1
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Wang H, Hou W. Correlations of Surface Free Energy and Solubility Parameters with Dielectric Constant, Refractive Index, and Density for Liquids. J Phys Chem B 2024; 128:5489-5499. [PMID: 38777626 DOI: 10.1021/acs.jpcb.4c00581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
There should be some intrinsic correlations between the surface free energy (γ) and solubility (δ) parameters, called characteristic parameters here, of substances with their fundamental physical properties such as the refractive index (nD), relative dielectric constant (εr), and density (ρ) because they are all related to intermolecular interactions. Understanding the correlations between characteristic parameters and fundamental physical quantities is of great fundamental and practical importance. In the current work, possible relationships between the characteristic parameters (γ and δ) and the physical quantities (nD, εr, and ρ) were explored by a trial-and-error fitting method based on the data of 92 liquids (including 14 nonpolar, 37 polar, and 41 hydrogen-bonded liquids). The γ parameters include total (γt), dispersive (γd), and polar (γp) ones, and the δ parameters include the Hildebrand parameter (δt) and the Hansen-dispersive (δd), polar (δp), and hydrogen-bonded (δh) ones. For each characteristic parameter, its relationship with the physical quantities was established. The applicability of the so-obtained relationships was confirmed using the data of another 66 liquids as an external data set. The empirical relationships can be used to estimate the characteristic parameters of liquids from their easily measurable physical quantities.
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Affiliation(s)
- Hongfei Wang
- Key Laboratory for Colloid and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, P. R. China
| | - Wanguo Hou
- Key Laboratory for Colloid and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, P. R. China
- National Engineering Research Center for Colloidal Materials, Shandong University, Jinan 250100, P. R. China
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2
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Porras JD, Diaz IL, Perez LD. Synthesis of PEGylated amphiphilic block copolymers with pendant linoleic moieties by combining ring-opening polymerization and click chemistry. Biopolymers 2024:e23582. [PMID: 38680100 DOI: 10.1002/bip.23582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 04/09/2024] [Accepted: 04/16/2024] [Indexed: 05/01/2024]
Abstract
This study focused on synthesizing and characterizing PEGylated amphiphilic block copolymers with pendant linoleic acid (Lin) moieties as an alternative to enhance their potential in drug delivery applications. The synthesis involved a two-step process, starting with ring-opening polymerization of ε-caprolactone (CL) and propargylated cyclic carbonate (MCP) to obtain PEG-b-P(CL-co-MCP) copolymers, which were subsequently modified via click chemistry. Various reaction conditions were explored to improve the yield and efficiency of the click chemistry step. The use of anisole as a solvent, N-(3-azidopropyl)linoleamide as a substrate, and a reaction temperature of 60°C proved to be highly efficient, achieving nearly 100% conversion at a low catalyst concentration. The resulting copolymers exhibited controlled molecular weights and low polydispersity, confirming the successful synthesis. Furthermore, click chemistry allows for the attachment of Lin moieties to the copolymer, enhancing its hydrophobic character, as deduced from their significantly lower critical micelle concentration than that of traditional PEG-b-PCL systems, which is indicative of enhanced stability against dilution. The modified copolymers exhibited improved thermal stability, making them suitable for applications that require high processing temperatures. Dynamic light scattering and transmission electron microscopy confirmed the formation of micellar structures with sizes below 100 nm and minimal aggregate formation. Additionally, 1H NMR spectroscopy in deuterated water revealed the presence of core-shell micelles, which provided higher kinetic stability against dilution.
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Affiliation(s)
- Julian D Porras
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Bogotá, Colombia
| | - Ivonne L Diaz
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Bogotá, Colombia
| | - Leon D Perez
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Bogotá, Colombia
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3
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Teixeira BN, Anaya-Mancipe JM, Thiré RMSM. Evaluation of polycaprolactone nanofibers' spinnability using green solvent systems by solution blow spinning (SBS). NANOTECHNOLOGY 2023; 34:505707. [PMID: 37699360 DOI: 10.1088/1361-6528/acf8cd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/12/2023] [Indexed: 09/14/2023]
Abstract
Solution blow spinning (SBS) is a promising alternative to produce fibrous matrices for a wide range of applications, such as packaging and biomedical devices. Polycaprolactone (PCL) is a biodegradable polyester commonly used for spinning. The usual choices for producing PCL solutions include chlorinated solvents (CS), such as chloroform. However, the high toxicity of CS makes it difficult for biological and green applications. This work evaluates the influence of two less toxic solvents, acetic acid (AA) and acetone (Acet), and their mixtures (AA/Acet) on the properties of PCL fibers produced by SBS. The results showed that Acet does not cause degradation of the PCL chains, in opposition to AA. Furthermore, adding acetone to the acetic acid tended to preserve the size of PCL chains. It was not possible to produce fibers using PCL in 100% acetone. However, the AA/Acet mixture allowed the efficient production of PCL fibers. The proportion of Acet and AA in the mixture modulated the fiber morphology and orientation, making it possible to use this green solvent system according to the desired application.
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Affiliation(s)
- Bruna N Teixeira
- Metallurgical and Materials Engineering Program (PEMM)/COPPE, Universidade Federal do Rio de Janeiro-UFRJ, 21941-598 Rio de Janeiro, Brazil
| | - Javier M Anaya-Mancipe
- Metallurgical and Materials Engineering Program (PEMM)/COPPE, Universidade Federal do Rio de Janeiro-UFRJ, 21941-598 Rio de Janeiro, Brazil
| | - Rossana Mara S M Thiré
- Metallurgical and Materials Engineering Program (PEMM)/COPPE, Universidade Federal do Rio de Janeiro-UFRJ, 21941-598 Rio de Janeiro, Brazil
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4
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Glass P, Shar A, Pemberton C, Nguyen E, Park SH, Joung D. 3D-Printed Artificial Cilia Arrays: A Versatile Tool for Customizable Mechanosensing. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303164. [PMID: 37483144 PMCID: PMC10502633 DOI: 10.1002/advs.202303164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Indexed: 07/25/2023]
Abstract
Bio-inspired cilium-based mechanosensors offer a high level of responsiveness, making them suitable for a wide range of industrial, environmental, and biomedical applications. Despite great promise, the development of sensors with multifunctionality, scalability, customizability, and sensing linearity presents challenges due to the complex sensing mechanisms and fabrication methods involved. To this end, high-aspect-ratio polycaprolactone/graphene cilia structures with high conductivity, and facile fabrication are employed to address these challenges. For these 3D-printed structures, an "inter-cilium contact" sensing mechanism that enables the sensor to function akin to an on-off switch, significantly enhancing sensitivity and reducing ambiguity in detection, is proposed. The cilia structures exhibit high levels of customizability, including thickness, height, spacing, and arrangement, while maintaining mechanical robustness. The simplicity of the sensor design enables highly sensitive detection in diverse applications, encompassing airflow and water flow monitoring, braille detection, and debris recognition. Overall, the unique conductive cilia-based sensing mechanism that is proposed brings several advantages, advancing the development of multi-sensing capabilities and flexible electronic skin applications in smart robotics and human prosthetics.
