RT Journal Article
T1 Antioxidant PLA Composites Containing Lignin for 3D Printing Applications: A Potential Material for Healthcare Applications
A1 Domínguez Robles, Juan
A1 Martin, Niamh K.
A1 Fong, Mun Leon
A1 Stewart, Sarah A.
A1 Irwin, Nicola J.
A1 Rial Hermida, María Isabel
A1 Donnelly, Ryan F.
A1 Larrañeta, Eneko
K1 3D printing
K1 Fused filament fabrication
K1 Lignin
K1 Antioxidant materials
K1 Wound dressing
AB Lignin (LIG) is a natural biopolymer with well-known antioxidant capabilities. Accordingly, in the present work, a method to combine LIG with poly(lactic acid) (PLA) for fused filament fabrication applications (FFF) is proposed. For this purpose, PLA pellets were successfully coated with LIG powder and a biocompatible oil (castor oil). The resulting pellets were placed into an extruder at 200 °C. The resulting PLA filaments contained LIG loadings ranging from 0% to 3% (w/w). The obtained filaments were successfully used for FFF applications. The LIG content affected the mechanical and surface properties of the overall material. The inclusion of LIG yielded materials with lower resistance to fracture and higher wettabilities. Moreover, the resulting 3D printed materials showed antioxidant capabilities. By using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method, the materials were capable of reducing the concentration of this compound up to ca. 80% in 5 h. This radical scavenging activity could be potentially beneficial for healthcare applications, especially for wound care. Accordingly, PLA/LIG were used to design meshes with different designs for wound dressing purposes. A wound healing model compound, curcumin (CUR), was applied in the surface of the mesh and its diffusion was studied. It was observed that the dimensions of the meshes affected the permeation rate of CUR. Accordingly, the design of the mesh could be modified according to the patient’s needs
PB MDPI
YR 2019
FD 2019
LK http://hdl.handle.net/10347/23881
UL http://hdl.handle.net/10347/23881
LA eng
NO Domínguez-Robles, J.; Martin, N.K.; Fong, M.L.; Stewart, S.A.; Irwin, N.J.; Rial-Hermida, M.I.; Donnelly, R.F.; Larrañeta, E. Antioxidant PLA Composites Containing Lignin for 3D Printing Applications: A Potential Material for Healthcare Applications. Pharmaceutics 2019, 11, 165
NO This work was supported by the Wellcome Trust Biomedical Vacation Scholarship (SS 213361/Z/18/Z) and the Society for Applied Microbiology Student Placement Scholarship
DS Minerva
RD 27 abr 2026