Marco Caggioni - Fellow, Elected 2026

Dr. Marco Caggioni has spent more than sixteen years at The Procter & Gamble Company (P&G) as a leading rheologist, driving the business and encouraging new rheologists in the company while remaining externally focused and engaging the academic community. Reflecting his capacity to simultaneously impact industry and the scientific community, Marco has authored over 55 publications and 24 patents focused on various rheological phenomena. His exceptional ability to bridge the gap between fundamental academic research and the solution of commercially significant problems sets him apart as a sustained contributor to the field. His work consistently demonstrates a unique talent for identifying industry-relevant issues and cleverly applying novel academic techniques, whether theoretical or experimental. Marco’s mastery areas include:

Collaboration: Dr. Caggioni is integral to the Society of Rheology ecosystem. In addition to being a leading technical contributor within P&G, he invests time into retaining academic connections and making public-domain contributions to rheology. He has led tens of industry-sponsored research and consulting programs (~$1.5M toward universities including Harvard, Lehigh, IUPUI, UNSW, Delaware, UCSB, U-Milano, Cornell, Georgetown, Fribourg, U-Cincinnati, Northeastern, and Washington University). Additionally, he has supported externally funded projects, such as co-authoring NSF GOALI project with Lehigh. He is also a lead contributor for the open source Github toolbox used to facilitate rheology curve fitting and AI integration: rheopy (https://github.com/rheopy ). Caggioni’ s commitment to fostering academia-industry collaboration is evident in his active mentorship of students and early career researchers, many of whom have gone on to work in both industrial and academic settings.

Characterization of Microstructured Liquids: Marco’s first two publications in the Journal of Rheology focused on microrheology of structured systems made from gellan gum and insoluble cellulose fibers. He masterfully adapted microrheology techniques to drive scale up and achieve product consistency on the manufacturing scale. Marco’s most cited articles regard arrested coalescence and engineering waxy/fatty dispersions (from food stuffs to shampoos). With an eye toward future applications, he also contributed to one of the first application of neural network to the rheology problem of inferring viscosity of a formulation from its chemical composition.

Microstructure Design: Marco’s “Three component model” has a large fan base since it represents a physically intuitive, and easy to understand variation of the Herschel-Bulkley description of yield stress fluid; the model combines the viscous contributions of background fluids with the yielding mechanics of packed emulsions, all while enabling description of the transitional flows that occur. The work has broad applications and is already widely cited as a basis for modeling and experimental studies. Complementing this, he presented at various SoR meetings showing how to design liquids through an additive approach of different microstructures, selectively (and independently) altering the background viscosity the yield stress and relaxation time in yield stress fluids. His authorship of articles on consumer product design is influencing curriculum at universities