Preparation of Amorphous Nano-Sized Ni(OH)2 with the System of Tween-80/n-C4H9OH/c-C6H12

2011 ◽  
Vol 236-238 ◽  
pp. 3005-3008
Author(s):  
Chang Jiu Liu ◽  
Shi Juan Chen ◽  
Mei Rong Qi
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Nickel Sulfate ◽  
Tween 80 ◽  
Sulfate Solution ◽  
Emulsion System ◽  
System Optimum ◽  
Structural Morphology ◽  
Micro Emulsion ◽  
Maximum Content

In this paper, cathode material nickel hydroxide powder of MH-Ni battery was prepared through the method of micro emulsion deepfreeze deposition with the system of Tween-80/n-C4H9OH/c-C6H12/NiSO4 solution. By measurement of the maximum content of water of different micro-emulsion system, optimum system was determined. The effect of temprature, concentration and amount of nickel sulfate solution to the particle size of the sample powder was also discussed. The structural morphology of the sample powder were analyzed and measured by XRD, SAED, SEM, TEM and particle size distribution of the sample was also analyzed. The results showed that the sample was amorphous nano-sized particles, and the size distribution was wide.

scholarly journals EFFECTS OF SONICATION ON SIZE DISTRIBUTION AND ENTRAPMENT OF LYNESTRENOL TRANSFEROSOME

2020 ◽  
pp. 245-247
Author(s):  
ISKANDARSYAH ISKANDARSYAH ◽  
CAMELIA DWI PUTRI MASRIJAL ◽  
HARMITA HARMITA
Keyword(s):  
Drug Delivery ◽  
Particle Size ◽  
Size Distribution ◽  
Time Variation ◽  
Transdermal Drug Delivery ◽  
Entrapment Efficiency ◽  
Tween 80 ◽  
Sonication Time ◽  
Size Evaluation ◽  
Edge Activator

Objective: The aim of this study was to develop transferosome vesicles for the transdermal drug delivery of lynestrenol.Methods: The lynestrenol transferosome vesicle was made by encapsulating the drug in a variation of phosphatidylcholine and Tween 80 by the thinlayerhydration method. The resulting transferosome vesicles were modified with a time variation of 30, 60, 90, and 120 min, and sonication variationswere paused and not paused. Particle size evaluation, polydispersity (PDI), and entrapment efficiency (%EE) were carried out on the variation ofsonication time.Results: The evaluation results showed that sonication without pauses showed better %EE and particle size than sonication with pauses andincreasing concentration of Tween 80 (edge activator). The %EE increased, and particle size decreased with increasing sonication time; PDI of vesicleswas heterogeneous with increasing sonication time. The %EE in formulas F1 and F2 after 120 min was 73.06% and 76.06% (paused) and 80.40% and82.97% (without paused). The particle size of formula F1 and F2 after 120 min 575.4 nm and 471.6 nm (paused) and 524.1 nm and 434.7 nm (withoutpaused). The PDI formulas of F1 and F2 after 120 min were 0.69 and 0.763 (paused) and 0.84 and 0.59 (without paused).Conclusion: Based on the results of the transferosome vesicle characteristics, it was shown that the optimal vesicle composition for packaginglynestrenol was vesicles that were composed of phosphatidylcholine and Tween 80 without pauses and could potentially be used as a transdermaldrug delivery system.

Preparation Study of WO3 Nano-Powder with Micro Emulsion Method

2013 ◽  
Vol 721 ◽  
pp. 299-302 ◽  
Author(s):  
Xian Zhen Diao
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Spherical Shape ◽  
Raw Material ◽  
Emulsion System ◽  
Small Particle Size ◽  
Emulsion Method ◽  
X Ray ◽  
Nano Powder ◽  
Micro Emulsion

WO3 nano-powder was prepared by CTAB/n-buoh/octane/H2O micro emulsion system, Na2WO4 and hydrochloric acid as raw material. And the structure, size and topography of WO3 nano-powder were characterized with X-ray diffractometer, transmissive electron microscopy. The result showed:calcination temperatures and different reactant types affect WO3 characteristics evidently; In moisture content 8%, calcining temperature 400°C conditions, small particle size、distribution uniform and spherical shape WO3 nano powder with micro emulsion method is prepared.

