Impact modified PLA-hydroxyapatite composites – Thermo-mechanical properties

Akindoyo, John Olabode; Beg, Mohammad Dalour Hossen; Ghazali, Suriati; Heim, Hans-Peter; Feldmann, Markus

doi:10.1016/j.compositesa.2018.01.017

Cited by 100 publications

(99 citation statements)

References 31 publications

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“…With increasing content of HA, the tensile strength and elongation at break of the composite films decreased first and then stabilized. This was because there were more and more microscopic voids between the two phases of HA and PLA with increasing content of HA, and the material fractured because of the stress concentration . The modulus of elasticity of the composite films first increased and then decreased; and the modulus of elasticity of the composite films was largest when the content of HA was 1 wt%.…”

Section: Resultsmentioning

confidence: 99%

“…This was because there were more and more microscopic voids between the two phases of HA and PLA with increasing content of HA, and the material fractured because of the stress concentration. 19 The modulus of elasticity of the composite films first increased and then decreased; and the modulus of elasticity of the composite films was largest when the content of HA was 1 wt%. This may be owing to the fact that HA is a material with high modulus of elasticity, and the modulus of elasticity of the films can be improved with the proper amount of HA.…”

Section: Mechanical Properties Of Composite Filmsmentioning

confidence: 93%

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Micromorphology, mechanical, crystallization and permeability properties analysis of HA/PBAT/PLA (HA, hydroxyapatite; PBAT, poly(butylene adipate‐co‐butylene terephthalate); PLA, polylactide) degradability packaging films

Yao

Song

et al. 2019

Polymer International

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In this study, the self‐made nano‐hydroxyapatite (HA) and poly(butylene adipate‐co‐butylene terephthalate) copolyesters (PBAT) were used as fillers, and composite films of HA/PLA (PLA, polylactide) and HA/PBAT/PLA systems were prepared. The micromorphology, mechanical properties, thermal properties, crystallinity, water vapor permeability and oxygen permeability of the composite films were studied. The results show that the self‐made HA has a porous rod‐like structure with a size of 30–50 nm. PBAT was dispersed uniformly in the HA/PLA matrix in the form of spherical particles and formed many pores and holes. The tensile strength, elongation at break and modulus of elasticity of HA/PLA composite films were increased by adding 10 wt% PBAT. The addition of HA and PBAT played a synergistic function in improving the crystallinity of the composite films. The water vapor and oxygen permeabilities of HA/PLA and HA/10%PBAT/PLA composite films can be regulated by adjusting the amount of HA. The results of this study indicate that composite films with higher water vapor and oxygen permeabilities exhibit great potential for applications in green packaging and fresh‐keeping packaging. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties Of Composite Filmsmentioning

confidence: 93%

Micromorphology, mechanical, crystallization and permeability properties analysis of HA/PBAT/PLA (HA, hydroxyapatite; PBAT, poly(butylene adipate‐co‐butylene terephthalate); PLA, polylactide) degradability packaging films

Yao

Song

et al. 2019

Polymer International

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“…PLA is usually considered as a material that can be used in medicinal applications. Some of the PLA-based products used in medicine are dressing (including hydrogel), resorbable surgical sutures, bone implants and connectors and screws for fixing broken bones [5]. The products made of PLA are mostly used in the packaging and textile industries.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Wood and Basalt Fibres on Mechanical, Thermal and Hydrothermal Properties of PLA Composites

2020

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In this study, biodegradable biocomposites based on polylactide with basalt fibres (BFs) or wood fibres (WFs) of 7.5 or 15 wt% were prepared by injection moulding. Various tests, including tensile test, bending test and impact test, were carried out to investigate the mechanical properties of the composites. Additionally, the samples were tested at different temperatures. Depending on the type of fibre, differences were noted in their mechanical properties; the addition of WF caused a decrease in strength and the higher the fibre content, the higher the decrease was noted from 18% up 25% in the case of tensile strength. However, the Young modulus was improved by 45% for composites with 15 wt% of WF. The addition of BF improved all the properties, especially Young modulus was improved by over 45%. Despite the low strength observed in neat polylactide at high temperatures-394 MPa, the addition of WF or BF improved the flexural strength more than twofold up to 1684 MPa (PLA/15BF). Moreover, the addition of natural fibres caused an increase in dimensional stability as shown by the decrease of the coefficient of thermal expansion which dropped over 50% for composites with 15 wt% of BF, which significantly expands the areas of use of materials. After 4 weeks of biodegradation, only a slight decrease approximately 5% was observed in the mechanical properties together with an increase in crystallinity. Overall, the results confirm that the prepared composites can be successfully used in engineering applications with long-term operation.

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Section: Introductionmentioning

confidence: 99%

“…Despite their several benefits, biocomposites produced from PLA and HA often present some shortcomings in terms of performance . Therefore, recent researches have focused on improving the dispersion, mechanical, thermal, and dynamic mechanical properties of PLA‐HA biocomposites through surface and impact modifications . In our previous study, impact modified PLA‐HA composites were produced and specifically, impact and elongation properties of the PLA‐HA composites were found to increase by about 78% (impact strength) and 206% (elongation at break) after incorporation of impact modifier .…”

Section: Introductionmentioning

confidence: 99%

Synergized poly(lactic acid)–hydroxyapatite composites: Biocompatibility study

Akindoyo

Beg

Ghazali

et al. 2018

J of Applied Polymer Sci

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In vitro biocompatibility of impact modified composites produced from poly(lactic acid) (PLA) and hydroxyapatite (HA) is reported in this study. Surface modification was previously used to facilitate the dispersion of HA in PLA, whereas impact property of the PLA-HA composites was deliberately enhanced as it was necessary. Herein, osteoblast cell culture assay was used to assess the possible effects of HA surface modification and impact modification on the cell behavior in physiological media. Furthermore, antimicrobial properties of the HA were assessed. Evidence of HA modification was confirmed through elemental and spectroscopic analysis. Incorporation of HA offered better cell attachment and proliferation to the PLA matrix, with significant increase in the cell viability (%). Also, modification of HA did not present obvious cytotoxicity to the PLA-HA composite. Conversely, incorporation of impact modifier slowed down the rate of cell proliferation on the composite surface but facilitates increased wettability.

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Impact modified PLA-hydroxyapatite composites – Thermo-mechanical properties

Cited by 100 publications

References 31 publications

Micromorphology, mechanical, crystallization and permeability properties analysis of HA/PBAT/PLA (HA, hydroxyapatite; PBAT, poly(butylene adipate‐co‐butylene terephthalate); PLA, polylactide) degradability packaging films

Micromorphology, mechanical, crystallization and permeability properties analysis of HA/PBAT/PLA (HA, hydroxyapatite; PBAT, poly(butylene adipate‐co‐butylene terephthalate); PLA, polylactide) degradability packaging films

The Influence of Wood and Basalt Fibres on Mechanical, Thermal and Hydrothermal Properties of PLA Composites

Synergized poly(lactic acid)–hydroxyapatite composites: Biocompatibility study

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