Moisture effect on deformability of epoxy/montmorillonite nanocomposite

Abstract

In this article the moisture effect on deformability of epoxy/montmorillonite nanocomposite was investigated. The change of fracture character and drop of elastic characteristics due to moisture absorption was observed. The estimation of filler morphological peculiarities (platelet stack constitution) in composite and its effect on nanocomposite elastic properties was undertaken. It is shown that the higher number of filler platelet per stack consistently leads to the decrease of nanocomposite elastic properties. Nevertheless prediction by micromechanical model is rough for moistened nanocomposite because of resin structural changes.

Comprehensive high‐performance epoxy nanocomposites co‐reinforced by organo‐montmorillonite and nano‐SiO2

“…For the epoxy nanocomposites containing clays, the exfoliated clay layers enhance nanocomposite properties more substantially than the intercalated clay layers, and the higher the degree of exfoliation, the better the properties 2, 21. However, it is still difficult to achieve complete exfoliation of clays in epoxy, even if organically modified clays are used 2–8. Unexpectedly, the highly exfoliated clay layers were readily accomplished in the epoxy/o‐MMT/nano‐SiO 2 nanocomposite by the simple addition of nano‐SiO 2 particles.…”

“…2,21 However, it is still difficult to achieve complete exfoliation of clays in epoxy, even if organically modified clays are used. [2][3][4][5][6][7][8] Unexpectedly, the highly exfoliated clay layers were readily accomplished in the epoxy/o-MMT/nano-SiO 2 nanocomposite by the simple addition of nano-SiO 2 particles. This effect must be caused by the strong interaction between nanoscale particles.…”

“…Therefore, clays can effectively enhance some properties of epoxy even at low loadings. [1][2][3][4][5][6][7] Unfortunately, while enhancing some properties of epoxy, the incorporation of clays often causes impairment to some other properties. [8][9][10][11][12][13][14][15][16] The most typical example of the impairment is a decrease in strength.…”

“…[17][18][19] The merits of nano-SiO 2 particles as reinforcer may remedy the deficiencies of clays listed earlier. So far, there have been numerous reports on the use of single reinforcer to epoxy, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] but little research has been focused on reinforcing epoxy with multiple nanofillers. 20 To the best of our knowledge, no study on co-reinforcing epoxy with clay and nano-SiO 2 has been published in the literature.…”

Modeling of creep for multiwall carbon nanotube/epoxy nanocomposite

“…An appearance of multiwall carbon nanotubes (MWCNTs) with their unique properties including mechanical ones (high stiffness, strength, and flexibility) invoked a great number of investigations on modification of polymer matrices for high strength composites. Epoxy matrices are preferable in structural materials due to relatively high stiffness and strength, good chemical and corrosion resistance, low shrinkage in cure, high adhesion, and dimensional stability 1–3. Besides high stiffness and strength, a matrix material has to possess viscoelastic and/or viscoplastic properties to eliminate brittle fracture of the composite.…”