scholarly journals The effect of ethanol evaporation on the properties of inkjet produced liposomes

2020 ◽  
Vol 28 (1) ◽  
pp. 271-280 ◽  
Author(s):  
Ruba Bnyan ◽  
Laura Cesarini ◽  
Iftikhar Khan ◽  
Matt Roberts ◽  
Touraj Ehtezazi
Keyword(s):  
Ethanol Evaporation

scholarly journals Improving the Actuation Speed and Multi-Cyclic Actuation Characteristics of Silicone/Ethanol Soft Actuators

Actuators ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 62 ◽  
Author(s):  
Boxi Xia ◽  
Aslan Miriyev ◽  
Cesar Trujillo ◽  
Neil Chen ◽  
Mark Cartolano ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Short Term Memory ◽  
Conductive Filler ◽  
Thermally Driven ◽  
Thermally Conductive ◽  
Ethanol Evaporation ◽  
Long Short Term Memory ◽  
Soft Actuators ◽  
Robotic Applications ◽  
Soft Composite

The actuation of silicone/ethanol soft composite material-actuators is based on the phase change of ethanol upon heating, followed by the expansion of the whole composite, exhibiting high actuation stress and strain. However, the low thermal conductivity of silicone rubber hinders uniform heating throughout the material, creating overheated damaged areas in the silicone matrix and accelerating ethanol evaporation. This limits the actuation speed and the total number of operation cycles of these thermally-driven soft actuators. In this paper, we showed that adding 8 wt.% of diamond nanoparticle-based thermally conductive filler increases the thermal conductivity (from 0.190 W/mK to 0.212 W/mK), actuation speed and amount of operation cycles of silicone/ethanol actuators, while not affecting the mechanical properties. We performed multi-cyclic actuation tests and showed that the faster and longer operation of 8 wt.% filler material-actuators allows collecting enough reliable data for computational methods to model further actuation behavior. We successfully implemented a long short-term memory (LSTM) neural network model to predict the actuation force exerted in a uniform multi-cyclic actuation experiment. This work paves the way for a broader implementation of soft thermally-driven actuators in various robotic applications.

scholarly journals Citrus limon Extract Loaded in Vesicular Systems for the Protection of Oral Cavity

Medicines ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 108 ◽  
Author(s):  
Maria Manconi ◽  
Maria Manca ◽  
Carla Caddeo ◽  
Giorgia Sarais ◽  
Alessandra Palmieri ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Lactobacillus Acidophilus ◽  
Freeze Drying ◽  
Citrus Limon ◽  
Antibacterial Effects ◽  
Bacterial Proliferation ◽  
Freeze Dried ◽  
Ethanol Evaporation ◽  
Dried Extract

Background: The nanoincorporation of the extract of Citrus limon (L.) Osbeck var. pompia into liposomes was aimed at improving its antioxidant and antibacterial effects. Methods: The extract of the rind of Citrus limon (L.) Osbeck var. pompia was obtained by maceration in ethanol, evaporation, and freeze-drying. The extract phytochemical fingerprint was obtained by HPLC and mass spectrometry, and it was determined that gallic acid, neohesperidin, eriocitrin, and neoeriocitrin were the most abundant components. The freeze-dried extract was loaded in liposomes, glycerosomes, and penetration-enhancer-containing vesicles prepared with propylene glycol (PG-PEVs). Results: Capability of the vesicles of improving efficacy of the extract in counteracting oxidative stress was studied in vitro in keratinocytes, along with antimicrobial activity against planktonic cultures of Streptococcus mutans, Lactobacillus acidophilus, and Streptococcus sanguinis. Conclusion: Results showed that the vesicles, especially glycerosomes and PG-PEVs, prevented oxidative damage and cell death, and inhibited bacterial proliferation.

High‐Sulfur‐Content Graphene‐Based Composite through Ethanol Evaporation for High‐Energy Lithium‐Sulfur Battery

ChemSusChem ◽  
2019 ◽  
Vol 13 (6) ◽  
pp. 1593-1602 ◽  
Author(s):  
Lorenzo Carbone ◽  
Antonio Esau Del Rio Castillo ◽  
Jaya Kumar Panda ◽  
Giammarino Pugliese ◽  
Alice Scarpellini ◽  
...  
Keyword(s):  
Sulfur Content ◽  
High Energy ◽  
Lithium Sulfur Battery ◽  
High Sulfur Content ◽  
Ethanol Evaporation ◽  
Sulfur Battery ◽  
Lithium Sulfur

