Role of silanized halloysite nanotubes on structural, mechanical properties and fracture toughness of thermoset nanocomposites

Albdiry, M. T. and Yousif, B. F. (2014) Role of silanized halloysite nanotubes on structural, mechanical properties and fracture toughness of thermoset nanocomposites. Materials and Design, 57. pp. 279-288. ISSN 0264-1275

Abstract

This study investigates the structure/property relationship of thermosetting unsaturated polyester (UPE)filled with pristine halloysite (HNT) and vinyltrimethoxysilane-treated halloysite nanotubes (s-HNT)nanocomposites. The dispersion of particles and morphological structures of the nanocomposites were examined using TEM and XRD analysis as well as Fourier Transform Infrared spectroscopy (FTIR). Thermogravimetric analysis (TGA) and mechanical properties were characterized. The evaluation of stress intensity factor (KIc) was measured based on linear elastic fracture mechanics (LEFM) and single-edge notch bending (SENB) geometry to identify the role of silanized halloysites on toughening improvement. It was found that modifying UPE matrix with HNT or s-HNT changed the crystalline structure of the UPE nanocomposites, indicating a high degree of halloysite orientation. Uniform dispersed halloysites are
observed in the s-HNT/UPE versus skewed-like clusters in the HNT/UPE nanocomposite. The introduction of HNT or s-HNT up to 5 wt.% induced higher mechanical properties and improved fracture toughness associated with a shift in toughening mechanisms from a highly brittle fracture for neat UPE into matrix shear yielding and zone shielding mechanisms with the presence of halloysite particles in the nanocomposite.


Statistics for USQ ePrint 24570
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 Elsevier Ltd. Published version deposited in accordance with the copyright policy of the publisher. First Available online 15 December 2013.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 10 Apr 2014 22:10
Last Modified: 01 Jul 2016 04:16
Uncontrolled Keywords: halloysite nanotubes; unsaturated polyester; morphology; fracture toughness; silane treatment
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
Socio-Economic Objective: B Economic Development > 86 Manufacturing > 8610 Ceramics, Glass and Industrial Mineral Products > 861099 Ceramics, Glass and Industrial Mineral Products not elsewhere classified
Identification Number or DOI: 10.1016/j.matdes.2013.12.017
URI: http://eprints.usq.edu.au/id/eprint/24570

Actions (login required)

View Item Archive Repository Staff Only