Institute:

Technische Universität Dresden (TUD):
a) Chair of Wood and Fibrous Materials Technology and
b) Institute of Wood and Plant Chemistry

Address:

1. TU Dresden, 01062 Dresden, Germany
   Phone: +49 351 463-38101
   Fax: +49 351 463-3288
2. Postfach 1117, D 01735 Tharandt, Germany
   Phone: +49 35203 38 31239
   Fax: +49 35203 38 31201

Project leader:

Dr.-Ing. Alexander Pfriem (Alexander.Pfriem(at)tu-dresden.de)

Responsible co-worker:

Dipl.-Ing. Holger Unbehaun (a)
Dipl.-Ing. Sören Tech (a)
Dr. Martina Bremer (b)

Objectives:

At TUD two institutes, the Chair of Wood and Fibrous Materials Technology and the Institute of Wood and Plant Chemistry will participate in the present project.

The role of the Chair of Wood and Fibrous Materials Technology in the present project will be the preparation of different fibre substrates (hemp shieve fibre, hemp bast fibre) using double disc refiner for the production of refiner pulp. Analyses of beating degree, fibre sheets properties and sieve tests will be carried out.

In addition, mechanical and surface properties on polymer test samples made of modified and unmodified raw materials will be tested:

• Impact strength,
• Determination of dynamic sorption processes,
• Determination of creep performance,

The role of the Institute of Wood and Plant Chemistry in the present project will be chemical characterization of lignin and fibres before and after the enzymatic modification. Therefore different methods like NMR, GC-MS, Raman-Spectroscopy and wet chemical analyses for determination of functionally groups, methyl groups and saccharides will be used. Investigations on the correlations between the degree of modification and the strength properties will be carry out.

The quantification of VOC-emission will be carried out by thermal desorption combined with GC-MS. The aim is to find a correlation of the VOC-emission with the structural characteristics of lignin. A homogeneous distribution of the modification of lignin in lignocellulosic fibres is basic for strength properties and will be investigated by local reserved Raman-Spectroscopy.

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