1
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Yin W, Wang S, Bie R. A bubble-based drag model of rough sphere for the simulation of bubbling fluidized bed. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2022.118212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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2
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Wang H, Li X, Mao Z, Yang C. New invasive image velocimetry applicable to dense multiphase flows and its application in solid–liquid suspensions. AIChE J 2019. [DOI: 10.1002/aic.16668] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Haoliang Wang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
- School of Chemical EngineeringUniversity of Chinese Academy of Sciences Beijing China
| | - Xiangyang Li
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
| | - Zai‐Sha Mao
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
| | - Chao Yang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
- School of Chemical EngineeringUniversity of Chinese Academy of Sciences Beijing China
- Green Manufacture InstituteChinese Academy of Sciences Beijing China
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3
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Makaryan IA, Kostin AY, Sedov IV. Development of Functional Polymer Coatings Using Supercritical Fluids: Technologies, Markets, and Prospects. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2019. [DOI: 10.1134/s1990793118070084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Prosapio V, De Marco I, Reverchon E. Supercritical antisolvent coprecipitation mechanisms. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.04.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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5
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Wang Y, Zhu LH, Chen AZ, Xu Q, Hong YJ, Wang SB. One-Step Method to Prepare PLLA Porous Microspheres in a High-Voltage Electrostatic Anti-Solvent Process. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E368. [PMID: 28773489 PMCID: PMC5503010 DOI: 10.3390/ma9050368] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 04/14/2016] [Accepted: 05/06/2016] [Indexed: 01/21/2023]
Abstract
A one-step method using a high-voltage electrostatic anti-solvent process was employed to fabricate poly-l-lactide (PLLA) porous microspheres (PMs). To address the simplification and control of the preparation process, a 2⁴ full factorial experiment was performed to optimize the operating process and analyze the effect of the factors on the morphology and aerodynamic properties of the PLLA PMs, and various characterization tests were also performed. The resulting PLLA PMs exhibited an even and porous morphology with a density less than 0.4 g/cm³, a geometric mean diameter (Dg) of 10-30 μm, an aerodynamic diameter (Da) of 1-5 μm, a fine particle fraction (FPF) of 56.3%, and a porosity of 76.2%, meeting the requirements for pulmonary drug delivery. The physicochemical characterizations reveal that no significant chemical change occurred in the PLLA during the process. An investigation of its in vitro cytotoxicity and pulmonary toxicity shows no obvious toxic response, indicating good biosafety. This study indicates that the one-step method using a high-voltage electrostatic anti-solvent process has great potential in developing an inhalable drug carrier for pulmonary drug delivery.
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Affiliation(s)
- Ying Wang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Li-Hui Zhu
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Ai-Zheng Chen
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, China.
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, China.
| | - Qiao Xu
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Yu-Juan Hong
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Shi-Bin Wang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, China.
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, China.
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6
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Osorio-Tobón JF, Carvalho PI, Rostagno MA, Petenate AJ, Meireles MAA. Precipitation of curcuminoids from an ethanolic turmeric extract using a supercritical antisolvent process. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.09.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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7
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Preparation of Nano-curcumin with Enhanced Dissolution Using Ultrasonic-Assisted Supercritical Anti-solvent Technique. INTERNATIONAL JOURNAL OF FOOD ENGINEERING 2015. [DOI: 10.1515/ijfe-2015-0105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Abstract
Curcumin is the main gradient of “Turmeric” a famous Indian spice and food additive. The marvelous nutritional and medicinal effects of curcumin made it a good alternative to some conventional drugs and food flavoring or coloring materials. However, the low solubility of curcumin is a challenging hindrance which should be seriously addressed. In this work, we prepared nano-curcumin with enhanced aqueous dispersion and dissolution rate. Ultrasonic-assisted supercritical anti-solvent (UA-SAS) technique was used to convert the commercial curcumin to uniform distributed nano-particles with the average size of 20 nm and yielding of 65%. The effect of process parameters including pressure, temperature, solution flow rate, and nature of organic solvent on the average particle size and yielding of products was investigated. The morphology, size, and crystalline pattern of processed curcumin particles were characterized by scanning electron microscopy, mean particle size analyzer, and X-ray diffraction. The champion specimen was achieved when the supercritical fluid was employed at 16 MPa and 35°C. Aqueous suspension of processed nano-curcumin can be stable for more than 2 months. In vitro dissolution experiments showed a remarkable enhancement in dissolution rate of UA-SAS-treated curcumin respecting to the commercial curcumin powder.
