scholarly journals Physical properties characterization of Natural Protein Fibre Peacock Feather Barbs

2017 ◽  
Author(s):  
Sekhar Das ◽  
Seiko Jose ◽  
Pintu Pandit
Keyword(s):  
Thermal Stability ◽  
Vertical Structure ◽  
Average Length ◽  
X Ray Diffraction ◽  
Colour Intensity ◽  
Sem Images ◽  
X Ray ◽  
Natural Protein ◽  
Mechanical Characterisation

AbstractIn the present study, the barbs of peacock feather were subjected to its physio-mechanical characterisation. Various properties of barbs viz., bundle strength, diameter, moisture regain, thermal stability, X-ray diffraction, colour intensity and FTIR was studied according standard analytical methods. The surface morphology of the barbs was examined using SEM images. The results indicate that the barb is a hollow vertical structure made up of protein. The average length and diameter of the barb was found to be 45 mm and 82 μm respectively. The FTIR study confirms the presence of characteristic peaks for protein, related to the keratinous material. The barbs seem to be semi-crystalline in nature, as indicated by X-ray study.

scholarly journals Electrospun Membranes Based on Polycaprolactone, Nano-Hydroxyapatite and Metronidazole

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 931
Author(s):  
Ioana-Codruţa Mirică ◽  
Gabriel Furtos ◽  
Ondine Lucaciu ◽  
Petru Pascuta ◽  
Mihaela Vlassa ◽  
...  
Keyword(s):  
Fiber Diameter ◽  
Maximum Load ◽  
Guided Bone Regeneration ◽  
Attenuated Total Reflectance ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Total Reflectance ◽  
X Ray ◽  
Electrospun Membranes

The aim of this research was to develop new electrospun membranes (EMs) based on polycaprolactone (PCL) with or without metronidazole (MET)/nano-hydroxyapatite (nHAP) content. New nHAP with a mean diameter of 34 nm in length was synthesized. X-ray diffraction (XRD) and attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR) were used for structural characterization of precursors and EMs. The highest mechanical properties (the force at maximum load, Young’s modulus and tensile strength) were found for the PCL membranes, and these properties decreased for the other samples in the following order: 95% PCL + 5% nHAP > 80% PCL + 20% MET > 75% PCL + 5% nHAP + 20% MET. The stiffness increased with the addition of 5 wt.% nHAP. The SEM images of EMs showed randomly oriented bead-free fibers that generated a porous structure with interconnected macropores. The fiber diameter showed values between 2 and 16 µm. The fiber diameter increased with the addition of nHAP filler and decreased when MET was added. New EMs with nHAP and MET could be promising materials for guided bone regeneration or tissue engineering.

Synthesis and Characterization of Cadmium with Titanium Oxide (Cd-TiO2) Nanocomposite: Testing its Antibacterial Effect

2021 ◽  
Vol 12 (4) ◽  
pp. 2523-2529
Author(s):  
Daniel Sam N ◽  
Anish C I ◽  
Sabeena G ◽  
Rajaduraipandian S ◽  
Manobala ◽  
...  
Keyword(s):  
Sol Gel ◽  
Gram Negative Bacteria ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Gram Negative ◽  
X Ray ◽  
Weight Percentage ◽  
Inhibition Concentration ◽  
Xrd Patterns

Sol gel methods were used for the study of the antimicrobial activity of Cd-TiO2 against gram-negative and positive bacteria. These Cd-TiO2 have been characterized by various optical and techniques. They have been exhibited by X-ray diffraction, scanning electron microscopy, ultraviolet spectroscopy, and infrared spectroscopy. The structures of the various XRD patterns indicate that the product has a structure. The particle size of Cd-TiO2 is 35nm. The SEM images confirm the spherical appearance of the sample. The energy X-ray spectra have been confirmed as well and then C, O, Ti, Cd, Pt element are present in Cd-TiO2. The weight percentage of Cadmium is 5.8%, Ti is 51.03%, C is 5.13% and O is 31.75% in Cd-TiO2. BET image shows that the major pore size distribution of Cd-TiO2 is ranged from 2.24 nm. The Cd-TiO2 that the antibacterial activity when tested against the pathogens only gram-negative bacteria such as Pseudomonas. The zone of minimum inhibition concentration was measured in a range of 20mm in 25μl and 30mm in 100μl.

Characterization of Electrospun Poly(Lactic Acid)/polyaniline Blend Nanofibers

2011 ◽  
Vol 332-334 ◽  
pp. 317-320 ◽  
Author(s):  
Hui Qin Zhang
Keyword(s):  
Lactic Acid ◽  
Composite Nanofibers ◽  
Weight Ratio ◽  
Electrospinning Process ◽  
Poly Lactic Acid ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Ft Ir

In this study, composite nanofibers of polyaniline doped with dodecylbenzene sulfonic acid (PANI-DBSA) and Poly(lactic acid) (PLA) were prepared via an electrospinning process. The surface morphology, thermal properties and crystal structure of PLA/PANI-DBSA nanofibers are characterized using Fourier transform infrared spectroscopy (FT-IR), wide-angle x-ray diffraction (WAXD) and scanning electron microscopy (SEM). SEM images showed that the morphology and diameter of the nanofibers were affected by the weight ratio of blend solution.

