Study of self-assembly of the lignin model compound on cellulose model substrate

Miodrag Micic, Ksenija Radotic, Milorad Jeremic, Roger M. Leblanc

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Herein we report a topographical study of the supramolecular organization of enzymatically polymerized lignin model compound - dehydrogenative polymer (DHP) of coniferyl alcohol - on cellulose substrate, using the Environmental Scanning Electron Microscopic (ESEM) technique. A comparison of deposits obtained by bulk polymerization in solution and direct polymerization in the presence of cellulose substrate shows distinct differences in supramolecular organization. DHP polymerized in solution expresses a 3-D structure with short-range ordered motifs, while the polymer formed in the presence of cellulose substrate arranges in a single layer compact structure consisting of several domains. Such structures could be described as a two-dimensional hexagonal close packed lattice(HCPL), with the dimension of unit cell in 1 μm range. The domains have a quite regular structure with few lattice defect forming a good example of two-dimensional colloidal crystal. The growth of DHP globules and their assembly into a supramolecular structures are interpreted in terms of cooperative electrostatic interaction of polymer precursors, with a framework of cellulose OH groups and interfacial interactions (hydrophilic/hydrophobic) in the course of the structure growth. The results strongly suggest that the carbohydrate matrix in plant cells can serve as a templates for lignin structure formation in the plant cell wall.

Original languageEnglish (US)
Pages (from-to)100-106
Number of pages7
JournalMacromolecular Bioscience
Volume3
Issue number2
DOIs
StatePublished - Feb 1 2003

Keywords

  • Biopolymers
  • Dehydrogenation
  • Environmental scanning electron microscopy (ESEM)
  • Lignin
  • Supramolecular structures

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry
  • Biomaterials
  • Polymers and Plastics
  • Materials Chemistry
  • Bioengineering

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