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Prediction of elastic properties of polylactide/halloysite composites

Lookup NU author(s): Dr Kheng-Lim Goh

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Abstract

Halloysite nanotubes (HNTs) incorporated poly (lactic acid) (PLA) reinforced nanocomposites were prepared by solution casting method with 2.5, 5, 7.5 and 10 wt% of HNTs concentrations. The elastic modulus (E) and tensile strength (σ) of the nanocomposites increased with the addition of HNTs. For instance, σ and E increased by 67% and 58% with addition of 5 wt% of HNTs, respectively. Beyond 5 wt%, HNTs tend to aggregate within the PLA matrix, which was confirmed by the tensile fracture surfaces' micrographs (FE-SEM) of the nanocomposites. Experimentally obtained results of E were also compared with the Halpin-Tsai analytical model (H-T model) and a 3D finite element model (FEM) which consisted of randomly distributed nanotubes. E values predicted by FEM were closer to the experimental results compared to those predicted by the H-T model. In contrast to the H-T model, FEM captures the nonlinear elastic behaviour of the experimental data very well since it takes into account the stress field interference of HNTs within the matrix.


Publication metadata

Author(s): De Silva RT, Pasbakhsh P, Goh KL

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 8th Australasian Congress on Applied Mechanics (ACAM 2014)

Year of Conference: 2014

Pages: 951-956

Print publication date: 01/07/2015

Acceptance date: 01/01/1900

Publisher: Engineers Australia

Library holdings: Search Newcastle University Library for this item

ISBN: 9781510802674


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