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IJAT Vol.11 No.6 pp. 932-940
doi: 10.20965/ijat.2017.p0932
(2017)

Paper:

Influence of Early-Stage Hydrolysis on Tensile Fracture Behavior of HAp/PLA Composites Interface-Controlled by Reaction Control Utilizing Photodissociable Protecting Groups

Mototsugu Tanaka*,†, Tomoyuki Takahashi**, and Isao Kimpara***

*Department of Mechanical Engineering, Kanazawa Institute of Technology
Ohgigaoka 7-1, Nonoichi, Japan

Corresponding author

**Kanazawa Institute of Technology, Nonoichi, Japan

***Research Laboratory for Integrated Technological Systems, Kanazawa Institute of Technology, Hakusan, Japan

Received:
January 31, 2017
Accepted:
May 9, 2017
Online released:
October 31, 2017
Published:
November 5, 2017
Keywords:
HAp/PLA composites, scaffold, interface control, hydrolysis, fracture behavior
Abstract

In this study, the change in the tensile fracture behavior of HAp/PLA composites, interface-controlled using pectin and chitosan, was evaluated for the case of the early-stage hydrolysis. Here, the reaction between the HAp particles and modification polymers was controlled using o-nitrobenzyl alcohol. Tensile tests after immersion in a pseudo biological environment indicated that the interface-control method employed in this study improved the fracture properties of HAp/PLA composites significantly, inducing the large plastic deformation. In addition, the effects of early-stage hydrolysis on fracture behavior and mechanism are discussed from the viewpoint of interfacial structures for the interface-controlled HAp/PLA composites. Observations of fracture morphologies and surfaces suggest that the interface-control employed in this study successfully improved interfacial bonding, enabling the effective usage of the deformability of the PLA matrix. The interface-control method employed in this study also maximized the fracture strain through the combination of improved interfacial bonding and an increase in the ductility of the PLA matrix after a 2-week immersion. Test results also suggest that the cancelation induced by the degradation of chitosan accelerated the degradation of the PLA matrix after a longer immersion.

Cite this article as:
M. Tanaka, T. Takahashi, and I. Kimpara, “Influence of Early-Stage Hydrolysis on Tensile Fracture Behavior of HAp/PLA Composites Interface-Controlled by Reaction Control Utilizing Photodissociable Protecting Groups,” Int. J. Automation Technol., Vol.11, No.6, pp. 932-940, 2017.
Data files:
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Last updated on Dec. 11, 2018