Abstract: This experiment mainly studied the effects of composite emulsifying stabilizers on the glomeration of dietary fiber with instantaneous high pressure(IHP) treatment. The glomeration of dietary fiber varied with the changes of the work pressure and number of times of the IHP. The results indicated that the glomeration was most conspicuous under the pressure of 140 MPa. The average granularity of the materials would increase to 1447.4 nm from 1134.7 nm after being treated one time under the pressure of 140 MPa, and increase to 1915.0 nm after being treated two times, and even increase to 2426.5 nm after being treated three times. We chose better emulsifying stabilizers comparatively to mix together and make orthogonal tests, and judged the effects of composite emulsifying stabilizers on the glomeration of dietary fiber from the changes of the granularity distribution and Zeta potential of the dietary fiber aqueous solution after being added with composite emulsifying stabilizers. From the experiment results, a better formula of adding composite stabilizers are as follows: 0.04% GMS, 0.06% S.A.I.B-15, 0.23% CMC-Na, 0.05% xanthan gum and 0.02% carrageenan so as to reduce the glomeration of dietary fiber. It could make the average granularity of the materials reduce to 202.4±58.5 nm under the pressure of 140MPa after being treated three times.

Key words: dietary fiber, instantaneous high pressure, glomeration, emulsifier, granularity distribution, Zeta potential