51
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Goodsel J, Madbouly S. Biodegradable polylactic acid (PLA). PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2020-0072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Polylactic acid (PLA) is a biodegradable material that can be processed using the common processing techniques, such as injection molding, extrusion, and blow molding. PLA has widely been researched and tested due to its biodegradable nature. As a biodegradable material, PLA can be subject to some inherently poor qualities, such as its brittleness, weak mechanical properties, small processing windows, or poor electrical and thermal properties. In order to nullify some of these issues, nanofiller composites have been added to the polymer matrix, such as nanocellulose, nanoclays, carbon nanotubes, and graphene. Dye-clay hybrid nanopigments (DCNP) have been used to explore potential applications in the food packaging industry with promising results. Several different compatibilizers have been studied as well, with the goal of increasing the mechanical properties of blends. A key application for PLA is in wound healing and surgical work, with a few studies described in the present chapter. Finally, the superwettability of dopamine modified PLA is examined, with promising results for separation of oily wastewater.
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Affiliation(s)
- James Goodsel
- Behrend College, School of Engineering , Pennsylvania State University , Erie , PA 16563 , USA
| | - Samy Madbouly
- Behrend College, School of Engineering , Pennsylvania State University , Erie , PA 16563 , USA
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52
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Nasution H, Olaiya NG, Haafiz MKM, Abdullah CK, Bakar SA, Olaiya FG, Mohamed A, H. P. S. AK. The role of amphiphilic chitosan in hybrid nanocellulose–reinforced polylactic acid biocomposite. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5355] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- H. Nasution
- Department of Chemical Engineering, Faculty of Engineering Universitas Sumatera Utara Medan 20155 Indonesia
| | - Niyi G. Olaiya
- School of Industrial Technology, Universiti Sains Malaysia Gelugor 11800 Malaysia
| | - M. K. Mohamad Haafiz
- School of Industrial Technology, Universiti Sains Malaysia Gelugor 11800 Malaysia
| | - C. K. Abdullah
- School of Industrial Technology, Universiti Sains Malaysia Gelugor 11800 Malaysia
| | - Suriani Abu Bakar
- Nanotechnology Research Centre, Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tanjong Malim 35900 Malaysia
| | - Funmilayo G. Olaiya
- Department of Chemical Engineering, Faculty of Engineering Universitas Sumatera Utara Medan 20155 Indonesia
| | - Azmi Mohamed
- Nanotechnology Research Centre, Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tanjong Malim 35900 Malaysia
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53
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Jun Shao, Tang J, Pu S, Hou H. Crystallization Behavior of Homochiral Polymer in Poly(L-lactic acid)/Poly(D-lactic acid) Asymmetric Blends: Effect of Melting States. POLYMER SCIENCE SERIES A 2021. [DOI: 10.1134/s0965545x2103010x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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54
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Banu JR, Buitrón G, Martin K, Kumar G. Recent advances in biopolymers production from biomass and waste (RABP-2020). BIORESOURCE TECHNOLOGY 2021; 328:124879. [PMID: 33648832 DOI: 10.1016/j.biortech.2021.124879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- J Rajesh Banu
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu, India
| | - Germán Buitrón
- Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Querétaro 76230, Mexico
| | - Koller Martin
- Office of Research Management and Service, c/o Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28/III, 8010 Graz, Austria
| | - Gopalakrishnan Kumar
- Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, 8600 Forus, 4036 Stavanger, Norway.
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55
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Kang H, Miao X, Li J, Li D, Fang Q. Synthesis and characterization of biobased thermoplastic polyester elastomers containing Poly(butylene 2,5-furandicarboxylate). RSC Adv 2021; 11:14932-14940. [PMID: 35424025 PMCID: PMC8697829 DOI: 10.1039/d1ra00066g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 04/15/2021] [Indexed: 01/02/2023] Open
Abstract
A series of sustainable and reprocessible thermoplastic polyester elastomers P(BF-PBSS)s were synthesized using dimethyl-2,5-furandicarboxylate, 1,4-butanediol, and synthetic low-molecular-weight biobased polyester (PBSS). The P(BF-PBSS)s contain poly(butylene 2,5-furandicarboxylate) (PBF) as their hard segment and PBSS as their soft segment. The microstructures of the P(BF-PBSS)s were confirmed by nuclear magnetic resonance, demonstrating that a higher content of the soft segment was incorporated into P(BF-PBSS)s with higher PBSS content. Interestingly, dynamic mechanical analysis indicated that P(BF-PBSS)s comprised two domains: crystalline PBF and a mixture of amorphous PBF and PBSS. Consequently, the microphase separations of P(BF-PBSS)s were mainly induced by the crystallization of their PBF segments. More importantly, the thermal, crystallization, and mechanical properties could be tailored by tuning the PBSS content. Our results indicate that the as-prepared P(BF-PBSS)s are renewable, thermally stable, and nontoxic, and have good tensile properties, indicating that they could be potentially applied in biomedical materials. A series of sustainable and reprocessible thermoplastic polyester elastomers P(BF-PBSS)s were synthesized using dimethyl-2,5-furandicarboxylate, 1,4-butanediol, and synthetic low-molecular-weight biobased polyester (PBSS).![]()
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Affiliation(s)
- Hailan Kang
- College of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China .,Key Laboratory for Rubber Elastomer of Liaoning Province, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Xiaoli Miao
- College of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China .,Key Laboratory for Rubber Elastomer of Liaoning Province, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Jiahuan Li
- College of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China .,Key Laboratory for Rubber Elastomer of Liaoning Province, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Donghan Li
- College of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China .,Key Laboratory for Rubber Elastomer of Liaoning Province, Shenyang University of Chemical Technology Shenyang 110142 China
| | - Qinghong Fang
- College of Materials Science and Engineering, Shenyang University of Chemical Technology Shenyang 110142 China .,Key Laboratory for Rubber Elastomer of Liaoning Province, Shenyang University of Chemical Technology Shenyang 110142 China
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56
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Bhattacharjee J, Peters M, Bockfeld D, Tamm M. Isoselective Polymerization of rac-Lactide by Aluminum Complexes of N-Heterocyclic Carbene-Phosphinidene Adducts. Chemistry 2021; 27:5913-5918. [PMID: 33555047 PMCID: PMC8048956 DOI: 10.1002/chem.202100482] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Indexed: 11/18/2022]
Abstract
The N-heterocyclic carbene-phosphinidene adducts (NHC)PH were reacted with AlMe3 in toluene to afford the monoaluminum complexes [{(IDipp)PH}AlMe3 ] and [{(IMes)PH}AlMe3 ] (IDipp=1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene, IMes=1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene). In contrast, the dialuminum complex [{(Me IMes)PH}(AlMe3 )2 ] was obtained for Me IMes=1,3-bis(2,4,6-trimethylphenyl)-4,5-dimethylimidazolin-2-ylidene. These complexes served as initiators for the efficient ring-opening polymerization of rac-lactide in toluene at 60 °C. High degrees of isoselectivity were found for the poly(rac-lactide) obtained in the presence of the monoaluminum complexes (Pm up to 0.92, Tm up to 191 °C), whereas almost atactic polymers were produced by the dialuminum complex. Detailed mechanistic studies reveal that the polymerization proceeds via a coordination-insertion mechanism with the carbene-phosphinidene ligands acting as stereodirecting groups.
