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Citation: LIU Xiang, LÜ Wei, LI Qian-Ding. Rheological and Water-loss Control Properties of Crosslinking and Carboxymethylation Composite Modified Starch[J]. Chinese Journal of Applied Chemistry, ;2007, 24(3): 357-360. shu

Rheological and Water-loss Control Properties of Crosslinking and Carboxymethylation Composite Modified Starch

1.
School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065

Corresponding author: LIU Xiang,
Received Date: 12 April 2006
Available Online: 23 July 2006

Composite modified starch(CCMS) with a high viscosity was prepared by means of crosslinking and carboxymethylation with potato starch and chloroactic acid as the major raw material. The rheological and water-loss control properties of CCMS were investigated in detail. The mechanism of water-loss control was also explored. The results show that the paste of CCMS with a dosage of 0.5%~4.0% behaved as a pseudoplastic liquid at 20℃ to 60℃, which conformed to the empirical formula of the Ostwald-De waele equation η_a=Kγ^n-1; CCMS was compared with MV-CMC, and it was found that the performance indexes for viscosity increase and water-loss control of CCMS matched that of MV-CMC when the loading of CCMS was only 57% and 75% that of MV-CMC in saturated salt water mud and 4% salt water mud, respectively.
- composite modified starch,
- sodium carboxymethyl starch,
- rheological property,
- pseudoplastic fluid,
- filtration reducing agent
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