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Giuliani C, De Stefano I, Mancuso M, Fiaschini N, Hein LA, Mirabile Gattia D, Scatena E, Zenobi E, Del Gaudio C, Galante F, Felici G, Rinaldi A. Advanced Electrospun Composites Based on Polycaprolactone Fibers Loaded with Micronized Tungsten Powders for Radiation Shielding. Polymers (Basel) 2024; 16:2590. [PMID: 39339053 PMCID: PMC11435529 DOI: 10.3390/polym16182590] [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: 07/30/2024] [Revised: 09/06/2024] [Accepted: 09/09/2024] [Indexed: 09/30/2024] Open
Abstract
Exposure to high levels of radiation can cause acute, long-term health effects, such as acute radiation syndrome, cancer, and cardiovascular disease. This is an important occupational hazard in different fields, such as the aerospace and healthcare industry, as well as a crucial burden to overcome to boost space applications and exploration. Protective bulky equipment made of heavy metals is not suitable for many advanced purporses, such as mobile devices, wearable shields, and manned spacecrafts. In the latter case, the in-space manufacturing of protective shields is highly desirable and remains an unmet need. Composites made of polymers and high atomic number fillers are potential means for radiation protection due to their low weight, good flexibility, and good processability. In the present work, we developed electrospun composites based on polycaprolactone (polymer matrix) and tungsten powder for application as shielding materials. Electrospinning is a versatile technology that is easily scalable at an industrial level and allows obtaining very lightweight, flexible sheet materials for wearables. By controlling tungsten powder size, we engineered homogeneous, stable and processable suspensions to fabricate radiation composite shielding sheets. The shielding capability was assessed by an in vivo model on prototype composite sheets containing 80 w% of W filler in a polycaprolactone (PCL) fibrous matrix by means of irradiation tests (X-rays) on mice. The obtained results are promising; as expected, the shielding effectivity of the developed composite material increases with the thickness/number of stacked layers. It is worth noting that a thin barrier consisting of 24 layers of the innovative shielding material reduces the extent of apoptosis by 1.5 times compared to the non-shielded mice.
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Affiliation(s)
- Chiara Giuliani
- TERIN-DEC-ACEL Laboratory, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
| | - Ilaria De Stefano
- Division of Biotechnologies (SSPT-BIOTEC), ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
| | - Mariateresa Mancuso
- Division of Biotechnologies (SSPT-BIOTEC), ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
| | | | | | - Daniele Mirabile Gattia
- SSPT-TIMAF-MADD Laboratory, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
| | - Elisa Scatena
- E. Amaldi Foundation, Via del Politecnico snc, 00133 Rome, Italy
| | - Eleonora Zenobi
- E. Amaldi Foundation, Via del Politecnico snc, 00133 Rome, Italy
| | | | | | | | - Antonio Rinaldi
- TERIN-DEC-ACEL Laboratory, ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Via Anguillarese 301, 00123 Rome, Italy
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Hou C, Li H, Sun X, Yan S, Wang Y, Chen S. The dependence of the β-to-α phase transition behavior of poly(1,4-butylene adipate) on phase separated morphology in its blends with poly(vinylidene fluoride). Phys Chem Chem Phys 2018; 20:15718-15724. [DOI: 10.1039/c8cp02464b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two kinds of typical phase separated morphologies are prepared and they alter the stability of crystals.
