Effect of TiO2 Nanoparticles on Tensile and Photodegradation Behavior of Biopolymer Films Based on Poly(Butylene Succinate)

2013 ◽  
Vol 376 ◽  
pp. 89-92 ◽  
Author(s):  
Achanai Buasri ◽  
Nattawut Chaiyut ◽  
Vorrada Loryuenyong ◽  
Metta Worachat ◽  
Rapeepan Kanchanapradit ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Titanium Dioxide Nanoparticles ◽  
Composite Films ◽  
Tensile Modulus ◽  
Nanocomposite Films ◽  
Butylene Succinate ◽  
Uniform Dispersion ◽  
Wide Range ◽  
The Matrix ◽  
Evaporation Technique

Tensile and photodegradation behavior of poly (butylene succinate)/titanium dioxide nanoparticles (PBS/TiO2) composite films were investigated over a range of filler content 0-10 wt%. The surface of TiO2 nanoparticles was treated using propionic acid (C3H6O2) and n-hexylamine (C6H15N) order to disperse them into the bipolymer matrices. The nanocomposite materials were prepared by solvent evaporation technique and compression molding machine. All samples with a wide range of filler addition exhibit the translucency. The surface morphology showed that a uniform dispersion of filler in the matrix existed when the nanoparticles content was less than 5 wt%. The results indicated that the percentage of weight loss of the nanocomposite films was higher than the neat PBS owing to UVA and UVC irradiation. Functionalized TiO2 nanoparticles existing on the surface area suppressed photodegradation of the inner and backside of film specimens. The biopolymer films can easily be degraded by photocatalytic oxidation of TiO2 under UV irradiation. The introduction of modified TiO2 into PBS matrix improved the tensile modulus of the nanocomposites.

Effect of Titanium Dioxide Nanoparticles on Mechanical and Thermal Properties of Poly(Lactic Acid) and Poly(Butylene Succinate) Blends

2014 ◽  
Vol 96 ◽  
pp. 33-38 ◽  
Author(s):  
Achanai Buasri ◽  
Gridtapas Buranasing ◽  
Ratchanon Piemjaiswang ◽  
Satit Yousatit ◽  
Vorrada Loryuenyong
Keyword(s):  
Titanium Dioxide ◽  
Lactic Acid ◽  
Thermal Properties ◽  
Titanium Dioxide Nanoparticles ◽  
Poly Lactic Acid ◽  
Mechanical And Thermal Properties ◽  
Butylene Succinate ◽  
Uniform Dispersion ◽  
Wide Range ◽  
The Matrix

Poly (lactic acid) (PLA) blended with poly (butylene succinate) (PBS) were prepared by using twin screw extruder and injection molding machine at various contents of PBS from 0-15 wt%. The surface of titanium dioxide (TiO2) nanoparticles was treated using aminopropyl trimethoxy silane (ATS) order to disperse them into the biopolymer blends. The mechanical and thermal properties of PLA/PBS/TiO2 nanocomposites were investigated over a range of filler content 0-5 wt%. All samples with a wide range of TiO2 addition exhibit the translucency. The surface morphology showed that the addition of PBS at 10 wt% was miscible with PLA while the other contents of PBS exhibited phase separation in the blends. Additionally, a uniform dispersion of filler in the matrix existed when the nanoparticles content was less than 3 wt%. The surface treated nanoparticles played an important role in mechanical and thermal properties of the nanocomposites because of its well dispersion and strong interfacial interaction between the nanoparticles and PLA/PBS matrix.

scholarly journals Preparation of ZnO-Zn2TiO4Sol Composite Films and Its Photocatalytic Activities

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Xiujuan Qin ◽  
Li Cui ◽  
Guangjie Shao
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Oxidation ◽  
Spectral Response ◽  
Sol Gel ◽  
Composite Films ◽  
Visible Region ◽  
Performance Testing ◽  
Structure Characterization ◽  
Semiconductor Oxides ◽  
Wide Range

Ti-doped ZnO sol-composite films were prepared on the glass substrate by the two-step sol-gel technique. X-ray diffraction, Uv-Vis spectrophotometer, and FS spectrum of composite films were used to help make structure characterization and optical performance testing. The results showed that the composite was a mixture of ZnO + Zn2TiO4. Because of synergistic effect of both semiconductor oxides, composite films had a wide range of spectral response in the visible region, and the absorption band edge was about 510 nm, and the Green Belt of composite films luminous significantly enhanced. Photocatalytic oxidation experiments showed that using the composite films treatment (16.5 ml, l0 mg/L methyl orange aqueous solution)/cm2, the decolorization rate of methyl-orange was 90% after 3 hours irradiation.

