Novel nanocomposite concept based on cross-linking of hyperbranched polymers in reactive cellulose nanopaper templates

Henriksson, Marielle; Fogelström, Linda; Berglund, Lars A.; Johansson, Mats; Hult, Anders

doi:10.1016/j.compscitech.2010.09.006

Cited by 42 publications

(35 citation statements)

References 26 publications

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“…In each case, the tan δ peak could be fitted with two Gaussian peaks, with a low temperature peak centered at 65 to 70°C for all the nanocomposites, and a high temperature peak at roughly 110, 120, and 130°C with 60 vol % MPS‐modified, unmodified and CAN‐modified NFC respectively. This suggests the coexistence of two matrix phases: a bulk phase with a T α close to that of the resin, and an interphase associated with the NFC surface with reduced mobility and hence a higher T α .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the hydrophilic NFC is difficult to disperse in organic solvents, so that aggregation becomes even more problematic when preparing nanocomposites from water insoluble polymers. Henriksson et al demonstrated the potential of a wet impregnation route for preparing NFC nanocomposites with a hyperbranched polymer matrix . Ansari et al have subsequently used a similar template approach with solvent exchange and impregnation to obtain a highly homogeneous NFC dispersion in a thermoset epoxy matrix.…”

Section: Introductionmentioning

confidence: 99%

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UV‐cured cellulose nanofiber composites with moisture durable oxygen barrier properties

Galland

Leterrier

Nardi

et al. 2014

J of Applied Polymer Sci

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Nanocomposites based on 10 to 60 vol % cellulose nanofibers (NFC) in a photopolymerizable hyperbranched acrylate matrix were prepared. Unmodified NFC and NFC chemically modified with a silane coupling agent and with ceric ammonium nitrate for direct polymer grafting from the cellulose surface were used. A homogeneous dispersion of NFC in the matrix was obtained in each case, leading to a marked improvement in oxygen barrier (up to nine times) and thermomechanical properties (storage modulus increased up to seven times). The mechanisms involved in the permeability reduction were investigated, revealing non‐monotonic trends in the evolution of the solubility and diffusion coefficients with NFC content. Most significantly, the inherent moisture sensitivity of the oxygen permeability of the NFC was found to be drastically reduced when it was dispersed in the polymer matrix, particularly after chemical modification, underlining the promise of the present approach for the production of robust, high barrier organic films. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40604.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

UV‐cured cellulose nanofiber composites with moisture durable oxygen barrier properties

Galland

Leterrier

Nardi

et al. 2014

J of Applied Polymer Sci

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“…The resulting composites showed high optical transparency. Formaldehyde, epoxy (EP) and other resins for thermoset polymers have been used to prepare composites with CNF via similar network approach [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured biocomposites based on unsaturated polyester resin and a cellulose nanofiber network

Ansari

Skrifvars

Berglund

2015

Composites Science and Technology

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Biocomposites reinforced by natural plant fibers tend to be brittle, moisture sensitive and have limited strength. Wood cellulose nanofibers (CNF) were therefore used to reinforce an unsaturated polyester matrix (UP) without the need of coupling agents or CNF surface modification. The nanostructured CNF network reinforcement strongly improves modulus and strength of UP but also ductility and toughness. A template-based prepreg processing approach of industrial potential is adopted, which combines high CNF content (up to 45vol%) with nanoscale CNF dispersion. The CNF/UP composites are subjected to moisture sorption, dynamic thermal analysis, tensile tests at different humidities, fracture toughness tests and fractography. The glass transition temperature (T g ) increases substantially with CNF content.Modulus and strength of UP increase about 3 times at 45vol% CNF whereas ductility and apparent fracture toughness are doubled. Tensile properties at high humidity are compared with other biocomposites and interpreted based on differences in molecular interactions at the interface.

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“…The nanopapers are prepared by filtration of fiber suspensions. The wet nanofiber networks can be directly impregnated with the matrix solution 143,144 or dried, after which the dry nanopaper is immersed in the solution. 13, 18,145 Attempts have also been made to process CNFs by melt extrusion.…”

Section: Preparation Of Cellulose-reinforced Nanocompositesmentioning

confidence: 99%

Cellulose nanofillers for food packaging

Olsson

Fogelström

Martínez‐Sanz³

et al. 2011

Multifunctional and Nanoreinforced Polymers for Food Packaging

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Novel nanocomposite concept based on cross-linking of hyperbranched polymers in reactive cellulose nanopaper templates

Cited by 42 publications

References 26 publications

UV‐cured cellulose nanofiber composites with moisture durable oxygen barrier properties

UV‐cured cellulose nanofiber composites with moisture durable oxygen barrier properties

Nanostructured biocomposites based on unsaturated polyester resin and a cellulose nanofiber network

Cellulose nanofillers for food packaging

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