1
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Bengtsson JD, Wallis JG, Browse J. Expression of Physaria longchain acyl-CoA synthetases and hydroxy fatty acid accumulation in transgenic Arabidopsis. JOURNAL OF PLANT PHYSIOLOGY 2022; 274:153717. [PMID: 35584570 PMCID: PMC9494924 DOI: 10.1016/j.jplph.2022.153717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/04/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Hydroxy fatty acids (HFA) are industrially useful chemical feedstocks that accumulate in seed-storage triacylglycerols (TAG) of several plant species, including castor (Ricinus communis) and Physaria (Physaria fendleri). For researchers, HFA also offer a unique opportunity to trace fatty acid metabolism and modification. Past work producing HFA in Arabidopsis (Arabidopsis thaliana) has demonstrated the importance of isozymes of TAG synthesis from plants that evolved to store HFA and as a result have a high degree of specificity towards HFA substrates. Castor phospholipase A2α (RcPLA2) has specificity for HFA-containing phosphatidylcholine. However, expression of RcPLA2 in HFA-accumulating Arabidopsis line CL37-PLA2 reduced HFA content of TAG. This loss was interpreted as being due to poor ability of Arabidopsis longchain acyl-CoA synthetases (LACSs) to utilize HFAs substrates. LACS enzymes are essential to activate HFA to HFA-CoA for TAG synthesis. Physaria is a close relative of Arabidopsis in the Brassicaceae family. To test the hypothesis that this close relatedness would allow Physaria LACSs to interface successfully with Arabidopsis enzymes of seed lipid metabolism and thereby restore HFA accumulation, we transformed PfLACS4 and PfLACS8 constructs into the CL37-PLA2 line. However, HFA content was not recovered, and biochemical characterization of recombinant PfLACS4 and PfLACS8 indicated that these isozymes have substrate specificities and selectivities that are similar to their Arabidopsis orthologues. These and other results pose an important question about how HFA synthesized on phosphatidylcholine can be transferred into the acyl-CoA pool for TAG synthesis.
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Affiliation(s)
- Jesse D Bengtsson
- Institute of Biological Chemistry, Washington State University, Pullman, WA, USA
| | - James G Wallis
- Institute of Biological Chemistry, Washington State University, Pullman, WA, USA
| | - John Browse
- Institute of Biological Chemistry, Washington State University, Pullman, WA, USA.
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2
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Blasio M, Balzano S. Fatty Acids Derivatives From Eukaryotic Microalgae, Pathways and Potential Applications. Front Microbiol 2021; 12:718933. [PMID: 34659147 PMCID: PMC8511707 DOI: 10.3389/fmicb.2021.718933] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/24/2021] [Indexed: 11/13/2022] Open
Abstract
The exploitation of petrochemical hydrocarbons is compromising ecosystem and human health and biotechnological research is increasingly focusing on sustainable materials from plants and, to a lesser extent, microalgae. Fatty acid derivatives include, among others, oxylipins, hydroxy fatty acids, diols, alkenones, and wax esters. They can occur as storage lipids or cell wall components and possess, in some cases, striking cosmeceutical, pharmaceutical, and nutraceutical properties. In addition, long chain (>20) fatty acid derivatives mostly contain highly reduced methylenic carbons and exhibit a combustion enthalpy higher than that of C14–20 fatty acids, being potentially suitable as biofuel candidates. Finally, being the building blocks of cell wall components, some fatty acid derivatives might also be used as starters for the industrial synthesis of different polymers. Within this context, microalgae can be a promising source of fatty acid derivatives and, in contrast with terrestrial plants, do not require arable land neither clean water for their growth. Microalgal mass culturing for the extraction and the exploitation of fatty acid derivatives, along with products that are relevant in nutraceutics (e.g., polyunsaturated fatty acids), might contribute in increasing the viability of microalgal biotechnologies. This review explores fatty acids derivatives from microalgae with applications in the field of renewable energies, biomaterials and pharmaceuticals. Nannochloropsis spp. (Eustigmatophyceae, Heterokontophyta) are particularly interesting for biotechnological applications since they grow at faster rates than many other species and possess hydroxy fatty acids and aliphatic cell wall polymers.
