Aqueous synthesis of amphiphilic graphene quantum dots and their application as surfactants for preparing of fluorescent polymer microspheres

作者：He, Jingbo; Li, Zhiyang; Zhao, Rujian; Lu, Yao; Shi, Lanqi; Liu, Jiyang^*; Dong, Xiaoping^*; Xi, Fengna

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2019, 563: 77-83.

DOI：10.1016/j.colsurfa.2018.11.064

• Amphiphilic graphene quantum dots
• Aqueous synthesis
• Mini-emulsion polymerization
• Particle surfactant
• Luminescent polystyrene microspheres

Amphiphilic carbon-based nanoparticles have recently attracted much attention in stabilizing Pickering emulsions owing to their low cytotoxicity, cost-effectiveness and biocompatibility. In this work, a facile and aqueous synthesis method was developed for the preparation of amphiphilic graphene quantum dots by modifying hydrophilic GQDs (GQDs-COOH) with hydrophobic hexylamine. Distinctive from pristine GQDs-COOH, amphiphilic GQDs show interesting surface-active properties and can stabilize water-in-cyclohexane Pickering emulsions. As efficient particle surfactants, amphiphilic GQDs could be applied in a mini-emulsion polymerization system to synthesize submicron-sized polystyrene particles. Particularly, the as-prepared PS particles were highly luminescent as produced by the highly fluorescent amphiphilic GQDs.

• 出版日期2019-2-20
• 单位浙江理工大学