201
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Wei L, Shicheng H, Hongfu Z. Effect of octa(epoxycyclohexyl) POSS on thermal, rheology property, and foaming behavior of PLA composites. J Appl Polym Sci 2018. [DOI: 10.1002/app.46399] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Liu Wei
- School of Materials and Metallurgical Engineering; Guizhou Institute of Technology; Guiyang City Guizhou Province 550003 People's Republic of China
| | - He Shicheng
- School of Materials and Metallurgical Engineering; Guizhou Institute of Technology; Guiyang City Guizhou Province 550003 People's Republic of China
| | - Zhou Hongfu
- Key laboratory of Processing and Quality Evaluation Technology of Green Plastics of China National Light Industry council; Beijing Technology and Business University; Beijing 100048 China
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202
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Klonos P, Sulym IY, Sternik D, Konstantinou P, Goncharuk OV, Deryło–Marczewska A, Gun'ko VM, Kyritsis A, Pissis P. Morphology, crystallization and rigid amorphous fraction in PDMS adsorbed onto carbon nanotubes and graphite. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.02.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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203
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Argentati C, Morena F, Montanucci P, Rallini M, Basta G, Calabrese N, Calafiore R, Cordellini M, Emiliani C, Armentano I, Martino S. Surface Hydrophilicity of Poly(l-Lactide) Acid Polymer Film Changes the Human Adult Adipose Stem Cell Architecture. Polymers (Basel) 2018; 10:polym10020140. [PMID: 30966176 PMCID: PMC6414915 DOI: 10.3390/polym10020140] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 01/23/2018] [Accepted: 01/31/2018] [Indexed: 01/09/2023] Open
Abstract
Current knowledge indicates that the molecular cross-talk between stem cells and biomaterials guides the stem cells’ fate within a tissue engineering system. In this work, we have explored the effects of the interaction between the poly(l-lactide) acid (PLLA) polymer film and human adult adipose stem cells (hASCs), focusing on the events correlating the materials’ surface characteristics and the cells’ plasma membrane. hASCs were seeded on films of pristine PLLA polymer and on a PLLA surface modified by the radiofrequency plasma method under oxygen flow (PLLA+O2). Comparative experiments were performed using human bone-marrow mesenchymal stem cells (hBM-MSCs) and human umbilical matrix stem cells (hUCMSCs). After treatment with oxygen-plasma, the surface of PLLA films became hydrophilic, whereas the bulk properties were not affected. hASCs cultured on pristine PLLA polymer films acquired a spheroid conformation. On the contrary, hASCs seeded on PLLA+O2 film surface maintained the fibroblast-like morphology typically observed on tissue culture polystyrene. This suggests that the surface hydrophilicity is involved in the acquisition of the spheroid conformation. Noteworthy, the oxygen treatment had no effects on hBM-MSC and hUCMSC cultures and both stem cells maintained the same shape observed on PLLA films. This different behavior suggests that the biomaterial-interaction is stem cell specific.
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Affiliation(s)
- Chiara Argentati
- Department of Chemistry, Biology and Biotechnologies, Biochemistry and Molecular Biology Unit, University of Perugia, Via del Giochetto, 06126 Perugia, Italy.
| | - Francesco Morena
- Department of Chemistry, Biology and Biotechnologies, Biochemistry and Molecular Biology Unit, University of Perugia, Via del Giochetto, 06126 Perugia, Italy.
| | - Pia Montanucci
- Section of Cardiovascular, Endocrine and Metabolic Clinical Physiology, Laboratory for Endocrine Cell Transplants and Biohybrid Organs, Department of Medicine, University of Perugia, 06126 Perugia, Italy.
| | - Marco Rallini
- Civil and Environmental Engineering Department, UdR INSTM, University of Perugia, 05100 Terni, Italy.
| | - Giuseppe Basta
- Section of Cardiovascular, Endocrine and Metabolic Clinical Physiology, Laboratory for Endocrine Cell Transplants and Biohybrid Organs, Department of Medicine, University of Perugia, 06126 Perugia, Italy.
| | | | - Riccardo Calafiore
- Section of Cardiovascular, Endocrine and Metabolic Clinical Physiology, Laboratory for Endocrine Cell Transplants and Biohybrid Organs, Department of Medicine, University of Perugia, 06126 Perugia, Italy.
| | | | - Carla Emiliani
- Department of Chemistry, Biology and Biotechnologies, Biochemistry and Molecular Biology Unit, University of Perugia, Via del Giochetto, 06126 Perugia, Italy.
| | - Ilaria Armentano
- Department of Ecological and Biological Sciences, Tuscia University, 01100 Viterbo, Italy.
| | - Sabata Martino
- Department of Chemistry, Biology and Biotechnologies, Biochemistry and Molecular Biology Unit, University of Perugia, Via del Giochetto, 06126 Perugia, Italy.
