Mechanical properties of natural rubber nanocomposites reinforced with cellulosic nanoparticles obtained from combined mechanical shearing,and enzymatic and acid hydrolysis of sisal fibers |
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| Authors: | Gilberto Siqueira Sandra Tapin-Lingua Julien Bras Denilson da Silva Perez Alain Dufresne |
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| Institution: | 1.The International School of Paper, Print Media and Biomaterials (Pagora),Grenoble Institute of Technology,Saint Martin d’Hères Cedex,France;2.Institut Technologique FCBA,Grenoble Cedex 9,France;3.Departamento de Engenharia Metalurgica e de Materiais,Universidade Federal do Rio de Janeiro (UFRJ), Coppe,Rio de Janeiro,Brazil |
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| Abstract: | In a previous work (Siqueira et al. 2010b) the preparation of cellulosic nanoparticles from sisal fibers using different processing routes, viz. a combination of
mechanical shearing, acid and enzymatic hydrolysis was reported. It was shown that the pre-enzymatic hydrolysis treatment
of bleached sisal pulp helps the preparation of well individualized rod-like nanocrystals. An amorphous polymer (natural rubber—NR)
was chosen as model matrix to investigate the effect of these nanoparticles on the thermo-mechanical properties of nanocomposites.
Both tensile tests and dynamic mechanical analyses showed improved stiffness for all nanocomposites. The enzymatic treatment
allowed production of a huge range of cellulosic nanoparticles which provided completely different mechanical properties to
NR matrix. |
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