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.

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.

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

Enhanced Thermal Stability and UV-Shielding Properties of Poly(vinyl alcohol) Based on Esculetin

2017 ◽  
Vol 121 (5) ◽  
pp. 1148-1157 ◽  
Author(s):  
Yang Wang ◽  
Chennong Xiang ◽  
Ting Li ◽  
Piming Ma ◽  
Huiyu Bai ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Uv Shielding ◽  
Shielding Properties

Biodegradable Oph-POSS/Poly(Lactic Acid) Nanocomposites: Morphology, Thermal Stability and Degradation Property

2015 ◽  
Vol 1120-1121 ◽  
pp. 352-356 ◽  
Author(s):  
Jie Sun ◽  
Qiang Qiang Zhao ◽  
Zheng Yan Cao ◽  
Hai Ning Lv ◽  
Cheng Qun Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Degradation Mechanism ◽  
Poly Lactic Acid ◽  
Surface Erosion ◽  
Solution Casting ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Biodegradation Rate ◽  
Casting Method ◽  
Mass Fractions ◽  
Solution Casting Method

The purpose of this work was to produce nanocomposites of polylactic acid with oph-POSS (octaphenyl-Polyhedral Oligomeric Silsesquioxanes)-based biodegradable polyester and study morphology, thermal stability and degradation property. Oph-POSS was synthesized via limited-hydrolytic condensation of phenyl trimethoxysilane catalyzed by tetramethylammonium hydroxide. By adding different mass fractions of oph-POSS into the PLA matrix, oph-POSS/PLA nanocomposites were successfully prepared by the solution casting method using chloroform as solvent. SEM(scanning electron microscopy) observations indicated that oph-POSS were homogeneously dispersed in the PLA matrix. The biodegradation rate of oph-POSS/PLA composites was higher than that of neat PLA, moreover, the degradations of neat PLA and oph-POSS/PLA composites underwent the surface erosion mechanism. It was found that the existence of oph-POSS enhanced thermal stability slightly of nanocomposites relative to neat PLA; however, the thermal degradation mechanism of PLA remained unchanged.

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