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Affiliation(s)
- Martina Blasio
- Department of Marine Biotechnologies, Stazione Zoologica Anton Dohrn Napoli (SZN), Naples, Italy
| | - Sergio Balzano
- Department of Marine Biotechnologies, Stazione Zoologica Anton Dohrn Napoli (SZN), Naples, Italy.,Department of Marine Microbiology and Biogeochemistry, Royal Netherlands Institute for Sea Research (NIOZ), Den Burg (Texel), Netherlands
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3
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Chakraborty I, Chatterjee K. Polymers and Composites Derived from Castor Oil as Sustainable Materials and Degradable Biomaterials: Current Status and Emerging Trends. Biomacromolecules 2020; 21:4639-4662. [PMID: 33222440 DOI: 10.1021/acs.biomac.0c01291] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Recent years have seen rapid growth in utilizing vegetable oils to derive a wide variety of polymers to replace petroleum-based polymers for minimizing environmental impact. Nonedible castor oil (CO) can be extracted from castor plants that grow easily, even in an arid land. CO is a promising source for developing several polymers such as polyurethanes, polyesters, polyamides, and epoxy-polymers. Several synthesis routes have been developed, and distinct properties of polymers have been studied for industrial applications. Furthermore, fillers and fibers, including nanomaterials, have been incorporated in these polymers for enhancing their physical, thermal, and mechanical properties. This review highlights the development of CO-based polymers and their composites with attractive properties for industrial and biomedical applications. Recent advancements in CO-based polymers and their composites are presented along with a discussion on future opportunities for further developments in diverse applications.
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Affiliation(s)
- Indranil Chakraborty
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka, India 560012
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka, India 560012
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4
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Quirino RL, Monroe K, Fleischer CH, Biswas E, Kessler MR. Thermosetting polymers from renewable sources. POLYM INT 2020. [DOI: 10.1002/pi.6132] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Rafael L Quirino
- Chemistry Department Georgia Southern University Statesboro GA USA
| | - Khristal Monroe
- Chemistry Department Georgia Southern University Statesboro GA USA
| | - Carl H Fleischer
- Chemistry Department Georgia Southern University Statesboro GA USA
| | - Eletria Biswas
- Chemistry Department Georgia Southern University Statesboro GA USA
| | - Michael R Kessler
- Department of Mechanical Engineering North Dakota State University Fargo ND USA
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5
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Pathania D, Sood S, Saini AK, Kumari S, Agarwal S, Gupta VK. Studies on anticancerious and photocatalytic activity of carboxymethyl cellulose-cl-poly(lactic acid-co-itaconic acid)/ZnO-Ag nanocomposite. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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6
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Fattahi N, Shahbazi MA, Maleki A, Hamidi M, Ramazani A, Santos HA. Emerging insights on drug delivery by fatty acid mediated synthesis of lipophilic prodrugs as novel nanomedicines. J Control Release 2020; 326:556-598. [PMID: 32726650 DOI: 10.1016/j.jconrel.2020.07.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/09/2020] [Accepted: 07/10/2020] [Indexed: 12/25/2022]
Abstract
Many drug molecules that are currently in the market suffer from short half-life, poor absorption, low specificity, rapid degradation, and resistance development. The design and development of lipophilic prodrugs can provide numerous benefits to overcome these challenges. Fatty acids (FAs), which are lipophilic biomolecules constituted of essential components of the living cells, carry out many necessary functions required for the development of efficient prodrugs. Chemical conjugation of FAs to drug molecules may change their pharmacodynamics/pharmacokinetics in vivo and even their toxicity profile. Well-designed FA-based prodrugs can also present other benefits, such as improved oral bioavailability, promoted tumor targeting efficiency, controlled drug release, and enhanced cellular penetration, leading to improved therapeutic efficacy. In this review, we discuss diverse drug molecules conjugated to various unsaturated FAs. Furthermore, various drug-FA conjugates loaded into various nanostructure delivery systems, including liposomes, solid lipid nanoparticles, emulsions, nano-assemblies, micelles, and polymeric nanoparticles, are reviewed. The present review aims to inspire readers to explore new avenues in prodrug design based on the various FAs with or without nanostructured delivery systems.
