Development and Characterization of Starch/Polyvinyl Alcohol Controlled Release Active Film Containing Microporous Starch Loaded with Oregano Essential Oil

The aim of our study was to produce and characterize poly-ε-caprolactone (PCL) nanospheres containing essential oils from Zanthoxylum riedelianum fruit and to evaluate their stability gains as well as their insecticidal and deterrent activities against whitefly (Bemisia tabaci). The PCL nanospheres exhibited a homogeneous spherical morphology, with particle diameters between 106.7 nm and 129.2 nm, pH of approximately 6, zeta potential (ZP) lower than −19.0 mV and encapsulation efficiency higher than 98%. Only 43% of the nanoencapsulated essential oil (NSEO) was degraded in response to ultraviolet light, whereas the essential oil (EO) degraded by 76% over the same period. In a free-choice test, the NSEO and EO reduced the number of whitefly eggs by approximately 70%. NSEO and EO at 1.5% killed 82.87% and 91.23% of 2nd-instar nymphs of whitefly, respectively. Although NSEO displayed lower insecticidal activity, it offers a greater advantage over the free EO, due to protection conferred by polymer against photodegradation. Therefore, its usage may optimize the maintenance of essential oils in the field through photoprotection and controlled release. Our results suggest that the EO of Z. riedelianum fruit can be used for B. tabaci management strategy; nevertheless, the benefits of NSEO require further evaluation at the field level.

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Synthesis and Characterization of Chitosan-Polyvinyl Alcohol Blended with Cloisite 30B for Controlled Release of the Anticancer Drug Curcumin

Journal of Biomaterials and Nanobiotechnology ◽

10.4236/jbnb.2011.24051 ◽

2011 ◽

Vol 02 (04) ◽

pp. 414-425 ◽

Cited By ~ 73

Author(s):

Umesh Kumar Parida ◽

Ashok Kumar Nayak ◽

Birendra Kumar Binhani ◽

P. L. Nayak

Keyword(s):

Controlled Release ◽

Polyvinyl Alcohol ◽

Anticancer Drug ◽

Synthesis And Characterization ◽

Cloisite 30B

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Preparation and characterization of curdlan/polyvinyl alcohol/ thyme essential oil blending film and its application to chilled meat preservation

Carbohydrate Polymers ◽

10.1016/j.carbpol.2020.116670 ◽

2020 ◽

Vol 247 ◽

pp. 116670 ◽

Cited By ~ 3

Author(s):

Yu Zhang ◽

Libang Zhou ◽

Chong Zhang ◽

Pau Loke Show ◽

Anning Du ◽

...

Keyword(s):

Essential Oil ◽

Polyvinyl Alcohol ◽

Thyme Essential Oil ◽

Meat Preservation

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Characterization of films of low density polyethylene incorporated with oregano essential oil

Research Society and Development ◽

10.33448/rsd-v9i10.8722 ◽

2020 ◽

Vol 9 (10) ◽

pp. e3849108722

Author(s):

Lara Bueno Coelho ◽

Robson Maia Geraldine ◽

Miriam Fontes Araújo Silveira ◽

Adriana Régia Marques de Souza ◽

Maria Célia Lopes Torres ◽

...

Keyword(s):

Essential Oil ◽

Barrier Properties ◽

Low Density Polyethylene ◽

Low Density ◽

Diffusion Test ◽

Screw Extruder ◽

Oregano Essential Oil ◽

Control Film ◽

Agar Diffusion Test

The purpose of this study was to develop active films of low-density polyethylene incorporated with different concentrations of oregano essential oil (1, 2, 3, 4, 5 and 6% w / w). The production of the films was carried out in a modular mono screw extruder and the antimicrobial activity was evaluated by the agar diffusion test. The films were analyzed for mechanical, optical and gaseous barrier properties to evaluate changes in the films due to the addition of an antimicrobial agent. As a result, it was found that the control film had a higher luminosity, compared to the others. The opacity was not affected. Saturation, however, had a tendency to transform more vivid colors, while the tone had a decrease tendency towards yellow. In terms of mechanical properties, elongation was not affected, Young's modulus decreased and tension increased. The CO2 permeability decreased. There were no inhibition halos around the films.

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