Achieving high mechanical properties of biodegradable vascular stents by four-axis 3D printing system and heat treatment

Xingrui Tong; Zhongsen Zhang; Kunkun Fu; Yan Li; Bingyan Cao; Wenzhao Wang; Biqiong Chen

doi:10.1016/j.matlet.2023.134261

Achieving high mechanical properties of biodegradable vascular stents by four-axis 3D printing system and heat treatment

Xingrui Tong, Zhongsen Zhang^*, Kunkun Fu, Yan Li^*, Bingyan Cao, Wenzhao Wang, Biqiong Chen

^*Corresponding author for this work

School of Mechanical and Aerospace Engineering

Research output: Contribution to journal › Letter › peer-review

Abstract

This study fabricated biodegradable polylactic acid (PLA) stents with extremely smooth surfaces by a four-axis printing system. Isothermal heat treatment has been carried out on the 3D-printed stent in a salt bath. The crystallinity of PLA has increased by 212% after heat treatment. Compared to the untreated stent, the heat-treated stent has an 11% higher radial supporting stiffness and a 33% higher maximum radial supporting load. The stent can also withstand bending deformation more safely by eliminating residual strain through heat treatment. These results suggest that the isothermal heat treatment is an effective technique for enhancing the load-bearing capacities of 3D-printed PLA stents.

Original language	English
Article number	134261
Journal	Materials Letters
Volume	341
Early online date	27 Mar 2023
DOIs	https://doi.org/10.1016/j.matlet.2023.134261
Publication status	Early online date - 27 Mar 2023

Bibliographical note

Funding Information:
The authors would like to acknowledge the financial support from the National Nature Science Foundation of China (grant number: 12002239 , 12132011 , 12061130201 ), and the Royal Society-Newton Advanced Fellowship (grant number: NAF\R1\201132)

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

3D-printing
Biodegradable stent
Heat treatment
Mechanical properties

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2023.134261Licence: Unspecified

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Achieving high mechanical properties of biodegradable vascular stents by four-axis 3D printing system and heat treatment
Accepted author manuscript, 1.97 MB
Licence: CC BY-NC-ND
Embargo ends: 27/03/2025

Cite this

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title = "Achieving high mechanical properties of biodegradable vascular stents by four-axis 3D printing system and heat treatment",

abstract = "This study fabricated biodegradable polylactic acid (PLA) stents with extremely smooth surfaces by a four-axis printing system. Isothermal heat treatment has been carried out on the 3D-printed stent in a salt bath. The crystallinity of PLA has increased by 212% after heat treatment. Compared to the untreated stent, the heat-treated stent has an 11% higher radial supporting stiffness and a 33% higher maximum radial supporting load. The stent can also withstand bending deformation more safely by eliminating residual strain through heat treatment. These results suggest that the isothermal heat treatment is an effective technique for enhancing the load-bearing capacities of 3D-printed PLA stents.",

keywords = "3D-printing, Biodegradable stent, Heat treatment, Mechanical properties",

author = "Xingrui Tong and Zhongsen Zhang and Kunkun Fu and Yan Li and Bingyan Cao and Wenzhao Wang and Biqiong Chen",

note = "Funding Information: The authors would like to acknowledge the financial support from the National Nature Science Foundation of China (grant number: 12002239 , 12132011 , 12061130201 ), and the Royal Society-Newton Advanced Fellowship (grant number: NAF\R1\201132) Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

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doi = "10.1016/j.matlet.2023.134261",

language = "English",

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journal = "Materials Letters",

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T1 - Achieving high mechanical properties of biodegradable vascular stents by four-axis 3D printing system and heat treatment

AU - Tong, Xingrui

AU - Zhang, Zhongsen

AU - Fu, Kunkun

AU - Li, Yan

AU - Cao, Bingyan

AU - Wang, Wenzhao

AU - Chen, Biqiong

N1 - Funding Information: The authors would like to acknowledge the financial support from the National Nature Science Foundation of China (grant number: 12002239 , 12132011 , 12061130201 ), and the Royal Society-Newton Advanced Fellowship (grant number: NAF\R1\201132) Publisher Copyright: © 2023 Elsevier B.V.

PY - 2023/3/27

Y1 - 2023/3/27

N2 - This study fabricated biodegradable polylactic acid (PLA) stents with extremely smooth surfaces by a four-axis printing system. Isothermal heat treatment has been carried out on the 3D-printed stent in a salt bath. The crystallinity of PLA has increased by 212% after heat treatment. Compared to the untreated stent, the heat-treated stent has an 11% higher radial supporting stiffness and a 33% higher maximum radial supporting load. The stent can also withstand bending deformation more safely by eliminating residual strain through heat treatment. These results suggest that the isothermal heat treatment is an effective technique for enhancing the load-bearing capacities of 3D-printed PLA stents.

AB - This study fabricated biodegradable polylactic acid (PLA) stents with extremely smooth surfaces by a four-axis printing system. Isothermal heat treatment has been carried out on the 3D-printed stent in a salt bath. The crystallinity of PLA has increased by 212% after heat treatment. Compared to the untreated stent, the heat-treated stent has an 11% higher radial supporting stiffness and a 33% higher maximum radial supporting load. The stent can also withstand bending deformation more safely by eliminating residual strain through heat treatment. These results suggest that the isothermal heat treatment is an effective technique for enhancing the load-bearing capacities of 3D-printed PLA stents.

KW - 3D-printing

KW - Biodegradable stent

KW - Heat treatment

KW - Mechanical properties

U2 - 10.1016/j.matlet.2023.134261

DO - 10.1016/j.matlet.2023.134261

M3 - Letter

AN - SCOPUS:85150862236

VL - 341

JO - Materials Letters

JF - Materials Letters

SN - 0167-577X

M1 - 134261

ER -

Achieving high mechanical properties of biodegradable vascular stents by four-axis 3D printing system and heat treatment

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Embargoed Document

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