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Zhao XT, Men YF. Thermal Fractionation of Polyolefins: Brief History, New Developments and Future Perspective. POLYMER SCIENCE SERIES A 2022. [DOI: 10.1134/s0965545x22700419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
For semi-crystalline polymer materials, the difference in chain structure often leads to different physical properties; therefore, in-depth analysis of the chain structure is of great significance. With the continuous development of advanced instruments, many research means have emerged to characterize the structure of molecular chains. Among them, fractionation techniques provide effectively structural information on inter- and intra-molecular comonomer distribution, branching degree, and sequence length, etc. This work briefly presents the history of developments of various classical fractionation means such as temperature-rising elution fractionation, stepwise crystallization and successive self-nucleation and annealing, while focusing on the present and future of their applications.
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Blood-Vessel-Inspired Hierarchical Trilayer Scaffolds: PCL/Gelatin-Driven Protein Adsorption and Cellular Interaction. Polymers (Basel) 2022; 14:polym14112135. [PMID: 35683808 PMCID: PMC9182901 DOI: 10.3390/polym14112135] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/06/2022] [Accepted: 05/11/2022] [Indexed: 12/23/2022] Open
Abstract
Fabrication of scaffolds with hierarchical structures exhibiting the blood vessel topological and biochemical features of the native extracellular matrix that maintain long-term patency remains a major challenge. Within this context, scaffold assembly using biodegradable synthetic polymers (BSPs) via electrospinning had led to soft-tissue-resembling microstructures that allow cell infiltration. However, BSPs fail to exhibit the sufficient surface reactivity, limiting protein adsorption and/or cell adhesion and jeopardizing the overall graft performance. Here, we present a methodology for the fabrication of three-layered polycaprolactone (PCL)-based tubular structures with biochemical cues to improve protein adsorption and cell adhesion. For this purpose, PCL was backbone-oxidized (O-PCL) and cast over a photolithography-manufactured microgrooved mold to obtain a bioactive surface as demonstrated using a protein adsorption assay (BSA), Fourier transform infrared spectroscopy (FTIR) and calorimetric analyses. Then, two layers of PCL:gelatin (75:25 and 95:5 w/w), obtained using a novel single-desolvation method, were electrospun over the casted O-PCL to mimic a vascular wall with a physicochemical gradient to guide cell adhesion. Furthermore, tensile properties were shown to withstand the physiological mechanical stresses and strains. In vitro characterization, using L929 mouse fibroblasts, demonstrated that the multilayered scaffold is a suitable platform for cell infiltration and proliferation from the innermost to the outermost layer as is needed for vascular wall regeneration. Our work holds promise as a strategy for the low-cost manufacture of next-generation polymer-based hierarchical scaffolds with high bioactivity and resemblance of ECM’s microstructure to accurately guide cell attachment and proliferation.
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Nivedita S, Joseph S. Performance of polycaprolactone/TiO 2 composite membrane for the effective treatment of dairy effluents. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:2477-2485. [PMID: 34032624 DOI: 10.2166/wst.2021.143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This work is the first, to the best of our knowledge, to use polycaprolactone (PCL)-based membrane for the treatment of dairy wastewater. PCL is a biodegradable polymer with high biocompatibility and good oil resistance. The chlorine tolerance analysis of PCL-based membranes exhibited a good tolerance against chlorine. The PCL/TiO2 nanocomposite membrane with the addition of polyethylene glycol was prepared and tested for protein separation. The dependency of contact angle with time was analysed for the membrane, and the contact angle value reduced from 74.5 ± 2° to a steady value of 65 ± 2° in 120 s. The proteins were removed using a cross-flow filtration unit at an operating pressure of 0.4 MPa at room temperature with permeate flux of 10 L/m2 h and a relative permeate flux of about 0.10. The removal of proteins was measured qualitatively using native polyacrylamide gel electrophoresis (PAGE) and quantitatively using Lowry's test. A percentage rejection of 97.6 was obtained and the native PAGE showed the complete removal of all the major proteins present in the milk sample.
