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Photo-Sensitive and Degradable Polymeric Nanocapsules from Hyperbranched Poly(Amine Ester) Grafted Nano-Silica Templates

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A facile approach for the preparation of the photo-sensitive and degradable polymeric nanocapsules containing a number of hydroxyl groups was developed. The hyperbranched poly(amine ester) grafted silica nanoparticles (SN-HPAE) were cross-linked with 4,4ยด-Azobenzene dibenzoyl chloride (ADC) by the reaction between the hydroxyl groups and benzoyl chloride groups. Then the silica templates were removed by being etched with HF to produce the photo-sensitive and degradable polymeric nanocapsules. The hollow structure of the polymeric nanocapsules with the inner diameter in the range of 20-100 nm was characterized by transmission electron microscopy (TEM). The solid-state UV-vis spectra of the cross-linked hyperbranched polymeric nanocapsules showed the photoresponsive behavior of the azobenzene type molecules.

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Keywords: ADC; AE; AP-SN; APTES; DEA; DMF; DNA; FTIR spectrum; HDI; LbL; N=N bond; NMR; PTSA; Photo-sensitive; SN-HPAE; TEM; TGA; UV-vis spectrum; azobenzene; bond; degradable; electroluminescent devices; ethanol; hydroxyl groups; light-emitting diodes; nanocapsules; photovoltaics; polycondensation; polymerization; silica-templates

Document Type: Research Article

Publication date: 01 December 2010

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  • Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.
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