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ITS » Scientific Articles » Luar ITS
Posted by endry@bio.its.ac.id at 16/12/2014 17:12:08  •  1034 Views


ENZYMATIC SYNTHESIS OF LIGNIN SILOXANE HYBRID FUNCTIONAL POLYMERS

Author :
PRASETYO, ENDRY NUGROHO; KUDANGA, TUKAYI ( 197310142000121001; none )
FISCHER, ROMAN; EICHINGER, REINHARD   NYANHONGO, GIBSON S; GUEBITZ, GEORG M




ABSTRAK

This study combines the properties of siloxanes and lignin polymers to produce hybrid functional polymers that can be used as adhesives coating materials and for multi functionalized thin-coating films. ligninsilica hybrid copolymers were synthesized by using a sol-gel process. Laccases from Trametes hirsuto 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 copoly merization 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 gen erally increased in all samples with increasing lignin concentration and also affected the curing time.



KeywordsBiomaterials; Laccase; Lignin; Polymers; Siloxane precursors
 
Subject:  Lignin
Date Create: 11/07/2011
Type: Text
Format: PDF
Language: Indonesian
Identifier: ITS-Article-99015140000133
Collection ID: 99015140000133
Call Number: 676.5 Pra e


Source
article of Journal Biotechnology

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ITS Community

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© 1997-2014 CHEMIE.DE Information Service GmbH, All rights reserved




[ Download - Summary ]

ITS-Article-99015140000133-34781.pdf



[ Link of Contents]
  1. ENZYMATIC SYNTHESIS OF LIGNIN SILOXANE HYBRID FUNCTIONAL POLYMERS
    http://www.bionity.com/en/publications/276193/enzymatic-synthesis-of-lignin-siloxane-hybrid-functional-polymers.html



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