Effect of the Interior Fill Percentage on the Deterioration of the Mechanical Properties of FFF-3D-Printed PLA Structures

Polymers, Journal Year: 2025, Volume and Issue: 17(6), P. 828 - 828

Published: March 20, 2025

Poly (lactic acid) (PLA), a biodegradable polymer, is widely used in medical applications, particularly for 3D-printed tissue engineering scaffolds. The fused filament fabrication (FFF) 3D printer an available processing tool PLA. nozzle scan pattern and interior fill percentage (IFP) considerably influence the mechanical properties of formed structures may have dominant effects on rates at which PLA deteriorate. When IFP set to low value, such as 80%, internal gaps form within structure, leading different deterioration patterns compared under 100% condition. In this study, we fabricated test pieces with FFF using three patterns. After immersing phosphate buffer saline (PBS) up 120 days, water content was measured underwent tensile testing determine strength, elastic modulus, breaking energy. Both rate uptake varied among fabrication. For gaps, proceeded two stages. faster than that fully filled structures. data obtained study will be useful design applied engineering.

Language: Английский

Production of hydroxyapatite coating on 3D printed PLA parts by powder bed annealing

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

The development of effective and biocompatible coatings for polymeric implants is crucial advancing orthopedic solutions. This study investigates the feasibility employing powder bed annealing to deposit hydroxyapatite (HA) on 3D-printed polylactic acid (PLA) parts. proposed method provides a cost-effective scalable alternative conventional coating techniques. experimental process involved immersing PLA parts in submicrometric ceramic followed by thermal treatment induce adhesion diffusion HA particles into polymer surface. results demonstrated that successfully generated uniform particulate coating, significantly enhancing surface roughness, wettability, hydrophilicity substrate. Mechanical characterization revealed an increase flexural strength microhardness, while maintaining impact resistance. However, slight reduction ductility was observed. Biocompatibility tests confirmed coated samples supported cell proliferation, suggesting their potential promoting osseointegration biomedical applications. Compared existing methods, allows direct integration bioactive onto without requiring complex post-processing. Additionally, combination PLA’s biodegradability with HA’s osteoinductive properties suggests promising applications resorbable bone regeneration. contributes ongoing innovation coatings, offering practical pathway accessible personalized implants.

Language: Английский

Protein and Polysaccharide Fibers via Air Jet Spinning: Emerging Techniques for Biomedical and Sustainable Applications

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(24), P. 13282 - 13282

Published: Dec. 11, 2024

Polymers play a critical role in the biomedical and sustainable materials fields, serving as key resources for both research product development. While synthetic natural polymers are widely used, have traditionally dominated due to their ability meet specific material requirements of most fiber fabrication methods. However, derived from non-renewable resources, production raises environmental health concerns. Natural polymers, on other hand, renewable biological sources include subset known biopolymers, such proteins polysaccharides, which produced by living organisms. These biopolymers naturally abundant offer benefits biodegradability non-toxicity, making them especially suitable green applications. Recently, air jet spinning has emerged promising method fabricating biopolymer fibers, valued its simplicity, cost-effectiveness, safety-advantages that stand out compared more conventional electrospinning process. This review examines methods mechanisms spinning, drawing empirical studies practical insights highlight advantages over traditional techniques. By assembling into micro- nanofibers, this novel demonstrates strong potential targeted applications, including tissue engineering, drug delivery, filtration, food packaging, biosensing, utilizing various protein polysaccharide sources.

Language: Английский