Controlled Release of Linalool Using Nanofibrous. Membranes of Poly(lactic acid) Obtained by Electrospinning and Solution Blow Spinning: A Comparative Study

Autor(es)

Souza, Michelle A. ^[1] ; Oliveira, Juliano E. ^[2] ; Medeiros, Eliton S. ^[2] ; Glenn, Gregory M. ^[3] ; Mattoso, Luiz H. C. ^[1]

Afiliação do(s) autor(es)

^[1] Embrapa Instrumentacao CNPDIA, LNNA, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Paraiba UFPB, Dept Engn Mat DEMAT, BR-58051900 Joao Pessoa, Paraiba - Brazil

^[3] ARS, Bioprod Chem & Engn, Western Reg Res Ctr, USDA, Albany, CA 94710 - USA

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 15, n. 8, p. 5628-5636, AUG 2015.
• Citações Web of Science: 14

Resumo

The controlled-release of natural plant oils such as linalool is of interest in therapeutics, cosmetics, and antimicrobial and larvicidal products. The present study reports the release characteristics of linalool encapsulated at three concentrations (10, 15 and 20 wt.%) in poly(lactic acid) nanofibrous membranes produced by electrospinning and solution blow spinning (SBS) as well as the effect of linalool on fiber morphology and structural properties. PLA nanofibrous membranes were characterized by Scanning Electron Microscopy (SEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and contact angle measurements. The average diameters of the electrospun and solution blow spun nanofibers were similar, ranging from 176 to 240 nm. Linalool behaved as a plasticizer to PLA decreasing the glass transition temperature (T-g), melting point (T-m) and crystallization temperature (T-c) of PLA. Curves of the release of linalool at 35 degrees C were non-linear, showing a clear biphasic pattern consistent with one or more Fickian release components. The time required to release 50% of linalool (t(1/2)) decreased with increasing linalool concentration. The range in t(1/2) values for SBS nanofibers was higher (291-1645s) than the t(1/2) values for electrospun fibers (76-575s). (AU)

• Processo FAPESP: 10/19860-1 - Desenvolvimento de membranas biopoliméricas nanoestruturadas para liberação controlada de hormônios e semioquímicos
• Beneficiário: Juliano Elvis de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado