scholarly journals Biopolymeric Delivery Systems for Cosmetic Applications Using Chlorella vulgaris Algae and Tea Tree Essential Oil

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2689
Author(s):  
Flávia P. Morais ◽  
Rogério M. S. Simões ◽  
Joana M. R. Curto
Keyword(s):  
Essential Oil ◽  
Delivery System ◽  
Chlorella Vulgaris ◽  
Crosslinking Agent ◽  
Nanofibrillated Cellulose ◽  
Polymeric Matrix ◽  
Tea Tree ◽  
3D Matrix ◽  
Support Matrix ◽  
Stable Matrix

Cosmetic products in which all the skincare compounds are biomolecules, biocompatible and biodegradable constitute a request of an educated consumer corresponding to a premium cosmetic segment. For this purpose, a cellulose-based delivery system was developed to retain biomolecules for dermic applications. The 3D matrix was built with microfibrillated cellulose, nanofibrillated cellulose and carboxymethylcellulose combined with a crosslinking agent, the alginate, to obtain a 3D matrix capable of retaining and releasing bioactive components of microalgae Chlorella vulgaris and tea tree essential oil. The porosity and pore dimensions and uniformity of this support matrix were optimized using 3D computational tools. The structures of the biopolymers were characterized using SEM, EDX, FTIR-ATR and DSC techniques. The essential oil and the microalgae components were successfully incorporated in a 3D stable matrix. The results indicate that the polymeric matrix retains and releases the essential oil biomolecules in a controlled way, when compared with tea tree essential oil, which is vaporized from 25 °C to 38 °C, without this 3D polymeric matrix. The microalgae and cellulose-based delivery system proved to be an interesting option for dermic and cosmetic applications because the exposure time of the therapeutic biomolecules was improved, and this factor consists of a competitive benefit for dermic systems.

scholarly journals Biopolymer based nanoemulsion delivery system: An effective approach to boost the antioxidant potential of essential oil in food products

2021 ◽  
Vol 2 ◽  
pp. 100082
Author(s):  
Abdur Rehman ◽  
Tong Qunyi ◽  
Hafiz Rizwan Sharif ◽  
Sameh A. Korma ◽  
Aiman Karim ◽  
...  
Keyword(s):  
Essential Oil ◽  
Delivery System ◽  
Food Products ◽  
Antioxidant Potential

scholarly journals Design and Gas Separation Performance of Imidazolium Poly(ILs) Containing Multivalent Imidazolium Fillers and Crosslinking Agents

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1388
Author(s):  
Kathryn E. O’Harra ◽  
Emily M. DeVriese ◽  
Erika M. Turflinger ◽  
Danielle M. Noll ◽  
Jason E. Bara
Keyword(s):  
Small Molecules ◽  
Crosslinking Agent ◽  
Gas Permeation ◽  
Polymeric Matrix ◽  
Separation Performance ◽  
Ionic Polymers ◽  
Co2 Solubility ◽  
Imidazolium Cations ◽  
Crosslinking Agents ◽  
Gas Separation Performance

This work introduces a series of vinyl-imidazolium-based polyelectrolyte composites, which were structurally modified via impregnation with multivalent imidazolium-benzene ionic liquids (ILs) or crosslinked with novel cationic crosslinkers which possess internal imidazolium cations and vinylimidazolium cations at the periphery. A set of eight [C4vim][Tf2N]-based membranes were prepared via UV-initiated free radical polymerization, including four composites containing di-, tri-, tetra-, and hexa-imidazolium benzene ILs and four crosslinked derivatives which utilized tri- and tetra- vinylimidazolium benzene crosslinking agents. Structural and functional characterizations were performed, and pure gas permeation data were collected to better understand the effects of “free” ILs dispersed in the polymeric matrix versus integrated ionic crosslinks on the transport behaviors of these thin films. These imidazolium PIL:IL composites exhibited moderately high CO2 permeabilities (~20–40 Barrer), a 4–7× increase relative to corresponding neat PIL, with excellent selectivities against N2 or CH4. The addition of imidazolium-benzene fillers with increased imidazolium content were shown to correspondingly enhance CO2 solubility (di- < tri- < tetra- < hexa-), with the [C4vim][Tf2N]: [Hexa(Im+)Benz ][Tf2N] composite showing the highest CO2 permeability (PCO2 = 38.4 Barrer), while maintaining modest selectivities (αCO2/CH4 = 20.2, αCO2/N2 = 23.6). Additionally, these metrics were similarly improved with the integration of more ionic content bonded to the polymeric matrix; increased PCO2 with increased wt% of the tri- and tetra-vinylimidazolium benzene crosslinking agent was observed. This study demonstrates the intriguing interactions and effects of ionic additives or crosslinkers within a PIL matrix, revealing the potential for the tuning of the properties and transport behaviors of ionic polymers using ionic liquid-inspired small molecules.

scholarly journals Blue Tansy Essential Oil: Chemical Composition, Repellent Activity Against Aedes aegypti and Attractant Activity for Ceratitis capitata

2021 ◽  
Vol 16 (2) ◽  
pp. 1934578X2199019 ◽  
Author(s):  
Iris Stappen ◽  
Juergen Wanner ◽  
Nurhayat Tabanca ◽  
Ulrich R. Bernier ◽  
Paul E. Kendra
Keyword(s):  
Essential Oil ◽  
Aedes Aegypti ◽  
Ceratitis Capitata ◽  
Stationary Phases ◽  
Management Strategies ◽  
Fruit Fly ◽  
Effective Dosage ◽  
Mosquito Vector ◽  
Tea Tree ◽  
Potential Applications

Blue tansy essential oil (BTEO) ( Tanacetum annuum L.) was analyzed by GC-MS and GC-FID using two different capillary column stationary phases. Sabinene (14.0%), camphor (13.6%), myrcene (8.0%), β-pinene (7.7%), and chamazulene (6.9%) were the main components using an SE52 column (non-polar). On a polar CW20M phase column, sabinene (15.1%), camphor (14.4%), α-phellandrene (7.9%), β-pinene (7.7%), and myrcene (6.9%) were the most abundant compounds. To assess the oil for potential applications in integrated pest management strategies, behavioral bioassays were conducted to test for repellency against yellow fever mosquito Aedes aegypti, and for attractant activity for Mediterranean fruit fly Ceratitis capitata. Results showed that BTEO was not effective in repelling Ae. aegypti (minimum effective dosage [MED]: 0.625 ± 0.109 mg/cm2 compared with the standard insect repellent DEET (N,N-diethyl-3-methylbenzamide). In assays with male C. capitata, BTEO displayed mild attraction compared with two positive controls (essential oils from tea tree Melaleuca alternifolia and African ginger bush Tetradenia riparia). Additional studies are needed to identify the specific attractant chemicals in BTEO and to determine if they confer a synergistic effect when combined with other known attractants for C. capitata. To the best of our knowledge, this study represents the first investigation of BTEO for repellency against the mosquito vector Ae. aegypti and for attractancy to C. capitata, a major agricultural pest worldwide.

scholarly journals Bioactivity and Chemical Composition of the Essential oil of Tea Tree (Melaleuca alternifolia)

2008 ◽  
Vol 18 (12) ◽  
pp. 1644-1650 ◽  
Author(s):  
Seun-Ah Yang ◽  
Sang-Kyung Jeon ◽  
Eun-Jung Lee ◽  
Nam-Kyung Im ◽  
Ji-Young Jung ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Melaleuca Alternifolia ◽  
Tea Tree
Sign in / Sign up

Export Citation Format

Share Document