Fecha de publicación: -- Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE The figure primarily illustrates a strategy on the combination of chemical crosslinking constructed by TAIC (select moderate crosslinking density) with physical crosslinking from OMMT with different interlayer spacing (select larger interlayer spacing) that was employed to investigate their synergetic effect on SC-CO2 corrosion resistance and fabricate the high performance FKM composite with superior SC-CO2 corrosion resistance.

ABSTRACT
The carbon dioxide (CO2) miscible flooding is a key technology to enhance oil recovery and safely sequester carbon dioxide in the subsurface. It is well known that CO2 usually transforms from a gaseous to a supercritical state in the underground, and the supercritical CO2 (SC-CO2) is easier to cause corrosion and failure on packer rubber seals. It is significant to develop the novel rubber composites resistant to SC-CO2 corrosion in oil extraction and achieve the strategic goal of carbon capture, utilization and storage (CCUS). In this paper, triallyl isocyanurate (TAIC) as an assistant crosslinker and OMMT as a physical barrier agent were incorporated into the FKM composites. The effect of crosslinking density and OMMT on the corrosion resistance behavior was investigated. The results showed that during SC-CO2 corrosion, FKM composites with moderate crosslinking density exhibit superior corrosion resistance. Incorporating OMMT further enhances corrosion resistance and comprehensive mechanical properties. The anti-corrosion coefficient of FKM composites increased from 10.67% to 84.47%. The corrosion mechanism of SC-CO2 on FKM is mainly physical swelling, penetration and destruction of the crosslinking network. This study provides a novel strategy for chemical crosslinking and physical crosslinking from organic montmorillonite improving SC-CO2 corrosion resistance behavior of fluororubber.