Researchers at GW have developed new novel microencapsulation technology to encapsulate friction modifiers (FMs) (both organic and Mo-containing FMs) for automotive and diesel engines. The technology has several features: continuous additive release; triggered release; and slow continuous release + triggered release. The microcapsule size can be controlled and modified to pass through normal engine filters. Besides, FMs, the technology allows inclusion of other additives (antioxidants, and other selected enhancers to prolong the effectiveness of the FMs. The microencapsulated FMs have been validated by multiple engine chassis dynamometer tests running EPA fuel economy driving cycles.
The microcapsule shell wall thickness can be controlled to impart various mechanical strengths and porosity. Up to 5 additives have been encapsulated in a single capsule, providing the flexibility and tailored friction reduction performance. The surface charge can be changed and adapted to various applications, including industrial lubrication applications. The developed solution also provides time-controlled release of additives. The solution is typically used in and as friction modifiers in all fluidic aspects associated with an engine or the like, but some aspects of the microencapsulation technology may find applications in food technology, cosmetics, pesticide control, drug delivery, etc.
Fig. 1 – One example of an aspect of the invention
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