<p>Nanocomposite sponges are a promising class of materials with prospective uses in the environmental, biomedical, and industrial fields. Traditional characterization approaches have struggled to fully evaluate their complicated fluid dynamics and interior structure. To circumvent these constraints, this work introduces a combination of microfluidic and photoacoustic microscopy (PAM) techniques, which offers information about the hydrodynamic behavior of nanocomposite sponges. A microfluidic chip was designed to deliver fluid evenly into the sponge. Two sponge variations were examined: a sodium alginate/polyvinyl alcohol (SA/PVA) sponge and a carbon dot-modified SA/PVA/CD sponge. The integration of microfluidic-PAM allowed for three-dimensional viewing of fluid propagation and absorption properties. Computational fluid dynamics (CFD) simulations first demonstrated flow distribution throughout the microfluidic channel. Major differences in fluid management were discovered between the two sponge types using comparative analysis. The SA/PVA/CD sponge demonstrated more controlled fluid transmission, with more focused pathways and reduced water entrapment compared to the SA/PVA sponge. Quantitative PAM analysis revealed that CD integration altered the sponge's fluid transportation, whereas fluid in the SA/PVA sponge spread along the structure and became trapped, further characterizing these two sponges and emphasizing their suitability for various applications. This research establishes a framework for investigating fluid dynamics in porous materials.</p>