Poly-lactic acid coatings on the biomedical WE43 Mg alloy: Protection mechanism and ion permeation effects

Jianwei Dai; Changqing Wu; Juyi Yang; Lu Zhang; Qiangsheng Dong; Linyuan Han; Xuan Li; Jing Bai; Feng Xue; Paul K. Chu; Chenglin Chu

doi:10.1016/j.porgcoat.2023.107427

Poly-lactic acid coatings on the biomedical WE43 Mg alloy: Protection mechanism and ion permeation effects

Jianwei Dai, Changqing Wu, Juyi Yang, Lu Zhang, Qiangsheng Dong, Linyuan Han, Xuan Li, Jing Bai, Feng Xue, Paul K. Chu, Chenglin Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

24 Citations (Scopus)

Abstract

Poly-lactic acid (PLA) coatings are deposited on the biomedical WE43 Mg alloy and the degradation behavior and mechanism are investigated during 504 h immersion in Hanks' solution. The protection mechanism is investigated by studying the ion permeation phenomenon and a custom in situ apparatus is constructed to evaluate the performance and elucidate the underlying principle. Na⁺ and Cl⁻ penetrate the PLA membrane gradually and the different permeation effects stem from the different hydrated radii. Ion permeation can be separated into three stages. Penetration of Cl⁻ is dominant in the first stage and Na⁺ dominates in the third stage. Penetration of Ca²⁺, PO₄³⁻ along with other ions also take part in the third stage leading to the formation of Ca−P on the WE43 substrate. Based on the experimental results, models are established to describe the ion permeation behavior through the PLA membrane and predict the protection efficiency of the PLA coating. The results enrich our understanding of ion permeation in polymeric coatings and provide insights into the development of Mg-based biomedical implants. © 2023 Elsevier B.V.

Original language	English
Article number	107427
Journal	Progress in Organic Coatings
Volume	177
Online published	21 Jan 2023
DOIs	https://doi.org/10.1016/j.porgcoat.2023.107427
Publication status	Published - Apr 2023

Funding

This research was supported by the National Natural Science Foundation of China (Grant No. 52171236), the Open Research Fund of Jiangsu Key Laboratory for Advanced Metallic Materials (Grant No. AMM2021A01), Postgraduate Research & Practice Innovation Program of Jiangsu Province (Grant No. KYCX20_0091), City University of Hong Kong Donation Research Grant (Grant No. DON-RMG 9229021), Hong Kong PDFS - RGC Postdoctoral Fellowship Scheme (Grant No. PDFS2122-1S08 and CityU 9061014), and Hong Kong HMRF (Health and Medical Research Fund) (Grant No. 2120972 and CityU 9211320).

Research Keywords

Corrosion
Degradation behavior
Ion permeation
Magnesium alloy
Poly-lactic acid coating

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RGC-funded

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10.1016/j.porgcoat.2023.107427

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@article{45afd3ee61bc44a7a969a7a7d7359a53,

title = "Poly-lactic acid coatings on the biomedical WE43 Mg alloy: Protection mechanism and ion permeation effects",

abstract = "Poly-lactic acid (PLA) coatings are deposited on the biomedical WE43 Mg alloy and the degradation behavior and mechanism are investigated during 504 h immersion in Hanks' solution. The protection mechanism is investigated by studying the ion permeation phenomenon and a custom in situ apparatus is constructed to evaluate the performance and elucidate the underlying principle. Na+ and Cl− penetrate the PLA membrane gradually and the different permeation effects stem from the different hydrated radii. Ion permeation can be separated into three stages. Penetration of Cl− is dominant in the first stage and Na+ dominates in the third stage. Penetration of Ca2+, PO43− along with other ions also take part in the third stage leading to the formation of Ca−P on the WE43 substrate. Based on the experimental results, models are established to describe the ion permeation behavior through the PLA membrane and predict the protection efficiency of the PLA coating. The results enrich our understanding of ion permeation in polymeric coatings and provide insights into the development of Mg-based biomedical implants. {\textcopyright} 2023 Elsevier B.V.",

keywords = "Corrosion, Degradation behavior, Ion permeation, Magnesium alloy, Poly-lactic acid coating",

author = "Jianwei Dai and Changqing Wu and Juyi Yang and Lu Zhang and Qiangsheng Dong and Linyuan Han and Xuan Li and Jing Bai and Feng Xue and Chu, {Paul K.} and Chenglin Chu",

year = "2023",

month = apr,

doi = "10.1016/j.porgcoat.2023.107427",

language = "English",

volume = "177",

journal = "Progress in Organic Coatings",

issn = "0300-9440",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Poly-lactic acid coatings on the biomedical WE43 Mg alloy