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Affiliation(s)
- Jayeeta Bhattacharjee
- Institut für Anorganische und Analytische ChemieTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
| | - Marius Peters
- Institut für Anorganische und Analytische ChemieTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
| | - Dirk Bockfeld
- Institut für Anorganische und Analytische ChemieTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
| | - Matthias Tamm
- Institut für Anorganische und Analytische ChemieTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
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57
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Li Y, Li S, Sun J. Degradable Poly(vinyl alcohol)-Based Supramolecular Plastics with High Mechanical Strength in a Watery Environment. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007371. [PMID: 33634522 DOI: 10.1002/adma.202007371] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/17/2021] [Indexed: 06/12/2023]
Abstract
It is challenging to fabricate degradable poly(vinyl alcohol) (PVA)-based plastics that can be used in watery environments because PVA is soluble in water. In this study, PVA-based supramolecular plastics with excellent degradability in soil and high mechanical strength in watery environments are fabricated by the complexation of vanillin-grafted PVA (VPVA), hydrophobic humic acid (HA), and Fe3+ ions (hereafter denoted as VPVA-HA-Fe complexes). Large-area PVA-based plastics can be easily prepared from a solution of VPVA-HA-Fe complexes using a blade-coating method. The high-density of hydrogen bonds and coordination interactions, as well as the reinforcement of self-assembled Fe3+ -chelated HA nanoparticles, facilitate the fabrication of PVA-based plastics with a breaking strength of ≈85.0 MPa. After immersion in water at room temperature for 7 d, the PVA-based plastics exhibit a breaking strength of ≈26.2 MPa, which is similar to that of polyethylene in its dry state. Furthermore, owing to the reversibility of the hydrogen bonds and coordination interactions, the VPVA-HA-Fe plastics are recyclable and can be conveniently processed into plastic products with desired shapes. After being placed under soil for ≈108 d, the PVA-based plastics are completely degraded into nontoxic species without requiring manual interference.
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Affiliation(s)
- Yixuan Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Siheng Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Junqi Sun
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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58
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Effective and Stable Zeolite Imidazole Framework-Supported Copper Nanoparticles (Cu/ZIF-8) for Glycerol to Lactic Acid. Catal Letters 2021. [DOI: 10.1007/s10562-021-03610-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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59
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Verginio GEA, Montanheiro TLDA, Montagna LS, Marini J, Passador FR. Effectiveness of the preparation of maleic anhydride grafted poly (lactic acid) by reactive processing for poly (lactic acid)/carbon nanotubes nanocomposites. J Appl Polym Sci 2021. [DOI: 10.1002/app.50087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gleice Ellen Almeida Verginio
- Federal University of São Paulo (UNIFESP) Polymer and Biopolymer Technology Laboratory (TecPBio), 330 Talim St. São José dos Campos SP Brazil
| | - Thais Larissa do Amaral Montanheiro
- Laboratory of Plasmas and Processes Technological Institute of Aeronautics, Praça Marechal Eduardo Gomes, 50 ‐ Vila das Acacias São José dos Campos SP Brazil
| | - Larissa Stieven Montagna
- Federal University of São Paulo (UNIFESP) Polymer and Biopolymer Technology Laboratory (TecPBio), 330 Talim St. São José dos Campos SP Brazil
| | - Juliano Marini
- Federal University of São Carlos (UFSCar) Department of Materials Engineering, Rodovia Washington Luís, Km 235 São Carlos SP Brazil
| | - Fabio Roberto Passador
- Federal University of São Paulo (UNIFESP) Polymer and Biopolymer Technology Laboratory (TecPBio), 330 Talim St. São José dos Campos SP Brazil
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60
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PLA electrospun nanofibers modified with polypyrrole-grafted gelatin as bioactive electroconductive scaffold. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123487] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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61
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Kopylov AS, Kaplin VS, Glagolev NN, Solovieva AB. Polylactide Methacrylation in Supercritical Carbon Dioxide. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793120070088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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62
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Isolation of Textile Waste Cellulose Nanofibrillated Fibre Reinforced in Polylactic Acid-Chitin Biodegradable Composite for Green Packaging Application. Polymers (Basel) 2021; 13:polym13030325. [PMID: 33498323 PMCID: PMC7864045 DOI: 10.3390/polym13030325] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 01/07/2023] Open
Abstract
Textile waste cellulose nanofibrillated fibre has been reported with excellent strength reinforcement ability in other biopolymers. In this research cellulose nanofibrilated fibre (CNF) was isolated from the textile waste cotton fabrics with combined supercritical carbon dioxide and high-pressure homogenisation. The isolated CNF was used to enhance the polylactic acid/chitin (PLA/chitin) properties. The properties enhancement effect of the CNF was studied by characterising the PLA/chitin/CNF biocomposite for improved mechanical, thermal, and morphological properties. The tensile properties, impact strength, dynamic mechanical analysis, thermogravimetry analysis, scanning electron microscopy, and the PLA/chitin/CNF biocomposite wettability were studied. The result showed that the tensile strength, elongation, tensile modulus, and impact strength improved significantly with chitin and CNF compared with the neat PLA. Furthermore, the scanning electron microscopy SEM (Scanning Electron Microscopy) morphological images showed uniform distribution and dispersion of the three polymers in each other, which corroborate the improvement in mechanical properties. The biocomposite’s water absorption increased more than the neat PLA, and the contact angle was reduced. The results of the ternary blend compared with PLA/chitin binary blend showed significant enhancement with CNF. This showed that the three polymers’ combination resulted in a better material property than the binary blend.
