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Bottles with nanomaterials for in-bottle sterilisation

Identification

Key words nanomaterials, bottle, sterilization, package
Latest version 2012/04/02
Completed by FRIP

How does it work?

Primary objective To produce bottles with inner surface enriched by nanoparticles which inactivate microorganisms entering bottles with air before filling or with liquids filled into bottles.
Working principle Bottles equipped with nanoparticles (NP) can deactivate microorganisms through contact between the NPs and the microorganisms. NP penetrates the microbial body (cell) and deactivates it. NP may be composed by those chemicals that have antimicrobial activity. There are some examples how the NP can be produced:

Multi-functional components of organic modified NPs can be synthesized by using supercritical water [1]. The hybrid NPs show high affinity for the organic solvent and the polymer matrix, which leads to the fabrication of these super hybrid NPs. Transparent dispersion of high refractive index NPs, such as TiO2 and ZrO2, in the polymers is required to fabricate optical materials.

Polylactic acid (PLA) polymers can be combined with nanotechnology [2], which makes it possible to produce biodegradable versions of petrochemical-based polymers. By using PLAs a compostable, biodegradable thermoplastic can be produced from renewable resources The PLA polymers can be strong, active packaging materials for different applications requiring antimicrobial and antioxidant characteristics. Connecting NPs to PLA polymers is easy due to adhesivity of NP on this type of polymers.

Amphiphilic N-phthaloylchitosan-g-polycaprolactone (PHCS-g-PCL) molecular bottle brushes can be prepared by "graft onto" method [3]. The narrow distribution of polycaprolactone side chains ensures that the molecular bottle brushes can self-assemble into particles with a narrow size distribution in aqueous solution.

Images
Additional effects NP positional distribution in polymeric materials can cause the non-uniform antimicrobial effect on microbes distributed in liquid packed food. Therefore this distribution has to be as much as possible uniform on the inner surface of the bottles.
Important process parameters conduction of heat generated by reaction of NPs with target microorganisms, thawing of polymers, release of NP into packed products.
Important product parameters Product:

There are important properties of the nanoparticles:

  • mass transfer into liquid,
  • biodegradation of polymeric materials of bottles that causes the release of NP.

Packaging properties

  • Size of the (self-assembled) polymeric particles, surface properties, porosity
  • PLA properties and modifications via different methods, like using modifiers, blending, copolymerizing, and physical treatments.

What can it be used for?

Products Plastic bottles equipped with nanoparticles on inner surface, bottles with active layer.
Operations Packaging
Solutions for short comings Using of these new bottles can limit using pre-pasteurization or pre-sterilization of drinks.

What can it NOT be used for?

Products Highly solvent food (e.g. drinks with high acids content, fruit juices or juices with high level of acids) that breaks connections between polymeric plastic material and NPs – enhances the mass transfer of NPs into food and can react with polymeric materials and release the NPs from their positions.
Operations Intensive stream during filling of bottles that can release the NPs into the food fluid.
Other limitations Leakage of NPs into liquid foods. Stability of the NPs during storage.
Risks or hazards Mass transfer of nanoparticles into the food contained in bottles. Consumer consumption of NPs released into the packed products, which has unknown effects on human health.

Implementation

Maturity Research results are known, real systems are in preparation.
Modularity /Implementation These bottles can be used in classical filling lines without pre-pasteurization or pre-sterilization parts of the line.
Consumer aspects Consumption risk of NPs. No regulations and labeling requirements are requested for NP materials, and consequently the consumers can not make an informed choice at the present. Consumers do not welcome the consumption of NP.
Legal aspects Food contact materials, Regulation (EC) 1935/2004
Environmental aspects Effect of release of NPs into the environment is unknown yet. The linkage of a 100% bio-originated material and nanomaterials opens new windows for becoming independent, primarily, of petrochemical-based polymers and, secondarily, for answering environmental and health concerns. The use of these materials will undoubtedly grow over time. The unknown causes can do the release of nanoparticles into environment.

Further Information

Institutes INPL, Texas A&M University
Companies
References [1] Adschiri, T., Takami, S., Minami, K., Yamagata, T., Miyata, K., Morishita, T., Ueda, M., Fukushima, K., Ueno, M., Okada, T., Oshima, H., Mitani, Y., Asahina, S., Unno, S.,, Super hybrid materials, (2012) Materials Science Forum, 700, pp. 145-149.

[2] Jamshidian, M., Tehrany, E.A., Imran, M., Jacquot, M., Desobry, S., Poly-Lactic Acid: Production, applications, nanocomposites, and release studies, (2010) Comprehensive Reviews in Food Science and Food Safety, 9 (5), pp. 552-571.

[3] Huang, Y., Li, L., Fang, Y., Preparation of size-tunable, highly monodisperse particles by self-assembly of N-phthaloylchitosan-g-polycaprolactone molecular bottle brushes, (2009) Materials Letters, 63 (16), pp. 1416-1418.

conduction of heat generated by reaction of NPs with target microorganisms, thawing of polymers, release of NP into packed products. Product: There are important properties of the nanoparticles:

  • mass transfer into liquid,
  • biodegradation of polymeric materials of bottles that causes the release of NP.

Packaging properties

  • Size of the (self-assembled) polymeric particles, surface properties, porosity
  • PLA properties and modifications via different methods, like using modifiers, blending, copolymerizing, and physical treatments.warning.png"Product:

There are important properties of the nanoparticles:

  • mass transfer into liquid,
  • biodegradation of polymeric materials of bottles that causes the release of NP.

Packaging properties

  • Size of the (self-assembled) polymeric particles, surface properties, porosity
  • PLA properties and modifications via different methods, like using modifiers, blending, copolymerizing, and physical treatments." cannot be used as a page name in this wiki.

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Created by Milan123 on 5 April 2012, at 12:38