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Affiliation(s)
- Phillip Glass
- Department of PhysicsVirginia Commonwealth UniversityRichmondVA23284USA
| | - Andy Shar
- Department of PhysicsVirginia Commonwealth UniversityRichmondVA23284USA
| | - Charles Pemberton
- Department of PhysicsVirginia Commonwealth UniversityRichmondVA23284USA
| | - Ethan Nguyen
- Department of PhysicsVirginia Commonwealth UniversityRichmondVA23284USA
| | - Sung Hyun Park
- Sustainable Technology and Wellness R&D GroupKorea Institute of Industrial Technology (KITECH)Jeju‐siJeju‐do63243Republic of Korea
| | - Daeha Joung
- Department of PhysicsVirginia Commonwealth UniversityRichmondVA23284USA
- Massey Cancer CenterVirginia Commonwealth UniversityRichmondVA23298USA
- Institute for Sustainable Energy and EnvironmentVirginia Commonwealth UniversityRichmondVA23284USA
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Sterle Zorec B, Dreu R. Development of Simvastatin-Loaded Particles Using Spray Drying Method for Ex Tempore Preparation of Cartridges for 2D Printing Technology. Pharmaceutics 2023; 15:2221. [PMID: 37765190 PMCID: PMC10537374 DOI: 10.3390/pharmaceutics15092221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/21/2023] [Accepted: 08/26/2023] [Indexed: 09/29/2023] Open
Abstract
In this work, a spray drying method was developed to produce drug/polymer (simvastatin/polycaprolactone) microparticles that have the potential to be used as a pre-formulation for ex tempore preparation of 2D printing cartridges. An experimental model was designed with the process parameters set to predict the smallest particle size required for successful 2D printing. Three different types of particles (lactose, nanocellulose/lactose, calcium silicate) were produced, and the average size of the dry particles varied depending on the sampling location (cyclone, collection vessel). The encapsulation efficiency of simvastatin was highest with nanocellulose/lactose from the collection vessel. The one-month stability of simvastatin in the particles showed low content, but the addition of ascorbic acid as an antioxidant increased the chemical stability of the drug. Interestingly, the addition of antioxidants decreased the stability of simvastatin in the calcium silicate particles from the collection vessel. Dispersion of the particles in three different propylene glycol and water mixtures (10/90, 50/50, and 90/10% (v/v)), representing a printable ink medium with three different viscosity and surface tension properties, showed that nanocellulose/lactose was the most suitable antiadhesive in terms of dispersed particle size (˂1 µm). After one month of storage, the dispersed particles remained in the same size range without undesirable particle agglomeration.
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Affiliation(s)
- Barbara Sterle Zorec
- Faculty of Pharmacy, University of Ljubljana, Aškerčeva Cesta 7, SI-1000 Ljubljana, Slovenia;
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Ricci C, Azimi B, Panariello L, Antognoli B, Cecchini B, Rovelli R, Rustembek M, Cinelli P, Milazzo M, Danti S, Lazzeri A. Assessment of Electrospun Poly(ε-caprolactone) and Poly(lactic acid) Fiber Scaffolds to Generate 3D In Vitro Models of Colorectal Adenocarcinoma: A Preliminary Study. Int J Mol Sci 2023; 24:ijms24119443. [PMID: 37298394 DOI: 10.3390/ijms24119443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/16/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
Three-dimensional scaffold-based culture has been increasingly gaining influence in oncology as a therapeutic strategy for tumors with a high relapse percentage. This study aims to evaluate electrospun poly(ε-caprolactone) (PCL) and poly(lactic acid) (PLA) scaffolds to create a 3D model of colorectal adenocarcinoma. Specifically, the physico-mechanical and morphological properties of PCL and PLA electrospun fiber meshes collected at different drum velocities, i.e., 500 rpm, 1000 rpm and 2500 rpm, were assessed. Fiber size, mesh porosity, pore size distribution, water contact angle and tensile mechanical properties were investigated. Caco-2 cells were cultured on the produced PCL and PLA scaffolds for 7 days, demonstrating good cell viability and metabolic activity in all the scaffolds. A cross-analysis of the cell-scaffold interactions with morphological, mechanical and surface characterizations of the different electrospun fiber meshes was carried out, showing an opposite trend of cell metabolic activity in PLA and PCL scaffolds regardless of the fiber alignment, which increased in PLA and decreased in PCL. The best samples for Caco-2 cell culture were PCL500 (randomly oriented fibers) and PLA2500 (aligned fibers). Caco-2 cells had the highest metabolic activity in these scaffolds, with Young's moduli in the range of 8.6-21.9 MPa. PCL500 showed Young's modulus and strain at break close to those of the large intestine. Advancements in 3D in vitro models of colorectal adenocarcinoma could move forward the development of therapies for this cancer.
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Affiliation(s)
- Claudio Ricci
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Bahareh Azimi
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Luca Panariello
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Benedetta Antognoli
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Beatrice Cecchini
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Roberta Rovelli
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Meruyert Rustembek
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
| | - Patrizia Cinelli
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
- Centre for Instrumentation Sharing of University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy
| | - Mario Milazzo
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
- Centre for Instrumentation Sharing of University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy
| | - Serena Danti
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
- Centre for Instrumentation Sharing of University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy
| | - Andrea Lazzeri
- Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56126 Pisa, Italy
- Centre for Instrumentation Sharing of University of Pisa (CISUP), Lungarno Pacinotti 43/44, 56126 Pisa, Italy
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Woodring RN, Gurysh EG, Bachelder EM, Ainslie KM. Drug Delivery Systems for Localized Cancer Combination Therapy. ACS APPLIED BIO MATERIALS 2023; 6:934-950. [PMID: 36791273 PMCID: PMC10373430 DOI: 10.1021/acsabm.2c00973] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
With over 2 million cancer cases and over 600,000 cancer-associated deaths predicted in the U.S. for 2022, this life-debilitating disease continuously impacts the lives of people across the nation every day. Therapeutic treatment options for cancer have historically involved chemotherapies to eradicate tumors with cytotoxic mechanisms which can negatively affect the efficacy versus toxicity ratio of treatment. With a need for more directed and therapeutically active options, targeted small-molecule inhibitors and immunotherapies have since emerged to mitigate treatment-associated toxicities. However, aggressive tumors can employ a wide range of defense mechanisms to evade monotherapy treatment altogether, resulting in the recurrence of therapeutically resistant tumors. Therefore, many clinical routines have included combination therapy in which anticancer agents are combined to provide a synergistic attack on tumors. Even with this approach, maximizing the efficacy of cancer treatment is contingent upon the dose of drug that reaches the site of the tumor, so often therapy is administered at the site of a tumor via localized delivery platforms. Commonly used platforms for localized drug delivery include polymeric wafers, nanofibrous scaffolds, and hydrogels where drug combinations can be loaded and delivered synchronously. Attaining synergistic activity from these localized systems is dependent on proper material selection and fabrication methods. Herein, we describe these important considerations for enhancing the efficacy of cancer combination therapy through biodegradable, localized delivery systems.
