scholarly journals Polyether copolymers containing fluorescent groups: a green inhibitor for calcium carbonate

2018 ◽  
Vol 19 (3) ◽  
pp. 725-734
Author(s):  
Mengwei Xue ◽  
Changli Zhang ◽  
Qinpu Liu ◽  
Hui Yang ◽  
Guangqing Liu
Keyword(s):  
Calcium Carbonate ◽  
Sem Analysis ◽  
Scale Inhibitor ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
Green Inhibitor ◽  
Fluorescent Intensity ◽  
On Line ◽  
Trisodium Salt ◽  
Poly Ethylene

Abstract A novel fluorescent-tagged scale inhibitor, linear-dendritic double hydrophilic block copolymer (acrylic acid (AA)/Allyloxy poly(ethylene glycol) polyglycerol (APEG-PG-(OH)n)/ 8-allyloxy-1, 3, 6-pyrene trisulfonic acid trisodium salt (PA) (MA/APEG-PG-(OH)n/PA) was synthesized by AA, APEG-PG-(OH)n and PA. Structures of APEG, APEG-PG-(OH)n and MA/APEG-PG-(OH)n/PA were carried out by 1H NMR. The observation shows that the dosage and the n value of MA/APEG-PG-(OH)n/PA plays an important role on CaCO3 inhibition. MA/APEG-PG-(OH)5/PA displays superior ability to inhibit the precipitation of calcium carbonate, with approximately 91% inhibition at a level of 8 mg/L. Relationship between AA/APEG- PG-(OH)5/PA‘s fluorescent intensity and its dosage was studied. Correlation coefficient R of MA/APEG-PG-(OH)5/PA's is 0.9991. The effect on formation of CaCO3 was investigated with the combination of X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. MA/APEG-PG-(OH)5/PA can be used to accurately measure copolymer consumption on line besides providing excellent CaCO3.

scholarly journals Ultrasound-assisted Strecker synthesis of novel 2-(hetero)aryl-2-(arylamino)acetonitrile derivatives

2020 ◽  
Vol 16 ◽  
pp. 2929-2936
Author(s):  
Emese Gal ◽  
Luiza Gaina ◽  
Hermina Petkes ◽  
Alexandra Pop ◽  
Castelia Cristea ◽  
...  
Keyword(s):  
Metabolic Activation ◽  
Sem Analysis ◽  
Racemic Mixture ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
Preliminary Screening ◽  
X Ray ◽  
Strecker Reaction ◽  
Strecker Synthesis ◽  
Poly Ethylene

This work describes an efficient, simple, and ecofriendly sonochemical procedure for the preparation of new α-(arylamino)acetonitrile derivatives C-substituted with phenothiazine or ferrocene units. The synthetic protocol is based on the Strecker reaction of a (hetero)aryl aldimine substrate with trimethylsilyl cyanide (TMSCN) in poly(ethylene glycol) (PEG) solution. The advantages of the sonochemical versus the conventional α-(arylamino)acetonitrile synthesis are the significantly shorter reaction time (30 min instead of 72 hours), the higher purity and the easier separation of the product that precipitated from the reaction mixture in crystalline form as depicted by scanning electron microscopy (SEM) analysis. The single crystal X-ray diffraction analysis disclosed the arrangement of the α-(arylamino)acetonitrile molecules in the aggregated crystalline state as a racemic mixture. The mutagenic/antimutagenic potential for three representative derivatives containing phenothiazinyl, ferrocenyl, and phenyl units, respectively, was evaluated by the Ames Salmonella/microsome test using S. typhimurium TA98 and TA100 strains with and without metabolic activation. The preliminary screening results pointed out that the C-(hetero)aryl-α-(arylamino)acetonitrile derivatives can be considered genotoxically safe and possibly antimutagenic.

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.

The Effect of CaCO3 Addition on Physical Properties of ZnO-Based Crystal Glaze

2012 ◽  
Vol 620 ◽  
pp. 12-16 ◽  
Author(s):  
Abdul Rashid Jamaludin ◽  
Shah Rizal Kasim ◽  
Zainal Arifin Ahmad
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Scanning Electron Microscope ◽  
Physical Properties ◽  
Crystallization Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The effects of calcium carbonate (CaCO3) addition on the physical properties of ZnO-based crystal glaze batches were investigated. Samples were fired at different gloss firing temperatures ranging from 1180-1220°C with 3 hours soaking at 1060°C crystallization temperature. X-ray diffraction (XRD) analysis identifiedthe crystal phase occurred as willemite (Zn2SiO4) and the scanning electron microscope (SEM) analysis indicated that willemite crystals are in the acicular needle like shape that formed spherulite. The intensities of willemite peaks decreased with CaCO3 addition and completely vanished at 5.0 wt% CaCO3. Varied formation of spherulites developed of the surface of crystal glaze as the flows of the glaze stretched further as the amount of CaCO3 increased.

