Formation of Me–O–Si covalent bonds at the interface between polysilazane and stainless steel

Fabrication of graphene oxide–alumina hybrids to reinforce the anti-corrosion performance of composite epoxy coatings

“…3(a) [35]. The new characteristic peaks at 2927, 2843cm -1 (-CH), 1515 (N-H), and 1130cm -1 (Si-O-Si) [36,37] attributed to APTS, and importantly, peaks at 655 cm -1 belonged to Si-O-Al bonding [38,39] were depicted in Fig. 3(b), indicating that the nano-Al 2 O 3 had been modified by the APTS.…”

Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

“…It is well known that silazanes adhere to most surfaces, especially metallic, through chemical mechanisms involving the formation of oxygen bridges between surface and the silazane polymer chain. [ 4,5 ] The first step of the adhesion mechanism is the wetting of the substrate, to insure an intimate contact between the coating material and the surface. Due to the low surface tension of the liquid coating solution, a good wetting onto the aluminum substrates was expected.…”

“…[ 3 ] Also the coating adhesion is usually stronger than of typical organic coatings, attributed to reactions with OH groups, present at the surface of most materials, leading to chemical bonding between coating and substrate. [ 4,5 ] Suitable polysilazanes for coating applications are either liquids or soluble solids. Thus, deposition in liquid phase by simple methods, such as dip, spin, and spray coating techniques are possible.…”

Preparation and mechanical properties of Si3N4 nanocomposites reinforced by Si3N4@rGO particles

“…Moreover, the interlayer spacing of the rGO sheets at the edges of the Si 3 N 4 particle is 0.35 nm in the HRTEM image ( Figure 4D), which is slightly higher than that of graphite (0.34 nm), indicating that GO was reduced to rGO. 32 From the changes in the spectral data, it can be deduced that the APTES was successfully introduced on the surface of the Si 3 N 4 particles. In the FTIR spectrum of Si 3 N 4 particles, the absorption peak centered at approximately 3427 cm -1 was ascribed to the stretching vibrations of -OH with hydrogen-bonded association, and the peaks at 1647 cm -1 were assigned to the bending vibrations of -OH.…”

“…For the FTIR spectrum of the Si 3 N 4 -NH 2 particles, the new characteristic peaks at 2932 and 2859 cm -1 were assigned to the asymmetric and symmetric stretching vibrations of -CH 2 , while the absorption peak at 1126 cm - particles. 32 From the changes in the spectral data, it can be deduced that the APTES was successfully introduced on the surface of the Si 3 N 4 particles. The FTIR spectrum of Si 3 N 4 @ GO particles displays the presence of C=O (1728 cm −1 ), C-O-C from the epoxy or ether (1221 cm −1 ), and C-O from alkoxy (1065 cm −1 ), which are all the characteristic groups of GO, 33 indicating that the GO was coated on the surface of the Si 3 N 4 particles.…”