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Affiliation(s)
- Chunyue Hou
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Huihui Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- Key Laboratory of Rubber-Plastics
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Hou C, Sun X, Ren Z, Li H, Yan S. Polymorphism and Enzymatic Degradation of Poly(1,4-butylene adipate) and Its Binary Blends with Atactic Poly(3-hydroxybutyrate) and Poly(vinyl phenol). Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b03706] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chunyue Hou
- State Key Laboratory of Chemical Resource
Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource
Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhongjie Ren
- State Key Laboratory of Chemical Resource
Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Huihui Li
- State Key Laboratory of Chemical Resource
Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource
Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Khan I, Ray Dutta J, Ganesan R. Lactobacillus sps. lipase mediated poly (ε-caprolactone) degradation. Int J Biol Macromol 2016; 95:126-131. [PMID: 27865950 DOI: 10.1016/j.ijbiomac.2016.11.040] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/08/2016] [Accepted: 11/09/2016] [Indexed: 11/28/2022]
Abstract
Polymer degradation through lipase appears to be an enthralling alternative to bulk chemical routes. Poly (ε-caprolactone) (PCL) is an artificial polyester that can be degraded by microbes and enzymes like lipases and esterases. The environmental degradation of PCL is dependent on the activity of bacteria that characterization techniques such as thermogravimetric analysis, differential thermal are widely present in the ecosystem. In this study, three different lipases derived from Lactobacillus brevis, Lactobacillus plantarum and their co-culture have been utilized to explore their efficiency towards PCL enzymatic degradation. The effect of parameters such as enzyme loading and degradation time has been explored to understand the efficiency of the enzymes used in this study. Various analysis, scanning electron microscopy and Fourier transform infrared spectroscopy have been employed to study the enzymatic degradation and its possible mechanistic insight.
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Affiliation(s)
- Imran Khan
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad 500078, Telangana, India
| | - Jayati Ray Dutta
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad 500078, Telangana, India.
| | - Ramakrishnan Ganesan
- Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad 500078, Telangana, India.
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Affiliation(s)
- Imran Khan
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, Telangana, India
| | - Jayati Ray Dutta
- Department of Biological Sciences, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, Telangana, India
| | - Ramakrishnan Ganesan
- Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, Telangana, India
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Biodegradable Poly(ε-Caprolactone)-Based Graft Copolymers Via Poly(Linoleic Acid): In Vitro Enzymatic Evaluation. J AM OIL CHEM SOC 2015. [DOI: 10.1007/s11746-015-2611-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pawar SP, Kumar S, Misra A, Deshmukh S, Chatterjee K, Bose S. Enzymatically degradable EMI shielding materials derived from PCL based nanocomposites. RSC Adv 2015. [DOI: 10.1039/c4ra10364e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bio-degradable nanocomposites with enhanced microwave attenuation ability were designed from PCL and MWNTs.
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Affiliation(s)
| | - Sachin Kumar
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Anupam Misra
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Subrajeet Deshmukh
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Kaushik Chatterjee
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Suryasarathi Bose
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
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Mao Z, Ganesh M, Bucaro M, Smolianski I, Gross RA, Lyons AM. High throughput, high resolution enzymatic lithography process: effect of crystallite size, moisture, and enzyme concentration. Biomacromolecules 2014; 15:4627-36. [PMID: 25346335 DOI: 10.1021/bm501475n] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
By bringing enzymes into contact with predefined regions of a surface, a polymer film can be selectively degraded to form desired patterns that find a variety of applications in biotechnology and electronics. This so-called "enzymatic lithography" is an environmentally friendly process as it does not require actinic radiation or synthetic chemicals to develop the patterns. A significant challenge to using enzymatic lithography has been the need to restrict the mobility of the enzyme in order to maintain control of feature sizes. Previous approaches have resulted in low throughput and were limited to polymer films only a few nanometers thick. In this paper, we demonstrate an enzymatic lithography system based on Candida antartica lipase B (CALB) and poly(ε-caprolactone) (PCL) that can resolve fine-scale features, (<1 μm across) in thick (0.1-2.0 μm) polymer films. A Polymer Pen Lithography (PPL) tool was developed to deposit an aqueous solution of CALB onto a spin-cast PCL film. Immobilization of the enzyme on the polymer surface was monitored using fluorescence microscopy by labeling CALB with FITC. The crystallite size in the PCL films was systematically varied; small crystallites resulted in significantly faster etch rates (20 nm/min) and the ability to resolve smaller features (as fine as 1 μm). The effect of printing conditions and relative humidity during incubation is also presented. Patterns formed in the PCL film were transferred to an underlying copper foil demonstrating a "Green" approach to the fabrication of printed circuit boards.
