Foaming Poly(vinyl alcohol)/Microfibrillated Cellulose Composites with CO2 and Water as Co-blowing Agents

2014 ◽  
Vol 53 (30) ◽  
pp. 11962-11972 ◽  
Author(s):  
Na Zhao ◽  
Lun Howe Mark ◽  
Changwei Zhu ◽  
Chul B. Park ◽  
Qian Li ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Microfibrillated Cellulose ◽  
Poly Vinyl Alcohol ◽  
Blowing Agents ◽  
Cellulose Composites

scholarly journals Effect of Microfibrillated Cellulose on Microstructure and Properties of Poly(vinyl alcohol) Foams

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 813 ◽  
Author(s):  
Gennaro Gentile ◽  
Mariacristina Cocca ◽  
Roberto Avolio ◽  
Maria Errico ◽  
Maurizio Avella
Keyword(s):  
Vinyl Alcohol ◽  
Cell Shape ◽  
High Speed ◽  
Microfibrillated Cellulose ◽  
Poly Vinyl Alcohol ◽  
Infrared Analysis ◽  
Cellulose Content ◽  
Scanning Calorimetry ◽  
Hydrogen Bond Interaction ◽  
The Matrix

Poly(vinyl alcohol) foams, containing different amounts of microfibrillated cellulose, were prepared through an eco-friendly procedure based on high-speed mixing and freeze-drying. The effect of filler amount on cell shape and regularity was studied by scanning electron microscopy (SEM) and the evolution of the microstructure was assessed through dynamic cryo-SEM. Fourier Transformed Infrared Analysis and Differential Scanning Calorimetry measurements revealed the presence of hydrogen bond interaction among cellulosic filler and the matrix. The modulus and compression deflection of neat PVA were significantly improved by increasing the amount of microfibrillated cellulose content with respect to foams realised with pulp cellulose fibers.

Crack bridging modelling in Bioglass ® based scaffolds reinforced by poly-vinyl alcohol/microfibrillated cellulose composite coating

2017 ◽  
Vol 110 ◽  
pp. 16-28 ◽  
Author(s):  
Michal Kotoul ◽  
Petr Skalka ◽  
Oldřich Ševeček ◽  
Luca Bertolla ◽  
James Mertens ◽  
...  
Keyword(s):  
Composite Coating ◽  
Vinyl Alcohol ◽  
Microfibrillated Cellulose ◽  
Poly Vinyl Alcohol ◽  
Crack Bridging ◽  
Cellulose Composite

Effect of γ irradiation on poly(vinyl alcohol) and bacterial cellulose composites used as packaging materials

2013 ◽  
Vol 84 ◽  
pp. 200-204 ◽  
Author(s):  
Anicuta Stoica-Guzun ◽  
Marta Stroescu ◽  
Iuliana Jipa ◽  
Loredana Dobre ◽  
Traian Zaharescu
Keyword(s):  
Bacterial Cellulose ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Packaging Materials ◽  
Γ Irradiation ◽  
Cellulose Composites

Biodegradation of Poly(vinyl alcohol) and Bacterial Cellulose Composites by Aspergillus niger

2010 ◽  
Vol 19 (1) ◽  
pp. 69-79 ◽  
Author(s):  
Anicuta Stoica-Guzun ◽  
Luiza Jecu ◽  
Amalia Gheorghe ◽  
Iuliana Raut ◽  
Marta Stroescu ◽  
...  
Keyword(s):  
Aspergillus Niger ◽  
Bacterial Cellulose ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Cellulose Composites

Microfibrillated Cellulose Reinforced Poly(vinyl alcohol) Composites

2013 ◽  
Vol 747 ◽  
pp. 359-362 ◽  
Author(s):  
Supachok Tanpichai ◽  
William W. Sampson ◽  
Stephen J. Eichhorn
Keyword(s):  
Vinyl Alcohol ◽  
Tensile Deformation ◽  
Stress Transfer ◽  
Physical And Mechanical Properties ◽  
Microfibrillated Cellulose ◽  
Poly Vinyl Alcohol ◽  
Reinforced Composites ◽  
Casting Method ◽  
Bond Stretching ◽  
Lyocell Fibers

Microfibrillated cellulose (MFC) was successfully prepared from lyocell fibers using combined homogenization and sonication treatments. MFC fibrils with a mean diameter of ~365 nm were observed, after the lyocell fibers with diameters of ~10 μm were mechanically treated for 60 min. Poly (vinyl alcohol) (PVA) composites reinforced with MFC were then fabricated using a solvent casting method. Physical and mechanical properties of the MFC reinforced PVA composites were investigated. An increase of ~13 and ~34 % of tensile strength and Youngs modulus was observed for the 3 wt% MFC reinforced composites, compared to those of the pure PVA. Raman spectroscopy was also employed to study the deformation micromechanics of the MFC reinforced PVA composites. The position of the Raman peak initially located at 1095 cm-1, corresponding to the C-O ring stretching and C-O-C glycosidic bond stretching modes, was recorded. During tensile deformation, this peak was observed to shift towards a lower wavenumber position, indicating stress-transfer between the resin and the fibrils.

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