Preparation and properties of calcium silicate hydrate-poly(vinyl alcohol) nanocomposite materials

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1007/s10973-005-0846-8Journal of Thermal Analysis and Calorimetry, 82, 1, pp. 89-95, 2005-09-01 Preparation and properties of calcium silicate hydrate-poly(vinyl alcohol) nanocomposite materials Mojumdar, S. C.; Raki, L.http://irc.nrc-cnrc.gc.caPre pa rat ion a nd prope r t ie s of c a lc ium silic at e hydrat e -poly(vinyl a lc ohol) na noc om posit e m at e ria ls NRCC-48686Mojumdar, S.C.; Raki, L.A version of this document is published in / Une version de ce document se trouve dans : Journal of Thermal Analysis and Calorimetry, v. 82, no. 1, Sept. 2005, pp. 89-95 doi: 10.1007/s10973-005-6837-y IntroductionNanocomposites are a new class of composites, that are particle-filled polymers for which at least one dimension of the dispersed particles is in the nanometer range. Three types of nanocomposites, depending on how many dimensions of the dispersed particles are in the nanometer range can be distinguished [1]. Particles with three dimensions in the order of nanometers are typically isodimensional, such as spherical silica nanoparticles obtained by in situ sol-gel methods [2,3] or by polymerization promoted directly from their surface [3,4]. They also include semiconductor nanoclusters [5] and others [3]. Nanotubes or whiskers (with dimensions in the nanometer scale and the third forming a larger elongated structure), for example, carbon nanotubes [6] or cellulose whiskers [7,8], are extensively studied as reinforcing phases yielding materials with exceptional properties. The third type of nanocomposites is characterized by only one dimension in the nanometer range. In this case the material is present in the form of sheets of one to a few nanometers thick and hundreds to thousands nanometers long. This family of composites is referred to as polymer-layered crystal nanocomposites.Depending on the nature of the components used (layered structure, organic ions/polymer matrix) and the method of preparation, three main types of composites may be obtained when a layered structure is associated with a polymer [1].If the polymer is unable to intercalate between the layered sheets, a phase-separated composite is obtained, whose properties stay in the same range as traditional microcomposites. Beyond this classical family of composites, two types of nanocomposites can be dis...

Characterization and Properties of Calcium Silicate Hydrate Polymer Nanocomposites

“…For C-S-H, the particles display a sinuous surface, typical of this material [17]. PVA has a semi-amorphous character, as it has been confirmed by XRD results [12]. Significant differences in SEM micrographs of C-S-H, PVA and C-S-HPN materials with different polymer ratios are observed (Figs.…”

“…Materials, synthesis and analytical procedures are described in [12][13][14]. C-S-H and C-S-HPN materials with PVA content of (0.0 and 0.05, 0.15, 0.5 and 0.75 g/g Ca salt) were synthesized by gradually adding calcium nitrate solution (1 mol/L) with continual stirring under nitrogen to sodium silicate solution, which was pre-dissolved with PVA (only for the synthesis of C-S-HPN materials) in CO 2 -free de-ionized water.…”

“…When the three dimensions are in the order of nanometers, we are dealing with isodimensional nanoparticles, such as spherical silica nanoparticles obtained by in situ solgel methods [5,6] or by polymerization promoted directly from their surface [7], but also can include semiconductor nanoclusters [8] and others [9]. When two dimensions are in nanometer scale and the third is larger, forming an elongated structure, we speak about nanotubes or whiskers as, for example, carbon nanotube [10] or cellulose whiskers [11,12], which are extensively studied as reinforcing nanofillers yielding materials with exceptional properties. The third type of nanocomposites is characterized by only one dimension in the nanometer range.…”

Synthesis, thermal and structural characterization of nanocomposites for potential applications in construction

“…The synthesis of C-S-H-based nanocomposites using a number of organic polymers was recently reported in [2][3][4][5][6].…”

A review on carbon nanotubes in an environmental protection and green engineering perspective

“…The future perspective point of view for solving waste disposal issues has driven the challenge to synthesize green nanocomposites by using biodegradable polymers as part of the wave of next generation materials (Mojumdar and Raki, 2005;Wang et al, 2005). The green nanocomposite trend employing natural renewable resources embraces the concept of LCA favoring recycling and reuse of waste.…”