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Citation: YANG Hui, YANG Shi-Wei, WU Xu, ZHOU Ji-Zhu, WANG Jin-Ben. Syntheses and Surface Properties of a Novel Series of Polyamidoamine Branched with PPO-PEO Dendrimers[J]. Acta Physico-Chimica Sinica, ;2009, 25(09): 1806-1810. doi: 10.3866/PKU.WHXB20090832 shu

Syntheses and Surface Properties of a Novel Series of Polyamidoamine Branched with PPO-PEO Dendrimers

1.
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China

Received Date: 2 April 2009
Available Online: 6 July 2009

Dendrimers composed of G1 (generation 1.0) polyamidoamine (PAMAM) and branched with poly(propylene oxide) (PPO)-poly(ethylene oxide) (PEO) were synthesized. The dendrimer series was characterized using Fourier transform infrared (FTIR) spectrometry, mass spectrometry (MS), 1H nuclear magnetic resonance (NMR), and gel permeation chromatography (GPC). Results fromsurface tension and steady fluorescence measurements showed that the critical aggregation concentration (CAC) increased with longer PPO-PEO chains, while the microenvironment of solubilized pyrene became weakly polar. The size distribution of aggregates was examined using the dynamic light scattering (DLS) method, which indicated a narrow distribution and an average hydrodynamic radius (Rh) of around 100 nm. The effect of pH on this system was also investigated and showed that the length of amphiphilic branches played a large role in the protonation process.
- Dendrimer,
- PAMAM,
- Surface property,
- Aggregation behavior,
- pH effect
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