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204
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Yokoyama N, Kanazawa A, Kanaoka S, Aoshima S. Synthesis of Highly Defined Graft Copolymers Using a Cyclic Acetal Moiety as a Two-Stage Latent Initiating Site for Successive Living Cationic Polymerization and Ring-Opening Anionic Polymerization. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02622] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Norifumi Yokoyama
- Department of Macromolecular
Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Arihiro Kanazawa
- Department of Macromolecular
Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Shokyoku Kanaoka
- Department of Macromolecular
Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Sadahito Aoshima
- Department of Macromolecular
Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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205
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Seki Y, Kanazawa A, Kanaoka S, Fujiwara T, Aoshima S. Precision Synthesis of Polylactide-Based Thermoresponsive Block Copolymers via Successive Living Cationic Polymerization of Vinyl Ether and Ring-Opening Polymerization of Lactide. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02329] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yukiko Seki
- Department
of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Arihiro Kanazawa
- Department
of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Shokyoku Kanaoka
- Department
of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Tomoko Fujiwara
- Department of Chemistry, The University of Memphis, 213 Smith Chemistry
Building, Memphis, Tennessee 38152, United States
| | - Sadahito Aoshima
- Department
of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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206
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Shi X, Qin J, Wang L, Ren L, Rong F, Li D, Wang R, Zhang G. Introduction of stereocomplex crystallites of PLA for the solid and microcellular poly(lactide)/poly(butylene adipate-co-terephthalate) blends. RSC Adv 2018; 8:11850-11861. [PMID: 35539374 PMCID: PMC9079314 DOI: 10.1039/c8ra01570h] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 03/12/2018] [Indexed: 11/24/2022] Open
Abstract
Solid and microcellular poly(l-lactide)/poly(butylene adipate-co-terephthalate) (PLLA/PBAT) blends with or without poly(d-lactide) (PDLA) were prepared via melt blending and batch foaming process with supercritical carbon dioxide, respectively. The introduction of PDLA on the rheological properties, crystallization behavior and dynamic mechanical properties of the PLLA matrix were investigated. The formed PLA stereocomplex between PLLA and PDLA enhanced the storage modulus and complex viscosity of PLLA/PBAT blends efficiently. Interestingly, the addition of 5 wt% or 10 wt% PDLA in the PLLA/PBAT blends was unfavorable for the PLLA crystallization behavior. The potential reason can be sc-PLA crystallites acting as the physical crosslinking points, which constrained the molecular mobility of the PLLA matrix and even blocked the nucleating effect of PBAT domains. Both the enhanced melt strength and decreased crystallinity of the PLLA matrix are favorable for the cell nucleation and growth and the gas adsorption, respectively. The designed partially foaming of PLLA/PBAT with or without PDLA was carried out to investigate the foaming mechanism. The final cell morphology of PLLA/PBAT foams exhibited typical open-cell structure mainly attributed to the soft immiscible PBAT phase as separated domains. With further addition of PDLA in the PLLA/PBAT blends, the microcellular morphology exhibited decreased average cell size and increased cell density. The sc-PLA crystallites networks in the PLLA matrix acted as cell nucleating agents, which meanwhile resisted the force of cell growth and then prevented the cell collapse. The introduced PLA stereocomplex could enhance the melting strength of PLLA/PBAT blends efficiently. The microcellular morphology of PLLA/PBAT foams with PDLA exhibited decreased average cell size and increased cell density.![]()
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Affiliation(s)
- Xuetao Shi
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
| | - Jianbin Qin
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
| | - Long Wang
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
| | - Liucheng Ren
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
| | - Fan Rong
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
| | - Daiheng Li
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
| | - Ryan Wang
- Total Corbion PLA BV
- Shanghai 200021
- China
| | - Guangcheng Zhang
- Department of Applied Chemistry
- School of Science
- Northwestern Polytechnical University
- Xi'an
- China
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207
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Synthesis of Poly(lactic acid)-block-poly(N,N-dimethylaminoethyl methacrylate) Copolymers with Controllable Block Structures via Reversible Addition Fragmentation Polymerization from Aminolyzed Poly(lactic acid). INT J POLYM SCI 2018. [DOI: 10.1155/2018/7361659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Poly(lactic acid)-block-poly(N,N-dimethylaminoethyl methacrylate) (PLA-PDMAEMA) copolymers were synthesized from aminolyzed PLA via reversible addition fragmentation (RAFT) polymerization. PLA undergoes aminolytic degradation with ethylenediamine (EDA). The kinetics of the aminolysis reaction of PLA at different temperatures and EDA concentrations was investigated in detail. The molar masses of products rapidly decreased in the initial stage at low aminolytic degree. Meanwhile, reactive –NH2 and –OH groups were introduced to the end of shorter PLA chains and used as sites to further immobilize the RAFT agent. PLA-PDMAEMA block copolymers were synthesized. A pseudo-first-order reaction kinetics was observed for the RAFT polymerization of PDMAEMA at a low conversion. By controlling the aminolysis reaction of PLA and RAFT polymerization degree of DMAEMA, the length distributions of the PLA and PDMAEMA blocks can be controlled. This method can be extended to more systems to obtain block copolymers with controllable block structure.
