Surface Modification of Ni–Ti Stents by Biodegradable Binary PVA/Propolis Electrospun Nano Fibers

Mutuk, Tuğba; Gürbüz, Mevlüt

doi:10.1007/s13369-022-07179-5

Cited by 2 publications

(4 citation statements)

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“…A similar behavior was reported for PVA/propolis nanofibers, which were electrospun on a commercial Ni–Ti stent [ 46 ]. The decomposition temperature of PVA/propolis composites dropped sharply with increasing the propolis content from 0 to 4% [ 46 ]. In addition, bacterial nanocellulose hydrogels containing different amounts of propolis and methylene blue as a photosensitizer, which were developed for wound healing, showed a decrease in thermal stability with the increase in propolis content [ 27 ].…”

Section: Resultssupporting

confidence: 76%

“…It may be remarked that the order in which the NC/PE sponges enter the degradation process is opposite to the increase in propolis concentration, T 5%, and T on increasing in the order NC/PE 4/4 <NC/PE 4/3 <NC/PE 4/2. A similar behavior was reported for PVA/propolis nanofibers, which were electrospun on a commercial Ni-Ti stent [46]. The decomposition temperature of PVA/propolis composites dropped sharply with increasing the propolis content from 0 to 4% [46].…”

Section: Thermogravimetric Analysis (Tga)supporting

confidence: 78%

“…Similar results were reported for rice starch/carboxymethyl chitosan (RS/CMCh) films containing PE, where the inhibition zone measured from the edge of the sample (~1.1 mm) was close for the films containing 5 and 10% PE [ 52 ]. The antibacterial activity of the NC/PE sponges is due to the active compounds in propolis, such as flavonoids, aromatic compounds, and terpenoids, which have the ability to destroy the cell structure [ 46 ]. Previous studies have shown that quercetin, apigenin, caffeic acid, and coumaric acid, which are all components of propolis, are responsible for decreasing bacterial mobility and adenosine triphosphate production, for the inhibition of bacterial cell division and the increase in the cell membrane permeability [ 57 , 58 ].…”

Section: Resultsmentioning

confidence: 99%

“…The thermal stability of propolis is low, as it begins to release water and volatile compounds just above room temperature [45][46][47]. Therefore, propolis addition in NC sponges could influence their thermal stability, which is an important characteristic for biomedical and food applications.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

See 3 more Smart Citations

Plant-Derived Nanocellulose with Antibacterial Activity for Wound Healing Dressing

Oprică,

Panaitescu,

Lixandru

et al. 2023

Pharmaceutics

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The medical sector is one of the biggest consumers of single-use materials, and while the insurance of sterile media is non-negotiable, the environmental aspect is a chronic problem. Nanocellulose (NC) is one of the safest and most promising materials that can be used in medical applications due to its valuable properties like biocompatibility and biodegradability, along with its good mechanical properties and high water uptake capacity. However, NC has no bactericidal activity, which is a critical need for the effective prevention of infections in chronic diabetic wound dressing applications. Therefore, in this work, a natural product, propolis extract (PE), was used as an antibacterial agent, in different amounts, together with NC to obtain sponge-like structures (NC/PE). The scanning electron microscope (SEM) images showed well-impregnated cellulose fibers and a more compact structure with the addition of PE. According to the thermogravimetric analysis (TGA), the samples containing PE underwent thermal degradation before the unmodified NC due to the presence of volatile compounds in the extract. However, the peak degradation temperature in the first derivative thermogravimetric curves was higher for all the sponges containing PE when compared to the unmodified NC. The antibacterial efficacy of the samples was tested against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli, as well as on two clinically resistant isolates. The samples completely inhibited the development of Staphylococcus aureus, and Pseudomonas aeruginosa was partially inhibited, while Escherichia coli was resistant to the PE action. Considering the physical and biological properties along with the environmental and economic benefits, the development of an NC/PE wound dressing seems promising.

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Section: Resultssupporting

confidence: 76%

Section: Thermogravimetric Analysis (Tga)supporting

confidence: 78%