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Shin YC, Lee JH, Kim MJ, Park JH, Kim SE, Kim JS, Oh JW, Han DW. Biomimetic Hybrid Nanofiber Sheets Composed of RGD Peptide-Decorated PLGA as Cell-Adhesive Substrates. J Funct Biomater 2015; 6:367-78. [PMID: 26034884 PMCID: PMC4493517 DOI: 10.3390/jfb6020367] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/21/2015] [Accepted: 05/28/2015] [Indexed: 11/19/2022] Open
Abstract
In biomedical applications, there is a need for tissue engineering scaffolds to promote and control cellular behaviors, including adhesion, proliferation and differentiation. In particular, the initial adhesion of cells has a great influence on those cellular behaviors. In this study, we concentrate on developing cell-adhesive substrates applicable for tissue engineering scaffolds. The hybrid nanofiber sheets were prepared by electrospinning poly(lactic-co-glycolic acid) (PLGA) and M13 phage, which was genetically modified to enhance cell adhesion thru expressing RGD peptides on their surface. The RGD peptide is a specific motif of extracellular matrix (ECM) for integrin receptors of cells. RGD peptide-decorated PLGA (RGD-PLGA) nanofiber sheets were characterized by scanning electron microscopy, immunofluorescence staining, contact angle measurement and differential scanning calorimetry. In addition, the initial adhesion and proliferation of four different types of mammalian cells were determined in order to evaluate the potential of RGD-PLGA nanofiber sheets as cell-adhesive substrates. Our results showed that the hybrid nanofiber sheets have a three-dimensional porous structure comparable to the native ECM. Furthermore, the initial adhesion and proliferation of cells were significantly enhanced on RGD-PLGA sheets. These results suggest that biomimetic RGD-PLGA nanofiber sheets can be promising cell-adhesive substrates for application as tissue engineering scaffolds.
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Affiliation(s)
- Yong Cheol Shin
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Jong Ho Lee
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Min Jeong Kim
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Ji Hoon Park
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Sung Eun Kim
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Jin Su Kim
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Jin-Woo Oh
- Department of Nanoenergy Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
| | - Dong-Wook Han
- Department of Optics and Mechatronics Engineering, BK21+ Nano-Integrated Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea.
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9
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Preparation of polyamic acid and polyimide nanoparticles by compressed fluid antisolvent and thermal imidization. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2015.01.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Murillo-Cremaes N, Subra-Paternault P, Saurina J, Roig A, Domingo C. Compressed antisolvent process for polymer coating of drug-loaded aerogel nanoparticles and study of the release behavior. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3260-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Zabihi F, Xin N, Jia J, Chen T, Zhao Y. High Yield and High Loading Preparation of Curcumin–PLGA Nanoparticles Using a Modified Supercritical Antisolvent Technique. Ind Eng Chem Res 2014. [DOI: 10.1021/ie404215h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fatemeh Zabihi
- School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China
| | - Na Xin
- School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China
| | - Jingfu Jia
- School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China
| | - Tao Chen
- Department
of Orthopedic Surgery, Shanghai Jiaotong University Affiliated Sixth People’s Hospital, Shanghai, 200233, People’s Republic of China
| | - Yaping Zhao
- School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China
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Montes A, Baldauf E, Gordillo MD, Pereyra CM, Martínez de la Ossa EJ. Polymer encapsulation of amoxicillin microparticles by SAS process. J Microencapsul 2013; 31:16-22. [DOI: 10.3109/02652048.2013.799242] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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13
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Subra-Paternault P, Vrel D, Roy C. Coprecipitation on slurry to prepare drug–silica-polymer formulations by compressed antisolvent. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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14
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Patel J, Patil P. Preparation and characterization of amoxicillin mucoadhesive microparticles using solution-enhanced dispersion by supercritical CO2. J Microencapsul 2012; 29:398-408. [DOI: 10.3109/02652048.2012.655329] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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15
