1
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Zhang Z, Cui S, Ma R, Ye Q, Sun J, Wang Y, Liu C, Wang Z. Melt stretching and quenching produce low-crystalline biodegradable poly(lactic acid) filled with β-form shish for highly improved mechanical toughness. Int J Biol Macromol 2023; 251:126220. [PMID: 37572805 DOI: 10.1016/j.ijbiomac.2023.126220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/27/2023] [Accepted: 08/05/2023] [Indexed: 08/14/2023]
Abstract
High-toughness biodegradable poly(lactic acid) (PLA) has always been intensively pursued on the way of replacing traditional petroleum-based plastics. Regulating microstructures to achieve self-toughening holds great promise due to avoidance of incorporating other heterogeneous components. Herein, we propose a straightforward and effective way to tailor microstructures and properties of PLA through melt-stretching and quenching of slightly crosslinked samples. The melt stretching drives chains orientation and crystallization at high temperature, while the quenching followed can freeze the crystallization process to any stage. For the first time, we prepare a type of transparent and low-crystalline PLA filled with rod-like β-form shish, which displays an outstanding tensile toughness, almost 17 times that of the conventional technique-processed one. This mechanical superiority is enabled by an integration of high ductility due to oriented chain network, and high tensile stress endowed by nanofibrous filler's role of β-form shish. Furthermore, the mechanically toughened PLA is demonstrated to generate the richest micro-cracks and shear bands under loading, which can effectively dissipate the deformational energy and underlie the high toughness. This work opens a new prospect for the bottom-up design of high-performance bio-based PLA materials that are tough, ductile and transparent by precise microstructural regulation through scalable melt processing route.
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Affiliation(s)
- Zhen Zhang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Shanlin Cui
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Ruixue Ma
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Qiuyang Ye
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Jiahui Sun
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Yaming Wang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China.
| | - Chuntai Liu
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China
| | - Zhen Wang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou 450002, China.
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2
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Liu J, Wang B, Liu W, Hu X, Zhang C, Zhou Z, Lang J, Wu G, Zhang Y, Yang J, Ni Z, Zhao G. Regulating mechanical performance of poly (l-lactide acid) stent by the combined effects of heat and aqueous media. Int J Biol Macromol 2023:124987. [PMID: 37236565 DOI: 10.1016/j.ijbiomac.2023.124987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/08/2023] [Accepted: 05/18/2023] [Indexed: 05/28/2023]
Abstract
Annealing process has been applied to the development of thermoforming polymer braided stent and treating its basic constitute monofilaments, especially for Poly (l-lactide acid) (PLLA) condensed by lactic acid monomer made from the plant starch. In this work, high performance monofilaments were produced by melting spun and solid-state drawing methods. Inspired by the effects of water plasticization on semi-crystal polymer, PLLA monofilaments were annealed with and without constraint in vacuum and aqueous media. Then, the co-effects of water infestation and heat on the micro-structure and mechanical properties of these filaments were characterized. Furtherly, mechanical performance of PLLA braided stents shaped by different annealing methods was also compared. Results showed that annealing in aqueous media generated more obvious structure change of PLLA filaments. Interestingly, the combined effects of aqueous phase and thermal effectively increased the crystallinity, and decreased the molecular weight and orientation of PLLA filaments. Therefore, higher modulus, smaller strength, and elongation at the break for filaments could be obtained, which could furtherly realize better radial compression resistance of the braided stent. This annealing strategy could provide new perspectives between anneal and material properties of PLLA monofilaments, and provide more suitable manufacturing technics for polymer braided stent.
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Affiliation(s)
- Jinbo Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Bin Wang
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Wentao Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Xue Hu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Chen Zhang
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Zhiyuan Zhou
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Ji Lang
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China
| | - Gensheng Wu
- School of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing, China
| | - Yi Zhang
- Center of Interventional Radiology & Vascular Surgery, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210044, China
| | - Juekuan Yang
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China.
| | - Zhonghua Ni
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China.
| | - Gutian Zhao
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing 211189, China.
