1
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Mastalygina EE, Aleksanyan KV. Recent Approaches to the Plasticization of Poly(lactic Acid) (PLA) (A Review). Polymers (Basel) 2023; 16:87. [PMID: 38201752 PMCID: PMC10781029 DOI: 10.3390/polym16010087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
Poly(lactic acid) (PLA) is a polyester attracting growing interest every year in different application fields, such as packaging, cosmetics, food, medicine, etc. Despite its significant advantages, it has low elasticity that may hinder further development and a corresponding rise in volume of consumption. This review opens a discussion of basic approaches to PLA plasticization. These considerations include copolymerization and blending with flexible polymers, introducing oligomers and low-molecular additives, as well as structural modification. It was demonstrated that each approach has its advantages, such as simplicity and low cost, but with disadvantages, including complex processing and the need for additional reagents. According to the analysis of different approaches, it was concluded that the optimal option is the application of copolymers as the additives obtained via reactive mixing to PLA and its blends with other polymers.
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Affiliation(s)
- Elena E. Mastalygina
- Scientific Laboratory “Advanced Composite Materials and Technologies”, Plekhanov Russian University of Economics, 36 Stremyanny Ln., Moscow 117997, Russia
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., Moscow 119991, Russia
| | - Kristine V. Aleksanyan
- Engineering Center, Plekhanov Russian University of Economics, 36 Stremyanny Ln., Moscow 117997, Russia
- Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 4 Kosygin St, Moscow 119991, Russia
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2
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Meng Y, Zhai H, Zhou Z, Wang X, Han J, Feng W, Huang Y, Wang Y, Bai Y, Zhou J, Quan D. Three dimensional
printable multi‐arms poly(
CL‐
co
‐TOSUO
) for resilient biodegradable elastomer. JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1002/pol.20220700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Affiliation(s)
- Yue Meng
- GD HPPC and PCFM Lab, School of Chemistry Sun Yat‐sen University Guangzhou China
| | - Hong Zhai
- GD HPPC and PCFM Lab, School of Chemistry Sun Yat‐sen University Guangzhou China
| | - Ziting Zhou
- GD Functional Biomaterials Engineering Technology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
| | - Xiaoying Wang
- School of Biomedical Engineering Jinan University Guangzhou China
| | - Jiandong Han
- GD Functional Biomaterials Engineering Technology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
| | - WenJuan Feng
- GD HPPC and PCFM Lab, School of Chemistry Sun Yat‐sen University Guangzhou China
| | - Yuxin Huang
- GD HPPC and PCFM Lab, School of Chemistry Sun Yat‐sen University Guangzhou China
| | - Yuan Wang
- GD Functional Biomaterials Engineering Technology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
| | - Ying Bai
- GD Functional Biomaterials Engineering Technology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
| | - Jing Zhou
- GD Functional Biomaterials Engineering Technology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
| | - Daping Quan
- GD Functional Biomaterials Engineering Technology Research Center, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, School of Materials Science and Engineering Sun Yat‐sen University Guangzhou China
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3
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Sirisinha K, Wirasate S, Sirisinha C, Wattanakrai N. One-Pot Reactive Melt Recycling of PLA Post-Consumer Waste for the Production of Block Copolymer Nanocomposites of High Strength and Ductility. Polymers (Basel) 2022; 14:polym14173642. [PMID: 36080715 PMCID: PMC9459722 DOI: 10.3390/polym14173642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 08/26/2022] [Accepted: 08/30/2022] [Indexed: 12/23/2022] Open
Abstract
Post-consumer waste recycling is a crucial issue for building a sustainable society. However, mechanical recycling of poly(lactic acid) (PLA) often reduces the performance of the recycled material because PLA has a strong tendency to degrade during reprocessing. Therefore, it is of great interest to develop an effective recycling method to improve the mechanical performance of this material. This paper presents a one-pot melt process for turning PLA waste into a biodegradable block copolymer and its high strength and ductility composite. The process was conducted in a melt-mixer through a transesterification of PLA with poly(ethylene glycol) (PEG) or poly(propylene glycol) (PPG) as a soft component and clay as reinforcement. Effects of soft component content and sequence of clay addition on the mechanical performance of the prepared materials were focused. The results showed the successful preparation of PLA-based multiblock copolymers of high molecular weights (~100 kDa). Both virgin PLA and recycled source could serve as the starting material. PEG was more efficient than PPG in providing an intense improvement of PLA ductility. The nanocomposite of intercalated structure yielded nearly 100 times higher elongation at break (Eb = 506%) than the starting PLA (Eb = 5.6%) with high strength of 39.5 MPa and modulus of 1.4 GPa, considering the advantages of clay addition. Furthermore, the products with a broadened range of properties can be designed based on the ratio of PLA and soft component, as well as the organization and spatial distribution of clay in the copolymer matrices.
