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

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.

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

Materials Focus ◽

10.1166/mat.2013.1098 ◽

2013 ◽

Vol 2 (5) ◽

pp. 329-334 ◽

Cited By ~ 1

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

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

RSC Advances ◽

10.1039/c8ra07143h ◽

2018 ◽

Vol 8 (67) ◽

pp. 38681-38688 ◽

Cited By ~ 13

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.

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Polyarylene ether nitrile and boron nitride composites: coating with sulfonated polyarylene ether nitrile

e-Polymers ◽

10.1515/epoly-2019-0009 ◽

2019 ◽

Vol 19 (1) ◽

pp. 70-78 ◽

Cited By ~ 6

Author(s):

Renbo Wei ◽

Qian Xiao ◽

Chenhao Zhan ◽

Yong You ◽

Xuefei Zhou ◽

...

Keyword(s):

Thermal Conductivity ◽

Boron Nitride ◽

Composite Films ◽

Solution Casting ◽

Casting Method ◽

Polyarylene Ether Nitrile ◽

Arylene Ether ◽

Ultrasonic Technology ◽

Solution Casting Method ◽

Sulfonated Poly

AbstractBoron nitride (BN) coated with sulfonated poly-arylene ether nitrile (SPEN) (BN@SPEN) was used as additive to enhance the thermal conductivity of polyarylene ether nitrile. BN@SPEN was prepared by coating BN micro-platelets with SPEN through ultrasonic technology combined with the post-treatment bonding process. The prepared BN@SPEN was characterized by FTIR, TGA, SEM and TEM, which confirmed the successful coating of BN micro-platelets. The obtained BN@SPEN was introduced into the PEN matrix to prepare composite films by a solution casting method. The compatibility between BN and PEN matrix was studied by using SEM observation and rheology measurement. Furthermore, thermal conductivity of BN@SPEN/PEN films were carefully characterized. Thermal conductivity of BN@SPEN/PEN films was increased to 0.69 W/(m⋅K) at 20 wt% content of BN@SPEN, having 138% increment comparing with pure PEN.

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Crystallization and Dielectric Properties of MWCNT /Poly(1-Butene) Composite Films by a Solution Casting Method

Materials ◽

10.3390/ma13030755 ◽

2020 ◽

Vol 13 (3) ◽

pp. 755

Author(s):

Lingfei Li ◽

Qiu Sun ◽

Xiangqun Chen ◽

Yongjun Xu ◽

Zhaohua Jiang

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Dielectric Loss ◽

Breakdown Strength ◽

Composite Films ◽

Conductive Filler ◽

Interfacial Polarization ◽

Solution Casting ◽

Casting Method ◽

Solution Casting Method

In this work, poly(1-butene) (PB-1) composite films with multi-walled carbon nanotubes (MWCNT) were prepared by a solution casting method. The relationship between the dielectric properties and the crystal transformation process of the films was investigated. It was indicated that there were two crystal forms of I and II of PB-1 during the solution crystallization process. With the prolongation of the phase transition time, form II was converted into form I. The addition of the conductive filler (MWCNT) accelerated the rate of phase transformation and changed the nucleation mode of PB-1. The presence of crystal form I in the system increased the breakdown strength and the dielectric constant of the films and reduced the dielectric loss, with better stability. In addition, the dielectric constant and the dielectric loss of the MWCNT/PB-1 composite films increased with the addition of MWCNT, due to the interfacial polarization between MWCNT and PB-1 matrix. When the mass fraction of the MWCNT was 1.0%, the composite film had a dielectric constant of 43.9 at 25 °C and 103 Hz, which was 20 times that of the original film.