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3
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Modeling of polymorphic composition development during isothermal crystallization of poly(l-lactide acid). POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Wang S, Liu B, Qin Y, Guo H. Effects of Processing Conditions and Plasticizing-Reinforcing Modification on the Crystallization and Physical Properties of PLA Films. MEMBRANES 2021; 11:membranes11080640. [PMID: 34436403 PMCID: PMC8400887 DOI: 10.3390/membranes11080640] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 11/30/2022]
Abstract
The polylactic acid (PLA) resin Ingeo 4032D was selected as the research object. Epoxy soybean oil (ESO) and zeolite (3A molecular sieve) were used as plasticizer and reinforcing filler, respectively, for PLA blend modification. The mixture was granulated in an extruder and then blown to obtain films under different conditions to determine the optimum processing temperatures and screw rotation. Then, the thermal behaviour, crystallinity, optical transparency, micro phase structure and physical properties of the film were investigated. The results showed that with increasing zeolite content, the crystallization behaviour of PLA changed, and the haze of the film increased from 5% to 40% compared to the pure PLA film. Zeolite and ESO dispersed in the PLA matrix played a role in toughening and strengthening. The PLA/8 wt% zeolite/3 wt% ESO film had the highest longitudinal tensile strength at 77 MPa. The PLA/2 wt% zeolite/3 wt% ESO film had the highest longitudinal elongation at 13%. The physical properties depended heavily on the dispersion of zeolite and ESO in the matrix.
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5
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Zhang Z, Wang X, Wang Y, Shen C, Liu C, Wang Z. Melt extension-induced shish-kebabs with heterogeneous spatial distribution of crystalline polymorphs in lightly crosslinked poly(lactic acid). POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122875] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Wang Z, Zhang C, Zhang Z, Chen X, Wang X, Wen M, Chen B, Cao W, Liu C. Polyethylene oxide enhances the ductility and toughness of polylactic acid: the role of mesophase. SOFT MATTER 2020; 16:7018-7032. [PMID: 32648874 DOI: 10.1039/d0sm00671h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A lack of understanding of the structure-property relationship of the polylactic acid (PLA)-based polymer composite system makes it a challenge to manufacture products with optimized mechanical performance by precisely regulating the microscopic structure and morphology. Herein, we chose the PLA/polyethylene oxide (PEO) blend as a model to investigate the structural reason for the enhanced ductility and toughness of this kind of material. We have demonstrated that a considerable amount of the PLA mesophases exist in the melt quenched films that display high ductility and toughness, in contrast to the PLA crystals in their counterparts of slowly cooled films that are dominated by brittle fracture. The mesophase formed by melt quenching is attributed to a moderate acceleration of PLA chain mobility due to the plasticizing effect of the flexible PEO. In situ experiments have revealed the further formation of oriented mesophases induced by tensile deformation, which presents a high consistency between the content increase and the tensile stress intensification. We illustrate that the mesophases directly develop into a microfibrillar morphology to transmit the external stress and prevent crack propagation under deformation. This work emphasizes the essential role of the PLA mesophase in acquiring the enhanced ductility and toughness of the PLA/PEO composite films, which may be generalized to other similar PLA-based polymer composite materials.
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Affiliation(s)
- Zhen Wang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou, 450002, China.
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7
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Güzdemir Ö, Bermudez V, Kanhere S, Ogale AA. Melt‐spun poly(lactic acid) fibers modified with soy fillers: Toward environment‐friendly disposable nonwovens. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Özgün Güzdemir
- Chemical Engineering and Center for Advanced Engineering Fibers and Films Clemson University Clemson South Carolina USA
| | - Victor Bermudez
- Chemical Engineering and Center for Advanced Engineering Fibers and Films Clemson University Clemson South Carolina USA
| | - Sagar Kanhere
- Chemical Engineering and Center for Advanced Engineering Fibers and Films Clemson University Clemson South Carolina USA
| | - Amod A. Ogale
- Chemical Engineering and Center for Advanced Engineering Fibers and Films Clemson University Clemson South Carolina USA
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8
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Huang S, Li H, Jiang S. Pressure induced crystallization and in situ simultaneous SAXS/WAXS investigations on structure transitions. CrystEngComm 2020. [DOI: 10.1039/d0ce00548g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A phase diagram of PLLA crystal structures as a function of crystallization temperature (Tc) and pressure (Pc).
