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Journal of Materials Engineering and Applications

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Surface modification of polyester via soil release polymers for cleaning enhancement and Micro spectroscopic analysis of silica nanoparticle-embedded polyester coated steel surfaces subjected to prolonged UV and humidity exposure-Nanotechnology 2016, November 24-25, 2016 Melbourne, Australia

Author(s): Moses Chingala

Anti-fouling coatings realize many applications in biomedicine, water treatment and material science, preventing microorganism’s attachment to the surface and biofilm development. Totally different methods are adopted to unleash anti-fouling properties on substrate and that they ar supported chemical and physical ways. Among the chemical ways, the employment of soil unleash polymers (SRP) to change hydrophobic textile surfaces (e.g. polyester) is gaining interests. In fact, hydrophobic soil adhesion is increased on hydrophobic materials that are tougher to wash as a consequence. SRP deposition on material surface results in a rise of material surface energy, delivering soil unleashes edges. During this work, the deposition of a variety of SRPs on polyester and also the influence of deposition parameters, like agitation, pH scale and SRP concentration, are investigated. Streaming potential measurements are accustomed assess changes in surface charge because of SRP deposition. The remaining concentration of every SRP in answer, when the deposition, has been assessed via UV/vise qualitative analysis, resulting in the determination of surface assimilation isotherms for the polymers. The ascertained changes in streaming potential were found to rely powerfully on the polymer’s charge and on the concentration of SRP deposited. Moreover, the importance of SRP charge for decisive its affinity with polyester was highlighted. Edges on soil removal were known once SRPs coating has been effectively deposited. Material surface characterization has conjointly centered on distinguishing changes in body, roughness and wettability because of SRPs deposition via SEM, BET and get in touch with angle mensuration. Surface modification of polymers and paints may be common and effective thanks to enhance the properties of those materials. This may be achieved by introducing a skinny coating that preserves the majority properties of the fabric, whereas protective it from environmental exposure. Appropriate materials for such coating technologies ar inorganic oxides, like aluminium oxide, titania and silicon dioxide; but, the fate of those materials throughout long environmental exposure is associate open question. During this study, chemical compound coatings that had been increased with the addition of silicon dioxide nanoparticles (SiO2NPs) and afterwards subjected to environmental exposure, were ictimization each before and when the exposure to work out any structural changes ensuing from the exposure. High-resolution cyclotron macro ATR-FTIR microspectroscopy and surface geography techniques, as well as optical profilometry and atomic force research (AFM), were accustomed verify the long impact of the atmosphere on these twin protection layers when three years of exposure to tropical and sub-tropical climates in Singapore and Queensland (Australia). Principal part analysis (PCA) supported the cyclotron macro ATR-FTIR spectral knowledge discovered that, for the 9/11 (w/w) SiO2NP/polymer coating, a transparent discrimination was ascertained between the management cluster (no environmental exposure) and people samples subjected to a few years of environmental exposure in each Singapore and Queensland. The PCA loading plots indicated that, over the 3 year exposure amount, a serious modification occurred within the chemical compound ring vibration within the alkali resins. This may be attributed to the chemical compound ring being terribly sensitive to chemical reaction below the high wetness conditions in tropical/sub-tropical environments. This work provides the primary direct molecular proof, no inheritable employing a high-resolution mapping technique, of the climate-induced chemical evolution of a polyester coating. The ascertained changes within the surface topography of the coating are in step with the changes in chemical composition. The surface modification of polymers and paints accustomed coat substrate surfaces is a beautiful methodology for enhancing the properties of those materials. A skinny overcoat will preserve the fascinating properties related to the majority material, like mechanical strength and look, however will modification the method during which the surface interacts with the atmosphere. One example is that the application of titania films to substrates for the needs of transmission photocatalytic, self-cleaning practicality to the surface. Materials usually used for these applications ar inorganic oxides, like aluminium oxide, titania and silica. These materials ar usually combined or derivatized in varied ways; one example is via the absorption of useful agents throughout mesoporous networks. These coatings could also be applied through answer based mostly processes or via vapor deposition technologies. Typically, the thickness of the layers applied is a smaller amount than one micrometer. Only if the substrate surfaces being coated could also be unstable within the atmosphere, the fate of the coating materials and their ability to retain their protecting and mechanical properties throughout long environmental exposure is of dominant importance. Recent advances in surface engineering have seen the employment of silicon dioxide nanoparticles (SiO2NPs) within the development of innovative, extremely useful and sturdy surface coatings that exhibit increased skills to resist corrosion. The long impact of environmental exposure upon these twin protection layers on steel surfaces has, however, not been studied.

The extremely collimated cyclotron infrared (IR) beam primarily provides 100–1000 times larger brightness than those obtained ictimization standard thermal Globar™ IR sources in most laboratory-based FTIR instruments. This extremely intense beam allows the acquisition of high-quality FTIR spectra at diffraction-limited abstraction resolutions. As such, the cyclotron FTIR technique represents a superb analytical platform for getting spatially-resolved chemical mapping of materials at a lateral resolution between 3–10 μm (depending on the wavelength used). At the Australian cyclotron IR beamline, a way supported macroscopical (macro) attenuated total reflection (ATR)-FTIR microspectroscopy was recently developed to modify the coupling of the cyclotron IR beam to a Ge (Ge) ATR element]. The high index of refraction of Ge (nGe = 4) permits associate ATR-FTIR mapping mensuration to be accustomed probe surface-specific molecular data touching on materials at fourfold larger resolution than that ready to be achieved in comparable transmission and reflection factor modes. In contrast to the standard microscopic (micro) ATR-FTIR approach, the macro ATR-FTIR technique solely needs one contact to be created between the sample and also the ATR crystal for the whole mapping mensuration that not solely ends up in a larger scanning speed, however conjointly reduces the chance of sample harm and cross-contamination between mensuration positions.


Google Scholar citation report
Citations : 30

Journal of Materials Engineering and Applications received 30 citations as per Google Scholar report