The Preparation and Characterization of Polybenzoxazole Copolymerized with Multiwalled Carbon Nanotube via Direct Friedel-Crafts Acylation

2014 ◽  
Vol 989-994 ◽  
pp. 560-563
Author(s):  
Yong Chen ◽  
Jun Qian ◽  
Qi Xin Zhuang ◽  
Zhe Wen Han
Keyword(s):  
Carbon Nanotube ◽  
Polyphosphoric Acid ◽  
Multiwalled Carbon Nanotube ◽  
X Ray Diffraction ◽  
Acylation Reaction ◽  
Multiwalled Carbon ◽  
Sem Images ◽  
X Ray ◽  
Electronic Microscope

Multiwalled carbon nanotube (MWCNT) was subjected a copolymerization reaction with 4, 6-diaminoresorcinol salt (DAR•2HCl) and terephthalic acid (TA) in polyphosphoric acid (PPA) by Friedel-Crafts acylation reaction without any acid treatment or modification. The structure and morphology of the as-prepared poly (p-phenylene benzobisoxazole) (PBO)/MWCNT nanocomposites were characterized by X-ray diffraction (XRD) and scanning electronic microscope (SEM). The SEM images indicated that MWCNTs can disperse in PBO matrix uniformly without agglomeration and MWCNTs have been introduced into PBO matrix by covalent bonding via Friedel-Crafts acylation between MWCNTs and TA.

Characterization and Application of Bayah Natural Zeolites for Ammonium Capture: Isotherm and Kinetic

2020 ◽  
Vol 988 ◽  
pp. 51-64 ◽  
Author(s):  
Teguh Kurniawan ◽  
Nuryoto ◽  
Rahmayetty
Keyword(s):  
Isotherm Models ◽  
Natural Zeolites ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Type Iv ◽  
Major Cations ◽  
Isotherm Adsorption ◽  
Elovich Equation

The aim of this study is to characterize Bayah natural zeolites and tested for ammonium capture. Characterization of Bayah natural zeolites were performed by X-ray diffraction (XRD), scanning electron microscope (SEM), and nitrogen physisorption. The natural zeolites were identified as mordenite and clinoptilolite. Non-zeolitic phase appeared on the XRD pattern was quartz. The morphology of clinoptilolite and mordenite were observed as platy and needle shape in the SEM images, respectively. Major cations were K+ and Ca2+ which were determined by energy dispersive X-ray. Nitrogen isotherm physisorption suggested that the natural zeolites was typical of type IV isotherm. Pore size distribution were determined using Barrett, Joyner, and Halenda model with mesopore size 3-5 nm. Ammonium exchange on Bayah natural zeolites were conducted in a batch experiment by varying the particle sizes, time and mass loading. Non-linear least squared method was applied to fit the experimental data with various kinetic and isotherm models. The kinetic data was well fitted with the Elovich equation with error 1.6 x 10-4. Isotherm adsorption of ammonium followed Langmuir-Vageler with error 4 x 10-2.

Synthesis and Characterization of Silver Nanoparticles Anchored on Montmorillonite via Chemical Reduction

2016 ◽  
Vol 11 ◽  
pp. 30-37 ◽  
Author(s):  
Danica Louise S. Bonga ◽  
Ma. Manna Farrel B. Pinto ◽  
Mary Fatima T. Tayad
Keyword(s):  
Ag Nanoparticles ◽  
Sodium Citrate ◽  
Chemical Reduction ◽  
Average Crystallite Size ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Clay Particles ◽  
X Ray ◽  
Mean Size

Montmorillonite clay particles were decorated with silver (Ag) nanoparticles by chemical reduction of Ag nitrate with sodium citrate. X-ray diffraction (XRD) and energy dispersive X-ray spectrometry (EDS) confirmed the presence of metallic Ag on the surface of montmorillonite. The average crystallite size of the Ag nanoparticles obtained from the broadening of the 111 Ag peak ranged at 13-16 nm. On the other hand, the apparent particle sizes obtained from the SEM images were about 79-128 nm, suggesting that the nanoparticles are polycrystalline and possibly agglomerated. The increase in the concentration of reducing agent produced smaller Ag nanoparticles with narrower size distribution. The antibacterial test showed that the Ag nanoparticles, with mean size of 79 nm, adsorbed on montmorillonite were able to inhibit the growth of Staphylococcus aureus (S. aureus) with an antimicrobial index of 0.4.

