Releasable encapsulation compositions

A releasable encapsulation composition comprising:

• a plurality of capsules each comprising an amphiphilic material encapsulating a substance, wherein the substance comprises a bleach activator or a peroxygen compound, the amphiphilic material forming micelles around the substance, wherein the amphiphilic material has hydrophilic and hydrophobic portions, wherein the hydrophilic portion anchors the encapsulated substance and the hydrophobic portion forms a shell wall of the capsule, wherein the amphiphilic material has a hydrophilic-lipophilic balance within a range of from about 1 to about 20, wherein the capsules are stable at alkaline pH, and wherein the amphiphilic material is a modified N,N,N′,N′-Tetrakis(2-hydroxypropyl)ethylenediamine, a nanoparticle which is a sol-gel-condensation of 3-aminopropyl trimethoxy silane and tridecafluoro-1,1,2,2-tetrahydrooctyl triethoxysilane, a nanoparticle which is a sol-gel condensation of 3-aminopropyl trimethoxy silane and trimethoxy(3,3,3-trifluoropropyl)silane, a Guerbet ester, or a poly(stearyl methacrylate-co-acrylic acid);
• the substance being releasable from encapsulation by a change in association of the amphiphilic material onto the substance, triggered by a change in environment around the capsule, wherein the change in environment is dilution of a liquid in which the capsules are dispersed or a change in the pH of a liquid in which the capsules are dispersed.