Effect of surfactant concentration on the synthesis of hydrogel microbeads using the emulsion polymerization process for acrylamide/acrylic acid copolymersNutthakritta Philaiwan, Siriporn Pranee and Samitthichai SeeyangnokE3S Web Conf., 679 (2025) 01030DOI: https://doi.org/10.1051/e3sconf/202567901030