Study of parameter affecting morphology of electrospun poly (lactic acid) (PLA) fibers loaded with Ag/CaCO₃ filler

Abstract

Silver nanoparticles (AgNPs) are widely used as antimicrobial agent in commercial products like textiles, cosmetics and drugs. AgNPs deposited on the surface of calcium carbonate (CaCO3) particles, serve as sustained release of antimicrobial activity. The silver nanoparticles embedded calcium carbonate particles (Ag/CaCO3) are prepared by a precipitation method. In this study, precipitated (Ag/CaCO3) filler will be used for preparation of Ag/CaCO3-poly(L-lactic acid) (Ag/CaCO3-PLA) nanofibers by electrospinning. Polymer concentration and functional filler amount in binary solvent system will be studied. The condition for fabricating electrospun PLA and Ag/CaCO3-PLA was a 15 cm of collection distance and 15 kV of working voltage. Morphology of Ag/CaCO3 loaded PLA electrospun fibers will be investigated by the field emission scanning electron microscope (FE-SEM). The electrospun fibers will be further applied as the antimicrobial material.

Upcycled Polyvinyl Chloride (PVC) Electrospun Nanofibers from Waste PVC-Based Materials for Water Treatment

“…The CaCO 3 aggregation was confirmed by detecting clusters of CaCO 3 with a higher number of CaCO 3 particles inside the beads compared to the rest of the fibers (Figure 9). 49 In addition, the higher number of beads in 8% CaCO 3 -RG and 3% CaCO 3 -RG fibers compared to the RG PVC confirmed the effect of CaCO 3 and viscosity on the bead formation. The centrifuged PVC pipe fibers showed a lower number of beads compared to all the CaCO 3 -containing samples, which confirmed that the removal of CaCO 3 by centrifugation resulted in less bead formation.…”

“…The stretching force to elongate the solution is represented by the charge density on the electrospinning jet. Inadequate charge density causes insufficient elongation viscosity to counteract Rayleigh instability, resulting in the formation of beads. , Also, additives might affect the bead formation based on their solubility in the solvent. − …”

“…The presence of insoluble additives (e.g., CaCO 3 ) leads to additive particles blooming along the fiber due to a higher degree of the local particle agglomeration during the electrospinning process, which can lead to increased bead formation. The local particle agglomeration might be caused by a heterogeneous distribution of the particles in casting solutions during electrospinning Figure shows that PVC pipe fibers possessed a higher number of beads than the RG fibers.…”

“…The local particle agglomeration might be caused by a heterogeneous distribution of the particles in casting solutions during electrospinning. 49 Figure 8 shows that PVC pipe fibers possessed a higher number of beads than the RG fibers. The viscosity of the PVC pipe was lower than that of RG PVC (Figure 3), while the conductivity of the PVC pipe was higher than that of RG (Figure 4).…”

Biogenic calcium carbonate derived from waste shells for advanced material applications: A review

“…In addition, the results from the antimicrobial study showed that the films have bacteriostatic effects on Salmonella Enteritidis and Listeria Monocytogenes bacteria. In another similar study, the silver nanoparticles were embedded in calcium carbonate particles (Ag/CaCO 3 ) by a precipitation method and further loaded in poly (L-lactic acid) nanofibers by electrospinning technique with potential usage for antimicrobial food adsorbent pads application (Zin and Sutapun, 2022). This is worthy of mentioning that all of the research works available in the literature reported the chemical or physical treatment methods to reduce the size or modify eggshell particles to decrease the surface tension between eggshell particles and polymer matrix.…”