1
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Raczyńska A, Góra A, André I. An overview on polyurethane-degrading enzymes. Biotechnol Adv 2024; 77:108439. [PMID: 39241969 DOI: 10.1016/j.biotechadv.2024.108439] [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: 05/31/2024] [Revised: 08/26/2024] [Accepted: 09/02/2024] [Indexed: 09/09/2024]
Abstract
Polyurethanes (PUR) are durable synthetic polymers widely used in various industries, contributing significantly to global plastic consumption. PUR pose unique challenges in terms of degradability and recyclability, as they are characterised by intricate compositions and diverse formulations. Additives and proprietary structures used in commercial PUR formulations further complicate recycling efforts, making the effective management of PUR waste a daunting task. In this review, we delve into the complex challenge of enzymatic degradation of PUR, focusing on the structural and functional attributes of both enzymes and PUR. We also present documented native enzymes with reported efficacy in hydrolysing specific bonds within PUR, analysis of these enzyme structures, reaction mechanisms, substrate specificity, and binding site architecture. Furthermore, we propose essential features for the future redesign of enzymes to optimise PUR biodegradation efficiency. By outlining prospective research directions aimed at advancing the field of enzymatic biodegradation of PUR, we aim to contribute to the development of sustainable solutions for managing PUR waste and reducing environmental pollution.
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Affiliation(s)
- Agata Raczyńska
- Tunneling Group, Biotechnology Centre, Silesian University of Technology, ul. Krzywoustego 8, 44-100 Gliwice, Poland; Toulouse Biotechnology Institute, TBI, Université de Toulouse, CNRS, INRAE, INSA, 135 avenue de Rangueil, F-31077 Toulouse Cedex, France; Faculty of Chemistry, Silesian University of Technology, ul. Strzody 9, 44-100 Gliwice, Poland
| | - Artur Góra
- Tunneling Group, Biotechnology Centre, Silesian University of Technology, ul. Krzywoustego 8, 44-100 Gliwice, Poland.
| | - Isabelle André
- Toulouse Biotechnology Institute, TBI, Université de Toulouse, CNRS, INRAE, INSA, 135 avenue de Rangueil, F-31077 Toulouse Cedex, France.
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2
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Khan M. Chemical and Physical Architecture of Macromolecular Gels for Fracturing Fluid Applications in the Oil and Gas Industry; Current Status, Challenges, and Prospects. Gels 2024; 10:338. [PMID: 38786255 PMCID: PMC11121287 DOI: 10.3390/gels10050338] [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: 03/31/2024] [Revised: 05/01/2024] [Accepted: 05/09/2024] [Indexed: 05/25/2024] Open
Abstract
Hydraulic fracturing is vital in recovering hydrocarbons from oil and gas reservoirs. It involves injecting a fluid under high pressure into reservoir rock. A significant part of fracturing fluids is the addition of polymers that become gels or gel-like under reservoir conditions. Polymers are employed as viscosifiers and friction reducers to provide proppants in fracturing fluids as a transport medium. There are numerous systems for fracturing fluids based on macromolecules. The employment of natural and man-made linear polymers, and also, to a lesser extent, synthetic hyperbranched polymers, as additives in fracturing fluids in the past one to two decades has shown great promise in enhancing the stability of fracturing fluids under various challenging reservoir conditions. Modern innovations demonstrate the importance of developing chemical structures and properties to improve performance. Key challenges include maintaining viscosity under reservoir conditions and achieving suitable shear-thinning behavior. The physical architecture of macromolecules and novel crosslinking processes are essential in addressing these issues. The effect of macromolecule interactions on reservoir conditions is very critical in regard to efficient fluid qualities and successful fracturing operations. In future, there is the potential for ongoing studies to produce specialized macromolecular solutions for increased efficiency and sustainability in oil and gas applications.
