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A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size

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Published on: October 17, 2016

Plasma-Treated Poly(Lactic Acid): Deciphering the Structure of a Versatile Engineering Material.

Adrián Fontana-Escartín^1,2, Nicolas Simon^1,2, Oscar Bertran³

¹IMEM-BRT Group, Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, 08019 Barcelona, Spain.

|January 1, 2026

Summary

This summary is machine-generated.

Plasma treatment transforms inert poly-(lactic acid) (PLA) into a sensitive electrochemical sensor for bioanalytes like dopamine. This study reveals key chemical and structural changes, enabling new applications in biosensing.

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Area of Science:

Materials Science
Surface Chemistry
Biomedical Engineering

Background:

Conventional thermoplastics offer low-cost engineering solutions but their plasma-induced chemical modifications remain poorly understood.
Poly-(lactic acid) (PLA), typically electrochemically inert, presents an opportunity for functionalization via plasma treatment for advanced applications.

Purpose of the Study:

To investigate the chemical structure alterations in poly-(lactic acid) (PLA) after low-pressure plasma treatment.
To evaluate the performance of plasma-treated PLA as an electrochemical sensor for dopamine detection.
To compare the structural properties of plasma-treated PLA with amorphous and crystalline PLA using atomistic simulations.

Main Methods:

X-ray photoelectron spectroscopy (XPS)
In-depth micro-Raman spectroscopy
Zeta-potential measurements
Electrical resistance and contact angle measurements
Atomistic molecular dynamics simulations

Main Results:

Plasma treatment induced specific functional groups on PLA surfaces up to 10 μm depth.
Significant variations in electrical properties were observed in plasma-treated PLA.
The structure of plasma-treated PLA, including interactions and conformational order, differs from amorphous and crystalline states.

Conclusions:

Low-pressure oxygen plasma treatment effectively functionalizes PLA, enabling its use as an electrochemical sensor for dopamine.
Understanding plasma-induced chemical and structural changes is crucial for optimizing thermoplastic materials in advanced engineering and biosensing applications.