Jump to main content
Jump to site search


A photocatalyst immobilized on fibrous and porous monolithic cellulose for heterogeneous catalysis of controlled radical polymerization

Author affiliations

Abstract

Natural fibrous cellulose (cotton) and household porous cellulose (sponge) as supporting monolithic materials were employed for the immobilization of a photoredox catalyst to prepare unique heterogeneous catalyst composites, which were able to effectively regulate controlled radical polymerization of diverse monomers under low energy visible light. Metalloporphyrin (e.g. zinc porphyrin), a highly efficient photocatalyst for photoinduced electron/energy transfer–reversible addition–fragmentation chain transfer (PET-RAFT) polymerization, was conjugated to the supports by effortless chemical grafting approaches. By virtue of the elasticity and robustness of cellulose monoliths, separation and recovery of the catalyst was accomplished through simply squeezing and washing with negligible catalyst leaching. The recyclability of the immobilized catalyst was comprehensively assessed, suggesting that catalytic performance had been sustained in the first three cycles. It is interesting to note that the catalytic activity of the composites after three cycles decreased due to demetallation of the zinc porphyrin during polymerization. Nevertheless, using free-base porphyrin with added co-catalyst (tertiary amine as a sacrificial agent) could prevent metal contamination of the final polymer products.

Graphical abstract: A photocatalyst immobilized on fibrous and porous monolithic cellulose for heterogeneous catalysis of controlled radical polymerization

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Oct 2017, accepted on 30 Oct 2017 and first published on 31 Oct 2017


Article type: Paper
DOI: 10.1039/C7PY01690E
Citation: Polym. Chem., 2018, Advance Article
  •   Request permissions

    A photocatalyst immobilized on fibrous and porous monolithic cellulose for heterogeneous catalysis of controlled radical polymerization

    Y. Chu, Z. Huang, K. Liang, J. Guo, C. Boyer and J. Xu, Polym. Chem., 2018, Advance Article , DOI: 10.1039/C7PY01690E

Search articles by author

Spotlight

Advertisements