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Affiliation(s)
- Nadia Fattahi
- Department of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran; Trita Nanomedicine Research Center (TNRC), Trita Third Millennium Pharmaceuticals, 45331-55681 Zanjan, Iran
| | - Mohammad-Ali Shahbazi
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland; Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran; Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC), Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Aziz Maleki
- Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran; Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC), Zanjan University of Medical Sciences, Zanjan, Iran
| | - Mehrdad Hamidi
- Trita Nanomedicine Research Center (TNRC), Trita Third Millennium Pharmaceuticals, 45331-55681 Zanjan, Iran; Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran; Zanjan Pharmaceutical Nanotechnology Research Center (ZPNRC), Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Ali Ramazani
- Department of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran; Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland; Helsinki Institute of Life Science (HiLIFE), Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.
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7
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Tonta MM, Aydemir Sezer U, Olmez H, Gurek AG, Sezer S. Cost‐effective synthesis of polyricinoleate: Investigation of coating characteristics,
in vitro
degradation, and antibacterial activity. J Appl Polym Sci 2019. [DOI: 10.1002/app.48172] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Magdalena Maria Tonta
- Department of ChemistryGebze Technical University Kocaeli 41400 Turkey
- Institute of Chemical TechnologyTUBITAK Marmara Research Center Kocaeli 41470 Turkey
| | - Umran Aydemir Sezer
- Medicine, Medical Device and Dermocosmetic Research and Application Laboratory‐IDAL, Department of Pharmacology, YETEM, Innovative Technologies Research and ApplicationSuleyman Demirel University Isparta 32260 Turkey
| | - Hulya Olmez
- Materials InstituteTUBITAK Marmara Research Center Kocaeli 41470 Turkey
| | - Ayse Gul Gurek
- Department of ChemistryGebze Technical University Kocaeli 41400 Turkey
| | - Serdar Sezer
- Medicine, Medical Device and Dermocosmetic Research and Application Laboratory‐IDAL, Department of Pharmacology, YETEM, Innovative Technologies Research and ApplicationSuleyman Demirel University Isparta 32260 Turkey
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8
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Petruš J, Kučera F, Jančář J. Online monitoring of reactive compatiblization of poly(lactic acid)/polyamide 6 blend with different compatibilizers. J Appl Polym Sci 2019. [DOI: 10.1002/app.48005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Josef Petruš
- Central European Institute of TechnologyBrno University of Technology, Purkyňova 656/123 612 00 Brno Czech Republic
- Faculty of Chemistry, Institute of Materials ChemistryBrno University of Technology, Purkyňova 464/118 612 00 Brno Czech Republic
| | - František Kučera
- Central European Institute of TechnologyBrno University of Technology, Purkyňova 656/123 612 00 Brno Czech Republic
- Faculty of Chemistry, Institute of Materials ChemistryBrno University of Technology, Purkyňova 464/118 612 00 Brno Czech Republic
| | - Josef Jančář
- Central European Institute of TechnologyBrno University of Technology, Purkyňova 656/123 612 00 Brno Czech Republic
- Faculty of Chemistry, Institute of Materials ChemistryBrno University of Technology, Purkyňova 464/118 612 00 Brno Czech Republic
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9
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Kong D, Zhang D, Guo H, Zhao J, Wang Z, Hu H, Xu J, Fu C. Functionalized Boron Nitride Nanosheets/Poly(l-lactide) Nanocomposites and Their Crystallization Behavior. Polymers (Basel) 2019; 11:polym11030440. [PMID: 30960424 PMCID: PMC6473543 DOI: 10.3390/polym11030440] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 12/04/2018] [Accepted: 12/04/2018] [Indexed: 12/02/2022] Open
Abstract
In this work, hydroxyl-functionalized boron nitride nanosheet (OH-BNNS) was prepared and was blended with poly(l-lactide) (PLLA) to yield PLLA/OH-BNNS nanocomposites with excellent dispersion of OH-BNNS via the interaction of carbonyl in PLLA and hydroxyl in OH-BNNS. The effects of OH-BNNS on the crystallization and melting behaviors, isothermal crystallization kinetics, macroscopic crystal morphology and crystal structure of PLLA were studied by means of various techniques. The addition of OH-BNNS nanofillers can effectively accelerate the crystallization of PLLA and enhance the nucleation density, leading to a smaller spherulite size, increased crystallinity, a more obvious crystallization peak upon cooling but weakened cold crystallization behavior upon heating. Low OH-BNNS loading can increase the relative content of α-crystal, but the relative content of less perfect α′-crystal is increased at high OH-BNNS loading due to the strong interaction between PLLA and OH-BNNS.
