INVESTIGATION OF THE PRODUCTION OF TRICLOSAN/CHITOSAN NANOCAPSULES FOR FUNCTIONAL SURFACE APPLICATIONS

This study focuses on producing monodisperse nanocapsules with a triclosan/chitosan core-shell structure using the coaxial electrospray method. The coaxial electrospraying method enables the production of core/shell structured nanocapsules in a single step. The effects of flow rate, core-to-shell flow rate ratio, and needle size on the coaxial electrospray process were systematically analyzed. The resulting nanocapsule structures were characterized using scanning electron microscope (SEM), transmission electron microscope (TEM) and size measurements. The experiments demonstrated that fibrillation more likely occurred when the chitosan content was highest

Constructing Antibacterial Poly(Lactic Acid)/Chitosan Nanoparticles

Single and coaxial electrospraying techniques are superior nanofabrication methods for nanomaterial production. These nanomaterials have the unique capability to manipulate various surfaces and bring diverse additional functionalities. The objectives of the present study are to produce poly(lactic acid) (PLA)/chitosan nanoparticles and investigate the synergy of nanosize effect with different morphology structures in terms of achieved functionality. The impact of ambient humidity on coating morphology was examined via a scanning electron microscope, field emission scanning electron microscope and dynamic light scattering for size measurements and dimensional characterization of nanoparticles. The obtained results indicate that electrosprayed PLA polymer shows a tendency to have a more distinct pore structure than electrosprayed chitosan polymer. Humidity has an increasing effect on particle size. Another finding is the relationship between hygroscopic characteristics of polymer with nanoparticle size, polydispersity, surface morphology and pore structure. Overall, these methods introduced high antibacterial activity obtainment on electrosprayed surfaces. Up to 99.99% antibacterial activity was accomplished against Escherichia coli ([Formula: see text]) and Staphylococcus aureus (S. aureus) bacteria in regard to this study. The created surface layers also have the extensive potential of practicability for diversified kinds of surfaces and numerous combinations of polymers for multifunctional applications. </jats:p

Investigation of poly(lactic acid) nanocapsules containing the plant extract via coaxial electrospraying method for functional nonwoven applications

This study focuses on the development of functional nanocapsules via the coaxial electrohydrodynamic atomization (electrospraying) method. These nanocapsules can manipulate nonwoven surface functionality in terms of antibacterial characteristics for medical textile purposes. Electrosprayed nanocapsules were produced from Poly(lactic acid) (PLA) polymer and Plumbago europaea plant extract. Here, we employ optimized solution and process parameters (needle to collector distance, electrical field, application time, and needle dimension) for the coaxial electrospraying process. Different Plumbago europaea extract concentrations and co-fluids' flow rates were investigated as part of the study. Also, the effect of these parameters on capsule morphology and dimension were investigated. After the formation of PLA nanocapsules, morphological and dimensional characteristics were analyzed through SEM, FESEM, TEM images in addition to FTIR and nanosize measurements. According to our findings, a lower co-fluids' flow rate gives the smaller nanocapsules with narrow-sized distribution and desired spherical morphology. Antibacterial efficiency doesn't show any significant difference except the lowest plant extract concentrations. After characterizing the nanocapsules' structures, the core-sheath structure can be clearly identified. Consequently, the desired capsule morphology and size for nanocapsules were accomplished. The antibacterial efficiency of covered surfaces with nanocapsules is up to 80% for Staphylococcus aureus and about 31% for Escherichia coli, even with low pick-up ratios. Even for a very low amount of extract usage, good antibacterial efficiency can be achieved. The application has endless potential in terms of higher concentration and a wide range of chemical usage

Investigation of poly(lactic acid) nanocapsules containing the plant extract via coaxial electrospraying method for functional nonwoven applications

This study focuses on the development of functional nanocapsules via the coaxial electrohydrodynamic atomization (electrospraying) method. These nanocapsules can manipulate nonwoven surface functionality in terms of antibacterial characteristics for medical textile purposes. Electrosprayed nanocapsules were produced from Poly(lactic acid) (PLA) polymer and Plumbago europaea plant extract. Here, we employ optimized solution and process parameters (needle to collector distance, electrical field, application time, and needle dimension) for the coaxial electrospraying process. Different Plumbago europaea extract concentrations and co-fluids' flow rates were investigated as part of the study. Also, the effect of these parameters on capsule morphology and dimension were investigated. After the formation of PLA nanocapsules, morphological and dimensional characteristics were analyzed through SEM, FESEM, TEM images in addition to FTIR and nanosize measurements. According to our findings, a lower co-fluids' flow rate gives the smaller nanocapsules with narrow-sized distribution and desired spherical morphology. Antibacterial efficiency doesn't show any significant difference except the lowest plant extract concentrations. After characterizing the nanocapsules' structures, the core-sheath structure can be clearly identified. Consequently, the desired capsule morphology and size for nanocapsules were accomplished. The antibacterial efficiency of covered surfaces with nanocapsules is up to 80% for Staphylococcus aureus and about 31% for Escherichia coli, even with low pick-up ratios. Even for a very low amount of extract usage, good antibacterial efficiency can be achieved. The application has endless potential in terms of higher concentration and a wide range of chemical usage

Investigation of poly(lactic acid) nanocapsules containing the plant extract via coaxial electrospraying method for functional nonwoven applications

This study focuses on the development of functional nanocapsules via the coaxial electrohydrodynamic atomization (electrospraying) method. These nanocapsules can manipulate nonwoven surface functionality in terms of antibacterial characteristics for medical textile purposes. Electrosprayed nanocapsules were produced from Poly(lactic acid) (PLA) polymer and Plumbago europaea plant extract. Here, we employ optimized solution and process parameters (needle to collector distance, electrical field, application time, and needle dimension) for the coaxial electrospraying process. Different Plumbago europaea extract concentrations and co-fluids’ flow rates were investigated as part of the study. Also, the effect of these parameters on capsule morphology and dimension were investigated. After the formation of PLA nanocapsules, morphological and dimensional characteristics were analyzed through SEM, FESEM, TEM images in addition to FTIR and nanosize measurements. According to our findings, a lower co-fluids’ flow rate gives the smaller nanocapsules with narrow-sized distribution and desired spherical morphology. Antibacterial efficiency doesn’t show any significant difference except the lowest plant extract concentrations. After characterizing the nanocapsules’ structures, the core-sheath structure can be clearly identified. Consequently, the desired capsule morphology and size for nanocapsules were accomplished. The antibacterial efficiency of covered surfaces with nanocapsules is up to 80% for Staphylococcus aureus and about 31% for Escherichia coli, even with low pick-up ratios. Even for a very low amount of extract usage, good antibacterial efficiency can be achieved. The application has endless potential in terms of higher concentration and a wide range of chemical usage. </jats:p