Open AccessUltra-fast laser modification of poly-lactic acid (PLA) -towards enhanced biocompatibility
Author(s) -
Liliya Angelova,
A. Daskalova,
Rosica Mincheva,
X. Carette,
Anton Trifonov,
E Filipov,
Dante Maria Aceti,
Ivan Buchvarov
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2240/1/012042
Subject(s) - laser , materials science , biocompatibility , lactic acid , femtosecond , surface modification , contact angle , surface roughness , biomedical engineering , fourier transform infrared spectroscopy , scanning electron microscope , composite material , chemical engineering , optics , medicine , physics , biology , bacteria , metallurgy , genetics , engineering
In this study, the interaction was investigated of femtosecond laser radiation (pulse duration τ = 130 fs, wavelength λ = 800 nm) with poly-lactic acid (PLA) 2D scaffolds. Two sets of laser fluences (F) and scanning speed (V) values were applied to PLA matrices - F = 1.66 J/cm 2 , V = 3.8 mm/s, and F = 0.83 J/cm 2 , V = 3.8 mm/s. The PLA samples thickness, roughness, and water contact angle (WCA) were characterized before and after the laser structuring. The fs-induced micro structures were investigated by SEM, EDX, and FTIR analyses. Preliminary cell fibroblast studies were performed. The results obtained clearly show that a precise laser surface structuring could orient the cells matrix ingrowth and thus make PLA bone tissue engineering interbody future application more successful and adaptable to the personal needs of the recipients.