X-ray diffraction studies and phase volume determinations in poly(ethylene glycol)-montmorillonite nanocomposites

2005 ◽  
Vol 54 (5) ◽  
pp. 807-813 ◽  
Author(s):  
Biqiong Chen ◽  
Julian RG Evans
Keyword(s):  
Ethylene Glycol ◽  
Phase Volume ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Poly Ethylene ◽  
Montmorillonite Nanocomposites

Thermo-Responsive Supramolecular Hybrid Hydrogels Formed by Graphene Oxide-Grafted-Poly(Ethylene Glycol) and α-Cyclodextrin

2013 ◽  
Vol 718-720 ◽  
pp. 172-175
Author(s):  
Song Hua Kong ◽  
Mi Zhou ◽  
Xiao Feng Ye ◽  
Xin Qian
Keyword(s):  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Coupling Reaction ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
Hydrogen Bond Interaction ◽  
X Ray ◽  
Hybrid Hydrogels ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

Poly(ethylene glycol) methyl ether-grafted-graphene oxide (GO) was synthesized by a coupling reaction and formed inclusion complexes (ICs) after selective threading of the mPEG segments of the GO-mPEG through the cavities of α-cyclodextrins (α-CDs) units. The polypseudorotaxane structures of the as-obtained hydrogels were confirmed by X-ray diffraction, TGA, DSC, and SEM. The complexation of the mPEG segments with α-CDs and the hydrogen-bond interaction between CDs resulted in the formation of supramolecular hybrid hydrogels with a strong network. The resultant hybrid hydrogels were found to be thermo-responsive, and could be applied as a promising drug delivery system.

Gelation Crystallization of Poly(L-Lactide) in Solvents of Varying Molecular Size

2007 ◽  
Vol 15 (5) ◽  
pp. 389-393
Author(s):  
Hong Hao ◽  
Guozheng Liang ◽  
Junmin Zhao
Keyword(s):  
Differential Scanning Calorimetry ◽  
Ethylene Glycol ◽  
Crystallization Rate ◽  
Molecular Size ◽  
Large Molecule ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Poly Ethylene

The crystallization behaviour of poly(L-lactide) (PLLA) samples prepared in large-molecule solvents, such as poly(ethylene glycol) (PEG), was studied by differential scanning calorimetry (DSC) and X-ray diffraction. The results indicate that those samples recovered from large-molecule solvents exhibit higher crystallinity, non-isothermal crystallization temperature and faster crystallization rate than the ones crystallized in a small-molecule solvent. The crystallinity of samples from PLLA/PEG gel is about 73% measured by the DSC. The molar size of the solvent has a large influence on the formation of helical conformations and, thereby on the crystallization rate of PLLA in solution.

Solvation Structure of Poly(ethylene glycol) in Ionic Liquids Studied by High-energy X-ray Diffraction and Molecular Dynamics Simulations

2013 ◽  
Vol 46 (6) ◽  
pp. 2369-2375 ◽  
Author(s):  
Hanako Asai ◽  
Kenta Fujii ◽  
Kengo Nishi ◽  
Takamasa Sakai ◽  
Koji Ohara ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Ethylene Glycol ◽  
High Energy ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Solvation Structure ◽  
Poly Ethylene ◽  
Dynamics Simulations

scholarly journals Effect of Poly Ethylene Glycol on CuO Nanoparticles and its Antibacterial Application

2016 ◽  
Vol 63 ◽  
pp. 111-118 ◽  
Author(s):  
T. Hemalatha ◽  
S. Akilandeswari
Keyword(s):  
Ethylene Glycol ◽  
Quantum Confinement Effect ◽  
Antibacterial Properties ◽  
Cuo Nanoparticles ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Ft Ir ◽  
Poly Ethylene

Pure CuO nanoparticles and chemically-precipitated Poly Ethylene Glycol (PEG) used as a capping agent CuO nanocrystal continuum (0.1, 0.2, 0.3, 0.4, 0.5 gm) was anatomized for structural and morphological research using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and Field - Emission Scanning Electron Microscopy (FE-SEM). Their X-ray Diffraction (XRD) analysis manifested monoclinic crystallinity in pure and PEG-capped CuO nanorods, with an average crystallite size of 21.63nm and 13-16nm respectively. The morphological analysis revealed their structural conformation. The FT-IR spectrum affirmed the presence of Cu-O bonds. The optical property of the aforesaid nanorods was studied by UV-Visible reflectance (UV-Vis DRS). The UV analysis showed that all the capped products show signs of good optical quality in the UV region and also the absorption edge was blue shifted with a band gap of 1.85 eV for 0.4gm PEG capped as results of quantum confinement effect. The antibacterial properties of the as-prepared nanostructures investigated for various human pathogens using disc diffusion method. The result showed the significant antibacterial activity bothgram positiveandgram negativebacteria.

