Document Detail


The comparison of rheological properties of aqueous welan gum and xanthan gum solutions.
MedLine Citation:
PMID:  23218329     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Rheological properties of welan gum and xanthan gum solutions have been characterized systematically at various concentrations, temperatures and salinities. It is found that the viscoelasticity of welan gum is higher than that of xanthan gum at the same condition though the molecular weight of welan gum is lower. In view of this, welan gum will make a good performance in enhanced oil recovery, especially in high temperature and high salinity reservoirs. Network structure can be formed in solutions of welan gum and xanthan gum for the dynamic modulus has exponential relationship with the concentration. Moreover, the molecular aggregates of welan gum adopt a different arrangement with that of xanthan gum, adjacent double helices of welan gum arrange in parallel as the zipper model. The structure formed by zipper model is still stable in high temperature and high salinity.
Authors:
Long Xu; Guiying Xu; Teng Liu; Yijian Chen; Houjian Gong
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Publication Detail:
Type:  Journal Article     Date:  2012-10-13
Journal Detail:
Title:  Carbohydrate polymers     Volume:  92     ISSN:  1879-1344     ISO Abbreviation:  Carbohydr Polym     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2012-12-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8307156     Medline TA:  Carbohydr Polym     Country:  England    
Other Details:
Languages:  eng     Pagination:  516-22     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Shandong University, Jinan 250100, PR China.
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