Microencapsulation is a technique used to “embed” a well-defined concentration of an active substance within a coating enabling less frequent re-application. By doing so, the release of the active substances can be prolonged with high efficacy rate towards crawling and flying insect pests, odours are suppressed, and the degree of toxicity reduced. Active substances which are commonly affected by exterior conditions (such as weather), are stabilised in order to optimise their biological activity and therefore avoid release during entire shelf life. Add to this the factor of biodegradability of the outer capsule and what you will end up with is an innovative and environmentally friendly alternative applicable to extermination.
The composition of the capsule
The composition of the capsule itself is formed through emulsification using a cross-linking agent that forms the microcapsule wall at the inter-phase of the oil droplets. During emulsification, a droplet size is produced and forms the inner diameter of the capsule. Within the active substance it contains an inert fluid modifying the mobility while the diffusion occurs through the pores of the capsule wall. Upon touching the porous/non-porous surfaces and drying, the active substance starts to release from the microcapsule.
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