1
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Ahmed S, Aziz DE, Sadek MA, Tawfik MA. Capped flexosomes for prominent anti-inflammatory activity: development, optimization, and ex vivo and in vivo assessments. Drug Deliv Transl Res 2024:10.1007/s13346-024-01522-z. [PMID: 38315262 DOI: 10.1007/s13346-024-01522-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/14/2024] [Indexed: 02/07/2024]
Abstract
This study aimed to formulate diacerein (DCN)-loaded flexosomes for enhanced efficacy against osteoarthritis. A 23 D-optimal design was employed, investigating the impact of surfactant type (A), surfactant concentration (%w/v) (B), and oleylamine amount (mg) (C). Flexosomes were formulated using a rotary evaporator, and Design-Expert® software was utilized to statistically analyze entrapment efficiency (EE%), zeta potential (ZP), poly-dispersity index (PDI), and particle size (PS) to determine the optimum formula. The selection criteria prioritized increased ZP (as absolute value) and EE%, coupled with decreased PDI and PS. Rigorous physicochemical, in vivo, and ex vivo tests were conducted to validate the safety, stability, and activity of the optimal formula. Physicochemical assessments encompassed pH measurement, transmission electron microscopy, differential scanning calorimetry, release profiles, storage effects, and Fourier transform infrared spectroscopy. In vivo tests included permeation studies, histopathology, anti-inflammatory activity, and skin irritancy, while ex vivo tests focused on permeation parameters and skin deposition. The optimum formula demonstrated high desirability (0.931), along with favorable EE% (90.93%), ZP (- 40.4 mV), particle size (188.55 nm), and sustained behavior. Notably, improved in vivo permeation (132 µm), skin deposition (193.43 µg/cm2), and antinociceptive activity (66%) compared to DCN suspension (48 µm, 66.31 µg/cm2, and 26%, respectively) were observed. The optimal formula also exhibited excellent safety and storage characteristics. In conclusion, DCN-loaded flexosomes exhibit significant potential for effectively managing osteoarthritis.
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Affiliation(s)
- Sadek Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt.
| | - Diana E Aziz
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt
| | - Mohamed A Sadek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Mai Ahmed Tawfik
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo, 11562, Egypt
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2
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Ahmed S, Amin MM, Sayed S. A comprehensive review on recent nanosystems for enhancing antifungal activity of fenticonazole nitrate from different routes of administration. Drug Deliv 2023; 30:2179129. [PMID: 36788709 PMCID: PMC9930819 DOI: 10.1080/10717544.2023.2179129] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
This review aims to comprehensively highlight the recent nanosystems enclosing Fenticonazole nitrate (FTN) and to compare between them regarding preparation techniques, studied factors and responses. Moreover, the optimum formulae were compared in terms of in vitro, ex vivo and in vivo studies in order to detect the best formula. FTN is a potent antifungal imidazole compound that had been used for treatment of many dangerous fungal infections affecting eye, skin or vagina. FTN had been incorporated in various innovative nanosystems in the recent years in order to achieve significant recovery such as olaminosomes, novasomes, cerosomes, terpesomes and trans-novasomes. These nanosystems were formulated by various techniques (ethanol injection or thin film hydration) utilizing different statistical designs (Box-Behnken, central composite, full factorial and D-optimal). Different factors were studied in each nanosystem regarding its composition as surfactant concentrations, surfactant type, amount of oleic acid, cholesterol, oleylamine, ceramide, sodium deoxycholate, terpene concentration and ethanol concentration. Numerous responses were studied such as percent entrapment efficiency (EE%), particle size (PS), poly-dispersity index (PDI), zeta potential (ZP), and in vitro drug release. Selection of the optimum formula was based on numerical optimization accomplished by Design-Expert® software taking in consideration the largest EE %, ZP (as absolute value) and in vitro drug release and lowest PS and PDI. In vitro comparisons were done employing different techniques such as Transmission electron microscopy, pH determination, effect of gamma sterilization, elasticity evaluation and docking study. In addition to, ex vivo permeation, in vivo irritancy test, histopathological, antifungal activity and Kinetic study.
