| 摘要 |
<p>PURPOSE: A naocomposite is provided which is for coating or consolidation. CONSTITUTION: A composite material is characterised by a substrate based on glass fibres, mineral fibres or wooden fibres, and by a nanocomposite in functional contact therewith obtained by surface modification of (a) colloidal inorganic particles with (b) one or several silanes of the general formula (I): Rx-Si-A4-x, in which the radicals A are the same or different and represent hydroxyl groups or hydrolytically splittable groups, except for methoxy, the radicals R are the same or different and represent non hydrolytically splittable groups and x equals 0, 1, 2 or 3, or when the percentage of silane is at least 50, x≧1. This surface modification is carried out in the conditions of a sol-gel process with a substoichiometric amount of water, with respect to the available hydrolysable groups, forming a nanocomposite sol which if required is further hydrolysed and condensed before being brought into contact with the substrate and hardened.</p> |
