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Fabrication of CeO2 nanoparticle-modified silk for UV protection and antibacterial applications
Zhisong Lu1, Cuiping Mao1, Mei Meng1
1Institute for Clean Energy & Advanced Materials, Faculty of Materials & Energy, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory for Advanced Materials & Technologies of Clean Energies, Chongqing 400715, China; Chongqing Engineering Research Center for Rapid Diagnosis of Fatal Diseases, Chongqing 400715, China.
Abstract:
To endow silk with UV-shielding ability and antibacterial activity, CeO2 nanoparticles were immobilized on silk surface via a dip-coating approach without changing silk structure. Surface density of the nanoparticles could be easily adjusted by controlling the number of dip-coating cycle. Enhanced thermal stability of the modified silk is exhibited in thermogravimetric analysis (TGA) and derivative thermogravimetric analysis (DTG). The excellent UV-protection ability and antibacterial property of the CeO2 nanoparticle-coated silk are demonstrated in UV-vis diffuse reflectance spectroscopy and colony-forming capability test, respectively. Based on the data, it can be concluded that CeO2 nanoparticles could be used as a very promising coating material to modify silk for UV-protection and antibacterial applications.
