Grafting of cellulose fibers with poly(epsilon-caprolactone) and poly(L-lactic acid) via ring-opening polymerization

Hanna Lonnberg, Qi Zhou, Harry Brumer, Tuula T. Teeri, Eva Malmstrom, Anders Hult*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In this study, ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL) and L-lactide (L-LA) has been performed from cellulose fibers. The hydroxyl groups on cellulose act as initiators in the polymerization, and the polymers are covalently bonded to the cellulose fiber. As an attempt to introduce more available hydroxyl groups on the surface, and thereby obtain higher grafting efficiency in the ROP of epsilon-CL and L-LA, unmodified paper was modified with xyloglucan-bis(methylol)-2-methylpropanamide(XG-bis-MPA) and 2,2-bis(methylol) propionic acid (bis-MPA), respectively. The grafted substrates were characterized via Fourier transform infrared spectroscopy (FTIR), contact angle measurement, atomic force microscopy, and enzymatic degradation. The results showed a successful grafting of poly(epsilon-caprolactone) (PCL) and poly(L-lactic acid) (PLLA) from the cellulose fiber surfaces. Furthermore, the results showed an improved grafting efficiency after activation of the cellulose surface with bis-MPA, and showed that the amount of grafted polymer could be controlled by the ratio of added free initiator to monomer.

Original languageEnglish
Pages (from-to)2178-2185
Number of pages8
JournalBiomacromolecules
Volume7
Issue number7
DOIs
Publication statusPublished - 10 Jul 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • SURFACE CHEMICAL MODIFICATION
  • L-LACTIDE
  • LIVING POLYMERIZATION
  • EPSILON-CAPROLACTONE
  • CYCLIC ESTERS
  • BIOCOMPOSITES
  • COMPOSITES
  • POLYMERS
  • STARCH
  • BIOPOLYMERS

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