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Affiliation(s)
- Majad Khan
- Department of Chemistry, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia; ; Tel.: +966-0138601671
- Interdisciplinary Research Center for Hydrogen Technologies and Energy Storage (IRC-HTCM), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia
- Interdisciplinary Research Center for Refining and Advanced Chemicals (IRC-CRAC), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia
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3
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Nasrollahi N, Yousefpoor M, Khataee A, Vatanpour V. Polyurethane-based separation membranes: a review on fabrication techniques, applications, and future prospectives. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.09.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Di Bisceglie F, Quartinello F, Vielnascher R, Guebitz GM, Pellis A. Cutinase-Catalyzed Polyester-Polyurethane Degradation: Elucidation of the Hydrolysis Mechanism. Polymers (Basel) 2022; 14:polym14030411. [PMID: 35160402 PMCID: PMC8838978 DOI: 10.3390/polym14030411] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/10/2022] [Accepted: 01/17/2022] [Indexed: 02/01/2023] Open
Abstract
Polyurethanes (PU) are one of the most-used classes of synthetic polymers in Europe, having a considerable impact on the plastic waste management in the European Union. Therefore, they represent a major challenge for the recycling industry, which requires environmentally friendly strategies to be able to re-utilize their monomers without applying hazardous and polluting substances in the process. In this work, enzymatic hydrolysis of a polyurethane-polyester (PU-PE) copolymer using Humicola insolens cutinase (HiC) has been investigated in order to achieve decomposition at milder conditions and avoiding harsh chemicals. PU-PE films have been incubated with the enzyme at 50 °C for 168 h, and hydrolysis has been followed throughout the incubation. HiC effectively hydrolysed the polymer, reducing the number average molecular weight (Mn) and the weight average molecular weight (Mw) by 84% and 42%, respectively, as shown by gel permeation chromatography (GPC), while scanning electron microscopy showed cracks at the surface of the PU-PE films as a result of enzymatic surface erosion. Furthermore, Fourier Transform Infrared (FTIR) analysis showed a reduction in the peaks at 1725 cm−1, 1164 cm−1 and 1139 cm−1, indicating that the enzyme preferentially hydrolysed ester bonds, as also supported by the nuclear magnetic resonance spectroscopy (NMR) results. Liquid chromatography time-of-flight/mass spectrometry (LC-MS-Tof) analysis revealed the presence in the incubation supernatant of all of the monomeric constituents of the polymer, thus suggesting that the enzyme was able to hydrolyse both the ester and the urethane bonds of the polymer.
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Affiliation(s)
- Federico Di Bisceglie
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences Vienna, 3430 Tulln an der Donau, Austria; (F.D.B.); (R.V.); (G.M.G.)
| | - Felice Quartinello
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences Vienna, 3430 Tulln an der Donau, Austria; (F.D.B.); (R.V.); (G.M.G.)
- Austrian Centre of Industrial Biotechnology, 3430 Tulln an der Donau, Austria
- Correspondence: (F.Q.); (A.P.)
| | - Robert Vielnascher
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences Vienna, 3430 Tulln an der Donau, Austria; (F.D.B.); (R.V.); (G.M.G.)
| | - Georg M. Guebitz
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences Vienna, 3430 Tulln an der Donau, Austria; (F.D.B.); (R.V.); (G.M.G.)
- Austrian Centre of Industrial Biotechnology, 3430 Tulln an der Donau, Austria
| | - Alessandro Pellis
- Department of Agrobiotechnology, University of Natural Resources and Life Sciences Vienna, 3430 Tulln an der Donau, Austria; (F.D.B.); (R.V.); (G.M.G.)
- Austrian Centre of Industrial Biotechnology, 3430 Tulln an der Donau, Austria
- Dipartimento di Chimica e Chimica Industriale, Universitá degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
- Correspondence: (F.Q.); (A.P.)