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63
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Sajjad H, Prebihalo EA, Tolman WB, Reineke TM. Ring opening polymerization of β-acetoxy-δ-methylvalerolactone, a triacetic acid lactone derivative. Polym Chem 2021. [DOI: 10.1039/d1py00561h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We report here the synthesis and polymerization of a novel disubstituted valerolactone, β-acetoxy-δ-methylvalerolactone, derived from the renewable feedstock triacetic acid lactone (TAL).
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Affiliation(s)
- Hussnain Sajjad
- Department of Chemistry and Center for Sustainable Polymers, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, USA
| | - Emily A. Prebihalo
- Department of Chemistry and Center for Sustainable Polymers, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, USA
| | - William B. Tolman
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, Campus Box 1134, St Louis, MO 63130-4899, USA
| | - Theresa M. Reineke
- Department of Chemistry and Center for Sustainable Polymers, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455-0431, USA
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64
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Wen-Dong T, Guang-Jian H, Wei-Tao H, Xin-Liang Z, Xian-Wu C, Xiao-Chun Y. The reactive compatibilization of PLA/PP blends and improvement of PLA crystallization properties induced by in situ UV irradiation. CrystEngComm 2021. [DOI: 10.1039/d0ce01445a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The crystallization rate of PLA in PLA/PP blends increased after reactive compatibilization during a reactive extrusion process.
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Affiliation(s)
- Tang Wen-Dong
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
- South China University of Technology
- Guangzhou 510640
| | - He Guang-Jian
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
- South China University of Technology
- Guangzhou 510640
| | - Huang Wei-Tao
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
- South China University of Technology
- Guangzhou 510640
| | - Zou Xin-Liang
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
- South China University of Technology
- Guangzhou 510640
| | - Cao Xian-Wu
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
- South China University of Technology
- Guangzhou 510640
| | - Yin Xiao-Chun
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing
- South China University of Technology
- Guangzhou 510640
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65
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Development of an oxygen-releasing electroconductive in-situ crosslinkable hydrogel based on oxidized pectin and grafted gelatin for tissue engineering applications. Colloids Surf B Biointerfaces 2020; 196:111347. [DOI: 10.1016/j.colsurfb.2020.111347] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/19/2020] [Accepted: 08/22/2020] [Indexed: 12/16/2022]
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66
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Martins C, Chauhan VM, Araújo M, Abouselo A, Barrias CC, Aylott JW, Sarmento B. Advanced polymeric nanotechnology to augment therapeutic delivery and disease diagnosis. Nanomedicine (Lond) 2020; 15:2287-2309. [PMID: 32945230 DOI: 10.2217/nnm-2020-0145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Therapeutic and diagnostic payloads are usually associated with properties that compromise their efficacy, such as poor aqueous solubility, short half-life, low bioavailability, nonspecific accumulation and diverse side effects. Nanotechnological solutions have emerged to circumvent some of these drawbacks, augmenting therapeutic and/or diagnostic outcomes. Nanotechnology has benefited from the rise in polymer science research for the development of novel nanosystems for therapeutic and diagnostic purposes. Polymers are a widely used class of biomaterials, with a considerable number of regulatory approvals for application in clinics. In addition to their versatility in production and functionalization, several synthetic and natural polymers demonstrate biocompatible properties that dictate their successful biological performance. This article highlights the physicochemical characteristics of a variety of natural and synthetic biocompatible polymers, as well as their role in the manufacture of nanotechnology-based systems, state-of-art applications in disease treatment and diagnosis, and current challenges in finding a way to clinics.
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Affiliation(s)
- Cláudia Martins
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK.,ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Ruade Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Veeren M Chauhan
- School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Marco Araújo
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal
| | - Amjad Abouselo
- School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Cristina C Barrias
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal
| | - Jonathan W Aylott
- School of Pharmacy, Boots Science Building, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Bruno Sarmento
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, 4200-393, Porto, Portugal.,CESPU - Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra 1317, 4585-116, Gandra, Portugal
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67
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Boonluksiri Y, Prapagdee B, Sombatsompop N. Effect of poly(D‐lactic acid) and cooling temperature on heat resistance and antibacterial performance of stereocomplex poly(L‐lactic acid). J Appl Polym Sci 2020. [DOI: 10.1002/app.48970] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yeiangchart Boonluksiri
- Polymer PROcessing and Flow (P‐PROF) Research Group, Division of Materials Technology, School of Energy, Environment and MaterialsKing Mongkut's University of Technology Thonburi (KMUTT) Thungkru Bangkok 10140 Thailand
| | - Benjaphorn Prapagdee
- Laboratory of Environmental Biotechnology, Faculty of Environment and Resource StudiesMahidol University Salaya Nakhon Pathom 73170 Thailand
| | - Narongrit Sombatsompop
- Polymer PROcessing and Flow (P‐PROF) Research Group, Division of Materials Technology, School of Energy, Environment and MaterialsKing Mongkut's University of Technology Thonburi (KMUTT) Thungkru Bangkok 10140 Thailand
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68
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Chen Y, Liu S, Zhou Y, Zeng G, Liu W. Biodegradable PLA-based composites modified by POSS particles. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1719139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Yi Chen
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou, China
- Hunan Provincial Key Laboratory of Biomass Fiber Functional Materials, Hunan University of Technology, Zhuzhou, China
| | - Shuichang Liu
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou, China
- Hunan Provincial Key Laboratory of Biomass Fiber Functional Materials, Hunan University of Technology, Zhuzhou, China
| | - Yueyun Zhou
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou, China
- Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, College of Urban and Environmental Sciences, Hunan University of Technology, Zhuzhou, China
| | - Guangsheng Zeng
- Hunan Provincial Engineering Laboratory of Key Technique of Non-metallic Packaging Waste Resources Utilization, Hunan University of Technology, Zhuzhou, China
- Hunan Provincial Key Laboratory of Biomass Fiber Functional Materials, Hunan University of Technology, Zhuzhou, China
| | - Wenyong Liu
- Hunan Provincial Key Laboratory of Biomass Fiber Functional Materials, Hunan University of Technology, Zhuzhou, China
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69
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Ge X, Chang M, Jiang W, Zhang B, Xing R, Bulin C. Investigation on two modification strategies for the reinforcement of biodegradable lignin/poly(lactic acid) blends. J Appl Polym Sci 2020. [DOI: 10.1002/app.49354] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Xin Ge
- School of Materials and MetallurgyInner Mongolia University of Science and Technology Baotou China
| | - Mingming Chang
- School of Materials and MetallurgyInner Mongolia University of Science and Technology Baotou China
| | - Wei Jiang
- School of Materials and MetallurgyInner Mongolia University of Science and Technology Baotou China
| | - Bangwen Zhang
- Instrumental Analysis CenterInner Mongolia University of Science and Technology Baotou China
| | - Ruiguang Xing
- School of Materials and MetallurgyInner Mongolia University of Science and Technology Baotou China
| | - Chaoke Bulin
- School of Materials and MetallurgyInner Mongolia University of Science and Technology Baotou China
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Beitel SM, Coelho LF, Contiero J. Efficient Conversion of Agroindustrial Waste into D(-) Lactic Acid by Lactobacillus delbrueckii Using Fed-Batch Fermentation. BIOMED RESEARCH INTERNATIONAL 2020; 2020:4194052. [PMID: 32382549 PMCID: PMC7193294 DOI: 10.1155/2020/4194052] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/27/2020] [Accepted: 03/04/2020] [Indexed: 11/18/2022]
Abstract
PURPOSE The goal of this paper is to describe the green conversion of agricultural waste products, such as molasses and corn steep liquor, into large amounts of D(-) lactic acid using a facilitated multipulse fed-batch strategy and affordable pH neutralizer. This is a very low-cost process because there is no need for hydrolysis of the waste products. The fed-batch strategy increases lactic acid productivity by avoiding inhibition caused by a high initial substrate concentration, and the selected controlling agent prevents cell stress that could be caused by high osmotic pressure of the culture media. METHODS The effects of different carbon and nitrogen sources on lactic acid production were investigated, and the best concentrations of the medium components were determined. To optimize the culture conditions of the Lactobacillus delbrueckii strain, the effects of pH control, temperature, neutralizing agent, agitation, and inoculum size in batch cultures were investigated. Fed-batch strategies were also studied to improve production and productivity. RESULT A high titer of D(-) lactic acid (162g/liter) was achieved after 48 hours of fermentation. Productivity at this point was 3.37 g/L·h. The optimum conditions were a temperature of 39°C, pH 5.5 controlled by the addition of Ca(OH)2, agitation at 150 rpm, and inoculum size of 25% (v/v). CONCLUSION The production of high optical purity D(-) lactic acid through L. delbrueckii fermentation with molasses and corn steep liquor is a promising economical alternative process that can be performed on the industrial scale.
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Affiliation(s)
- Susan Michelz Beitel
- Department of Biochemistry and Microbiology, Institute Bioscience, São Paulo State University (UNESP), Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
| | - Luciana Fontes Coelho
- Department of Biochemistry and Microbiology, Institute Bioscience, São Paulo State University (UNESP), Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
| | - Jonas Contiero
- Department of Biochemistry and Microbiology, Institute Bioscience, São Paulo State University (UNESP), Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
- Associate Laboratory IPBEN-UNESP, Av. 24A 1515 CEP- 13506-900, Rio Claro São Paulo, Brazil
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71
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Golubeva E, Chumakova N, Kuzin S, Grigoriev I, Kalai T, Korotkevich A, Bogorodsky S, Krotova L, Popov V, Lunin V. Paramagnetic bioactives encapsulated in poly(D,L-lactide) microparticules: Spatial distribution and in vitro release kinetics. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2019.104748] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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72
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Metabolic engineering for the synthesis of polyesters: A 100-year journey from polyhydroxyalkanoates to non-natural microbial polyesters. Metab Eng 2020; 58:47-81. [DOI: 10.1016/j.ymben.2019.05.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/04/2019] [Accepted: 05/26/2019] [Indexed: 11/16/2022]
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73
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Stadler BM, Brandt A, Kux A, Beck H, de Vries JG. Properties of Novel Polyesters Made from Renewable 1,4-Pentanediol. CHEMSUSCHEM 2020; 13:556-563. [PMID: 31794106 PMCID: PMC7027755 DOI: 10.1002/cssc.201902988] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/02/2019] [Indexed: 05/04/2023]
Abstract
Novel polyester polyols were prepared in high yields from biobased 1,4-pentanediol catalyzed by non-toxic phosphoric acid without using a solvent. These oligomers are terminated with hydroxyl groups and have low residual acid content, making them suitable for use in adhesives by polyurethane formation. The thermal behavior of the polyols was studied by differential scanning calorimetry, and tensile testing was performed on the derived polyurethanes. The results were compared with those of polyurethanes obtained with fossil-based 1,4-butanediol polyester polyols. Surprisingly, it was found that a crystalline polyester was obtained when aliphatic long-chain diacids (>C12 ) were used as the diacid building block. The low melting point of the C12 diacid-based material allows the development of biobased shape-memory polymers with very low switching temperatures (<0 °C), an effect that has not yet been reported for a material based on a simple binary polyester. This might find application as thermosensitive adhesives in the packaging of temperature-sensitive goods such as pharmaceuticals. Furthermore, these results indicate that, although 1,4-pentanediol cannot be regarded as a direct substitute for 1,4-butanediol, its novel structure expands the toolbox of the adhesives, coatings, or sealants formulators.
