Cellulose nanocrystals/polyurethane nanocomposites. Study from the viewpoint of microphase separated structure

Rueda, Lorena; Saralegui, Ainara; d’Arlas, Borja Fernández; Zhou, Qi; Berglund, Lars A.; Corcuera, María Ángeles; Mondragón, Iñaki; Eceiza, Arantxa

doi:10.1016/j.carbpol.2012.09.093

Cited by 132 publications

(94 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This suggests that incorporating CNC/ ZnO-AgNPs into the PVA/Cs matrix results in strong interactions between the filler and the matrix, and consequently restricts the motion of the matrix and promotes rigidity. 28 Furthermore, increased crystallinity, which was confirmed by X-ray diffraction analysis, can also enhance mechanical properties. 29 Further addition of CNC/ZnO-AgNPs decreased the tensile strength and modulus, but this still remained higher than that of the original PVA/Cs film.…”

Section: X-ray Diffractionmentioning

confidence: 85%

Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

Azizi¹,

Ahmad²,

Hussein³

et al. 2014

IJN

View full text Add to dashboard Cite

A series of novel bionanocomposites were cast using different contents of zinc oxide-silver nanoparticles (ZnO-AgNPs) stabilized by cellulose nanocrystals (CNC) as multifunctional nanosized fillers in poly(vinyl alcohol)/chitosan (PVA/Cs) matrices. The morphological structure, mechanical properties, ultraviolet-visible absorption, and antimicrobial properties of the prepared films were investigated as a function of their CNC/ZnO-AgNP content and compared with PVA/chitosan/CNC bionanocomposite films. X-ray diffraction and field emission scanning electron microscopic analyses showed that the CNC/ZnO-AgNPs were homogeneously dispersed in the PVA/Cs matrix and the crystallinity increased with increasing nanosized filler content. Compared with pure PVA/Cs, the tensile strength and modulus in the films increased from 0.055 to 0.205 GPa and from 0.395 to 1.20 GPa, respectively. Ultraviolet and visible light can be efficiently absorbed by incorporating ZnO-AgNPs into a PVA/Cs matrix, suggesting that these bionanocomposite films show good visibility and ultraviolet-shielding effects. The bionanocomposite films had excellent antimicrobial properties, killing both Gram-negative Salmonella choleraesuis and Gram-positive Staphylococcus aureus . The enhanced physical properties achieved by incorporating CNC/ZnO-AgNPs could be beneficial in various applications.

show abstract

Section: X-ray Diffractionmentioning

confidence: 85%

Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

Azizi¹,

Ahmad²,

Hussein³

et al. 2014

IJN

View full text Add to dashboard Cite

show abstract

“…AFM tapping mode has been used for polymeric surfaces information with nanoscale resolution [9][10][11] . High-resolution surface results are obtained through this mode of analysis, since the images provide height (relief surface) and phase (combination of sample and AFM-probe characteristics) [12,13] .…”

Section: De Sousa F D B; Scuracchio C H -The Use Of Atomic Formentioning

confidence: 99%

“…The main factors of mechanical energy dissipation of the tip and consequent phase change are the viscoelastic, adhesive and topographical properties of the region being examined. In addition, it allows to obtain new information about the polymers surface such as tribological data [3] , local contaminants [6] , morphology [17, , distribution of phases in blends and composites [41][42][43][44][45][46][47] , compatibility between the phases of polymer blends and interaction between nanocomposites phases [48][49][50][51][52][53][54] , polymeric chains conformation [7,38] , cross-link density [55][56][57] , dispersion of fillers in the polymeric matrix [10,12,16,48,49,[58][59][60][61][62][63][64][65][66][67][68][69] , among other applications.…”

Section: De Sousa F D B; Scuracchio C H -The Use Of Atomic Formentioning

confidence: 99%

The use of atomic force microscopy as an important technique to analyze the dispersion of nanometric fillers and morphology in nanocomposites and polymer blends based on elastomers

Sousa

Scuracchio

2014

Polímeros

View full text Add to dashboard Cite

AFM has been recognized as one of the most powerful tools for the analysis of surface morphologies because it creates three-dimensional images at angstrom and nano scale. This technique has been exhaustively used in the analyses of dispersion of nanometric components in nanocomposites and in polymer blends, because of the easiness of sample preparation and lower equipment maintenance costs compared to electron microscopy. In this review, contributions using AFM are described, with emphasis on the dispersion of nanofillers in polymeric matrices. It is aimed to show the importance of technical analysis for nanocomposites and polymer blends based on elastomers.

show abstract

“…A small amount of well-dispersed NCs improved the stiffness of SMP dramatically, with no obvious decrease of shape-memory properties. Rueda et al [91] mixed CNCs with SMPU in DMF and obtained films with a thickness of 0.1 mm by solvent casting procedure followed by a pressure-temperature cycle at 80°C. It was found that CNCs were effectively dispersed in the segmented SMPU matrix due to the favorable matrix-nanocrystals interactions through hydrogen bonding, with an enhancement of stiffness and stability versus temperature of the nanocomposites.…”

Section: Processing Methods Of Nc/smp Nanocompositesmentioning

confidence: 99%

Nanocellulose and Its Application for Shape-Memory Materials

Fu¹,

Tian²

2015

Advanced Structured Materials

View full text Add to dashboard Cite

Nanocellulose (NC) has been attracting a great deal of interest as promising candidates for bionanocomposite due to their appealing intrinsic properties, such as low density, high surface area, and mechanical strength. In view of countless publications on nanocellulose composites already, this chapter concentrates on application of nanocellulose for reinforcing shape-memory composites. Shape-memory composites enable high-recovery stress levels and various functions due to their different components. The shape-memory behavior is also dependent on the size, shape, and concentration of the fillers. The effect of nanocellulose in these composites is determined by different shape-memory switches and interactions between nanocellulose and matrices. A challenge of using NC in shape-memory composites is the lack of compatibility between hydrophobic matrices and hydrophilic NCs. Various chemical modification methods have been explored to address this hurdle. In this chapter, we summarized the effect of nanocellulose on the deformation mechanism of shape-memory materials, with a particular focus on thermo-and water-sensitive switches. The application of shape-memory composites based on nanocellulose is also discussed.

show abstract

Cellulose nanocrystals/polyurethane nanocomposites. Study from the viewpoint of microphase separated structure

Cited by 132 publications

References 37 publications

Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

The use of atomic force microscopy as an important technique to analyze the dispersion of nanometric fillers and morphology in nanocomposites and polymer blends based on elastomers

Nanocellulose and Its Application for Shape-Memory Materials

Contact Info

Product

Resources

About