scholarly journals Microemulsion Formulation of Combination of Virgin Coconut Oil and Rice Bran Oil for Hair Growth

2018 ◽  
Vol 23 (1) ◽  
pp. 40
Author(s):  
Wira Noviana Suhery ◽  
Mira Febrina ◽  
Ivone Permatasari
Keyword(s):  
Particle Size ◽  
Rice Bran ◽  
Hair Growth ◽  
Rice Bran Oil ◽  
Coconut Oil ◽  
Tween 80 ◽  
Growth Promoter ◽  
Virgin Coconut Oil ◽  
Micro Emulsion ◽  
Growth Activity

Research on micro emulsion formulation of combination of virgin coconut oil (VCO) and rice bran oil (RBO) as a hair growth promoter has been done. The purpose of this study was to formulate and produce the best formula that is physically stable and optimally promoting the hair growth by varying the content of VCO and RBO in the form of micro emulsions. These dosage formulations were prepared in three formulas using 45% tween 80 as surfactants and 20% glycerin as co surfactant i.e.: F,I containing a combination of VCO and RBO 1:1; FII (1:2) and FIII (2:1). Physical evaluation of the preparation was carried out for 8 weeks of storage which included organoleptic examination, pH, homogeneity, density, globule particle size, phase freeze thaw, and rabbit hair growth activity test for 18 days. Based on the results of the evaluation, it was found that the FI, FII and FIII micro emulsion formulations were physically stable for 8 weeks of storage with a pH ranging from 6.7 to 7.0, density of 1.085-1.088 g/mL, average globul particle size of FI (34.6 nm ), FII (54 nm) and FIII (68.8 nm). The best formulas is FIII for hair growth length of 1.26 cm for 18 days.

The Influence of Crystal Seeds on the Particle Size Distribution of Hydrolysis Product of Titanyl Sulfate

2011 ◽  
Vol 396-398 ◽  
pp. 2402-2405
Author(s):  
Qiao Hua ◽  
Lin Wu ◽  
De Lian Yi ◽  
Zhao Hui Ouyang ◽  
Jing Wang ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Hydrolysis Product ◽  
Sulfate Solution ◽  
Titanyl Sulfate ◽  
Sodium Hydroxide Concentration ◽  
Hydrolysis Method ◽  
Particle Size Analyzer ◽  
Preheating Temperature

The hydrolysis product was prepared by added-seed thermal hydrolysis method with industrial titanyl sulfate solution. The influences of some factors (such as preheating temperature, sodium hydroxide concentration and activity of seeds) on the particle size and particle size distribution (PSD) of hydrolysis product were studied. The product was characterized by particle size analyzer and filtering property test. The results showed that all these factors had great impacts on PSD of product and its filtering property, the narrowest coefficient of variation (C.V.) was 43.0% and the fewest filtering time was 311s. The optimal conditions were as follows: preheating temperature was 90°C; NaOH concentration was 8.0-8.5%; activity of crystal seeds was 100-140 mL.

Effects of Particle Size Distribution on Corrosion Rate of Carbon Steel in Soil

2020 ◽  
Vol 69 (4) ◽  
pp. 102-106
Author(s):  
Shota Ohki ◽  
Shingo Mineta ◽  
Mamoru Mizunuma ◽  
Soichi Oka ◽  
Masayuki Tsuda
Keyword(s):  
Particle Size ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Particle Size Distribution ◽  
Size Distribution

DENSE SPRAY CORRECTIONS FOR DIFFRACTION-BASED PARTICLE SIZE DISTRIBUTION MEASUREMENTS

1995 ◽  
Vol 5 (1) ◽  
pp. 75-87 ◽  
Author(s):  
Christine M. Woodall ◽  
James E. Peters ◽  
Richard O. Buckius
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution

Influence of Cementite Particle Size Distribution on Machinability and Tool Life of High Carbon Cr-bearing Steels

1998 ◽  
Vol 84 (5) ◽  
pp. 387-392 ◽  
Author(s):  
Takashi INOUE ◽  
Yuzo HOSOI ◽  
Koe NAKAJIMA ◽  
Hiroyuki TAKENAKA ◽  
Tomonori HANYUDA
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Tool Life ◽  
Cementite Particle ◽  
High Carbon ◽  
Bearing Steels
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