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Affiliation(s)
- Sadek Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt,CONTACT Sadek Ahmed Faculty of Pharmacy, Cairo University, Cairo11562, Egypt
| | - Maha M. Amin
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Sinar Sayed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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3
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Ahmed S, Amin MM, El-Korany SM, Sayed S. Pronounced capping effect of olaminosomes as nanostructured platforms in ocular candidiasis management. Drug Deliv 2022; 29:2945-2958. [PMID: 36073061 PMCID: PMC9848414 DOI: 10.1080/10717544.2022.2120926] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The aim of this study was to formulate and boost ocular targeting of Fenticonazole Nitrate (FTN)-loaded olaminosomes in order to improve drug corneal permeation and candidiasis treatment. Olaminosomes were formulated by ethanol injection technique applying a central composite design. The independent variables were: span 80 amount (mg) (A), oleylamine concentration (mg%) (B) and oleic acid: drug ratio (C). The dependent responses were: percent entrapment efficiency (EE %), particle size (PS), poly-dispersity index (PDI), zeta potential (ZP) and in vitro drug release after 10 hours (Q10h). Numerical optimization by Design-Expert® software was adopted to select the optimum formula. This formula was chosen based on highest EE %, ZP (as absolute value) and Q10h and lowest PS and PDI. The optimum formula was subjected to further in vitro characterization via Differential scanning calorimetry, Transmission electron microscopy, Fourier transform infrared spectroscopy, pH determination, effect of storage, influence of terminal sterilization, detection of Minimal Inhibitory Concentration and ex vivo corneal penetration analysis. Safety and antifungal activity of the optimum formula were tested through various in vivo studies like ocular irritancy, corneal tolerance, corneal uptake and susceptibility test. The optimum formula with the maximum desirability value (0.972) revealed EE% (84.24%), PS (117.55 nm), ZP (-74.85 mV) and Q10h (91.26%) respectively. The optimum formula demonstrated ocular tolerance with enhanced corneal penetration behavior (428.66 µg/cm2) and boosted antifungal activity (56.13%) compared to FTN suspension (174.66 µg/cm2 and 30.83%). The previous results ensured the ability of olaminosomes to enhance the corneal penetration and antifungal efficacy of Fenticonazole Nitrate.
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Affiliation(s)
- Sadek Ahmed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt,CONTACT Sadek Ahmed Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini, Cairo11562, Egypt
| | - Maha M. Amin
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Sarah Mohamed El-Korany
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Sinar Sayed
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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4
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Kobzar Y, Fatyeyeva KY. A Simple Solvent-Free Strategy of Polybenzoxazine Film Elaboration with Controllable Performance via Molecular Weight Regulation between Cross-Linking Knots. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yaroslav Kobzar
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, Polymerès, Biopolymères, Surfaces (PBS), 76000Rouen, France
| | - Kateryna Yu. Fatyeyeva
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, Polymerès, Biopolymères, Surfaces (PBS), 76000Rouen, France
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5
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Erdeger M, Kiskan B, Gungor FS. Synthesis and characterization of pyrrole-based benzoxazine monomers and polymers. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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6
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Kumar A, Singh R, Tyagi YK. Design, synthesis and self-assembly of amide-linked dendron-based non-ionic amphiphiles. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022; 19:1167-1177. [DOI: 10.1007/s13738-021-02370-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/03/2021] [Indexed: 06/15/2023]
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7
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Guo T, Fan Y, Bo C, Qi Z, Tao H, Ziran C, Youhui X. Synthesis and properties of a benzoxazine monomer containing maleimide and biphenyl groups. HIGH PERFORM POLYM 2021. [DOI: 10.1177/0954008321996745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Benzoxazine resin exhibits excellent properties and is widely used in many fields. Herein, the synthesis of a novel compound, the bis(2,4-dihydro-2 H-3-(4- N-maleimido)phenyl-1,3-benzoxazinyl)biphenyl (BMIPBB), has been reported, which was synthesized by reacting N-(4-aminophenyl)maleimide (APMI), formaldehyde, and 4,4’-dihydroxybiphenyl. 1,3,5-three(4-(maleimido)phenyl)-1,3,5-triazine (TMIPT) was formed as an intermediate during the reaction. The proton nuclear magnetic resonance (1H-NMR) and Fourier transform-infrared (FTIR) spectroscopy experiments were conducted to determine the structure of BMIPBB. BMIPBB was obtained as a reddish-brown solid in 40.1% yield. The thermal properties of BMIPBB were investigated using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) techniques. Analysis of the DSC curves revealed that the broad peak representing the release of curing reaction heat appeared in the temperature range of 140–330°C. The peak temperature was 242.59°C and the heat of the reaction was 393.82 J/g, indicating that the rate of the curing reaction was low and the heat of the reaction was high. Analysis of the TGA results revealed that the weight loss rate was 5% at 110°C. The monomer exhibited a significant weight loss in the range of 320–500°C. The compound lost 50% of its weight at a temperature of 427°C.
