scholarly journals SYNTHESIS AND CHARACTERIZATION OF POLY (3HT - CO - TH) - PMMA POLYMER BLEND FILMS

2021 ◽  
Vol 9 (03) ◽  
pp. 401-408
Author(s):  
Imad Al - Deen Hussein Ali Al -Saidi ◽  
◽  
Hussein Falih Hussein ◽  
Numan Sleem Hashim ◽  
◽  
...  
Keyword(s):  
Polymer Blend ◽  
Optical Parameters ◽  
Blend Films ◽  
Optical Absorbance ◽  
Force Microscopy ◽  
Atomic Force ◽  
Percentage Weight ◽  
Ft Ir ◽  
Pmma Polymer

Poly(3 - Hexylthiophene - Co - Thiophene) copolymer was preparedby applying the additionpolymerization method.Then, the copolymer was added to the poly(methylmethacrylate) (PMMA) polymer to produce the poly(3HT- Co - Th) - PMMA polymer blend. In order to characterize the optical properties of the prepared polymer blend, poly (3HT- Co - Th) - PMMA polymer blend films were prepared at different percentage weight ratios of the copolymerusing the casting method.The surface structure of the prepared copolymer wasanalyzed by using the Fouriertransform infrared (FT-IR) spectroscopyas well as the atomic force microscopy (AFM)technique.The optical absorbance (A) and the transmittance (T) spectra of the prepared films were measured by using the UV-Vis spectrophotometer in the wavelengthrange300 nm - 800 nm. These optical spectra were used to determine the main optical parameters of the polymer blend films. Resultsindicated that the prepared poly(3HT- Co - Th) - PMMA polymer blend films can be promising candidates for photonic and optoelectronic applications.

scholarly journals PREPARATION AND OPTICAL PROPERTIES CHARACTERIZATION OF P3OT - PMMA POLYMER BLEND FILMS

2020 ◽  
Vol 7 (10) ◽  
pp. 238-246
Author(s):  
Imad Al - Deen Hussein Ali Al - Saidi ◽  
Hussein Falih Hussein ◽  
Arafat Hady Kareem
Keyword(s):  
Optical Properties ◽  
Polymer Blend ◽  
Optical Sensors ◽  
Weight Ratio ◽  
Optical Parameters ◽  
Blend Films ◽  
Optical Absorbance ◽  
Double Beam ◽  
Percentage Weight ◽  
Pmma Polymer

The optical properties of the Poly (3 - octylthiophene) (P3OT) – Poly (methyl methacrylate) (PMMA) polymer blend films at different percentage weight ratios of P3OT polymer were prepared using casting method. The optical absorbance and transmittance spectra of these films were measured in the wavelength range 300 – 1100 nm for different weight ratios of P3OT polymer using UV-Visible double - beam spectrophotometer. These optical spectra were used to determine the optical properties of the prepared polymer films. The main optical parameters of the polymer blend film, such as, reflectance (R), absorption coefficient (α), extinction coefficient (k), refractive index (n), real and imaginary parts of dielectric constant (εr and εi), and optical energy band gap (Eg), were determined. The effect of the weight ratio of P3OT polymer on these parameters was studied. The results showed that the prepared P3OT – PMMA polymer blend films exhibited suitable optical properties for the applications of solar cells, optical sensors, and photonic devices.

scholarly journals Synthesis and Characterization of PLA-Micro-structured Hydroxyapatite Composite Films

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 274 ◽  
Author(s):  
Andreea Madalina Pandele ◽  
Andreea Constantinescu ◽  
Ionut Cristian Radu ◽  
Florin Miculescu ◽  
Stefan Ioan Voicu ◽  
...  
Keyword(s):  
Composite Films ◽  
Synthesis Method ◽  
Polymer Chains ◽  
Force Microscopy ◽  
Degradation Temperature ◽  
Atomic Force ◽  
Hydroxyapatite Composite ◽  
Ft Ir ◽  
Ir And Raman