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Affiliation(s)
- Kalyanee Sirisinha
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
- Correspondence:
| | - Supa Wirasate
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Chakrit Sirisinha
- Rubber Technology Research Centre (RTEC), Faculty of Science, Mahidol University, Nakhon Prathom 73170, Thailand
| | - Noppasorn Wattanakrai
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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4
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Ponjavic M, Jevtic S, Nikolic MS. Multiblock copolymers containing poly(butylene succinate) and poly(ε-caprolactone) blocks: Effect of block ratio and length on physical properties and biodegradability. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03144-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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5
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Green Copolymers Based on Poly(Lactic Acid)-Short Review. MATERIALS 2021; 14:ma14185254. [PMID: 34576477 PMCID: PMC8469957 DOI: 10.3390/ma14185254] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/04/2021] [Accepted: 09/09/2021] [Indexed: 12/18/2022]
Abstract
Polylactic acid (PLA) is a biodegradable and biocompatible polymer that can be applied in the field of packaging and medicine. Its starting substrate is lactic acid and, on this account, PLA can also be considered an ecological material produced from renewable resources. Apart from several advantages, polylactic acid has drawbacks such as brittleness and relatively high glass transition and melting temperatures. However, copolymerization of PLA with other polymers improves PLA features, and a desirable material marked by preferable physical properties can be obtained. Presenting a detailed overview of the accounts on the PLA copolymerization accomplishments is the innovation of this paper. Scientific findings, examples of copolymers (including branched, star, grafted or block macromolecules), and its applications are discussed. As PLA copolymers can be potentially used in pharmaceutical and biomedical areas, the attention of this article is also placed on the advances present in this field of study. Moreover, the subject of PLA synthesis is described. Three methods are given: azeotropic dehydrative condensation, direct poly-condensation, and ring-opening polymerization (ROP), along with its mechanisms. The applied catalyst also has an impact on the end product and should be adequately selected depending on the intended use of the synthesized PLA. Different ways of using stannous octoate (Sn(Oct)2) and examples of the other inorganic and organic catalysts used in PLA synthesis are presented.
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6
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Oryan A, Hassanajili S, Sahvieh S, Azarpira N. Effectiveness of mesenchymal stem cell-seeded onto the 3D polylactic acid/polycaprolactone/hydroxyapatite scaffold on the radius bone defect in rat. Life Sci 2020; 257:118038. [PMID: 32622947 DOI: 10.1016/j.lfs.2020.118038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 06/24/2020] [Accepted: 06/29/2020] [Indexed: 12/22/2022]
Abstract
PURPOSE The importance of regeneration in large bone defects forces the orthopedic surgeons to search for a proper methodology. The present experiment evaluated the capability of polylactic acid/polycaprolactone/hydroxyapatite (PLA/PCL/HA) scaffold loaded with and without mesenchymal stem cells (MSCs) on bone regeneration. METHODS Fourier transform infrared spectrometry, X-ray diffraction, scanning electron microscopy, and rheology methodologies were used to characterize the scaffold. Forty Wistar rats were randomly divided into the four groups including the untreated defects as the control group and three other groups in which the bone defects were treated with autologous bones (autograft group), the PLA/PCL/HA scaffolds (PLA/PCL/HA group), and the MSCs-seeded scaffolds (MSCs-seeded PLA/PCL/HA group). RESULTS Based on the qRT-PCR results, significantly higher expression levels of osteocalcin, osteopontin, and CD31 were seen in the cell-seeded scaffold group compared to the control group (P < 0.05). The CT scanning and radiographic images depicted significantly more newly formed bonny tissue in the MSCs-loaded scaffold and autograft groups than the untreated group (P < 0.001). The immunohistochemistry, biomechanical, histopathologic, and histomorphometric evaluations demonstrated significantly improved regeneration in the autograft and MSCs-loaded scaffold groups compared to the non-treated group (P < 0.05). There were significant differences between the scaffold and untreated groups in all in vivo evaluations (P < 0.05). CONCLUSION The MSCs enhanced bone healing potential of the PLA/PCL/HA scaffold and the MSCs-seeded scaffold was comparable to the autograft as the golden treatment regimen (P > 0.05).
