Synthesis of Micro-Mesoporous Ti-MOR/Silica Composite Spheres in Oil-in-water Microemulsion System

2021 ◽  
Author(s):  
Hao Xu ◽  
Yanhong Wang ◽  
Rusi Peng ◽  
Jingang Jiang ◽  
Kun Zhang ◽  
...  
Keyword(s):  
Microemulsion System ◽  
Silica Composite ◽  
Oil In Water

scholarly journals Uji Stabilitas Sediaan Mikroemulsi Menggunakan Hidrolisat Pati (DE 35–40) Sebagai Stabilizer

2006 ◽  
Vol 3 (1) ◽  
pp. 8-21
Author(s):  
Mahdi Jufri ◽  
◽  
Effionora Anwar ◽  
Putri Margaining Utami
Keyword(s):  
Drug Delivery ◽  
Dosage Form ◽  
Tween 80 ◽  
Microemulsion System ◽  
Hydrophobic Drug ◽  
Dextrose Equivalent ◽  
Oil In Water ◽  
External Phase ◽  
The Stability ◽  
Made In

Various solubilization techniques have been developed to enhance the bioavailability of hydrophobic drugs. One of the solubilization techniques is preparation of microemulsion. Microemulsion is a potential carrier in drug delivery system because it has many advantageous characteristics. In this research, hydrophobic drug was made in a dosage form of oil in water (O/W) microemulsion using ketoprofen as a model and investigated the influence of adding starch hydrolisates with dextrose equivalent (DE) 35-40 in variety concentrations (0,0%; 1,5%; 2,0%; 2,5%) to the stability of this microemulsion system. This microemulsion consisted of isopropyl miritate as oil phase, tween 80 and lechitin as surfactants, ethanol as cosurfactant, propylene glycol as cosolvent, starch hydrolisates DE 35–40 as stabilizer, and water as external phase. The evaluation was stability test both phisically and chemically. The result showed that the stability of microemulsion system increased significantly by adding starch hydrolisates DE 35-40 at 2,5%.

scholarly journals Microemulsion-Based Solid Lipid Nanoparticles As Emulsion Stabilisers

2021 ◽  
Author(s):  
Elham H. Hazfi
Keyword(s):  
Solid Lipid Nanoparticles ◽  
Lipid Nanoparticles ◽  
Continuous Phase ◽  
Tween 20 ◽  
Microemulsion System ◽  
Solid Lipid ◽  
Oil In Water ◽  
Phase Crystal ◽  
Surface Active ◽  
Oil Water

The preparation and properties of water-in-oil (W/O) emulsions stabilised solely by adsorbed surface-active solid lipid nanoparticles (SLNs) at the oil-water interface were studied. Monostearin-based SLNs were prepared using food-grade micoremulsions as nanoscle 'reactors'. Hot oil-in-water (O/W) microemulsions (70°C) consisting of monostearin, Tween 20, ethanol and water were crash-cooled to 4°C to promote the liquid-solid transition of the monostearin and thus develop sub-micron solid lipid particles. SLNs obtained from the cooled microemulsions were partially stabilised with addition to lecithin (0.5% w/w) to the microemulsion system. With 2% (w/w) added monstearin, the W/O emulsion was stable for the 14 days of study. The microstructure of the emulsions revealed the presence of two stabilisation mechanisms, namely Pickering-type and continuous phase crystal network stabilisation, which both contributed to slowing dispersed droplet coalescence. Overall, this study demonstrated that surface-active SLNs developed using a microemulsion technique could effectively kinetically stabilise model W/O emulsions.

