AAm-p-aramide

Teng et al. investigated the surface property of AAm-p-aramide membranes, aromatic polyamide membranes on which acrylamide (AAm) was grafted by plasma polymerization, by AFM [48]. The membranes were prepared for pervaporation of water/ethanol mixtures. The degree of grafting AAm onto aramide membranes was calculated according to the following equation ... 

Fig. 530a,b. AFM images of the surface of the AAm-p-aramide (8.2 wL%) membrane. a Two-dimensional image, b Three-dimensional image. Reprinted from [48]. Copyright 2000, with kind permission from Elsevier... 

Fig. 8.1. The relationship between the surface roughness and the separation factor and permeation rate for an AAm-p-aramide perva-poration membrane...

The separation factor and permeation rate of AAm-p-aramide membranes were higher than those of the unmodified aramide membrane. Optimum PV was obtained by an AAm-p-aramide membrane with a degree of grafting of 20.5% for a 90 wt% EtOH feed concentration, giving a separation factor of 200 and permeation rate of 325 g/m h. 

---