Preparation And Properties Of Environmental Responsive Carbon Quantum Dots Copolymer

Carbon Quantum Dots(CQDs)are a new class of carbon nanomaterials with sizes below 10 nm that recently attracted wide attention because of their strong fluorescence,for which they are referred to as fluorescent carbon.Most of the current researches focus on the luminescent properties of carbon dots and their applications in biological area.In this work,three kinds of CQD co-polymer we synthesized by radical polymerization and hydrothermal method.We also studied the effect of synthesis conditions on the properties of carbon dots,and explored the conditions for their synthesis.1.The carbon quantum dots were synthesized by microwave method,and the effects of different temperature and time on the fluorescence intensity and quantum yield of carbon quantum dots were investigated.The carbon quantum dots with good fluorescence properties and high amino content were obtained.Then the carbon quantum dots were grafted on the surface of the carbon quantum dots to make the carbon quantum dots polymerized.Then the copolymerization of DEA to synthesize a thermosensitive copolymer containing carbon quantum dots.The UV-vis and fluorescence spectrum was used to characterize the fluorescence properties.2.The copolymer of AA,DEA and polymerizable carbon quantum dots was used to synthesize a multiple-response copolymer.This carbon quantum dots copolymer showed good thermo-sensitivity,pH-sensitivity and fluorescence properties.3.In this paper,one step hydrothermal method is used to directly synthesize the polymer with a carbon quantum dot in the side chain.This method is relatively simple compared with the free radical polymerization,and the product also shows the thermo-sensitivity and pH-sensitivity.