Enzymatic synthesis of lignin-siloxane hybrid functional polymers

Endry Nugroho Prasetyo, Tukayi Kudanga, Roman Fischer, Reinhard Eichinger, Gibson S. Nyanhongo*, Georg M. Guebitz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

This study combines the properties of siloxanes and lignin polymers to produce hybrid functional polymers that can be used as adhesives, coating materials, and/or multifunctionalized thin-coating films. Lignin-silica hybrid copolymers were synthesized by using a sol-gel process. Laccases from Trametes hirsuta were used to oxidize lignosulphonates to enhance their reactivity towards siloxanes and then were incorporated into siloxane precursors undergoing a sol-gel process. In vitro copolymerization studies using pure lignin monomers with aminosilanes or ethoxytrimethylsilane and analysis by 29Si NMR spectroscopy revealed hybrid products. Except for kraft lignin, an increase in lignin concentration positively affected the tensile strength in all samples. Similarly, the viscosity generally increased in all samples with increasing lignin concentration and also affected the curing time.

Original languageEnglish
Pages (from-to)284-292
Number of pages9
JournalBiotechnology Journal
Volume7
Issue number2
DOIs
Publication statusPublished - Feb 2012
Externally publishedYes

Keywords

  • Biomaterials
  • Laccase
  • Lignin
  • Polymers
  • Siloxane precursors

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