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Montes A, Gordillo M, Pereyra C, Martínez de la Ossa E. Co-precipitation of amoxicillin and ethyl cellulose microparticles by supercritical antisolvent process. J Supercrit Fluids 2011. [DOI: 10.1016/j.supflu.2011.05.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Esmaeili B, Chaouki J, Dubois C. Nanoparticle encapsulation by a polymer viain situpolymerization in supercritical conditions. POLYM ENG SCI 2011. [DOI: 10.1002/pen.22126] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Tsutsumi C, Fukukawa N, Sakafuji J, Oro K, Hata K, Nakayama Y, Shiono T. Impregnation of poly(L-lactide-ran-cyclic carbonate) copolymers with useful compounds with supercritical carbon dioxide. J Appl Polym Sci 2011. [DOI: 10.1002/app.33646] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Kiran E. Foaming strategies for bioabsorbable polymers in supercritical fluid mixtures. Part I. Miscibility and foaming of poly(l-lactic acid) in carbon dioxide+acetone binary fluid mixtures. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.05.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Roy C, Vega-González A, García-González CA, Tassaing T, Domingo C, Subra-Paternault P. Assessment of scCO2 techniques for surface modification of micro- and nanoparticles: Process design methodology based on solubility. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.05.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Controlled precipitation and purification of hemicellulose from DMSO and DMSO/water mixtures by carbon dioxide as anti-solvent. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.02.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Tenorio A, Gordillo MD, Pereyra CM, De La Ossa EJM. Supercritical Antisolvent Process Applied to the Pharmaceutical Industry. PARTICULATE SCIENCE AND TECHNOLOGY 2010. [DOI: 10.1080/02726351.2010.481589] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Alf ME, Asatekin A, Barr MC, Baxamusa SH, Chelawat H, Ozaydin-Ince G, Petruczok CD, Sreenivasan R, Tenhaeff WE, Trujillo NJ, Vaddiraju S, Xu J, Gleason KK. Chemical vapor deposition of conformal, functional, and responsive polymer films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:1993-2027. [PMID: 20544886 DOI: 10.1002/adma.200902765] [Citation(s) in RCA: 171] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Chemical vapor deposition (CVD) polymerization utilizes the delivery of vapor-phase monomers to form chemically well-defined polymeric films directly on the surface of a substrate. CVD polymers are desirable as conformal surface modification layers exhibiting strong retention of organic functional groups, and, in some cases, are responsive to external stimuli. Traditional wet-chemical chain- and step-growth mechanisms guide the development of new heterogeneous CVD polymerization techniques. Commonality with inorganic CVD methods facilitates the fabrication of hybrid devices. CVD polymers bridge microfabrication technology with chemical, biological, and nanoparticle systems and assembly. Robust interfaces can be achieved through covalent grafting enabling high-resolution (60 nm) patterning, even on flexible substrates. Utilizing only low-energy input to drive selective chemistry, modest vacuum, and room-temperature substrates, CVD polymerization is compatible with thermally sensitive substrates, such as paper, textiles, and plastics. CVD methods are particularly valuable for insoluble and infusible films, including fluoropolymers, electrically conductive polymers, and controllably crosslinked networks and for the potential to reduce environmental, health, and safety impacts associated with solvents. Quantitative models aid the development of large-area and roll-to-roll CVD polymer reactors. Relevant background, fundamental principles, and selected applications are reviewed.
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Affiliation(s)
- Mahriah E Alf
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02138, USA
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Della Porta G, Falco N, Reverchon E. NSAID drugs release from injectable microspheres produced by supercritical fluid emulsion extraction. J Pharm Sci 2010; 99:1484-99. [PMID: 19780130 DOI: 10.1002/jps.21920] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Supercritical fluid emulsion extraction is an innovative technology that uses supercritical carbon dioxide (SC-CO(2)) to extract the dispersed oily phase of an emulsion. This technology was used to produce poly-lactic-co-glycolic acid (PLGA) microspheres charged with two common NSAIDs: piroxicam (PX) and diclophenac sodium (DF). Single (O/W) and double (W/O/W) emulsions were tested and a comparative study between the characteristics of the microspheres obtained by SC-CO(2) extraction and the ones produced by conventional solvent evaporation (SE) is proposed. Varying the droplet dimensions, microspheres with mean diameters (MDs) of 1, 2, and 3 microm were obtained; however, the microspheres produced by SC-CO(2) gave always a better reproduction of the MD of original droplets because aggregation phenomena often modify the mean size and distribution of the microparticles produced by SE. Moreover, very efficient drug loadings (88% w/w of DF in PLGA using W/O/W emulsion and 97% of PX w/w in PLGA starting from O/W emulsion) were measured in the products obtained by SC-CO(2), respectively; whereas, the SE produced a drug loading of 30% in the case of double emulsion and of 70% for single emulsion. Solvent residue of 10 ppm was also measured by SC-CO(2) technology against the 600 ppm of the SE products. The release profiles of the entrapped drugs were also monitored to check the structure of the microspheres produced by this new technology.
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Affiliation(s)
- G Della Porta
- Department of Chemical and Food Engineering, University of Salerno, Via Ponte Don Melillo, 84084 Fisciano-Salerno, Italy.