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Affiliation(s)
- Shaoyong Huang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Hongfei Li
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Shichun Jiang
- School of Materials Science and Engineering
- Tianjin University
- Tianjin
- China
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9
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Haim Zada M, Kumar A, Elmalak O, Markovitz E, Icekson R, Domb AJ. In vitro and in vivo degradation behavior and the long-term performance of biodegradable PLCL balloon implants. Int J Pharm 2020; 574:118870. [DOI: 10.1016/j.ijpharm.2019.118870] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/10/2019] [Accepted: 11/11/2019] [Indexed: 02/06/2023]
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10
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Huang S, Li H, Jiang S. Crystal structure and unique lamellar thickening for poly(l-lactide) induced by high pressure. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Im SH, Kim CY, Jung Y, Jang Y, Kim SH. Biodegradable vascular stents with high tensile and compressive strength: a novel strategy for applying monofilaments via solid-state drawing and shaped-annealing processes. Biomater Sci 2018; 5:422-431. [PMID: 28184401 DOI: 10.1039/c7bm00011a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monofilaments such as those consisting of polyamide (PA), polydioxanone (PDS), and poly(vinylidene fluoride) (PVDF), have been commonly used in various industries. However, most are non-biodegradable, which is unfavorable for many biomedical applications. Although biodegradable polymers offer significant benefits, they are still limited by their weak mechanical properties, which is an obstacle for use as a biomaterial that requires high strength. To overcome the current limitations of biodegradable monofilaments, a novel solid-state drawing (SSD) process was designed to significantly improve the mechanical properties of both PA and poly(l-lactic acid) (PLLA) monofilaments in this study. Both PA and PLLA monofilaments exhibited more than two-fold increased tensile strength and a highly reduced thickness using SSD. In X-ray diffraction and scanning electron microscopy analyses, it was determined that SSD could not only promote the α-crystal phase, but also smoothen the surface of PLLA monofilaments. To apply SSD-monofilaments with superior properties to cardiovascular stents, a shaped-annealing (SA) process was designed as the follow-up process after SSD. Using this process, three types of vascular stents could be fabricated, composed of SSD-monofilaments: double-helix, single-spring and double-spring shaped stents. The annealing temperature was optimized at 80 °C to minimize the loss of mechanical and physical properties of SSD-monofilaments for secondary processing. All three types of vascular stents were tested according to ISO 25539-2. Consequently, it was confirmed that spring-shaped stents had good recovery rate values and a high compressive modulus. In conclusion, this study showed significantly improved mechanical properties of both tensile and compressive strength simultaneously and extended the potential for biomedical applications of monofilaments.
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Affiliation(s)
- Seung Hyuk Im
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. and Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Chang Yong Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. and Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Youngmee Jung
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea and Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
| | - Yangsoo Jang
- Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Soo Hyun Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. and Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea and Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
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12
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Sombatdee S, Amornsakchai T, Saikrasun S. Effects of polylactic acid and rPET minor components on phase evolution, tensile and thermal properties of polyethylene-based composite fibers. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4224] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Suthisa Sombatdee
- Creative Chemistry and Innovation Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science; Mahasarakham University; Mahasarakham 44150 Thailand
| | - Taweechai Amornsakchai
- Center of Sustainable Energy and Green Materials, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science; Mahidol University; 999 Phuttamonthon 4 Road, Salaya Nakhon Pathom 73170 Thailand
| | - Sunan Saikrasun
- Creative Chemistry and Innovation Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science; Mahasarakham University; Mahasarakham 44150 Thailand
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13
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Bao J, Chang X, Xie Q, Yu C, Shan G, Bao Y, Pan P. Preferential Formation of β-Form Crystals and Temperature-Dependent Polymorphic Structure in Supramolecular Poly(l-lactic acid) Bonded by Multiple Hydrogen Bonds. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01705] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Jianna Bao
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Xiaohua Chang