scholarly journals Structure and Physical Properties of Polymer Composite Films Doped with Fullerene Nanoparticles

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
R. M. Ahmed ◽  
S. M. El-Bashir
Keyword(s):  
Composite Films ◽  
Spectroscopic Properties ◽  
Polymer Matrices ◽  
Nanocomposite Films ◽  
Medical Community ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Uniform Dispersion ◽  
Fullerene Nanoparticles

FullereneC60has stimulated intense interest for scientific, industrial, and medical community because of its unique structure and properties. In the present study we prepared fullerene-doped nanocomposite films based on PMMA, PVAc, and PMMA/PVAc blend. Observations made by transmission electron microscope (TEM) showed the uniform dispersion ofC60nanoparticles in the polymer matrices. Also, X-ray diffraction measurements indicated thatC60has a tendency to form crystallites in the polymer matrices. In addition, the concentration effect of fullereneC60was investigated using optical absorption and photoluminescence spectroscopy. The spectroscopic properties of such films recommended their application in photonics and solar energy conversion.

Poly (vinyl alcohol)/nano-diamond composite films and hydrogels prepared by gamma ray

2018 ◽  
Vol 38 (9) ◽  
pp. 857-862
Author(s):  
Masoud Frounchi ◽  
Susan Dadbin ◽  
Sara Haddadi
Keyword(s):  
Water Content ◽  
Nucleus Pulposus ◽  
Vinyl Alcohol ◽  
Gamma Ray ◽  
Composite Films ◽  
Tensile Modulus ◽  
Nanocomposite Films ◽  
Elastic Behavior ◽  
Poly Vinyl Alcohol ◽  
Prosthetic Material

Abstract Poly (vinyl alcohol) and nano-diamond, PVA/ND, hydrogels were prepared and assessed as prosthetic material suitable for replacement of the nucleus pulposus. The hydrogels were prepared by gamma irradiation at various doses (15 kGy, 25 kGy, 35 kGy, 45 kGy) and at various ND concentrations ranging from 0.25 wt.% to 3 wt.%. Extent of gelation, equilibrium water content, and viscoelastic properties of swelled hydrogels at definite water contents were measured and examined as a function of ND concentration as well as gamma dose. According to viscoelastic measurements, the strength of hydrogels increased considerably over that of pure PVA at a low concentration of ND. By increasing irradiation dose, gel percent and strength of hydrogels increased. Hydrogel water content was in a range of 80 wt.% to 90 wt.% similar to that of natural nucleus pulposus. The G″ values of hydrogels were much smaller than G′ values indicating elastic behavior. Also PVA/ND nanocomposite films were prepared at various ND concentrations by solution casting. The ND particles were uniformly distributed within PVA films. Tensile modulus and strength of the films increased over pure PVA.

Particle Size Effect on the Corona Resistant Properties of PI/TiO2 Composite Films

2014 ◽  
Vol 981 ◽  
pp. 914-917
Author(s):  
Guang You Li ◽  
Jing Hua Yin ◽  
Lei Yao ◽  
Xing Zhao
Keyword(s):  
Particle Size ◽  
In Situ Polymerization ◽  
Composite Films ◽  
Particle Size Effect ◽  
Interface Layer ◽  
Nanocomposite Films ◽  
Particle Sizes ◽  
Small Particles ◽  
The Matrix

Polyimide-based (PI) nanocomposites possess excellent electrical and thermal performance, widely used in inverter motor. In the paper using different particle sizes made polyimide/titania (PI/TiO2) nanocomposite films in situ polymerization, including 20nm A series and 50nm B series. The results shows that A series have a larger specific surface, combination of the film and matrix is closer without affecting the imidization of PI, and there is a clear interface layer and the structure is more stable. According to the time of corona-resistant A Series films is significantly longer than B Series films, especially the A series films with 15% of which corona-resistant time is 15h, five times than the pure PI. By both SAXS and XRD particle size in the matrix can be calculated, proving small particles can be better combination of the matrix of PI, increasing the number of traps, more effectively cutting off charge corrosion and making corona resistance greater performance.

