3 years ago

Green Tea Makes Polyphenol Nanoparticles with Radical-Scavenging Activities

Green Tea Makes Polyphenol Nanoparticles with Radical-Scavenging Activities
Shu Zhang, Yiwen Li, Xiaokang Zhang, Siying Xiang, Fang Zhu, Peng Yang, Hao Guo
The constant demand for functional nanomaterials from natural biomass polymers usually requires new “green” synthetic strategies without using any foreign additives. Here, the green fabrication of a series of polyphenol nanoparticles (PNs) only from green tea extraction compounds is reported (i.e., tea polyphenols and theophylline). It is found that the nanoparticle formation process involves covalent copolymerization of monomers, as well as noncovalent self-assembly pathways. Additionally, the resulting PNs exhibit better free-radical scavenging activities compared with similar-sized, polydopamine-based synthetic melanin nanoparticles. This class of biomass-based functional nanoparticles is promising as green and effective antioxidant agents in general. Here, the fabrication of a series of polyphenol nanoparticles only from green tea extraction compounds via a “green” chemistry approach is described. The resulting antioxidant nanoparticles exhibit better free-radical scavenging activities than synthetic melanin nanoparticles.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700446

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