Journal
QUANTUM ELECTRONICS
Volume 45, Issue 11, Pages 1023-1028Publisher
TURPION LTD
DOI: 10.1070/QE2015v045n11ABEH015817
Keywords
surface-selective laser sintering; three-dimensional polymer structures; water; wettability
Funding
- RF Government Grants' Council [14.B25.31.0019]
- Russian Foundation for Basic Research [13-02-12041, 13-02-01256]
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We report the implementation of a novel scheme for surface-selective laser sintering (SSLS) of polymer particles, based on using water as a sensitizer of laser heating and sintering of particles as well as laser radiation at a wavelength of 1.94 mm, corresponding to the strong absorption band of water. A method of sintering powders of poly(lactide-co-glycolide), a hydrophobic bioresorbable polymer, after modifying its surface with an aqueous solution of hyaluronic acid is developed. The sintering thresholds for wetted polymer are by 3-4 times lower than those for sintering in air. The presence of water restricts the temperature of the heated polymer, preventing its thermal destruction. Polymer matrices with a developed porous structure are obtained. The proposed SSLS method can be applied to produce bioresorbable polymer matrices for tissue engineering.
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