Study on Preparation and Performance of γ-Ray Protection Coating

2011 ◽  
Vol 418-420 ◽  
pp. 835-839 ◽  
Author(s):  
Yuan Lin Zhou ◽  
Xiao Na Zhu ◽  
Ying Jun Li ◽  
Shao Tao Zheng ◽  
Li Li
Keyword(s):  
Contact Angle ◽  
Fourier Transform ◽  
Electron Microscope ◽  
Average Diameter ◽  
Atomic Force ◽  
Ft Ir ◽  
Γ Ray ◽  
And Performance ◽  
Protection Coating ◽  
Scanning Electron

A kind of novel protective coating was prepared by using super-hydrophobic PbWO4 nanocrystals as functional stuffing. The samples were characterized systematically by means of scanning electron microscope (SEM), contact angle analyzer, atomic force microscope (AFM) and Fourier transform infrared spectroscopy(FT-IR). The effects of various amount of nano-PbWO4 particles on shielding ratio to 59.5 keV γ-ray were also discussed. The results revealed that the average diameter of PbWO4 nanocrystals were about 32nm. The contact angle between the modified PbWO4 and water was amounted to 153.08°, which showed that the modified PbWO4 owned super hydrophobic surfaces. The modified PbWO4 had good dispersion and stability in organic solvents. Chemistry reaction happened between components of coatings and nano-PbWO4 particles, thus it showed good compatibility with binders. The shielding ratio to γ-ray was up to 32%, and the hardness and levelling property was greatly improved.

scholarly journals Ciprofloxacin Based on Carrier Double Layered Hydroxide Nano-particles of Fe+3/Fe+2, Fe+3/Ni+2, Al+3/Fe+2, and Al+3/Ni+2 Ions

2020 ◽  
Vol 10 (01) ◽  
pp. 119-126
Author(s):  
Noor M. Mohammed ◽  
Farah AH. Kadhim ◽  
Aseel A. Hammood ◽  
Ashour H. Dawood
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Ft Ir ◽  
Double Layered Hydroxide ◽  
Scanning Electron ◽  
Ft Ir Spectroscopy

The double-layered hydroxide nano-particles compounds with ciprofloxacin drug were carried out by preparation of the double layered hydroxide (DLH) of M+3/M+2 ions for selective ions. The ciprofloxacin drug was inserted between them. The resulted compounds were characterized by X-Ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and Fourier Transform Infrared (FT-IR) spectroscopy; the antibacterial studied done by using the gram (+) and gram (-) pigments.

Novel Antibacterial Nanofibers of Chitosan and Polyurethane Prepared by Electrospinning

2010 ◽  
Vol 150-151 ◽  
pp. 1452-1456 ◽  
Author(s):  
Wei Min Kang ◽  
Bo Wen Cheng ◽  
Quan Xiang Li ◽  
Fang Fang Zuo
Keyword(s):  
Tissue Engineering ◽  
Extracellular Matrix ◽  
Antibacterial Activity ◽  
Fourier Transform ◽  
Electron Microscope ◽  
Average Diameter ◽  
Chitosan Concentration ◽  
Ft Ir ◽  
First Time ◽  
Scanning Electron

The chitosan(CS)/polyurethane(PU) blend nanofibers have been prepared for the first time by electrospinning. Formic acid (FA) and Hexafluoroisopropanol (HFIP) were found to be the co-solvent for electrospinning. The CS/PU blend solutions in various ratios were studied for electrospinning into nanofibers. The diameter and morphology of the fibers were shown by scanning electron microscope (SEM). It was found that the average diameter of the chitosan/PU blend fibers became larger, and the morphology of the fibers became finer with the content of PU increasing. To show the molecular interactions, CS/PU fibers were characterized by Fourier transform infrared spectroscopy (FT-IR). Moreover, the antibaterial activity of blend nanofibers against Escherichia coil (E.coil) was measured via optical density method. The blend nanofibers exhibited satisfying antibacterial activity against E.coil, even the chitosan concentration was only 5wt%. Therefore, the spun nanofibers are expected to be used in the native extracellular matrix for tissue engineering.

scholarly journals CHARACTERIZATION AND HYPOGLYCEMIC STUDY OF ISOLATED NATURAL POLYMER FROM THE STEM OF MANILKARA HEXANDRA (ROXB.) DUBARD

2019 ◽  
pp. 206-213
Author(s):  
IRUDAYA MONISHA S. ◽  
ROSALINE VIMALA J.
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Moisture Content ◽  
Natural Polymer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Scanning Electron