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Qing Xie
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Chengtao Yu
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Guorong Shan
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Yongzhong Bao
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering,
College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China
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14
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Krishnan P, Rajan M, Kumari S, Sakinah S, Priya SP, Amira F, Danjuma L, Pooi Ling M, Fakurazi S, Arulselvan P, Higuchi A, Arumugam R, Alarfaj AA, Munusamy MA, Hamat RA, Benelli G, Murugan K, Kumar SS. Efficiency of newly formulated camptothecin with β-cyclodextrin-EDTA-Fe 3O 4 nanoparticle-conjugated nanocarriers as an anti-colon cancer (HT29) drug. Sci Rep 2017; 7:10962. [PMID: 28887536 PMCID: PMC5591276 DOI: 10.1038/s41598-017-09140-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 07/24/2017] [Indexed: 11/25/2022] Open
Abstract
Camptothecin (CPT) is an anti-cancer drug that effectively treats various cancers, including colon cancer. However, poor solubility and other drawbacks have restricted its chemotherapeutic potential. To overcome these restrictions, CPT was encapsulated in CEF (cyclodextrin-EDTA-FE3O4), a composite nanoparticle of magnetic iron oxide (Fe3O4), and β-cyclodextrin was cross-linked with ethylenediaminetetraacetic acid (EDTA). This formulation improved CPT’s solubility and bioavailability for cancer cells. The use of magnetically responsive anti-cancer formulation is highly advantageous in cancer chemotherapy. The chemical characterisation of CPT-CEF was studied here. The ability of this nano-compound to induce apoptosis in HT29 colon cancer cells and A549 lung cancer cells was evaluated. The dose-dependent cytotoxicity of CPT-CEF was shown using MTT. Propidium iodide and Annexin V staining, mitochondrial membrane depolarisation (JC-1 dye), and caspase-3 activity were assayed to detect apoptosis in CPT-CEF-treated cancer cells. Cell cycle analysis also showed G1 phase arrest, which indicated possible synergistic effects of the nano-carrier. These study results show that CPT-CEF causes a dose-dependent cell viability reduction in HT29 and A549 cells and induces apoptosis in colon cancer cells via caspase-3 activation. These data strongly suggest that CPT could be used as a major nanocarrier for CPT to effectively treat colon cancer.
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Affiliation(s)
- Poorani Krishnan
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Mariappan Rajan
- Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625 021, Tamil Nadu, India.
| | - Sharmilah Kumari
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - S Sakinah
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Sivan Padma Priya
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Fatin Amira
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Lawal Danjuma
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Mok Pooi Ling
- Department of Biomedical Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.,Genetics and Regenerative Medicine Research Centre, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Sharida Fakurazi
- Laboratory of Vaccines and Immunotherapeutic, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Palanisamy Arulselvan
- Laboratory of Vaccines and Immunotherapeutic, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia.,Muthayammal Centre for Advanced Research, Muthayammal College of Arts and Science, Rasipuram, Namakkal, Tamilnadu, 637408, India
| | - Akon Higuchi
- Department of Chemical and Materials Engineering, National Central University, Jhong-li, Taoyuan, 32001, Taiwan.,Department of Reproduction, National Research Institute for Child Health and Development, Tokyo, 157-8535, Japan.,Department of Botany and Microbiology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ramitha Arumugam
- Department of Biology, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Abdullah A Alarfaj
- Department of Botany and Microbiology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Murugan A Munusamy
- Department of Botany and Microbiology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Rukman Awang Hamat
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia
| | - Giovanni Benelli
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124, Pisa, Italy.,The BioRobotics Institute, Scuola Superiore Sant'Anna, viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy
| | - Kadarkarai Murugan
- Division of Entomology, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu, India
| | - S Suresh Kumar
- Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, 43400 UPM, Serdang Selangor, Malaysia. .,Department of Biomedical Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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15
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Su L, Zou J, Dong S, Hao N, Xu H. Influence of different β-nucleation agents on poly(l-lactic acid): structure, morphology, and dynamic mechanical behavior. RSC Adv 2017. [DOI: 10.1039/c7ra10550a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The WBG-II and TMB-5000 are both effective nucleating agents, which not only can enhance the crystallization rate, but also alter the packing structure of PLLA chain in the crystals.
