Abstract
The use of surface-selective laser sintering is considered for creating and modifying the architecture of three-dimensional structures from biocompatible and bioresorbable polylactide materials. The approach allows to eliminate the thermal degradation of sintered materials by localizing heating processes on their surfaces. This is achieved via the selective absorption of mid-infrared laser radiation (1.9 μm) by a thin layer of water droplets deposited on the surfaces of polymer particles (polymer fibers) or the use of hygroscopic coatings that absorb the energy of laser radiation better than the polymer material.
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Funding
This work was supported by the Russian Foundation for Basic Research, project nos. 18-29-17050 (designing nonwoven materials via electrospinning) and no. 18-32-20184 (developing the technology of surface-selective laser sintering); by the RF Ministry of Science and Higher Education as part of a State Task for the Federal Scientific Research Center of Crystallography and Photonics in the development of laser additive technologies; and by the Enikolopov Institute of Synthetic Polymeric Materials as part of Russian Academic Excellence Project 5–100 in the study of materials made from aliphatic polyesters.
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In memory of V. N. Bagratashvili
Translated by I. Obrezanova
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Minaev, N.V., Demina, T.S., Minaeva, S.A. et al. The Evolution of Surface-Selective Laser Sintering: Modifying and Forming 3D Structures for Tissue Engineering. Bull. Russ. Acad. Sci. Phys. 84, 1315–1320 (2020). https://doi.org/10.3103/S1062873820110192
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DOI: https://doi.org/10.3103/S1062873820110192