Characteristics of unique HBr-hydrolyzed cellulose nanocrystals from freshwater green algae (Cladophora rupestris) and its reinforcement in starch-based film

College

College of Science

Department/Unit

Chemistry

Document Type

Article

Source Title

Carbohydrate Polymers

Volume

169

First Page

315

Last Page

323

Publication Date

8-1-2017

Abstract

Cellulose nanocrystals (CNCs) are promising materials that are readily extracted from plants and other cellulose-containing organisms. In this study, CNCs were isolated from freshwater green algae (Cladophora rupestris) thriving in a volcanic lake, using hydrobromic acid (HBr) hydrolysis. Morphological and structural studies revealed highly crystalline CNCs (94.0% crystallinity index) with preferred orientation to [100] lattice plane as shown by XRD measurements and have an average diameter of 20.0 (±4.4) nm as shown by TEM. Thermal studies showed increased temperature for thermal decomposition of CNCs (381.6 °C), which is a result of HBr hydrolysis for CNCs isolation. The isolated CNCs were reinforced into starch based biocomposites via solution casting and evaporation method. Mechanical strength was improved as high as 78% upon addition of 1% cellulose nanocrystals in the films. The produced films are promising materials for their high mechanical strength, biodegradability and availability of raw materials. © 2017 Elsevier Ltd

html

Digitial Object Identifier (DOI)

10.1016/j.carbpol.2017.04.031

Disciplines

Chemistry

Keywords

Cellulose nanocrystals; Nanofibers; Cladophora; Green algae

Upload File

wf_no

This document is currently not available here.

Share

COinS