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Research on modifying effects of cellulose on the mechanical properties of chromium gel

  • Original Paper: Sol-gel and hybrid materials with surface modification for applications
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Abstract

A chromium gel formed through the cross-linking reaction with partially hydrolyzed polyacrylamide and Cr3+, known as Cr3+ gel, has been demonstrated to use in petroleum engineering for its special mechanical properties in this paper. This study has revealed that the addition of cellulose can successfully enhance the gas sealing ability of a gel slug in a wellbore. Scanning electron microscopy was employed to understand the cross-linked structure of the Cr3+ gel. Furthermore, the mechanical properties were studied, revealing that the maximum tensile strain increased from 2.07 to 3.45 with shear strains increasing from 1.32 to 1.45. Additionally, the cementing strength of modified gel characterized by the maximum pull-out force decreased from 13.1 to 7.2 N. The pull-out force changed smoothly with the displacement due to the viscous resistance increased. In this study, a systemic test method for the mechanical properties of Cr3+ gel was proposed, and the roles of cellulose in enhancing the toughness and viscosity of gel were attained.

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Acknowledgments

This study was supported by the Natural Science Foundation of Hubei (2015CFC858) and Innovation Fund of China National Petroleum Corporation (2014D-5006-0309).

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Correspondence to Man-Lai Zhang.

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Zhang, ML., Liao, RQ., Cheng, L. et al. Research on modifying effects of cellulose on the mechanical properties of chromium gel. J Sol-Gel Sci Technol 79, 201–209 (2016). https://doi.org/10.1007/s10971-016-4021-4

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  • DOI: https://doi.org/10.1007/s10971-016-4021-4

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