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Affiliation(s)
- Sankar Nivedita
- Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India E-mail:
| | - Shiny Joseph
- Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India E-mail:
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Amini Moghaddam M, Di Martino A, Šopík T, Fei H, Císař J, Pummerová M, Sedlařík V. Polylactide/Polyvinylalcohol-Based Porous Bioscaffold Loaded with Gentamicin for Wound Dressing Applications. Polymers (Basel) 2021; 13:921. [PMID: 33802770 PMCID: PMC8002437 DOI: 10.3390/polym13060921] [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: 02/19/2021] [Revised: 03/15/2021] [Accepted: 03/15/2021] [Indexed: 12/26/2022] Open
Abstract
This study explores the feasibility of modifying the surface liquid spraying method to prepare porous bioscaffolds intended for wound dressing applications. For this purpose, gentamicin sulfate was loaded into polylactide-polyvinyl alcohol bioscaffolds as a highly soluble (hygroscopic) model drug for in vitro release study. Moreover, the influence of inorganic salts including NaCl (10 g/L) and KMnO4 (0.4 mg/L), and post-thermal treatment (T) (80 °C for 2 min) on the properties of the bioscaffolds were studied. The bioscaffolds were characterized by scanning electron microscopy, Fourier Transform infrared spectroscopy, and differential scanning calorimetry. In addition, other properties including porosity, swelling degree, water vapor transmission rate, entrapment efficiency, and the release of gentamicin sulfate were investigated. Results showed that high concentrations of NaCl (10 g/L) in the aqueous phase led to an increase of around 68% in the initial burst release due to the increase in porosity. In fact, porosity increased from 68.1 ± 1.2 to 94.1 ± 1.5. Moreover, the thermal treatment of the Polylactide-polyvinyl alcohol/NaCl (PLA-PVA/NaCl) bioscaffolds above glass transition temperature (Tg) reduced the initial burst release by approximately 11% and prolonged the release of the drug. These results suggest that thermal treatment of polymer above Tg can be an efficient approach for a sustained release.
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Affiliation(s)
| | | | | | | | | | | | - Vladimír Sedlařík
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, tr. Tomase Bati 5678, 760 01 Zlin, Czech Republic; (M.A.M.); (A.D.M.); (T.Š.); (H.F.); (J.C.); (M.P.)
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Romero-Montero A, Del Valle LJ, Puiggalí J, Montiel C, García-Arrazola R, Gimeno M. Poly(gallic acid)-coated polycaprolactone inhibits oxidative stress in epithelial cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 115:111154. [PMID: 32600735 DOI: 10.1016/j.msec.2020.111154] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 05/28/2020] [Accepted: 06/02/2020] [Indexed: 11/19/2022]
Abstract
Enzymatic mediated poly (gallic acid) (PGAL), a stable multiradical polyanion with helicoidal secondary structure and high antioxidant capacity, was successfully grafted to poly(ε-caprolactone) (PCL) using UV-photo induction. PCL films were prepared with several levels of roughness and subsequently grafted with PGAL (PCL-g-PGAL). The results on the full characterization of the produced materials by mechanical tests, surface morphology, and topography, thermal and crystallographic analyses, as well as wettability and cell protection activity against oxidative stress, were adequate for tissue regeneration. The in vitro biocompatibility was then assessed with epithelial-like cells showing excellent adhesion and proliferation onto the PCL-g-PGAL films, most importantly, PCL-g-PGAL displayed a good ability to protect cell cultures on their surface against reactive oxygen species. These biomaterials can consequently be considered as novel biocompatible and antioxidant films with high-responsiveness for biomedical or tissue engineering applications.
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Affiliation(s)
- Alejandra Romero-Montero
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Luis J Del Valle
- Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, Barcelona, Spain
| | - Jordi Puiggalí
- Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, Barcelona, Spain; Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, 08028 Barcelona, Spain
| | - Carmina Montiel
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Roeb García-Arrazola
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico
| | - Miquel Gimeno
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, 04510 CDMX, Mexico.