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Affiliation(s)
- A Oryan
- Department of Pathology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran.
| | - S Hassanajili
- Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
| | - S Sahvieh
- Department of Pathology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - N Azarpira
- Transplant Research Center, Department of Pathology, Shiraz University of Medical Sciences, Shiraz, Iran
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7
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Hassanajili S, Karami-Pour A, Oryan A, Talaei-Khozani T. Preparation and characterization of PLA/PCL/HA composite scaffolds using indirect 3D printing for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109960. [DOI: 10.1016/j.msec.2019.109960] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 06/27/2019] [Accepted: 07/05/2019] [Indexed: 12/15/2022]
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8
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Novel controllable degradation behavior and biocompatibility of segmented poly–ε–caprolactone in rats. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.01.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Tsuji H, Tamura KI, Arakawa Y. A versatile strategy for the synthesis and mechanical property manipulation of networked biodegradable polymeric materials composed of well-defined alternating hard and soft domains. RSC Adv 2019; 9:7094-7106. [PMID: 35519995 PMCID: PMC9062625 DOI: 10.1039/c9ra00255c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 02/15/2019] [Indexed: 12/29/2022] Open
Abstract
Networked materials composed of well-defined alternating domains of two types of biodegradable polymers, hard poly(l-lactide) and soft poly(ε-caprolactone), were successfully synthesized.
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Affiliation(s)
- Hideto Tsuji
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Ken-ichi Tamura
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
| | - Yuki Arakawa
- Department of Environmental and Life Sciences
- Graduate School of Engineering
- Toyohashi University of Technology
- Toyohashi
- Japan
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10
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Zhao N, Lv Z, Ma J, Zhu C, Li Q. Fabrication of hydrophilic small diameter vascular foam scaffolds of poly(ε-caprolactone)/polylactic blend by sodium hydroxide solution. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.11.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Jikei M, Kobayashi Y, Matsumoto K, Hirokawa M, Ueki S. Antiplatelet adhesion behavior of hyperbranched poly(l-lactide)s containing glutamic acid terminal groups. J Appl Polym Sci 2018. [DOI: 10.1002/app.46910] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mitsutoshi Jikei
- Department of Materials Engineering; Graduate School of Engineering Science, Akita University; 1-1, Tegatagakuen-machi, Akita-shi, Akita 010-8502 Japan
| | - Yuuki Kobayashi
- Department of Materials Engineering; Graduate School of Engineering Science, Akita University; 1-1, Tegatagakuen-machi, Akita-shi, Akita 010-8502 Japan
| | - Kazuya Matsumoto
- Department of Materials Engineering; Graduate School of Engineering Science, Akita University; 1-1, Tegatagakuen-machi, Akita-shi, Akita 010-8502 Japan
| | - Makoto Hirokawa
- Department of General Internal Medicine and Clinical Laboratory Medicine; Graduate School of Medicine, Akita University; 1-1-1, Hondo, Akita-shi, Akita 010-8543 Japan
| | - Shigeharu Ueki
- Department of General Internal Medicine and Clinical Laboratory Medicine; Graduate School of Medicine, Akita University; 1-1-1, Hondo, Akita-shi, Akita 010-8543 Japan
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12
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Ye H, Zhang K, Kai D, Li Z, Loh XJ. Polyester elastomers for soft tissue engineering. Chem Soc Rev 2018; 47:4545-4580. [PMID: 29722412 DOI: 10.1039/c8cs00161h] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polyester elastomers are soft, biodegradable and biocompatible and are commonly used in various biomedical applications, especially in tissue engineering. These synthetic polyesters can be easily fabricated using various techniques such as solvent casting, particle leaching, molding, electrospinning, 3-dimensional printing, photolithography, microablation etc. A large proportion of tissue engineering research efforts have focused on the use of allografts, decellularized animal scaffolds or other biological materials as scaffolds, but they face the major concern of triggering immunological responses from the host, on top of other issues. This review paper will introduce the recent developments in elastomeric polyesters, their synthesis and fabrication techniques, as well as their application in the biomedical field, focusing primarily on tissue engineering in ophthalmology, cardiac and vascular systems. Some of the commercial and near-commercial polyesters used in these tissue engineering fields will also be described.
