摘要
合成了以荧光材料罗丹明B/SiO2为核,交联聚N-异丙基丙烯酰胺(PNIPAM)为壳的具有核/壳结构的纳米颗粒。用氢氟酸除去二氧化硅模板核后,形成了核壳结构的温敏荧光微球。28～36℃范围内的温敏性实验表明,该粒子的低临界溶解温度(LCST)为33℃,具有温敏性,用SEM、TEM、XRD、FT-IR等手段对温敏荧光微球的组成和结构进行了表征和分析,探讨了磁性温敏纳米颗粒的制备机理。
Novel thermosensitive fluorescence nanoparticles are synthesized. Firstly, the core-shell composite microparticles were synthesized by precipitation polymerization with Rhodamine B entrapped SiO2 as core and cross-linked poly（N-isopropylacrylamide） （PNIPAM） as shell. Then, the SiO2 core was etched by hydrofluoric acid at certain condition and the pre-trapped Rhodamine B molecules remained within the inner cavity. It has been also shown that the modified Rhodamine B are featured by lower critical solution temperature （LCST） while the temperature varies from 28℃ to 36℃ . The composite thermosensitive fluorescence particles were characterized by XRD, SEM, TEM and FT-IR.
出处
《化学通报》
CAS
CSCD
北大核心
2007年第7期541-546,共6页
Chemistry
基金
江苏省教育厅自然科学基金(04KJB150016)
江苏省自然科学基金(BK2006061)
江苏省低维材料化学重点实验室开放课题(JSKC06029)资助
关键词
温敏
核壳
纳米颗粒
罗丹明B
Thermosenitive, Core-shell, Nanoparticles, Fluorescent-label, Rhodamine B, Poly （ N- isopropylacrylamide）
