EFFECT OF MOISTURE CONTENT AND PARTICLE SIZE ON THE POWDER FLOWABILITY OF PRE-GELATINIZAED STARCH
The native starch from maize corn,tapioca and several other sources is an excellent raw material for value added products.One such product which is in great demand is pre-gelatinized starch,which finds several applications in food and pharmaceutical industries.It is also used in petroleum industries for tertiary oil recovery.Several other applications are also due to its adhesive properties.Pre-gel starch can be manufactured by either drum drying or extrusion technology.It is then milled to obtain the desired particle size.The residual moisture content,particle size and its distribution are some of the key parameters determining its scope of application.In the present study,the flow properties were measured using Brookfield’s Powder Flow Tester (PFT).Various grades of pre-gel starches has a profound effect on the flow function that were measured in terms of unconfined yield strength (UCS) and major principle consolidation stresses (MCS).The derived quantities from the flow function include effective angle of internal friction (δj),effective angle of wall friction (ф) and cohesion of the powder (C).These derived parameters along with the Carr Index (CI) or Hausner ratio (HR) are useful in the design of powder handling equipments.
Modified starches Mohr’s circles Flow function Yield locus (YL)
S.R.Chavan A.S.Shinde B.N.Thorat
Advanced Drying Laboratory,Department of Chemical Engineering,Institute of Chemical Technology(Formerly UDCT),N.P.Road,Matunga(E),Mumbai 400019,India
国际会议
The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))
厦门
英文
1-7
2012-01-11（万方平台首次上网日期，不代表论文的发表时间）