBR/PTFE composites

Abstract

In this study, first the acrylonitrile-butadiene rubber (NBR5080) was modified by argon (Ar), air, and oxygen plasma at low temperature, and the effect of plasma process (power, time, and pressure) on the surface properties of NBR5080, the interfacial properties, physical properties, and the mechanical properties of NBR5080/polytetrafluoroethylene (PTFE) composites were investigated. The state contact angle and the surface free energy were applied to characterize the surface wettability of NBR5080. The scanning electron microscope and the atomic force microscope were used to observe the surface morphology of the NBR5080. The chemical changes on the NBR5080 surface were verified by X-ray photoelectron spectroscopy. The average water contact angle the NBR5080 declined obviously when NBR5080 was treated by Ar (100 W/600 s/30 Pa). The active oxygen groups were introduced onto the surface of NBR5080 by cold plasma treatment and more active group containing oxygen were observed on the samples treated by Ar plasma. The peel strength between the NBR5080 and the PTFE was increased obviously, which increased from 0 to 44.2 N•m −1 for Ar plasma treatment. The mass and the dimension of NBR5080 increase sharply after immersing in kerosene, whereas the NBR5080/PTFE composites changed a little. The mechanical properties of NBR5080 and NBR5080/PTFE composites decreased as the immersion time in kerosene increased, but the decreased degree of NBR5080 is higher than NBR5080/PTFE composites.

Biowaste Eggshell Membranes for Bio-triboelectric Nanogenerators and Smart Sensors

“…After N 2 atmospheric plasma treatment, the contact angle decreased to 7.9°, indicating that the surface of this PDMS substrate was hydrophilic. Its contact angle increased from 7.9 to 55.9° after exposure to an atmospheric environment for 12 h, suggesting that the content of oxygen-containing functional groups on the plasma-treated surface of the PDMS substrate decreased upon increasing the exposure time . Therefore, the plasma treatment of the PDMS substrate subjected to thermal evaporation must be performed within 1 h to avoid such a decrease in the availability of oxygen-containing functional groups.…”

“…Its contact angle increased from 7.9 to 55.9° after exposure to an atmospheric environment for 12 h, suggesting that the content of oxygen-containing functional groups on the plasma-treated surface of the PDMS substrate decreased upon increasing the exposure time. 58 Therefore, the plasma treatment of the PDMS substrate subjected to thermal evaporation must be performed within 1 h to avoid such a decrease in the availability of oxygen-containing functional groups. XPS revealed that the C 1s and O 1s peaks shifted after N 2 plasma treatment, indicating a strong connection between the Ag layer and PDMS ( Figure 1 c,d).…”

Elastomers with biocidal properties. Part 1. Literature review

“…: łatwość przygotowania materiału do modyfikacji, dużą wszechstronność, kontrolę składu produktu, brak ograniczeń termodynamicznych, sterylność powierzchni w trakcie i po modyfikacji oraz możliwość osadzania różnych substancji na skalę komercyjną. Są tanie i nie wymagają użycia rozpuszczalników [13,[67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86].…”

“…- fizyczną modyfikację powierzchni materiału -utworzenie powierzchni superhydrofobowej [77][78][79][80][81];…”