This article presents a facile synthesis method used to obtain new composite films based on polylactic acid and micro-structured hydroxyapatite particles. The composite films were synthesized starting from a polymeric solution in chloroform (12 wt.%) in which various concentrations of hydroxyapatite (1, 2, and 4 wt.% related to polymer) were homogenously dispersed using ultrasonication followed by solvent evaporation. The synthesized composite films were morphologically (through SEM and atomic force microscopy (AFM)) and structurally (through FT-IR and Raman spectroscopy) characterized. The thermal behavior of the composite films was also determined. The SEM and AFM analyses showed the presence of micro-structured hydroxyapatite particles in the film’s structure, as well as changes in the surface morphology. There was a significant decrease in the crystallinity of the composite films compared to the pure polymer, this being explained by a decrease in the arrangement of the polymer chains and a concurrent increase in the degree of their clutter. The presence of hydroxyapatite crystals did not have a significant influence on the degradation temperature of the composite film.

scholarly journals Cellulose-Cyclodextrin Co-Polymer for the Removal of Cyanotoxins on Water Sources

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2075
Author(s):  
Diego Gomez-Maldonado ◽  
Iris Beatriz Vega Erramuspe ◽  
Ilari Filpponen ◽  
Leena-Sisko Johansson ◽  
Salvatore Lombardo ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Cellulose Nanofibrils ◽  
Human Consumption ◽  
Nutrient Runoff ◽  
Force Microscopy ◽  
Atomic Force ◽  
Safe Limits ◽  
Ft Ir ◽  
Recreational Use

With increasing global water temperatures and nutrient runoff in recent decades, the blooming season of algae lasts longer, resulting in toxin concentrations that exceed safe limits for human consumption and for recreational use. From the different toxins, microcystin-LR has been reported as the main cyanotoxin related to liver cancer, and consequently its abundance in water is constantly monitored. In this work, we report a methodology for decorating cellulose nanofibrils with β-cyclodextrin or with poly(β-cyclodextrin) which were tested for the recovery of microcystin from synthetic water. The adsorption was followed by Quartz Crystal Microbalance with Dissipation monitoring (QCM-D), allowing for real-time monitoring of the adsorption behavior. A maximum recovery of 196 mg/g was obtained with the modified by cyclodextrin. Characterization of the modified substrate was confirmed with Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Photoelectron Spectroscopy (XPS), Thermogravimetric Analysis (TGA), and Atomic Force Microscopy (AFM).

Characterization of Asymmetric Polydiacetylene Ultrathin Films

1995 ◽  
Vol 382 ◽  
Author(s):  
D. W. Cheong ◽  
V. Shivshankar ◽  
H. C. Wang ◽  
C. M. Sung ◽  
J. Kumar ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Second Harmonic ◽  
Film Deposition ◽  
Asymmetric Structure ◽  
Blodgett Film ◽  
Force Microscopy ◽  
Langmuir Blodgett ◽  
Atomic Force ◽  
Ft Ir

ABSTRACTNonlinear optical (NLO) ultrathin films of a preforrned asymmetric polydiacetylene have been fabricated by Z-type Langmuir-Blodgett film deposition from the air-water interface. Induced in-plane orientation of the polydiacetylene backbone on the substrates has been confirmed by UV/Vis, FT-IR dichroism, and degenerate four wave mixing (DFWM) studies. All the measurements indicate that the backbone is prefe rentially oriented along the dipping direction. Second harmonic generation study suggests that the LB multilayers form an asymmetric structure (Z-type) due to the accumulation of 2-dimensional ordered monolayer and the dominant induced second order polarization is in the plane of the film. The film morphology and molecular orientation have been investigated by atomic force microscopy (AFM).

scholarly journals Characterization of the Spindle Morphology Nanomicelles Assembled from Sericin and Gelatin

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Xiaozhou Su ◽  
Lei Li ◽  
Weihan Huang
Keyword(s):  
Electron Microscopy ◽  
Protein Concentration ◽  
Scanning Calorimetry ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Ft Ir ◽  
And Storage ◽  
Ft Ir Spectroscopy

Complex nanomicelles were prepared by sericin and type A gelatin with molecular weight of 5789 Da and 128664 Da separately. The assembling conditions were as follows: mass ratio (sericin/gelatin) was 1 : 1, protein concentration was 0.5%, temperature was 35°C, and assembling time was 18 hours. Scanning electron microscopy (SEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and dynamic light scattering (DLS) were conducted to observe and characterize the complex nanomicelles. Results showed that the complex sericin/gelatin micelles was a kind of nanospindle micelles. The micelles had high electrochemical stability, thermal stability, antidilution stability, and storage stability.

