A view from inside onto the surface of self-assembled nanocomposite coatings

The influence of nanoadditives on surface, permeability and mechanical properties of self-organized organic–inorganic nanocomposite coatings

“…Even the small amounts (0.5 wt%) of the different nanoadditives studied in this work led to distinct differences in surface topography and roughness of the coating films prepared. In our previous work 15, [17][18][19] we have already shown that the relief of coatings without any additive or of such filled with varying contents of colloidal silica is very regular even in sub-micrometer scale. If any layered nanoadditive (LN) is used as an admixture, the relief becomes more rugged and the individual layers are typically clustered to self-assembled formations of different size and shape, depending on the type of LN used.…”

“…These effects were caused by incorporation of nanofillers, namely of 5-20 wt% SiO 2 15,17-19 or of 1-5 wt% of montmorillonites MNa or K30. [18][19][20] In the present work, the influence of silicate nanofillers at a much lower concentration, 0.5 wt%, was studied, with special interest on two newly tested montmorillonite nanofillers, bentonite for water systems (BW) and laponite (LX). The 13 C CP/MAS NMR spectra confirm the expected chemical composition and make possible to evaluate the conversion of epoxy-amine addition (step 2 of matrix synthesis).…”

“…9,10,[12][13][14] Recently we prepared and characterized series of O-I nanocomposite coatings with inorganic filler prepared by both above-mentioned methods, i.e., inorganic structure in situ built-up and nanofiller addition. As filler, colloidal silica was used in the concentration from 5 to 20 wt% [15][16][17][18][19] and montmorillonites at concentration from 1 to 5 wt%. [18][19][20] The present work is aimed at studying the effect of a really small inorganic nanofiller amount, 0.5 wt%, in composites with an organic inorganic hybrid matrix.…”

“…As filler, colloidal silica was used in the concentration from 5 to 20 wt% [15][16][17][18][19] and montmorillonites at concentration from 1 to 5 wt%. [18][19][20] The present work is aimed at studying the effect of a really small inorganic nanofiller amount, 0.5 wt%, in composites with an organic inorganic hybrid matrix. A set of nanofillers of the montmorillonite (layered silicates) family was compared, including unmodified and chemically modified montmorillonite, bentonite for water systems and laponite.…”

The role of organic modification of layered nanosilicates on mechanical and surface properties of organic–inorganic coatings

“…As nanofiller, colloidal silica (in concentrations from 0.5 to 20 wt% [24][25][26][27] ) and unmodified and several chemically modified montmorillonites at concentrations ranging from 0.5 to 5 wt% [26][27][28] were used. The previous study by the authors 27 was aimed at studying the effect of small amounts of inorganic nanofillers on the nanocomposite properties.…”