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Affiliation(s)
- Bernhard M. Stadler
- Leibniz Institut für Katalyse e. V. an derUniversität RostockAlbert-Einstein-Strasse 29a18055RostockGermany
| | - Adrian Brandt
- Henkel AG & Co. KGaAHenkel-Str. 6740589DüsseldorfGermany
| | - Alexander Kux
- Henkel AG & Co. KGaAHenkel-Str. 6740589DüsseldorfGermany
| | - Horst Beck
- Henkel AG & Co. KGaAHenkel-Str. 6740589DüsseldorfGermany
| | - Johannes G. de Vries
- Leibniz Institut für Katalyse e. V. an derUniversität RostockAlbert-Einstein-Strasse 29a18055RostockGermany
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74
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The Crystallization and Melting Behaviors of PDLA-b-PBS-b-PDLA Triblock Copolymers. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-020-2361-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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75
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Li YF, Xie YM, Chen J, Li BN, Xie ZF, Wang SS, Zhang ZW. Initial experiences with a novel biodegradable device for percutaneous closure of atrial septal defects: From preclinical study to first-in-human experience. Catheter Cardiovasc Interv 2019; 95:282-293. [PMID: 31714687 PMCID: PMC7027946 DOI: 10.1002/ccd.28529] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 09/09/2019] [Accepted: 09/18/2019] [Indexed: 11/15/2022]
Abstract
Objective To evaluate the feasibility, safety, and effectiveness of a novel, absorbable atrial septal defect (ASD) closure device made of poly‐l‐lactic acid (PLLA) in a swine model of ASD and for the first time in humans. Methods A preclinical safety study was conducted using a swine model of ASD. In a clinical setting, five pediatric patients underwent ASD closure with the PLLA device with fluoroscopic and transthoracic echocardiography guidance. The procedural results and clinical outcomes at 1 day, 30 days, 3 months, and 6 months after closure were analyzed. Results The 24‐ and 36‐month follow‐up results of the preclinical study demonstrated that the PLLA device exhibited good endothelialization and degradability in the swine model. In the clinical study, successful device implantation was achieved in all five patients (median age, 3.6 years; range, 3.1–6.5 years). The mean defect size was (13.6 ± 2.7) mm. Follow‐up at 30 days, 3 months, and 6 months was completed in all five cases. The complete defect closure rates with no residual shunt at 30 days, 3 months, and 6 months follow‐up were 60% (3/5), 80% (4/5), and 80% (4/5), respectively. No device dislodgement, significant aortic valve or mitral valve regurgitation, new onset cardiac arrhythmia, or other adverse events were reported. Conclusion The study results demonstrated that it is feasible to implant the PLLA device for closure of small to medium sized ASDs without significant residual shunts or severe adverse events in humans. The PLLA device exhibited good endothelialization and degradability in the swine model at 24 and 36 months. Further studies to evaluate long‐term safety and effectiveness with the device in a large cohort of patients are warranted.
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Affiliation(s)
- Yi-Fan Li
- Department of Pediatric Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Yu-Mei Xie
- Department of Pediatric Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Jun Chen
- Department of Pediatric Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China.,The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Bo-Ning Li
- Department of Pediatric Cardiology, Shenzhen Children's Hospital, Shenzhen, China
| | - Zhao-Feng Xie
- Department of Pediatric Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Shu-Shui Wang
- Department of Pediatric Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
| | - Zhi-Wei Zhang
- Department of Pediatric Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangzhou, China
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76
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Park SY, Kim JY, Youn HJ, Choi JW. Utilization of lignin fractions in UV resistant lignin-PLA biocomposites via lignin-lactide grafting. Int J Biol Macromol 2019; 138:1029-1034. [DOI: 10.1016/j.ijbiomac.2019.07.157] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/18/2019] [Accepted: 07/24/2019] [Indexed: 11/25/2022]
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77
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Tanase-Opedal M, Espinosa E, Rodríguez A, Chinga-Carrasco G. Lignin: A Biopolymer from Forestry Biomass for Biocomposites and 3D Printing. MATERIALS 2019; 12:ma12183006. [PMID: 31527542 PMCID: PMC6766274 DOI: 10.3390/ma12183006] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/05/2019] [Accepted: 09/12/2019] [Indexed: 11/16/2022]
Abstract
Biopolymers from forestry biomass are promising for the sustainable development of new biobased materials. As such, lignin and fiber-based biocomposites are plausible renewable alternatives to petrochemical-based products. In this study, we have obtained lignin from Spruce biomass through a soda pulping process. The lignin was used for manufacturing biocomposite filaments containing 20% and 40% lignin and using polylactic acid (PLA) as matrix material. Dogbones for mechanical testing were 3D printed by fused deposition modelling. The lignin and the corresponding biocomposites were characterized in detail, including thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction analysis (XRD), antioxidant capacity, mechanical properties, and scanning electron microscopy (SEM). Although lignin led to a reduction of the tensile strength and modulus, the reduction could be counteracted to some extent by adjusting the 3D printing temperature. The results showed that lignin acted as a nucleating agent and thus led to further crystallization of PLA. The radical scavenging activity of the biocomposites increased to roughly 50% antioxidant potential/cm2, for the biocomposite containing 40 wt % lignin. The results demonstrate the potential of lignin as a component in biocomposite materials, which we show are adequate for 3D printing operations.
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Affiliation(s)
| | - Eduardo Espinosa
- Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, Building Marie-Curie, 14014 Campus de Rabanales, Spain.
| | - Alejandro Rodríguez
- Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, Building Marie-Curie, 14014 Campus de Rabanales, Spain.
