Carboxylized graphene oxide nanosheet for shale plugging at high temperature

[Display omitted] •A modified carboxylation has been proposed.•The relative percentage of carboxyl groups was 24.3% in GO-COOH.•After hydrothermal at 180 °C, GO-COOH still maintained good dispersion performance.•Pressure transmission time of 0.1 wt% GO-COOH was 12 times that of 1 wt% silica. Graphen...

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Bibliographic Details
Published in:Applied surface science 2021-08, Vol.558, p.149901, Article 149901
Main Authors: Zhang, Hao, Yao, Jing, Zhang, Shifeng, Chen, Haiqun
Format: Article
Language:English
Subjects:
Carboxylation
Graphene oxide
Plugging agent
Water-based muds
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Summary:[Display omitted] •A modified carboxylation has been proposed.•The relative percentage of carboxyl groups was 24.3% in GO-COOH.•After hydrothermal at 180 °C, GO-COOH still maintained good dispersion performance.•Pressure transmission time of 0.1 wt% GO-COOH was 12 times that of 1 wt% silica. Graphene oxide nanosheet was carboxylated and the relative percentage of carboxyl groups was 24.3% in carboxylated graphene oxide (GO-COOH), which is pretty higher than previous reports. After hydrothermal at 180 °C, GO-COOH kept the particle size distribution at 600 nm and the retaining carboxyl groups made GO-COOH still have pretty good dispersibility, thus increasing the high-temperature resistance. Moreover, the time of core pressure transmission of 0.1 wt% GO-COOH was 12 times that of 1 wt% silica and 4 times that of 4 wt% polypropylene glycol and polyether alcohol, indicating GO-COOH can be a novel and efficient high-temperature resistant plugging agent used in water-based muds.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2021.149901