Fabrication and characterization of starch-based nanocomposites reinforced with montmorillonite and cellulose nanofibers

Jiali Li; Mi Zhou; Geng Cheng; Fei Cheng; Yi Lin; Pu-Xin Zhu

doi:10.1016/j.carbpol.2019.01.051

Fabrication and characterization of starch-based nanocomposites reinforced with montmorillonite and cellulose nanofibers

Carbohydr Polym. 2019 Apr 15:210:429-436. doi: 10.1016/j.carbpol.2019.01.051. Epub 2019 Jan 29.

Authors

Jiali Li¹, Mi Zhou², Geng Cheng¹, Fei Cheng¹, Yi Lin¹, Pu-Xin Zhu³

Affiliations

¹ Textile Institute, College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu 610065, China.
² Textile Institute, College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu 610065, China. Electronic address: zhoumihc@163.com.
³ Textile Institute, College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu 610065, China. Electronic address: zhupxscu@163.com.

PMID: 30732779
DOI: 10.1016/j.carbpol.2019.01.051

Abstract

In this study, one-dimensional (1D) cellulose nanofibers (CNFs) were used to stabilize the dispersion of two-dimensional (2D) montmorillonite (MMT) plates in aqueous system. Then the prepared MMT/CNF solution was simultaneously merged into water soluble corn starch (CS) to obtain CS/MMT/CNF composite freestanding films through a casting method. The reinforcing effect from building blocks of MMT and CNF, interfacial interactions of hydrogen and covalent bonding together led to enhanced tensile strength and Young's modulus, reduced moisture susceptibility and increased transparency of the ternary CS nanocomposites. These extraordinary properties of the ternary nanocomposites clearly point towards a new strategy for designing and fabricating high-performance starch-based nanocomposites by using binary fillers with different geometric shapes and aspect ratio. This kind of ternary nanocomposite can be widely used in food packing and preservation as a biodegradable and green film.

Keywords: Cellulose nanofibers; Corn starch; Mechanical properties; Montmorillonite; Ternary nanocomposite.