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Affiliation(s)
- Hongye Ye
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
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13
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Largely improved mechanical properties of a biodegradable polyurethane elastomer via polylactide stereocomplexation. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.12.067] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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14
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Wu G, Wang H, Xiao J, Wang L, Ke Y, Fang L, Deng C, Liao H. Blocking of matrix metalloproteinases-13 responsive peptide in poly(urethane urea) for potential cartilage tissue engineering applications. J Biomater Appl 2018; 32:999-1010. [PMID: 29359624 DOI: 10.1177/0885328217753414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The matching of scaffold degradation rate with neotissue growth is required for tissue engineering applications. Timely provision of proper spaces especially for cartilage tissue engineering plays a pivotal role in chondrocyte cluster formation. In this study, poly(urethane urea) was synthesized using conventional two-stage method by extending the isocyanate group terminated prepolymers with different amounts of GPLGLWARK peptide, which responses the degrading induced by matrix metalloproteinase 13, the main proteinase for cartilage matrix degradation. The Fourier transform infrared spectrometer with the attenuated total reflection and 1H nuclear magnetic resonance spectra revealed that the peptides were introduced to poly(urethane urea) according to the characteristic absorption bands of the peptide and the newly formed urea bonds. The ultraviolet-visible spectroscopy spectra showed that the weight percentages of the peptide in the three poly(urethane urea) were 25%, 32%, and 35%. Atomic force microscopy images revealed that phase separation occurred in all poly(urethane urea) samples and became increasingly apparent with increasing amount of peptides introduced. Mechanical tests showed that the poly(urethane urea) strength increased with increasing amount of peptides in poly(urethane urea). Poly(urethane urea) proteolysis in matrix metalloproteinase 13 solution was more rapid than hydrolysis in aqueous buffer, and proteolysis rate was dependent on the amount of peptides in poly(urethane urea). Cell proliferation on the material surface in vitro displayed nontoxicity for all synthesized poly(urethane urea). In vivo subcutaneous implantation evaluation revealed the presence of local foreign body reactions triggered by poly(urethane urea) but was not due to peptide in poly(urethane urea). Moreover, the synthesized poly(urethane urea) with significant phase separation did not degrade under the matrix metalloproteinase 13 free subcutaneous environment, but poly(urethane urea) with minimal phase separation was degraded by attacking of the enzymes adsorbed on the hydrophobic surface through non-specific adsorption.
