原位聚合法制备碳点/聚丙烯酸复合粒子
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摘要
本文使用高分子材料聚丙烯酸为修饰剂,原位聚合法制备聚丙烯酸荧光复合微球。以水热法合成的荧光碳点为芯材,共同参与到聚丙烯酸合成过程中,以期得到核-壳式结构荧光复合微球。通过改变引发剂、丙烯酸单体用量等因素分析聚丙烯酸荧光复合微球粒径、表面电位、荧光强度及形貌的变化,确定聚丙烯酸荧光复合微球合成的最佳条件。
Polyacrylic acid(PAA)fluorescent composite microspheres were prepared by in-situ polymerization using PAA as modifier.In order to obtain core-shell structured fluorescent composite microspheres,the as-prepared carbon dots(CDs)can be used as a fluorescent core to participate in the synthesis process of PAA.The changes in particle size,surface potential,fluorescence intensity and morphology of PAA fluorescent composite microspheres were analyzed by changing the initiator and the amount of acrylic monomer.The optimum conditions for the synthesis of PAA fluorescent composite microsphere were determined.
Polyacrylic acid(PAA)fluorescent composite microspheres were prepared by in-situ polymerization using PAA as modifier.In order to obtain core-shell structured fluorescent composite microspheres,the as-prepared carbon dots(CDs)can be used as a fluorescent core to participate in the synthesis process of PAA.The changes in particle size,surface potential,fluorescence intensity and morphology of PAA fluorescent composite microspheres were analyzed by changing the initiator and the amount of acrylic monomer.The optimum conditions for the synthesis of PAA fluorescent composite microsphere were determined.
引文
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[3]Zhang Y P,Chen Y Y,Yang S J,et al.Effects of Organic and Inorganic Compound Fertilizer Application on Growth and Chlorophyll Fluorescence Characteristics in Melon Plants[J].Zhiwu Shengli Xuebao,2013,49(8):722-728.
[4]Li H,He X,Kang Z,et al.Water-soluble fluorescent carbon quantum dots and photocatalyst design[J].Angew Chem,Int Ed,2010,49(26):4430-4434,S/1-S/3.
[5]Zhou L,Li Z,Liu Z,et al.Luminescent Carbon Dot-Gated Nanovehicles for pH-Triggered Intracellular Controlled Release and Imaging[J].Langmuir,2013,29(21):6396-6403.
[6]Larson D R,Zipfel W R,Williams R M,et al.Water-Soluble Quantum Dots for Multiphoton Fluorescence Imaging in Vivo[J].Science(Washington,DC,U S),2003,300(5624):1434-1437.
[7]Liu R,Wu D,Liu S,et al.An Aqueous Route to Multicolor Photoluminescent Carbon Dots Using Silica Spheres as Carriers[J].Angew Chem,Int Ed,2009,48(25):4598-4601,S/1-S/9.
[8]Geys J,Nemmar A,Verbeken E,et al.Acute Toxicity and Prothrombotic Effects of Quantum Dots:Impact of Surface Charge[J].Environ Health Perspect,2008,116(12):1607-1613.
[9]Lin P,Chen J W,Chang L W,et al.Computational and Ultrastructural Toxicology of a Nanoparticle,Quantum Dot 705,in Mice[J].Environ Sci Technol,2008,42(16):6264-6270.
[10]Zhang T,Ge J,Hu Y,et al.A General Approach for Transferring Hydrophobic Nanocrystals into Water[J].Nano Letters2007,7(10):3203-3207.