ACTIVE POLYMER MATERIAL

Hirai T., Zheng J., Watanabe M., Electrically active polymer materials - application of non-ionic polymer gel and elastomers for artificial muscles in Tao X. (ed.) Smart Fibres, Fabrics and Clothing, Woodhead Publishing, Cambridge. 2001. 

Electrically active polymer materials -application of non-ionic polymer gel and elastomers for artificial muscles... 

It was also important to choose an appropriate substrate to coat the active polymer material onto. Hence, TFC membrane modules prepared with SPPOBr as the active layer coated on PEI hollow fibers spun from a PEI/NMP/GBL solution showed superior performances compared to those prepared from PEI/DMAc/LiN03 solutions. Coating on the lumen side of the fibers gave better performance than coating on the shell side. This could be due to the fact that the skin layer of the fibers was formed on the lumen side. Stability of the coated layer was greatly improved when a wet feed stream used instead of a dry feed stream. Water vapor in the feed stream most likely prevented the active layer from stress cracking on drying. Moreover the presence of water vapor in the membrane may have enhanced the permeance of CO2. 

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