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Affiliation(s)
- Zhantong Mao
- Department of Chemistry, College of Staten Island, City University of New York , 6S-225, 2800 Victory Boulevard, Staten Island, New York 10314, United States
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Ning ZB, Nielsen R, Zhao LF, Yu DH, Gan ZH. Influence of Teflon substrate on crystallization and enzymatic degradation of polymorphic poly(butylene adipate). CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1503-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kinetics of coarsening in immiscible poly (ɛ-caprolactone)/poly(styrene-co-acrylonitrile) blends. Polym J 2011. [DOI: 10.1038/pj.2011.110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lee YK, Kim JM, Kim WN. Mechanical and Morphological Properties of Poly(acrylonitrile-butadiene-styrene) and Poly(lactic acid) Blends. KOREAN CHEMICAL ENGINEERING RESEARCH 2011. [DOI: 10.9713/kcer.2011.49.4.438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Lee YK, Kim MS, Kim WN. Effect of Compatibilizers on the Morphological, Mechanical and Rheological Properties of PP/PCL and TPO/PCL Blends. KOREAN CHEMICAL ENGINEERING RESEARCH 2011. [DOI: 10.9713/kcer.2011.49.3.342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tuzlakoglu K, Pashkuleva I, Rodrigues MT, Gomes ME, van Lenthe GH, Müller R, Reis RL. A new route to produce starch-based fiber mesh scaffolds by wet spinning and subsequent surface modification as a way to improve cell attachment and proliferation. J Biomed Mater Res A 2010; 92:369-77. [DOI: 10.1002/jbm.a.32358] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Wang Y, Yang JF. Physical properties and biodegradation of acrylic acid grafted poly(ε-caprolactone)/chitosan blends. JOURNAL OF POLYMER RESEARCH 2009. [DOI: 10.1007/s10965-009-9308-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mallepally RR, Smirnova I, Arlt W, Seiler M, Klee-Laquai SK, Hills G. Enzymatic degradation of hyperbranched polyesters. J Appl Polym Sci 2009. [DOI: 10.1002/app.29524] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Svoboda P, Svobodova D, Chiba T, Inoue T. Competition of phase dissolution and crystallization in poly(ε-caprolactone)/poly(styrene-co-acrylonitrile) blend. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2007.11.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pashkuleva I, Azevedo HS, Reis RL. Surface Structural Investigation of Starch-Based Biomaterials. Macromol Biosci 2007; 8:210-9. [PMID: 17849430 DOI: 10.1002/mabi.200700076] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Surface structural characterisation of three different starch-based blends (with poly[ethylene-co-(vinyl alcohol)], cellulose acetate and polycaprolactone) was carried out. The results show that there is a difference between the bulk and the surface composition of all studied blends. Two different hypotheses were investigated - predominant presence of a synthetic component on the surface and possible inter- and/or intramolecular bonds. The results were related to previous data for cell behaviour on those materials. It was found that both surface hydrophilicity and surface functionality are of great importance for cell adhesion and growth on starch-based biomaterials.
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Affiliation(s)
- Iva Pashkuleva
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Xu J, Liu ZL, Zhuo RX. Synthesis and biodegradability evaluation of 2-methylene-1,3-dioxepane and styrene copolymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.25321] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Wu CS. A comparison of the structure, thermal properties, and biodegradability of polycaprolactone/chitosan and acrylic acid grafted polycaprolactone/chitosan. POLYMER 2005. [DOI: 10.1016/j.polymer.2004.11.013] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Park SJ, Yang YJ, Lee HB. Effect of acid–base interaction between silica and fragrant oil in the PCL/PEG microcapsules. Colloids Surf B Biointerfaces 2004; 38:35-40. [PMID: 15465302 DOI: 10.1016/j.colsurfb.2004.08.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2004] [Revised: 08/18/2004] [Accepted: 08/18/2004] [Indexed: 11/20/2022]
Abstract
In this work, the biodegradable poly(epsilon-caprolactone) (PCL)/poly(ethylene glycol) (PEG) microcapsules were prepared in the presence of SiO(2) and fragrant oil using emulsion solvent evaporation method. And SiO(2) was chemically treated in 30 wt.% hydrochloric acid and sodium hydroxide. The effect of chemical treatment on SiO(2) surfaces was studied in terms of pH, acid-base value, and N(2)/77 K gas adsorption. Image analyzer and scanning electron microscope (SEM) were used to observe the shape and surface change of the prepared microcapsules. And the variation of surface free energy of microcapsules was characterized by contact angles. The results showed that the average diameter, surface free energy, and fragrant oil release rate of microcapsules were increased with increasing the PEG ratio. Also, it was found that in the case of basic treated SiO(2), the fragrant oil adsorption capacity and release rate were decreased due to the decrease of specific surface area or the increase of acid-base interactions between basic SiO(2) and acidic fragrant oil.
