Polymers have numerous uses and have made our lives much more comfortable. One way is to help make your home smell fresh. (Adult supervision is recommended for this project.)
Gel air fresheners are able to scent the air for a long time because gelatin is a polymer. Specifically, the polymer is collagen, a protein that forms a matrix type structure, allowing the gelatin to hold its shape. The fragrance oil particles are suspended in the matrix of the gel which keeps the scent trapped inside. As the gel evaporates, the scent particles are released from the matrix, causing a continuous scent to be released from the air freshener.