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78
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Production of nonnatural straight-chain amino acid 6-aminocaproate via an artificial iterative carbon-chain-extension cycle. Metab Eng 2019; 55:23-32. [DOI: 10.1016/j.ymben.2019.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 06/13/2019] [Accepted: 06/15/2019] [Indexed: 12/23/2022]
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79
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Hador R, Botta A, Venditto V, Lipstman S, Goldberg I, Kol M. The Dual‐Stereocontrol Mechanism: Heteroselective Polymerization of
rac
‐Lactide and Syndioselective Polymerization of
meso
‐Lactide by Chiral Aluminum Salan Catalysts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906848] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Rami Hador
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Antonio Botta
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Sophia Lipstman
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Israel Goldberg
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Moshe Kol
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
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80
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Hador R, Botta A, Venditto V, Lipstman S, Goldberg I, Kol M. The Dual‐Stereocontrol Mechanism: Heteroselective Polymerization of
rac
‐Lactide and Syndioselective Polymerization of
meso
‐Lactide by Chiral Aluminum Salan Catalysts. Angew Chem Int Ed Engl 2019; 58:14679-14685. [DOI: 10.1002/anie.201906848] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Rami Hador
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Antonio Botta
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Sophia Lipstman
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Israel Goldberg
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Moshe Kol
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
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81
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Sun Y, Ding Q, Tang L, Zhang L, Sun Y, Xie Q. Accuracy of a chairside fused deposition modeling 3D-printed single-tooth surgical template for implant placement: An in vitro comparison with a light cured template. J Craniomaxillofac Surg 2019; 47:1216-1221. [DOI: 10.1016/j.jcms.2019.03.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 02/13/2019] [Accepted: 03/18/2019] [Indexed: 10/27/2022] Open
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82
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High-Level Conversion of l-lysine into Cadaverine by Escherichia coli Whole Cell Biocatalyst Expressing Hafnia alvei l-lysine Decarboxylase. Polymers (Basel) 2019; 11:polym11071184. [PMID: 31337154 PMCID: PMC6680443 DOI: 10.3390/polym11071184] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/03/2019] [Accepted: 07/05/2019] [Indexed: 11/30/2022] Open
Abstract
Cadaverine is a C5 diamine monomer used for the production of bio-based polyamide 510. Cadaverine is produced by the decarboxylation of l-lysine using a lysine decarboxylase (LDC). In this study, we developed recombinant Escherichia coli strains for the expression of LDC from Hafnia alvei. The resulting recombinant XBHaLDC strain was used as a whole cell biocatalyst for the high-level bioconversion of l-lysine into cadaverine without the supplementation of isopropyl β-d-1-thiogalactopyranoside (IPTG) for the induction of protein expression and pyridoxal phosphate (PLP), a key cofactor for an LDC reaction. The comparison of results from enzyme characterization of E. coli and H. alvei LDC revealed that H. alvei LDC exhibited greater bioconversion ability than E. coli LDC due to higher levels of protein expression in all cellular fractions and a higher specific activity at 37 °C (1825 U/mg protein > 1003 U/mg protein). The recombinant XBHaLDC and XBEcLDC strains were constructed for the high-level production of cadaverine. Recombinant XBHaLDC produced a 1.3-fold higher titer of cadaverine (6.1 g/L) than the XBEcLDC strain (4.8 g/L) from 10 g/L of l-lysine. Furthermore, XBHaLDC, concentrated to an optical density (OD600) of 50, efficiently produced 136 g/L of cadaverine from 200 g/L of l-lysine (97% molar yield) via an IPTG- and PLP-free whole cell bioconversion reaction. Cadaverine synthesized via a whole cell biocatalyst reaction using XBHaLDC was purified to polymer grade, and purified cadaverine was successfully used for the synthesis of polyamide 510. In conclusion, an IPTG- and PLP-free whole cell bioconversion process of l-lysine into cadaverine, using recombinant XBHaLDC, was successfully utilized for the production of bio-based polyamide 510, which has physical and thermal properties similar to polyamide 510 synthesized from chemical-grade cadaverine.
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83
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Crystallization, thermal stability, barrier property, and aging resistance application of multi-functionalized graphene oxide/poly(lactide)/starch nanocomposites. Int J Biol Macromol 2019; 132:1208-1220. [DOI: 10.1016/j.ijbiomac.2019.03.183] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/07/2019] [Accepted: 03/25/2019] [Indexed: 01/17/2023]
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84
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Xia M, Shi K, Zhou M, Shen Y, Wang T. Effects of chain extender and uniaxial stretching on the properties of PLA/PPC/mica composites. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4691] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Menglu Xia
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
| | - Kunxiang Shi
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
| | - Mingzhu Zhou
- Suqian Advanced Materials Institute of NanjingTech University Suqian China
| | - Yucai Shen
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
- Suqian Advanced Materials Institute of NanjingTech University Suqian China
| | - Tingwei Wang
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
- Suqian Advanced Materials Institute of NanjingTech University Suqian China
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85
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Roberts AD, Finnigan W, Wolde-Michael E, Kelly P, Blaker JJ, Hay S, Breitling R, Takano E, Scrutton NS. Synthetic biology for fibres, adhesives and active camouflage materials in protection and aerospace. MRS COMMUNICATIONS 2019; 9:486-504. [PMID: 31281737 PMCID: PMC6609449 DOI: 10.1557/mrc.2019.35] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/12/2019] [Indexed: 05/03/2023]
Abstract
Synthetic biology has huge potential to produce the next generation of advanced materials by accessing previously unreachable (bio)chemical space. In this prospective review, we take a snapshot of current activity in this rapidly developing area, focussing on prominent examples for high-performance applications such as those required for protective materials and the aerospace sector. The continued growth of this emerging field will be facilitated by the convergence of expertise from a range of diverse disciplines, including molecular biology, polymer chemistry, materials science and process engineering. This review highlights the most significant recent advances and address the cross-disciplinary challenges currently being faced.
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Affiliation(s)
- Aled D. Roberts
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
- Bio-Active Materials Group, School of Materials, The University of
Manchester, Manchester, UK, M13 9PL
| | - William Finnigan
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
| | - Emmanuel Wolde-Michael
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
| | - Paul Kelly
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
| | - Jonny J. Blaker
- Bio-Active Materials Group, School of Materials, The University of
Manchester, Manchester, UK, M13 9PL
| | - Sam Hay
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
| | - Rainer Breitling
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
| | - Eriko Takano
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
| | - Nigel S. Scrutton
- Manchester Institute of Biotechnology, Manchester Synthetic Biology
Research Centre SYBIOCHEM, School of Chemistry, The University of Manchester,
Manchester, UK, M1 7DN
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86
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Ghaffar T, Irshad M, Anwar Z, Aqil T, Zulifqar Z, Tariq A, Kamran M, Ehsan N, Mehmood S. Recent trends in lactic acid biotechnology: A brief review on production to purification. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2019. [DOI: 10.1016/j.jrras.2014.03.002] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tayyba Ghaffar
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Muhammad Irshad
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Zahid Anwar
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Tahir Aqil
- Department of Botany, University of Gujrat, Pakistan
| | - Zubia Zulifqar
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Asma Tariq
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Muhammad Kamran
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Nudrat Ehsan
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
| | - Sajid Mehmood
- Department of Biochemistry, NSMC, University of Gujrat, Pakistan
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87
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Lee Y, Cho IJ, Choi SY, Lee SY. Systems Metabolic Engineering Strategies for Non-Natural Microbial Polyester Production. Biotechnol J 2019; 14:e1800426. [PMID: 30851138 DOI: 10.1002/biot.201800426] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 01/04/2019] [Indexed: 11/07/2022]
Abstract
Plastics, used everyday, are mostly synthetic polymers derived from fossil resources, and their accumulation is becoming a serious concern worldwide. Polyhydroxyalkanoates (PHAs) are naturally produced polyesters synthesized and intracellularly accumulated by many different microorganisms. PHAs are good alternatives to petroleum-based plastics because they possess a wide range of material properties depending on monomer types and molecular weights. In addition, PHAs are biodegradable and can be produced from renewable biomass. Thus, producing PHAs through the development of high-performance engineered microorganisms and efficient bioprocesses gained much interest. In addition, non-natural polyesters comprising 2-hydroxycarboxylic acids as monomers have been produced by fermentation of metabolically engineered bacteria. For example, poly(lactic acid) and poly(lactic acid-co-glycolic acid), which have been chemically synthesized using the corresponding monomers either fermentatively or chemically produced, can be produced by metabolically engineered bacteria by one-step fermentation. Recently, PHAs containing aromatic monomers could be produced by fermentation of metabolically engineered bacteria. Here, metabolic engineering strategies applied in developing microbial strains capable of producing non-natural polyesters in a stepwise manner are reviewed. It is hoped that the detailed strategies described will be helpful for designing metabolic engineering strategies for developing diverse microbial strains capable of producing various polymers that can replace petroleum-derived polymers.
