Biomimetic synthesis of suberin for new biomaterials
2005 (English)In: Appita Annual Conference: Vol 2, 2005, 561-564 p.Conference paper (Refereed)
Suberin is the biopolymer giving cork (oak bark) its hydrophobic and resistant characteristics. It acts as a diffusion barrier in bark and roots of plants. Similarly to lignin, it is a phenolic polymer with good affinity to cellulose and other wood polysaccharides, but it also contains polyaliphatic and strongly hydrophobic elements. In order to produce a lignin derivative similar to suberin, a desired lignin starting material should be of low molecular weight and have a high content of hydroxylic phenolic groups. By means of cross flow nanofiltration of softwood kraft pulping black liquor and pH-precipitation with diluted sulphuric acid, such a lignin has been obtained. Due to the fact that too much organics entering the recovery boiler frequently is the bottleneck for pulp production increases, a removal of part of the lignin can be economically very favourable. By using this lignin together with linola oil, a linseed oil with a large amount of unsaturated structures, an attempt was made to create a new hydrophobic lignin derivative similar tosuberin. The product was analysed with FT-IR, Fourier Transformed Infra Red Spectroscopy and GPC, Gel Permeation Chromatography. The suberin like material obtained from this lignin could be polymerised on thermo mechanical pulp fibres by means of Mn(III)-driven phenolic coupling. The ability of the suberin monomers to act as a hydrophobic paper coating was evaluated with contact angle measurements and the results indicate that this lignin derivative was potentially of interest due to its capability to interact well with wood fibres and make paper hydrophobic.
Place, publisher, year, edition, pages
2005. 561-564 p.
Biomaterials, Biomimetic materials, Biopolymers, Polysaccharides, Synthesis (chemical), Wood products
Engineering and Technology
Research subject SRA - Production
IdentifiersURN: urn:nbn:se:kth:diva-76159ScopusID: 2-s2.0-29344438017OAI: oai:DiVA.org:kth-76159DiVA: diva2:490918
ISSN: 14435454 Document Type: Conference Paper Source Type: Conference Proceeding 59th Appita Annual Conference and Exhibition, incorporating the 13th ISWFPC: International Symposium on Wood, Fibre and Pulping Chemistry, Auckland, 16 May 2005 through 19 May 2005
FunderXPRES - Initiative for excellence in production research
QC 201202292012-02-062012-02-062012-02-29Bibliographically approved