Morphological Design of Mesoporous Hybrid Materials - Mesoporous Organic-Inorganic Non-Siliceous Hybrid Materials - page 70

Lastly, maintenance of crack-free morphology after template removal.
This point is very important for monoliths, but in most cases, it is very diffi-
cult to achieve. Indeed, after removing surfactant templates by extraction or ion
exchange, the framework shrinks more or less, inducing the crack of monoliths.
Using the CO 2 supercritical method or lyophilization can help to retain integral
monoliths to a large extent, but these techniques have been seldom applied in the
preparation of mesoporous hybrid materials, further exploration is of considerable
value from the scientific point of view.
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