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Affiliation(s)
- Tao Guo
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional, Molecules, College of Chemistry and Life Science, Chengdu Normal University, Sichuan Chengdu, China
| | - Yang Fan
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional, Molecules, College of Chemistry and Life Science, Chengdu Normal University, Sichuan Chengdu, China
| | - Chang Bo
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional, Molecules, College of Chemistry and Life Science, Chengdu Normal University, Sichuan Chengdu, China
| | - Zhang Qi
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional, Molecules, College of Chemistry and Life Science, Chengdu Normal University, Sichuan Chengdu, China
| | - Han Tao
- Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional, Molecules, College of Chemistry and Life Science, Chengdu Normal University, Sichuan Chengdu, China
| | - Chen Ziran
- Sichuan Vocational and Technical College, Sichuan Suining, China
| | - Xu Youhui
- Sichuan Vocational and Technical College, Sichuan Suining, China
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8
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Bayram K, Kiskan B, Yagci Y. Synthesis of thioamide containing polybenzoxazines by the Willgerodt–Kindler reaction. Polym Chem 2021. [DOI: 10.1039/d0py01381a] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Benzoxazines with thioamide linkages were successfully prepared by the Willgerodt–Kindler route.
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Affiliation(s)
- Kamer Bayram
- Istanbul Technical University
- Department of Chemistry
- Maslak
- Turkey
| | - Baris Kiskan
- Istanbul Technical University
- Department of Chemistry
- Maslak
- Turkey
| | - Yusuf Yagci
- Istanbul Technical University
- Department of Chemistry
- Maslak
- Turkey
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9
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Alahyaribeik S, Sharifi SD, Tabandeh F, Honarbakhsh S, Ghazanfari S. Stability and cytotoxicity of DPPH inhibitory peptides derived from biodegradation of chicken feather. Protein Expr Purif 2020; 177:105748. [PMID: 32911063 DOI: 10.1016/j.pep.2020.105748] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/27/2020] [Accepted: 09/02/2020] [Indexed: 11/18/2022]
Abstract
The antioxidant activity and cell viability of feather hydrolysates obtained with the Bacillus licheniformis were evaluated using an in-vitro model. The results indicate that feathers-derived peptides under 3 kDa have antioxidant activity with IC50 values of 5.03 ± 0.215 mg/mL by using DPPH antioxidant assay. Although the antioxidant activity of the peptides under 3 kDa preserved after applying diverse heating (from 20 to 100 °C), they lost their activity under strongly acidic or alkaline conditions. Antioxidant activity of the mixed feather bioactive peptides (MFBPs) obtained with partial purification of peptides under 3 kDa was with IC50 amount of 0.169 mg/mL ± 0.004 using DPPH radical scavenging assay. Also, MFBPs within an amount range of from 0.0048 to 5.0 mg/mL, illustrated no cytotoxicity to gingival fibroblast blood cell lines. In light of our results, the obtained value-added peptides could be useful in different food products as a future functional ingredient with antioxidant potency.
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Affiliation(s)
- Samira Alahyaribeik
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Tehran, Iran.
| | - Seyed Davood Sharifi
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Tehran, Iran.
| | - Fatemeh Tabandeh
- Industrial and Environmental Biotechnology Department, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
| | - Shirin Honarbakhsh
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Tehran, Iran.
| | - Shokoufe Ghazanfari
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Tehran, Iran.
