Ergebnisse einschränken







    Université de Fribourg

    Strong, machinable, and insulating chitosan–urea aerogels: toward ambient pressure drying of biopolymer aerogel monoliths

    Guerrero-Alburquerque, Natalia ; Zhao, Shanyu ; Adilien, Nour ; Koebel, Matthias M. ; Lattuada, Marco ; Malfait, Wim J.

    In: ACS Applied Materials & Interfaces, 2020, vol. 12, no. 19, p. 22037–22049

    Biopolymer aerogels are an emerging class of materials with potential applications in drug delivery, thermal insulation, separation, and filtration. Chitosan is of particular interest as a sustainable, biocompatible, and abundant raw material. Here, we present urea-modified chitosan aerogels with a high surface area and excellent thermal and mechanical properties. The irreversible gelation of...

    Université de Fribourg

    Reinforced and superinsulating silica aerogel through in situ cross-linking with silane terminated prepolymers

    Iswar, Subramaniam ; Snellings, Geert M. B. F. ; Zhao, Shanyu ; Erni, Rolf ; Bahk, Yeon Kyoung ; Wangd, Jing ; Lattuada, Marco ; Koebel, Matthias M. ; Malfait, Wim J.

    In: Acta Materialia, 2018, vol. 147, p. 322–328

    Silica aerogels have only half the thermal conductivity of conventional insulation, but their application potential is limited by the poor mechanical properties. The fragility arises from the thin necks between the silica nanoparticle building blocks. Here, we produce strong silica aerogels through co-gelation of the polyethoxydisiloxane precursor with a variety of silane terminated...