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Título: Effect of exposure to a light‑emitting diode (LED) on the physicochemical characteristics of natural latex biomembranes used to treat diabetic ulcers
Autor(es): Santana, Thamis Fernandes
Oliveira, Rebeca Hannah de Melo
Santos, Ludmila Evangelista dos
Lima, Eunice Paloma Nascimento
Faria, Sylvia de Sousa
Fonseca, Marcos Augusto Moutinho
Silva, Jaqueline Rodrigues da
Tatmatsu‑Rocha, José Carlos
Gomes, Marília Miranda Forte
Rosa, Mário Fabrício Fleury
Rosa, Suélia de Siqueira Rodrigues Fleury
Carneiro, Marcella Lemos Brettas
E-mail do autor: mailto:marbretas@unb.br
ORCID: https://orcid.org/0000-0003-1516-9426
https://orcid.org/0000-0003-2992-5747
https://orcid.org/0000-0002-9125-0018
https://orcid.org/0000-0001-6552-7143
https://orcid.org/0000-0001-9113-9005
https://orcid.org/0000-0002-6017-7057
https://orcid.org/0000-0003-4900-4857
https://orcid.org/0000-0001-8584-9676
https://orcid.org/0000-0002-4821-9007
https://orcid.org/0000-0002-1247-9050
https://orcid.org/0000-0002-6165-0969
Assunto: Borracha natural
Fototerapia
Materiais biocompatíveis
Cicatrização de feridas
Data de publicação: 14-Jun-2022
Editora: Springer
Referência: SANTANA, Thamis Fernandes et. al. Effect of exposure to a light‑emitting diode (LED) on the physicochemical characteristics of natural latex biomembranes used to treat diabetic ulcers. Research on Biomedical Engineering, n. 38, p. 901–911, 2022. DOI 10.1007/s42600-022-00226-y. Disponível em: https://link.springer.com/article/10.1007/s42600-022-00226-y. Acesso em: 11 nov. 2022.
Abstract: Purpose Natural latex biomembrane has shown high therapeutic potential for the treatment of diabetic ulcers when associated with phototherapy. In this study, physical and chemical alterations in the latex biomembranes were evaluated after exposure to light-emitting diode (LED) irradiation and after contact with NaCl solution. Methods There were three experimental groups: natural latex biomembranes (1) in natura; (2) after 35 min of LED light irradiation; and (3) after immersion in NaCl 0.9 g% solution. The samples were analyzed by tensile strength test, thermogravimetry, contact angle wettability, and Fourier-transform infrared spectroscopy. Results The biomembranes that were submitted to contact with NaCl aqueous solution or exposure to LED did not undergo impairment of mechanical resistance. The thermogravimetry analysis indicated that increasing temperature led to mass loss in all samples, referring to their decomposition temperatures. In the wettability test, biomembranes exposed to LED showed a signifcant reduction in the contact angle between 0 and 10 min, indicating an increase in hydrophilicity, suggesting water storage capacity. The Fourier-transform infrared spectrometry assay showed that there was a more signifcant reduction in vibration intensity after immersion in NaCl solution compared to untreated biomembranes. An increase in the intensity of the entire spectrum of biomembranes exposed to LED was observed in comparison with the other samples, which may be related to photodegradation caused by LED light irradiation. Conclusion The biomembranes underwent signifcant changes in its chemical structure after being subjected to diferent types of exposure and maintained its elasticity and tensile strength properties, in addition to showing good water retention capacity after exposure to LED. Thus, it maintains many of its properties for application as a tissue-regenerating biomaterial, even when subjected to LED irradiation and a humid environment.
DOI: https://doi.org/10.1007/s42600-022-00226-y
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