Attachable/Detachable Sheets Containing Foam-Rubber Layers with Super Deodorant Functions

Abstract

Two-layered sheets consisting of a cellulose-nanofibril-containing foam-rubber layer and a base film or nonwoven sheet were developed as attachable/detachable sheets with super deodorant functions. TEMPO-oxidized cellulose nanofibrils with copper carboxylate groups (TOCNs-Cu) were composited with foam-rubber layers, which were coated on base films and sheets. These TOCNs-Cu-containing foam sheets adsorb H2S and NH3 gases well because these gas molecules are chemically or physically trapped by the foam layers. The TOCNs-Cu moieties are primarily located at the air/rubber interfaces in the foam-rubber layer. The peel and tack strengths of the TOCNs-Cu-containing foam sheets are appropriate for manual foam sheet attachment to, and detachment from, flat glass plates and plastic/ceramic boards. The H2S- and NH3-adsorption behaviors are affected by the air permeability of the base film or nonwoven sheet. Transmission electron microscopy images show that TOCNs-Cu aggregates are located at the air/rubber interfaces, which results in super deodorant functions.