Low fracturing efficiency and high permeability filtration present substantial challenges during the fracturing development of coalbed methane (CBM), significantly hindering its efficient exploitation. In this study, a cross-linker featuring specific polar functional groups on its side chains was synthesized, and a multi-functional coupling evaluation apparatus was developed to systematically investigate the performance characteristics of water-based fracturing fluids. Furthermore, molecular dynamics simulations were employed to elucidate the microscopic mechanisms by which the modified cross-linkers and various external factors influence CBM extraction efficiency. The results indicated that... More >