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Affiliation(s)
- Lele Su
- School of Materials Science and Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Jun Zou
- School of Materials Science and Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Shengtao Dong
- School of Materials Science and Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Niyuan Hao
- School of Materials Science and Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Haiqing Xu
- Jiangsu Provincial Engineering Laboratory for Advanced Materials of Salt Chemical Industry
- Huaiyin Institute of Technology
- Huaian
- P. R. China
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16
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Im SH, Jung Y, Jang Y, Kim SH. Poly(L-lactic acid) scaffold with oriented micro-valley surface and superior properties fabricated by solid-state drawing for blood-contact biomaterials. Biofabrication 2016; 8:045010. [PMID: 27775924 DOI: 10.1088/1758-5090/8/4/045010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Most biomaterials composed of biodegradable polymers will contact either accidentally or consistently with blood and this commonly requires both good mechanical strength and blood compatibility. Despite this demand, current processing methods still make it difficult and complex to simultaneously improve the two properties. To overcome present limitations, the aim of this work is to develop a solid-state drawing which is a novel method for blood-contact biomaterials that can simultaneously improve the two essential factors of mechanical strength and blood compatibility, as well as induce a micro-patterned surface. Solid-state drawn (SSD) poly(L-lactic acid) (PLLA) film significantly maximally increased tensile strength and elastic modulus about ninefold and sixfold, respectively, compared to undrawn film. Furthermore, it was determined that SSD-PLLA film had highly developed molecular orientation, higher crystallinity and surface hydrophobicity. Additionally, the SSD method could greatly reduce roughness of the surface and induce the formation of aligned valleys, forming microstructures on the film surface. The topographical cue delayed hydrolytic degradation and prevented damage on the surface by NaOH of alkali compounds are compared with undrawn film. In energy-dispersive x-ray spectroscopy analysis, the surface of SSD film treated by NaOH was not detected on any ions whereas undrawn film held foreign ions on surface defects. The hemolysis rate of SSD film was considerably decreased with an increase of draw ratio up to 0.2% maximally and SSD film has shown greatly lower platelet adhesion compared to undrawn film in blood-compatibility analysis. Interestingly, one-directional alignment of micro-valley structure on SSD film could promote initial adhesion of human umbilical vein endothelial cells (HUVEC) compared with undrawn film and guide the direction of HUVEC. In conclusion, the newly designed SSD method has shown potential for developing blood-contact biomaterials simply due to great mechanical properties, blood compatibility and an aligned micro-patterned surface.
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Affiliation(s)
- Seung Hyuk Im
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. Biomaterials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
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Lins LC, Wianny F, Livi S, Hidalgo IA, Dehay C, Duchet-Rumeau J, Gérard JF. Development of Bioresorbable Hydrophilic–Hydrophobic Electrospun Scaffolds for Neural Tissue Engineering. Biomacromolecules 2016; 17:3172-3187. [DOI: 10.1021/acs.biomac.6b00820] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Luanda Chaves Lins
- Ingénierie
des Matériaux Polymères CNRS, UMR 5223; INSA Lyon, Université de Lyon, F-69621 Villeurbanne, France
| | - Florence Wianny
- Inserm,
Stem Cell and Brain Research Institute U1208, Univ Lyon, Université Claude Bernard Lyon 1, 69500 Bron, France
| | - Sébastien Livi
- Ingénierie
des Matériaux Polymères CNRS, UMR 5223; INSA Lyon, Université de Lyon, F-69621 Villeurbanne, France
| | - Idalba Andreina Hidalgo
- Ingénierie
des Matériaux Polymères CNRS, UMR 5223; INSA Lyon, Université de Lyon, F-69621 Villeurbanne, France
| | - Colette Dehay
- Inserm,
Stem Cell and Brain Research Institute U1208, Univ Lyon, Université Claude Bernard Lyon 1, 69500 Bron, France
| | - Jannick Duchet-Rumeau
- Ingénierie
des Matériaux Polymères CNRS, UMR 5223; INSA Lyon, Université de Lyon, F-69621 Villeurbanne, France
| | - Jean-François Gérard
- Ingénierie
des Matériaux Polymères CNRS, UMR 5223; INSA Lyon, Université de Lyon, F-69621 Villeurbanne, France
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18
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Shim E, Pourdeyhimi B, Shiffler D. Process-structure-property relationship of melt spun poly(lactic acid) fibers produced in the spunbond process. J Appl Polym Sci 2016. [DOI: 10.1002/app.44225] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eunkyoung Shim
- 1020 Main Campus Drive; North Carolina State University; Raleigh North Carolina 27695-8301
| | - Behnam Pourdeyhimi
- 1020 Main Campus Drive; North Carolina State University; Raleigh North Carolina 27695-8301
| | - Don Shiffler
- 1020 Main Campus Drive; North Carolina State University; Raleigh North Carolina 27695-8301
