The Effects Of Atmospheric Pressure He/O₂Plasma Treatments On Adhesion And Mechanical Properties Of Ethanol Pretreated Piemarker Composites

Piemarker fiber as a renewable, biodegradable and reusable green fiber, has received more and more attention. Piemarker fiber reinforced composites have light weight, low power consumption and good advantage on the environment. This paper was study on how to prepare the fiber-reinforced composites and the effect of plasma treatment on the interfacial bonding properties.Firstly, this study was focus on how to make the piemarker/PLA and piemarker/PP composites using the piemarker/PLA and piemarker/PP nonwoven fabrics. In this work, the meldable fibers melted since the fabrics suffered the pressure at a high temperature, thereby producing the composites. This method is not only convenient and low energy consumption, but more suitable for the manufacture of longer fiber reinforced composites.Secondly, gain the optimal hot-pressing process by using the orthogonal experiment.Thirdly, using the low temperature atmospheric pressure plasma jet (APPJ) treated on the nonwoven fabrics, into improve fiber and PLA, PP interfacial bonding properties. And scanned the fiber surface and the fracture interfacial electron micrograph (SEM) picture; Fourier transform infrared spectroscopic analysis (FTIR), X-ray photoelectron spectroscopy (XPS) and dynamic mechanical analysis (DMA) were used to compared the different treatment composites. Even the strength test, modulus test and tear strength test. This study found that the fibers which plasma treatment after ethanol pretreated, not only physical changes, but also a chemical reaction occurs, and the bonding properties of the fibers and the resin has been significantly improved; the breaking stress of piemarker/PLA composite have a higher increasing rate than piemarker/PP composite.Finally, compare the mechanical properties between plasma treated on nonwoven fabrics and plasma treated directly on piemarker fibers. Due to the APPJ equipment’s nozzle is small; it’s not easy to treat much more fibers, so this part’s composite had a lighter weight than former. Ethanol and plasma treating on nonwovens is better than treating on fibers by comparing the composites’ breaking stress.