Abstract:
The present invention relates to cellulose nanofibrils decorated with magnetic nanoparticles as well as a method for the preparation thereof and a material comprising the nanofibrils.
Abstract:
A transparent wood comprising at least one polymer and a wood substrate comprising more than 15 % lignin, measured as Klason lignin, and having an optical transmittance of at least 60%, as well as a method for its preparation.
Abstract:
Método para formar material de celulosa de nanopartículas magnéticas que comprende una red de nanofibras de celulosa, en el que se distribuyen regularmente nanopartículas de ferrita magnéticas sobre el material, y en el que el método comprende las etapas de: a. proporcionar material de celulosa que comprende una red de nanofibras de celulosa en forma de un gel, b. añadir el material de celulosa de la etapa (a) a una disolución de iones metálicos seleccionados de Co, Mn, Ni, Fe y Zn, c. precipitar los complejos de hidróxido/óxido metálico formados en la disolución de la etapa (b) extendiendo/distribuyendo los complejos precipitados sobre el material de celulosa, d. añadir los complejos de hidróxido/óxido metálico precipitados a una disolución alcalina que convierte los complejos de hidróxido/óxido en nanopartículas de ferrita magnéticas, y e. liofilizar o someter a intercambio de disolvente el material de celulosa de la etapa (d) para mantener las nanopartículas de ferrita magnéticas libres de aglomerado y distribuidas regularmente unidas físicamente sobre el material de celulosa.
Abstract:
The present invention relates to individual cellulose nanofibrils decorated with magnetic nanoparticles made of transition metal ions or an oxide thereof, as well as a method for the preparation thereof. The method of the present invention is performed in an oxidizing atmosphere, which gives a complete oxidation of the metal ions to hydroxide/oxide complexes and affords a strong attachment of the obtained complexes to the cellulose nanofibrils. The resulting metal ion complexes attach to the nanofibrils prior to the formation of the magnetic nanoparticles, thus preventing associations and agglomerations of the precipitated magnetic nanoparticles. Applications for the present invention include water purification, catalysis and biomedical applications.
Abstract:
A transparent wood comprising at least one polymer and a wood substrate comprising more than 15 % lignin, measured as Klason lignin, and having an optical transmittance of at least 60%, as well as a method for its preparation.
Abstract:
The present invention relates to cellulose nanofibrils decorated with magnetic nanoparticles as well as a method for the preparation thereof and a material comprising the nanofibrils.