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10
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Mei Q, Wang H, Tong D, Song J, Huang Z. A Novel Acetylene-Functional/Silicon-Containing Benzoxazine Resin: Preparation, Curing Kinetics and Thermal Properties. Polymers (Basel) 2020; 12:polym12050999. [PMID: 32357390 PMCID: PMC7284644 DOI: 10.3390/polym12050999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 04/18/2020] [Accepted: 04/20/2020] [Indexed: 12/12/2022] Open
Abstract
Benzoxazine resin has been paid more attention in the fields of aviation, electronics, automobiles and new energy industries because of its excellent comprehensive performance. Further application is limited, however, by shortcomings such as high brittleness and high curing temperature. Furthermore, higher thermal stability is imperiously demanded in special areas. Incorporating both an acetylene group and silicon into the benzoxazine monomer is a promising possible solution to improve the curing processability, thermal properties and toughness of benzoxazine. In this paper, an acetylene-functional/silicon-containing benzoxazine monomer was prepared by two-step synthesis, and acetylene-functional benzoxazine was also prepared as a comparison. FTIR and 1H NMR confirmed the molecular structure of acetylene-functional/silicon-containing benzoxazine. Differential scanning calorimetry (DSC) analysis showed that the initial and peak degradation temperatures of acetylene-functional/silicon-containing benzoxazine were decreased by 21 °C and 18 °C compared with acetylene-functional benzoxazine, respectively. The apparent activation energy of the curing reaction of acetylene-functional/silicon-containing benzoxazine was 83.1 kJ/mol, which was slightly lower than acetylene-functional benzoxazine (84.7 kJ/mol). TGA results showed that the acetylene-functional/silicon-containing benzoxazine had a higher thermal stability than acetylene-functional benzoxazine. The temperatures of 5% weight loss of acetylene-functional/silicon-containing benzoxazine were 380 °C in nitrogen and 485 °C in air, and the char yield at 1000 °C was 80% in nitrogen and 21% in air, respectively. The results of mechanical properties showed that the impact strength of acetylene-functional/silicon-containing benzoxazine was higher than acetylene-functional benzoxazine by 35.4%. The tensile and flexural strengths of acetylene-functional/silicon-containing benzoxazine were slightly higher than that of acetylene-functional benzoxazine.
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11
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Deliballi Z, Kiskan B, Yagci Y. Advanced Polymers from Simple Benzoxazines and Phenols by Ring-Opening Addition Reactions. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00225] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zeynep Deliballi
- Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
| | - Baris Kiskan
- Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
| | - Yusuf Yagci
- Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
- Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department, Faculty of Science, King Abdulaziz University, PO Box 80203, Jeddah 21589, Saudi Arabia
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12
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Alahyaribeik S, Ullah A. Methods of keratin extraction from poultry feathers and their effects on antioxidant activity of extracted keratin. Int J Biol Macromol 2020; 148:449-456. [DOI: 10.1016/j.ijbiomac.2020.01.144] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/12/2019] [Accepted: 01/15/2020] [Indexed: 10/25/2022]
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13
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Lu G, Dai J, Liu J, Tian S, Xu Y, Teng N, Liu X. A New Sight into Bio-Based Polybenzoxazine: From Tunable Thermal and Mechanical Properties to Excellent Marine Antifouling Performance. ACS OMEGA 2020; 5:3763-3773. [PMID: 32118193 PMCID: PMC7045792 DOI: 10.1021/acsomega.0c00025] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
With the rapid development of bio-based polymers, polybenzoxazine derived from renewable resources has been widely investigated. However, there are few reports on the functional application of bio-based polybenzoxazine based on the special chemical structures of renewable compounds. In this work, an easy approach to prepare the polybenzoxazines with varied thermomechanical properties and excellent marine antifouling performance from renewable resources is presented. After a variety of main-chain-type benzoxazine polymers (MCBPs) were synthesized from the renewable daidzein, furfurylamine, polyetheramine, and paraformaldehyde, their chemical structures were identified by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy (1H NMR). Then, their curing behaviors were monitored by differential scanning calorimetry and rheological tests. Results revealed that the cross-linked MCBPs with varied thermomechanical properties could be easily prepared by adjusting the molar ratio of polyetheramine and furfuramine. Notably, these cured MCBP films demonstrated excellent antibacterial and algaecidal properties due to the presence of daidzein and furan units. This work first presents the new application prospect of bio-based MCBPs, for example, in marine antifouling coatings.