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Wu GH, Liu SQ, Wu XY, Ding XM. Influence of MWCNTs modified by silane coupling agent KH570 on the properties and structure of MWCNTs/PLA composite film. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-016-1024-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Ru JF, Yang SG, Zhou D, Yin HM, Lei J, Li ZM. Dominant β-Form of Poly(l-lactic acid) Obtained Directly from Melt under Shear and Pressure Fields. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00595] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jia-Feng Ru
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Shu-Gui Yang
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Dong Zhou
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hua-Mo Yin
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jun Lei
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhong-Ming Li
- College of Polymer Science
and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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21
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The Influence of Solid-State Drawing on Mechanical Properties and Hydrolytic Degradation of Melt-Spun Poly(Lactic Acid) (PLA) Tapes. FIBERS 2015. [DOI: 10.3390/fib3040523] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Computational Bench Testing to Evaluate the Short-Term Mechanical Performance of a Polymeric Stent. Cardiovasc Eng Technol 2015; 6:519-32. [DOI: 10.1007/s13239-015-0235-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 07/07/2015] [Indexed: 10/23/2022]
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23
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Khan AS, Azam MT, Khan M, Mian SA, Rehman IU. An update on glass fiber dental restorative composites: A systematic review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 47:26-39. [DOI: 10.1016/j.msec.2014.11.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 09/22/2014] [Accepted: 11/06/2014] [Indexed: 11/29/2022]
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24
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Yin HM, Xu H, Zhang J, Chen JB, Lei J, Xu JZ, Li ZM. Effects of extrusion draw ratio on the morphology, structure and mechanical properties of poly(l-lactic acid) fabricated using solid state ram extrusion. RSC Adv 2015. [DOI: 10.1039/c5ra10579j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The utilization of an SSRE technique induced highly oriented PLLA.
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Affiliation(s)
- Hua-Mo Yin
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Huan Xu
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Jin Zhang
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Jing-Bin Chen
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Jun Lei
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
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Development of microspheres for biomedical applications: a review. Prog Biomater 2014; 4:1-19. [PMID: 29470791 PMCID: PMC5151111 DOI: 10.1007/s40204-014-0033-8] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 11/25/2014] [Indexed: 02/08/2023] Open
Abstract
An overview of microspheres manufactured for use in biomedical applications based on recent literature is presented in this review. Different types of glasses (i.e. silicate, borate, and phosphates), ceramics and polymer-based microspheres (both natural and synthetic) in the form of porous , non-porous and hollow structures that are either already in use or are currently being investigated within the biomedical area are discussed. The advantages of using microspheres in applications such as drug delivery, bone tissue engineering and regeneration, absorption and desorption of substances, kinetic release of the loaded drug components are also presented. This review also reports on the preparation and characterisation methodologies used for the manufacture of these microspheres. Finally, a brief summary of the existing challenges associated with processing these microspheres which requires further research and development are presented.
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Hossain KMZ, Parsons AJ, Rudd CD, Ahmed I, Thielemans W. Mechanical, crystallisation and moisture absorption properties of melt drawn polylactic acid fibres. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.02.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Hossain KMZ, Hasan MS, Boyd D, Rudd CD, Ahmed I, Thielemans W. Effect of cellulose nanowhiskers on surface morphology, mechanical properties, and cell adhesion of melt-drawn polylactic Acid fibers. Biomacromolecules 2014; 15:1498-506. [PMID: 24725085 DOI: 10.1021/bm5001444] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polylactic acid (PLA) fibers were produced with an average diameter of 11.2 (± 0.9) μm via a melt-drawing process. The surface of the PLA fibers was coated with blends of cellulose nanowhiskers (CNWs) (65 to 95 wt %) and polyvinyl acetate (PVAc). The CNWs bound to the smooth PLA fiber surface imparted roughness, with the degree of roughness depending on the coating blend used. The fiber tensile modulus increased 45% to 7 GPa after coating with 75 wt % CNWs compared with the uncoated PLA fibers, and a significant increase in the fiber moisture absorption properties at different humidity levels was also determined. Cytocompatibility studies using NIH-3T3 mouse fibroblast cells cultured onto CNWs-coated PLA surface revealed improved cell adhesion compared with the PLA control, making this CNW surface treatment applicable for biomedical and tissue engineering applications. Initial studies also showed complete cell coverage within 2 days.