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Affiliation(s)
- Ryan N. Woodring
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Elizabeth G. Gurysh
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Eric M. Bachelder
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kristy M. Ainslie
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC 27599, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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A novel multi-triggered reversible shape memory thermoplastic polyurethane (TPU)/polycaprolactone (PCL) blend. JOURNAL OF POLYMER RESEARCH 2023. [DOI: 10.1007/s10965-022-03420-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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9
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Rabiei N, Kish MH. Aminolysis of polyesters for cracking and structure clarifying: A review. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Navid Rabiei
- Department of Textile Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran Iran
| | - Mohammad Haghighat Kish
- Department of Textile Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran Iran
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El Jundi A, Mayor M, Folgado E, Gomri C, Benkhaled BT, Chaix A, Verdie P, Nottelet B, Semsarilar M. Peptide-guided self-assembly of polyethylene glycol-b-poly(ε-caprolactone-g-peptide) block copolymers. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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11
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Wang C, Luan W, Zeng Z, He X, Liu Z, Wang JH. Synthesis, solvent interactions and Hansen solubility parameters of polyvinyl butyral. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04366-0] [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]
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12
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Utroša P, Gradišar Š, Onder OC, Žagar E, Pahovnik D. Synthetic Polypeptide–Polyester PolyHIPEs Prepared by Thiol–Ene Photopolymerization. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Petra Utroša
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Špela Gradišar
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Ozgun Can Onder
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - Ema Žagar
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
| | - David Pahovnik
- Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
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Du MX, Yuan YF, Zhang JM, Liu CY. Hydrogen-Bonding Interactions in Polymer–Organic Solvent Mixtures. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ming-Xuan Du
- CAS Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 10049, China
| | - Ya-Fei Yuan
- CAS Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 10049, China
| | - Jin-Ming Zhang
- CAS Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
| | - Chen-Yang Liu
- CAS Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 10049, China
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Preparation and characterization of steroid and umbelliferone-based hetero-bifunctional poly(ε-caprolactone)s for potential drug delivery systems: antimicrobial and anticancer activities. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03059-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Manholi S, Athiyanathil S. Poly (ε‐caprolactone)‐based porous membranes for filtration applications—effect of solvents on precipitation kinetics, performance, and morphology. J Appl Polym Sci 2022. [DOI: 10.1002/app.51720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Smitha Manholi
- Materials Research Laboratory, Department of Chemistry National Institute of Technology Calicut Calicut India
| | - Sujith Athiyanathil
- Materials Research Laboratory, Department of Chemistry National Institute of Technology Calicut Calicut India
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Mirhosseini MM, Haddadi-Asl V, Khordad R. Molecular dynamics simulation, synthesis and characterization of polyurethane block polymers containing PTHF/PCL mixture as a soft segment. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03615-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Lavino AD, Ferrari M, Barresi AA, Marchisio D. Effect of different good solvents in flash nano-precipitation via multi-scale population balance modeling-CFD coupling approach. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116833] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Montoya Y, Cardenas J, Bustamante J, Valencia R. Effect of sequential electrospinning and co-electrospinning on morphological and fluid mechanical wall properties of polycaprolactone and bovine gelatin scaffolds, for potential use in small diameter vascular grafts. Biomater Res 2021; 25:38. [PMID: 34801087 PMCID: PMC8605505 DOI: 10.1186/s40824-021-00240-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 10/25/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Nowadays, the engineering vascular grafts with a diameter less than 6 mm by means of electrospinning, is an attracted alternative technique to create different three-dimensional microenvironments with appropriate physicochemical properties to promote the nutrient transport and to enable the bioactivity, dynamic growth and differentiation of cells. Although the performance of a well-designed porous wall is key for these functional requirements maintaining the mechanical function, yet predicting the flow rate and cellular transport are still not widely understood and many questions remain open about new configurations of wall can be used for modifying the conventional electrospun samples. The aim of the present study was to evaluate the effect of fabrication techniques on scaffolds composed of bovine gelatin and polycaprolactone (PCL) developed by sequential electrospinning and co-electrospinning, on the morphology and fluid-mechanical properties of the porous wall. METHODOLOGY For this purpose, small diameter tubular structures were manufactured and experimental tests were performed to characterize the crystallinity, morphology, wettability, permeability, degradability, and mechanical properties. Some samples were cross-linked with Glutaraldehyde (GA) to improve the stability of the gelatin fiber. In addition, it was analyzed how the characteristics of the scaffold favored the levels of cell adhesion and proliferation in an in vitro model of 3T3 fibroblasts in incubation periods of 24, 48 and 72 h. RESULTS It was found that in terms of the morphology of tubular scaffolds, the co-electrospun samples had a better alignment with higher values of fiber diameters and apparent pore area than the sequential samples. The static permeability was more significant in the sequential scaffolds and the hydrophilic was higher in the co-electrospun samples. Therefore, the gelatin mass losses were less in the co-electrospun samples, which promote cellular functions. In terms of mechanical properties, no significant differences were observed for different types of samples. CONCLUSION This research concluded that the tubular scaffolds generated by sequential and co-electrospinning with modification in the microarchitecture could be used as a vascular graft, as they have better permeability and wettability, interconnected pores, and a circumferential tensile strength similar to native vessel compared to the commercial graft analyzed.
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Affiliation(s)
- Yuliet Montoya
- Grupo de Dinámica Cardiovascular, Centro de Bioingeniería, Universidad Pontificia Bolivariana, Medellín, Colombia
- Comité de Trabajo de Bioingeniería Cardiovascular, Sociedad Colombiana de Cardiología y Cirugía Cardiovascular, Bogotá, Colombia
| | - José Cardenas
- Grupo de Automática y Diseño A+D, Universidad Pontificia Bolivariana, Medellín, Colombia
- Grupo de Dinámica Cardiovascular, Centro de Bioingeniería, Universidad Pontificia Bolivariana, Medellín, Colombia
| | - John Bustamante
- Grupo de Dinámica Cardiovascular, Centro de Bioingeniería, Universidad Pontificia Bolivariana, Medellín, Colombia
- Comité de Trabajo de Bioingeniería Cardiovascular, Sociedad Colombiana de Cardiología y Cirugía Cardiovascular, Bogotá, Colombia
| | - Raúl Valencia
- Grupo de Automática y Diseño A+D, Universidad Pontificia Bolivariana, Medellín, Colombia.
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20
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Liu J, Du X, Chen S. A Phase Inversion‐Based Microfluidic Fabrication of Helical Microfibers towards Versatile Artificial Abdominal Skin. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ji‐Dong Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing Tech University Nanjing 210009 P. R. China
| | - Xiang‐Yun Du
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing Tech University Nanjing 210009 P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials Nanjing Tech University Nanjing 210009 P. R. China
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Liu JD, Du XY, Chen S. A Phase Inversion-Based Microfluidic Fabrication of Helical Microfibers towards Versatile Artificial Abdominal Skin. Angew Chem Int Ed Engl 2021; 60:25089-25096. [PMID: 34505753 DOI: 10.1002/anie.202110888] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/03/2021] [Indexed: 12/26/2022]
Abstract
Microfluidic spinning technology (MST), incorporating microfluidics with chemical reactions, has gained considerable interest for constructing anisotropic advanced microfibers, especially helical microfibers. However, these efforts suffer from the limited material choices, restricting their applications. Here, a new phase inversion-based microfluidic spinning (PIMS) method is proposed for producing helical microfibers. This method undergoes a physicochemical phase inversion process, which is capable of efficiently manufacturing strong (tensile stress of more than 25 MPa), stretchable, flexible and biocompatible helical microfibers. The helical microfibers can be used to fabricate bi-oriented stretchable artificial abdominal skin, preventing incisional hernia formation and promoting the wound healing without conglutination. This research not only offers a universal approach to design helical microfibers but also provides a new insight into artificial skin.
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Affiliation(s)
- Ji-Dong Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Xiang-Yun Du
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
| | - Su Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, vJiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials, Nanjing Tech University, Nanjing, 210009, P. R. China
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22
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Silva DF, Lima KT, Bastos GNT, Oliveira JAR, do Nascimento LAS, Costa CEF, Filho GNR, Concha VOC, Passos MF. PCL/Andiroba Oil ( Carapa guianensis Aubl.) Hybrid Film for Wound Healing Applications. Polymers (Basel) 2021; 13:1591. [PMID: 34069314 PMCID: PMC8157046 DOI: 10.3390/polym13101591] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/04/2021] [Accepted: 03/13/2021] [Indexed: 11/23/2022] Open
Abstract
Developing a biomimetic material to wound care is an emerging need for the healing process. Poly (ε-caprolactone) (PCL) is a polymer with the necessary dressing's requirements often used in medicine. Their surface, physic-chemical and biological properties can be modified by adding bioactive compounds, such as andiroba seed oil (Carapa guianensis). This Amazonian natural plant has medicinal and pharmacological properties. For this purpose, PCL polymeric films incorporated with andiroba oil were investigated. The synthesis of hybrids materials was carried out in the solvent casting method. Thermal properties were evaluated using thermogravimetric analysis (TGA/DTGA) and differential scanning calorimetry (DSC). The solvent type on the surface and hydrophilicity of samples was studied using a scanning electron microscope (SEM). Additionally, contact angle measurements, functional groups analysis, fluid absorption capacity, and cell viability were performed. The results demonstrated the influences of andiroba oil under the morphology and thermal properties of the polymeric matrix; the hydrophilicity of the hybrid film obtained by acetic acid was reduced by 13%; the porosity decreased as the concentration of oil increased, but its higher thermal stability. The L929 cell line's proliferation was observed in all materials, and it presented nontoxic nature. It was demonstrated the ability of PCL hybrid film as a matrix for cell growth. Then, the materials were proved potential candidates for biomedical applications.
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Affiliation(s)
- Debora F. Silva
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Klinsmann T. Lima
- Laboratory of Neuroinflammation, Federal University of Pará, Belém 66075-110, PA, Brazil; (K.T.L.); (G.N.T.B.)
| | - Gilmara N. T. Bastos
- Laboratory of Neuroinflammation, Federal University of Pará, Belém 66075-110, PA, Brazil; (K.T.L.); (G.N.T.B.)
| | | | - Luís Adriano S. do Nascimento
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Carlos Emmerson F. Costa
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Geraldo N. R. Filho
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
| | - Viktor O. C. Concha
- Department of Chemical Engineering, Federal University of São Paulo, Diadema 09913-030, SP, Brazil;
| | - Marcele F. Passos
- Laboratory of Oils of the Amazon, Federal University of Pará, Belém 66075-750, PA, Brazil; (D.F.S.); (L.A.S.d.N.); (C.E.F.C.); (G.N.R.F.)
