Final rept. 1 Apr 1961-31 Mar 1962
STANFORD RESEARCH INST MENLO PARK CA
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Methods of aerosol encapsulation included preencapsulation, collection, then redispersion encapsulation by condensation from a supersaturated vapor, or by condensation involving catalytic polymerization and various coagulation methods. The physical and chemical properties of the core and coat materials determine the range of applicability of each method. A useful microencapsulation method, based on coagulation by inertial force was developed. The generation apparatus, consisting of two aerosol generators in series, was utilized to produce many kinds of microcapsules. A fluid energy mill was found useful for the production of some microcapsules. The permeability of microcapsule films and the effect of exposure time and humidity were studied using dibutyl phosphite cores. Physical properties of microcapsule core and coat materials believed to be important in encapsulation were measured.
- Physical Chemistry
- Chemical, Biological and Radiological Warfare