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Affiliation(s)
- Gang Wu
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China.,2 Department of Anatomy, Southern Medical University, PR China.,3 Department of Biomedical Engineering, Jinan University, PR China
| | - Huan Wang
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China
| | - Jiangwei Xiao
- 4 National Engineering Research Center for Tissue Restoration and Reconstruction, PR China
| | - Lilu Wang
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China
| | - Yu Ke
- 5 Guangdong Province Key Laboratory of Biomedical Engineering, PR China
| | - Liming Fang
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China.,2 Department of Anatomy, Southern Medical University, PR China
| | - Chunlin Deng
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China.,3 Department of Biomedical Engineering, Jinan University, PR China
| | - Hua Liao
- 4 National Engineering Research Center for Tissue Restoration and Reconstruction, PR China
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Jikei M, Yamadoi Y, Suga T, Matsumoto K. Stereocomplex formation of poly(l-lactide)-poly(ε-caprolactone) multiblock copolymers with Poly(d-lactide). POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Thermo-responsive alternating conetworks by the Diels-Alder reaction of furan-terminated 4-armed star-shaped ɛ-caprolactone oligomers and maleimide-terminated 4-armed star-shaped l-lactide oligomers. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Wu B, Zeng X, Wu L, Li BG. Nucleating agent-containing P(LLA-mb-BSA) multi-block copolymers with balanced mechanical properties. J Appl Polym Sci 2017. [DOI: 10.1002/app.44777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Binshuang Wu
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University; Hangzhou 310027 China
| | - Xiaoqing Zeng
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University; Hangzhou 310027 China
| | - Linbo Wu
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University; Hangzhou 310027 China
| | - Bo-Geng Li
- State Key Laboratory of Chemical Engineering, College of Chemical & Biological Engineering, Zhejiang University; Hangzhou 310027 China
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18
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Jikei M, Suga T, Yamadoi Y, Matsumoto K. Synthesis and properties of poly(L-lactide-co-glycolide)-b-Poly(ɛ-caprolactone) multiblock copolymers formed by self-polycondensation of diblock macromonomers. Polym J 2017. [DOI: 10.1038/pj.2016.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Phase Separation and Elastic Properties of Poly(Trimethylene Terephthalate)-block-poly(Ethylene Oxide) Copolymers. Polymers (Basel) 2016; 8:polym8070237. [PMID: 30974518 PMCID: PMC6432139 DOI: 10.3390/polym8070237] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/09/2016] [Accepted: 06/14/2016] [Indexed: 11/17/2022] Open
Abstract
A series of poly(trimethylene terephthalate)-block-poly(ethylene oxide) (PTT-b-PEOT) copolymers with different compositions of rigid PTT and flexible PEOT segments were synthesized via condensation in the melt. The influence of the block length and the block ratio on the micro-separated phase structure and elastic properties of the synthesized multiblock copolymers was studied. The PEOT segments in these copolymers were kept constant at 1130, 2130 or 3130 g/mol, whereas the PTT content varied from 30 up to 50 wt %. The phase separation was assessed using differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). The crystal structure of the synthesised block copolymers and their microstructure on the manometer scale was evaluated by using WAXS and SAXS analysis. Depending on the PTT/PEOT ratio, but also on the rigid and flexible segment length in PTT-b-PEO copolymers, four different domains were observed i.e.,: a crystalline PTT phase, a crystalline PEO phase (which exists for the whole series based on three types of PEOT segments), an amorphous PTT phase (only at 50 wt % content of PTT rigid segments) and an amorphous PEO phase. Moreover, the elastic deformability and reversibility of PTT-b-PEOT block copolymers were studied during a cyclic tensile test. Determined values of permanent set resultant from maximum attained stain (100% and 200%) for copolymers were used to evaluate their elastic properties.
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20
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Zhao H, Zhao G. Mechanical and thermal properties of conventional and microcellular injection molded poly (lactic acid)/poly (ε-caprolactone) blends. J Mech Behav Biomed Mater 2016; 53:59-67. [DOI: 10.1016/j.jmbbm.2015.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 08/01/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
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21
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Conetworks composed of 4-armed star-shaped l-lactide oligomer and 4-armed star-shaped ɛ-caprolactone oligomer. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.07.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Jikei M, Takeyama Y, Yamadoi Y, Shinbo N, Matsumoto K, Motokawa M, Ishibashi K, Yamamoto F. Synthesis and properties of Poly(L-lactide)-Poly(ɛ-caprolactone) multiblock copolymers by the self-polycondensation of diblock macromonomers. Polym J 2015. [DOI: 10.1038/pj.2015.49] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Harmansyah F, Woo EM, Lee LT, Chien HR. Distorted ring-banded spherulites in poly(l-lactic acid)/poly(ε-caprolactone) blends. RSC Adv 2014. [DOI: 10.1039/c4ra08658a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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24
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Ning Z, Jiang N, Gan Z. Four-armed PCL-b-PDLA diblock copolymer: 1. Synthesis, crystallization and degradation. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2014.05.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Shin J, Kim YW, Kim GJ. Sustainable Block Copolymer-based Thermoplastic Elastomers. APPLIED CHEMISTRY FOR ENGINEERING 2014. [DOI: 10.14478/ace.2014-1025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Yang JE, Choi SY, Shin JH, Park SJ, Lee SY. Microbial production of lactate-containing polyesters. Microb Biotechnol 2013; 6:621-36. [PMID: 23718266 PMCID: PMC3815930 DOI: 10.1111/1751-7915.12066] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 04/19/2013] [Accepted: 04/22/2013] [Indexed: 12/31/2022] Open