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Samsudin N, Hashim YZHY, Arifin MA, Mel M, Salleh HM, Sopyan I, Jimat DN. Optimization of ultraviolet ozone treatment process for improvement of polycaprolactone (PCL) microcarrier performance. Cytotechnology 2017; 69:601-616. [PMID: 28337561 DOI: 10.1007/s10616-017-0071-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/24/2017] [Indexed: 02/01/2023] Open
Abstract
Growing cells on microcarriers may have overcome the limitation of conventional cell culture system. However, the surface functionality of certain polymeric microcarriers for effective cell attachment and growth remains a challenge. Polycaprolactone (PCL), a biodegradable polymer has received considerable attention due to its good mechanical properties and degradation rate. The drawback is the non-polar hydrocarbon moiety which makes it not readily suitable for cell attachment. This report concerns the modification of PCL microcarrier surface (introduction of functional oxygen groups) using ultraviolet irradiation and ozone (UV/O3) system and investigation of the effects of ozone concentration, the amount of PCL and exposure time; where the optimum conditions were found to be at 60,110.52 ppm, 5.5 g PCL and 60 min, respectively. The optimum concentration of carboxyl group (COOH) absorbed on the surface was 1495.92 nmol/g and the amount of gelatin immobilized was 320 ± 0.9 µg/g on UV/O3 treated microcarriers as compared to the untreated (26.83 ± 3 µg/g) microcarriers. The absorption of functional oxygen groups on the surface and the immobilized gelatin was confirmed with the attenuated total reflectance Fourier transformed infrared spectroscopy (ATR-FTIR) and the enhancement of hydrophilicity of the surface was confirmed using water contact angle measurement which decreased (86.93°-49.34°) after UV/O3 treatment and subsequently after immobilization of gelatin. The attachment and growth kinetics for HaCaT skin keratinocyte cells showed that adhesion occurred much more rapidly for oxidized surfaces and gelatin immobilized surface as compared to untreated PCL.
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Affiliation(s)
- Nurhusna Samsudin
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
| | - Yumi Zuhanis Has-Yun Hashim
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia. .,International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Level 3, KICT Building, P.O. Box 10, 50728, Kuala Lumpur, Malaysia.
| | - Mohd Azmir Arifin
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia.,Faculty of Engineering Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia
| | - Maizirwan Mel
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
| | - Hamzah Mohd Salleh
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia. .,International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Level 3, KICT Building, P.O. Box 10, 50728, Kuala Lumpur, Malaysia.
| | - Iis Sopyan
- Department of Manufacturing and Material Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
| | - Dzun Noraini Jimat
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
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Kósa C, Sedlačík M, Fiedlerová A, Chmela Š, Borská K, Mosnáček J. Photochemically cross-linked poly(ε-caprolactone) with accelerated hydrolytic degradation. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.03.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Müller A, Michell R, Pérez R, Lorenzo A. Successive Self-nucleation and Annealing (SSA): Correct design of thermal protocol and applications. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.01.015] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Garin M, Tighzert L, Vroman I, Marinkovic S, Estrine B. The influence of molar mass on rheological and dilute solution properties of poly(butylene succinate). J Appl Polym Sci 2014. [DOI: 10.1002/app.40887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Matthieu Garin
- Laboratoire LISM; UFR Sciences Exactes et Naturelles, BATIMENT 6, Moulin de la Housse; BP 1039 51687 Reims Cedex 2 France
| | - Lan Tighzert
- Laboratoire LISM; UFR Sciences Exactes et Naturelles, BATIMENT 6, Moulin de la Housse; BP 1039 51687 Reims Cedex 2 France
| | - Isabelle Vroman
- Laboratoire LISM; UFR Sciences Exactes et Naturelles, BATIMENT 6, Moulin de la Housse; BP 1039 51687 Reims Cedex 2 France
