首页|Multiarm Star Poly(ε-caprolactone) with Hyperbranched Polyamidoamine as Core Capable of Selective Accommodating Cationic or Anionic Guests

Multiarm Star Poly(ε-caprolactone) with Hyperbranched Polyamidoamine as Core Capable of Selective Accommodating Cationic or Anionic Guests

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Hyperbranched polyamidoamines (HPAs) were directly employed as macroinitiators to initiate the Sn(Oct)2 catalyzed ring-opening polymerization of ε-caprolactone (CL),resulting in multiarm star copolymers with poly(ε-caprolactone) (PCL) as shells and HPA as core (HPA-b-PCL).From 1H-NMR characterization it was deduced that both the primary amines and the secondary amide groups of HPAs could initiate the CL polymerization,and the initiation efficiency increased when more CL monomers were fed.The average arm-numbers of the obtained stars were in the range of 115-353.Differential scanning calorimetry measurements demonstrated that the melting and crystallization temperatures,fusion and crystallization enthalpy and the degree of crystallinity of the star polymers increased as the PCL arm length increased.HPA-b-PCL stars could be used as nanocarriers to efficiently accommodate anionic dyes at acidic condition,while load cationic dyes at basic condition.Compared with the dye-loading behavior of multiarm star PCL with the neutral hyperbranched polyglycerol as core,it was deduced that HPA-b-PCL nanocarriers accommodated anionic dyes using the HPA core,while loaded cationic dyes using both the HPA core and the PCL shell.Dynamic light scattering analyses also supported such deduction.Furthermore,HPA-b-PCL nanocarriers could selectively load the anionic Eosin Y or the cationic methylene blue from their mixture at pH =6 or 9,respectively,realizing their separation.

NanocarrierHyperbranchedPolyamidoaminePoly(ε-caprolactone)Star polymers

Chen Zhan、Si Li、Jin Cui、Yu Chen

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Department of Chemistry, School of Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China

National Foodstuff Inspection Center, Tianjin Product Quality Inspection Technology Research Institute,Tianjin 300384, China

This work was financially supported by the National Natural Science Foundation of ChinaThis work was financially supported by the National Natural Science Foundation of China

2107408831201426

2015

10.1007/s10118-015-1651-x

高分子科学(英文版)
中国化学会　中国科学院化学研究所

高分子科学(英文版)

CSTPCDCSCDSCI
影响因子：0.721
ISSN：0256-7679
年,卷(期)：2015.33(6)
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