Extrusion of humidity-resistant starch foam sheets

Zhiguan Yang, Daniel Graiver, Ramani Narayan

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

An annular die is used to extrude cylindrical starch foams which are then sliced to yield foam sheets suitable for cushioning protection and insulation of shipping containers. Although starch foams, as a possible replacement of petroleum-based foams, have been prepared in the past, their sensitivity to humidity remained a problem. Extensive research in the last few years has been focused on resolving the collapse of the foam at high humidity, improve the cushioning protection, and develop an economical foaming process. However, these issues are still problematic and need to be resolved before such biobased foams can gain entry into the marketplace. In this study, a Box-Behnken statistical design of experiment was used to optimize the properties of foams extruded with various additives. It was found that the density, cell structure, and the rate of water penetration of these foams were affected by the feed rates (e.g., foam composition) of the water, talc, and poly(hydroxy ether) (PHE). The use of PHE was found to be extremely effective to minimize the water sensitivity and it significantly increased the water penetration time of the foam sheets. These starch foams efficiently absorb impacts and recover its physical shape quickly to provide multiple cushion protection for moderately delicate products.

LanguageEnglish (US)
Pages857-867
Number of pages11
JournalPolymer Engineering and Science
Volume53
Issue number4
DOIs
StatePublished - Apr 2013

Profile

Starch
Extrusion
Foams
Atmospheric humidity
Water
Talc
Petroleum
Freight transportation
Ether
Design of experiments
Containers
Insulation
Ethers
Crude oil

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Chemistry(all)

Cite this

Extrusion of humidity-resistant starch foam sheets. / Yang, Zhiguan; Graiver, Daniel; Narayan, Ramani.

In: Polymer Engineering and Science, Vol. 53, No. 4, 04.2013, p. 857-867.

Research output: Contribution to journalArticle

Yang, Zhiguan ; Graiver, Daniel ; Narayan, Ramani. / Extrusion of humidity-resistant starch foam sheets. In: Polymer Engineering and Science. 2013 ; Vol. 53, No. 4. pp. 857-867
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