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Affiliation(s)
- Youngjoon Lee
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Plus Program), Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.,Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - In J Cho
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Plus Program), Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.,Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - So Y Choi
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Plus Program), Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.,Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.,Applied Science Research Institute, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Sang Y Lee
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Plus Program), Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.,Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.,Applied Science Research Institute, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.,BioInformatics Research Center, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.,BioProcess Engineering Research Center, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea
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88
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Zhang Q, Shi B, Ding J, Yan L, Thawani JP, Fu C, Chen X. Polymer scaffolds facilitate spinal cord injury repair. Acta Biomater 2019; 88:57-77. [PMID: 30710714 DOI: 10.1016/j.actbio.2019.01.056] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/10/2019] [Accepted: 01/28/2019] [Indexed: 12/23/2022]
Abstract
During the past decades, improving patient neurological recovery following spinal cord injury (SCI) has remained a challenge. An effective treatment for SCI would not only reduce fractured elements and isolate developing local glial scars to promote axonal regeneration but also ameliorate secondary effects, including inflammation, apoptosis, and necrosis. Three-dimensional (3D) scaffolds provide a platform in which these mechanisms can be addressed in a controlled manner. Polymer scaffolds with favorable biocompatibility and appropriate mechanical properties have been engineered to minimize cicatrization, customize drug release, and ensure an unobstructed space to promote cell growth and differentiation. These properties make polymer scaffolds an important potential therapeutic platform. This review highlights the recent developments in polymer scaffolds for SCI engineering. STATEMENT OF SIGNIFICANCE: How to improve the efficacy of neurological recovery after spinal cord injury (SCI) is always a challenge. Tissue engineering provides a promising strategy for SCI repair, and scaffolds are one of the most important elements in addition to cells and inducing factors. The review highlights recent development and future prospects in polymer scaffolds for SCI therapy. The review will guide future studies by outlining the requirements and characteristics of polymer scaffold technologies employed against SCI. Additionally, the peculiar properties of polymer materials used in the therapeutic process of SCI also have guiding significance to other tissue engineering approaches.
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89
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González DM, Cisterna J, Brito I, Roisnel T, Hamon JR, Manzur C. Binuclear Schiff-base zinc(II) complexes: Synthesis, crystal structures and reactivity toward ring opening polymerization of rac-lactide. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.043] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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90
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Padilla‐Gainza V, Morales G, Rodríguez‐Tobías H, Lozano K. Forcespinning technique for the production of poly(
d
,
l
‐lactic acid) submicrometer fibers: Process–morphology–properties relationship. J Appl Polym Sci 2019. [DOI: 10.1002/app.47643] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Victoria Padilla‐Gainza
- Polymer Synthesis Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo N° 140 Saltillo, C.P. 25294 Coahuila Mexico
| | - Graciela Morales
- Polymer Synthesis Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo N° 140 Saltillo, C.P. 25294 Coahuila Mexico
| | - Heriberto Rodríguez‐Tobías
- Polymer Synthesis Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna Hermosillo N° 140 Saltillo, C.P. 25294 Coahuila Mexico
| | - Karen Lozano
- Mechanical Engineering Department University of Texas Rio Grande Valley, 1201 W. University Dr. Edinburg Texas 78539
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91
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Dopamine-induced functionalization of cellulose nanocrystals with polyethylene glycol towards poly(L-lactic acid) bionanocomposites for green packaging. Carbohydr Polym 2019; 203:275-284. [DOI: 10.1016/j.carbpol.2018.09.057] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/29/2018] [Accepted: 09/20/2018] [Indexed: 11/19/2022]
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92
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Jing Z, Li J, Xiao W, Xu H, Hong P, Li Y. Crystallization, rheology and mechanical properties of the blends of poly(l-lactide) with supramolecular polymers based on poly(d-lactide)–poly(ε-caprolactone-co-δ-valerolactone)–poly(d-lactide) triblock copolymers. RSC Adv 2019; 9:26067-26079. [PMID: 35531016 PMCID: PMC9070369 DOI: 10.1039/c9ra04283k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 08/04/2019] [Indexed: 01/01/2023] Open
Abstract
In this study, we investigated the blending of poly(l-lactide) (PLLA) with supramolecular polymers based on poly(d-lactide)–poly(ε-caprolactone-co-δ-valerolactone)–poly(d-lactide) (PDLA–PCVL–PDLA) triblock copolymers as an efficient way to modify PLLA. The supramolecular polymers (SMP) were synthesized by the terminal functionalization of the PDLA–PCVL–PDLA copolymers with 2-ureido-4[1H]-pyrimidinone (UPy). The structure, thermal properties and rheological behavior of the synthesized supramolecular polymers were studied; we found that the formation of the UPy dimers expanded the molecular chain of the polymer and the incorporation of the UPy groups suppressed the crystallization of polymers. In addition, the synthesized supramolecular polymers had a low glass transition temperature of about −50 °C, showing the characteristics of elastomers. On this basis, superior properties such as a fast crystallization rate, high melt strength, and toughness of fully bio-based, i.e., PLA-based materials were achieved simultaneously by blending PLLA with the synthesized supramolecular polymers. In the PLLA/SMP blends, PLLA could form a stereocomplex with its enantiomeric PDLA blocks of supramolecular polymers, and the stereocomplex crystals with the cross-linking networks reinforced the melt strength of the PLLA/SMP blends. The influences of the SMP composition and the SMP content in the PLLA matrix on crystallization and mechanical properties were analyzed. The supramolecular polymers SMP0.49 and SMP1.04 showed a reverse effect on the crystallization of PLLA. Tensile tests revealed that the lower content of the synthesized supramolecular polymers could achieve toughening of the PLLA matrix. Therefore, the introduction of supramolecular polymers based on PDLA–PCVL–PDLA is an effective way to control the crystallization, rheology and mechanical properties of PLLA. Supramolecular polymer based on PDLA–PCVL–PDLA triblock copolymer was used for the modification of PLLA, and the results showed that it is an effective way to control the crystallization, rheology and mechanical properties of PLLA.![]()