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208
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Effect of hydrophobic fluoropolymer and crystallinity on the hydrolytic degradation of poly(lactic acid). Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.09.044] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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209
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Zhang J, Zheng T, Alarçin E, Byambaa B, Guan X, Ding J, Zhang YS, Li Z. Porous Electrospun Fibers with Self-Sealing Functionality: An Enabling Strategy for Trapping Biomacromolecules. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:10.1002/smll.201701949. [PMID: 29094479 PMCID: PMC5845855 DOI: 10.1002/smll.201701949] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/25/2017] [Indexed: 05/30/2023]
Abstract
Stimuli-responsive porous polymer materials have promising biomedical application due to their ability to trap and release biomacromolecules. In this work, a class of highly porous electrospun fibers is designed using polylactide as the polymer matrix and poly(ethylene oxide) as a porogen. Carbon nanotubes (CNTs) with different concentrations are further impregnated onto the fibers to achieve self-sealing functionality induced by photothermal conversion upon light irradiation. The fibers with 0.4 mg mL-1 of CNTs exhibit the optimum encapsulation efficiency of model biomacromolecules such as dextran, bovine serum albumin, and nucleic acids, although their photothermal conversion ability is slightly lower than the fibers with 0.8 mg mL-1 of CNTs. Interestingly, reversible reopening of the surface pores is accomplished with the degradation of PLA, affording a further possibility for sustained release of biomacromolecules after encapsulation. Effects of CNT loading on fiber morphology, structure, thermal/mechanical properties, degradation, and cell viability are also investigated. This novel class of porous electrospun fibers with self-sealing capability has great potential to serve as an enabling strategy for trapping/release of biomacromolecules with promising applications in, for example, preventing inflammatory diseases by scavenging cytokines from interstitial body fluids.
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Affiliation(s)
- Jin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Ting Zheng
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Emine Alarçin
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Batzaya Byambaa
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Xiaofei Guan
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Zhongming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
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210
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Santos LG, Costa LC, Pessan LA. Development of biodegradable PLA/PBT nanoblends. J Appl Polym Sci 2017. [DOI: 10.1002/app.45951] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Luiza Gouvêa Santos
- Department of Materials Engineering; Federal University of Sao Carlos (UFSCar); Sao Carlos-SP 13565-970 Brazil
| | - Lidiane Cristina Costa
- Department of Materials Engineering; Federal University of Sao Carlos (UFSCar); Sao Carlos-SP 13565-970 Brazil
| | - Luiz Antonio Pessan
- Department of Materials Engineering; Federal University of Sao Carlos (UFSCar); Sao Carlos-SP 13565-970 Brazil
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211
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Fallahiarezoudar E, Ahmadipourroudposht M, Yusof NM, Idris A, Ngadiman NHA. 3D Biofabrication of Thermoplastic Polyurethane (TPU)/Poly-l-lactic Acid (PLLA) Electrospun Nanofibers Containing Maghemite (γ-Fe₂O₃) for Tissue Engineering Aortic Heart Valve. Polymers (Basel) 2017; 9:E584. [PMID: 30965883 PMCID: PMC6418800 DOI: 10.3390/polym9110584] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/24/2017] [Accepted: 11/03/2017] [Indexed: 01/04/2023] Open
Abstract
Valvular dysfunction as the prominent reason of heart failure may causes morbidity and mortality around the world. The inability of human body to regenerate the defected heart valves necessitates the development of the artificial prosthesis to be replaced. Besides, the lack of capacity to grow, repair or remodel of an artificial valves and biological difficulty such as infection or inflammation make the development of tissue engineering heart valve (TEHV) concept. This research presented the use of compound of poly-l-lactic acid (PLLA), thermoplastic polyurethane (TPU) and maghemite nanoparticle (γ-Fe₂O₃) as the potential biomaterials to develop three-dimensional (3D) aortic heart valve scaffold. Electrospinning was used for fabricating the 3D scaffold. The steepest ascent followed by the response surface methodology was used to optimize the electrospinning parameters involved in terms of elastic modulus. The structural and porosity properties of fabricated scaffold were characterized using FE-SEM and liquid displacement technique, respectively. The 3D scaffold was then seeded with aortic smooth muscle cells (AOSMCs) and biological behavior in terms of cell attachment and proliferation during 34 days of incubation was characterized using MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and confocal laser microscopy. Furthermore, the mechanical properties in terms of elastic modulus and stiffness were investigated after cell seeding through macro-indentation test. The analysis indicated the formation of ultrafine quality of nanofibers with diameter distribution of 178 ± 45 nm and 90.72% porosity. In terms of cell proliferation, the results exhibited desirable proliferation (109.32 ± 3.22% compared to the control) of cells over the 3D scaffold in 34 days of incubation. The elastic modulus and stiffness index after cell seeding were founded to be 22.78 ± 2.12 MPa and 1490.9 ± 12 Nmm², respectively. Overall, the fabricated 3D scaffold exhibits desirable structural, biological and mechanical properties and has the potential to be used in vivo.
