PLA/modified-starch blends and their application for the fabrication of non-woven fabrics by melt-blowing.

Autor: Ávila-Orta CA; Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo, Coahuila C. P 25294, Mexico., Covarrubias-Gordillo CA; Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo, Coahuila C. P 25294, Mexico., Fonseca-Florido HA; Investigador por México, CONACYT, Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo, Coahuila C.P 25294, Mexico. Electronic address: heidi.fonseca@ciqa.edu.mx., Melo-López L; Investigador por México, CONACYT, Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo, Coahuila C.P 25294, Mexico., Radillo-Ruíz R; Consultoría e Ingeniería en Servicios Especializados (CISE), Leona Vicario 1686, Ciudad de México C.P 09500, Mexico., Gutiérrez-Montiel E; Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo, Coahuila C. P 25294, Mexico.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2023 Sep 15; Vol. 316, pp. 120975. Date of Electronic Publication: 2023 May 05.
DOI: 10.1016/j.carbpol.2023.120975
Abstrakt: Blends of polylactic acid (PLA) and thermoplastic starch (TS) with and without chemical modification were obtained by melt extrusion and used to obtain non-woven fabrics by melt-blowing for the first time. Different TS were obtained by reactive extrusion from native cassava, oxidized, maleated, and dual modified (oxidized and maleated) starch. The chemical modification of starch decreases the difference in viscosity and favors blending, resulting in more homogeneous morphologies, unlike the blends with unmodified TS, which displayed a visible phase separation with large TS droplets. The dual modified starch showed a synergistic effect to process TS by melt-blowing. Regarding non-woven fabrics, values in diameter (2.5-82.1 μm), thickness (0.4-0.6 mm), and grammage (49.9-103.8 g/m 2 ) were explained due to differences in viscosity of the components, and to the fact that during melt the hot air preferentially stretches and thins the areas without large droplets of TS. Moreover, plasticized starch acts as a flow modifier. The porosity of the fibers increased with the addition of TS. Further studies and optimization of blends with low contents of TS and type starch modification will be necessary to completely understand these systems with very complex behavior to obtain non-woven fabrics with improved properties and application.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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