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Affiliation(s)
- Deyu Kong
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Deli Zhang
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Hongge Guo
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Jian Zhao
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
- State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
- Key Laboratory of Polymer Processing Engineering (South China University of Technology), Ministry of Education, Guangzhou 510640, China.
| | - Zhaobo Wang
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Haiqing Hu
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Junting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Cuiliu Fu
- Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao 266042, China; and School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
- State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
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10
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Yang L, Yang Z, Zhang F, Xie L, Luo Z, Zheng Q. Star Shaped Long Chain Branched Poly (lactic acid) Prepared by Melt Transesterification with Trimethylolpropane Triacrylate and Nano-ZnO. Polymers (Basel) 2018; 10:polym10070796. [PMID: 30960721 PMCID: PMC6403968 DOI: 10.3390/polym10070796] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/16/2018] [Accepted: 07/17/2018] [Indexed: 11/30/2022] Open
Abstract
Long chain branched poly (lactic acid) (LCBPLA) was prepared via transesterification between high molecular weight poly (lactic acid) (PLA) and low molar mass monomer trimethylolpropane triacrylate (TMPTA) during melt blending in the presence of zinc oxide nanoparticles (nano-ZnO) as a transesterification accelerant in a torque rheometer. Compared with the traditional processing methods, this novel way is high-efficiency, environmentally friendly, and gel-free. The results revealed that chain restructuring reactions occurred and TMPTA was grafted onto the PLA backbone. The topological structures of LCBPLA were verified and investigated in detail. It was found that the concentration of the accelerants and the sampling occasion had very important roles in the occurrence of branching structures. When the nano-ZnO dosage was 0.4 phr and PLA was sampled at the time corresponding to the reaction peak in the torque curve, PLA exhibited a star-shaped topological structure with a high branching degree which could obviously affect the melt strength, extrusion foaming performances, and crystallization behaviors. Compared with pristine PLA, LCBPLA showed a higher melt strength, smaller cell diameter, and slower crystallization speed owing to the synergistic effects of nano-ZnO and the long chain branches introduced by the transesterification reaction in the system. However, severe degradation of the LCBPLAs would take place under a mixing time that was too long and lots of short linear chains generated due to the excessive transesterification reaction, with a sharp decline in melt strength.
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Affiliation(s)
- Le Yang
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
| | - Zaijun Yang
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
| | - Feng Zhang
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
| | - Lijin Xie
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
| | - Zhu Luo
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
| | - Qiang Zheng
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
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11
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Zhang X, Fevre M, Jones GO, Waymouth RM. Catalysis as an Enabling Science for Sustainable Polymers. Chem Rev 2017; 118:839-885. [DOI: 10.1021/acs.chemrev.7b00329] [Citation(s) in RCA: 472] [Impact Index Per Article: 67.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xiangyi Zhang
- Department
of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Mareva Fevre
- IBM Research−Almaden, 650 Harry Road, San Jose, California 95120, United States
| | - Gavin O. Jones
- IBM Research−Almaden, 650 Harry Road, San Jose, California 95120, United States
| | - Robert M. Waymouth
- Department
of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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12
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Merlettini A, Gigli M, Ramella M, Gualandi C, Soccio M, Boccafoschi F, Munari A, Lotti N, Focarete ML. Thermal Annealing to Modulate the Shape Memory Behavior of a Biobased and Biocompatible Triblock Copolymer Scaffold in the Human Body Temperature Range. Biomacromolecules 2017. [DOI: 10.1021/acs.biomac.7b00644] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrea Merlettini
- Department
of Chemistry “G. Ciamician” and INSTM UdR of Bologna, University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Matteo Gigli
- Department
of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Martina Ramella
- Department
of Health Sciences, University of Piemonte Orientale, via Solaroli
17, 28100 Novara, Italy
| | - Chiara Gualandi
- Department
of Chemistry “G. Ciamician” and INSTM UdR of Bologna, University of Bologna, via Selmi 2, 40126 Bologna, Italy
- Health Sciences
and Technologies and Interdepartmental Center for Industrial Research
