Evaluation of surfactant activity and emulsifying of Pea protein isolate (Pisum sativum L.) obtained by the spray dryer

Résumé

This study evaluates the biosurfactant activity and emulsification ability of pea proteins isolated (Pisum sativum
L.). The results showed that aqueous solutions containing the pea proteins isolated (PPI) reduce the
water surface tension to 47mN/m, approximately. The use of spray dryer does not change the surfactant activity
of the PPI because surface tension and CMC will not change. The PPI is thermally stable and can be
used in processes that require temperatures between 4°C and 80°C, as industrial processes such as baking, ice
cream and other formulation. The protein isolate and pea assessed emulsions with toluene and n-heptane
were stable. Emulsions castor and linseed oil were not stable under the conditions reported in this paper.
Therefore, despite the pea protein isolate is a surfactant it cannot be used in any industrial process. Both the
food industry and in the biotechnology industry should evaluate the conditions for application of protein isolates
from pea.
Keywords: biosurfactant; vegetable protein; globulin; spray dryer; pea protein isolated.