title: MoS₂ nanoplatelet fillers for enhancement of the properties of waterborne pressure-sensitive adhesives.
abstract: Nanocomposite pressure-sensitive adhesives (PSAs) composed of polyurethane (PU)/(meth)acrylates reinforced with MoS2 nanoplatelets were prepared by blending aqueous dispersions. MoS2 crystals were exfoliated by sonication in water in the presence of poly(vinylpyrrolidone) (PVP, molecular weight of 10,000 g mol(-1)) to prepare an aqueous dispersion. Waterborne colloidal polymer particles (latex) were synthesized by miniemulsion photopolymerization in a continuous tubular reactor. The adhesive and mechanical properties from the resulting nanocomposite films were determined as the MoS2 fraction was increased. A superior balance of viscoelastic properties was achieved with 0.25 wt % loading of the MoS2 nanoplatelets, leading to a tack adhesion energy that was three times greater than that for the original PSA.
authors.affiliation: POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta zentroa , Tolosa Hiribidea 72, Donostia-San Sebastián 20018, Spain.
authors.forename: Vesna
authors.initials: V
authors.lastname: Daniloska
authors.forename: Joseph L
authors.initials: JL
authors.lastname: Keddie
authors.forename: José M
authors.initials: JM
authors.lastname: Asua
authors.forename: Radmila
authors.initials: R
authors.lastname: Tomovska
keywords: MoS2 nanoplatelets; nanocomposites; polyurethane (PU)/(meth)acrylates; pressure sensitive adhesives (PSAs)