Acid surface modified carbon nanotube-filled fluoroelastomers aging test in oil-based drilling fluids. (December 2017)

• Record Type: Journal Article
• Authors: Heidarian, Javad
• Is Part Of: Journal of elastomers and plastics. Volume 49:Number 8(2018)
• Page Start: 706
• Page End: 737
• Publication Date: 2017-12
• Subjects: Acid surface–modified carbon nanotube -- fluoroelastomer -- oil-based drilling mud -- aging test -- atomic force microscopy -- optical microscopy; Plastics -- Periodicals; Elastomers -- Periodicals; 668.405
• DOI: 10.1177/0095244317695362
• Languages: English
• ISSNs: 0095-2443

Abstract

Acid surface–modified carbon nanotube (ACNT)-, carbon nanotube (CNT)-filled fluoroelastomer (FE), and unfilled-FE compounds were prepared (ACNT/FE, CNT/FE, and FE). The oil-based drilling (OBD) mud aging resistances of these elastomers were assessed by tests of weight gain, swelling, atomic force microscopy (AFM), and optical microscopy. The results show that for ACNT/FE-OBD (OBD mud tested ACNT/FE) and CNT/FE-OBD, there are no blisters, cracks, swellings, and deformed or uneven surfaces; however, for FE-OBD surfaces, these defects exist. ACNT/FE-OBD and CNT/FE-OBD have very low swelling, while for FE-OBD, the swelling is negative which indicates OBD chemical degradation of FE-OBD. All samples under study show low weight gain. AFM results show that roughness and average height of FE-OBD surface decreased considerably compared to that of FE. However, the changes in AFM results of ACNT/FE-OBD and CNT/FE-OBD compared to ACNT/FE and CNT/FE, respectively, are minor. ACNT/FE-OBD has a rougher surface with more average height and height variations compared to CNT/FE-OBD. Optical microscopy images show that the surface of FE-OBD is full of cracks but those of ACNT/FE-OBD and CNT/FE-OBD have no cracks. This study indicates that FE is not resistant to OBD, while ACNT/FE and CNT/FE are resistant to OBD.