Objective: In the present study, the isolated natural polymer from the stem of Manilkara hexandra and their physiochemical parameters were investigated. It is further involved in hypoglycemic studies. Methods: The gum exudates were screened for phytochemicals, physicochemically analyzed for solubility, pH, total ash, moisture content, acid insoluble ash, water soluble ash, sulfated ash, flow property, and it is characterized by Fourier Transform Infrared analysis (FT-IR), Scanning Electron Microscope (SEM), X-ray diffraction analysis (XRD), Nuclear Magnetic Resonance (NMR) studies (13Carbon and 1Proton) and it was examined in vitro studies by hypoglycaemic activity. Results: The isolated gum extracted from the stem of Manilkara hexandra (Roxb.) Dubard ash values were found to be low. The gum is found to be hygroscopic in nature due to its high moisture content (0.9131±0.03). Fourier Transform Infrared (FT-IR) spectra show relevant functional groups for gum, which is further confirmed by resonance spectral studies. The X-ray diffraction (XRD) pattern shows that the gum is amorphous as well as crystalline in nature. Scanning Electron Microscope (SEM) image confirms that the gum particles have irregular size and shape. Sugar composition analysis by Thin Layer Chromatography indicated the presence of rhamnose, arabinose. The in vitro study of hypoglycemic activity shows the best report compared with the standard. The experimental evidence offers scope to use this natural polymer in the food and pharmaceutical industry. Conclusion: The isolated natural polymer shows good result in hypoglycemic studies compared with standard.

scholarly journals Surface modified nano-zeolite used as carrier for slow release of sulphur

2014 ◽  
Vol 6 (1) ◽  
pp. 19-26 ◽  
Author(s):  
M. Thirunavukkarasu ◽  
K. S. Subramanian
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Electron Microscope ◽  
Slow Release ◽  
Percolation Reactor ◽  
Sulphur Fertilizer ◽  
Ft Ir ◽  
Surface Modified ◽  
Scanning Electron

Surface modified nano-zeolite (SMNZ) was used as carrier to develop nano-zeolite based nano-sulphur fertilizer. A laboratory study on sulphur nano-fertilizer and conventional sulphur fertilizer were studied with percolation reactor system to evaluate the slow release of sulphur from both fertilizers in ambient temperature. SMNZ and sulphur nano-fertilizer were characterized using Fourier Transform Infrared Spectroscopy (FT-IR), Zeta Analyzer, Raman Spectroscopy, XRD and Scanning Electron Microscope (SEM). Raman spectroscopy confirmed the sulphur attachment at 480 cm-1 in the SMNZ. The FTIR spectra at 1030 cm-1 confirmed the sulphate attachments in the SMNZ spectrum. Zeta analyzer showed the surface charge of sulphur nano-fertilizer had (-) 52.6 mV. SEM imaged the sulphur loaded SMNZ in irregular flake like structure. A comparative study of the release of sulphate (SO4 2-) from fertilizer-loaded SMNZ and (NH4)2 SO4 fertilizers were performed using the percolation reactor. The results showed that the SO42- supply from fertilizer-loaded SMNZ was available even after 912 h of continuous percolation, whereas SO42- from (NH4)2 SO4 was exhausted within 384 h. These properties suggest that SMNZ has a great potential as the fertilizer carrier for slow release of SO42-.

scholarly journals Penghambatan Interaksi Eutektik Akibat Energi Kompresi dengan Penambahan Pati Jagung

2018 ◽  
Vol 5 (1) ◽  
pp. 17
Author(s):  
Dwi Setyawan ◽  
Noorma Rosita ◽  
Diajeng Putri Paramita ◽  
Dicky Pratama
Keyword(s):  
Thermal Analysis ◽  
Tensile Strength ◽  
Fourier Transform ◽  
Differential Thermal Analysis ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Fourier Transform Infrared ◽  
Ft Ir ◽  
Scanning Electron

Penelitian ini dilakukan untuk mengetahui penghambatan interaksi eutektik yang terjadi pada pengempaan campuran biner ibuprofen-asam stearat dengan penambahan pati jagung. Pati jagung ditambahkan ke dalam campuran biner ibuprofen-asam stearat 40:60 (% b/b) dengan komposisi 10, 20, dan 30% (b/b) kemudian dikempa. Karakterisasi fisik tablet kempa dilakukan menggunakan analisis kekuatan mekanik, differential thermal analysis (DTA), difraksi sinar-X serbuk (DSXS), spektroskopi fourier transform infrared (FT-IR), dan scanning electron microscope (SEM). Uji kekuatan mekanik menunjukkan penambahan pati jagung 10 dan 20% menyebabkan penurunan nilai tensile strength dibandingkan campuran biner. Penambahan 20% pati jagung menyebabkan pergeseran puncak ke sudut 2Ɵ lebih besar disertai dengan penurunan intensitas difraksi sinar-X. Analisis termal tablet kempa campuran biner-pati jagung 20% menunjukkan peningkatan titik lebur eutektik dan spektra FT-IR yang dihasilkan tidak berbeda dibandingkan dengan tablet kempa campuran biner. Mikrofoto SEM menunjukkan penambahan pati jagung 20% dapat mencegah terjadinya sintering pada tablet kempa ibuprofen-asam stearat. Hasil karakterisasi fisik mengindikasikan bahwa pati jagung dapat meredam pembentukan eutektik akibat energi kompresi antara ibuprofen-asam stearat pada komposisi 20% (b/b)

