Mechanical properties of potato starch modified by moisture content and addition of lubricant

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Laboratory testing was conducted to deliver a set of characteristics of structure and mechanical properties of pure starch and starch with an addition of a lubricant - magnesium stearate. Considerable influence of moisture content of potato starch was found in the case of density, parameters of internal friction, coefficients of wall friction and flowability. Elasticity was found to be strongly influenced by water content of the material. Addition of magnesium stearate affected density and parameters of flowability, internal friction and elasticity. Bulk density increased from 604 to 774 kg m-3 with decrease in moisture content of potato starch from 17 to for 6%. Addition of magnesium stearate resulted in approximately 10% decrease in bulk density. Angle of internal friction obtained for 10 kPa of consolidation stress decreased from 33 to 24º with increase in moisture content, and to approximately 22º with addition of the lubricant. With an increase of moisture content from 6 to 18% and with addition of the lubricant, the modulus of elasticity during loading decreased from approximately 1.0 to 0.1 MPa. Modulus of elasticity during unloading was found in the range from 19 to 42 MPa and increased with increase of moisture content and amount of lubricant.

Abdo J., Tahat M., Abouelsoud A., and Danish M., 2010. The effect of frequency of vibration and humidity on the stick - slip amplitude. Int. J. Mechanics Materials in Design, 6, 645-651.

Ahmad M.Z., Akhter S., Anvar M., Rahman M., Siddiqui M.A., and Ahmad F.J., 2012. Compactibility and compressibility studies of Assam Bora rice starch. Powder Technol., 224, 281-286.

Bagga P., Brisson G., Baldwin A., and Davies C.E., 2012. Stickslip behaviour of dairy powders: Temperature effect.Powder Technol., 223, 46-51.

Baldwin P.M., Adler J., Davies M.C, and Melia C.D., 1998. High resolution imaging of starch granule surfaces by atomic force microscopy. J. Cereal Sci., 27, 255-265.

Barletta D. and Poletto M., 2013. A device for the measurement of the horizontal to vertical stress ratio I powders. Granular Matter, 15(4), 487-497.

Bieganowski A., Krusińska A., and Ryżak M., 2011. A method for the elimination of measurement error in light microscopy examinations of the geometry of starch granules. Int. Agrophys., 25, 193-196.

Bos C.E., Bolhuis G.K., van Doorne H., and Lerk C.F., 1987. Native starch in tablet formulations: properties on compaction. Pharma ceutisch Weekblad scientific Edition, 9, 274-282.

Carr R.L., 1965. Evaluating flow properties of solids. Chemical Eng., 72, 163-168.

Chujiang C., Jinzhi L., Zhigang S., Shulin M., and Yushan X., 2009. Synthesis of hydrophobic corn starch with high flowability by surface modification. Starch/Starke, 61, 344-351.

Crouter A. and Briens L., 2014. The effect of moisture on the flowability of pharmaceutical excipients. AAPS Pharmaceutical Sci. Technol., 15 (1), 65-74.

Cuq B., Rondet E., and Abecassis J., 2011. Food powder engineering, between knowhow and science: Constraints, stakes and opportunities. Powder Technol., 208(2), 244-251.

Di Qu A. and Wang S.S., 1998. Modelling shearing resistance of powdery starch for simulation Studies of extrusion cooking processes. Starch/ Starke, 50/1, 147-153.

Eurocode 1, Part 4, 2006. Basis of design and actions on structures. Actions in silos and tanks. EN 1991-4.

Fitzpatrick J.J. and Ahrne L., 2005. Food powder handling and processing: industry problems, knowledge barriers and research opportunities. Chemical Eng. Proc., 44, 209-214.

Guan W. and Zhang Q., 2009. The effect of moisture content and compaction on the strength and arch formation of wheat flour in model bin. J. Food Eng., 94, 227-232.

Kamika Operation Guide, 2009. Kamika Instruments, Warsaw, Poland.

