Forming nanospherical cellulose containers

Oshrat Tzhayik, Indra Neel Pulidindi, Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Nanospherical cellulose containers (SCC) (average size, ∼50 nm) are prepared by the sonochemical method. Organic and water-soluble materials are encapsulated within the SCC using only microcrystalline cellulose (MCC), an organic solvent, and water. Using silicotungstic acid (H4SiW12O40), the prepared SCCs can be catalytically converted (78 wt % conversion) to glucose (30 wt % glucose yield) by applying microwave irradiation for only 3 min. These results are attributed to the large increase of surface area of the cellulose sphere relative to MCC, and a better contact with the solid catalyst. Sealed in a vessel, SCCs were found stable for more than 6 months when stored at 4 °C or at room temperature. The encapsulation efficiency of the organic phase was measured and found to be approximately 90%. The creation of the sphere involves the degradation of the MCC to smaller fragments by high-intensity ultrasound irradiation, and the organization of these fragments in nanospheres involves the formation of bonds of the same type as those in regular cellulose (MCC). The structure and properties of SCCs were analyzed using high resolution scanning electron microscopy, Fourier transform infrared microscopy, 13C magic angle spinning NMR, X-ray diffraction, and fluorescence microscopy.

Original languageEnglish
Pages (from-to)13871-13880
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Issue number36
StatePublished - 10 Sep 2014

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Publisher Copyright:
© 2014 American Chemical Society.


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