Cylindrical micelles of a POSS amphiphilic dendrimer as nano-reactors for polymerization

Jing Ting Weng, Tso Fan Yeh, Ashok Zachariah Samuel, Yi Fan Huang, Jyun Hao Sie, Kuan Yi Wu, Chi How Peng, Hiro O. Hamaguchi, Chien Lung Wang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A low generation amphiphilic dendrimer, POSS-AD, which has a POSS core and eight amphiphilic arms, was synthesized and used as a nano-reactor to produce well-defined polymer nano-cylinders. Confirmed by small-angle X-ray scattering (SAXS), Raman and NMR spectrometry, monodispersed cylindrical micelles that contain a hydrophilic cavity with a diameter of 2.09 nm and a length of 4.26 nm were produced via co-assembling POSS-AD with hydrophilic liquids, such as H2O and HEMA in hydrophobic solvents. Taking the HEMA/POSS-AD cylindrical micelles as nano-reactors, polymerization of HEMA within the micelles results in polymer nano-cylinders (POSS-ADNPs) with a diameter of 2.24 nm and a length of 5.02 nm. The study confirmed that despite the inability to maintain specific shape in solution, low generation dendrimers form well-defined nano-containers or nano-reactors, which relies on co-assembling with hydrophilic guest molecules. These nano-reactors are robust enough to maintain their shape during the polymerization of the guest molecules. Polymer nano-cylinders with dimensions less than 10 nm can thus be produced from the HEMA/POSS-AD micelles. Since the chemical structure of low-generation dendrimers and the contents of the co-assembled nano-reactors can be easily adjusted, the concept holds the potential for the further developments of low-generation amphiphilic dendrimers.

Original languageEnglish
Pages (from-to)3509-3517
Number of pages9
JournalNanoscale
Volume10
Issue number7
DOIs
Publication statusPublished - 2018 Feb 21
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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    Weng, J. T., Yeh, T. F., Samuel, A. Z., Huang, Y. F., Sie, J. H., Wu, K. Y., Peng, C. H., Hamaguchi, H. O., & Wang, C. L. (2018). Cylindrical micelles of a POSS amphiphilic dendrimer as nano-reactors for polymerization. Nanoscale, 10(7), 3509-3517. https://doi.org/10.1039/c7nr07565k