Sustainable sandwich structures made from bottle caps core and aluminium skins: A statistical approach

Pablo Resende Oliveira, Túlio Hallak Panzera*, Rodrigo Teixeira Freire, Fabrizio Scarpa

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

18 Citations (Scopus)
498 Downloads (Pure)


This work further investigates the manufacture and characterisation of a sustainable sandwich panel made from aluminium skins and a recycled thermoplastic bottle cap core, an innovative concept proposed in a previous paper. A full factorial design based on Design of Experiments (DoE) and Analysis of Variance (ANOVA) techniques has highlighted the complex influence of three manufacturing parameters (type of polymeric adhesive, adhesive layer thickness layer and core packing topology) on the absolute and specific physical and flexural properties of the panels. The ANOVA revealed that the use of higher amount of epoxy polymer led to enhanced panel strength and stiffness. The cell packing topology, however, did not provide a significant effect on most panel properties. Discarded bottle caps have proven to be a promising lightweight and inexpensive honeycomb component for structural applications.

Original languageEnglish
Pages (from-to)362-371
Number of pages10
JournalThin-Walled Structures
Early online date4 Jul 2018
Publication statusPublished - 1 Sep 2018


  • Bottle caps waste
  • Design of Experiments
  • Recycling
  • Sandwich composites
  • Tubular honeycomb


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