Heteropolyacids and sulfonic acid-bifunctionalized organosilica spheres for efficient manufacture of cellulose acetate propionate with high viscosity

Zhang, H., Wu, L., Zhang, Y., An, S., Miras, H. N. and Song, Y.-F. (2020) Heteropolyacids and sulfonic acid-bifunctionalized organosilica spheres for efficient manufacture of cellulose acetate propionate with high viscosity. Cellulose, 27(5), pp. 2437-2453. (doi: 10.1007/s10570-019-02936-6)

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Abstract

Cellulose acetate propionate (CAP), a high value-added chemical, is traditionally prepared using H2SO4 as catalyst. Replacement of the mineral acids by solid acids is current research focus for green and sustainable production of CAP. Herein, we reported the fabrication of novel solid acid catalyst HPW/Si(Et)Si-Dim-SO3H (Si(Et)Si = ethyl-bridged organosilica and Dim = dihydroimidazole) by incorporating phosphotungstic acid (HPW) and sulfonic acid-based Brønsted acidic ionic liquids onto the organosilica nanospheres of the designed catalyst for efficient manufacture CAP via esterification. The results indicated that the as-prepared HPW/Si(Et)Si-Dim-SO3H with 7.5% HPW loading showed the best catalytic performance at 45 °C in 3 h and the resulting CAP exhibited viscosity of 447 mPa s, Mw of 102,882 and DS of 2.69. Most importantly, the HPW/Si(Et)Si-Dim-SO3H exhibited high catalytic stability over six consecutive cycles and the obtained products were stable too with similar DS, Mw and viscosity. As such, the designed heteropolyacids and sulfonic acid-bifunctionalized heterogeneous catalyst is highly promising for biomass conversion under mild conditions.

Item Type:Articles
Additional Information:This research was supported by the National Key Research and Development Program of China (2017YFB0307303), the National Nature Science Foundation of China (21625101, 21521005, 21808011), Postdoctoral Science Foundation of China (2018M631313) and the Fundamental Research Funds for the Central Universities (XK1802-6, XK1803-05, XK1902, 12060093063).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Moiras, Professor Haralampos
Authors: Zhang, H., Wu, L., Zhang, Y., An, S., Miras, H. N., and Song, Y.-F.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Cellulose
Publisher:Springer
ISSN:0969-0239
ISSN (Online):1572-882X
Published Online:09 January 2020

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