Invention Journal of Research Technology in Engineering & Management (IJRTEM) ISSN: 2455-3689 www.ijrtem.com Volume 2 Issue 9 ǁ September 2018 ǁ PP 90-95
The effect of functionalized carbon nanotubes on thermalmechanical performance of Epoxy nanocomposite coatings Phan Thi Thuy Hang1, Nguyen Dinh Lam1 1
(The University of Danang – University of Science and Technology, Danang-Vietnam)
ABSTRACT : The new approaches for preparing nanocomposite coating by modificated carbon nanonotubes (CNTs) and epoxy resin was done in the study. thermal-mechanical performance of nanocomposite coating was investigated and the results were reported in this paper. The physic-chemical techniques such as Differential scanning calorimetry (DSC) and Thermal gravimetric analysis (TGA) were used to characterize the thermal performance of Epoxy nanocomposite coating. The test techniques for mechanical properties of paint coating as adhesion, hardness, impact resistance and bending strength were employed in the work. The results indicated that CNTs were dispersed in epoxy coating with only ratio of 0.1 wt% enhanced the Glass Transition Temperature (Tg), decomposition temperature of epoxy coating and improved mechanical properties significantly. Also functionalized CNTs can be reinforced thermal-mechanical of the epoxy coating better than neat CNTs. Keywords:
I. INTRODUCTION Polymer nanocomposites are constructed by dispersing a filler material into nanoparticles that form flat platelets. Nanoparticles allow for much lower loading levels than traditional fillers to achieve optimum performance. Usually addition levels of nanofillers are less than 1%, which significantly impact weight reduction of nanocomposite films. Organic coatings provide protection either by a barrier action from the layer or from active corrosion inhibition provided by pigments in the coating [1]. Nanocomposite coating systems are defined by generic type of binder or resin, and are grouped according to the curing or hardening mechanism of that generic type and additional nanofillers. The organic binder or resin of the coating material is primarily responsible for determining the properties and resistances of the paint [3]. Epoxy resins are known for their excellent properties of anti-corrosion and of chemical resistance [2]. When properly co-polymerized with other resins (particularly those of the amine or polyamine family) or esterified with fatty acids, epoxy resins will form a durable protective coating [4]. However, organic materials alone cannot be used for high-performance applications because of their limited properties. Consequently, the addition of fillers that can withstand high temperatures, such as carbon black, silicone, and silica is frequently employed into the epoxy paint system to overcome restraint [5]. Therefore, this work used nanocarbon materials to fill in epoxy binder for protective coatings application for steel surfaces. Carbon nanotubes is a 1D structure type of nanocarbons, which offer superb electrical and thermal conductivity properties [6]. Recently, CNTs have been used efficiently in numerous research works to significantly enhance the mechanical properties of composites. With their amazing mechanical properties and exceptionally high aspect ratios, nanocarbons (NCs) are seen as one of the most beneficial nanomaterials for nano-reinforcement [6,7].
II. MATERIALS In this study, Carbon nanotubes material was producted by Bao Lam Khoa company (Da Nang, Vietnam). Epotec YD 011X-75 is a solution of unmodified low molecular weight solid diglycidyl ether of bisphenol-A resin in xylene. The dissolution of Epotec YD 011 in xylene facilitates handling. Epotec TH 7515 is a high viscosity reactive polyamide used as a curing agent for liquid or solution grade epoxy resins such as Epotec YD 515 or Epotec YD 011X75 to produce thermoset adhesives and coatings; organic solvents including: aceton, etanol, n-butanol, toluene (Merk). They are produced by Xilong Chemical Factory and Guangdong GuanghuaSci-Tech Co.
III. METHODS Characterization methods of the nanocarbon materials : In this work, Fourier Transform Infrared spectroscopy (FTIR) was employed to characterize functionalized carbon nanotubes. A Thermo Nicolet 6700 spectrometer was used to collect the FTIR data for chemical structure analysis of the fillers. The crystal structure characterization of them were analyzed by X-ray diffraction (XRD) and performed using a Siemens D5005 Xray diffractometer.
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