Unsaturated Polyester Nanocomposites modified with fibrillated cellulose and PEO-b-PPO-b-PEO block copolymer

Builes, Daniel H.; Labidi, Jalel; Eceiza, Arantxa; Mondragón, Iñaki; Tercjak, Agnieszka

doi:10.1016/j.compscitech.2013.09.015

Cited by 30 publications

(18 citation statements)

References 27 publications

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“…K Q increases from 2.5 MPa.m 0.5 for neat UP to 6.4 MPa.m 0.5 for the 30% CNF/UP. Builes et al studied fracture toughness for CNF/UP composites at 1 vol% of CNF and reported only marginal increase [14]. Note that thin specimens do not meet conditions of plain strain [32].…”

Section: Apparent Fracture Toughnessmentioning

confidence: 89%

“…More recently, Kargarzadeh et al used silane compounds to modify cellulose nanocrystals and studied UP composites with up to 6 wt% of nanocrystals [13]. Builes et al used block copolymers to disperse 1 wt% of CNF in UP resin, and observed marginal increase in fracture toughness [14]. Since coupling agents represent a significant cost when used with high specific surface area nanofibers, no coupling agents are used in the present study.…”

Section: Introductionmentioning

confidence: 95%

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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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Section: Apparent Fracture Toughnessmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 95%

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

Ansari

Skrifvars

Berglund

2015

Composites Science and Technology

View full text Add to dashboard Cite

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“…5d). As reported by Builes [21], the effective dispersion of microfibrillated cellulose was obtained with the aid of a block copolymer.…”

Section: Morphology and Dispersion Of Compositesmentioning

confidence: 97%

Effect of clay and PEO-PPO-PEO block copolymer on the microstructure and properties of cyanate ester/epoxy composite

Huo

et al. 2015

Composites Part A: Applied Science and Manufacturing

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“…The MFC microparticles might origin from a raw material as well as arise due to agglomeration of nanofibrils during drying or due to hydrogen bonding in the water suspension. Interestingly, Builes and co-workers demonstrated by that by adding an effective surfactant to the water suspension of microfibrillated cellulose the particles diameters, determined by DLS method, were significantly reduced (Builes et al 2013). The authors explained this phenomenon by surfactant-MFC interactions that prevented formation of larger agglomerates in water environment.…”

Section: Analysis By Sem and Dlsmentioning

confidence: 97%

Biocomposites of polyamide 4.10 and surface modified microfibrillated cellulose (MFC): influence of processing parameters on structure and thermomechanical properties

2015

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Novel bio-polyamides obtained from renewable resources, e.g. PA4.10, are considered nowadays as promising 'green' engineering materials consisting of building blocks derived from castor oil. In this work the composites of heterogeneously acetylated microfibrillated cellulose (MFC) and biopolyamide 4.10 have been prepared by melt blending. Thermoplastic processing of PA4.10/MFC composites was possible in a narrow temperature window due to significant improvement of thermal stability of acetylated MFC as compared to raw MFC. The increase of thermooxidative stability of filler was due to removal of non-cellulosic components from the raw material and introduction of acetic moieties that had additional slight stabilizing effect on MFC. Moreover, the modified MFC showed significant changes in morphology that favoured its dispersibility in viscous polymer melt. Combined treatment of MFC by chemical agents, which caused partial hydrolysis of amorphous regions, and physical disintegration by ultrasonic waves resulted in formation of fibrous material with low degree of entanglement and submicron or nanometric diameters. In the tested range of screw speeds it was found that at screw speed of 100 rpm the shearing forces were sufficient for dispersing MFC agglomerates and the melt pressure secured evacuation of gases introduced to plasticizing system of extruder with MFC-Ac aerogel. The dynamic mechanical properties of obtained (nano)-composites were influenced by both mechanical strengthening of rigid cellulose micro and nanofibers as well as susceptibility of biopolymers towards oxidation and thermomechanical degradation during processing.

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Unsaturated Polyester Nanocomposites modified with fibrillated cellulose and PEO-b-PPO-b-PEO block copolymer

Cited by 30 publications

References 27 publications

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

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

Effect of clay and PEO-PPO-PEO block copolymer on the microstructure and properties of cyanate ester/epoxy composite

Biocomposites of polyamide 4.10 and surface modified microfibrillated cellulose (MFC): influence of processing parameters on structure and thermomechanical properties

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