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Affiliation(s)
- Kazi M Zakir Hossain
- Division of Materials, Mechanics and Structures, Faculty of Engineering, ‡School of Chemistry, and §Process and Environmental Research Division, Faculty of Engineering, University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
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28
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Li L, Hashaikeh R, Arafat HA. Development of eco-efficient micro-porous membranes via electrospinning and annealing of poly (lactic acid). J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.02.037] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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29
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You J, Lou L, Yu W, Zhou C. The preparation and crystallization of long chain branching polylactide made by melt radicals reaction. J Appl Polym Sci 2013. [DOI: 10.1002/app.38912] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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30
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Gao C, Ma H, Liu X, Yu L, Chen L, Liu H, Li X, Simon GP. Effects of thermal treatment on the microstructure and thermal and mechanical properties of poly(lactic acid) fibers. POLYM ENG SCI 2012. [DOI: 10.1002/pen.23347] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Structure–property relationship for poly(lactic acid) (PLA) filaments: physical, thermomechanical and shape memory characterization. JOURNAL OF POLYMER RESEARCH 2012. [DOI: 10.1007/s10965-012-9870-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Cui L, Zhu CL, Zhu P, Tsou CH, Yang WJ, Yeh JT. Preparation and physical properties of melt-blown nonwovens of biodegradable PLA/acetyl tributyl citrate/FePol copolyester blends. J Appl Polym Sci 2012. [DOI: 10.1002/app.36429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Stretching-induced crystallinity and orientation of polylactic acid nanofibers with improved mechanical properties using an electrically charged rotating viscoelastic jet. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.07.031] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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Luiz de Paula E, Mano V, Pereira FV. Influence of cellulose nanowhiskers on the hydrolytic degradation behavior of poly(d,l-lactide). Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.06.006] [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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35
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Vasanthan N, Ly H, Ghosh S. Impact of nanoclay on isothermal cold crystallization kinetics and polymorphism of poly(L-lactic acid) nanocomposites. J Phys Chem B 2011; 115:9556-63. [PMID: 21718003 DOI: 10.1021/jp203322d] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Poly(L-lactic acid) (PLLA) intercalated nanocomposite films containing 1, 2, 5, and 10% organically modified montmorillonite (OMMT) have been synthesized by the solvent casting approach. The thermal characteristics, isothermal cold crystallization kinetics, and structural changes of neat PLLA and its nanocomposites during annealing were studied by using differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. DSC observation showed that melting temperature and final crystallinity were not affected significantly with OMMT loading. PLLA films with increasing OMMT content exhibited higher crystallization rates than neat PLLA during annealing and suggested that the silicate platelets act as a nucleation agent during annealing. The effect of OMMT content on the isothermal crystallization kinetics of PLLA was analyzed using the Avrami equation. An Avrami constant of 1-2 was observed, suggesting that crystallization proceeds through one-dimensional growth with heterogeneous nucleation. FTIR investigation showed a band at 922 cm(-1) at all T(a), and no band at 908 cm(-1) suggested that all samples form α crystal regardless of OMMT content or T(a).