Abstract
Due to our increasing concerns on environmental problems and limited fossil resources, biobased production of chemicals and materials through biorefinery has been attracting much attention. Optimization of the metabolic performance of microorganisms, the key biocatalysts for the efficient production of the desired target bioproducts, has been achieved by metabolic engineering. Metabolic engineering allowed more efficient production of polyhydroxyalkanoates, a family of microbial polyesters. More recently, non-natural polyesters containing lactate as a monomer have also been produced by one-step fermentation of engineered bacteria. Systems metabolic engineering integrating traditional metabolic engineering with systems biology, synthetic biology, protein/enzyme engineering through directed evolution and structural design, and evolutionary engineering, enabled microorganisms to efficiently produce natural and non-natural products. Here, we review the strategies for the metabolic engineering of microorganisms for the in vivo biosynthesis of lactate-containing polyesters and for the optimization of whole cell metabolism to efficiently produce lactate-containing polyesters. Also, major problems to be solved to further enhance the production of lactate-containing polyesters are discussed.
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Affiliation(s)
- Jung Eun Yang
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Program), Center for Systems and Synthetic Biotechnology, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
- Institute for the BioCentury, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - So Young Choi
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Program), Center for Systems and Synthetic Biotechnology, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
- Institute for the BioCentury, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Jae Ho Shin
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Program), Center for Systems and Synthetic Biotechnology, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
- Institute for the BioCentury, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| | - Si Jae Park
- Department of Environmental Engineering and Energy (Undergraduate program), Myongji UniversitySan 38-2, Nam-dong, Cheoin-gu, Yongin-si, Gyeonggido, 449-728, Korea
- Department of Energy Science and Technology (Graduate program), Myongji UniversitySan 38-2, Nam-dong, Cheoin-gu, Yongin-si, Gyeonggido, 449-728, Korea
| | - Sang Yup Lee
- Metabolic and Biomolecular Engineering National Research Laboratory, Department of Chemical and Biomolecular Engineering (BK21 Program), Center for Systems and Synthetic Biotechnology, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
- Institute for the BioCentury, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
- Department of Bio and Brain Engineering, Department of Biological Sciences, BioProcess Engineering Research Center, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
- Bioinformatics Research Center, KAIST291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
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27
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Liu M, Cheng Z, Jin Y, Ru X, Ding D, Li J. Optimization and investigation of the governing parameters in electrospinning the home-made poly(l-lactide-co-ε-caprolactone-diOH). J Appl Polym Sci 2013. [DOI: 10.1002/app.39592] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mengzhu Liu
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | | | - Yi Jin
- China Criminal Police University; Shenyang; 110035; People's Republic of China
| | - Xin Ru
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Dawei Ding
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Junfeng Li
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
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28
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Zheng L, Wang Z, Wu S, Li C, Zhang D, Xiao Y. Novel Poly(butylene fumarate) and Poly(butylene succinate) Multiblock Copolymers Bearing Reactive Carbon–Carbon Double Bonds: Synthesis, Characterization, Cocrystallization, and Properties. Ind Eng Chem Res 2013. [DOI: 10.1021/ie303573d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Liuchun Zheng
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Zhaodong Wang
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
- Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Shaohua Wu
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
- Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chuncheng Li
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Dong Zhang
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Yaonan Xiao
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
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29
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Wang J, Zheng L, Li C, Zhu W, Zhang D, Guan G, Xiao Y. Synthesis and properties of biodegradable multiblock poly(ester-carbonate) comprising of poly(L-lactic acid) and poly(butylene carbonate) with hexamethylene diisocyanate as chain-extender. J Appl Polym Sci 2013. [DOI: 10.1002/app.39158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jin Wang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
- Key Laboratory of Tobacco Chemistry of Yunnan Province; Yunnan Academy of Tobacco Sciences; Kunming 650106 People's Republic of China
| | - Liuchun Zheng
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
| | - Chuncheng Li
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
| | - Wenxiang Zhu
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
| | - Dong Zhang
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
| | - Guohu Guan
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
| | - Yaonan Xiao
- Beijing National Laboratory for Molecular Sciences; Key Laboratory of Engineering Plastics; Institute of Chemistry; Chinese Academy of Sciences (ICCAS); Beijing 100190 People's Republic of China
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30
