Preparation and Characterization of Polyamide6/Organic Clay Nanocomposite as protective coating for Carbon Steel
, 26. Layla A. Al Juhaiman, Alanood A. Aljaghwani, Waffa K. Mekhamer . 2020
In this work Polyamide/organic clay nanocomposite (PCN) was successfully prepared. The raw clay was
collected from Khulays area north of Jeddah in Saudi Arabia. After grinding, it was washed with water,
thereafter it was saturated with 0.5M NaCl solution to obtain the sodium clay (NaC). To obtain the
organoclay (OC), the NaC was modified with Cetylpyridinium chloride (CPC). Polyamide6/organoclay
nanocomposites (PA6/OC NCs) were prepared at 1,2,3,4 and 5 wt% of OC. The PA6/OC
nanocomposites were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray
Diffraction (XRD), Scanning electron microscope (SEM) as well as transmission electron microscope
(TEM). The FT-IR spectra of OC show the appearance of new bands of the constituents of CPC
which gives an evidence for the presence of the organic component CPC in the OC structure. The XRD
results for OC showed a shift in d001 spacing from 10.93̊ A for NaC to 20.63̊ A for OC. The XRD results
for PA6/OC nanocomposites showed the loss of the clay crystalline structure at the low clay loading of
1-3 wt%. From TEM results, the PA6/OC nanocomposites at 1, 2, and 3wt% of OC showed
exfoliated structures while the 4 and 5wt% showed small portion of intercalated structure. The SEM
results for the OC and PA6/OC showed a good homogeneous mixture in the PA6/OC nanocomposites.
The anticorrosive properties of PA6/OC nanocomposites coatings on C-Steel were investigated using
electrochemical impedance spectroscopy (EIS) and Potentiodynamic polarization in 3.5 wt% NaCl
electrolyte. Results showed that the PA6/OC nanocomposite coatings have better corrosion protection
of C-Steel than pure PA6. The PA6/OC nanocomposite coatings containing 5wt% of the OC exhibited
the best corrosion protection which reached about 75%.
Abstract: This work aimed to compare the coating protection efficiency of C-steel using two kinds
of clay: a local Khulays clay (RCKh) from Saudi Arabia and a commercial clay (CCIn) from…
Polymer–Clay Nanocomposite (PCN) coatings were prepared using the solution intercalation
method. The raw Khulays clay was treated with NaCl to produce sodium clay (NaC). Thereafter,
…
Polystyrene/clay nanocomposite (PCN) was successfully prepared. Five characterization methods were applied: Particle size distribution analysis (PSD), Fourier Transfer Infrared spectra (FTIR), X-…