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Affiliation(s)
- Soo-Jin Park
- Advanced Materials Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusong, Daejeon 305-600, Korea.
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Lee J, Cho EC, Cho K. Incorporation and release behavior of hydrophobic drug in functionalized poly(d,l-lactide)-block–poly(ethylene oxide) micelles. J Control Release 2004; 94:323-35. [PMID: 14744484 DOI: 10.1016/j.jconrel.2003.10.012] [Citation(s) in RCA: 154] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The poly(ethylene oxide)-poly(lactide) (PEO-PLA) block copolymers containing a small quantity of carboxylic acid in the PLA block were synthesized. The microscopic characteristics of nanoparticles with carboxylic acid content in the copolymer were analyzed, and the effect of specific interactions between the copolymer and the model drug on the drug loading capacity and the release behavior were investigated systematically. The sizes of nanoparticles prepared by a dialysis method are within the range of 30-40 nm. The nanoparticles prepared from functionalized block copolymers have a very low critical micelle concentration (CMC) value as low as approximately 10(-3) mg/ml, which indicates a good stability of the nanoparticles in spite of the presence of carboxylic acid. The drug loading efficiency of nanoparticles dramatically increased when carboxylic acid content was increased in the block copolymer. This result may be attributed to the increase of interactions between the copolymer and the drug. The release rate of the drug was much slower from nanoparticles containing higher amounts of carboxylic acid in the copolymer, which might be associated with the enhanced interaction between the carboxylic group of copolymers and the drug. These experimental results suggest that the nanoparticles prepared from functionalized PEO-PLA block copolymers could be a good candidate for an injectable drug delivery carrier.
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Affiliation(s)
- Jaeyoung Lee
- Department of Chemical Engineering, School of Environmental Engineering, Pohang University of Science and Technology, 790-784 Pohang, South Korea
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Jeong JC, Lee J, Cho K. Effects of crystalline microstructure on drug release behavior of poly(ε-caprolactone) microspheres. J Control Release 2003; 92:249-58. [PMID: 14568406 DOI: 10.1016/s0168-3659(03)00367-5] [Citation(s) in RCA: 136] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study investigates the release behavior of papaverine from poly(epsilon-caprolactone) (PCL) microparticles prepared by the oil/water solvent evaporation method. Microparticles were characterized in terms of crystalline morphology, size, drug loading, and encapsulation efficiency by using differential scanning calorimetry (DSC), small angle X-ray scattering (SAXS), scanning electron microscopy (SEM), and UV spectrometry. The release behavior of papaverine was governed by the microstructure of PCL microparticles, suggesting that the environment for diffusion changes according to processing conditions such as polymer solution concentration, thermal history, and polymer molecular weight. As the PCL solution concentration increased, the drug release behavior showed a more sustained pattern. This result indicates that the size of the PCL microparticles is a determining factor for drug release. And when higher PCL molecular weight is used for preparation of microparticles, it led to a rapid release. Furthermore, a more delayed pattern of drug release profile was obtained in the sample prepared with higher thermal treatment. These results suggest that the crystalline microstructure of PCL microparticles plays an important role in its drug release behavior.
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Affiliation(s)
- Jong-Cheol Jeong
- Department of Chemical Engineering, School of Environmental Engineering, Polymer Research Institute, Pohang University of Science and Technology, Pohang 790-784, South Korea
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