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Affiliation(s)
- Guangming Lu
- School
of Marine Sciences, Ningbo University, Ningbo 315820, PR China
- Ningbo
Institute of Materials Technology and Engineering, Chinese Academy
of Sciences, Ningbo 315201, PR China
- Key
Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective
Technologies of Zhejiang Province, Ningbo 315201, PR China
| | - Jinyue Dai
- Ningbo
Institute of Materials Technology and Engineering, Chinese Academy
of Sciences, Ningbo 315201, PR China
| | - Jingkai Liu
- Ningbo
Institute of Materials Technology and Engineering, Chinese Academy
of Sciences, Ningbo 315201, PR China
| | - Shu Tian
- Ningbo
Institute of Materials Technology and Engineering, Chinese Academy
of Sciences, Ningbo 315201, PR China
| | - Yongjian Xu
- School
of Marine Sciences, Ningbo University, Ningbo 315820, PR China
| | - Na Teng
- Ningbo
Institute of Materials Technology and Engineering, Chinese Academy
of Sciences, Ningbo 315201, PR China
| | - Xiaoqing Liu
- Ningbo
Institute of Materials Technology and Engineering, Chinese Academy
of Sciences, Ningbo 315201, PR China
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14
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Affiliation(s)
- Baris Kiskan
- Istanbul Technical UniversityScience Literature Faculty, Department of Chemistry 34469, Maslak Istanbul Turkey
| | - Yusuf Yagci
- Istanbul Technical UniversityScience Literature Faculty, Department of Chemistry 34469, Maslak Istanbul Turkey
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15
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Gungor FS, Bati B, Kiskan B. Combining naphthoxazines and benzoxazines for non-symmetric curable oxazines by one-pot synthesis. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109352] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Chen S, Ren D, Li B, Li K, Chen L, Xu M, Liu X. Benzoxazine Containing Fluorinated Aromatic Ether Nitrile Linkage: Preparation, Curing Kinetics and Dielectric Properties. Polymers (Basel) 2019; 11:E1036. [PMID: 31212666 PMCID: PMC6631285 DOI: 10.3390/polym11061036] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/06/2019] [Accepted: 06/08/2019] [Indexed: 11/16/2022] Open
Abstract
Benzoxazine containing fluorinated aromatic ether nitrile linkage (FAEN-Bz) had been synthesized from 2,6-dichlorobenzonitrile, 4,4'-(hexafluoroisopropylidene)diphenol (bisphenol AF), 3-Aminophenol, formaldehyde, phenol by condensation polymerization and Mannich ring-forming reaction. Structures of the monomer were verified by Proton NMR spectrum (1H-NMR) and Fourier transform infrared spectroscopy (FTIR). Curing behaviors and curing kinetics of designed monomers were investigated and discussed. The activation energy was calculated and possible polymerization mechanisms were also proposed. Then, properties of cured polymers including crosslinking degrees, thermal decomposition, surface wettability and energy, and dielectric properties were studied and discussed. Additionally, programmed integral decomposition temperature (IPDT) was also used to evaluate the thermal stability of final polymers. Results indicated that the incorporation of benzoxazine and nitrile resulted in increased thermal stability and char yields. Moreover, the surface wettability and dielectric properties of poly(FAEN-Bz) can be easily controlled by tuning the curing temperatures and time.
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Affiliation(s)
- Sijing Chen
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Dengxun Ren
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Bo Li
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Kui Li
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Lin Chen
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Mingzhen Xu
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Xiaobo Liu
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
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17
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Akkus B, Kiskan B, Yagci Y. Combining polybenzoxazines and polybutadienes via simultaneous inverse and direct vulcanization for flexible and recyclable thermosets by polysulfide dynamic bonding. Polym Chem 2019. [DOI: 10.1039/c9py01056d] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Simultaneous inverse and direct vulcanization of a benzoxazine and a polybutadiene gave recyclable films through dynamic S–S bonding.
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Affiliation(s)
- Buket Akkus
- Istanbul Technical University
- Science and Literature Faculty
- Department of Chemistry
- Maslak
- Turkey
| | - Baris Kiskan
- Istanbul Technical University
- Science and Literature Faculty
- Department of Chemistry
- Maslak
- Turkey
| | - Yusuf Yagci
- Istanbul Technical University
- Science and Literature Faculty
- Department of Chemistry
- Maslak
- Turkey
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