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Affiliation(s)
- Zhanxin Jing
- Department of Applied Chemistry
- College of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang
- China
| | - Jin Li
- Department of Applied Chemistry
- College of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang
- China
| | - Weiyu Xiao
- Department of Applied Chemistry
- College of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang
- China
| | - Hefeng Xu
- Department of Applied Chemistry
- College of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang
- China
| | - Pengzhi Hong
- Department of Applied Chemistry
- College of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang
- China
| | - Yong Li
- Department of Applied Chemistry
- College of Chemistry and Environment
- Guangdong Ocean University
- Zhanjiang
- China
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93
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Fabrication of polylactic acid/carbon nanotubes/chitosan composite fibers by electrospinning for strawberry preservation. Int J Biol Macromol 2019; 121:1329-1336. [DOI: 10.1016/j.ijbiomac.2018.09.042] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/30/2018] [Accepted: 09/07/2018] [Indexed: 12/19/2022]
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94
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Tsuji H, Kikkawa K, Ozawa R, Arakawa Y. Simultaneous stereocomplex cocrystallization from coexisting two types of stereocomplexationable poly(lactide) systems. CrystEngComm 2019. [DOI: 10.1039/c9ce00403c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simultaneous stereocomplex cocrystallization from two types of stereocomplexationable poly(lactide) systems, four-armed stereodiblock poly(lactide) and one-armed poly(l-lactide) and poly(d-lactide), was investigated.
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Affiliation(s)
- Hideto Tsuji
- Department of Applied Chemistry and Life Science (previous name: Department of Environmental and Life Sciences)
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Koudai Kikkawa
- Department of Applied Chemistry and Life Science (previous name: Department of Environmental and Life Sciences)
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Ryota Ozawa
- Department of Applied Chemistry and Life Science (previous name: Department of Environmental and Life Sciences)
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Yuki Arakawa
- Department of Applied Chemistry and Life Science (previous name: Department of Environmental and Life Sciences)
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
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95
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Influence of Chain Architectures on Crystallization Behaviors of PLLA Block in PEG/PLLA Block Copolymers. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-019-2202-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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96
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Mase N, Moniruzzaman, Mori S, Ishizuka J, Kumazawa F, Yamamoto S, Sato K, Narumi T. Organocatalytic ring-opening polymerization of l-lactide in supercritical carbon dioxide under plasticizing conditions. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.10.065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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97
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Ligand-free scandium alkyl and alkoxide complexes for immortal ring-opening polymerization of lactide. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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98
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Santos KM, Albuquerque EM, Borges LE, Fraga MA. Discussing Lewis and Brønsted acidity on continuous pyruvaldehyde Cannizzaro reaction to lactic acid over solid catalysts. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2017.12.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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99
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Wang X, Jia Y, Liu Z, Miao J. Influence of the Lignin Content on the Properties of Poly(Lactic Acid)/lignin-Containing Cellulose Nanofibrils Composite Films. Polymers (Basel) 2018; 10:polym10091013. [PMID: 30960938 PMCID: PMC6403545 DOI: 10.3390/polym10091013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 08/30/2018] [Accepted: 09/10/2018] [Indexed: 11/16/2022] Open
Abstract
Poly(lactic acid) (PLA)/lignin-containing cellulose nanofibrils (L-CNFs) composite films with different lignin contents were produced bythe solution casting method. The effect of the lignin content on the mechanical, thermal, and crystallinity properties, and PLA/LCNFs interfacial adhesion wereinvestigated by tensile tests, thermogravimetric analysis, differential scanning calorimetry (DSC), dynamic mechanical analysis, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The tensile strength and modulus of the PLA/9-LCNFs (9 wt % lignin LCNFs) composites are 37% and 61% higher than those of pure PLA, respectively. The glass transition temperature (Tg) decreases from 61.2 for pure PLA to 52.6 °C for the PLA/14-LCNFs (14 wt % lignin LCNFs) composite, and the composites have higher thermal stability below 380 °C than pure PLA. The DSC results indicate that the LCNFs, containing different lignin contents, act as a nucleating agent to increase the degree of crystallinity of PLA. The effect of the LCNFs lignin content on the PLA/LCNFs compatibility/adhesion was confirmed by the FTIR, SEM, and Tg results. Increasing the LCNFs lignin content increases the storage modulus of the PLA/LCNFs composites to a maximum for the PLA/9-LCNFs composite. This study shows that the lignin content has a considerable effect on the strength and flexibility of PLA/LCNFs composites.
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Affiliation(s)
- Xuan Wang
- College of Chemical Engineering, Xi'an University, Xi'an 710065, China.
| | - Yuan Jia
- College of Chemical Engineering, Xi'an University, Xi'an 710065, China.
| | - Zhen Liu
- College of Chemical Engineering, Xi'an University, Xi'an 710065, China.
| | - Jiaojiao Miao
- School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
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100
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Amarasekara AS, Garcia‐Obergon R, Thompson AK. Vanillin‐based polymers: IV. Hydrovanilloin epoxy resins. J Appl Polym Sci 2018. [DOI: 10.1002/app.47000] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Rocio Garcia‐Obergon
- Department of Chemistry Prairie View A&M University Prairie View Texas 77446 USA
| | - Audie K. Thompson
- Department of Chemical Engineering Prairie View A&M University Prairie View Texas 77446 USA
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