Next Article in Journal
Design and Production of Continuously Gradient Macro/Microporous Calcium Phosphate (CaP) Scaffolds Using Ceramic/Camphene-Based 3D Extrusion
Next Article in Special Issue
Potential Applications of Nanocellulose-Containing Materials in the Biomedical Field
Previous Article in Journal
Magnetic Hysteresis in Nanocomposite Films Consisting of a Ferromagnetic AuCo Alloy and Ultrafine Co Particles
Previous Article in Special Issue
Cellulose Nanocrystal Membranes as Excipients for Drug Delivery Systems
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Materials 2017, 10(7), 718; https://doi.org/10.3390/ma10070718

A Study on Thermal and Nanomechanical Performance of Cellulose Nanomaterials (CNs)

1
Forest Industry Engineering, Bursa Technical University, Bursa 16310, Turkey
2
School of Forest Resources, University of Maine, Orono, ME 04469-5755, USA
3
Advanced Structures & Composites Center, University of Maine, Orono, ME 04469, USA
*
Author to whom correspondence should be addressed.
Received: 3 May 2017 / Revised: 11 June 2017 / Accepted: 23 June 2017 / Published: 28 June 2017
(This article belongs to the Special Issue Nanocellulose-Based Functional Materials)
Full-Text   |   PDF [1751 KB, uploaded 29 June 2017]   |  

Abstract

Wood-based cellulose nanomaterials (CNs) (specifically, cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs)) are environmentally sourced low-impact materials with remarkable thermal, mechanical, and physical properties. This uniqueness makes them great candidates for creating nanocomposite materials with a wide range of attributes. Investigating the morphological, thermal, and nanomechanical properties of CNs becomes crucial to intelligent development of novel composite materials. An atomic force microscope equipped with a nanoindenter was used to investigate the compression modulus of CNFs and CNCs using two analytical approaches (denoted as Oliver Pharr (OP) and Fused Silica (FS)). The CNC modulus values (ECNC-FS = 21.1 GPa, ECNC-OP = 28.7 GPa) were statistically larger than those obtained from CNFs (ECNF-FS = 12.4 GPa, ECNF-OP = 15.1 GPa). Additionally, the FS analytical approach provided statistically significant lower estimates. Thermal stability of CNFs and CNCs was investigated using thermogravimetric analysis. Significant differences were found between CNF and CNC onset temperatures (OnsetCNC = 228.2 °C, OnsetCNF = 279.9 °C), decomposition temperatures (DTGACNC = 247.9 °C, DTGACNF = 331.4 °C), and residues (ResidueCNC = 34.4%, ResidueCNF = 22.8%). This research enriches the information on thermal stability and nanomechanical performance of cellulose nanomaterials, and provides increased knowledge on understanding the effect of CNs as a matrix or reinforce in composites. View Full-Text
Keywords: cellulose nanomaterials (CNs); cellulose nanofibrils (CNFs); cellulose nanocrystals (CNCs); atomic force microscope (AFM); nanoindentation (NI); nanomechanical properties; thermal stability; oliver-pharr approach; fused silica approach cellulose nanomaterials (CNs); cellulose nanofibrils (CNFs); cellulose nanocrystals (CNCs); atomic force microscope (AFM); nanoindentation (NI); nanomechanical properties; thermal stability; oliver-pharr approach; fused silica approach
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Yildirim, N.; Shaler, S. A Study on Thermal and Nanomechanical Performance of Cellulose Nanomaterials (CNs). Materials 2017, 10, 718.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top