This work studied the potential of centrifugal spinning for the production of fibrous materials based on poly(D,L‐lactic acid) (PDLLA) and poly(3‐hydroxybutyrate) (PHB) with hydroxyapatite nanoparticles (n‐Hap). The influence of n‐Hap concentration (5, 10, and 15 wt.%) and spinneret angular speed on the final fiber morphology were analyzed. Further experimental evaluations were implemented to determine the effect of n‐Hap on the thermal and mechanical performance. The optimum parameters that show a balance among high yield production of homogeneous fibers with the smallest fiber average diameter were found to be at 5 wt.% of n‐Hap processed at 7000 rpm for PDLLA, and 5, 10, and 15 wt.% of n‐Hap at 6000 rpm for PHB. The thermal stability, for both systems, was not significantly affected. The mechanical performance of PHB systems was improved with the addition of n‐Hap. Osteoblast cell viability tests depicted a favorable cell response on the PDLLA systems.
This study addresses the processing of nonwoven fibrous materials obtained by centrifugal spinning method, namely Forcespinning; a high yield and low production cost technique little explored in this field. Poly(D, L‐lactic acid) (PDLLA) and poly(3‐hydroxybutyrate) (PHB) were used as matrices and reinforced with zinc oxide nanoparticles (n‐ZnO). The morphology, mechanical, and thermal performance of the developed composites were analyzed as well as the antibacterial effect of n‐ZnO. Fibrous materials with n‐ZnO concentrations of 1, 3, and 5 wt. % for PDLLA and 1 and 3 wt. % for PHB were evaluated. The results showed that the incorporation of n‐ZnO produces an increase in the viscosity of the precursor solutions for both polymeric systems, which caused an increase in the average fiber diameter, though the morphology was not affected, obtaining mostly long, continuous, and homogenous fibers. In addition, a decrease in thermal stability was observed to a greater extent in PDLLA systems. Regarding the mechanical performance, optimal properties were obtained at a concentration of 3 and 1 wt. % of n‐ZnO for PDLLA and PHB, respectively. Antibacterial studies showed that PHB with 1 and 3 wt. % of n‐ZnO effectively combat strains of
- PAR ID:
- 10457032
- Publisher / Repository:
- Wiley Blackwell (John Wiley & Sons)
- Date Published:
- Journal Name:
- Polymers for Advanced Technologies
- Volume:
- 31
- Issue:
- 11
- ISSN:
- 1042-7147
- Page Range / eLocation ID:
- p. 2601-2614
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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ABSTRACT This work addresses a systematic study for the process development and optimization of poly(
d ,l ‐lactic acid) (PDLLA) submicrometer fibers utilizing the centrifugal spinning technique known as Forcespinning. This study analyzes the effect of polymer concentration (8, 10, and 12 wt %) and angular speed on the fiber morphology, diameter distribution, and fiber yield. The increase in polymer concentration and angular speed favored the formation of continuous and homogeneous submicrometer fibers with an absence of bead formation and higher output. The optimal conditions were established considering the morphological characteristics that exhibit a greater surface area (homogeneous and submicrometer fibers); and they were achieved at a polymer concentration of 10 wt % at an angular speed ranging from 8000 to 10 000 rpm. Optimization of PDLLA submicrometer fiber fabrication lays the groundwork for scaling up the process and serves as a platform to further develop promising applications of PDLLA nonwoven mats, particularly in the biomedical area such as in scaffolds for tissue engineering. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019 ,136 , 47643. -
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