Reactive prepolymers incorporating [2+2] photoreactive sites are synthesized. Upon exposure to UV light, these prepolymers undergo [2+2] cycloaddition to crosslink. When crosslinked, the reactive prepolymers form a hydrogel. Selective hydrogel formation is provided through selective exposure of the reactive prepolymer to UV light. Supports and other molecules may be attached or incorporated into the hydrogel through [2+2] cycloaddition with uncrosslinked [2+2] photoreactive sites present in the hydrogel.
合成了包含【2+2】光反应位点的反应性预聚物。在紫外光的照射下,这些预聚物会发生【2+2】环加成反应,形成交联物。交联后,反应性预聚物形成了一种
水凝胶。通过选择性地将反应性预聚物暴露在紫外光下,可以提供选择性
水凝胶形成。支撑物和其他分子可以通过与
水凝胶中存在未交联的【2+2】光反应位点的环加成反应来附着或纳入到
水凝胶中。