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Yoo YC, Kim HY, Jin FL, Park SJ. Synthesis of poly(glycolide-caprolactone) copolymers for application as bioabsorbable suture materials. Macromol Res 2013. [DOI: 10.1007/s13233-013-1071-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Yoo YC, Kim HY, Jin FL, Park SJ. In-vitro and in-vivo Behaviors of Poly(glycolide-caprolactone) Copolymer for Bioabsorbable Suture Materials. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.12.4137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Zheng L, Wang Z, Li C, Zhang D, Xiao Y. Novel Unsaturated Aliphatic Polyesters: Synthesis, Characterization, and Properties of Multiblock Copolymers Composing of Poly(Butylene Fumarate) and Poly(1,2-Propylene Succinate). Ind Eng Chem Res 2012. [DOI: 10.1021/ie301994z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liuchun Zheng
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Zhaodong Wang
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
- Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Chuncheng Li
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Dong Zhang
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Yaonan Xiao
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
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33
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Diao H, Si Y, Zhu A, Ji L, Shi H. Surface modified nano-hydroxyapatite/poly(lactide acid) composite and its osteocyte compatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1796-1801. [DOI: 10.1016/j.msec.2012.04.065] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 04/02/2012] [Accepted: 04/24/2012] [Indexed: 11/25/2022]
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34
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RETRACTED ARTICLE Recent progress in AFM studies of biodegradable poly(lactic acid) materials. CHINESE SCIENCE BULLETIN-CHINESE 2012. [DOI: 10.1007/s11434-012-5052-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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35
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Wang J, Zheng L, Li C, Zhu W, Zhang D, Guan G, Xiao Y. Synthesis and Properties of Biodegradable Poly(ester-co-carbonate) Multiblock Copolymers Comprising of Poly(butylene Succinate) and Poly(butylene Carbonate) by Chain Extension. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300547g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jin Wang
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
- Graduate University of the Chinese Academy of Academy of Sciences, Beijing
100049, People’s Republic of China
| | - Liuchun Zheng
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
| | - Chuncheng Li
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
| | - Wenxiang Zhu
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
| | - Dong Zhang
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
| | - Guohu Guan
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
| | - Yaonan Xiao
- Beijing National
Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering
Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s
Republic of China
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36
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Zheng L, Li C, Wang Z, Wang J, Xiao Y, Zhang D, Guan G. Novel Biodegradable and Double Crystalline Multiblock Copolymers Comprising of Poly(butylene succinate) and Poly(ε-caprolactone): Synthesis, Characterization, and Properties. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300576z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Liuchun Zheng
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Chuncheng Li
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Zhaodong Wang
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
- Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Jin Wang
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
- Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Yaonan Xiao
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Dong Zhang
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
| | - Guohu Guan
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute
of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing 100190, P. R. China
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37
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Liu Q, Jiang L, Shi R, Zhang L. Synthesis, preparation, in vitro degradation, and application of novel degradable bioelastomers—A review. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2011.11.001] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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38
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Auliawan A, Woo EM. Crystallization kinetics and degradation of nanocomposites based on ternary blend of poly(L-lactic acid), poly(methyl methacrylate), and poly(ethylene oxide) with two different organoclays. J Appl Polym Sci 2012. [DOI: 10.1002/app.36761] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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39
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Zeng C, Zhang NW, Ren J. Synthesis and properties of bio-based thermoplastic polyurethane based on poly (L-lactic acid) copolymer polydiol. J Appl Polym Sci 2012. [DOI: 10.1002/app.36283] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Effect Addition of Octadecylamine Modified Clay (ODA-MMT) to Polylactide/Polycaprolactone (PLA/PCL) Blend. ACTA ACUST UNITED AC 2011. [DOI: 10.4028/www.scientific.net/amr.364.317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, Octadecylamine Modified montmorillonites (ODAMMT) were used to prepare polylactide/polycaprolactone (PLA/PCL) clay nanocomposites. PLA and PCL were blend using an internal mixer by melt blending method. The other sample was blend with natrium monmorillonite (NaMMT) and Octadecylamine modified monmorillonite to produce PLA/PCL-NaMMT and PLA/PCL-ODAMMT. To characterize the polymer nanocomposite, X-ray diffraction (XRD), FTIR and SEM analysis were conducted. Comparison of morphology were made up between neat PLA/PCL, PLA/PCL with presence of of montmorillonite and octadecylamine modified monmorillonite respectively based on SEM micrograph. The number-average diameter was calculated for PLA/PCL, PLA/PCL-NaMMT, and PLA/PCL-ODAMMT.
