Phase Behavior of Polyglycerol Ester-Based Nanoemulsions

2021 ◽  
Vol 21 (12) ◽  
pp. 6188-6195
Author(s):  
Liang Gan ◽  
Dingyuan Cui ◽  
Nawab Ali ◽  
Qianjie Zhang ◽  
Dongmei Zhang ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Aqueous Medium ◽  
Caprylic Acid ◽  
Mineral Oil ◽  
Water Soluble ◽  
Diagram Method ◽  
Factors Affecting ◽  
Polyglycerol Ester ◽  
Oil In Water ◽  
Emulsifying Ability

Nanoemulsions were prepared using polyglycerol esters as emulsifiers. The effects of emulsifiers, oils, and polyols on the phase behavior of nanoemulsions were analyzed by phase diagram method using caprylic acid capric triglyceride (318), mineral oil, and squalane (Squ) as oils respectively. Various factors affecting the area of the oil-in-water (O/W) nanoemulsion were investigated. The results showed that hydrophilic polyglyceryl-4 laurate was beneficial to the formation of translucent nanoemulsions, while lipophilic polyglyceryl-4 oleate could synergize the emulsification performance and was more conducive to the formation of nanoemulsions; the type of oil could affect the emulsifying ability of the emulsifier. It was found that it was beneficial to form translucent nanoemulsion when caprylic acid capric triglyceride was adopted as oil. However, it was almost impossible to form translucent nanoemulsions when mineral oil and squalane were used as oils. The addition of water-soluble jojoba ester was beneficial to the formation of O/W emulsion. In addition, glycerin can improve the polarity of the aqueous medium, enhance the affinity between emulsifiers and aqueous medium, and help to form a translucent nanoemulsion.

scholarly journals Emulsion Formation and Stabilizing Properties of Olive Oil Cake Crude Extracts

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 633
Author(s):  
Firdaous Fainassi ◽  
Noamane Taarji ◽  
Fatiha Benkhalti ◽  
Abdellatif Hafidi ◽  
Marcos A. Neves ◽  
...  
Keyword(s):  
Olive Oil ◽  
Ethanol Extract ◽  
Active Components ◽  
Oil In Water ◽  
Surface Active ◽  
Ph Conditions ◽  
Oil Water ◽  
Surface Active Compounds ◽  
Ionizable Groups ◽  
Emulsifying Ability

The surface-active and emulsifying properties of crude aqueous ethanolic extracts from untreated olive oil cake (OOC) were investigated. OOC extracts contained important concentrations of surface-active components including proteins, saponins and polyphenols (1.2–2.8%, 7.8–9.5% and 0.7–4.5% (w/w), respectively) and reduced the interfacial tension by up to 46% (14.0 ± 0.2 mN m−1) at the oil–water interface. The emulsifying ability of OOC extracts was not correlated, however, with their interfacial activity or surface-active composition. Eighty percent aqueous ethanol extract produced the most stable oil-in-water (O/W) emulsions by high-pressure homogenization. The emulsions had average volume mean droplet diameters of approximately 0.4 µm and negative ζ-potentials of about -45 mV, and were stable for up to 1 month of storage at 5, 25 and 50 °C. They were sensitive, however, to acidic pH conditions (<5) and NaCl addition (≥25 mM), indicating that the main stabilization mechanism is electrostatic due to the presence of surface-active compounds with ionizable groups, such as saponins.

Conventional fluorophore-free dual pH- and thermo-responsive luminescent alternating copolymer

2016 ◽  
Vol 7 (45) ◽  
pp. 6895-6900 ◽  
Author(s):  
Biswajit Saha ◽  
Kamal Bauri ◽  
Arijit Bag ◽  
Pradip K. Ghorai ◽  
Priyadarsi De
Keyword(s):  
Aqueous Medium ◽  
Free Water ◽  
Water Soluble ◽  
Alternating Copolymer ◽  
Fluorescent Copolymer

Herein, we have designed and synthesized a novel traditional fluorophore-free water-soluble fluorescent copolymer based on a poly(maleimide-alt-styrene) skeleton, which responds to both pH and temperature in aqueous medium.

Pickering Emulsion Stabilized By Hydrophobically Modified Spherical Cellulose Nanocrystals With Special Response To pH

2021 ◽  
Author(s):  
Hui Dong ◽  
Yifei Jiang ◽  
Xia Li ◽  
Wenjia Han ◽  
Qijun Ding ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
High Strength ◽  
Rheological Characteristic ◽  
Low Viscosity ◽  
Hydrophobically Modified ◽  
Oil In Water ◽  
Mean Diameter ◽  
Octenyl Succinic Anhydride ◽  
The Fourier Transform ◽  
Emulsifying Ability

Abstract The aims of this study were to study the performance changes of S-CNCs (spherical cellulose nanocrystals) modified by OSA (octenyl succinic anhydride) stabilized Pickering oil-in-water (O/W) emulsions. The Fourier transform infrared (FTIR) spectroscopy and contact angle change of the MS-CNCs (modified spherical cellulose nanocrystals) prove the successful modification of OSA and the improvement of hydrophobicity. The effect of a series of MS-CNCs concentration on the volume mean diameter, emulsion ratio, stability and micro-rheological characteristic viscosity of the emulsion was studied. The results show that the emulsifying ability of the S-CNCs have been greatly improved. In addition, at a concentration of 10g/l, the volume mean diameter reaches the nanometer level (0.95 µm), and the emulsion ratio reaches 100%, while still maintaining its unique ultra-low viscosity characteristics. Furthermore, the emulsion still exhibits high-strength resistance to ionic strength, but exhibits unique responsiveness to pH (pH≤5) at special stages.

A ratiometric fluorogenic probe for the real-time detection of SO32−in aqueous medium: application in a cellulose paper based device and potential to sense SO32−in mitochondria

The Analyst ◽  
2018 ◽  
Vol 143 (1) ◽  
pp. 250-257 ◽  
Author(s):  
Soham Samanta ◽  
Senjuti Halder ◽  
Poulomi Dey ◽  
Utsab Manna ◽  
Aiyagari Ramesh ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Real Time ◽  
Water Soluble ◽  
Live Cells ◽  
The Real ◽  
Cellulose Paper ◽  
Fluorogenic Probe ◽  
Ratiometric Detection ◽  
Real Time Detection

A new water soluble and fluorogenic probe (L) that can demonstrate the specific ratiometric detection of a SO2derivative (SO32−) in 100% aqueous medium and live cells has been designed and synthesized.

Sign in / Sign up

Export Citation Format

Share Document