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Synthesis of SiO2/SnO2 nanofibers using TEMPO …

cellulose nanocrystals(CNCs), cellulose nanofibrils (CNFs) and bacterial cellulose (BC).

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Cellulose Nanofibers Prepared by TEMPO-Mediated …

The main aim of this study was to investigate the possibility of producing a nanocellulose composite with a non-water-soluble polymer matrix (Pebax). The authors report on the preparation of thermoplastic elastomer composites reinforced with cellulose nanofibers. Then, the effects of the cellulose nanofibers loadings and the compatibility between the cellulose nanofibers and Pebax matrix were evaluated by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and mechanical tests. The results indicated appropriate effects of nanocellulose for good interaction and close contact between the nanocellulose and polyamide phase of the Pebax polymer.

Preparation of Cellulose Nanofibers Reinforced Polyether-b-Amide Nanocomposite

FirstCNCs and CNFs are systematically compared in terms of their effects onthe mechanical properties, crystallization and failure behavior of thenanocomposites, which provides a guideline for the design of cellulosenanofiber reinforced composites.

Synthesis of cellulose nanofiber composites for …

Keywords: Thermoplastic elastomer; cellulose nanofiber; Nanocomposite; Pebax

Yousefi, H., Faezipour, M., Nishino, T., Shakeri, A., Ebrahimi, G. (2011). “All-cellulose composite and nanocomposite made from partially dissolved micro- and nanofibers of canola straw,” Polymer Journal 43, 559-564. DOI: 10.1038/pj.2011.31

Xu, X. X., Liu, F., Jiang, L., Zhu, T. Y., Haagenson, D., and Wiesenborn, D. P. (2013). “Cellulose nanocrystals vs. cellulose nanofibrils: a comparative study on their microstructures and effects as polymer reinforcing agents,” ACS Applied Materials & Interfaces 5(8), 2999-3009. DOI: 10.1021/am302624t

Cellulose nanofibers are devoted to advances in production, ..

Fig. 5. SEM of Pebax with 3% nanocellulose. Arrows show cellulose nanofibers (white dots)

The SEM images for the nanocomposite with 1% and 3% of nanocellulose (Figs. 4 and 5) indicated that the cellulose nanofibers (white dots) were dispersed homogeneously within the Pebax matrix. This could have been ascribed to a good interaction between the nanocellulose and polyamide phase of the Pebax matrix.

The morphology of the nanocomposite and dispersion of cellulose nanofiber into the Pebax matrix was investigated by SEM. Figures 3 through 6 show the cryogenically fractured surfaces of Pebax and the related nanocomposite reinforced with different amounts of cellulose nanofibers. Cellulose nanofibers appear as white dots during the SEM imaging. Cellulose nanofibers of almost uniform size were observed. The fractured surface of the Pebax matrix was smooth and uniform.

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  • 3.3 Synthesis of cellulose materials

    In situ synthesis of phosphate binding mesocellular siliceous foams impregnated with iron oxide nanoparticles.

  • Preparation of cellulose nanofibers reinforced polyether …

    SiO 2 /SnO 2 nanofibers were synthesized using templates of TEMPO-oxidized cellulose nanofibers (TOCN)

  • History of nanofiber production

    Stable dispersions of nanofibers are virtually unknown for synthetic polymers

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Dispersions of Aramid Nanofibers: A New Nanoscale …

The diameters of 30 cellulose nanofibers were calculated using a Digimizer (MedCalc Software Co.) on the phase micrograph of AFM (Fig 2). Based on the calculation, the average diameter of CNF obtained was 35±10 nm.

Nanocomposites: synthesis, structure, properties and …

The FTIR analysis confirmed the presence of Pebax and nanocellulose in nanocomposites and showed that the composition of Pebax could be affected by the content of cellulose nanofiber.

Journal of Nanoscience and Nanotechnology

However, the SEM image of the nanocomposite with 5% cellulose nanofibers showed agglomerated structures on the surface in comparison to the uniform surfaces of other nanocomposites (Fig. 6). This compact agglomeration of cellulose nanofibers showed that cellulose chains had become clumped together. This is been attributed to intermolecular hydrogen bonding and a strong hydrophilic interaction between the cellulosic chains (Bhatnagar and Sain 2005).

Colin Raston - Flinders University

The solvent exchange method has been used to change the water of nanocellulose suspension to benzyl alcohol by a series of centrifugation steps. The nanocellulose suspension was centrifuged at 10,000 rpm and 20 °C for 5 min, and the water was replaced with ethanol. This process was repeated 3 times. This procedure was applied again, and the ethanol was replaced with benzyl alcohol. This process was also repeated 3 times. Then, a different amount of Pebax and nanofibers with the benzyl alcohol base were mixed together, followed by mechanical stirring for 10 min at 60 °C to prepare a masterbatch. The masterbatches were poured onto petri dishes and oven-dried at 90 °C for approximately 3 days to evaporate the solvent.

Innovation Toronto - A daily scan of global research …

1. A new nanocomposite made of a bio-sourced thermoplastic elastomer matrix and cellulose nanofiber was prepared by compounding solution casting and melt blending process. The morphology, phase interactions, thermal, and mechanical behavior of the nanocomposites were analyzed using various tests.

A daily scan of global research and discovery ..

In this research the raw material was pure commercial cellulose fibers of softwood, purchased from Nano Novin Polymer Co. Cellulose nanofibers were prepared from long fiber α-cellulose pulp by a super-grinding procedure. At first, long fiber α-cellulose pulp was rinsed with distilled water 3 times and then placed in a 5% concentration of potassium hydroxide (KOH) solution for 1 h at 80 °C under mechanical stirring. After this alkaline treatment, α-cellulose suspension with a 1% concentration was prepared and then passed 3 times through the super-grinding disk machine (MKCA6-3; Masuko Sangyo Co., Ltd., Kawaguchi, Japan) to produce cellulose nanofibers. The super-grinding disk machine consisted of a static and a rotating grinder disk. The grinding stone was SiC and its diameter was 6 inches. The time and speed of grinding were 40 g/hour and 1800 rpm, respectively. The energy consumption of the grinder was 25 KWh/Kg and the nano-size fibers in gel form were achieved.

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