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Affiliation(s)
- Ehsan Fallahiarezoudar
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| | - Mohaddeseh Ahmadipourroudposht
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| | - Noordin Mohd Yusof
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| | - Ani Idris
- Department of Bioprocess Engineering, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| | - Nor Hasrul Akhmal Ngadiman
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
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212
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Abdalkarim SYH, Yu HY, Song ML, Zhou Y, Yao J, Ni QQ. In vitro degradation and possible hydrolytic mechanism of PHBV nanocomposites by incorporating cellulose nanocrystal-ZnO nanohybrids. Carbohydr Polym 2017; 176:38-49. [DOI: 10.1016/j.carbpol.2017.08.051] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/05/2017] [Accepted: 08/10/2017] [Indexed: 01/20/2023]
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213
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Design of biobased PLLA triblock copolymers for sustainable food packaging: Thermo-mechanical properties, gas barrier ability and compostability. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.08.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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214
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Yang B, Raza S, Li S, Deng J. Ring opening precipitation polymerization for preparing polylactide particles with tunable size and porous structure and their application as chiral material. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.09.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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215
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Bai H, Deng S, Bai D, Zhang Q, Fu Q. Recent Advances in Processing of Stereocomplex-Type Polylactide. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201700454] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 07/26/2017] [Indexed: 01/18/2023]
Affiliation(s)
- Hongwei Bai
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Shihao Deng
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Dongyu Bai
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Qin Zhang
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
| | - Qiang Fu
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 P. R. China
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216
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Wang LN, Guo Wang PY, Wei JC. Graphene Oxide-Graft-Poly(l-lactide)/Poly(l-lactide) Nanocomposites: Mechanical and Thermal Properties. Polymers (Basel) 2017; 9:E429. [PMID: 30965732 PMCID: PMC6418508 DOI: 10.3390/polym9090429] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 08/30/2017] [Accepted: 09/03/2017] [Indexed: 12/02/2022] Open
Abstract
The surface modification of graphene sheets with polymer chains may greatly hinder its aggregation and improve its phase compatibility with a polymer matrix. In this work, poly(l-lactic acid)-grafted graphene oxide (GO-g-PLLA) was prepared via a simple condensation polymerization method, realizing its dispersion well in organic solvents, which demonstrated that the surface of GO changed from hydrophilic to hydrophobic. GO-g-PLLA can disperse homogeneously in the PLLA matrix, and the tensile test showed that the mechanical properties of GO-g-PLLA/PLLA were much better than that of GO/PLLA; compared with GO, only 3% GO-g-PLLA content can realize a 37.8% increase in the tensile strength for their PLLA composites. Furthermore, the differential scanning calorimetry (DSC) and polarized optical microscopy (POM) results demonstrated that GO-g-PLLA shows a nucleating agent effect and can promote the crystallization of PLLA.
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Affiliation(s)
- Li-Na Wang
- College of Science, Nanchang Institute of Technology, Nanchang 330029, China.
| | - Pei-Yao Guo Wang
- College of Chemistry, Nanchang University, Nanchang 330031, China.
| | - Jun-Chao Wei
- College of Chemistry, Nanchang University, Nanchang 330031, China.
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217
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Muller J, González-Martínez C, Chiralt A. Combination of Poly(lactic) Acid and Starch for Biodegradable Food Packaging. MATERIALS 2017; 10:ma10080952. [PMID: 28809808 PMCID: PMC5578318 DOI: 10.3390/ma10080952] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 01/24/2023]
Abstract
The massive use of synthetic plastics, in particular in the food packaging area, has a great environmental impact, and alternative more ecologic materials are being required. Poly(lactic) acid (PLA) and starch have been extensively studied as potential replacements for non-degradable petrochemical polymers on the basis of their availability, adequate food contact properties and competitive cost. Nevertheless, both polymers exhibit some drawbacks for packaging uses and need to be adapted to the food packaging requirements. Starch, in particular, is very water sensitive and its film properties are heavily dependent on the moisture content, exhibiting relatively low mechanical resistance. PLA films are very brittle and offer low resistance to oxygen permeation. Their combination as blend or multilayer films could provide properties that are more adequate for packaging purposes on the basis of their complementary characteristics. The main characteristics of PLA and starch in terms of not only the barrier and mechanical properties of their films but also of their combinations, by using blending or multilayer strategies, have been analyzed, identifying components or processes that favor the polymer compatibility and the good performance of the combined materials. The properties of some blends/combinations have been discussed in comparison with those of pure polymer films.
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Affiliation(s)
- Justine Muller
- Universidad Politécnica de Valencia, IIAD, Camino de Vera, s/n, 46022 València, Spain.
| | | | - Amparo Chiralt
- Universidad Politécnica de Valencia, IIAD, Camino de Vera, s/n, 46022 València, Spain.
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218
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Demina TS, Bardakova KN, Minaev NV, Svidchenko EA, Istomin AV, Goncharuk GP, Vladimirov LV, Grachev AV, Zelenetskii AN, Timashev PS, Akopova TA. Two-Photon-Induced Microstereolithography of Chitosan-g-Oligolactides as a Function of Their Stereochemical Composition. Polymers (Basel) 2017; 9:E302. [PMID: 30970980 PMCID: PMC6432183 DOI: 10.3390/polym9070302] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 12/27/2022] Open
Abstract
Chitosan-g-oligolactide copolymers with relatively long oligolactide grafted chains of various stereochemical compositions have been synthetized via a solvent-free mechanochemical technique and tailored to fabricate three-dimensional hydrogels using two-photon induced microstereolithography. An effect of the characteristics of chitosan and oligolactide used for the synthesis on the grafting yield and copolymer's behavior were evaluated using fractional analysis, FTIR-spectroscopy, dynamic light scattering, and UV-spectrophotometry. The lowest copolymer yield was found for the system based on chitosan with higher molecular weight, while the samples consisting of low-molecular weight chitosan showed higher grafting degrees, which were comparable in both the cases of l,l- or l,d-oligolactide grafting. The copolymer processability in the course of two-photon stereolithography was evaluated as a function of the copolymer's characteristics and stereolithography conditions. The structure and mechanical properties of the model film samples and fabricated 3D hydrogels were studied using optical and scanning electron microscopy, as well as by using tensile and nanoindenter devices. The application of copolymer with oligo(l,d-lactide) side chains led to higher processability during two-photon stereolithography in terms of the response to the laser beam, reproduction of the digital model, and the mechanical properties of the fabricated hydrogels.
