Mechanical, thermal, and water vapor barrier properties of regenerated cellulose/nano-SiO2 composite films

Jeevan Prasad Reddy, A. Varada Rajulu, Jong Whan Rhim, Jongchul Seo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Abstract: Bionanocomposite films were fabricated by reinforcing regenerated cellulose (RC) with 3-aminopropyl-functionalized silica nanoparticles (nano-SiO2). The composite films were prepared by dissolving cotton linter RC in a 7% NaOH/12% urea solution followed by the addition of nano-SiO2 and 5% H2SO4 solution. The effects of nano-SiO2 concentration (1–5 wt% with respect to RC) on the morphology, water vapor permeability (WVP), thermal properties, and mechanical properties of the RC/nano-SiO2 composite films were evaluated. Morphological studies indicated uniform dispersions of the low-concentration nano-SiO2 particles in the RC matrix. The tensile strength and modulus were increased by 26% and 15%, respectively, in the presence of 2 wt% of nano-SiO2 relative to the values of neat RC film. The WVP of the RC/nano-SiO2 composite films decreased by 22% after reinforcement with 2 wt% nano-SiO2. The results revealed that there is a potential interaction between RC and nano-SiO2, resulting in improved thermal and mechanical properties of the RC/nano-SiO2 composite films compared to those of neat RC film. Graphical abstract: Bionanocomposite films were fabricated by reinforcing regenerated cellulose (RC) with 3-amino propyl functionalized silica nanoparticles (nano-SiO2). The effects of nano-SiO2 (1–5 wt% with respect to RC) on the morphology, water vapor permeability (WVP), and thermal and mechanical properties of the RC/nano-SiO2 composite films were evaluated. This study highlights the potential of organically modified nano-SiO2 to enhance the properties of RC owing to the ability of nano-SiO2 to interact with the RC matrix at very low concentrations (2 wt%).[Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)7153-7165
Number of pages13
JournalCellulose
Volume25
Issue number12
DOIs
Publication statusPublished - 2018 Dec 1

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics

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