(HST-ICIR), University of Bologna, via Tolara di Sopra 41/E 40064, Ozzano dell’Emilia,
Bologna, Italy
| | - Michelina Soccio
- Department
of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Francesca Boccafoschi
- Department
of Health Sciences, University of Piemonte Orientale, via Solaroli
17, 28100 Novara, Italy
| | - Andrea Munari
- Department
of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Nadia Lotti
- Department
of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, via Terracini 28, 40131 Bologna, Italy
| | - Maria Letizia Focarete
- Department
of Chemistry “G. Ciamician” and INSTM UdR of Bologna, University of Bologna, via Selmi 2, 40126 Bologna, Italy
- Health Sciences
and Technologies and Interdepartmental Center for Industrial Research
(HST-ICIR), University of Bologna, via Tolara di Sopra 41/E 40064, Ozzano dell’Emilia,
Bologna, Italy
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13
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Sun J, Aly KI, Kuckling D. Synthesis of hyperbranched polymers from vegetable oil based monomers via ozonolysis pathway. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28600] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jingjiang Sun
- Chemistry Department; University of Paderborn; Warburger Str. 100 Paderborn D-33098 Germany
| | - Kamal I. Aly
- Chemistry Department; Faculty of Science, Assiut University; Polymer Lab. 122 Assiut 71516 Egypt
| | - Dirk Kuckling
- Chemistry Department; University of Paderborn; Warburger Str. 100 Paderborn D-33098 Germany
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14
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Recent developments and future prospects on bio-based polyesters derived from renewable resources: A review. Int J Biol Macromol 2016; 82:1028-40. [DOI: 10.1016/j.ijbiomac.2015.10.040] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 10/07/2015] [Accepted: 10/13/2015] [Indexed: 02/08/2023]
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15
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Kunduru KR, Basu A, Haim Zada M, Domb AJ. Castor Oil-Based Biodegradable Polyesters. Biomacromolecules 2015; 16:2572-87. [DOI: 10.1021/acs.biomac.5b00923] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Konda Reddy Kunduru
- Department of Medicinal Chemistry
and Natural Products, Institute for Drug Research, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Arijit Basu
- Department of Medicinal Chemistry
and Natural Products, Institute for Drug Research, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Moran Haim Zada
- Department of Medicinal Chemistry
and Natural Products, Institute for Drug Research, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Abraham J. Domb
- Department of Medicinal Chemistry
and Natural Products, Institute for Drug Research, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
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16
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Synthesis and characterization of biodegradable polyurethane for hypopharyngeal tissue engineering. BIOMED RESEARCH INTERNATIONAL 2015; 2015:871202. [PMID: 25839041 PMCID: PMC4369943 DOI: 10.1155/2015/871202] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 01/18/2015] [Accepted: 02/13/2015] [Indexed: 11/17/2022]
Abstract
Biodegradable crosslinked polyurethane (cPU) was synthesized using polyethylene glycol (PEG), L-lactide (L-LA), and hexamethylene diisocyanate (HDI), with iron acetylacetonate (Fe(acac)3) as the catalyst and PEG as the extender. Chemical components of the obtained polymers were characterized by FTIR spectroscopy, (1)H NMR spectra, and Gel Permeation Chromatography (GPC). The thermodynamic properties, mechanical behaviors, surface hydrophilicity, degradability, and cytotoxicity were tested via differential scanning calorimetry (DSC), tensile tests, contact angle measurements, and cell culture. The results show that the synthesized cPU possessed good flexibility with quite low glass transition temperature (T g , -22°C) and good wettability. Water uptake measured as high as 229.7 ± 18.7%. These properties make cPU a good candidate material for engineering soft tissues such as the hypopharynx. In vitro and in vivo tests showed that cPU has the ability to support the growth of human hypopharyngeal fibroblasts and angiogenesis was observed around cPU after it was implanted subcutaneously in SD rats.
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17
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Synthesis of Bio-Based Poly(lactic acid-co-10-hydroxy decanoate) Copolymers with High Thermal Stability and Ductility. Polymers (Basel) 2015. [DOI: 10.3390/polym7030468] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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18
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Hu X, Kang H, Li Y, Li M, Wang R, Xu R, Qiao H, Zhang L. Direct copolycondensation of biobased elastomers based on lactic acid with tunable and versatile properties. Polym Chem 2015. [DOI: 10.1039/c5py01332a] [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]
Abstract
Tunable and versatile biobased copolyesters with excellent performances in nanocomposites, polylactide tougheners and shape memory were synthesized and characterized.