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Affiliation(s)
- Tatiana S Demina
- Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 Profsoyuznaya str., Moscow 117393, Russia.
| | - Kseniia N Bardakova
- Institute of Photonic Technologies, Research center "Crystallography and Photonics", Russian Academy of Sciences, 2 Pionerskaya str., Troitsk, Moscow 142190, Russia.
- Institute for Regenerative Medicine, Sechenov University, 8-2 Trubetskaya st., Moscow 119991, Russia.
| | - Nikita V Minaev
- Institute of Photonic Technologies, Research center "Crystallography and Photonics", Russian Academy of Sciences, 2 Pionerskaya str., Troitsk, Moscow 142190, Russia.
| | - Eugenia A Svidchenko
- Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 Profsoyuznaya str., Moscow 117393, Russia.
| | - Alexander V Istomin
- Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 Profsoyuznaya str., Moscow 117393, Russia.
| | - Galina P Goncharuk
- Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 Profsoyuznaya str., Moscow 117393, Russia.
| | - Leonid V Vladimirov
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 Kosygina str., Moscow 119334, Russia.
| | - Andrey V Grachev
- Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 Kosygina str., Moscow 119334, Russia.
| | - Alexander N Zelenetskii
- Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 Profsoyuznaya str., Moscow 117393, Russia.
| | - Peter S Timashev
- Institute of Photonic Technologies, Research center "Crystallography and Photonics", Russian Academy of Sciences, 2 Pionerskaya str., Troitsk, Moscow 142190, Russia.
- Institute for Regenerative Medicine, Sechenov University, 8-2 Trubetskaya st., Moscow 119991, Russia.
| | - Tatiana A Akopova
- Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, 70 Profsoyuznaya str., Moscow 117393, Russia.
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219
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Demina TS, Gilman AB, Zelenetskii AN. Application of high-energy chemistry methods to the modification of the structure and properties of polylactide (a review). HIGH ENERGY CHEMISTRY 2017. [DOI: 10.1134/s0018143917040038] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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220
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Terminal group effects of phosphazene-triazine bi-group flame retardant additives in flame retardant polylactic acid composites. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.04.024] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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221
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UV protective poly(lactic acid)/rosin films for sustainable packaging. Int J Biol Macromol 2017; 99:37-45. [DOI: 10.1016/j.ijbiomac.2017.01.152] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 01/16/2017] [Accepted: 01/26/2017] [Indexed: 11/18/2022]
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222
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Ru JF, Yang SG, Lei J, Li ZM. Thicker Lamellae and Higher Crystallinity of Poly(lactic acid) via Applying Shear Flow and Pressure and Adding Poly(ethylene Glycol). J Phys Chem B 2017; 121:5842-5852. [DOI: 10.1021/acs.jpcb.7b02241] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- 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
| | - 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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223
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Xiang C, Acevedo NC. In Situ Self-Assembled Nanocomposites from Bacterial Cellulose Reinforced with Eletrospun Poly(lactic acid)/Lipids Nanofibers. Polymers (Basel) 2017; 9:E179. [PMID: 30970859 PMCID: PMC6432321 DOI: 10.3390/polym9050179] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 05/12/2017] [Accepted: 05/14/2017] [Indexed: 11/16/2022] Open
Abstract
The goal of this study is to explore a new strategy to improve the mechanical and hydrophobic properties of bacterial cellulose (BC) mats. The present work is the first to report the preparation of in situ self-assembled BC nanocomposites using electrospun hydrophobic poly(lactic acid) (PLA) or PLA/lipids (PLA/Lip) nanofiber mats as foundation for BC nanofiber growth. Adding electrospun PLA mats to the BC culture media led to a two-fold increase in toughness with a 52% increase in elongation of the nanocomposites with regard to BC. The incorporation of electrospun PLA and PLA/Lip nanofiber mats lowered the moisture regain and water vapor transmission of BC nanocomposites relative to pure BC mats. The interfacial bonding between the individual components of a nanocomposite is a key factor for the improvement of composite strength, stiffness, and barrier properties; thus additional strategies to improve interaction between hydrophilic BC and hydrophobic PLA fibers need to be explored.
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Affiliation(s)
- Chunhui Xiang
- Department of Apparel, Events, and Hospitality Management, Iowa State University, Ames, IA 50011, USA.
| | - Nuria C Acevedo
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, USA.
