The disclosure relates to a biomaterial that comprises an aqueous phase, polymer network, a second polymer included in said disclosure invention more particularly relates to a biomaterial including an aqueous phase and a first polymer network made of a first proteic or saccharidic polymer or a mixture of first proteic and saccharidic polymers, wherein the first polymer network and the aqueous phase define a first gel (A), the biomaterial including: a second proteic or saccharidic polymer or a mixture of the second proteic and saccharidic polymers, either in solution in the aqueous phase of the gel (A) or in the form of a gel (B), and a first enzyme for degrading said second polymer or second polymer network. The disclosure also relates to a method for making biomaterials, and to the uses of the biomaterial particularly for releasing active substances, and to a device for the controlled release of active substances that include the biomaterial. The disclosure can particularly be used in the field of cosmetics and pharmaceuticals.