NDLI: Interactions between inorganic nanoparticles and cellulose nanofibrils

Content Provider	Springer Nature Link
Author	Nypelö, Tiina Pynnönen, Hanna Österberg, Monika Paltakari, Jouni Laine, Janne
Copyright Year	2012
Abstract	Nanofibrillated cellulose (NFC) is increasingly utilized in materials and biomedical applications consequently increasing interest in the modification of its surface properties. Besides modification using polyelectrolytes and polysaccharides, NFC can be combined with solid particles enabling formation of fibril network loaded with particles. Use of particles enabling easy functionalization could be beneficial for the development of hybrid structures, and lead to preparation of nanocomposites and functional materials. In order to explore interactions related to preparation of such structures, the interactions between nanosized precipitated calcium carbonate (nanoPCC) and nanoclay particles and NFC were examined by observing adsorption of the particles on NFC substrate using a quartz crystal microbalance with dissipation monitoring (QCM-D) and atomic force microscopy (AFM) imaging. By a treatment with carboxymethylated cellulose (CMC), the anionicity of the NFC substrate could be increased, providing an additional tool to affect the interplay between NFC and the inorganic particles. For slightly cationic nanoPCC particles an increase in the anionicity of the NFC by the CMC treatment increased the affinity, while the opposite was true for anionic nanoclay. Additionally, for interactions between nanoclay and NFC, dispersion stability was an important factor. QCM-D was successfully used to examine the adsorption characteristics of nanoparticles although the technique is commonly used to study the adsorption of thin polymer layers. Distinct adsorption characteristics were observed depending on the nanoparticle used; nanoclay particles deposited as a thin layer, whereas nanoPCC particles formed clusters.
Starting Page	779
Ending Page	792
Page Count	14
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	19
Issue Number	3
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-02-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cellulose nanofibrils Hybrid materials Nanoparticle adsorption Nanoclay Precipitated calcium carbonate Physical Chemistry Organic Chemistry Polymer Sciences Bioorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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