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224
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Cao H, Zhang Y, Li X, Wang F, Zhang X. Effects of treated waste silicon rubber on properties of poly(lactic acid)/ammonium polyphosphate composites. J Appl Polym Sci 2017. [DOI: 10.1002/app.45231] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hongwei Cao
- State Grid Henan Electric Power Research Institute; Zhengzhou 450052 China
| | - Yan Zhang
- Laboratory of Polymer Materials and Engineering; Ningbo Institute of Technology, Zhejiang University; Ningbo 315100 China
| | - Xiaonan Li
- Laboratory of Polymer Materials and Engineering; Ningbo Institute of Technology, Zhejiang University; Ningbo 315100 China
| | - Fengtao Wang
- State Grid Henan Electric Power Research Institute; Zhengzhou 450052 China
| | - Xiaoni Zhang
- State Grid Henan Electric Power Research Institute; Zhengzhou 450052 China
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225
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Laube T, Weisser J, Berger S, Börner S, Bischoff S, Schubert H, Gajda M, Bräuer R, Schnabelrauch M. In situ foamable, degradable polyurethane as biomaterial for soft tissue repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:163-174. [PMID: 28575970 DOI: 10.1016/j.msec.2017.04.061] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 04/06/2017] [Accepted: 04/11/2017] [Indexed: 12/12/2022]
Abstract
Degradable foams which can be inserted endoscopically as liquid or pasty mixtures into soft tissue defects possess a promising potential for the surgical treatment of such defects. The defects can be sealed under in situ foaming and simultaneous material expansion. We developed an in situ foamable (l-lactide-co-ε-caprolactone)-based, star-shaped prepolymer by ring opening polymerization of l-lactide and ε-caprolactone in the presence of meso-erythritol as starter. By conversion of the terminal hydroxyl groups of the formed oligoester with lysine diisocyanate ethyl ester (LDI) an isocyanate-endcapped, reactive prepolymer has been received. Foaming can be initiated by addition of 1,4-diazabicyclo[2,2,2]octane (DABCO), water, LDI and DMSO. By varying the composition of these additives, the foaming and curing time could be varied within a clinically acceptable range. A porosity of approximately 90%, and an average tensile strength of 0.3MPa with elongations of 90% were determined for the foams. In vitro cytotoxicity on cured foams was assayed on 3T3 fibroblasts and demonstrated an excellent cytocompatibility. This was also confirmed in an in vivo study using an established rat model, where prefabricated foams and in situ hardening material were inserted into subdermal skin incisions in parallel. The feature of chronic inflammation was only weakly developed in both groups and slightly more pronounced and persisted for longer time in the group of in situ foamed material. In both groups the foreign materials were vascularized, degraded and substituted by connective tissue. The results encourage to proceed with trials where the materials are used to fill more heavily loaded defects.
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Affiliation(s)
| | | | - Stefan Berger
- INNOVENT e.V., Biomaterials Department, Jena, Germany
| | - Stefan Börner
- Institute of Materials Science and Technology, Friedrich Schiller University Jena, Jena, Germany
| | - Sabine Bischoff
- Institute of Animal Research and Protection, University Hospital Jena, Jena, Germany
| | - Harald Schubert
- Institute of Animal Research and Protection, University Hospital Jena, Jena, Germany
| | | | - Rolf Bräuer
- Institute of Pathology, University Hospital Jena, Jena, Germany
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226
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Fallahiarezoudar E, Ahmadipourroudposht M, Idris A, Yusof NM. Optimization and development of Maghemite (γ-Fe 2O 3) filled poly-l-lactic acid (PLLA)/thermoplastic polyurethane (TPU) electrospun nanofibers using Taguchi orthogonal array for tissue engineering heart valve. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:616-627. [PMID: 28482571 DOI: 10.1016/j.msec.2017.03.120] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 12/13/2022]
Abstract
Tissue engineering (TE) is an advanced principle to develop a neotissue that can resemble the original tissue characteristics with the capacity to grow, to repair and to remodel in vivo. This research proposed the optimization and development of nanofiber based scaffold using the new mixture of maghemite (γ-Fe2O3) filled poly-l-lactic acid (PLLA)/thermoplastic polyurethane (TPU) for tissue engineering heart valve (TEHV). The chemical, structural, biological and mechanical properties of nanofiber based scaffold were characterized in terms of morphology, porosity, biocompatibility and mechanical behaviour. Two-level Taguchi experimental design (L8) was performed to optimize the electrospun mats in terms of elastic modulus using uniaxial tensile test where the studied parameters were flow rate, voltage, percentage of maghemite nanoparticles in the content, solution concentration and collector rotating speed. Each run was extended with an outer array to consider the noise factors. The signal-to-noise ratio analysis indicated the contribution percent as follow; Solution concentration>voltage>maghemite %>rotating speed>flow rate. The optimum elastic modulus founded to be 28.13±0.37MPa in such a way that the tensile strain was 31.72% which provided desirability for TEHV. An empirical model was extracted and verified using confirmation test. Furthermore, an ultrafine quality of electrospun nanofibers with 80.32% porosity was fabricated. The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and cell attachment using human aortic smooth muscle cells exhibited desirable migration and proliferation over the electrospun mats. The interaction between blood content and the electrospun mats indicated a mutual adaption in terms of clotting time and hemolysis percent. Overall, the fabricated scaffold has the potential to provide the required properties of aortic heart valve.
