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

• Autorzy: Stasiak M. , Molenda M. , Horabik J. , Mueller P. , Opalinski I.
• Języki publikacji: EN

Abstrakty

EN

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 approxi- mately 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 un- loading was found in the range from 19 to 42 MPa and increased with increase of moisture content and amount of lubricant.

Słowa kluczowe

EN

mechanical property; potato starch; moisture content; friction; elasticity; lubricant oil

• Wydawca: -
• Czasopismo: International Agrophysics
• Rocznik: 2014
• Tom: 28
• Numer: 4
• Opis fizyczny: p.501-509,fig.,ref.

Twórcy

autor

Stasiak M.

• Institute of Agrophysics, Polish Academy of Sciences, Doswiadczalna 4, 20-290 Lublin, Poland

autor

Molenda M.

• Institute of Agrophysics, Polish Academy of Sciences, Doswiadczalna 4, 20-290 Lublin, Poland

autor

Horabik J.

• Institute of Agrophysics, Polish Academy of Sciences, Doswiadczalna 4, 20-290 Lublin, Poland

autor

Mueller P.

• Department of Mechanical Process Engineering, Otto-von-Guericke University, Universitatsplatz 2, 39106 Magdeburg, Germany

autor

Opalinski I.

• Department of Chemical and Process Engineering, Rzeszow University of Technology, Al.Powstancow Warszawy 12, 35-959 Rzeszow, Poland

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