Effects of preparation methods on the structure and mechanical properties of wet conditioned starch/montmorillonite nanocomposite films

Péter Müller, Éva Kapin, E. Fekete

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

TPS/Na-montmorillonite nanocomposite films were prepared by solution and melt blending. Clay content changed between 0 and 25 wt% based on the amount of dry starch. Structure, tensile properties, and water content of wet conditioned films were determined as a function of clay content. Intercalated structure and VH-type crystallinity of starch were found for all the nanocomposites independently of clay and plasticizer content or preparation method, but at larger than 10 wt% clay content nanocomposites prepared by melt intercalation contained aggregated particles as well. In spite of the incomplete exfoliation clay reinforces TPS considerably. Preparation method has a strong influence on mechanical properties of wet conditioned films. Mechanical properties of the conditioned samples prepared by solution homogenization are much better than those of nanocomposites prepared by melt blending. Water, which was either adsorbed or bonded in the composites in conditioning or solution mixing process, respectively, has different effect on mechanical properties.

Original languageEnglish
Pages (from-to)569-576
Number of pages8
JournalCarbohydrate Polymers
Volume113
DOIs
Publication statusPublished - Nov 26 2014

Fingerprint

Bentonite
Nanocomposite films
Clay minerals
Starch
Clay
Mechanical properties
Nanocomposites
Plasticizers
Intercalation
Tensile properties
Water content
clay
Water
Composite materials

Keywords

  • Interfacial interactions
  • Mechanical properties
  • TPS/montmorillonite nanocomposite
  • Wet conditioning

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Effects of preparation methods on the structure and mechanical properties of wet conditioned starch/montmorillonite nanocomposite films. / Müller, Péter; Kapin, Éva; Fekete, E.

In: Carbohydrate Polymers, Vol. 113, 26.11.2014, p. 569-576.

Research output: Contribution to journalArticle

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