DIFFERENT NANOFIBRILLATED CELLULOSE AND INNOVATIVE STRATEGIES DEVELOPED FOR THEIR USES IN COATING OR EXTRUSION
Because of the high potential of nanocellulose in different applications such as reinforcement or barrier enhancement of polymer nanocomposites, researchers have developed different routes to produce such cellulosic nanofillers. Several totally different materials are in fact described as NFC or MFC because process and/or pretreatment are usually different. The first target of the present work is to give an overview of the different kind of cellulose nanofibers and proposed a classification to differentiate each of them depending on the process, the pre- and the post-treatment. Moreover one of their main drawbacks is their gellike structure at very low concentration and the fact that films are obtained as soon as they are dried. This issue strongly limits their use in some important process like coating or extrusion. Thats why in a second part of this presentation, different solutions will be proposed to overcome this issue. Different kinds of nanocellulose have been prepared in this work. Morphology will be discussed and compared by Field emission gun scanning electron microscopy. New strategies to use this nanocellulose in coating and extrusion will be discussed. Concrete examples will be presented dealing with the impact of the treatment strategy. Concerning the coating, chemical grafting is proposed and their impact on viscosity of different suspensions is detailed. Regarding extrusion a pre-mix strategy is proposed. Thermal and mechanical properties of bionanocomposites are analyzed with TGA and tensile test. This new strategy allows addition in extruded bionanocomposite of 10％ nanocellulose which strongly increased Youngs modulus (8 times higher).
nanofibrillated cellulose chemical grafting drying process coating extrusion
Ju lien Bras Karim Missoum Nathalie Lavoine Artur Klamczynski Isabelle Desloges Naceur Belgacem William J Orts Alain Dufresne
Laboratoire de Ginie des Procides Papetiers (LGP2), UMR CNRS 5518, Grenoble INP-Pagora - 461, rue de USDA-ARS-WRRC, Bioproduct Chemistry Engineering, 800 Buchanan Street, Albany, CA 94710, USA
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
467-471
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）