scholarly journals Polyamide 11/Poly(butylene succinate) Bio-Based Polymer Blends

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2833 ◽  
Author(s):  
Maria Laura Di Lorenzo ◽  
Alessandra Longo ◽  
René Androsch
Keyword(s):  
Renewable Resources ◽  
Carbonyl Groups ◽  
Glass Transitions ◽  
Butylene Succinate ◽  
Binary Blends ◽  
Polyamide 11 ◽  
Uniform Dispersion ◽  
The Matrix ◽  
Matrix Morphology

The manuscript details the preparation and characterization of binary blends of polyamide 11 (PA 11) and poly(butylene succinate) (PBS), with PA 11 as the major component. The blends are fully bio-based, since both components are produced from renewable resources. In addition, PBS is also biodegradable and compostable, contrarily to PA 11. In the analyzed composition range (up to 40 m% PBS), the two polymers are not miscible, and the blends display two separate glass transitions. The PA 11/PBS blends exhibit a droplet-matrix morphology, with uniform dispersion within the matrix, and some interfacial adhesion between the matrix and the dispersed droplets. Infrared spectroscopy indicates the possible interaction between the hydrogens of the amide groups of PA 11 chains and the carbonyl groups of PBS, which provides the compatibilization of the components. The analyzed blends show mechanical properties that are comparable to neat PA 11, with the benefit of reduced material costs attained by addition of biodegradable PBS.

Polyimide/Polyimide Molecular Composite Films: Difference between Reactive Oligoimide and Reactive Polyimide as the Matrix Component

1998 ◽  
Vol 10 (1) ◽  
pp. 111-120 ◽  
Author(s):  
Tsutomu Takeichi ◽  
Kohji Nakajima ◽  
Min Zuo ◽  
Rikio Yokota
Keyword(s):  
Composite Films ◽  
Tensile Modulus ◽  
High Glass Transition Temperature ◽  
Matrix Component ◽  
Thermal Imidization ◽  
The Matrix ◽  
Matrix Components ◽  
Biphenyltetracarboxylic Dianhydride ◽  
Internal Acetylene ◽  
Very High

Polyimide/polyimide molecular composite (MC) films were prepared by blending precursor solutions of a rigid polyimide and a reactive oligoimide or a reactive polyimide that contains acetylene units in the backbone in a 7:3 ratio, followed by casting, drying and thermal imidization at 300 °C. 3, 3′, 4, 4′-Biphenyltetracarboxylic dianhydride (BPDA), pyromellitic dianhydride (PMDA), p-phenylenediamine (PDA), oxydianiline (ODA) and 3, 3′-diaminodiphenylacetylene ( m-intA) were used as acid dianhydride and diamine monomers for the preparation of polyimide. The rigid components were prepared from PMDA or BPDA and PDA. The matrix components were prepared from PMDA or BPDA and ODA or m-intA. The polyimide/polyimide MCs have exotherm on DSC due to the reaction of internal acetylene units, which indicates that the MC films are laminate processable. Tensile measurements revealed that the tensile modulus of the MCs utilizing reactive oligoimides is 20–30% higher than that of the MCs utilizing reactive polyimides. Viscoelastic analyses of the MC films showed that the crosslinking of the acetylene units gave polyimides that have a very high glass transition temperature.

Modification of Titanium Dioxide Embedded in the Bio-Composite Film for Photocatalytic Oxidation of Chlorinated Volatile Organic Compound

2014 ◽  
Vol 894 ◽  
pp. 37-42 ◽  
Author(s):  
Chaisri Tharasawatpipat ◽  
Jittiporn Kruenate ◽  
Kowit Suwannahong ◽  
Torpong Kreetachat
Keyword(s):  
Titanium Dioxide ◽  
Stearic Acid ◽  
Composite Film ◽  
Photocatalytic Degradation ◽  
Photocatalytic Oxidation ◽  
Composite Films ◽  
Chlorinated Volatile Organic Compounds ◽  
Blown Film ◽  
Uniform Dispersion ◽  
Volatile Organic