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23
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Shortening of electrospun PLLA fibers by ultrasonication. Micron 2021; 145:103066. [PMID: 33848781 DOI: 10.1016/j.micron.2021.103066] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/29/2021] [Accepted: 03/29/2021] [Indexed: 01/08/2023]
Abstract
This research work is aimed at studying the effect of ultrasounds on the effectiveness of fiber fragmentation by taking into account the type of sonication medium, processing time, and various PLLA molecular weights. Fragmentation was followed by an appropriate filtration in order to decrease fibers length distribution. It was evidenced by fiber length determination using SEM that the fibers are shortened after ultrasonic treatment, and the effectiveness of shortening depends on the two out of three investigated parameters, mostly on the sonication medium, and processing time. The gel permeation chromatography (GPC) confirmed that such ultrasonic treatment does not change the polymers' molecular weight. Our results allowed to optimize the ultrasonic fragmentation procedure of electrospun fibers while preliminary viscosity measurements of fibers loaded into hydrogel confirmed their potential in further use as fillers for injectable hydrogels for regenerative medicine applications.
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24
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Ng JS, Hashimoto M. 3D-PAD: Paper-Based Analytical Devices with Integrated Three-Dimensional Features. BIOSENSORS 2021; 11:84. [PMID: 33802637 PMCID: PMC8002416 DOI: 10.3390/bios11030084] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/14/2021] [Accepted: 02/16/2021] [Indexed: 11/16/2022]
Abstract
This paper describes the use of fused deposition modeling (FDM) printing to fabricate paper-based analytical devices (PAD) with three-dimensional (3D) features, which is termed as 3D-PAD. Material depositions followed by heat reflow is a standard approach for the fabrication of PAD. Such devices are primarily two-dimensional (2D) and can hold only a limited amount of liquid samples in the device. This constraint can pose problems when the sample consists of organic solvents that have low interfacial energies with the hydrophobic barriers. To overcome this limitation, we developed a method to fabricate PAD integrated with 3D features (vertical walls as an example) by FDM 3D printing. 3D-PADs were fabricated using two types of thermoplastics. One thermoplastic had a low melting point that formed hydrophobic barriers upon penetration, and another thermoplastic had a high melting point that maintained 3D features on the filter paper without reflowing. We used polycaprolactone (PCL) for the former, and polylactic acid (PLA) for the latter. Both PCL and PLA were printed with FDM without gaps at the interface, and the resulting paper-based devices possessed hydrophobic barriers consisting of PCL seamlessly integrated with vertical features consisting of PLA. We validated the capability of 3D-PAD to hold 30 μL of solvents (ethanol, isopropyl alcohol, and acetone), all of which would not be retained on conventional PADs fabricated with solid wax printers. To highlight the importance of containing an increased amount of liquid samples, a colorimetric assay for the formation of dimethylglyoxime (DMG)-Ni (II) was demonstrated using two volumes (10 μL and 30 μL) of solvent-based dimethylglyoxime (DMG). FDM printing of 3D-PAD enabled the facile construction of 3D structures integrated with PAD, which would find applications in paper-based chemical and biological assays requiring organic solvents.
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Affiliation(s)
- James S. Ng
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore;
| | - Michinao Hashimoto
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore;
- SUTD-MIT International Design Centre, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore
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25
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Topological, Mechanical and Biological Properties of Ti6Al4V Scaffolds for Bone Tissue Regeneration Fabricated with Reused Powders via Electron Beam Melting. MATERIALS 2021; 14:ma14010224. [PMID: 33466387 PMCID: PMC7794945 DOI: 10.3390/ma14010224] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/19/2020] [Accepted: 12/29/2020] [Indexed: 12/11/2022]
Abstract
Cellularized scaffold is emerging as the preferred solution for tissue regeneration and restoration of damaged functionalities. However, the high cost of preclinical studies creates a gap between investigation and the device market for the biomedical industry. In this work, bone-tailored scaffolds based on the Ti6Al4V alloy manufactured by electron beam melting (EBM) technology with reused powder were investigated, aiming to overcome issues connected to the high cost of preclinical studies. Two different elementary unit cell scaffold geometries, namely diamond (DO) and rhombic dodecahedron (RD), were adopted, while surface functionalization was performed by coating scaffolds with single layers of polycaprolactone (PCL) or with mixture of polycaprolactone and 20 wt.% hydroxyapatite (PCL/HA). The mechanical and biological performances of the produced scaffolds were investigated, and the results were compared to software simulation and experimental evidence available in literature. Good mechanical properties and a favorable environment for cell growth were obtained for all combinations of scaffold geometry and surface functionalization. In conclusion, powder recycling provides a viable practice for the biomedical industry to strongly reduce preclinical costs without altering biomechanical performance.
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26
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Kareem OO, Rahmani F, Hyman JA, Keller CB, Pasquinelli MA, Savin DA, Grayson SM. Solution size variation of linear and dendritic bis-MPA analogs using DOSY- 1H NMR. Polym Chem 2021. [DOI: 10.1039/d0py01070g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The size and size variability of bis-MPA dendrimers is shown to be smaller by DOSY-1H NMR than their linear analog, PBBM. This was accomplished using five different solvents and for the first time confirms, experimentally, what has been theorized.
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Affiliation(s)
| | - Farzin Rahmani
- Department of Forest Biomaterials
- Biltmore Hall
- North Carolina State University
- Raleigh
- USA
| | - Jason A. Hyman
- Department of Chemistry
- Percival Stern Hall
- Tulane University
- New Orleans
- USA
| | | | | | - Daniel A. Savin
- Department of Chemistry
- Leigh Hall
- University of Florida
- Gainesville
- USA
| | - Scott M. Grayson
- Department of Chemistry
- Percival Stern Hall
- Tulane University
- New Orleans
- USA
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27
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Silva DM, Liu R, Gonçalves AF, da Costa A, Castro Gomes A, Machado R, Vongsvivut J, J Tobin M, Sencadas V. Design of polymeric core-shell carriers for combination therapies. J Colloid Interface Sci 2020; 587:499-509. [PMID: 33388652 DOI: 10.1016/j.jcis.2020.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 12/28/2022]
Abstract
Particle engineering for co-delivery of drugs has the potential to combine multiple drugs with different pharmaceutical mechanisms within the same carrier, increasing the therapeutic efficiency while improving patient compliance. This work proposes a novel approach for producing polymer-polymer core-shell microparticles by multi-step processing of emulsion and spray drying. The particle core was obtained by an oil-in-water emulsion of poly(ε-caprolactone) (PCL) loaded with curcumin (CM), followed by the resuspension in poly(vinyl alcohol) (PVA) containing ciprofloxacin (CPx) forming the shell layer by spray-drying. The obtained core-shell particles showed an average size of 3.8 ± 1.2 μm, which is a suitable size for inhalation therapies. The spatial distribution of the drugs was studied using synchrotron-based macro attenuated total reflection Fourier transform infrared (macro ATR-FTIR) microspectroscopy to map the chemical distribution of the components within the particles and supported the presence of CM and CPx in the core and shell layers, respectively. The formation of the core-shell structure was further supported by the differences in the release profile of CM from these particles, when compared to the release profile observed for the single particle structure (PCL-CM). Both empty and drug-loaded carriers (up to 100 μg.mL-1) showed no cytotoxic effects on A549 cells while exhibiting the antibacterial activity of CPx against Gram-positive and Gram-negative bacteria. These polymer core-shell microparticles provide a promising route for the combination and sequential drug release therapies, with the potential to be used in inhalation therapies.
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Affiliation(s)
- Dina M Silva
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
| | - Ruy Liu
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Anabela F Gonçalves
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - André da Costa
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S (Institute of Science and Innovation for Sustainability), University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Andreia Castro Gomes
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S (Institute of Science and Innovation for Sustainability), University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Raul Machado
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; IB-S (Institute of Science and Innovation for Sustainability), University of Minho, Campus de Gualtar, Braga 4710-057, Portugal
| | - Jitraporn Vongsvivut
- Infrared Microspectroscopy (IRM) Beamline, Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Mark J Tobin
- Infrared Microspectroscopy (IRM) Beamline, Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Vitor Sencadas
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia; Illawarra Health and Medical Research Institute, Wollongong, NSW 2522, Australia.
