Room-temperature cured hydrophobic epoxy/graphene composites as corrosion inhibitor for cold-rolled steel

Composite coating with synergistic effect of biomimetic epoxy thermoset morphology and incorporated superhydrophobic silica for corrosion protection

“…The formation of T 1 and T 0 species was insignificant, suggesting that non-reactive organically modified precursor was present. Figure 2b shows the results of 13 C NMR analysis. The sample exhibited three peaks with nearly equal intensity at the position around 11.1, 26.1, and 43.5 ppm.…”

“…Figure 2 show the representative NMR, FTIR spectroscopy and SEM image of MS microspheres. Solidstate 29 Si NMR provided quantitative information about the condensation reaction and solid-state 13 C NMR spectroscopy was particularly useful in Figure 2a shows the 29 Si NMR spectrum, two clear resonance peaks derived from T m (T m = RSi(OSi) m (OH) 3-m , m = 1-3; T 3 at δ = -65.2 ppm and T 2 at δ = -55.7 ppm) were observed [48]. T 1 peaks were too small to be analyzed in the photography.…”

“…Both 13 C and 29 Si MAS solid-state NMR experiments were performed on a 400 MHz solid-state NMR spectrometer. 13 C MAS NMR spectra were obtained at 100.63 MHz with 7 kHz applying 90° pulses and 2.0 s pulse delays. To enhance carbon sensitivity, cross-polarization (CP) techniques were employed.…”

“…In order to facilitate the corrosion protection of various metallic substrates, versatile alternative practical coatings are being continuously developed such as conducting/ electroactive polymers, [10,11] conventional polymers containing filler with large aspect ratio [12,13] and polymer coatings with superhydrophobic surface [14,15]. Recently, great attention is paid to the potential of applications on bio-mimetic materials with super-hydrophobic surfaces structure due to their diverse potential and unprecedented hierarchical surfaces [16][17][18][19][20][21][22][23][24][25][26].…”

“…In this work, the synergistic effect of biomimetic morphology and incorporated superhydrophobic silica microspheres is used to prepare the BET-silica composite anticorrosion coatings. First of all superhydrophobic methyl-modified silica (MS) microspheres were synthesized by sol-gel reactions and characterized by FTIR, 13 C and 29 Si NMR spectra. Moreover, nanocasting technique was utilized with PDMS (poly dimethyl siloxane) as pattern-transfer polymer by using natural leaf of Xanthosoma Sagittifolium as natural template, leading to the formation of artificial BETsilica composite coatings.…”