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Synthesis and properties of silyl cellulose derivatives - a potentially new type of adhesives

Presentation held at 5th EPNOE International Polysaccharide Conference 2017, Jena, Germany
Synthese und Eigenschaften von Silylcellulose-Derivaten - ein potenziell neuer Typ Klebstoff
 
: Schaefer, Andreas; Hettrich, Kay; Volkert, B.

:
presentation urn:nbn:de:0011-n-4741794 (739 KByte PDF)
MD5 Fingerprint: 0299cdb5b2d7739a8442689429ffbd91
Created on: 30.11.2017


2017, 29 Folien
International Polysaccharide Conference <5, 2017, Jena>
English
Presentation, Electronic Publication
Fraunhofer IAP ()
adhesive; cellulose; methylcellulose; silylation; trimethylsilyl; synthesis; property

Abstract
Cellulose and other biopolymers are obtained from plants. Therefore, they are an almost inexhaustible raw material. More and more they become a valuable resource due to the change of industrial production chains to more sustainable procedures. In many applications cellulose derivatives are already used, such as methyl cellulose (MC) in wallpaper glue. By derivatization the properties of cellulose and MC can be varied. It is the aim of this work to make new fields of application accessible, e.g. as adhesives for furniture, packaging or wooden parts. In this study the hydrophilic/hydrophobic balance of several celluloses and MCs has been adjusted to get water dispersible products. These dispersions were tested for their adhesive properties. The hydrophobicity has been increased with hexamet hyldisilazane giving trimethylsilyl cellulose (TMSC) and trimethylsilyl methyl cellulose (TMSMC), respectively. Applying silylated cellulose derivatives directly is not common, yet. They are mainly used as a reaction intermediate but have the potential to represent a new type of dispersion adhesives. The substitutions of the products have been investigated via 13C-NMR and Raman spectroscopy. As well, the thermal behavior has been analyzed. For the use as a dispersion adhesive, 10 wt. % dispersions in water were made using an Ultra Turrax. In the beginning the dispersions were inhomogeneous but became gelatinous after some time. After gel formation the paste was sticky. An adhesive stress test according to DIN EN 204, 205 was made. Results show possible applications in furniture or interi or construction in dry rooms with low humidity.

: http://publica.fraunhofer.de/documents/N-474179.html