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28
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Känkänen V, Seitsonen J, Tuovinen H, Ruokolainen J, Hirvonen J, Balasubramanian V, Santos HA. Evaluation of the effects of nanoprecipitation process parameters on the size and morphology of poly(ethylene oxide)-block-polycaprolactone nanostructures. Int J Pharm 2020; 590:119900. [PMID: 32991959 DOI: 10.1016/j.ijpharm.2020.119900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 11/26/2022]
Abstract
Nanoprecipitation is a straightforward method for the production of block copolymer nanoparticles for drug delivery applications. However, the effects of process parameters need to be understood to optimize and control the particle size distribution (PSD). To this end, we investigated the effects of material and process factors on PSD and morphology of nanoparticles prepared from an amphiphilic diblock copolymer, poly(ethylene oxide)-block-polycaprolactone. Using a Design of Experiments approach, we explored the joint effects of molecular weight, block length ratios, water volume fraction, stirring rate, polymer concentration and organic phase addition rate on hydrodynamic size and polydispersity index of the nanostructures and created statistical models explaining up to 94% of the variance in hydrodynamic diameter. In addition, we performed morphological characterization by cryogenic transmission electron microscopy and showed that increasing the process temperature may favor the formation of vesicles from these polymers. We showed that the effects of process parameters are dependent on the polymer configuration and we found that the most useful parameters to fine-tune the PSD are the initial polymer concentration and the stirring rate. Overall, this study provides evidence on the joint effects of material and process parameters on PSD and morphology, which will be useful for rational design of formulation-specific optimization studies, scale-up and process controls.
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Affiliation(s)
- Voitto Känkänen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Jani Seitsonen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja 2, FI-02150 Espoo, Finland
| | - Henri Tuovinen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | - Janne Ruokolainen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja 2, FI-02150 Espoo, Finland
| | - Jouni Hirvonen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland
| | | | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, FI-00014 Helsinki, Finland; Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI-00014 Helsinki, Finland.
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29
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Synthesis, Characterization, and Antimicrobial Evaluation of Random Poly(ester-Carbonate)s Bearing Pendant Primary Amine in the Main Chain. Polymers (Basel) 2020; 12:polym12112640. [PMID: 33182730 PMCID: PMC7696737 DOI: 10.3390/polym12112640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/06/2020] [Accepted: 11/06/2020] [Indexed: 11/17/2022] Open
Abstract
Starting from primary amine bearing cyclic carbonate tert-butyl-(2-oxo-1,3-dioxan-5-yl) carbamate (TBODC) and caprolactone (CL), amphiphilic poly(caprolactone-ran-amino trimethyl carbonate)s (P(CL-ran-ATC)s) random copolymers with controlled molecular weight and composition were synthesized via ring opening polymerization (ROP) and deprotection, using stannous octoate (Sn(Oct)2) as catalyst and benzyl alcohol (BnOH) as initiator. Therefore, hydrophilic/lipophilic ratio (HLR) of the P(CL-ran-ATC)s copolymers can be finely adjusted by the feed ratio of TBODC and CL. The antimicrobial activity against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) of P(CL-ran-ATC)s were proportional to HLR, and P(CL-ran-ATC)s presented more vigorous bactericidal activity towards S. aureus. The minimum inhibitory concentration (MIC) values of P(CL-ran-ATC 50.9%) are 2000 μg mL-1 and 3000 μg mL-1 for S. aureus and E. coli. While P(CL-ran-ATC 50.9%) exhibited deficient hemolytic activity as 1.41%. In addition, the P(CL-ran-ATC)s showed extremely low cytotoxicity towards fibroblast L929 cells.
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30
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Microfluidic-assisted production of poly(ɛ-caprolactone) and cellulose acetate nanoparticles: effects of polymers, surfactants, and flow rate ratios. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03367-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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31
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Nakagawa S, Yoshie N. Periodic Surface Pattern Induced by Crystallization of Polymer Brushes in Solvents. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shintaro Nakagawa
- Institute of Industrial Science, The University of Tokyo, Komaba 4-6-1, Meguro-ku, Tokyo 153-8505 Japan
| | - Naoko Yoshie
- Institute of Industrial Science, The University of Tokyo, Komaba 4-6-1, Meguro-ku, Tokyo 153-8505 Japan
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32
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Arrieta MP, Leonés Gil A, Yusef M, Kenny JM, Peponi L. Electrospinning of PCL-Based Blends: Processing Optimization for Their Scalable Production. MATERIALS 2020; 13:ma13173853. [PMID: 32882860 PMCID: PMC7504022 DOI: 10.3390/ma13173853] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 12/02/2022]
Abstract
In this work poly(ε-caprolactone) (PCL) based electrospun mats were prepared by blending PCL with microcrystalline cellulose (MCC) and poly(3-hydroxybutyrate) (PHB). The electrospinning processing parameters were firstly optimized with the aim to obtain scalable PCL-based electrospun mats to be used in the industrial sector. Neat PCL as well as PCL-MCC and PCL-PHB based mats in different proportions (99:1; 95:5; 90:10) were prepared. A complete morphological, thermal and mechanical characterization of the developed materials was carried out. Scanning electron microscopy (SEM) observations showed that the addition of PHB to the PCL matrix considerably reduced the formation of beads. Both the addition of MCC and PHB reduced the thermal stability of PCL, but obtained materials with enough thermal stability for the intended use. The electrospun PCL fibers show greatly reduced flexibility with respect to the PCL bulk material, however when PCL is blended with PHB their stretchability is increased, changing their elongation at break from 35% to 70% when 10 wt% of PHB is blended with PCL. However, the mechanical response of the different blends increases with respect to the neat electrospun PCL, offering the possibility to modulate their properties according to the required industrial applications.
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Affiliation(s)
- Marina P. Arrieta
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (M.P.A.); (A.L.G.); (M.Y.); (J.M.K.)
- Facultad de Óptica y Optometría, Universidad Complutense de Madrid (UCM), Arcos de Jalón 118, 28037 Madrid, Spain
| | - Adrián Leonés Gil
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (M.P.A.); (A.L.G.); (M.Y.); (J.M.K.)
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28006 Madrid, Spain
| | - Maysa Yusef
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (M.P.A.); (A.L.G.); (M.Y.); (J.M.K.)
| | - José M. Kenny
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (M.P.A.); (A.L.G.); (M.Y.); (J.M.K.)
- Civil and Environmental Engineering Department, STM Group, University of Perugia, 05100 Terni, Italy
| | - Laura Peponi
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (M.P.A.); (A.L.G.); (M.Y.); (J.M.K.)
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), 28006 Madrid, Spain
- Correspondence:
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33
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Dodero A, Alloisio M, Castellano M, Vicini S. Multilayer Alginate-Polycaprolactone Electrospun Membranes as Skin Wound Patches with Drug Delivery Abilities. ACS APPLIED MATERIALS & INTERFACES 2020; 12:31162-31171. [PMID: 32573197 PMCID: PMC8008386 DOI: 10.1021/acsami.0c07352] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A multilayer nanofibrous membrane consisting of a layer of polycaprolactone and one of physically cross-linked alginate-embedding ZnO nanoparticles is prepared via electrospinning technique as potential wound healing patches with drug delivery capabilities. A washing-cross-linking protocol is developed to obtain stable materials at the same time removing poly(ethylene oxide), which was used here as a cospinning agent for alginate, without interfering with the membrane's peculiar nanofibrous structure. The mechanical behavior of the samples is assessed via a uniaxial tensile test showing appropriate resistance and manageability together with a good thermal stability as proved via thermogravimetric analysis. The polycaprolactone external layer enriches the samples with good liquid-repellent properties, whereas the alginate layer is able to promote tissue regeneration owing to its capability to promote cell viability and allow exudate removal and gas exchanges. Moreover, using methylene blue and methyl orange as model molecules, promising drug delivery abilities are observed for the mats. Indeed, depending on the nature and on the dye-loading concentration, the release kinetic can be easily tuned to obtain a slow controlled or a fast burst release. Consequently, the proposed alginate-polycaprolactone membrane represents a promising class of innovative, simple, and cost-effective wound healing patches appropriate for large-scale production.
