Characterization of Two Types of Polylactic Acid Coating Loaded with Gentamicin Sulphate Deposed on AZ31 Alloy

Voicu, Manuela Elena; Ioniță, Daniela; Buica, George‐Octavian; Drăgănescu, Doina; Anuța, Valentina; Raduly, Florentina Monica; Demetrescu, Ioana

doi:10.3390/coatings13061105

Cited by 2 publications

(2 citation statements)

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“…Polymers 2024, 16, x FOR PEER REVIEW 11 of spinning, concluding that dip coating favors coating adhesion compared to electrospi ning [57]. Further studies must be performed to evaluate coating adhesion and to pro the importance of minimal surface roughness.…”

Section: Parameters Selectedmentioning

confidence: 99%

“…For example, the substrate must be clean, and its roughness must be minimal compared to the thickness of the coating for good coating adhesion [55,56]. Voicu et al (2023) analyzed the adhesion of the PLA coating on the AZ31 substrate by comparing coatings deposited by dip coating and electrospinning, concluding that dip coating favors coating adhesion compared to electrospinning [57]. Further studies must be performed to evaluate coating adhesion and to prove the importance of minimal surface roughness.…”

Section: Parameters Selectedmentioning

confidence: 99%

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A Study of PLA Thin Film on SS 316L Coronary Stents Using a Dip Coating Technique

Macías-Naranjo,

Sánchez-Domínguez,

Rubio-Valle

et al. 2024

Polymers

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The dip coating process is one of the recognized techniques used to generate polymeric coatings on stents in an easy and low-cost way. However, there is a lack of information about the influence of the process parameters of this technique on complex geometries such as stents. This paper studies the dip coating process parameters used to provide a uniform coating of PLA with a 4–10 µm thickness. A stainless-steel tube (AISI 316L) was laser-cut, electropolished, and dip-coated in a polylactic acid (PLA) solution whilst changing the process parameters. The samples were characterized to examine the coating’s uniformity, thickness, surface roughness, weight, and chemical composition. FTIR and Raman investigations indicated the presence of PLA on the stent’s surface, the chemical stability of PLA during the coating process, and the absence of residual chloroform in the coatings. Additionally, the water contact angle was measured to determine the hydrophilicity of the coating. Our results indicate that, when using entry and withdrawal speeds of 500 mm min−1 and a 15 s immersion time, a uniform coating thickness was achieved throughout the tube and in the stent with an average thickness of 7.8 µm.

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Section: Parameters Selectedmentioning

confidence: 99%