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Camacho-Ramírez A, Meléndez-Zamudio M, Cervantes J, Palestino G, Guerra-Contreras A. One-step synthesis of amphiphilic copolymers PDMS- b-PEG using tris(pentafluorophenyl)borane and subsequent study of encapsulation and release of curcumin. J Mater Chem B 2024. [PMID: 38817163 DOI: 10.1039/d4tb00113c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
A series of amphiphilic block copolymer (BCP) micelles based on poly(dimethylsiloxane) (PDMS) and poly(ethylene glycol) (PEG) were synthesized by a one-step reaction in the presence of tris(pentafluorophenyl)borane (BCF) as a catalyst. The structural composition of PDMS-b-PEG (PR11) and PEG-b-PDMS-b-PEG (PR12) was corroborated by FTIR, 29Si NMR, and TGA. The BCPs were assembled in an aqueous solution, obtaining micelles between 57 and 87 nm in size. PR11 exhibited a higher (2.0 g L-1) critical micelle concentration (CMC) than PR12 (1.5 g L-1) due to the short chain length. The synthesized nano micelles were used to encapsulate curcumin, which is one of three compounds of turmeric plant 'Curcuma longa' with significant biological activities, including antioxidant, chemoprotective, antibacterial, anti-inflammatory, antiviral, and anti-depressant properties. The encapsulation efficiency of curcumin was 60% for PR11 and 45% for PR12. Regarding the release study, PR11 delivered 53% curcumin after five days under acidic conditions (pH of 1.2) compared to 43% at a pH of 7.4. The degradation products of curcumin were observed under basic conditions and were more stable at acidic pH. In both situations, the release process is carried out by breaking the silyl-ether bond, allowing the release of curcumin. PR11 showed prolonged release times, so it could be used to reduce ingestion times and simultaneously work as a nanocarrier for other hydrophobic drugs.
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Affiliation(s)
- Abygail Camacho-Ramírez
- Department of Chemistry, Division of Natural and Exact Sciences, University of Guanajuato, Noria Alta S/N, Col. Noria Alta, Guanajuato C.P., 36050, Guanajuato, Mexico.
| | - Miguel Meléndez-Zamudio
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, ON L8S 4M1, Canada
| | - Jorge Cervantes
- Department of Chemistry, Division of Natural and Exact Sciences, University of Guanajuato, Noria Alta S/N, Col. Noria Alta, Guanajuato C.P., 36050, Guanajuato, Mexico.
| | - Gabriela Palestino
- Biopolymers and Nanostructures Laboratory, Faculty of Chemical Sciences, Autonomous University of San Luis Potosí, S.L.P., C.P. 78210, Mexico
| | - Antonio Guerra-Contreras
- Department of Chemistry, Division of Natural and Exact Sciences, University of Guanajuato, Noria Alta S/N, Col. Noria Alta, Guanajuato C.P., 36050, Guanajuato, Mexico.
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Mossayebi Z, Jafari VF, Gurr PA, Simons R, Qiao GG. Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7454-7465. [PMID: 36708328 DOI: 10.1021/acsami.2c21500] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Ice build-up on solid surfaces causes significant economic losses for a range of industries. One solution to this problem is the development of coatings with low ice adhesion strength. Amphiphilic poly(ionic liquid) (PIL)-based surfaces have been recently reported for antifogging/antifrosting applications. However, they have possible anti-icing properties through lowering the ice adhesion strength that have yet to be reported. Herein, we designed well-defined triblock copolymers composed of a polydimethylsiloxane component coupled with PIL segments of poly([2 (methacryloyloxy)ethyl] trimethylammonium chloride) (PMETAC), which were subsequently UV-cured with an oligo(ethylene glycol) dimethacrylate (OEGDMA) cross-linker. The structure-property relationships of the resultant semi-interpenetrating polymer networks (SIPNs) were investigated by varying the counterion (i.e., trimethylammonium bis(trifluoromethanesulfonyl)imide (TFSI-)) and the content of the PIL segments and cross-linker. An ice adhesion strength as low as 13.3 ± 8.6 kPa was observed for the coating containing 12.5 wt % of PMETAC segment and 5 wt % of OEGDMA, which is one of the lowest values reported so far for the amphiphilic coatings. Characterization of the coatings in terms of surface features, wettability, and hydration states have enabled the elucidation of different deicing mechanisms. Self-lubrication due to the existence of nonfreezable bound water led to the obtained low ice adhesion strength. This work offers a new approach for the exploration of PIL-based icephobic coatings for practical applications.
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Affiliation(s)
- Zahra Mossayebi
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
- CSIRO Manufacturing, Melbourne, Victoria 3169, Australia
| | - Vianna F Jafari
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Paul A Gurr
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Ranya Simons
- CSIRO Manufacturing, Melbourne, Victoria 3169, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
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