5.1 Basic Considerations 87
Figure 5.8 Atomic arrangement in an imogolite fiber with inside diameters of 1 nm and
outside diameters of 2 nm. The diameter of the tubes can be adjusted by changing the
silicon/aluminum ratio [4]. (Reproduced with permission by The Korean Chemical Society.)
OH
Si
O
Al
Figure 5.9 Bundle of imogolite fibers. (Koenderink et al. [5]) The fibers with diameters in
the range from 5 to 30 nm are arranged in a bundle. The length of these fibers may be up
to a few micrometers. (Reproduced with permission by Elsevier.)
500 nm
eter range. The surface area of imogolite is experimentally determined in the
range of 1000 ± 100 m
2 g
−1
. The Mohs hardness in the range from 2 to 3 is quite
low. Even when the length of the fibers suggests the application as a filler in a
composite with polymer matrix, the relatively low strength of these fibers keeps
the advantage of such composites limited.
Précédent

- 99/322

Suivant