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Affiliation(s)
- Xiaoran Hu
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials
| | - Hailan Kang
- College of Materials Science and Engineering
- Shenyang University of Chemical Technology
- Shenyang
- China
| | - Yan Li
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials
| | - Manqiang Li
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials
| | - Runguo Wang
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials
| | - Riwei Xu
- Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - He Qiao
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Liqun Zhang
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
- Beijing Laboratory of Biomedical Materials
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Abstract
Recent compatibilization strategies in poly(lactic acid)-based blends have been reviewed in this paper.
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Affiliation(s)
- Jian-Bing Zeng
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
| | - Kun-Ang Li
- College of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- China
| | - An-Ke Du
- Chongqing Academy of Science and Technology
- Chongqing 401123
- China
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Miao S, Wang P, Su Z, Zhang S. Vegetable-oil-based polymers as future polymeric biomaterials. Acta Biomater 2014; 10:1692-704. [PMID: 24012607 DOI: 10.1016/j.actbio.2013.08.040] [Citation(s) in RCA: 293] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 08/12/2013] [Accepted: 08/28/2013] [Indexed: 10/26/2022]
Abstract
Vegetable oils are one of the most important classes of bio-resources for producing polymeric materials. The main components of vegetable oils are triglycerides - esters of glycerol with three fatty acids. Several highly reactive sites including double bonds, allylic positions and the ester groups are present in triglycerides from which a great variety of polymers with different structures and functionalities can be prepared. Vegetable-oil-based polyurethane, polyester, polyether and polyolefin are the four most important classes of polymers, many of which have excellent biocompatibilities and unique properties including shape memory. In view of these characteristics, vegetable-oil-based polymers play an important role in biomaterials and have attracted increasing attention from the polymer community. Here we comprehensively review recent developments in the preparation of vegetable-oil-based polyurethane, polyester, polyether and polyolefin, all of which have potential applications as biomaterials.
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22
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Miller KR, Soucek MD. Degradation kinetics of photopolymerizable poly(lactic acid) films. J Appl Polym Sci 2014. [DOI: 10.1002/app.40475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kent R. Miller
- Department of Polymer Engineering; University of Akron; Akron Ohio 44325
| | - Mark D. Soucek
- Department of Polymer Engineering; University of Akron; Akron Ohio 44325
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23
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Vilela C, Sousa AF, Fonseca AC, Serra AC, Coelho JFJ, Freire CSR, Silvestre AJD. The quest for sustainable polyesters – insights into the future. Polym Chem 2014. [DOI: 10.1039/c3py01213a] [Citation(s) in RCA: 367] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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24
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Abstract
Abatract: The poly (L-lactide)/laponite composite films are prepared by the method of solution blending with polylactide (PLA) and laponite. The results show that when laponite content was lower than 0.2 %( mass w/w), laponite can be uniform dispersed in PLA and the composed material had good stability. Fourier transform infrared spectroscopy (FTIR) study demonstrates that PLA was successfully incorporated with laponite by Si-O bond. The mechanical measurement reveals that the tensile strength of PLA/laponite composite film has been increased with compared to pure PLA. The water contact angle (WCA) tests indicate that the hydrophobicity of the laponite modified PLA films can be improved. The present study reveals that the laponite as a complexing agent can improve the mechanical properties and hydrophilicity of PLA.
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25
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Lebarbé T, Ibarboure E, Gadenne B, Alfos C, Cramail H. Fully bio-based poly(l-lactide)-b-poly(ricinoleic acid)-b-poly(l-lactide) triblock copolyesters: investigation of solid-state morphology and thermo-mechanical properties. Polym Chem 2013. [DOI: 10.1039/c3py00300k] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Maisonneuve L, Lebarbé T, Grau E, Cramail H. Structure–properties relationship of fatty acid-based thermoplastics as synthetic polymer mimics. Polym Chem 2013. [DOI: 10.1039/c3py00791j] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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27
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Gautrot JE, Zhu XX. Biodegradable polymers based on bile acids and potential biomedical applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012. [DOI: 10.1163/156856206778530713] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Robertson ML, Paxton JM, Hillmyer MA. Tough blends of polylactide and castor oil. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3402-3410. [PMID: 21823623 DOI: 10.1021/am2006367] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Poly(l-lactide) (PLLA) is a renewable resource polymer derived from plant sugars with several commercial applications. Broader implementation of the material is limited due to its inherent brittleness. We show that the addition of 5 wt % castor oil to PLLA significantly enhances the overall tensile toughness with minimal reductions in the modulus and no plasticization of the PLLA matrix. In addition, we used poly(ricinoleic acid)-PLLA diblock copolymers, synthesized entirely from renewable resources, as compatibilizers for the PLLA/castor oil blends. Ricinoleic acid, the majority fatty acid comprising castor oil, was polymerized through a lipase-catalyzed condensation reaction. The resulting polymers contained a hydroxyl end-group that was subsequently used to initiate the ring-opening polymerization of l-lactide. The binary PLLA/castor oil blend exhibited a tensile toughness seven times greater than neat PLLA. The addition of block copolymer allowed for control over the morphology of the blends, and even further improvement in the tensile toughness was realized-an order of magnitude larger than that of neat PLLA.
