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Investigation on Changes in Physical and Technological Properties of Water Soluble Sizing Agents During the Ultrafiltration Process. Part I: Ultrafiltration of Hydroxy Propyl Starch
Author(s) -
Bayazeed A.,
Trauter J.
Publication year - 1991
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19910430108
Subject(s) - ultrafiltration (renal) , filtration (mathematics) , starch , chemistry , rheology , permeation , molar mass distribution , viscosity , sizing , size exclusion chromatography , chromatography , membrane , chemical engineering , materials science , polymer , organic chemistry , composite material , mathematics , biochemistry , engineering , enzyme , statistics
The effect of ultrafiltration (UF) operation on the stability of a sizing agent based on starch has been studied. Hydroxypropyl starch (HPS) has been used as a water soluble modified starch. The investigation was carried out in two categories:a) effect of UF time (the concentration of the solution was kept constant by recirculating the permeate), and b) raising the concentration by discharging the permeate.The changes in the HPS solution properties were assessed by investigating the rheological properties (apparent viscosity as a function of filtration time, temperature and activation energy of flow) and molecular properties (Infra‐Red spectroscopy (IR), number of average molecular weight (Mn) and molecular weight distribution). The investigation was carried out on HPS solutions before, after and during the ultra‐filtration process. The results indicated that some degradation takes place during UF process.