| abstract |
The hydrophilic composite structure is prepared by impregnating the 3DL structure with a polyurethane foam formulation and curing the formulation to create a foam that takes up space within the 3DL structure. The composite structure has an unprecedented good capacity for retaining water even under compressive forces. They also exhibit a maximum moderate swelling when saturated with water. The foam is useful as a layer of a water containment system such as a green roof or blue roof system. |