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34
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Cao Y, Han W, Pu Z, Wang X, Wang B, Liu C, Uyama H, Shen C. Fabrication of hierarchically porous superhydrophilic polycaprolactone monolith based on nonsolvent-thermally induced phase separation. RSC Adv 2020; 10:26319-26325. [PMID: 35519741 PMCID: PMC9055430 DOI: 10.1039/d0ra04687f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/08/2020] [Indexed: 12/01/2022] Open
Abstract
Monoliths with a continuous porous structure are of great interest due to high transfer efficiency and large surface area in environmental and tissue engineering fields. This study demonstrated a facile method to prepare PCL monoliths with hierarchically porous structure by nonsolvent-thermally induced phase separation. A suitable mixed solvent mixture using ethanol as nonsolvent reduced the amount of dioxane and provided PCL monoliths with three levels of structures. The monolith structure was easily controlled by changing the fabrication parameters, such as the nonsolvent, the temperature of phase separation, the concentration of the PCL. Finally, the superhydrophilic monolith was easily obtained by polydopamine surface modification. The easy way of fabrication of a hierarchically porous PCL monolith with superhydrophilicity will find applications such as in tissue engineering and purification.
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Affiliation(s)
- Yu Cao
- School of Materials Science & Engineering, Zhengzhou University Zhengzhou 450001 China
| | - Wenjuan Han
- School of Materials Science & Engineering, Zhengzhou University Zhengzhou 450001 China
| | - Ziyang Pu
- School of Materials Science & Engineering, Zhengzhou University Zhengzhou 450001 China
| | - Xiaofeng Wang
- School of Mechanics and Engineering Science, National Center for International Research of Micro-Nano Molding Technology, Key Laboratory of Henan Province for Micro Molding Technology Zhengzhou 450001 China
| | - Bo Wang
- School of Materials Science & Engineering, Zhengzhou University Zhengzhou 450001 China
| | - Chuntai Liu
- Key Laboratory of Materials Processing and Mold, Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University Zhengzhou 450001 China
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita 565-0871 Japan
| | - Changyu Shen
- Key Laboratory of Materials Processing and Mold, Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University Zhengzhou 450001 China
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Leonés A, Mujica-Garcia A, Arrieta MP, Salaris V, Lopez D, Kenny JM, Peponi L. Organic and Inorganic PCL-Based Electrospun Fibers. Polymers (Basel) 2020; 12:polym12061325. [PMID: 32532052 PMCID: PMC7361952 DOI: 10.3390/polym12061325] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/25/2020] [Accepted: 06/02/2020] [Indexed: 11/16/2022] Open
Abstract
In this work, different nanocomposite electrospun fiber mats were obtained based on poly(e-caprolactone) (PCL) and reinforced with both organic and inorganic nanoparticles. In particular, on one side, cellulose nanocrystals (CNC) were synthesized and functionalized by "grafting from" reaction, using their superficial OH- group to graft PCL chains. On the other side, commercial chitosan, graphene as organic, while silver, hydroxyapatite, and fumed silica nanoparticles were used as inorganic reinforcements. All the nanoparticles were added at 1 wt% with respect to the PCL polymeric matrix in order to compare the different behavior of the woven no-woven nanocomposite electrospun fibers with a fixed amount of both organic and inorganic nanoparticles. From the thermal point of view, no difference was found between the effect of the addition of organic or inorganic nanoparticles, with no significant variation in the Tg (glass transition temperature), Tm (melting temperature), and the degree of crystallinity, leading in all cases to high crystallinity electrospun mats. From the mechanical point of view, the highest values of Young modulus were obtained when graphene, CNC, and silver nanoparticles were added to the PCL electrospun fibers. Moreover, all the nanoparticles used, both organic and inorganic, increased the flexibility of the electrospun mats, increasing their elongation at break.
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Affiliation(s)
- Adrián Leonés
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy—The Spanish National Research Council (SusPlast-CSIC), 28006 Madrid, Spain
| | - Alicia Mujica-Garcia
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
- Facultad de Óptica y Optometría, Universidad Complutense de Madrid (UCM), Arcos de Jalón 118, 28037 Madrid, Spain
| | - Marina Patricia Arrieta
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
- Civil and Environmental Engineering Department, University of Perugia, Via G, Duranti 93, 06125 Perugia, Italy
| | - Valentina Salaris
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
| | - Daniel Lopez
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy—The Spanish National Research Council (SusPlast-CSIC), 28006 Madrid, Spain
| | - José Maria Kenny
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
- Civil and Environmental Engineering Department, University of Perugia, Via G, Duranti 93, 06125 Perugia, Italy
| | - Laura Peponi
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain; (A.L.); (A.M.-G.); (M.P.A.); (V.S.); (D.L.); (J.M.K.)
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy—The Spanish National Research Council (SusPlast-CSIC), 28006 Madrid, Spain
- Correspondence:
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Veras FF, Ritter AC, Roggia I, Pranke P, Pereira CN, Brandelli A. Natamycin-loaded electrospun poly(ε-caprolactone) nanofibers as an innovative platform for antifungal applications. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2912-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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37
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Ahmad SI, Yunus NA, Akbar Ali M, Hashim H, Mustaffa AA, Rashid R. Solvent design and inherent safety assessment of solvent alternatives for palm oil recovery. J Loss Prev Process Ind 2020. [DOI: 10.1016/j.jlp.2020.104120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Development of double porous poly (ε - caprolactone)/chitosan polymer as tissue engineering scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 107:110257. [DOI: 10.1016/j.msec.2019.110257] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 09/23/2019] [Accepted: 09/25/2019] [Indexed: 12/24/2022]
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39
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Formulation development of lipid nanoparticles: Improved lipid screening and development of tacrolimus loaded nanostructured lipid carriers (NLC). Int J Pharm 2020; 576:118918. [DOI: 10.1016/j.ijpharm.2019.118918] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 11/24/2019] [Accepted: 11/28/2019] [Indexed: 01/01/2023]
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Preparation of n-Alkane/Polycaprolactone Phase-Change Microcapsules via Single Nozzle Electro-Spraying: Characterization on Their Formation, Structures and Properties. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10020561] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The phase change microcapsule (mPCM) is one of the primary candidates in the fields of energy storage and thermal regulation. In this study, electro-spraying, as a green, high-efficiency electrohydrodynamic atomization technology, is applied to the microencapsulation of two phase change materials (PCM) (n-hexadecane and n-eicosane) with three loading contents (30%, 50%, and 70% by weight) in a polycaprolactone matrix. Ethyl acetate (EA) and chloroform (Chl) were chosen as solvents to prepare the working solutions. The objective of this study is to clarify the microencapsulation process during electro-spraying and to optimize the structure and properties of the electro-sprayed mPCM. The structures, morphologies, and thermal properties of the mPCM were characterized by optical microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), and fourier transform infrared spectroscopy (FT-IR). Electro-sprayed spherical and non-porous mPCM have been successfully prepared. The mean diameter and the particle size distribution depend mainly on the choice of the n-alkane, as well as the solvent used to prepare the working solutions. Meanwhile, the structure formation of electro-sprayed mPCM and the loading content of PCM were mainly influenced by the evaporation of the solvent and the phase separation between PCM and poly(caprolactone) (PCL) matrix. During the shell formation or PCL solidification, the control of the PCM leaching out of the matrix allows improving the loading content. Finally, based on a high latent heat and simple formation process, the electro-spraying route of PCM is a green, non-toxic, and high-efficiency direction for energy storage and heat regulation.