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Affiliation(s)
- Megan L Robertson
- Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, United States
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30
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Coltelli MB, Toncelli C, Ciardelli F, Bronco S. Compatible blends of biorelated polyesters through catalytic transesterification in the melt. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.01.028] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Shen X, Wang Z. Catalytic resolution of racemic ethyl lactate to produce D-lactic acid by immobilized cells of Rhizopus sp. WS0128. ASIA-PAC J CHEM ENG 2011. [DOI: 10.1002/apj.434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Synthesis of branched poly(lactic acid) bearing a castor oil core and its plasticization effect on poly(lactic acid). Polym J 2011. [DOI: 10.1038/pj.2011.3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Bourbigot S, Fontaine G, Gallos A, Bellayer S. Reactive extrusion of PLA and of PLA/carbon nanotubes nanocomposite: processing, characterization and flame retardancy. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1715] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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34
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Oledzka E, Narine SS. Organic acids catalyzed polymerization of ε-caprolactone: Synthesis and characterization. J Appl Polym Sci 2010. [DOI: 10.1002/app.32897] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Thi TH, Matsusaki M, Akashi M. Development of Photoreactive Degradable Branched Polyesters with High Thermal and Mechanical Properties. Biomacromolecules 2009; 10:766-72. [DOI: 10.1021/bm801203g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tran Hang Thi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan, and Faculty of Technology of Organic Chemistry, College of Chemistry, Ministry of Industry and Trade, Tien Kien, Lam Thao, Phu Tho, Vietnam
| | - Michiya Matsusaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan, and Faculty of Technology of Organic Chemistry, College of Chemistry, Ministry of Industry and Trade, Tien Kien, Lam Thao, Phu Tho, Vietnam
| | - Mitsuru Akashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan, and Faculty of Technology of Organic Chemistry, College of Chemistry, Ministry of Industry and Trade, Tien Kien, Lam Thao, Phu Tho, Vietnam
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36
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Miao S, Zhang S, Su Z, Wang P. Chemoenzymatic synthesis of oleic acid-based polyesters for use as highly stable biomaterials. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22721] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Sokolsky-Papkov M, Domb AJ. Stereoisomeric effect onin vitro drug release from injectable poly(lactic acid co castor oil) polyesters. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1140] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Gautrot JE, Zhu XX. High molecular weight bile acid and ricinoleic acid-based copolyesters via entropy-driven ring-opening metathesis polymerisation. Chem Commun (Camb) 2008:1674-6. [DOI: 10.1039/b719021b] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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39
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Ebata H, Toshima K, Matsumura S. Lipase-Catalyzed Synthesis and Curing of High-Molecular-Weight Polyricinoleate. Macromol Biosci 2007; 7:798-803. [PMID: 17541925 DOI: 10.1002/mabi.200700018] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
High-molecular-weight polyricinoleate, with an M(w) of 100,600, was enzymatically prepared by the polycondensation of methylricinoleate using immobilized lipase from Pseudomonas cepacia (IM-PC) in bulk in the presence of 4 A molecular sieves at 80 degrees C for 7 d. Polyricinoleate was a viscous liquid at room temperature with a glass transition temperature (T(g)) of -74.8 degrees C, showed no crystallinity and was biodegraded by activated sludge. Polyricinoleate was readily cured using a dicumyl peroxide at 170 degrees C for 30 min to produce a chloroform insoluble crosslinked polyricinoleate with a hardness of 50A using durometer A.