Silica aerogel/epoxy composites with preserved aerogel pores and low thermal conductivity

e-Polymers ◽  
2015 ◽  
Vol 15 (2) ◽  
pp. 111-117 ◽  
Author(s):  
Hyung Min Kim ◽  
Hyun Su Kim ◽  
Seong Yun Kim ◽  
Jae Ryoun Youn
Keyword(s):  
Thermal Conductivity ◽  
Water Glass ◽  
Epoxy Composite ◽  
Physical Factor ◽  
Silica Aerogels ◽  
Processing Method ◽  
Ethanol Evaporation ◽  
New Processing ◽  
Drying Conditions ◽  
The Relationship

AbstractThe thermal conductivity of aerogel/epoxy composite based on the inexpensive powder form of silica aerogels by using water glass under ambient drying conditions was evaluated to investigate the relationship between the internal structure and the thermal conductivity of the composite. A high thermal conductivity was obtained for the composite fabricated by the typical liquid epoxy processing because the pores of the aerogels became filled with the epoxy resin during the processing of the composite. A new processing method for preserving the aerogel pores was then developed using ethanol evaporation, which lowered the thermal conductivity of the composite. The lowest thermal conductivity of 0.04 W/m K was obtained for the composite containing the as-received aerogel of 75 vol% with preserved pores. The preserved aerogel pores in the composite were the most significant physical factor in determining the thermal conductivity of the composite.

scholarly journals Patterned Functional Arrays by Selective De-Wetting

2000 ◽  
Vol 628 ◽  
Author(s):  
Hongyou Fan ◽  
Dhaval Doshi ◽  
Yunfeng Lu ◽  
Gabriel P. Lopez ◽  
C. Jeffrey Brinker
Keyword(s):  
Homogeneous Solution ◽  
Dip Coating ◽  
Ph Sensitive ◽  
Film Deposition ◽  
Dye Molecules ◽  
Contact Printing ◽  
Ethanol Evaporation

ABSTRACTUsing a micro-Contact Printing (μ-CP) technique, substrates are prepared with patterns of hydrophilic, hydroxyl-terminated SAMs and hydrophobic methyl-terminated SAMs. Beginning with a homogeneous solution of silica, surfactant, ethanol, water, and functional silane, preferential ethanol evaporation during dip-coating, causes water enrichment and selective de-wetting of the hydrophobic SAMs. Correspondingly, film deposition occurs exclusively on the patterned hydrophilic SAMs. In addition, by co-condensation of tetrafunctional silanes (Si(OR)4) with tri-functional organosilanes ((RO)3Si(CH2)3NH2), we have selectively derived the silica framework with functional amine NH2 groups. A pH sensitive, micro-fluidic system was formed by further conjugation reactions with pH sensitive dye molecules.

scholarly journals Strategies to Enhance Propolis Ethanolic Extract’s Flavor for its Use as a Natural Preservative in Beef

2021 ◽  
Vol 9 (2) ◽  
pp. 521-532
Author(s):  
Carmenza Liliana López-Patiño ◽  
Cristina Arroqui ◽  
Sandra Horvitz ◽  
Paloma Vírseda
Keyword(s):  
Food Industry ◽  
Microbial Growth ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
Beef Quality ◽  
Promising Alternative ◽  
Natural Preservative ◽  
Propolis Extract ◽  
Starting Point ◽  
Ethanol Evaporation

Propolis is rich in bioactive compounds like phenols and flavonoids, which make it a promising alternative as a natural preservative. However, the use of propolis in the food industry is limited due to its strong, characteristic flavor. To overcome this problem, several strategies such as the combination with other ingredients or propolis microencapsulation have been studied. In this work, the addition of honeydew (no floral honey) to, and the elimination of the ethanol from, the propolis extract solution were used to mitigate this sensorial defect. Thus, the effect of these propolis solutions on beef quality during refrigerated storage were evaluated. Throughout storage, a decrease in the pH and the a*, indicative of microbial growth and oxidation, respectively, was observed in the control samples. Both deterioration processes were slowed down in the treated samples, demonstrating the antioxidant and antibacterial properties of the propolis and the honeydew. What is more, neither ethanol evaporation nor the addition of honeydew impaired the antimicrobial activity of the solutions, with the greatest microbial reductions observed in the former. With this solution, a reduction of 0.77 and 1.45 logarithmic units were observed for the mesophiles and the Enterobacteria, respectively. Finally, the propolis and honeydew solution presented the highest scores in all the sensory attributes analyzed. In conclusion, the strategies applied in this study were effective at enhancing propolis extract flavor whilst maintaining its antimicrobial and antioxidant properties. This could be a promising starting point for a wider use of propolis as a natural preservative in the food industry.

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