TY  - GEN
A1  - Ermeydan, Mahmut Ali
A1  - Cabane, Etienne
A1  - Hass, Philipp
A1  - Koetz, Joachim
A1  - Burgert, Ingo
T1  - Fully biodegradable modification of wood for improvement of dimensional stability and water absorption properties by poly(ε-caprolactone) grafting into the cell walls
N2  - Materials derived from renewable resources are highly desirable in view of more sustainable manufacturing. Among the available natural materials, wood is one of the key candidates, because of its excellent mechanical properties. However, wood and wood-based materials in engineering applications suffer from various restraints, such as dimensional instability upon humidity changes. Several wood modification treatments increase water repellence, but the insertion of hydrophobic polymers can result in a composite material which cannot be considered as renewable anymore. In this study, we report on the grafting of the fully biodegradable poly(ε-caprolactone) (PCL) inside the wood cell walls by Sn(Oct)2 catalysed ring-opening polymerization (ROP). The presence of polyester chains within the wood cell wall structure is monitored by confocal Raman imaging and spectroscopy as well as scanning electron microscopy. Physical tests reveal that the modified wood is more hydrophobic due to the bulking of the cell wall structure with the polyester chains, which results in a novel fully biodegradable wood material with improved dimensional stability.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 270 
KW  - ring-opening polymerization
KW  - confocal raman microscopy
KW  - epsilon-caprolactone
KW  - mechanical-properties
KW  - structural-characterization
KW  - stannous octoate
KW  - copolymers
KW  - degradation
KW  - composites
KW  - cellulose
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-97265
SP  - 3313
EP  - 3321
ER  - 
TY  - JOUR
A1  - Salama, Ahmed
A1  - Neumann, Mike
A1  - Günter, Christina
A1  - Taubert, Andreas
T1  - Ionic liquid-assisted formation of cellulose/calcium phosphate hybrid materials
JF  - Beilstein journal of nanotechnology
N2  - Cellulose/calcium phosphate hybrid materials were synthesized via an ionic liquid-assisted route. Scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis/differential thermal analysis show that, depending on the reaction conditions, cellulose/hydroxyapatite, cellulose/ chlorapatite, or cellulose/monetite composites form. Preliminary studies with MC3T3-E1 pre-osteoblasts show that the cells proliferate on the hybrid materials suggesting that the ionic liquid-based process yields materials that are potentially useful as scaffolds for regenerative therapies.
KW  - biomineralization
KW  - calcium phosphate
KW  - carbohydrates
KW  - cellulose
KW  - hybrid materials
KW  - ionic liquid
Y1  - 2014
U6  - https://doi.org/10.3762/bjnano.5.167
SN  - 2190-4286
VL  - 5
SP  - 1553
EP  - 1568
PB  - Beilstein-Institut zur Förderung der Chemischen Wissenschaften
CY  - Frankfurt, Main
ER  -