Effect of Curing Temperature on Degree Imidization of Melamine-BPADA Hyperbranched Polyimide Studied by FT-IR

2015 ◽  
Vol 754-755 ◽  
pp. 251-255 ◽  
Author(s):  
Muhammad Bisyrul Hafi Othman ◽  
Hazizan Md. Akil ◽  
Hasnah Osman ◽  
Zulkifli Ahmad
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Hydrochloric Acid ◽  
Annealing Temperature ◽  
Main Chain ◽  
Curing Temperature ◽  
X Ray ◽  
Thermal Imidization ◽  
Ft Ir ◽  
Scanning Electron

We has synthesized hyperbranched polyamides (HPI) series containing s-triazine rings derived from melamine in the main chain, according to A3 + B2 approach which involving the emulsion polymerization reactions of melamine in hydrochloric acid and stepwise thermal imidization. The effect of curing temperature on the degree of imidization (DI) films of Melamine-BPADA (4,4'-(4,4'-Isopropylidenediphenoxy) bis (phthalic anhydride) has been examined by using the techniques of FTIR (Fourier transform infrared) and SEM-EDX (Scanning Electron Microscope-Electron Diffaction X-Ray). The DI varied significantly with annealing temperature before the films were fully cured. The Melamine-BPADA film was nearly fully cured when annealed at 180 °C, while the same was revealed for SEM-EDX. The morphology of the Melamine-BPADA film did not vary with annealing at temperatures and the FTIR experiment fairly match those from the SEM-EDX.

Shape Controllable Preparation of PbS Crystal by a Simple Solvothermal Method

2013 ◽  
Vol 820 ◽  
pp. 11-14
Author(s):  
Zhong Biao Zhao ◽  
Peng Wang ◽  
Li Bo Fan ◽  
Zi Fa Chen ◽  
Chun Meng Wang
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Lead Sulfide ◽  
Solvothermal Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Controllable Preparation ◽  
Scanning Electron

Hierarchical eight-arm, star-shaped lead sulfide (PbS) crystals have been successfully synthesized by a simple hydrothermal method. When pyridine was used as solvent, candy-like PbS crystal was obtained. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform-infrared (FT-IR) measurements.

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

Isolasi Dan Karakterisasi Bentonit Alam Menjadi Nanopartikel Monmorillonit

2018 ◽  
Vol 3 (1) ◽  
pp. 12 ◽  
Author(s):  
Zaimahwati Zaimahwati ◽  
Yuniati Yuniati ◽  
Ramzi Jalal ◽  
Syahman Zhafiri ◽  
Yuli Yetri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Surface Morphology ◽  
Average Diameter ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Scanning Electron ◽  
Sedimentation Processes

<p>Pada penelitian ini telah dilakukan isolasi dan karakterisasi bentonit alam menjadi nanopartikel montmorillonit. Bentonit alam yang digunakan diambil dari desa Blangdalam, Kecamatan Nisam Kabupaten Aceh Utara.  Proses isolasi meliputi proses pelarutan dengan aquades, ultrasonic dan proses sedimentasi. Untuk mengetahui karakterisasi montmorillonit dilakukan uji FT-IR, X-RD dan uji morfologi permukaan dengan Scanning Electron Microscopy (SEM). Partikel size analyzer untuk menganalisis dan menentukan ukuran nanopartikel dari isolasi bentonit alam. Dari hasil penelitian didapat ukuran nanopartikel montmorillonit hasil isolasi dari bentonit alam diperoleh berdiameter rata-rata 82,15 nm.</p><p><em>In this research we have isolated and characterized natural bentonite into montmorillonite nanoparticles. Natural bentonite used was taken from Blangdalam village, Nisam sub-district, North Aceh district. The isolation process includes dissolving process with aquades, ultrasonic and sedimentation processes.  The characterization of montmorillonite, FT-IR, X-RD and surface morphology test by Scanning Electron Microscopy (SEM). Particle size analyzer to analyze and determine the size of nanoparticles from natural bentonite insulation. From the research results obtained the size of montmorillonite nanoparticles isolated from natural bentonite obtained an average diameter of 82.15 nm.</em></p>

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