Nanoencapsulation for Perfumes, Scents and Flavours

Published by: Technology Transfer Centre Ltd.

Published: Apr. 1, 2006 - 30 Pages

Table of Contents

1 INTRODUCTION

2 TECHNOLOGY PROVIDERS

2.1 UNIVERSITIES

2.1.1 University 1 United Kingdom: Use of micro reactors for perfume formulation at the point of need; Volatiles produced when required to give fresh fragrances; Personalized fragrances through custom formulation.

2.1.2 University 2 UK: Synthesis and supramolecular chemistry of novel macrocycles and molecular capsules 6

2.1.3 University 3 UK: Protein hosts that bind various types of molecular species such as odour compounds, coloured molecules, etc

2.1.4 University 4 UK: Binding odour compounds by nanoscale design and synthesis of smart imprinted polymers

2.1.5 University 5 UK: Polymer encapsulation of photochromic dyes

2.1.6 University 6 UK: Stimulus responsive block copolymer micelles that can allow triggered release of actives from multilayer particle coatings

2.1.7 University 7 UK: Hydrocolliod technologies for perfume and pheromone end uses

2.1.8 University 1 Israel: Sonochemical method for encapsulating materials in microspherical protein molecules

2.1.9 University 1 Belgium: Liposomes, micelles and magnetic nanoparticles

2.1.10 University 2 Belgium: Nanoparticles in Cosmetics

2.1.11 University 3 Belgium: Perfume diffusion control

2.1.12 University 1 Australia: New micro spraying systems for drug delivery which can be easily modified for perfume

2.2 COMPANIES

2.2.1 Company 1 United Kingdom: Encapsulation of delicate drugs into biodegradable polymers; Microparticles of polymer that encapsulate a molecule of choice (currently down to 5micron diameter, with plans to reduce particle size in the future)

2.2.2 Company 2 UK: Combinations of cross-linked carbohydrates to encapsulate active molecules

2.2.3 Company 3 UK: Smart materials for encapsulation that allow triggered product release in response to specific environmental conditions, such as temperature, acidity, water activity, light or exposure to certain chemical triggers. For example, perfume encapsulates might be programmed to release fragrance upon exposure to sunlight or hot weather

2.2.4 Company 4 UK: Hollow nano silica shells (approx 500nm). These can be filled with other organic or inorganic compounds which can be discharged in a slow release mechanism through the permeable shells

2.2.5 Company 5 UK: Encapsulate high concentrations of perfume in yeast cell walls and can control the delivery of perfumes for long lasting and novel perfume effects

2.2.6 Company 6 UK: Lyocell which is cellulose based fibre, made by an advanced environmentally friendly manufacturing system

2.2.7 Company 1 Germany: Perform encapsulation in nanocapsule (below 100 nm diameter) of different oily and water-soluble substances, including drugs

2.2.8 Company 2 Germany: Encapsulation (and also anchoring/immobilization) of dye molecules, pharmaceuticals, enzymes, and complex metallo-organic molecules (homogeneous catalysts)

2.2.9 Company 3 Germany: Characterization of dynamic colloidal structures such as micelles and liposomes that are commonly used for encapsulation

2.2.10 Company 4 Germany: Encapsulating organic an inorganic molecules and particles based on LBL-technology (layer by layer)

2.2.11 Company 5 Germany: Proprietary technology to form uniform droplet from preferably viscous fluids. Depending on the fluids nature, solidification leads to particles, e.g. by gelation, immediate cooling or ionic action in a suitable curing solution; lens-shaped hydrogels based on poly-vinylalcohol (PVA). They were developed as a powerful alternative to the widely spread encapsulation of biocatalyst into biopolymer-based hydrogels, e.g. on basis of calcium alginate, that often bears disadvantages regarding biological or mechanical stability

2.2.12 Company 6 Germany: Very efficient methods to produce nanocapsules using a layer by layer approach on a number of different templates, e.g. liposomes, emulsions and the like

2.2.13 Company 1 The Netherlands: Micro system technology to manufacture membranes (microsieves) with very well defined pore size. These membranes are very thin for a maximum product flux and can be tailored to the needs of the application (porosity, shape, pore size, material, specific coatings etc.)

2.2.14 Company 1 United States: Nano and micro emulsions and encapsulations for pharmaceutical, cosmetic, nutriceutical, and other personal care markets; Synthesis of nanostructured mixed metal oxides for catalytic and electronic applications; and, Fine dispersions of inorganic and organic materials for washcoats, inks, and coatings for various markets

2.2.15 Company 2 United States: Proprietary particle engineering techniques for applications, including nanoparticulate controlled release systems, processing of high potency and high purity materials.

2.2.16 Company 3 United States: Nano-device platform (porous nanoparticle) made from a novel material (proprietary) that can be deployed for various encapsulation applications

2.2.17 Company 1 France: Intelligent polymers that possess a molecular memory thanks to an imprinting process at the molecular level. This memory enables the polymer to repeatedly recognise and bind a target compound with a very high selectivity.

2.2.18 Company 2 France: Microcapsules of perfumes, aromas and odours; Microcapsules of active agents, vitamins, pigments and essential oils.

2.2.19 Company 3 France: Microencapsulation, granulation, microgranulation and coating of various active molecules; Encapsulation of liquids and solids in microcapsules and microgranules by physicochemical processes (coacervation, polymerisation, polycondensation, etc…); Encapsulation by hot-melt processes, making of microspheres by spray-cooling and prilling;Encapsulation in gelified polymers (alginates); Fluid-bed coating with water-soluble polymers, latex suspensions, melted fats and waxes (hot-melt process); Production of microcapsules and microgranules for veterinary use, cosmetics or technical purpose (Tobacco, washing powders, sponges, pet litter, etc….).

2.2.20 Company 4 France: The technology is used to create, from naturally originating molecules, a partition or matrix which isolates, stabilises and protects active compounds

2.3 RESEARCH CENTRES

2.3.1 Research Centre 1: Development of micro - and nano encapsulation technology

2.3.2 Research Centre 1 Norway: Nanoencapsulation

2.3.3 Research Centre 1 Spain: Coating small particles of solids or droplets of liquids with films of polymeric or fatty materials obtaining free flow particles with microns size

2.3.4 Research Centre 1 Greece: Nano spheres to encapsulate chemical (e.g. inhibitors)

Abstract

A main area of investigation in the last decade has been the exploitation of encapsulation technologies applied to consumer products. Particularly when applied to flavour and fragrances, they have enhanced their functionality and performance in application enabling longer shelf life stability, protection from harsh processing environments and ultimately achieving the desired performance at the consumer’s end, i.e. the moment of consumption. This report reviews current trends and techniques in the area of flavour and fragrance delivery systems, in the light of their applications and performances, particularly focusing on the impact at micro and nano scale.

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