Preparo e caracterização físico-química e biológica de um biocompósito à base de celulose associada à própolis

Picchi, Juliano Bottura

doi:10.11606/d.82.2010.tde-20072012-090651

Cited by 2 publications

(3 citation statements)

References 62 publications

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“…The adsorption of the extract on the membrane has created a kind of film on its surface, filling the pores and covering the BC nanofibers. This behavior was also observed by PICCHI [33] in his studies involving the incorporation of propolis into the BC membrane.…”

Section: Scanning Electron Microscopy (Sem)supporting

confidence: 74%

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Development and characterization of bacterial cellulose membrane incorporated with Witch hazel extract

et al. 2023

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Bacterial cellulose (BC) has stood out in the biomedical field for its biocompatibility, non-toxicity and high liquid absorption capacity. Thus, studies have been conducted aiming at the functionalization of BC with substances that add properties, such as anti-inflammatory and antimicrobial action. Hamamelis virginiana plant extract is known for its astringent, anti-inflammatory and antimicrobial properties. Thus, the present work aimed to incorporate aqueous (AE) and glycolic (GE) extracts of witch hazel in different concentrations to BC, aiming at its application as a curative. BC membranes incorporated with the extracts were characterized by thermogravimetric analysis (TGA), Fourier transforms infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and antimicrobial activity. The TGA results indicated a reduction in thermal stability and the appearance of a new stage of degradation in the samples that underwent incorporation. Furthermore, the FTIR showed the presence of aromatic compounds not found in the BC, corroborating the TGA. The micrographs revealed that the incorporation of the extracts resulted in the formation of a film on the surface of the membranes, covering the nanofibers. These results show that incorporating the aqueous and glycol extracts in the BC membrane was successful. However, despite the crude extracts' antimicrobial potential, antimicrobial activity in the functionalized BC samples was not observed.

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Section: Scanning Electron Microscopy (Sem)supporting

confidence: 74%

“…Furthermore, the bands close to 3300 cm -1 , 2900 cm -1 and 1000 cm -1 showed greater intensity with the addition of the aqueous extract. According to PICCHI [33] the band's broadening at 3300 cm -1 , referring to the C-OH bond, may be related to forming a hydrogen bond between witch hazel and cellulose.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

Development and characterization of bacterial cellulose membrane incorporated with Witch hazel extract

et al. 2023

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“…The determination of the maximum concentrations of each component was performed from preliminary tests, where the formation of flexible, easy-to-handle, and homogeneous structures (films) was evaluated. In addition, the values were based on works published in the literature, such as the study by Picchi [56], which demonstrated that BC membranes with at least 2.0 g of dry mass of propolis presented a satisfactory antimicrobial activity for application as a wound dressing. The values of the standards were established according to the study of Machado et al [57] for the green propolis sample, where the value found for p-coumaric acid was approximately 8.0 mg, the same value found for biochanin A in the red propolis samples.…”

Section: Preparation Of the Wound Dressingsmentioning

confidence: 99%

Active Potential of Bacterial Cellulose-Based Wound Dressing: Analysis of Its Potential for Dermal Lesion Treatment

et al. 2022

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The use of innate products for the fast and efficient promotion of healing process has been one of the biomedical sector’s main bets for lesion treatment modernization process. The aim of this study was to develop and characterize bacterial cellulose-based (BC) wound dressings incorporated with green and red propolis extract (2 to 4%) and the active compounds p-coumaric acid and biochanin A (8 to 16 mg). The characterization of the nine developed samples (one control and eight active wound dressings) evidenced that the mechanics, physics, morphological, and barrier properties depended not only on the type of active principle incorporated onto the cellulosic matrix, but also on its concentration. Of note were the results found for transparency (28.59–110.62T600 mm−1), thickness (0.023–0.046 mm), swelling index (48.93–405.55%), water vapor permeability rate (7.86–38.11 g m2 day−1), elongation (99.13–262.39%), and antioxidant capacity (21.23–86.76 μg mL−1). The wound dressing based on BC and red propolis was the only one that presented antimicrobial activity. The permeation and retention test revealed that the wound dressing containing propolis extract presented the most corneal stratum when compared with viable skin. Overall, the developed wound dressing showed potential to be used for treatment against different types of dermal lesions, according to its determined proprieties.

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Preparo e caracterização físico-química e biológica de um biocompósito à base de celulose associada à própolis

Cited by 2 publications

References 62 publications

Development and characterization of bacterial cellulose membrane incorporated with Witch hazel extract

Development and characterization of bacterial cellulose membrane incorporated with Witch hazel extract

Active Potential of Bacterial Cellulose-Based Wound Dressing: Analysis of Its Potential for Dermal Lesion Treatment

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