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41
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Boucher DS. Solubility parameters and solvent affinities for polycaprolactone: A comparison of methods. J Appl Polym Sci 2020. [DOI: 10.1002/app.48908] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- David S. Boucher
- Department of Chemistry and BiochemistryCollege of Charleston 66 George Street Charleston South Carolina 29401
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Costa T, Ribeiro A, Machado R, Ribeiro C, Lanceros-Mendez S, Cavaco-Paulo A, Almeida A, das Neves J, Lúcio M, Viseu T. Polymeric Electrospun Fibrous Dressings for Topical Co-delivery of Acyclovir and Omega-3 Fatty Acids. Front Bioeng Biotechnol 2019; 7:390. [PMID: 31850337 PMCID: PMC6901623 DOI: 10.3389/fbioe.2019.00390] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 11/19/2019] [Indexed: 12/31/2022] Open
Abstract
Herpetic infections caused by Herpes simplex virus (HSV) are among the most common human infections, affecting more than two quarters of the world's population. The standard treatment for orofacial herpes is the administration of antiviral drugs, mainly acyclovir (ACV). However, current products are mostly based on semisolid formulations that have limited ability to promote drug skin penetration and tend to leak from the application site, thus showing reduced ability to sustain local drug residence. This work reports on the production of poly (ε-caprolactone) (PCL) fibrous matrices with ACV and omega-3 fatty acids (ω3) for application as dressings to the topical treatment of orofacial herpes. PCL fibrous matrices with the co-incorporated bioactive compounds were obtained by electrospinning and characterized regarding their morphology, chemical, physical, and mechanical properties. The potential use of the developed polymeric fibrous matrices for topical applications was evaluated by: (i) the release kinetics of the bioactive compounds; (ii) the occlusive factor of the fibrous mat; (iii) ACV skin permeation capacity; and (iv) the cytotoxicity in a keratinocyte cell line. PCL fibrous matrices loaded with the bioactive compounds presented a smooth morphology and a good balance between flexibility and hardness essential to be durable for handling, while having a desirable texture to be used comfortably. The fibrous mat also provided a sustained release of ACV during 96 h and improved the skin permeability of this drug (Kp = 0.00928 ± 0.000867 cm/h) presenting also high porosity (74%) and a water vapor transmission rate (WVTR) of 881 ± 91 g/m2day, essential to maintain moist and oxygen for faster healing of herpes lesions. Furthermore, cytotoxicity studies suggest that the fibrous mat are safe for topical application. Overall, the PCL based electrospun fibrous matrices with ACV and ω3 hereby described have the potential to be used as therapeutic bandage systems for the treatment of orofacial herpes.
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Affiliation(s)
- Tiago Costa
- Centre of Physics of Universities of Minho and Porto (CF-UM-UP), University of Minho, Braga, Portugal
| | - Artur Ribeiro
- Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
| | - Raul Machado
- Centre of Molecular and Environmental Biology (CBMA), University of Minho, Braga, Portugal.,Institute of Science and Innovation for Sustainability (IB-S), University of Minho, Braga, Portugal
| | - Clarisse Ribeiro
- Centre of Physics of Universities of Minho and Porto (CF-UM-UP), University of Minho, Braga, Portugal.,Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
| | - Senentxu Lanceros-Mendez
- Centre of Physics of Universities of Minho and Porto (CF-UM-UP), University of Minho, Braga, Portugal.,Basque Center for Materials, Applications and Nanostructures (BCMaterials), UPV/EHU Science Park, Leioa, Spain.,Basque Foundation for Science (Ikerbasque), Bilbao, Spain
| | - Artur Cavaco-Paulo
- Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
| | - Andreia Almeida
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Institute of Biomedical Engineering (INEB), University of Porto, Porto, Portugal.,Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - José das Neves
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal.,Institute of Biomedical Engineering (INEB), University of Porto, Porto, Portugal
| | - Marlene Lúcio
- Centre of Physics of Universities of Minho and Porto (CF-UM-UP), University of Minho, Braga, Portugal.,Centre of Molecular and Environmental Biology (CBMA), University of Minho, Braga, Portugal
| | - Teresa Viseu
- Centre of Physics of Universities of Minho and Porto (CF-UM-UP), University of Minho, Braga, Portugal
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43
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Zhang X, Yang L, Zhang C, Liu D, Meng S, Zhang W, Meng S. Effect of Polymer Permeability and Solvent Removal Rate on In Situ Forming Implants: Drug Burst Release and Microstructure. Pharmaceutics 2019; 11:pharmaceutics11100520. [PMID: 31658642 PMCID: PMC6835277 DOI: 10.3390/pharmaceutics11100520] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 09/26/2019] [Accepted: 10/08/2019] [Indexed: 02/03/2023] Open
Abstract
To explore the mechanism of drug release and depot formation of in situ forming implants (ISFIs), osthole-loaded ISFIs were prepared by dissolving polylactide, poly(lactide-co-glycolide), polycaprolactone, or poly(trimethylene carbonate) in different organic solvents, including N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), and triacetin (TA). Drug release, polymer degradation, solvent removal rate and depot microstructure were examined. The burst release effect could be reduced by using solvents exhibit slow forming phase inversion and less permeable polymers. Both the drug burst release and polymer depot microstructure were closely related to the removal rate of organic solvent. Polymers with higher permeability often displayed faster drug and solvent diffusion rates. Due to high polymer-solvent affinity, some of the organic solvent remained in the depot even after the implant was completely formed. The residual of organic solvent could be predicted by solubility parameters. The ISFI showed a lower initial release in vivo than that in vitro. In summary, the effects of different polymers and solvents on drug release and depot formation in ISFI systems were extensively investigated and discussed in this article. The two main factors, polymer permeability and solvent removal rate, were involved in different stages of drug release and depot formation in ISFI systems.
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Affiliation(s)
- Xiaowei Zhang
- Department of Pharmaceutics, School of Pharmacy, China Medical University, Liaoning 110122, China.
- Key Laboratory of Reproductive Health, Liaoning Research Institute of Family Planning, Liaoning 110031, China.
| | - Liqun Yang
- Key Laboratory of Reproductive Health, Liaoning Research Institute of Family Planning, Liaoning 110031, China.
| | - Chong Zhang
- Key Laboratory of Reproductive Health, Liaoning Research Institute of Family Planning, Liaoning 110031, China.
| | - Danhua Liu
- Key Laboratory of Reproductive Health, Liaoning Research Institute of Family Planning, Liaoning 110031, China.
| | - Shu Meng
- Shenyang Institute for Drug Control, Liaoning 110084, China.
| | - Wei Zhang
- Key Laboratory of Reproductive Health, Liaoning Research Institute of Family Planning, Liaoning 110031, China.
| | - Shengnan Meng
- Department of Pharmaceutics, School of Pharmacy, China Medical University, Liaoning 110122, China.
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44
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Solubility parameter estimation and phase inversion modeling of bentonite‐doped polymeric membrane systems. J Appl Polym Sci 2019. [DOI: 10.1002/app.48450] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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45
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Aldemir Dikici B, Dikici S, Reilly GC, MacNeil S, Claeyssens F. A Novel Bilayer Polycaprolactone Membrane for Guided Bone Regeneration: Combining Electrospinning and Emulsion Templating. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2643. [PMID: 31434207 PMCID: PMC6721100 DOI: 10.3390/ma12162643] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 08/05/2019] [Accepted: 08/16/2019] [Indexed: 01/08/2023]
Abstract
Guided bone regeneration is a common dental implant treatment where a barrier membrane (BM) is used between epithelial tissue and bone or bone graft to prevent the invasion of the fast-proliferating epithelial cells into the defect site to be able to preserve a space for infiltration of slower-growing bone cells into the periodontal defect site. In this study, a bilayer polycaprolactone (PCL) BM was developed by combining electrospinning and emulsion templating techniques. First, a 250 µm thick polymerised high internal phase emulsion (polyHIPE) made of photocurable PCL was manufactured and treated with air plasma, which was shown to enhance the cellular infiltration. Then, four solvent compositions were investigated to find the best composition for electrospinning a nanofibrous PCL barrier layer on PCL polyHIPE. The biocompatibility and the barrier properties of the electrospun layer were demonstrated over four weeks in vitro by histological staining. Following in vitro assessment of cell viability and cell migration, cell infiltration and the potential of PCL polyHIPE for supporting blood vessel ingrowth were further investigated using an ex-ovo chick chorioallantoic membrane assay. Our results demonstrated that the nanofibrous PCL electrospun layer was capable of limiting cell infiltration for at least four weeks, while PCL polyHIPE supported cell infiltration, calcium and mineral deposition of bone cells, and blood vessel ingrowth through pores.
