Possibilities for the Physical Modification of Cellulose Shapes Using Ionic Liquids |
| |
Authors: | Frank Wendler Birgit Kosan Markus Krieg Frank Meister |
| |
Institution: | 1. Centre of Excellence for Polysaccharide Research, Thuringian Institute for Textile and Plastics Research, Breitscheidstr. 97, D-07407 Rudolstadt, Germany;2. Centre of Excellence for Polysaccharide Research, Thuringian Institute for Textile and Plastics Research, Breitscheidstr. 97, D-07407 Rudolstadt, Germany
Member of the European Polysaccharide Network of Excellence (EPNOE) www.epnoe.eu. |
| |
Abstract: | Summary: Functional cellulose shapes offer valuable properties for innovative application potentials in textile and medical products. Thereby excellent textile physiological properties of cellulose are allowed to be connected with novel application characteristics like bioactivity, electrical conductivity, heat storage or ability to adsorb liquids or gases. A very advantageous way to modify the properties of fibres, films or textile structures is to introduce particular additives via the Lyocell process. Regard to technical applications, functional additives will be able to incorporate themselves in the shape matrix and, in the case of using N-methylmorpholine-N-oxide monohydrate (NMMO) as solvent, implicate massive technological difficulties and deterioration of properties of the spinning dope. Beside a couple of limiting moments, ionic liquids (ILs) offer as direct solvents an excellent chance for physical modification of cellulose shapes. In contrast to NMMO, they exhibit a significantly higher thermal stability as well as a higher chemical resistance. ILs exhibit most widely a better dissolving capability for a number of different polymers. First results of the development of adsorber materials as well as novel bioactive fibres will be discussed and fibre characteristics will be given. |
| |
Keywords: | additives antibacterial activity cellulose ionic liquids lyocell fibres |
|
|