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Structural characteristics and electrochemical properties of sulfonated polyimide clay-based composite fabricated by a solution casting method

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-019-02273-1 ◽

2019 ◽

Vol 30 (21) ◽

pp. 19164-19172 ◽

Cited By ~ 4

Author(s):

Nisar Ali ◽

Farman Ali ◽

Shaukat Saeed ◽

Syed Sakhawat Shah ◽

Muhammad Bilal

Keyword(s):

Thin Films ◽

Impedance Spectroscopy ◽

Proton Nuclear Magnetic Resonance ◽

Resonance Spectroscopy ◽

Solution Casting ◽

Casting Method ◽

Energy Devices ◽

H Nmr ◽

Sulfonated Polyimide ◽

Solution Casting Method

Abstract Herein, the electrochemical and structural properties of sulfonated polyimide (SPI) clay-based composite films have been investigated. SPI reinforced with grafted sonicated clay (GSC) was fabricated via a solution casting method in the form of thin films. The as-synthesized thin films were light brown, tough, flexible and transparent. The thickness of the films were 0.109 mm and 0.056 for pristine SPI and GSC-SPI, respectively. The fabricated composite was fully investigated via Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance spectroscopy (1H NMR), carbon (13C) NMR and impedance spectroscopy. The completion of the proton exchange reaction was confirmed by 1H NMR. The electrical properties of the SPI-clay based composite film were investigated by impedance spectroscopy. The conductivity was measured in a wide frequency range from room temperature to 363 K by applying an ac signal of 0.5 V. The appearance of two semicircular arcs at low and high frequency shows two conduction mechanisms with different relaxation times at the exterior and interior of the system. Bode plot also confirms the presence of two electro-active regions. The shift in the position of tanδ peaks to lower frequency region with increasing temperature shows that these relaxations are thermally deactivated. The ac conductivity of the system increased from 6.02E−10 for neat SPI to 6.61E−6 Ω−1 cm−1 for SPI-GSC composite. In conclusion, these layered silicates based conductive films have the potential to act as a polyelectrolyte membrane for fuel cell energy devices.

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Dielectric Properties of CCTO/PVDF Composite Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.816-817.276 ◽

2013 ◽

Vol 816-817 ◽

pp. 276-279 ◽

Cited By ~ 4

Author(s):

Fang Fang Wang ◽

Ya Jun Wang ◽

Zhi Bo Ren

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Composite Films ◽

Solution Casting ◽

Casting Method ◽

Impedance Analyzer ◽

Composite Models ◽

Solution Casting Method ◽

Pvdf Matrix ◽

Ccto Powder

To meet the requirement of microelectronic industry, ceramic/polymer composite films made of CaCu3Ti4O12(CCTO) powder as filler and PVDF copolymer as matrix were prepared by solution casting method. The dielectric properties (DP) and morphology of the films were studied by impedance analyzer and scanning electron microscope (SEM) respectively. The dielectric constant could reach 23.96 and loss 0.1082 when mass fraction of CCTO is 50% at 100 Hz. SEM results show that CCTO particles dispersed well in the PVDF matrix. At last, three composite models were used to predict the dielectric constant of the composite films and it is proved that Yamada model fits the experimental data well.

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Preparations and characterizations of poly-o-toluidine/multiwalled carbon nanotubes/Sn(iv) tungstate composite ion exchange thin films and their application as a Pb(ii) selective electrode

RSC Advances ◽

10.1039/c4ra01594k ◽

2014 ◽

Vol 4 (45) ◽

pp. 23456-23463 ◽

Cited By ~ 9

Author(s):

Asif Ali Khan ◽

Shakeeba Shaheen

Keyword(s):

Thin Films ◽

Carbon Nanotubes ◽

Ion Exchange ◽

Multiwalled Carbon Nanotubes ◽

Solution Casting ◽

Casting Method ◽

Selective Electrode ◽

Multiwalled Carbon ◽

Solution Casting Method

Poly-o-toluidine (POT), poly-o-toluidine (POT)/multiwalled carbon nanotubes (MWCNTs), and poly-o-toluidine (POT)/multiwalled carbon nanotubes (MWCNTs)/Sn(iv) tungstate (ST) thin films were prepared by a solution casting method using polystyrene as a binder.

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