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Affiliation(s)
- Ehsan Fallahiarezoudar
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia.
| | - Mohaddeseh Ahmadipourroudposht
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
| | - Ani Idris
- Department of Bioprocess Engineering, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
| | - Noordin Mohd Yusof
- Department of Materials, Manufacturing & Industrial Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
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227
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Caldas Dos Santos T, Rescignano N, Boff L, Reginatto FH, Simões CMO, de Campos AM, Mijangos C. In vitro antiherpes effect of C-glycosyl flavonoid enriched fraction of Cecropia glaziovii encapsulated in PLGA nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:1214-1220. [PMID: 28415409 DOI: 10.1016/j.msec.2017.02.135] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 12/15/2016] [Accepted: 02/24/2017] [Indexed: 01/18/2023]
Abstract
In this work is reported a novel and promising approach for the preparation of C-glycosylflavonoid enriched fraction of Cecropia glaziovii (EFF-Cg) loaded PLGA nanoparticles (NP) with antiherpes properties. The purpose of this study was to evaluate and to compare the effect of two nonionic surfactants (poloxamer 188 (PLU) and polyvinyl alcohol (PVA)), and also an emulsion stabilized by solid particles of cellulose nanocrystal (CNC) in place of surfactants. The characterization of these nanoparticles was in terms of size, polydispersity index, zeta potential, morphology, thermogravimetric analysis (TGA), loading capacity and percent yield. Since TGA analysis revealed thermo stability especially for NP-PLU, this formulation was selected for the evaluation of drug release profile, cytotoxicity and antiherpes activity. The drug delivery profile demonstrated a sustained release through the polymer structure and a significant reduction of the polymer molecular weight at 21-day period. The cytotoxicity of these nanoparticles was determined on Vero cells, and the selected formulation did not exhibit cytotoxicity even at the highest tested concentration. The results demonstrated a potential antiherpetic effect of the EFF-Cg loaded NP at 48h of testing. In summary, EFF-Cg loaded NP exhibited a promising system for the effective drug delivery in the treatment of herpes infections.
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Affiliation(s)
- Talitha Caldas Dos Santos
- Institute of Polymer Science and Technology, ICTP - CSIC, Madrid 28006, Spain; Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, Florianópolis 88040900, Brazil.
| | | | - Laurita Boff
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, Florianópolis 88040900, Brazil.
| | - Flávio Henrique Reginatto
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, Florianópolis 88040900, Brazil.
| | | | - Angela Machado de Campos
- Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, Florianópolis 88040900, Brazil.
| | - Carmen Mijangos
- Institute of Polymer Science and Technology, ICTP - CSIC, Madrid 28006, Spain.
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228
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Klonos P, Pissis P. Effects of interfacial interactions and of crystallization on rigid amorphous fraction and molecular dynamics in polylactide/silica nanocomposites: A methodological approach. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.02.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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229
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Liu H, Bai H, Bai D, Liu Z, Zhang Q, Fu Q. Design of high-performance poly(l-lactide)/elastomer blends through anchoring carbon nanotubes at the interface with the aid of stereocomplex crystallization. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.11.034] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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230
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Lin ST, Kimble L, Bhattacharyya D. Polymer Blends and Composites for Biomedical Applications. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/978-3-662-53574-5_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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231
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Li J, Ding J, Liu T, Liu JF, Yan L, Chen X. Poly(lactic acid) Controlled Drug Delivery. INDUSTRIAL APPLICATIONS OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2017_11] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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232
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Thermal Properties and Thermodynamics of Poly(l-lactic acid). SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2017_19] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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233
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Domenek S, Fernandes-Nassar S, Ducruet V. Rheology, Mechanical Properties, and Barrier Properties of Poly(lactic acid). SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2016_17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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234
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Tajbakhsh S, Hajiali F. A comprehensive study on the fabrication and properties of biocomposites of poly(lactic acid)/ceramics for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:897-912. [DOI: 10.1016/j.msec.2016.09.008] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 08/27/2016] [Accepted: 09/06/2016] [Indexed: 12/22/2022]
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235
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Song P, Sang L, Zheng L, Wang C, Liu K, Wei Z. Insight into the role of bound water of a nucleating agent in polymer nucleation: a comparative study of anhydrous and monohydrated orotic acid on crystallization of poly(l-lactic acid). RSC Adv 2017. [DOI: 10.1039/c7ra02617j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The bound water of orotic acid and its dehydration transition play a negative role in nucleation effects on PLLA crystallization.
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Affiliation(s)
- Ping Song
- School of Materials Science and Engineering
- North University of China
- Taiyuan 030051
- China
| | - Lin Sang
- School of Automotive Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Liuchun Zheng
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Chao Wang
- School of Materials Science and Engineering
- North University of China
- Taiyuan 030051
- China
| | - Kankan Liu
- School of Chemical and Environmental Engineering
- North University of China
- Taiyuan 030051
- China
| | - Zhiyong Wei
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
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236
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Preparation and characterization of electrospun alginate/PLA nanofibers as tissue engineering material by emulsion eletrospinning. J Mech Behav Biomed Mater 2017; 65:428-438. [DOI: 10.1016/j.jmbbm.2016.09.012] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 09/06/2016] [Accepted: 09/07/2016] [Indexed: 12/15/2022]
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237
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Basu A, Nazarkovsky M, Ghadi R, Khan W, Domb AJ. Poly(lactic acid)-based nanocomposites. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3985] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Arijit Basu
- School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Jerusalem 91120 Israel
| | - Michael Nazarkovsky
- School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Jerusalem 91120 Israel
| | - Rohan Ghadi
- Department of Pharmaceutics; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad 500037 India
| | - Wahid Khan
- Department of Pharmaceutics; National Institute of Pharmaceutical Education and Research (NIPER); Hyderabad 500037 India
| | - Abraham J. Domb
- School of Pharmacy, Faculty of Medicine; The Hebrew University of Jerusalem; Jerusalem 91120 Israel
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238
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Supthanyakul R, Kaabbuathong N, Chirachanchai S. Random poly(butylene succinate-co-lactic acid) as a multi-functional additive for miscibility, toughness, and clarity of PLA/PBS blends. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.10.006] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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239
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240
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Liu M, Hong C, Li G, Ma P, Xie Y. The generation of myricetin-nicotinamide nanococrystals by top down and bottom up technologies. NANOTECHNOLOGY 2016; 27:395601. [PMID: 27535365 DOI: 10.1088/0957-4484/27/39/395601] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Myricetin-nicotinamide (MYR-NIC) nanococrystal preparation methods were developed and optimized using both top down and bottom up approaches. The grinding (top down) method successfully achieved nanococrystals, but there were some micrometer range particles and aggregation. The key consideration of the grinding technology was to control the milling time to determine a balance between the particle size and distribution. In contrast, a modified bottom up approach based on a solution method in conjunction with sonochemistry resulted in a uniform MYR-NIC nanococrystal that was confirmed by powder x-ray diffraction, scanning electron microscopy, dynamic light scattering, and differential scanning calorimeter, and the particle dissolution rate and amount were significantly greater than that of MYR-NIC cocrystal. Notably, this was a simple method without the addition of any non-solvent. We anticipate our findings will provide some guidance for future nanococrystal preparation as well as its application in both chemical and pharmaceutical area.
