Study On The Structure And Mass Transfer Properties Of Formulated Dietary Fiber Sol

To improve the functions of the present dietary fiber products, and simplify the complicated modification technique, Series of dietary fiber complexes compounded from soybean insoluble dietary fiber (SIDF), guar gum and pectin, were prepared with combined physiological function of SDF and IDF.The three-dimensional structures of the two kinds of SIDF complex sols (combined SIDF with guar gum or pectin) were observed by means of SEM, and mass transfer experiments (Glucose, Vc, K~+) were undertaken in an environment which simulated the digestion and absorption processes in small intestine. The mass transfer characteristics and rules were summarized, and the results were shown as follows:1. The complex sols presented a three-dimensional network made up of granules, gum and liquid states. The synergistic interaction was obviously observed in some aspects, such as viscosity and surface tension. Compared with the arithmetic sum of viscosity of three raw materials, the viscosity of formulated sol from SIDF(90%) and guar gum increased by 5.8 times, and the sol from SIDF(90%) and pectin increased by 2.7 times.2. The transfer of glucose was potently inhibited in the SIDF (90%) and guar gum sol. In the 120 minutes when the stable mass transfer process was coming, the permeation rate of glucose was only 40 percent compared with the glucose solution, while the permeation rate of Vc and K~+ had no any change.3. The sol complex had followed mass transfer rules. The first, the diffusion rate was decreased because the convection was more difficult, the viscosity was higher, the frictional resistance was increased, and there had "the boundary phenomenon". The second, the permeation rate was decreased because the increased viscosity and surface tension formed a liquid membrane in the surface of dialysis bag to enlarge the unstirred layer and the concentration polarization phenomenon. The third, the permeation quantity of small intestine membrane was decreased because the multi-branch structure of SDF conglomerations jammed the holes of small intestine membrane. The last, the permeation and diffusion rate of glucose were more deeply decreased because SDF conglomerations and IDF granules sorbed and bound the glucose to enlarge the interaction of above three diffuse resistances, while there was no any effects on the permeation rate of Vc and K~+ due to their molecular weight was so small. Due to the mass transfer rules, the sol can not only lower the content of blood sugar, but also have no any effects on the absorption of victims and minerals. So the sol is of great values in the clinical application and the health food development.