Mazurkiewicz J., 2011. Fractal dimension and rheological properties of cereal starches. Int. Agrophys., 25, 249-255.

Mitrus M. and Mościcki L., 2009. Physical properties of thermoplastic starches. Int. Agrophys., 23, 305-308.

Molenda M., Stasiak M., Horabik J., Fornal J., Błaszczak W., and Ornowski A., 2006. Microstructure and mechanical parameters of five types of starch. Polish J. Food Nutrition Sci., 5/56(2), 161-168.

Mościcki L., Mitrus M., Wójtowicz A., Oniszczuk T., Rejak A., and Janssen L., 2012. Application of extrusion-cooking for processing of thermoplastic starch (TPS). Food Res. Int., 47, 291-299.

Moya M., Aguado P.J., and Ayuga F., 2013. Mechanical properties of some granular agricultural materials used in silo design. Int. Agrophys., 27, 181-193.

Nokhodchi A., 2005. An overview of the effect of moisture on compaction and compression. Pharmaceutical Technol., 1, 46-66.

Odeku O.A., Awe O.O., Popoola B., Odeniyi M.A., and Itiola O.A., 2005. Compression and mechanical properties of tablet formulations containing corn, sweet potato and cocoyam starches as binders. Pharmaceutical Technol., 4, 82-90.

Opaliński I., Chutkowski M., and Stasiak M., 2012. Characterizing most food-powder flowability using Jenike sheartester. J. Food Eng., 108, 51-58.

Ramírez A., Moya M., and Ayuga F., 2009. Determination of the mechanical properties of powdered agricultural products and sugar. Part. Part. Sys. Charact., 26(4), 220-230.

Ruppel J., Muller A.K., Althaus G., Drexel C.P., and Zimmermann I., 2009. The modified outflow funnel - A device to assess the flow characteristics of powders. Powder Technol., 193, 87-92.

Salerno M., Żukowska A., Thorat S., Rufilli R., Stasiak M., and Molenda M., 2014. High resolution imaging of native wheat and potato starch granules based on local mechanical contrast. J. Food Eng., 128, 69-102.

Schroeter J. and Hobelsberger M., 1992. On the mechanical properties of native starch granules. Starch/Starke, 44,7, 247-252.

Singh N., Singh J., Kaur R., Sodhi N.S., and Gill B.S., 2003. Morphological, thermal and rheological properties of starches from different botanical sources. Food Chem., 81, 219-231.

Stasiak M. and Molenda M., 2004. Direct shear testing of food powders flowability - influence of deformation speed and apparatus stiffness. Acta Agrophysica, 4, 557-564.

Stasiak M., Molenda M., and Horabik J., 2007. Determination of modulus of elasticity of cereals and rapeseeds using acoustic method. J. Food Eng., 82, 51-57.

Stasiak M, Rusinek R., Molenda M., Fornal J., and Błaszczak W., 2011. Effect of potato starch modification on mechanical parameters and granules morphology. J. Food Eng., 102, 154-162.

Stasiak M., Tomas J., Molenda M., Rusinek R., and Mueller P., 2010. Uniaxial compaction behavior and elasticity of cohesive powders. Powder Technol., 203, 482-488.

Wang J., Wen H., and Desai D., 2010. Lubrication in tablet formulations. European J. Pharmaceutics Biopharmaceutics, 75, 1-15.

Yadav A.R., Guha M., Tharanathan R.N., and Ramteke R.S., 2006. Influence of drying conditions on functional properties of potato flour. European Food Res. Technol., 223, 553-560.

Zavareze E.R., Pinto V.Z., Klein B., Halal S.L.M., Elias M.C., Prentice-Hernandez C., and Dias A.R.G., 2012. Development of oxidized and heat-moisture treated potato starch film. Food Chem., 132, 344-350.

International Agrophysics

The Journal of Institute of Agrophysics of Polish Academy of Sciences

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