Mechanism for tuning the hydrophobicity of microfibrillated cellulose films through controlled thermal release of encapsulated wax

Abstract: Although films of microfibrillated cellulose (MFC) have good oxygen barrier properties due to its fine network structure, properties strongly deteriorate after absorption of water. In this work, a new approach has been followed for actively tuning the water resistance of a MFC fiber network by the inclusion of dispersed organic nanoparticles with encapsulated plant wax. The modified pulp suspensions have been casted into films and were subsequently cured at 40 to 220 °C. As such, static water contact angles can be specifically tuned from 120 to 150° by selection of the curing temperature in relation with the intrinsic transition temperatures of the modified pulp, as determined by thermal analysis. The appearance of encapsulated wax after curing was followed by a combination of morphological analysis, infrared spectroscopy and Raman mapping, showing balanced mechanisms of progressive release and migration of wax into the fiber network controlling the surface properties and water contact angles. Finally, the appearance of nanoparticles covered with a thin wax layer after complete thermal release provides highest hydrophobicity

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch
• Anmerkungen: Materials. 7, 11 (2014), 7196-7216, DOI 10.3390/ma7117196, issn: 1996-1944 ; IN COPYRIGHT http://rightsstatements.org/page/InC/1.0 rs

Klassifikation und Themen

• Klassifikation: Ingenieurwissenschaften und Maschinenbau

Beteiligte, Orts- und Zeitangaben

• Ereignis: Veröffentlichung
• (wo): Freiburg
• (wer): Universität
• (wann): 2014
• Urheber: Rastogi, Vibhore Kumar ; Stanssens, Dirk ; Samyn, Pieter
• Beteiligte Personen und Organisationen: Albert-Ludwigs-Universität Freiburg. Professur für Forstliche Biomaterialien ; Albert-Ludwigs-Universität Freiburg. Freiburg Institute of Advanced Studies ; Albert-Ludwigs-Universität Freiburg. Institut für Geo- und Umweltnaturwissenschaften ; Hermann-Staudinger-Graduiertenschule ; Albert-Ludwigs-Universität Freiburg. Fakultät für Umwelt und Natürliche Ressourcen ; Albert-Ludwigs-Universität Freiburg

Weitere Informationen

• DOI: 10.3390/ma7117196
• URN: urn:nbn:de:bsz:25-freidok-132496
• Rechteinformation: Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 15.08.2025, 07:21 MESZ