This research aimed to apply the Blown Film Extrusion technique to synthesize the titanium dioxide (TiO2) bio-composite films incorporated on a thin film as a photocatalyst. The biopolymer materials have great recognition via their renewable and biodegradable characteristic and the green composite has been a new challenge path to replace traditional polymer composite. In this work, TiO2/Polybutylene succinate (PBS) bio-composite film was developed to be used as a supporter for determining the photocatalytic oxidation activity of the TiO2 on the chlorinated volatile organic compounds degradation. PBS is a synthetic biopolymer which has a reasonable mechanical strength. The modified-TiO2/PBS bio-composite films were studied to evaluate the degradation of dichloromethane. In order to improve the distribution of the developed photocatalyst, the TiO2 powders were modified by 0.05% mole of ethyl triethoxysilane (ETES) and stearic acid (SA), respectively. The 10% wt. TiO2/PBS bio-composite films with thickness of 30 μm were prepared by blown film technique. To evaluate the dispersion efficacy, the modified-TiO2/PBS bio-composite films were characterized by Scanning Electron microscopy (SEM). Photocatalytic degradation of dichloromethane in gas phase was determined using an annular closed system photoreactor. The obtained result which was corresponding to the absorption of TiO2/PBS bio composites film was investigated in a range of 300-400 nm via UV/VIS spectrophotometry. The energy band gap of TiO2, ethyl triethoxysilane-TiO2 and stearic acid-TiO2 bio-composite film was found to be 3.18, 3.21, and 3.26 eV, respectively. The SEM shows that the modified-TiO2 with both ETES and SA exhibit uniform dispersion, while the only TiO2 shows an evidence of agglomeration in the PBS matrix. For photocatalyst efficiency, the photocatalytic activity of modified-TiO2/PBS bio-composite film increased comparing to the TiO2/PBS bio-composite film. Moreover, the photocatalytic degradation of dichloromethane by ETES-TiO2/PBS bio-composite film yielded degradation efficiency of 47.0%, whereas SA-TiO2/PBS bio-composite film yielded the removal efficiency of 41.0% for detention time at 350 min.

Influence of ZnO nanoadditives on the structural characteristics and dielectric properties of PVA

2021 ◽  
Author(s):  
E. Abdeltwab ◽  
A. Atta
Keyword(s):  
Dielectric Properties ◽  
Structural Characteristics ◽  
Composite Films ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Energy Storage Devices ◽  
Scanning Calorimetry ◽  
Super Capacitor ◽  
Sem Images ◽  
Wide Range

In this study, different percentages of semiconducting zinc oxide nanoparticles (ZnONPs) are mixed with polyvinyl alcohol (PVA) to create flexible ZnO/PVA polymer nanocomposite films. The characteristics of the prepared films are investigated using differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The XRD pattern shows that the ZnO/PVA composite films were successfully synthesized; while the SEM images show that the ZnONPs are homogeneously dispersed in the PVA polymer chain. Moreover, the DSC indicates an improvement in the thermal stability behavior with increased of ZnONPs concentration. The electrical conductivity, dielectric properties, electric modulus behavior, and the energy density efficiency of the pristine PVA and ZnO/PVA composite films are determined using an LCR meter in the frequency range 102–106 Hz. The dielectric constant of the composite film increased from 0.185 for pristine PVA to 1.389 for 9%ZnO/PVA, and the conductivity is improved from [Formula: see text] S/cm to [Formula: see text] S/cm. This work would open the road for utilizing ZnO/PVA flexible nanocomposite films for wide range of applications such as batteries, super-capacitor and energy storage devices.

scholarly journals Structural evolution and dielectric properties of biaxially oriented polyethylene/multiwalled carbon nanotube composite films

RSC Advances ◽  
2021 ◽  
Vol 11 (61) ◽  
pp. 38829-38838
Author(s):  
Meihan Li ◽  
Guangsheng Shi ◽  
Qiang Feng ◽  
Jiang Li ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Dielectric Properties ◽  
Composite Films ◽  
Structural Evolution ◽  
Multiwalled Carbon ◽  
Low Dielectric ◽  
Uniform Dispersion ◽  
The Matrix ◽  
Carbon Nanotube Composite ◽  
Oriented Polyethylene

The more uniform dispersion of MWCNTs in the matrix was caused by the high biaxial drawing ratios. Trace amounts of fillers were added to maintain low dielectric loss while increasing the dielectric properties of the BOPE/MWCNT composite films.

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