The disclosure discloses a method for synthesizing magadiite/PMMA nano composite microspheres by using pH value regulation in a Pickering emulsion. According to the method, organic modified magadiite is used as an emulsifier, deionized water of which a pH value is regulated with a buffer solution is used as a solvent, and a methylmethacrylate monomer is used as an oil phase of a Pickering emulsion; stirring is performed to form the stable Pickering emulsion, and then a water-soluble free-radical initiator is added to initiate emulsion polymerization, thereby synthesizing magadiite/PMMA nano composite microspheres.
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