| | - Sinisa Marinkovic
- Agro-Industries Recherches et Développements (ARD); Route de Bazancourt 51110 Pomacle France
| | - Boris Estrine
- Agro-Industries Recherches et Développements (ARD); Route de Bazancourt 51110 Pomacle France
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Chu L, Wang J. Denitrification performance and biofilm characteristics using biodegradable polymers PCL as carriers and carbon source. CHEMOSPHERE 2013; 91:1310-1316. [PMID: 23545191 DOI: 10.1016/j.chemosphere.2013.02.064] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 02/22/2013] [Accepted: 02/25/2013] [Indexed: 06/02/2023]
Abstract
In this study, a fixed bed bioreactor filled with biopolymer polycaprolactone (PCL) was developed to remove nitrate from groundwater through denitrification. PCL serves both as carbon source and biofilm carriers. During a long-term operation of 561 d, the performance of the reactor in nitrogen removal, characteristics of biofilm attached to biodegradable carriers, and the hydrolysis and utilization of solid carbon source were studied. With temperatures exceeding 24 °C, the average nitrate concentration in the effluent was lower than 3.7 mg NL(-1), and more than 95% of TN was removed at hydraulic retention time of 3-6h. Nitrite and ammonium remained at low levels (less than 0.32 and 0.78 mg NL(-1), respectively). The calculated PCL amount consumed ranged between 1.6 and 3.7 g PCL g(-1) NO₃-N. The FT-IR spectrum of the used PCL indicated the chain scission by hydrolytic degradation. A pyrosequencing analysis of the biofilm showed that genus Diaphorobacter belonging to family Comamonadaceae accounted for most of the sequences. Bacteria of genera Hydrogenophaga, Rhodocyclaceae uncultured and Desulfovibrio were highly enriched in the PCL biofilm. Microelectrode data indicated that the biofilm had an average thickness of around 800 μm and the intensive denitrification activities occurred in the area of 300-500 μm of biofilm with values up to 400 μmol cm(-3)h(-1).
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Affiliation(s)
- Libing Chu
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China
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Gauthier E, Laycock B, Cuoq FM, Halley P, George K. Correlation between chain microstructural changes and embrittlement of LLDPE-based films during photo- and thermo-oxidative degradation. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2012.08.021] [Citation(s) in RCA: 31] [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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Dash TK, Konkimalla VB. Polymeric Modification and Its Implication in Drug Delivery: Poly-ε-caprolactone (PCL) as a Model Polymer. Mol Pharm 2012; 9:2365-79. [DOI: 10.1021/mp3001952] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Tapan K. Dash
- School of Biological Sciences,
National Institute of
Science Education and Research, Institute of Physics Campus, Sainik
School, Sachivalaya marg, Bhubaneswar-751005, India
| | - V. Badireenath Konkimalla
- School of Biological Sciences,
National Institute of
Science Education and Research, Institute of Physics Campus, Sainik
School, Sachivalaya marg, Bhubaneswar-751005, India
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Ethylene Vinyl Acetate and Polycaprolactone–Organoclay Nanocomposite: Thermal, Mechanical and Morphological Properties. J Inorg Organomet Polym Mater 2011. [DOI: 10.1007/s10904-011-9460-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bai W, Li Q, Jiang LY, Zhang ZP, Zhang SL, Xiong CD. Poly(para-dioxanone)/poly(D,L-lactide) blends compatibilized with poly(D,L-lactide-co-para-dioxanone). J Appl Polym Sci 2010. [DOI: 10.1002/app.33197] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Bai W, Zhang ZP, Li Q, Chen DL, Chen HC, Zhao N, Xiong CD. Miscibility, morphology and thermal properties of poly(para-dioxanone)/poly(D,L-lactide) blends. POLYM INT 2009. [DOI: 10.1002/pi.2512] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brito Y, Sabino MA, Ronca G, Müller AJ. Changes in crystalline morphology, thermal, and mechanical properties with hydrolytic degradation of immiscible biodegradable PPDX/PCL blends. J Appl Polym Sci 2008. [DOI: 10.1002/app.28883] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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