| 摘要 |
Disclosed is encapsulated active material product comprising: an active material encapsulated in a sol-gel derived material, the sol-gel derived material including a plurality of alkylsiloxy substituents and the sol-gel derived material obtained from: (a) at least one first alkoxysilane precursor having the formula (1): (R'O)3-Si-(CH2)n-Ar-(CH2)m-Si-(OR')3 where n and m are individually an integer from 1 to 8, Ar is a single-, fused-, or poly-aromatic ring, and each R' is independently a C1 to C5 alkyl group and (b) optionally, at least one second precursor having the formula (2) where x is 1, 2, 3 or 4; y is 0, 1, 2, 3; z is 0, 1; the total of x + y + z is 4; each R is independently an organic functional group; each an R' is independently a C1 to C5 alkyl group and R" is an organic bridging group, where the sol-gel derived material is the volume of acetone per mass of the dry sol-gel derived composition, when placed in excess acetone and the sol-gel derived material swellable to at least five times its dry mass, when placed in excess acetone, and where the amount of active material encapsulated by the porous sol-gel composition is from about 150 to about 1100% w/w. |