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5
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Sound-absorbing porous materials: a review on polyurethane-based foams. IRANIAN POLYMER JOURNAL 2022. [DOI: 10.1007/s13726-021-01006-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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6
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Li J, He W, Lei P, Song J, Huo J, Wei H, Bai H, Xie W. 2,2,2-Trifluroenthanol promoted synthesis of unsymmetrical ureas from dioxazolones and amines via tandem lossen rearrangement/condensation process. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1983605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Jian Li
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Wang He
- Engineeing Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps Basin, Tarim University, Alar, China
| | - Pan Lei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Jiacheng Song
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Jiyou Huo
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Hongjin Bai
- Engineeing Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps Basin, Tarim University, Alar, China
| | - Weiqing Xie
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling, Shaanxi, P. R. China
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7
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Gajbhiye KR, Chaudhari BP, Pokharkar VB, Pawar A, Gajbhiye V. Stimuli-responsive biodegradable polyurethane nano-constructs as a potential triggered drug delivery vehicle for cancer therapy. Int J Pharm 2020; 588:119781. [DOI: 10.1016/j.ijpharm.2020.119781] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/28/2020] [Accepted: 08/14/2020] [Indexed: 12/21/2022]
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8
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Alakbari FS, Mohyaldinn ME, Muhsan AS, Hasan N, Ganat T. Chemical Sand Consolidation: From Polymers to Nanoparticles. Polymers (Basel) 2020; 12:polym12051069. [PMID: 32392770 PMCID: PMC7284768 DOI: 10.3390/polym12051069] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 04/29/2020] [Indexed: 11/16/2022] Open
Abstract
The chemical sand consolidation methods involve pumping of chemical materials, like furan resin and silicate non-polymer materials into unconsolidated sandstone formations, in order to minimize sand production with the fluids produced from the hydrocarbon reservoirs. The injected chemical material, predominantly polymer, bonds sand grains together, lead to higher compressive strength of the rock. Hence, less amounts of sand particles are entrained in the produced fluids. However, the effect of this bonding may impose a negative impact on the formation productivity due to the reduction in rock permeability. Therefore, it is always essential to select a chemical material that can provide the highest possible compressive strength with minimum permeability reduction. This review article discusses the chemical materials used for sand consolidation and presents an in-depth evaluation between these materials to serve as a screening tool that can assist in the selection of chemical sand consolidation material, which in turn, helps optimize the sand control performance. The review paper also highlights the progressive improvement in chemical sand consolidation methods, from using different types of polymers to nanoparticles utilization, as well as track the impact of the improvement in sand consolidation efficiency and production performance. Based on this review, the nanoparticle-related martials are highly recommended to be applied as sand consolidation agents, due to their ability to generate acceptable rock strength with insignificant reduction in rock permeability.
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Affiliation(s)
- Fahd Saeed Alakbari
- Petroleum Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Perak, Malaysia; (F.S.A.); (A.S.M.); (T.G.)
| | - Mysara Eissa Mohyaldinn
- Petroleum Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Perak, Malaysia; (F.S.A.); (A.S.M.); (T.G.)
- Correspondence:
| | - Ali Samer Muhsan
- Petroleum Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Perak, Malaysia; (F.S.A.); (A.S.M.); (T.G.)
| | - Nurul Hasan
- Petroleum & Chemical Engineering, Universiti Teknologi Brunei, Gadong BE1410, Brunei;
| | - Tarek Ganat
- Petroleum Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Perak, Malaysia; (F.S.A.); (A.S.M.); (T.G.)
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9
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Wu Y, Tian B, Witzel S, Jin H, Tian X, Rudolph M, Rominger F, Hashmi ASK. AuBr 3 -Catalyzed Chemoselective Annulation of Isocyanates with 2H-Azirine. Chemistry 2019; 25:4093-4099. [PMID: 30370953 DOI: 10.1002/chem.201804765] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Indexed: 01/19/2023]
Abstract
The chemoselective cyclization of isocyanates with 2H-azirine was achieved with AuBr3 as catalyst. This transfer sets the stage for the synthesis of aromatic oxazole-ureas in a tandem process. The addition of a catalytic amount of phosphite enhances the process enormously. The reaction can also be performed in a one-pot process using benzoyl azide instead of isocyanate under the same conditions. A detailed study on the role of the phosphite that was applied as an additive revealed that only non-coordinated phosphite can reduce gold(III) and that gold(I) coordinated phosphite is not oxidized. Accompanied by the reduction of gold, HBr is generated in situ, which turned out to be the actual promotor in combination with the remaining AuBr3 . The positive effect of acid can be explained by a strong N-Au coordination, which tends to break more easily in the presence of small amount of protic acid in the reaction solution.
