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Supernodular aggregates

Supernodular aggregates—aggregates of nodular aggregates, from 1000 to 20 000 A (2 j,m) in diameter. [Pg.49]

As shown in Table 4.1, the mean diameter of the supernodular aggregates is 1.20 j,m. Figure 4.9 shows the AFM image of the top surface at a scan size of 1 pm. From Fig. 4.9, it seems that a supernodular aggregate contains smaller units that correspond to nodular aggregates, the mean diameter of which is 43.7 nm. Figure 4.10... [Pg.53]

It is interesting to note that the PPO-CS2 membrane with the supernodular aggregates exhibited the highest selectivity for the CO2/CH4 gas pair. Filling the interstitial gap between nodular aggregates may, therefore, lead to higher selectivity of the gas separation membrane. [Pg.56]

Samples Nodules (nm) Nodule aggregates (nm) Supernodular aggregates (nm)... [Pg.68]

The diameter of the nodules appears to be 20 and 16 nm for S and M membranes, respectively. For the H membrane, supernodular aggregates of 620 nm contained 6-8 nodule aggregates of 140 nm (Fig. 4.27). In addition to their small diameter (12 nm), the Si02 nodules are more discernable than those of M and S membranes. [Pg.68]

Khulbe and Matsuura characterized the dense PPO membrane etched by oxygen plasma [54] and studied the structural changes in the depth direction by AFM. Carbon disulfide was used as a solvent when the dense membrane was prepared. It should be recalled that unhke other solvents, carbon disulfide produced a dense PPO membrane, and supernodular aggregates could be observed on its surface. [Pg.70]

Fig. 4.31. Arrangement and size of supernodular aggregates and nodular aggregates in dense PPO-C 2 membrane. Reprinted from [54]. Copyright 2000, with kind permission from Elsevier... Fig. 4.31. Arrangement and size of supernodular aggregates and nodular aggregates in dense PPO-C 2 membrane. Reprinted from [54]. Copyright 2000, with kind permission from Elsevier...
Table 4.7. Mean width and length of the gap between supernodular aggregates after various etching times, at 5-gm scan range (A), and at l-gm scan range (B) in the PPO-CS2 membrane ... Table 4.7. Mean width and length of the gap between supernodular aggregates after various etching times, at 5-gm scan range (A), and at l-gm scan range (B) in the PPO-CS2 membrane ...
Fig. 8.5. Mean distance between supernodular aggregates at 5- xm scan range (4) and between nodular aggregates at 1- xm scan range B) in the PPO-CS2 membrane after various plasma etching times... Fig. 8.5. Mean distance between supernodular aggregates at 5- xm scan range (4) and between nodular aggregates at 1- xm scan range B) in the PPO-CS2 membrane after various plasma etching times...

See other pages where Supernodular aggregates is mentioned: [Pg.52]    [Pg.56]    [Pg.67]    [Pg.70]    [Pg.70]    [Pg.72]    [Pg.84]    [Pg.85]    [Pg.176]    [Pg.74]    [Pg.52]    [Pg.56]    [Pg.67]    [Pg.70]    [Pg.70]    [Pg.72]    [Pg.84]    [Pg.85]    [Pg.176]    [Pg.74]   
See also in sourсe #XX -- [ Pg.49 , Pg.67 , Pg.70 ]




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