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Affiliation(s)
- Hiroki Ebata
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
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40
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Haynes D, Abayasinghe NK, Harrison GM, Burg KJ, Smith DW. In Situ Copolyesters Containing Poly(l-lactide) and Poly(hydroxyalkanoate) Units. Biomacromolecules 2007; 8:1131-7. [PMID: 17371065 DOI: 10.1021/bm061018q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In situ copolyesters containing polylactide (PLA) and polyhydroxyalkanoate (PHA) segments were obtained via ring-opening polymerization of L-lactide using PHA as a macroinitiator with stannous octoate as catalyst. Incorporation of PHA (20 wt %) into PLA affords a novel copolymer with Mn values ranging from 25 to 50 KDa and low polydispersities of 1.8-2.3. DSC analysis of the copolymer indicates well-defined crystallization and melting transitions different from the homopolymers and corresponding blend. The polymers were characterized by FT-IR, GPC, DSC, optical microscopy, NMR, and TGA. The results show successful reactivity of PHA as a macroinitiator for the ring-opening polymerization of lactide.
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Affiliation(s)
- Dahlia Haynes
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, USA
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41
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Chitkara D, Shikanov A, Kumar N, Domb AJ. Biodegradable Injectable In Situ Depot-Forming Drug Delivery Systems. Macromol Biosci 2006; 6:977-90. [PMID: 17128422 DOI: 10.1002/mabi.200600129] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The scope of drug-delivery systems has expanded significantly in recent years providing new ways to deliver life saving therapeutics to patients. The development of new injectable drug-delivery systems has provided new vistas and opened up unexplored horizons in the field of science, particularly in controlled drug delivery since these systems possess unique advantages over traditional ones, which include ease of application, and localized and prolonged drug delivery. In the past few years, an increasing number of such systems has been reported in the literature for various biomedical applications, including drug delivery, cell encapsulation, and tissue repair. These are injectable fluids that can be introduced into the body in a minimally invasive manner prior to solidifying or gelling within the desired site. For this purpose both natural (chitosan, alginates) as well as synthetic polymers (PEGylated polyesters, ricinoleic acid-based polymers) have been utilized. These systems have been explored widely for the delivery of various therapeutic agents ranging for anti-neoplastic agents like paclitaxel to proteins and peptides such as insulin, almost covering every segment of the pharmaceutical field. This manuscript focuses on the recent advancements in the area of in situ forming biodegradable polymeric drug-delivery systems.
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Affiliation(s)
- Deepak Chitkara
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sec. 67, SAS Nagar, Mohali 160062, India
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43
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Slivniak R, Ezra A, Domb AJ. Hydrolytic Degradation and Drug Release of Ricinoleic Acid–Lactic Acid Copolyesters. Pharm Res 2006; 23:1306-12. [PMID: 16741657 DOI: 10.1007/s11095-006-0140-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2005] [Accepted: 01/27/2006] [Indexed: 10/24/2022]
Abstract
A systematic study on the degradation and drug release from L-lactic acid and ricinoleic-acid-based copolyesters is reported. These copolyesters were synthesized by ring opening polymerization (ROP), melt condensation (COND) and transesterification (TRANS) of high molecular weight poly(lactic acid) (PLA) with ricinoleic acid (PLA-RA), and repolymerization by condensation to yield random and block copolymers of weight average molecular weights (Mw) between 3000 and 13,000. All polymers showed an almost zero-order weight loss, with a 20-40% loss after 60 days of incubation. Lactic acid release to the degradation solution is proportional to weight loss of the polymer samples. The main decrease in molecular weight was observed during the first 20 days, followed by a slow degradation phase, which kept the number average molecular weight (Mn) at 4000-2000 for another 40 days. Water-soluble 5FU was released from ricinoleic-acid-based polymers faster than slightly water-soluble triamcinolone. Drug release into phosphate-buffered saline (pH 7.4, 0.1 M) at 37 degrees C from P(LA-RA) 60:40 prepared by condensation of the acids was faster than from pasty P(PLA-RA) 60:40 synthesized by transesterification for both drugs.
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Affiliation(s)
- Raia Slivniak
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, 91120, Jerusalem, Israel
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44
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Xu H, Teng C, Yu M. Improvements of thermal property and crystallization behavior of PLLA based multiblock copolymer by forming stereocomplex with PDLA oligomer. POLYMER 2006. [DOI: 10.1016/j.polymer.2006.03.090] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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45
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Polymers for tissue engineering, medical devices, and regenerative medicine. Concise general review of recent studies. POLYM ADVAN TECHNOL 2006. [DOI: 10.1002/pat.729] [Citation(s) in RCA: 291] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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