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Affiliation(s)
- Yufeng Wu
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Bing Tian
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Sina Witzel
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hongming Jin
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Xianhai Tian
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Chemistry Department, Faculty of Science, King Abdulaziz University (KAU), 21589, Jeddah, Saudi Arabia
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10
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Hurrle S, Goldmann AS, Gliemann H, Mutlu H, Barner-Kowollik C. Light-Induced Step-Growth Polymerization of AB-Type Photo-Monomers at Ambient Temperature. ACS Macro Lett 2018; 7:201-207. [PMID: 35610893 DOI: 10.1021/acsmacrolett.7b01001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We introduce two AB-type monomers able to undergo a facile catalyst-free photoinduced polycycloaddition of photocaged dienes, enabling rapid Diels-Alder ligations under UV-irradiation (λmax = 350 nm) at ambient temperature, closely adhering to Carother's equation established by a careful kinetic study (17800 g mol-1 < Mw < 24700 g mol-1). The resulting macromolecules were in-depth analyzed via size exclusion chromatography (SEC) and nuclear magnetic resonance (NMR) spectroscopy. Additionally, SEC hyphenated to high resolution-electrospray ionization-mass spectrometry (HR-ESI-MS) enabled the careful mapping of the end group structure of the generated polymers. Furthermore, we demonstrate that both monomer systems can be readily copolymerized. The study thus demonstrates that Diels-Alder ligation resting upon photocaged dienes is a powerful tool for accessing step-growth polymers.
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Affiliation(s)
- Silvana Hurrle
- Macromolecular
Architectures, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
| | - Anja S. Goldmann
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, QLD 4000, Brisbane, Australia
- Macromolecular
Architectures, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
| | - Hartmut Gliemann
- Institut
für Funktionelle Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Karlsruhe, Germany
| | - Hatice Mutlu
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, QLD 4000, Brisbane, Australia
- Soft
Matter Synthesis Laboratory, Institut für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christopher Barner-Kowollik
- School
of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), 2 George Street, QLD 4000, Brisbane, Australia
- Macromolecular
Architectures, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany
- Soft
Matter Synthesis Laboratory, Institut für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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11
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Jiang L, Hu H. Finite Element Modeling of Multilayer Orthogonal Auxetic Composites under Low-Velocity Impact. MATERIALS 2017; 10:ma10080908. [PMID: 28783054 PMCID: PMC5578274 DOI: 10.3390/ma10080908] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/14/2017] [Accepted: 08/02/2017] [Indexed: 11/22/2022]
Abstract
The multilayer orthogonal auxetic composites have been previously developed and tested to prove that they own excellent energy absorption and impact protection characteristics in a specific strain range under low-velocity impact. In this study, a three dimensional finite element (FE) model in ANSYS LS-DYNA was established to simulate the mechanical behavior of auxetic composites under low-velocity drop-weight impact. The simulation results including the Poisson’s ratio versus compressive strain curves and the contact stress versus compressive strain curves were compared with those in the experiments. The clear deformation pictures of the FE models have provided a simple and effective way for investigating the damage mechanism and optimizing the material, as well as structure design.
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Affiliation(s)
- Lili Jiang
- Institute of Textile and Clothing, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Hong Hu
- Institute of Textile and Clothing, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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12
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Song EH, Jeong SH, Park JU, Kim S, Kim HE, Song J. Polyurethane-silica hybrid foams from a one-step foaming reaction, coupled with a sol-gel process, for enhanced wound healing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017. [PMID: 28629091 DOI: 10.1016/j.msec.2017.05.041] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Polyurethane (PU)-based dressing foams have been widely used due to their excellent water absorption capability, optimal mechanical properties, and unequaled economic advantage. However, the low bioactivity and poor healing capability of PU limit the applications of PU dressings in complex wound healing cases. To resolve this problem, this study was carried out the hybridization of bioactive silica nanoparticles with PU through a one-step foaming reaction that is coupled with the sol-gel process. The hybridization with silica did not affect the intrinsically porous microstructure of PU foams with silica contents of up to 10wt% and where 5-60nm silica nanoparticles were well dispersed in the PU matrix, despite slight agglomerations. The incorporated silica enhanced the mechanical performance of PU by proffering better flexibility and durability as well as maintaining good water absorption capabilities and the WVTR characteristics of pure PU foam. The silica of PU-10wt% Si foams was gradually dissolved and released under physiological conditions during a 14-day immersion period. The in vitro cell attachment and proliferation tests showed significant improvements in terms of the biocompatibility of PU-Si hybrid foams and demonstrated the effects of silica on cell growth. More significantly, the superior healing capability of PU-Si as a wound dressing in comparison to PU-treated wounds was verified through in vivo animal tests. Full-thickness wounds treated with PU-Si foams exhibited faster wound closure rates as well as accelerated collagen and elastin fiber regeneration in newly formed dermis, which was ultimately completely covered by a new epithelial layer. It is clear that PU-Si hybrid foams have considerable potential as a wound dressing material geared for accelerated, superior wound healing.
