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Growth of probiotic Lactobacillus rhamnosus GR-1 using saccharified oil palmmesocarp fibre as affected by saccharification time and fermentation time

Abstract:
Este trabajo presentó el desarrollo y la caracterización mecánica de biocompuestos elaborados a partir de cascarilla de cacao. La investigación buscó valorizar residuos agroindustriales y formular una alternativa biodegradable a los plásticos convencionales. Se empleó un diseño experimental factorial 2×2, considerando dos niveles de tamaño de partícula del refuerzo (1000 µm y 1700 µm) y dos proporciones de contenido de cascarilla de cacao (20 % y 30 %). Se prepararon 89 probetas distribuidas en cuatro formulaciones, las cuales fueron sometidas a ensayos de tracción uniaxial según la norma ASTM D638-14 para evaluar el módulo de elasticidad, resistencia a la tracción y elongación a la rotura. Los resultados evidenciaron que la formulación T1700_R20 (1700 µm, 20 % de refuerzo) presentó el mejor desempeño mecánico en términos de rigidez (118,39 MPa) y resistencia (0,74 MPa), mientras que T1000_R20 (1000 µm, 20 %) mostró mayor ductilidad (4,90 %). Se concluyó que el tamaño de partícula y el porcentaje de refuerzo afectaron significativamente las propiedades del biocompuesto, siendo crucial encontrar un balance entre rigidez y deformabilidad. El estudio cumplió sus objetivos, al proponer una formulación basada en materiales naturales y evaluar sus propiedades mecánicas. Finalmente, se recomienda realizar un estudio detallado de la microestructura para comprender con mayor profundidad el comportamiento del material y establecer correlaciones claras entre su morfología interna y sus propiedades mecánicas.This study presented the development and mechanical characterization of biocomposites made from cocoa husk. The research aimed to valorize agro-industrial waste and formulate a biodegradable alternative to conventional plastics. A 2×2 factorial experimental design was employed, considering two levels of reinforcement particle size (1000 µm and 1700 µm) and two proportions of cocoa husk content (20% and 30%). A total of 89 specimens were prepared and distributed into four formulations, which were subjected to uniaxial tensile tests according to ASTM D638-14 to evaluate the elastic modulus, tensile strength, and elongation at break. The results showed that the T1700_R20 formulation (1700 µm, 20% reinforcement) exhibited the best mechanical performance in terms of stiffness (118.39 MPa) and strength (0.74 MPa), while T1000_R20 (1000 µm, 20%) demonstrated greater ductility (4.90%). It was concluded that both particle size and reinforcement content significantly affected the properties of the biocomposite, making it essential to find a balance between stiffness and deformability. The study achieved its objectives by proposing a functional formulation based on natural materials and evaluating its mechanical properties. Finally, a detailed microstructural study is recommended to gain deeper insight into the material’s behavior and establish clear correlations between its internal morphology and mechanical properties
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.26656/fr.2017.6(1).723
Publication website:
https://bibdigital.epn.edu.ec/bitstream/15000/26772/1/CD%2015378.pdf

Authors

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Role:
Author
ORCID:
0000-0001-6119-6025
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Role:
Author
ORCID:
0000-0002-3884-3359
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Institution:
University of Oxford
Role:
Author
ORCID:
0000-0001-7344-2932
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Role:
Author
ORCID:
0000-0002-1487-9787


Publisher:
Rynnye Lyan Resources
Journal:
Journal of Food Science More from this journal
Volume:
6
Issue:
1
Pages:
132-138
Publication date:
2022-01-26
DOI:
ISSN:
2550-2166


Language:
Spanish
Keywords:
Pubs id:
1250295
Local pid:
pubs:1250295
Source identifiers:
W4210668494
Deposit date:
2026-04-10
ARK identifier:
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