Synthesis of novel modified acrylamide copolymers for montmorillonite flocculants in water-based drilling fluid

BMC Chemistry

Research

Shirin Faridi¹  Akbar Mobinikhaledi¹  Meisam Shabanian²  Hassan Moghanian³ 

[1] Department of Chemistry, Faculty of Science, Arak University, Arak, Iran;Faculty of Chemistry and Petrochemical Engineering, Standard Research Institute (SRI), P.O. Box 31745-139, Karaj, Iran;Materials and Energy Research Center, Dezful Branch, Islamic Azad University, Dezful, Iran;

关键词: Polyacrylamide;    Montmorillonite;    Flocculation agent;    Water-based drilling fluid;   

DOI  :  10.1186/s13065-023-01042-w

 received in 2023-02-08, accepted in 2023-09-15,  发布年份 2023

来源: Springer

【 摘 要 】

A study was conducted to treat the water-based drilling fluid through coagulation-flocculation. Innovative modified acrylamide copolymers were utilized as montmorillonite flocculants to improve drilling performance and reduce environmental contamination. A series of acrylamide copolymers was prepared by in situ free radical polymerization in aqueous medium using ammonium persulfate as a radical initiator. The chemical structure of the prepared copolymers was confirmed by FT-IR (Fourier-Transform Infrared Spectroscopy) and the polydispersity indices of the copolymers determined using gel permeation chromatography. Thermal gravimetric analysis showed that the copolymers have a very high temperature tolerance, i.e. they are stable up to 390 °C. In this paper, acrylamide copolymers were used as coagulant with cationic, anionic groups or both of them simultaneously. Consequently, in order to clarify the relationship between inhibitive properties, sedimentation volume measurement, SEM (scanning electron microscope), XRD (X-ray diffraction) and contact angle were adopted. Some factors including molecular weight and molecular chain affecting the interaction between copolymers and clay particles were analyzed. Anionic sample with the highest molecular weight can reduce the interlayer spacing of the hydrated clay to the minimum. Amphoteric sample exhibits the best performance as a coagulant in comparison with other copolymers.

【 授权许可】

CC BY   
© Springer Nature Switzerland AG 2023

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