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Affiliation(s)
- Nadarajah Vasanthan
- Department of Chemistry, Long Island University, One University Plaza, Brooklyn, New York 11201, USA
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36
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Gaharwar AK, Schexnailder PJ, Dundigalla A, White JD, Matos-Pérez CR, Cloud JL, Seifert S, Wilker JJ, Schmidt G. Highly extensible bio-nanocomposite fibers. Macromol Rapid Commun 2010; 32:50-7. [PMID: 21432969 DOI: 10.1002/marc.201000556] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Revised: 10/20/2010] [Indexed: 11/06/2022]
Abstract
Here, we show that a poly(ethylene oxide) polymer can be physically cross-linked with silicate nanoparticles (Laponite) to yield highly extensible, bio-nanocomposite fibers that, upon pulling, stretch to extreme lengths and crystallize polymer chains. We find that both, nanometer structures and mechanical properties of the fibers respond to mechanical deformation by exhibiting strain-induced crystallization and high elongation. We explore the structural characteristics using X-ray scattering and the mechanical properties of the dried fibers made from hydrogels in order to determine feasibility for eventual biomedical use and to map out directions for further materials development.
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Affiliation(s)
- Akhilesh K Gaharwar
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
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37
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Novel microwave-assisted synthesis of poly(D,L-lactide): the influence of monomer/initiator molar ratio on the product properties. SENSORS 2010; 10:5063-73. [PMID: 22399924 PMCID: PMC3292164 DOI: 10.3390/s100505063] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 04/26/2010] [Accepted: 04/28/2010] [Indexed: 11/17/2022]
Abstract
Poly(D,L-lactide) synthesis using tin(II) 2-ethylhexanoate initiated ring-opening polymerization (ROP) takes over 30 hours in bulk at 120 °C. The use of microwave makes the same bulk polymerization process with the same initiator much faster and energy saving, with a reaction time of about 30 minutes at 100 °C. Here, the poly(lactide) synthesis was done in a microwave reactor, using frequency of 2.45 GHz and maximal power of 150 W. The reaction temperature was controlled via infra-red system for in-bulk-measuring, and was maintained at 100 °C. Different molar ratios of monomer and initiator, [M]/[I], of 1,000, 5,000 and 10,000 were used. The achieved average molar masses for the obtained polymers (determined by gel permeation chromatography) were in the interval from 26,700 to 112,500 g/mol. The polydispersion index was from 2.436 to 3.425. For applicative purposes, the obtained material was purified during the procedure of microsphere preparation. Microspheres were obtained by spraying a fine fog of polymer (D,L-lactide) solution in tetrahydrofuran into the water solution of poly(vinyl alcohol) with intensive stirring.
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38
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Rissanen M, Puolakka A, Hukka T, Ellä V, Kellomäki M, Nousiainen P. Effect of hot drawing on properties of wet-spun poly(L,D-lactide) copolymer multifilament fibers. J Appl Polym Sci 2010. [DOI: 10.1002/app.31015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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40
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Muranaka M, Ono T. Role of dispersion stabilizer with hydroxy groups in preparation of monodisperse polylactide microspheres. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23572] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Rissanen M, Puolakka A, Hukka T, Ellä V, Nousiainen P, Kellomäki M. Effect of process parameters on properties of wet-spun poly(L,D-lactide) copolymer multifilament fibers. J Appl Polym Sci 2009. [DOI: 10.1002/app.30387] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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43
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Muranaka M, Ono T. Preparation of Monodisperse Polylactide Microspheres by Dispersion Polymerization Using a Polymeric Stabilizer with Hydroxy Groups. Macromol Rapid Commun 2008; 30:152-6. [DOI: 10.1002/marc.200800620] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 11/19/2008] [Accepted: 11/25/2008] [Indexed: 11/06/2022]
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45
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Fujimori A, Ninomiya N, Masuko T. Structure and mechanical properties in drawn poly(l-lactide)/clay hybrid films. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1189] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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46
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47
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Afshari M, Gupta A, Jung D, Kotek R, Tonelli A, Vasanthan N. Properties of films and fibers obtained from Lewis acid–base complexed nylon 6,6. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.01.038] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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48
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Ahmann D, Dorgan JR. Bioengineering for pollution prevention through development of biobased energy and materials state of the science report. Ind Biotechnol (New Rochelle N Y) 2007. [DOI: 10.1089/ind.2007.3.218] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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49
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Sawai D, Tamada M, Kanamoto T. Development of Oriented Morphology and Mechanical Properties upon Drawing of Stereo-Complex of Poly(L-lactic acid) and Poly(D-lactic acid) by Solid-State Coextrusion. Polym J 2007. [DOI: 10.1295/polymj.pj2007038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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