Characterization of latex blend films by atomic force microscopy

Polymer ◽  
1996 ◽  
Vol 37 (25) ◽  
pp. 5577-5582 ◽  
Author(s):  
Abhijit A. Patel ◽  
Jianrong Feng ◽  
Mitchell A. Winnik ◽  
G.Julius Vancso ◽  
Carla B. Dittman McBain
Keyword(s):  
Atomic Force Microscopy ◽  
Blend Films ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals FT-IR Characterization of Antimicrobial Hybrid Materials through Sol-Gel Synthesis

2020 ◽  
Vol 10 (3) ◽  
pp. 1180 ◽  
Author(s):  
Michelina Catauro ◽  
Simona Piccolella ◽  
Cristina Leonelli
Keyword(s):  
Hydrogen Bonds ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Titanium Butoxide ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ft Ir ◽  
Escherichia Coli Bacteria ◽  
Sol Gel Synthesis

Silica/polycaprolactone and titania/polycaprolactone hybrid organic/inorganic amorphous composites were prepared via a sol-gel method starting from a multi-element solution containing tetramethyl orthosilicate (TMOS) or titanium butoxide (TBT), polycaprolactone (PCL), water and methylethylketone (MEK). The molecular structure of the crosslinked network was based on the presence of the hydrogen bonds between organic/inorganic elements as confirmed by Fourier Transform Infra-Red (FT-IR) analysis. In particular, the structure of crosslinked network was realized by hydrogen bonds between the X-OH (X = Si or Ti) group (H donator) in the sol-gel intermediate species and ester groups (H-acceptors) in the repeating units of the polymer. The morphology of the hybrid materials; pore size distribution, elemental homogeneity and surface features, was studied by scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) and by atomic force microscopy (AFM). The bioactivity of the synthesized hybrid materials was confirmed by observing the formation of a layer of hydroxyapatite (HAP) on the surface of the samples soaked in a simulated body fluid. The antimicrobial behavior of synthetized hybrids was also assessed against Escherichia coli bacteria. In conclusion, the prepared hybrid materials are proposed for use as future bone implants.

Characterization of Areva javanica fiber – A possible replacement for synthetic acrylic fiber in the disc brake pad

2018 ◽  
Vol 49 (3) ◽  
pp. 294-317 ◽  
Author(s):  
Md Javeed Ahmed ◽  
MA Sai Balaji ◽  
SS Saravanakumar ◽  
MR Sanjay ◽  
P Senthamaraikannan
Keyword(s):  
Wear Test ◽  
Disc Brake ◽  
Brake Pad ◽  
X Ray Diffraction ◽  
Acrylic Fiber ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ft Ir

Areva javanica (AJ), a natural cotton flowers fiber of Amaranthaceae family was taken up for the study of its possible utilization in a friction composite. The chemical composition of Areva javanica fiber (AJF) such as cellulose, lignin, ash, moisture, wax content, and density was evaluated. In addition to these, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and differential scanning calorimeter (DSC) tests were performed. The surface roughness of AJ fiber was estimated using atomic force microscopy (AFM) and the statistical analysis using Weibull distribution was carried out to identify the diameter of AJ fiber. TGA studies revealed its moderate thermal resistance upto 219℃, and a density of 1.4005 g/cc was estimated of AJF. An attempt was made to make use of the AJF as a potential reinforcement material for acrylic fibers in an organic disc brake pad formulation. Upon fibrization, AJ fibrillates and forms a dense structure, a vital property required for the production of a brake pad. The role of AJ fiber in brake pad was studied by investigating the behavior of fibers from the mixing stage to the cured brake pad. Results revealed that the developed brake pad had a density of 2.01 g/cc, hardness HRS 91, Loss on ignition 21.68%, and cold and hot shear strengths of 44 and 27 kg/cm2, respectively. These values were very close to that of an Acrylic fiber based brake pad. The wear test using Friction Assessment and Screening test (FAST) gave the wear percentage of 0.0187 in3/Hp-h which was found to be 16% higher than AJF (0.0159 in3/Hp-hr) based brake pad.

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