Preparation of High-Purity α-Alumina by Oil-in-Water Microemulsion

2011 ◽  
Vol 399-401 ◽  
pp. 673-676 ◽  
Author(s):  
Jing Jing Ma ◽  
Bo Lin Wu
Keyword(s):  
High Purity ◽  
Average Crystallite Size ◽  
Microemulsion System ◽  
Alumina Powder ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Step Size ◽  
Oil In Water ◽  
Diffraction Peaks ◽  
Mixed Oil

The main objective of this work was to prepare high purity α-alumina powder (α-Al2O3) by mixed oil-in-water microemulsion route. In this study α-alumina was prepared by quaternary microemulsion system (water/surfactant/co-surfactant/oil-phase). OP-10, alcohol and the mixed solution of cyclohexane and aluminium isopropoxide were used as surfactant, co-surfactant and oil-phase, respectively. After drying the amorphous precursor powder, α-alumina powder is obtained by sintering at 1200°C for 3-5h. The X-ray diffraction pattern shows the presence of alumina phase with crystal structure and the slow scan with step size 0.0170°/sec of selected diffraction peaks such as (113) has been recorded and calculated by Scherer’s formula. The average crystallite size is about 40nm.

Study on a novel oil-in-water-type microemulsion system of water/Triton X-100/Tween80/n-hexyl alcohol/n-octane

2009 ◽  
Vol 48 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Guorong Duan ◽  
Aimei Li ◽  
Xujie Yang ◽  
Lude Lu ◽  
Xin Wang
Keyword(s):  
Microemulsion System ◽  
Water Type ◽  
Oil In Water ◽  
Triton X

PREPARATION OF CUBE-SHAPED CdS NANOPARTICLES BY SONOCHEMICAL METHOD

2002 ◽  
Vol 01 (05n06) ◽  
pp. 437-441 ◽  
Author(s):  
HUI WANG ◽  
YINONG LU ◽  
JUNJIE ZHU
Keyword(s):  
Ultrasound Irradiation ◽  
Nucleation And Growth ◽  
Cds Nanoparticles ◽  
Microemulsion System ◽  
Sonochemical Method ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Oil In Water ◽  
Uv Visible

Cube-shaped CdS nanoparticles have been successfully prepared by a sonochemical method in an oil-in-water microemulsion. The product was characterized by using techniques including X-ray powder diffraction, high-resolution transmission electron microscopy, energy-dispersive X-ray analysis and UV-visible absorption spectroscopy. This microemulsion system in the presence of high-intensity ultrasound irradiation provides special conditions for the nucleation and growth of the CdS nanoparticles.

Mechanism involved in the dyeing of wool with an oil-in-water microemulsion system

2008 ◽  
Vol 110 (1) ◽  
pp. 156-162 ◽  
Author(s):  
Roshan Paul ◽  
Conxita Solans ◽  
Pilar Erra
Keyword(s):  
Microemulsion System ◽  
Oil In Water

scholarly journals Microemulsion-Based Solid Lipid Nanoparticles As Emulsion Stabilisers

2021 ◽  
Author(s):  
Elham H. Hazfi
Keyword(s):  
Solid Lipid Nanoparticles ◽  
Lipid Nanoparticles ◽  
Continuous Phase ◽  
Tween 20 ◽  
Microemulsion System ◽  
Solid Lipid ◽  
Oil In Water ◽  
Phase Crystal ◽  
Surface Active ◽  
Oil Water

The preparation and properties of water-in-oil (W/O) emulsions stabilised solely by adsorbed surface-active solid lipid nanoparticles (SLNs) at the oil-water interface were studied. Monostearin-based SLNs were prepared using food-grade micoremulsions as nanoscle 'reactors'. Hot oil-in-water (O/W) microemulsions (70°C) consisting of monostearin, Tween 20, ethanol and water were crash-cooled to 4°C to promote the liquid-solid transition of the monostearin and thus develop sub-micron solid lipid particles. SLNs obtained from the cooled microemulsions were partially stabilised with addition to lecithin (0.5% w/w) to the microemulsion system. With 2% (w/w) added monstearin, the W/O emulsion was stable for the 14 days of study. The microstructure of the emulsions revealed the presence of two stabilisation mechanisms, namely Pickering-type and continuous phase crystal network stabilisation, which both contributed to slowing dispersed droplet coalescence. Overall, this study demonstrated that surface-active SLNs developed using a microemulsion technique could effectively kinetically stabilise model W/O emulsions.

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