Preparation and Characterization of PET/MMT Nanocomposition Modified by MDI

2014 ◽  
Vol 904 ◽  
pp. 7-9
Author(s):  
Xiao Hua Gu ◽  
Xi Wei Zhang ◽  
Bao Yun Xu ◽  
Peng Zeng
Keyword(s):  
Thermal Stability ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermogravimetric Analyzer ◽  
Organic Montmorillonite ◽  
Polymerization Method ◽  
Thermal Stability Of

In this paper, the diphenyl methane diisocyanate (MDI) was used to modify montmorillonoid (MMT) and got the organic montmorillonite (OMMT), which was used with the monomers of PET by in situ polymerization method to prepare PET/MMT nanocomposition. The OMMT was analyzed by the X ray diffraction (XRD) to test the change of the spacing layer. Dispersion of MMT in the PET/MMT nanocomposites were studied with XRD and SEM and by means of thermogravimetric analyzer (TGA) on the thermal stability of PET/MMT nanocomposites. The results showed that, MDI modified MMT successfully, and the compatibility of MMT and PET was increased .

Synthesis and characterization of a silylated Brazilian clay mineral surface

2014 ◽  
Vol 68 (7) ◽  
Author(s):  
Márcia Silva ◽  
Saloana Gomes ◽  
Maria Fonseca ◽  
Kaline Sousa ◽  
José Espínola ◽  
...  
Keyword(s):  
Clay Mineral ◽  
Solid State Nmr ◽  
Textural Properties ◽  
Hydroxyl Groups ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Diffraction Patterns ◽  
Trimethoxy Silane

AbstractClay mineral containing kaolinite, illite and montmorillonite was organofunctionalized with silylating agents: (3-aminopropyl)triethoxysilane, 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane and (3-mercaptopropyl)trimethoxy-silane, to yield three hybrids labelled Clay1, Clay2 and Clay3, respectively. These solids were characterized using elemental analysis, thermogravimetry, X-ray diffractometry, infrared spectroscopy, scanning electron micrograph, and 29Si and 27Al solid state NMR. Immobilized quantities of the organic groups were 0.66 mmol g−1, 0.48 mmol g−1 and 0.88 mmol g−1 for Clayx (x = 1–3), respectively. X-ray diffraction patterns confirmed the immobilization of silanes onto the surface without changes in the textural properties of the clay mineral as noted from the SEM images. Spectroscopic measurements were in agreement with the covalent bonding between the silanes and the hydroxyl groups deposited on the surface. The new hybrids were utilized as adsorbents of cobalt in aqueous solution, with retention values of 0.78 mmol g−1, 1.1 mmol g−1 and 0.70 mmol g−1 for Clayx (x = 1–3), respectively.

Synthesis and Characterization of CoFe2O4 Nanoparticles

2011 ◽  
Vol 261-263 ◽  
pp. 533-536 ◽  
Author(s):  
Zhen Feng Cui ◽  
Dehui Sun
Keyword(s):  
Solution Method ◽  
Size Range ◽  
Information Storage ◽  
Resonance Imaging ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Rhombohedral Crystal ◽  
Average Size

We synthesized the magnetic CoFe2O4nanoparticles using a solution method in the presence of hexamethylenetetramine (HMTA) at 85 °C for 6 h. Their morphologies, structures, surface properties and magnetism were characterized by Field emission scanning electron microscopy (FE-SEM) images, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and Vibrating sample magnetometer (VSM), respectively. FE-SEM results show that the synthesized samples are irregular nanoparticles with average size range of about 40-120 nm. XRD confirms that the samples belong to the rhombohedral crystal system. The magnetic CoFe2O4nanoparticles have the potential application in magnetic resonance imaging, high-density information storage and drug delivery.

The Surface Chemistry Characterization of Pyrite, Sphalerite and Molybdenite after Bioleaching

2017 ◽  
Vol 262 ◽  
pp. 487-491 ◽  
Author(s):  
Sina Ghassa ◽  
Hadi Abdollahi ◽  
Mahdi Gharabaghi ◽  
Saeed Chehreh Chelgani ◽  
Mohammad Jafari
Keyword(s):  
Surface Chemistry ◽  
Dissolution Kinetics ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Chemical Leaching ◽  
Characterization Methods ◽  
X Ray ◽  
Ash Layer ◽  
Before And After

The mineral surface chemistry characterization is essential to describe the dissolution kinetics in leaching and bioleaching. Five different methods, including X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR) and Raman Spectroscopy, have been applied to study the surface chemistry changes during pyrite, sphalerite and molybdenite bioleaching. The surface characterizations have been done for samples before and after biological and chemical leaching. The SEM images illustrated that the minerals surfaces were smooth before processing, while they covered with an ash layer after biological treatment. Although EDS analysis and Raman spectrum demonstrated the potassium jarosite formation on the pyrite surface during bioleaching, the formation of jarosite layer did not occur on the sphalerite surfaces during bioleaching. On the other hand, a sulfur layer formation on the sphalerite surface was confirmed by mentioned characterization methods. Finally, according to the XRD and EDS spectrum the molybdenite surface had been covered both with sulfur and jarosite.

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