Polyimide Cellulose Nanocrystal Composite Aerogels

Baochau N. Nguyen, Elvis Cudjoe, Anna Douglas, Daniel Scheiman, Linda McCorkle, Mary Ann B Meador, Stuart J. Rowan

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Cellulose nanocrystals derived from tunicates (t-CNC) were used as a reinforcing nanofiller for polyimide aerogels. Two sets of polyimide aerogels, containing either 2,2′-dimethylbenzidine (DMBZ) or 4,4′-oxydianiline (ODA) and 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride (BPDA) cross-linked with 1,3,5-tris(4-aminophenoxy)benzene (TAB), were studied. Total solids composition of the aerogels were kept constant at 7.5 wt %, with 0-13.33 wt % of the total solids being the carboxylic acid-functionalized t-CNC (t-CNC-COOH) filler. The incorporation of the t-CNC-COOH, with carboxylic acid content of either 560 or 920 mmol/kg, in the polyimide aerogel networks improved both physical and mechanical properties of the final materials. Isothermal aging of t-CNC-COOH aerogel composites was also conducted at 150 and 200 °C for 24 h. Higher content t-CNC-COOH/polyimide aerogels showed less change in their density and reduced shrinkage during aging, which further emphasized the effect of the t-CNC-COOH reinforcement in retaining the structural integrity of the aerogel.

Original languageEnglish
Pages (from-to)1692-1703
Number of pages12
JournalMacromolecules
Volume49
Issue number5
DOIs
Publication statusPublished - 2016 Mar 9
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry

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