Dispersions of Nanoclays of Different Shapes into Aqueous and Solid Biopolymeric Matrices. Extended Physicochemical Study

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Abstract

Dispersions of nanofillers into aqueous and solid biopolymeric matrices were studied from the physicochemicalviewpoint. This work was carried out based on the idea that the combination of biopolymers, derived from renewable resources,and nanofiller, environmentally friendly, may form a new generation of nanomaterials with excellent andunique properties at low cost. To this purpose, two pectins with different degrees of methyl esterification and nanoclayslike halloysite and laponite RD were selected. The thermodynamic and structural studies on the aqueous mixtures ofpectin and nanoclay were able to discriminate the interactions, which control the adsorption of pectin onto the filler andthe aggregation of both pectin and clay particles. The gained insights were useful to interpret the mesoscopic structure ofthe nanocomposites (prepared from the aqueous mixtures by means of the casting method) evidenced by SEM, thermalstability, tensile properties, and transparency investigations. The attained knowledge represents a basic point fordesigning new hybrid nanostructures in both the aqueous and the solid phase for specific purposes.
Original languageEnglish
JournalLangmuir
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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