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Affiliation(s)
- Betül Aldemir Dikici
- Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield S3 7HQ, UK
| | - Serkan Dikici
- Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield S3 7HQ, UK
| | - Gwendolen C Reilly
- Department of Materials Science and Engineering, University of Sheffield, INSIGNEO Institute for in silico Medicine, The Pam Liversidge Building, Sheffield S1 3JD, UK
| | - Sheila MacNeil
- Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield S3 7HQ, UK
| | - Frederik Claeyssens
- Department of Materials Science and Engineering, University of Sheffield, Kroto Research Institute, Sheffield S3 7HQ, UK.
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46
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Omarch G, Kippie Y, Mentor S, Ebrahim N, Fisher D, Murilla G, Swai H, Dube A. Comparative in vitro transportation of pentamidine across the blood-brain barrier using polycaprolactone nanoparticles and phosphatidylcholine liposomes. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:1428-1436. [PMID: 31007068 DOI: 10.1080/21691401.2019.1596923] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nanoparticles (NPs) have gained importance in addressing drug delivery challenges across biological barriers. Here, we reformulated pentamidine, a drug used to treat Human African Trypanosomiasis (HAT) in polymer based nanoparticles and liposomes and compared their capability to enhance pentamidine penetration across blood brain barrier (BBB). Size, polydispersity index, zeta potential, morphology, pentamidine loading and drug release profiles were determined by various methods. Cytotoxicity was tested against the immortalized mouse brain endothelioma cells over 96 h. Moreover, cells monolayer integrity and transportation ability were examined for 24 h. Pentamidine-loaded polycaprolactone (PCL) nanoparticles had a mean size of 267.58, PDI of 0.25 and zeta potential of -28.1 mV and pentamidine-loaded liposomes had a mean size of 119.61 nm, PDI of 0.25 and zeta potential 11.78. Pentamidine loading was 0.16 µg/mg (w/w) and 0.17 µg/mg (w/w) in PCL NPs and liposomes respectively. PCL nanoparticles and liposomes released 12.13% and 22.21% of pentamidine respectively after 24 h. Liposomes transported 87% of the dose, PCL NPs 66% of the dose and free pentamidine penetration was 63% of the dose. These results suggest that liposomes are comparatively promising nanocarriers for transportation of pentamidine across BBB.
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Affiliation(s)
- Geofrey Omarch
- a School of Life Sciences , The Nelson Mandela African Institution of Science and Technology , Tengeru , Arusha , Tanzania.,b Tanzania Veterinary Laboratory Agency , Temeke , Dar es Salaam , Tanzania
| | - Yunus Kippie
- c School of Pharmacy , University of the Western Cape , Bellville , South Africa
| | - Shireen Mentor
- d School of Life Sciences , University of the Western Cape , Bellville , South Africa
| | - Naushaad Ebrahim
- c School of Pharmacy , University of the Western Cape , Bellville , South Africa
| | - David Fisher
- d School of Life Sciences , University of the Western Cape , Bellville , South Africa
| | - Grace Murilla
- e Biotechnology Research Institute, Kenya Agricultural and Livestock Research Organization , Kikuyu, Nairobi , Kenya
| | - Hulda Swai
- a School of Life Sciences , The Nelson Mandela African Institution of Science and Technology , Tengeru , Arusha , Tanzania
| | - Admire Dube
- c School of Pharmacy , University of the Western Cape , Bellville , South Africa
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47
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Iesavand H, Rahmati M, Afzali D, Modiri S. Investigation on absorption and release of mercaptopurine anticancer drug from modified polylactic acid as polymer carrier by molecular dynamic simulation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110010. [PMID: 31546426 DOI: 10.1016/j.msec.2019.110010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 06/10/2019] [Accepted: 07/22/2019] [Indexed: 11/17/2022]
Abstract
The absorption and release of 6-mercaptopurine anticancer drug was investigated in biodegradable and biocompatible polymer of polylactic acid (PLA) using molecular dynamics simulation. For this purpose, the amount of mixing energy, radius of gyration, mean squared displacement and radial distribution function were computed and compared in concentrations of 5-36 wt% of 6-mercaptopurine drug. The simulation results show that increasing the concentration of the drug reduces mixing energy and PLA polymer carrier is able to carry 35.8 wt% of 6-mercaptopurine anticancer drug. Based on these results, the amount of 6-mercaptopurine release from PLA carrier 35.8 wt% of it in water environment is zero due to hydrophobic property of PLA and 6-mercaptopurine. Finally, polyethylene glycol (PEG) polymer with different percentages (10-30 wt%) was used to modify PLA carrier. The simulation results show that the rate of drug release increases by increasing the concentration of PEG polymer in the modified PLA carrier and also with increasing the percentage of drug loaded in the carrier and also the optimum weight percentage of PEG in modified PLA carrier for 35.8 wt% of drug concentration is 11 wt% and the rate of drug release is slower and equal to 4.4 molecules/ns.
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Affiliation(s)
- Homa Iesavand
- Department of Chemical Engineering, Graduate University of Advanced Technology, Kerman, Iran
| | - Mahmoud Rahmati
- Department of Chemical Engineering, Graduate University of Advanced Technology, Kerman, Iran.
| | - Dariush Afzali
- Department of Environment, Institute of Science and High Technology and Environmental Sciences, Kerman, Iran
| | - Sina Modiri
- Department of Chemical Engineering, Graduate University of Advanced Technology, Kerman, Iran
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48
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Aldemir Dikici B, Sherborne C, Reilly GC, Claeyssens F. Emulsion templated scaffolds manufactured from photocurable polycaprolactone. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Espinoza SM, Patil HI, San Martin Martinez E, Casañas Pimentel R, Ige PP. Poly-ε-caprolactone (PCL), a promising polymer for pharmaceutical and biomedical applications: Focus on nanomedicine in cancer. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2018.1539990] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sergio Miguel Espinoza
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaria 694, Col. Irrigación, 11500 Ciudad de México
| | - Harshal Indrabhan Patil
- Department of Pharmaceutics, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Dhule, Maharashtra 425405, India
| | - Eduardo San Martin Martinez
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaria 694, Col. Irrigación, 11500 Ciudad de México
| | - Rocio Casañas Pimentel
- CONACYT-Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaria 694, Col. Irrigación, 11500 Ciudad de México
| | - Pradum Pundlikrao Ige
- Department of Pharmaceutics, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur, Dhule, Maharashtra 425405, India
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50
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Preparation of Electrosprayed Poly(caprolactone) Microparticles Based on Green Solvents and Related Investigations on the Effects of Solution Properties as Well as Operating Parameters. COATINGS 2019. [DOI: 10.3390/coatings9020084] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Electrosprayed poly(caprolactone) (PCL) microparticles were produced using five solvents (ethyl acetate, acetone, anisole, glacial acetic acid and chloroform) under different PCL concentrations and operating parameters. Not only green and appropriate solvent for PCL electrospraying was pointed out, but also the effects of solution properties (surface tension, electrical conductivity, viscosity and vapor pressure) and operating parameters (flow rate, working distance and applied voltage) on the formation of electrosprayed particles were clarified. The formation and shape of Taylor cone during electrospraying was observed by high-speed images captured with a camera, and the size and morphology of electrosprayed particles were characterized by optical and scanning electron microscopies. It can conclude that the cone–jet range of applied voltage mainly depended on electrical conductivity, and an ideal Taylor cone was easier to form under high viscosity and low surface tension. Although high electrical conductivity was a contributor to fabricate tiny particles, it was easier to fabricate mono-dispersed microparticles under low electrical conductivity. The poly-dispersed distribution obtained with a high electrical conductivity converted into mono-dispersed distribution with the increasing of viscosity. Furthermore, the size of electrosprayed particles also correlated with the surface tension and vapor pressure of the solvent used. Ethyl acetate, due to mild electrical conductivity and surface tension, moderate viscosity and vapor pressure, is a green and suitable solvent for PCL electrospraying. Single pore PCL microparticles with smooth cherry-like morphology can be prepared from ethyl acetate. Finally, long working distance not only stabilizes the break-up of charged jet, but also promotes the evaporation of solvent.
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