Untitled

Solvothermal synthesis of hydrophobic chitin–polyhedral oligomeric silsesquioxane (POSS) nanocomposites

“…Based on our results from Raman spectroscopy as well as for previously reported data for chitosan-POSS composites [44][45][46], we propose a possible mechanism of formation for the chitin-POSS composite. Additionally, it is well known that epoxides, for instance epichlorochydrine, can react with -OH [47]; -NH 2 ; and that -NH [48,49] groups and are used for crosslinking of chitosan gels [50,51].…”

“…There are only few reports about modification of chitosan with POSS nanostructures, so far. Strachota et al [46] used the excellent film-forming properties of chitosan and the ease of chemical modification of its reactive amino and hydroxyl groups for preparation of inorganic-organic chitosan-POSS membranes with desirable functionality and structure. Tishchenko et al [45] and Bleha et al [44] showed that membrane permeability to all amino acids in chitosan-POSS systems was indirectly affected by the POSS due to changes in the morphology of the hybrid membranes on the nanoscale level.…”

Synthesis and Thermal Behaviour of Novel Aliphatic/Aromatic Hepta-Cyclopentyl Bridged Polyhedral Oligomeric Silsesquioxanes (POSSs)/Polystyrene (PS) Nanocomposites

“…These substances can be considered the achievement of the chemists dream of unifying in the same products the different characteristics of both inorganic and organic compounds, different from those we can obtain by a simple blend at macroscopic level. POSSs have considerable importance owing to their excellent thermal, mechanical, optical and electrical properties [2][3][4][5][6] due to both their nanosized and cubic structure and inorganic cage [7], which allow their employment in several fields: as, for example, sensors [8], electrolyte for ion exchange membrane in fuel cell applications [9,10], novel curing agent and/or filler for epoxy system [11,12]. In the last years POSSs acquired further increasing importance due to their employment as fillers for polymer based nanocomposites [13,14] and new methods for combination of POSS and polymers has been proposed [15].…”

Thermal properties of new bismaleimide resins containing hydrogen silsesquioxane and diallyl bisphenol A

“…POSS materials had excellent thermal stability due to their inorganic structures, which contributes to their high glass transition and decomposition temperatures. POSS monomers with one or more covalently bonded reactive groups were suitable for polymerization, grafting, surface bonding, blending in molecular level 5–8. POSS substances functionalized with groups such as hydrogen,9 amine,10, 11 vinyl,12 epoxy,13 and isocyanate14 could be used as monomers or comonomers in a typical polymerization.…”

“…POSS monomers with one or more covalently bonded reactive groups were suitable for polymerization, grafting, surface bonding, blending in molecular level. [5][6][7][8] POSS substances functionalized with groups such as hydrogen, 9 amine, 10,11 vinyl, 12 epoxy, 13 and isocyanate 14 could be used as monomers or comonomers in a typical polymerization.…”