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41
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Lahiri D, Rouzaud F, Richard T, Keshri AK, Bakshi SR, Kos L, Agarwal A. Boron nitride nanotube reinforced polylactide-polycaprolactone copolymer composite: mechanical properties and cytocompatibility with osteoblasts and macrophages in vitro. Acta Biomater 2010; 6:3524-33. [PMID: 20226282 DOI: 10.1016/j.actbio.2010.02.044] [Citation(s) in RCA: 157] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Revised: 02/22/2010] [Accepted: 02/24/2010] [Indexed: 12/12/2022]
Abstract
Biodegradable polylactide-polycaprolactone copolymer (PLC) has been reinforced with 0, 2 and 5wt.% boron nitride nanotubes (BNNTs) for orthopedic scaffold application. Elastic modulus of the PLC-5wt.% BNNT composite, evaluated through nanoindentation technique, shows a 1370% increase. The same amount of BNNT addition to PLC enhances the tensile strength by 109%, without any adverse effect on the ductility up to 240% elongation. Interactions of the osteoblasts and macrophages with bare BNNTs prove them to be non-cytotoxic. PLC-BNNT composites displayed increased osteoblast cell viability as compared to the PLC matrix. The addition of BNNTs also resulted in an increase in the expression levels of the Runx2 gene, the main regulator of osteoblast differentiation. These results indicate that BNNT is a potential reinforcement for composites for orthopedic applications.
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42
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Bonakdar S, Emami SH, Shokrgozar MA, Farhadi A, Ahmadi SAH, Amanzadeh A. Preparation and characterization of polyvinyl alcohol hydrogels crosslinked by biodegradable polyurethane for tissue engineering of cartilage. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2010.02.017] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Lahiri D, Rouzaud F, Namin S, Keshri AK, Valdés JJ, Kos L, Tsoukias N, Agarwal A. Carbon nanotube reinforced polylactide-caprolactone copolymer: mechanical strengthening and interaction with human osteoblasts in vitro. ACS APPLIED MATERIALS & INTERFACES 2009; 1:2470-2476. [PMID: 20356116 DOI: 10.1021/am900423q] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study proposes the use of carbon nanotubes (CNTs) as reinforcement to enhance the mechanical properties of a polylactide-caprolactone copolymer (PLC) matrix. Biological interaction of PLC-CNT composites with human osteoblast cells is also investigated. Addition of 2 wt % CNT shows very uniform dispersion in the copolymer matrix, whereas 5 wt % CNT shows severe agglomeration and high porosity. PLC-2 wt % CNT composite shows an improvement in the mechanical properties with an increase in the elastic modulus by 100% and tensile strength by 160%, without any adverse effect on the ductility up to 240% elongation. An in vitro biocompatibility study on the composites shows an increase in the viability of human osteoblast cells compared to the PLC matrix, which is attributed to the combined effect of CNT content and surface roughness of the composite films.
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Affiliation(s)
- D Lahiri
- Mechanical and Materials Engineering, Biological Sciences, and Biomedical Engineering, Florida International University, Miami, Florida 33174, USA
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