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Chen AZ, Li Y, Chau FT, Lau TY, Hu JY, Zhao Z, Mok DKW. Application of organic nonsolvent in the process of solution-enhanced dispersion by supercritical CO2 to prepare puerarin fine particles. J Supercrit Fluids 2009. [DOI: 10.1016/j.supflu.2009.02.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Chen AZ, Li Y, Chen D, Hu JY. Development of core-shell microcapsules by a novel supercritical CO2 process. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:751-758. [PMID: 18987946 DOI: 10.1007/s10856-008-3633-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Accepted: 10/16/2008] [Indexed: 05/27/2023]
Abstract
5-fluorouracil-SiO(2)-poly(L-lactide) (5-Fu-SiO(2)-PLLA) microcapsules were prepared in a novel process of solution-enhanced dispersion by supercritical CO(2) (SEDS). The SiO(2) nanoparticles were loaded with 5-Fu by adsorption at the first place, then the 5-Fu-SiO(2) nanoparticles were coated with PLLA by a modified SEDS process. The resulted microcapsules were characterized by scanning electron microscope (SEM), laser diffraction particle size analyzer, Fourier transform infrared spectrometer (FTIR) and thermogravimeter-differential scanning calorimeter (TG-DSC). The drug load, encapsulation efficiency and drug release profiles were also determined. The resulted microcapsules exhibited a rather spherical shape, smooth surface, and a narrow particle size distribution with a mean particle size of 536 nm. The drug load and encapsulation efficiency of the samples were 0.18% and 80.53%, respectively, 25.05% of 5-Fu was released in the first half hour, then drug released in a sustained process, which was much slower than that of without coated by PLLA. The results indicated that the modified SEDS process could be used to produce drug-polymer microcapsules with a core-shell structure, high encapsulation efficiency and sustained drug release effect.
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Affiliation(s)
- Ai-Zheng Chen
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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26
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Chen AZ, Kang YQ, Pu XM, Yin GF, Li Y, Hu JY. Development of Fe3O4-poly(l-lactide) magnetic microparticles in supercritical CO2. J Colloid Interface Sci 2009; 330:317-22. [DOI: 10.1016/j.jcis.2008.10.085] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2008] [Revised: 10/29/2008] [Accepted: 10/30/2008] [Indexed: 11/29/2022]
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27
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TSUTSUMI C, SAKAFUJI J, OKADA M, ORO K, HATA K. Impregnation of Poly(L-lactide-ran-ε-caprolactone) Copolymers with Useful Compounds in Supercritical Carbon Dioxide. KOBUNSHI RONBUNSHU 2009. [DOI: 10.1295/koron.66.155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Zhang J, Lou J, Ilias S, Krishnamachari P, Yan J. Thermal properties of poly(lactic acid) fumed silica nanocomposites: Experiments and molecular dynamics simulations. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.02.048] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Lam UT, Mammucari R, Suzuki K, Foster NR. Processing of Iron Oxide Nanoparticles by Supercritical Fluids. Ind Eng Chem Res 2008. [DOI: 10.1021/ie070494+] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Nanostructured microspheres produced by supercritical fluid extraction of emulsions. Biotechnol Bioeng 2008; 100:1020-33. [DOI: 10.1002/bit.21845] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Marre S, Cansell F, Aymonier C. Tailor-made surface properties of particles with a hydrophilic or hydrophobic polymer shell mediated by supercritical CO2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:252-258. [PMID: 18047379 DOI: 10.1021/la702154z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Controlling the surface characteristics of inorganic materials with an organic shell is of great interest for control of the properties of the final material. A challenge is thus to be able to deposit a polymer shell with different solvation properties onto the surface of inorganic particles and to have a good control of the thickness of the organic layer without a prefunctionalization of surfaces. We demonstrate, in this paper, a method for coating silica particles (170-550 nm), used as model substrates, with either a hydrophilic (polyethylene glycol) or a hydrophobic polymer (polybutadiene hydroxy terminated) using a supercritical antisolvent process (precipitation from a compressed antisolvent). Several operating parameters were studied to control precisely the thickness of the deposited layer (from 2 to 30 nm), which was characterized using TEM, FESEM, XPS, and UV-visible techniques. This work demonstrates that supercritical antisolvent processes are powerful methods and good alternatives to conventional coating techniques toward the development of hybrid and/or core-shell nanomaterials.