Fabrication of hybrid composites based on biomineralization of phosphorylated poly(ethylene glycol) hydrogels

2009 ◽  
Vol 24 (1) ◽  
pp. 50-57 ◽  
Author(s):  
Chan Woo Kim ◽  
Sung Eun Kim ◽  
Yong Woo Kim ◽  
Hong Jae Lee ◽  
Hyung Woo Choi ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Inductively Coupled Plasma ◽  
Hybrid Composites ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
3 Dimensional ◽  
Inductively Coupled ◽  
Poly Ethylene

A novel route to organic-inorganic composites was described based on biomineralization of poly(ethylene glycol) (PEG)-based hydrogels. The 3-dimensional hydrogels were synthesized by radical crosslinking polymerization of poly(ethylene glycol fumarate) (PEGF) in the presence of ethylene glycol methacrylate phosphate (EGMP) as an apatite-nuclating monomer, acrylamide (AAm) as a composition-modulating comonomer, and potassium persulfate (PPS) as a radical initiator. We used the urea-mediated solution precipitation technique for biomineralization of hydrogels. The apatite grown on the surface and interior of the hydrogel was similar to biological apatites in the composition and crystalline structure. Powder x-ray diffraction (XRD) showed that the calcium phosphate crystalline platelets on hydrogels are preferentially aligned along the crystallographic c-axis direction. Inductively-coupled plasma mass spectroscopy (ICP-MS) analysis showed that the Ca/P molar ratio of apatites grown on the hydrogel template was found to be 1.60, which is identical to that of natural bones. In vitro cell experiments showed that the cell adhesion/proliferation on the mineralized hydrogel was more pronounced than on the pure polymer hydrogel.

scholarly journals Research of Mortar Containing Phosphorous Slag and Calcium Carbonate Nanoparticles

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Huashan Yang ◽  
Yujun Che
Keyword(s):  
Calcium Carbonate ◽  
Cementitious Materials ◽  
Sem Analysis ◽  
Strength Development ◽  
Early Age ◽  
Test Results ◽  
X Ray Diffraction ◽  
Negative Effects ◽  
X Ray ◽  
Phosphorous Slag

Ground phosphorous slag (PS) has not been widely used in construction due to its negative effects on the early-age performances of cementitious materials. The effects of calcium carbonate nanoparticles (NC) on strength development of mortar containing high content of PS were investigated at different curing ages. The NC was incorporated at 2% as partial mass replacements for binder. Hydration products and microstructure characterization was examined by X-ray diffraction (XRD), differential thermal gravity (DTG), thermogravimetric (TG), and scanning electron microscopy (SEM) analysis. Test results showed that NC improved both flexural and compressive strength of mortar containing high content of PS at 7, 28, 56, and 90 days. XRD, DTG-TG, and SEM analysis confirmed the filling effect of NC. Furthermore, the formation of the carboaluminate even at later age also improved the microstructure of mortar, which created a denser microstructure.

Preparation of Anti-Sperm Protein 17 Immunomagnetic Nanoparticles for Targeting Cell

2008 ◽  
Vol 8 (5) ◽  
pp. 2341-2346 ◽  
Author(s):  
Song Zhang ◽  
Yu Zhang ◽  
Jiwei Liu ◽  
Chunhua Zhang ◽  
Ning Gu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Human Sperm ◽  
Maghemite Nanoparticles ◽  
X Ray Diffraction ◽  
Poly Ethylene Glycol ◽  
Covalent Bonds ◽  
Sperm Protein ◽  
The Media ◽  
Poly Ethylene ◽  
Sperm Protein 17

Poly(ethylene glycol) was functionalized with carboxyl groups by esterification with succinic anhydride in the media of dioxane and pyridine as catalyst. Maghemite nanoparticles were synthesized by chemical coprecipitation and coated with carboxylated poly(ethylene glycol) to improve their biocompatibility. And the properties were characterized using Fourier transform infrared spectroscopy, Transmission electronic microscopy, X-ray diffraction, Zeta potential analyzer and Vibrating sample magnetometer. The immunomagnetic nanoparticles were obtained by grafting anti-sperm protein 17 monoclonal antibody onto the surface of carboxylated poly(ethylene glycol) coated maghemite nanoparticles by covalent bonds. After incubated with human sperm protein 17 gene transfected ovarian cancer HO8910 cells, the immunomagnetic nanoparticles were targeted successfully to the positive cells and no obviously non-specific adsorption occured. It is of significance to target to the cell successfully for diagnosis and therapy of ovarian carcinoma such as magnetic resonance imaging and magnetic hyperthermia.

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