T2 - Protection mechanism and ion permeation effects

AU - Dai, Jianwei

AU - Wu, Changqing

AU - Yang, Juyi

AU - Zhang, Lu

AU - Dong, Qiangsheng

AU - Han, Linyuan

AU - Li, Xuan

AU - Bai, Jing

AU - Xue, Feng

AU - Chu, Paul K.

AU - Chu, Chenglin

PY - 2023/4

Y1 - 2023/4

N2 - Poly-lactic acid (PLA) coatings are deposited on the biomedical WE43 Mg alloy and the degradation behavior and mechanism are investigated during 504 h immersion in Hanks' solution. The protection mechanism is investigated by studying the ion permeation phenomenon and a custom in situ apparatus is constructed to evaluate the performance and elucidate the underlying principle. Na+ and Cl− penetrate the PLA membrane gradually and the different permeation effects stem from the different hydrated radii. Ion permeation can be separated into three stages. Penetration of Cl− is dominant in the first stage and Na+ dominates in the third stage. Penetration of Ca2+, PO43− along with other ions also take part in the third stage leading to the formation of Ca−P on the WE43 substrate. Based on the experimental results, models are established to describe the ion permeation behavior through the PLA membrane and predict the protection efficiency of the PLA coating. The results enrich our understanding of ion permeation in polymeric coatings and provide insights into the development of Mg-based biomedical implants. © 2023 Elsevier B.V.

AB - Poly-lactic acid (PLA) coatings are deposited on the biomedical WE43 Mg alloy and the degradation behavior and mechanism are investigated during 504 h immersion in Hanks' solution. The protection mechanism is investigated by studying the ion permeation phenomenon and a custom in situ apparatus is constructed to evaluate the performance and elucidate the underlying principle. Na+ and Cl− penetrate the PLA membrane gradually and the different permeation effects stem from the different hydrated radii. Ion permeation can be separated into three stages. Penetration of Cl− is dominant in the first stage and Na+ dominates in the third stage. Penetration of Ca2+, PO43− along with other ions also take part in the third stage leading to the formation of Ca−P on the WE43 substrate. Based on the experimental results, models are established to describe the ion permeation behavior through the PLA membrane and predict the protection efficiency of the PLA coating. The results enrich our understanding of ion permeation in polymeric coatings and provide insights into the development of Mg-based biomedical implants. © 2023 Elsevier B.V.

KW - Corrosion

KW - Degradation behavior

KW - Ion permeation

KW - Magnesium alloy

KW - Poly-lactic acid coating

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85149774859&origin=recordpage

U2 - 10.1016/j.porgcoat.2023.107427

DO - 10.1016/j.porgcoat.2023.107427

M3 - RGC 21 - Publication in refereed journal

SN - 0300-9440

VL - 177

JO - Progress in Organic Coatings

JF - Progress in Organic Coatings

M1 - 107427

ER -

Poly-lactic acid coatings on the biomedical WE43 Mg alloy: Protection mechanism and ion permeation effects

Abstract

Funding

Research Keywords

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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

HMRF: Biocompatible Titanium Implants with Antibacterial Capability Arising from the Synergistic Effects of Mechanical and Electrical Interactions and Quantitative Bacteria Sensing Ability Based on Electron Transfer

Cite this

Poly-lactic acid coatings on the biomedical WE43 Mg alloy: Protection mechanism and ion permeation effects

Abstract

Funding

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS

HMRF: Biocompatible Titanium Implants with Antibacterial Capability Arising from the Synergistic Effects of Mechanical and Electrical Interactions and Quantitative Bacteria Sensing Ability Based on Electron Transfer

Cite this