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Affiliation(s)
- Samuel Marre
- Institut de Chimie de la Matière Condensée de Bordeaux, ICMCB-CNRS and ENSCPB, Université Bordeaux I, 87 avenue du docteur Albert Schweitzer, 33608 Pessac cedex, France
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Chen AZ, Pu XM, Kang YQ, Liao L, Yao YD, Yin GF. Study of poly(L-lactide) microparticles based on supercritical CO2. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2007; 18:2339-45. [PMID: 17569002 DOI: 10.1007/s10856-007-3173-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2006] [Accepted: 09/13/2006] [Indexed: 05/15/2023]
Abstract
Poly(L-lactide) (PLLA) microparticles were prepared in supercritical anti-solvent process. The effects of several key factors on surface morphology, and particle size and particle size distribution were investigated. These factors included initial drops size, saturation ratio of PLLA solution, pressure, temperature, concentration of the organic solution, the flow rate of the solution and molecular weight of PLLA. The results indicated that the saturation ratio of PLLA solution, concentration of the organic solution and flow rate of the solution played important roles on the properties of products. Various microparticles with the mean particle size ranging from 0.64 to 6.64 microm, could be prepared by adjusting the operational parameters. Fine microparticles were obtained in a process namely solution-enhanced dispersion by supercritical fluids (SEDS) process with dichloromethane/acetone mixture as solution.
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Affiliation(s)
- Ai-Zheng Chen
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610064 Sichuan, China
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Zhang J, Liang Y, Yan J, Lou J. Study of the molecular weight dependence of glass transition temperature for amorphous poly(l-lactide) by molecular dynamics simulation. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.06.030] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Tenorio A, Gordillo M, Pereyra C, de la Ossa EM. Controlled submicro particle formation of ampicillin by supercritical antisolvent precipitation. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2006.07.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dispersion and deagglomerat1on of nano-SiO2 particles with a silane modification reagent in supercritical CO2. HEMIJSKA INDUSTRIJA 2007. [DOI: 10.2298/hemind0703109s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The supercritical CO2 method was used in order to perform deagglomeration and improve the dispersion of nano-SiO2 particles. ?-Met-hacryloxypropyltrimethoxysilane was used as the surface modification reagent. The conventional method for coating nano-SiO2 particles was used as the comparison method. Considerable improvement of the dispersion and deagglomeration was found using supercritical CO2. Analysis of the TEM micrographs and DLS results showed the reduction of the average size of the agglomerates with the silane coupling reagent. Thermogravimetric analysis (TGA) showed that the particles treated in super?critical CO2 were more thermally stable than particles treated by conventional method. Encapsulation of several particles coated with the silane coupling reagent was observed in certain parts of the primary particles. A chemical reaction takes place between the modification reagent, MEMO silane, and active hydroxyl groups on the surface of the nano-SiO2 particles. A larger quantity of MEMO silane reacted using the con?ventional method instead of the supercritical method. On the other hand, the reacted silane molecules were better arranged around the particle surface in the supercritical method because of the formation of covalent or self-assembled structures. Polycondensed structures were preferentially obtained in the conventional method. This was achieved by using supercritical CO2, which has a high solvating power such as organic solvents and physical properties (low viscosity, low surface tension and high diffusion coefficient) similar to gases on the other side. These properties enable the sufficient and uniform wettability of nano-SiO2 particle surfaces. These results are important for obtaining nanofillers with improved dispersion and polymer wettability. Such nanofillers can be used to obtain composite materials with considerably improved mechanical characteristics.
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Chen AZ, Pu XM, Kang YQ, Liao L, Yao YD, Yin GF. Preparation of 5-Fluorouracil-Poly(L-lactide) Microparticles Using Solution-Enhanced Dispersion by Supercritical CO2. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200600221] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wang Y, Wang Y, Yang J, Pfeffer R, Dave R, Michniak B. The application of a supercritical antisolvent process for sustained drug delivery. POWDER TECHNOL 2006. [DOI: 10.1016/j.powtec.2006.03.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pathak P, Meziani MJ, Sun YP. Supercritical fluid technology for enhanced drug delivery. Expert Opin Drug Deliv 2005; 2:747-61. [PMID: 16296799 DOI: 10.1517/17425247.2.4.747] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The rapid advances in the development of formulation and delivery systems based on micron-sized and nanoscale drug particles will create significant benefits to the pharmaceutical industry. Complementary to traditional methods, supercritical fluid techniques have found many useful, and sometimes unique, applications in the production and processing of drug particles. In this article background information is provided on a variety of supercritical fluid techniques relevant to drug formulation and delivery, recent advances and novel applications are highlighted, and the successful development of a new supercritical fluid rapid expansion technique for producing exclusively nanoscale drug particles will be discussed. Challenges and opportunities for further development and future applications are also reviewed.
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Affiliation(s)
- Pankaj Pathak
- Clemson University, Department of Chemistry, SC 29634-0973, USA
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