期刊
POLYMERS & POLYMER COMPOSITES
卷 29, 期 4, 页码 259-270出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0967391120912098
关键词
Bacterial cellulose; Gluconacetobacter hansenii; industrial waste; PHB; essential oils; blends; active packaging for food
资金
- Brazilian fostering agency Fundacao de Amparo a Ciencia do Estado de Pernambuco (FACEPE [State of Pernambuco Science Assistance Foundation])
- Brazilian fostering agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES [Coordination for the Advancement of Higher Education Personnel]) [001]
- Brazilian fostering agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq [National Council for Scientific and Technological Development])
- Brazilian fostering agency Research and Development Program of the Agencia Nacional de Energia Eletrica (ANEEL [National Electrical Energy Agency])
The study aimed to produce a new material composed of a blend of bacterial cellulose and poly(3-hydroxybutyrate) with the addition of clove essential oil, which showed improved mechanical and thermal properties compared to pure PHB membrane. The new material has potential for use as an active food packaging wrap due to its attractive properties.
The aim of the present study was to produce a blend of bacterial cellulose (BC) and poly(3-hydroxybutyrate) (PHB) from the combination of pure BC membranes and 30% PHB in acetic acid. Clove essential oil (CLO) was then added as an antimicrobial agent. BC membranes were produced from Gluconacetobacter hansenii in a modified Hestrin-Schramm medium containing corn steep liquor. The scanning electron microscopic analyses revealed a visible white lining on the BC surface due to the deposition of PHB. Other analyses such as oil permeability, flexibility, and water solubility, which showed no trace of oil permeation through the films, resistance to folding (more than 100 times), and hydrophobicity, respectively, demonstrated the improvement of the material due to the blend of the polymers. When compared with the pure PHB polymer membrane, the addition of the essential oil led to a substantial reduction of 65% in microbial growth and better mechanical and thermal properties, since the traction resistance value increased by 3.9 times while the maximum degradation rate was 10 degrees C higher. The new material, composed of BC/PHB with the addition of CLO, has attractive properties for use as a biocompatible, biodegradable, active food packaging wrap.
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