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Affiliation(s)
- Eun-Ho Song
- Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Seol-Ha Jeong
- Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Ji-Ung Park
- Department of Plastic and Reconstructive Surgery, Seoul National University Boramae Hospital, 5 Gil 20, Boramae-ro, Dongjak-Gu, Seoul 156-707, Republic of Korea
| | - Sukwha Kim
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea
| | - Hyoun-Ee Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea; Advanced Institutes of Convergence Technology, Seoul National University, Gwanggyo, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-270, Republic of Korea.
| | - Juha Song
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637457, Singapore.
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13
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Akindoyo JO, Beg MDH, Ghazali S, Islam MR, Jeyaratnam N, Yuvaraj AR. Polyurethane types, synthesis and applications – a review. RSC Adv 2016. [DOI: 10.1039/c6ra14525f] [Citation(s) in RCA: 655] [Impact Index Per Article: 81.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Polyurethanes (PUs) are a class of versatile materials with great potential for use in different applications, especially based on their structure–property relationships.
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Affiliation(s)
- John O. Akindoyo
- Faculty of Chemical and Natural Resources Engineering
- Universiti Malaysia Pahang Lebuhraya Tun Razak
- Kuantan
- Malaysia
| | - M. D. H. Beg
- Faculty of Chemical and Natural Resources Engineering
- Universiti Malaysia Pahang Lebuhraya Tun Razak
- Kuantan
- Malaysia
| | - Suriati Ghazali
- Faculty of Chemical and Natural Resources Engineering
- Universiti Malaysia Pahang Lebuhraya Tun Razak
- Kuantan
- Malaysia
| | - M. R. Islam
- Malaysian Institute of Chemical and Bioengineering Technology
- University of Kuala Lumpur
- Melaka
- Malaysia
| | - Nitthiyah Jeyaratnam
- Faculty of Chemical and Natural Resources Engineering
- Universiti Malaysia Pahang Lebuhraya Tun Razak
- Kuantan
- Malaysia
| | - A. R. Yuvaraj
- Faculty of Industrial Sciences and Technology
- Universiti Malaysia Pahang Lebuhraya Tun Razak
- Kuantan
- Malaysia
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14
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Yang W, Sun X, Yu W, Rai R, Deschamps JR, Mitchell LA, Jiang C, MacKerell AD, Xue F. Facile Synthesis of Spirocyclic Lactams from β-Keto Carboxylic Acids. Org Lett 2015; 17:3070-3. [DOI: 10.1021/acs.orglett.5b01350] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Yang
- Department
of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Xianyu Sun
- Department
of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Wenbo Yu
- Department
of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Rachita Rai
- Department
of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Jeffrey R. Deschamps
- Naval Research
Laboratory, Code 6930, 4555 Overlook
Avenue, Washington, D.C. 20375, United States
| | - Lauren A. Mitchell
- Naval Research
Laboratory, Code 6930, 4555 Overlook
Avenue, Washington, D.C. 20375, United States
| | - Chao Jiang
- Department
of Pharmaceutical Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - Alexander D. MacKerell
- Department
of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Fengtian Xue
- Department
of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
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15
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Maouati H, Sanhoury MAK, Merlet D, Chehidi I. Bis(thiocarbamates): Synthesis and Substituent Effects on the Barrier to N-CO Rotation. HETEROATOM CHEMISTRY 2015. [DOI: 10.1002/hc.21272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hamida Maouati
- Laboratory of Structural Organic Chemistry; Department of Chemistry; Faculty of Sciences of Tunis; University of Tunis El Manar; Tunis 2092 Tunisia
| | - M. A. K. Sanhoury
- Laboratory of Structural Organic Chemistry; Department of Chemistry; Faculty of Sciences of Tunis; University of Tunis El Manar; Tunis 2092 Tunisia
| | - D. Merlet
- Equipe de RMN en Milieu Orienté; ICMMO UMR CNRS 8182; Université Paris-Sud; ORSAY Cedex 91405 France
| | - I. Chehidi
- Laboratory of Structural Organic Chemistry; Department of Chemistry; Faculty of Sciences of Tunis; University of Tunis El Manar; Tunis 2092 Tunisia
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16
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