Biguanide-, imine-, and guanidine-based networks as catalysts for transesterification of vegetable oil
Name
Hammond_Biguanide imine.pdf
Size
1.27 MB
Format
Adobe PDF
Checksum (MD5)
fa32adbd6a7d662d762174929cce6b59
Author(s)
Fasoli, Ezio
Alvarez, Michael
Hatton, T. Alan
Barletta, Gabriel L.
Bromberg, Lev E.
Date Issued
April 2010
Journal
Reactive and Functional Polymers
Publisher
Elsevier
Citation
Bromberg, Lev, Ezio Fasoli, Michael Alvarez, T. Alan Hatton, and Gabriel L. Barletta. “Biguanide-, Imine-, and Guanidine-Based Networks as Catalysts for Transesterification of Vegetable Oil.” Reactive and Functional Polymers 70, no. 7 (July 2010): 433–441.
Version
Author's final manuscript
Abstract
Polycationic systems based on poly(hexamethylene biguanide) (PHMBG), branched polyethyleneimine (PEI) and poly(N-vinylguanidine) (PVG) have been evaluated as heterogeneous catalysts for the transesterification of sunflower oil by methanol. Insoluble networks are synthesized via cross-linking of PHMBG by either 4,4′-methylenebis(N,N-diglycidylaniline) or polyisocyanate prepolymer, PEI with sebacoyl chloride, and PVG with 1,4-butanediol diglycidyl ether. PHMBG and its cross-linked networks appeared to be remarkably efficient catalysts, enabling 80–100% triglyceride conversion within 0.5 h at 70 °C. PEI-based networks catalyzed triglyceride transesterification with rates 8- to 12-fold slower than their PHMBG-based counterparts. The PVG-based networks, which were devoid of hydrophobic moieties, appeared to be inefficient catalysts due to limited accessibility of the basic guanidine groups to reactants. The PHMBG networks were shown to be recyclable by a simple centrifugal filtration. After 15 cycles of recovery and reuse, only 10–15% decline in performance was observed.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-NoDerivatives
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.reactfunctpolym.2010.04.003
