共轭亚油酸水相聚合制备荧光纳米点的性质研究  

Investigation on fluorescence characteristics of nanodots prepared by aqueous polymerization of conjugated linoleic acid

作　　者：曹崇梅 樊晔 方云 夏咏梅 CAO Chong-mei;FAN Ye;FANG Yun;XIA Yong-mei(The Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical&Material Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China)

机构地区：[1]江南大学化学与材料工程学院合成与生物胶体教育部重点实验室,江苏无锡214122

出　　处：《日用化学工业》2020年第12期815-820,共6页China Surfactant Detergent & Cosmetics

基　　金：国家重点研发计划项目资助(2017YFB0308705)。

摘　　要：以一种天然不饱和脂肪酸共轭亚油酸(CLA)为碳源,引发其共轭双键聚合制得平均粒径为16 nm且具有蓝绿光发射的荧光纳米点(FNDs)。与其他生物质碳源制备碳点(CDs)的报道相比,该法以生物质小分子的常温水相聚合反应控制FNDs形成,低温节能,安全性高。由于该法以共轭双键的加成聚合反应为主,因此反应可控性和产物粒径可控性强。实验结果显示该FNDs最佳激发波长为320 nm;随FNDs内部聚合度增大该FNDs由激发依赖性转变为部分激发依赖性;随碳源浓度增大出现自吸收性。该研究对利用天然油脂原料制备纳米材料有理论和实用意义,而碳源绿色化、产物生物相容性及水相聚合反应环境友好性使该FNDs具有在药物和日用化学品中应用的前景。Bluish-green light-emitting fluorescence nanodots(FNDs)were prepared by aqueous polymerization in virtue of conjugated double bonds of conjugated linoleic acid(CLA),indicative of an average particle size of 16 nm.The formation of the FNDs was conducted by polymerizing biomass small molecules in water at relatively low temperature,which was energy saving and safe compared with the reports of carbon dots(CDs)from other biomass carbon sources.This method was mainly based on the addition polymerization of the conjugated double bonds,indicative of good controllability for both reaction and particle size.The experimental results showed that,the FNDs had the optimal excitation wavelength of 320 nm;the excitation dependence would shift to partial excitation dependence when the degree of polymerization was increased;self-absorption had appeared as the concentration of carbon source was increased.Therefore,the study had theoretical and practical significance for the preparation of nanomaterials from natural fats and oils.The FNDs showed the potential of application in drugs and daily chemicals due to the green carbon source,the biocompatible product and the eco-friendly aqueous polymerization.

关 键 词：荧光纳米点 共轭亚油酸 荧光性质 水相聚合 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ658[化学工程—精细化工]