Green composite: Sodium-based geopolymer reinforced with chemically extracted corn husk fibers

Sean S. Musil, P. F. Keane, W. M. Kriven

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Geopolymers are an inorganic polymeric material composed of alumina, silica, and alkali metal oxides. Geopolymers have shown promise as a low cost, environmentally friendly structural material. The addition of a reinforcing phase vastly improves the strength and toughness of the composite. For this study, sodium-based geopolymer is reinforced with chemically extracted corn husk fibers via a paste and weave approach followed by cold press and 50°C curing. Corn husk fibers (CHF) are a low cost, abundant and sustainable resource. They show moderate strength and high elongation to failure equating to high work of rupture for a natural fiber which acts as a toughening mechanism for this biocomposite. CHF are chemically extracted from corn husks using a room temperature alkali bath (10:1 molar ratio of H2O:NaOH) with manual agitation for 30 minutes and are rinsed with water to neutralize the pH. Composite tensile and flexural strength are determined for both quasi-aligned and randomly oriented fibers. Composite microstructure is also evaluated with the SEM focusing on fiber continuity and fiber/matrix interface.

Original languageEnglish (US)
Title of host publicationDevelopments in Strategic Materials and Computational Design IV - A Collection of Papers Presented at the 37th International Conference on Advanced Ceramics and Composites, ICACC 2013
Pages123-133
Number of pages11
Edition10
StatePublished - Jan 10 2014
Externally publishedYes
EventDevelopments in Strategic Materials and Computational Design IV - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013 - Daytona Beach, FL, United States
Duration: Jan 27 2013Feb 1 2013

Publication series

NameCeramic Engineering and Science Proceedings
Number10
Volume34
ISSN (Print)0196-6219

Other

OtherDevelopments in Strategic Materials and Computational Design IV - 37th International Conference on Advanced Ceramics and Composites, ICACC 2013
CountryUnited States
CityDaytona Beach, FL
Period1/27/132/1/13

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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