Electrical Properties of Poly(vinyl alcohol)/Montmorillonite Composite Membranes by Solution Casting Method

2013 ◽  
Vol 2 (5) ◽  
pp. 329-334 ◽  
Author(s):  
Fang-Chang Tsai ◽  
Ning Ma ◽  
Tai-Chin Chiang ◽  
Jing-Jing Shi ◽  
Hung-Chen Chang ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Vinyl Alcohol ◽  
Composite Membranes ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Method ◽  
Solution Casting Method

scholarly journals FTIR spectroscopy characterization and critical comparison of poly(vinyl)alcohol and natural hydroxyapatite derived from fish bone composite for bone-scaffold

2021 ◽  
Vol 2120 (1) ◽  
pp. 012004
Author(s):  
May Teng Hooi ◽  
Siew Wei Phang ◽  
Hui Ying Yow ◽  
Edmund David ◽  
Ning Xin Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Vinyl Alcohol ◽  
Fish Bone ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
Solution Casting Method ◽  
Extrusion Method

Abstract This paper presents the interaction comparison of poly(vinyl) alcohol (PVA) with hydroxyapatite derived from Spanish Mackerel (SM) and Whitefin Wolf Herring (WWH) bones, in different processing method. PVA filament and solution casting method illustrated higher crystallinity in the FTIR graph as compared to the PVA pellet and filament extrusion method. Besides, minimal interactions between PVA with glycerol and HAp was observed as well. PVA pellet and solution casting method portrait higher interaction as compared to the PVA filament and extrusion method. As for the HAp of SM and WWH, WWH had higher crystallinity and better cell adhesion with a higher Ca/P ratio while SM had relatively better mechanical strength with Ca/P ratio near to stoichiometric value. The loading of HAp (0, 2.5, 5, 10, 20, 30%) does not affect interactions of PVA/HAp composite in FTIR, and thermal properties in TGA. However, it caused an increase in crystallinity at low HAp loading and decreased at higher loading of HAp above 10%. Upon addition of HAp, tensile strength increased and elongation at break decreased. As the loading of HAp increased, both mechanical properties decreased. Scaffold with WWH composite possessed lower tensile strength and higher elongation at break than SM composite. The result of mechanical properties corresponded to the SEM result. ANOVA analysis justified the effect of HAp variations and loading on the mechanical properties of the composite was prominent.

Gamma irradiation studies of composite thin films of poly vinyl alcohol and coumarin

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1554-1561 ◽  
Author(s):  
Feroz A. Mir ◽  
Adil Gani ◽  
K. Asokan
Keyword(s):  
Thin Films ◽  
Gamma Irradiation ◽  
Vinyl Alcohol ◽  
Composite Films ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Method ◽  
Composite Thin Films ◽  
Solution Casting Method

Composite films of imperatorin (a coumarin molecule) and poly vinyl alcohol (PVA) are prepared by a solution casting method.

scholarly journals Enhanced mechanical, thermal, and UV-shielding properties of poly(vinyl alcohol)/metal–organic framework nanocomposites

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38681-38688 ◽  
Author(s):  
Yibo Dai ◽  
Qun Tang ◽  
Ziang Zhang ◽  
Caili Yu ◽  
Heping Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Vinyl Alcohol ◽  
Metal Organic Framework ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Method ◽  
Uv Shielding ◽  
Metal Organic ◽  
Solution Casting Method ◽  
Shielding Properties

PVA/HKUST-1 nanocomposites prepared by a simple solution casting method displayed significantly enhanced thermal stability, mechanical and UV-shielding properties.

Effect of Nanosilicon Dioxide on Structure and Properties of Poly(Vinyl Alcohol)/ Sodium Carboxymethylcellulose Blending Film

2013 ◽  
Vol 779-780 ◽  
pp. 7-11
Author(s):  
Xiao Xue Zhang ◽  
Li Xing Dai
Keyword(s):  
Electron Microscopy ◽  
Tensile Strength ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Structure And Properties ◽  
Sodium Carboxymethylcellulose ◽  
Casting Method ◽  
Transmission Electron ◽  
Solution Casting Method ◽  
Structure Properties

Poly (vinyl alcohol) (PVA)/sodium carboxymethylcellulose (Na-CMC)/nanosilicon dioxide (nanoSiO2) films were prepared by solution casting method. The structure, properties and morphology of the films affected by nanoSiO2 were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and mechanical testing. With the increase of nanoSiO2 content from 0 to 2.3 wt%, tensile strength increased from 20.98 to 34.80 MPa, while further increase of nanoSiO2 decreased the tensile strength. FTIR spectroscopy of the films confirmed that Si-O-C bonds and hydrogen bonding were formed among PVA, Na-CMC and nanoSiO2, which was suggested to improve the tensile strength of the films.

scholarly journals Separation of Aqueous Isopropanol Through Chitosan/Poly (Vinyl Alcohol) Blended Membranes by Pervaporation

1970 ◽  
Vol 2 (2) ◽  
Author(s):  
S. H. Tan, A. L. Ahmad ◽  
M. G. Mohd. Nawawi and H. Hassan
Keyword(s):  
Separation Factor ◽  
Vinyl Alcohol ◽  
Operating Conditions ◽  
Poly Vinyl Alcohol ◽  
Feed Concentration ◽  
Casting Method ◽  
Blend Ratio ◽  
Solution Casting Method ◽  
Pervaporation Separation ◽  
Aqueous Isopropanol

Blend membranes consisting of chitosan/poly (vinyl alcohol) (CS/PVA) were prepared from a solution casting method and characterized via the pervaporation separation of isopropanol-water mixtures.  The solution of pure chitosan was blended with poly(vinyl alcohol) at different compositions. The miscibility of the blended polymers was determined.  Criteria for miscibility was based on the clarity of the blend and the transparency of the membrane obtained.  The effects of feed concentration and chitosan content in membrane on the permeation flux and separation factor were also investigated. For the dehydration of 90 wt.% of isopropanol-water mixtures the performance of the blend ratio of 30:70 (CS:PVA) exhibited the highest separation factor. It was shown that under the same operating conditions, the pervaporation separation index (PSI) for homogeneous membranes were higher than that of blended membranes for the entire feed concentrations.Key Words: Blend, Chitosan, Poly (vinyl alcohol), Miscibility, Pervaporation.

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