Facile preparation of environmentally friendly and low-cost thermally responsive microspheres through suspension-emulsion polymerization

as a dispersant, sodium dodecyl sulfate as an emulsifier, azobisisobutyronitrile as an initiator, as well as styrene, methyl acrylate, methacrylic acid, and methyl methacrylate at a certain mass ratio with a 16-hour reaction time at 65 °C, enabled the production of TRMs with stable spherical structures, high expansion ratios, and smooth, defect-free surfaces. This work provides a facile and environmentally friendly strategy for preparing TRM, which has the potential to be used in industrial applications.