Clay/(PEG-CMC) biocomposites as a novel delivery system for ibuprofen

2020 ◽  
Vol 40 (4) ◽  
pp. 350-359
Author(s):  
Nesma Baa Belmessaoud ◽  
Naima Bouslah ◽  
Nabila Haddadine
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Ethylene Glycol ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Release Mechanism ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
Poly Ethylene

AbstractIn this study we report on the preparation and characterization of biocomposites based on a sodium montmorillonite-ibuprofen (MtIb) hybrid and neat poly(ethylene glycol), neat sodium carboxymethylcellulose or poly(ethylene glycol)-carboxymethylcellulose blend 50/50 biocomposites as drug carriers. Ib, a poorly soluble drug, was first intercalated into sodium Mt and then the resulting hybrid was compounded with the different polymeric matrices. Ib incorporation efficiency in Mt was determined by UV-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction and thermal analysis. Both X-ray diffraction and differential scanning calorimetric studies revealed that the intercalation of Ib between the clay layers induced amorphization of the drug. Differential scanning calorimetry and Fourier transform infrared spectroscopy revealed the development of strong interactions between Ib and the polymer matrix. A study of the release of Ib from the synthesized biocomposites in simulated intestinal fluid (pH 7.4) was investigated. To better understand the release mechanism of drug molecules from the different carriers, several kinetic models have been applied.

Fluorescence properties of full-color-emitting BCNO phosphors synthesized under different oxygen pressure

2014 ◽  
Vol 07 (05) ◽  
pp. 1450053 ◽  
Author(s):  
Feng Zhang ◽  
Weifeng Zhang ◽  
Guoqiang Li ◽  
Yachun Wang ◽  
Hua Yuan
Keyword(s):  
Oxygen Pressure ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
New Approach ◽  
X Ray ◽  
Full Color ◽  
Emission Color ◽  
Poly Ethylene ◽  
Boron Carbon

The colorful BCNO phosphors comprised of boron, carbon, nitrogen, and oxygen atoms have been novelty synthesized by varying the environmental oxygen pressure without changing the compositions of the raw materials such as boric, urea, and poly-ethylene glycol. X-ray diffraction (XRD), fourier-transformed infrared (FTIR), and photoluminescence (PL) spectra were employed to characterize the effect of environmental oxygen pressure on the structure and PL properties of the synthesized phosphors. The results of their PL properties indicates that the emission color of these BCNO phosphors has been easily tailored for a large-range from violet to near-red regions through variations of the environmental oxygen pressure as prepared under the excitation of 365 nm. This provides a new approach to tailor the emitting colors.

X-ray imaging technique using colloid solution of Au/silica/poly(ethylene glycol) nanoparticles

2013 ◽  
Vol 17 (7) ◽  
pp. 507-514 ◽  
Author(s):  
Y. Kobayashi ◽  
H. Inose ◽  
R. Nagasu ◽  
T. Nakagawa ◽  
Y. Kubota ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Imaging Technique ◽  
Colloid Solution ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
X Ray Imaging ◽  
Poly Ethylene

scholarly journals X-Ray Imaging of Poly(Ethylene Glycol) Hydrogels Without Contrast Agents

2010 ◽  
Vol 16 (6) ◽  
pp. 1597-1600 ◽  
Author(s):  
Eric M. Brey ◽  
Alyssa Appel ◽  
Yu-Chieh Chiu ◽  
Zhong Zhong ◽  
Ming-Huei Cheng ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Contrast Agents ◽  
Poly Ethylene Glycol ◽  
X Ray ◽  
X Ray Imaging ◽  
Poly Ethylene
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