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Affiliation(s)
- Mingyu Liu
- Research Center for Health and Nutrition, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China. Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China
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241
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Development and characterisation of HPMC films containing PLA nanoparticles loaded with green tea extract for food packaging applications. Carbohydr Polym 2016; 156:108-117. [PMID: 27842804 DOI: 10.1016/j.carbpol.2016.08.094] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/12/2016] [Accepted: 06/27/2016] [Indexed: 11/24/2022]
Abstract
A novel active film material based on hydroxypropyl-methylcellulose (HPMC) containing poly(lactic acid) (PLA) nanoparticles (NPs) loaded with antioxidant (AO) green tea extract (GTE) was successfully developed. The PLA NPs were fabricated using an emulsification-solvent evaporation technique and the sizes were varied to enable a controlled release of the AO from the HPMC matrix. A statistical experimental design was used to optimise the synthesis of the NPs in order to obtain different sizes of nanoparticles and the loading of these into the HPMC matrix was also varied. The physico-chemical properties of the composite films were investigated and the release of the AO was confirmed by migration studies in 50% v/v ethanol/water food simulant. The AO capacity of the GTE released from the active films was studied using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical method and the results suggest that the material could potentially be used for extending the shelf-life of food products with high fat content.
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242
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Kowalonek J, Vuković-Kwiatkowska I, Moszyński D, Kaczmarek H. Surface properties of poly(lactic acid)/polyacrylate semi-interpenetrating networks – Effect of UVC radiation. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.07.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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243
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Klonos P, Terzopoulou Z, Koutsoumpis S, Zidropoulos S, Kripotou S, Papageorgiou GZ, Bikiaris DN, Kyritsis A, Pissis P. Rigid amorphous fraction and segmental dynamics in nanocomposites based on poly(l–lactic acid) and nano-inclusions of 1–3D geometry studied by thermal and dielectric techniques. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.07.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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244
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Loiola LMD, Fasce LA, da Silva LCE, Gonçalves MC, Frontini PM, Felisberti MI. Thermal and mechanical properties of nanocomposites based on a PLLA-b
-PEO-b
-PLLA triblock copolymer and nanohydroxyapatite. J Appl Polym Sci 2016. [DOI: 10.1002/app.44187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lívia M. D. Loiola
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
| | - Laura A. Fasce
- Universidad Nacional De Mar Del Plata, Instituto De Investigaciones En Ciencia Y Tecnología De Materiales; INTEMA, J.B. Justo 4302 - B7608 FDQ - Mar Del Plata Argentina
| | - Laura C. E. da Silva
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
| | - Maria C. Gonçalves
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
| | - Patricia M. Frontini
- Universidad Nacional De Mar Del Plata, Instituto De Investigaciones En Ciencia Y Tecnología De Materiales; INTEMA, J.B. Justo 4302 - B7608 FDQ - Mar Del Plata Argentina
| | - Maria I. Felisberti
- Institute of Chemistry, University of Campinas (UNICAMP); P.O. Box 6154, 13083-970 Campinas São Paulo Brazil
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247
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In-situ formation of silver nanoparticles on poly (lactic acid) film by γ-radiation induced grafting of N-vinyl pyrrolidone. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:142-9. [DOI: 10.1016/j.msec.2016.01.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 12/14/2015] [Accepted: 01/27/2016] [Indexed: 11/18/2022]
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248
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Lizundia E, Gómez-Galván F, Pérez-Álvarez L, León L, Vilas J. Poly(L-lactide)/branched β-cyclodextrin blends: Thermal, morphological and mechanical properties. Carbohydr Polym 2016; 144:25-32. [DOI: 10.1016/j.carbpol.2016.02.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/26/2016] [Accepted: 02/13/2016] [Indexed: 01/11/2023]
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249
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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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250
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Zhou L, Zhao G, Jiang W. Effects of Catalytic Transesterification and Composition on the Toughness of Poly(lactic acid)/Poly(propylene carbonate) Blends. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00315] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Linyao Zhou
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Guiyan Zhao
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Wei Jiang
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
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