Volume 39 Issue 6
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YANG Hao, YUE Qiansheng, ZHAO Qingmei.Synthesis and performance evaluation of nano SiO2 /acrylamide flocculant[J]. Drilling Fluid & Completion Fluid，2022, 39（6）：714-720 doi: 10.12358/j.issn.1001-5620.2022.06.008
Citation: YANG Hao, YUE Qiansheng, ZHAO Qingmei.Synthesis and performance evaluation of nano SiO2 /acrylamide flocculant[J]. Drilling Fluid & Completion Fluid，2022, 39（6）：714-720 doi: 10.12358/j.issn.1001-5620.2022.06.008
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Synthesis and Performance Evaluation of Nano SiO2 /Acrylamide Flocculant

doi: 10.12358/j.issn.1001-5620.2022.06.008

  • Yangtze University, College Of Chemistry& Environmental Engineering, Jingzhou, Hubei 434023

  • Received Date: 2022-06-13
  • Rev Recd Date: 2022-07-25
  • Publish Date: 2022-11-30
    Abstract
  • SiO2 of different particle sizes were prepared through sol-gel method using tetraethyl orthosilicate (TEOS) as the raw material. The SiO2 particles, after surface modification, was in turn used as raw material to react with acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) to produce nano SiO2/cationic polyacrylamide (SCPAM) through inverse emulsion polymerization. Characterization of the final product determines that it is the required product. Study on the effects of the SiO2 particle size and concentration on the molecular weight, water solubility, viscosifying performance and flocculating capacity of SCPAM shows that SCPAM made from 15 nm SiO2 at mass fraction of 0.9% of the whole reaction monomers has the best water solubility, viscosifying performance and flocculating capacity. Evaluation of a drilling fluid formulated with SCPAM as a flocculant shows that the drilling fluid has a final viscosity of about 30 mPa·s at salt concentration of 30%. After aging for 96 h, the viscosity of the drilling fluid is still about 33 mPa·s, meaning that the drilling fluid has good salt and high temperature resistance. It is also found that the drilling fluid works satisfactorily at drilled solids contents less than 5% and temperatures lower than 160 ℃.

     

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