1
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Chen E, Turng LS. A Double-Expanded Polytetrafluoroethylene Fabrication Method for Increased Mechanical Compliance in Tubular Vascular Graft Applications. POLYM ENG SCI 2024; 64:1756-1769. [PMID: 39184016 PMCID: PMC11343504 DOI: 10.1002/pen.26652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 01/21/2024] [Indexed: 08/27/2024]
Abstract
A novel manufacturing technique has been developed to enhance the compliance of expanded polytetrafluoroethylene (ePTFE) for vascular graft applications. This new method involves modifying the existing processing procedures by introducing an additional expansion step while using a lower temperature during the first expansion stage. The new process results in the production of highly compliant ePTFE grafts without the need for supplementary additives or inherent material alterations. Tensile testing in both the longitudinal and circumferential directions as well as cyclical tensile testing were conducted to characterize the mechanical properties of double-expanded ePTFE grafts prepared using varying expansion ratios. The double-expanded ePTFE grafts consistently outperformed the prevailing, single-expanded counterparts in both tensile stress tests and cyclical assessments of its elastic compliance. Notably, the double-expanded ePTFE samples exhibited the desirable, biomimetic "toe-region" and an elastic strain capacity of up to 50%, comparable to native vascular materials. Scanning electron microscopy (SEM) imaging was used to examine the morphological characteristics of the wavy fibers within the double-expanded PTFE samples, which contributed to the enhanced compliance that is needed for vascular graft applications.
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Affiliation(s)
- Edward Chen
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, WI 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, Madison, WI 53715, USA
| | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin–Madison, Madison, WI 53706, USA
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, Madison, WI 53715, USA
- Department of Mechanical Engineering, Chang Gung University, Tao-Yuan 33302, Taiwan
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2
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Ma C, Zhang Y, Zhao Z, Wang J, Chen Y, Qian L, Fang Z, Song R, Song P. Green synthesis of bio-based flame retardant/natural rubber inorganic-organic hybrid and its flame retarding and toughening effect for polylactic acid. Int J Biol Macromol 2024; 256:128378. [PMID: 38000569 DOI: 10.1016/j.ijbiomac.2023.128378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 11/03/2023] [Accepted: 11/21/2023] [Indexed: 11/26/2023]
Abstract
Polylactic acid (PLA) has garnered significant interest as a bio-based polymer due to its favorable thermal and processing characteristics, as well as its notable economic and environmental benefits. However, the drawbacks such as flammability and poor toughness of PLA severely constrained its applications in more fields. Here, based on the outstanding flame-retardant properties of core-shell flame retardant (CSFR) and the toughening potential of natural rubber (NR), we synthesized inorganic-organic hybrid of CSFR-NR using an aqueous synthesis to synchronous optimization of the comprehensive performance of PLA. The as-prepared CSFR-NR with "hard core and soft shell" possess the ability to promote char formation and facilitate uniform dispersion in the PLA matrix. Consequently, the PLA/CSFR-NR showed an excellent flame retardancy with the limiting oxygen index (LOI) value of 31.5 % and UL-94 V-0 rating and synergistic toughening effect with absolutely improvement in elongation at break and notched izod impact strength, achieving a balance between the fire safety and mechanical performance. Moreover, the degradation rate of PLA has also been substantially promoted by CSFR-NR in simulated seawater. Hence, this study offers a straightforward, efficient, and environmentally friendly strategy for creating high-performance flame retardant and toughened bioplastics.
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Affiliation(s)
- Changchang Ma
- Laboratory of Polymer Materials and Engineering, NingboTech University, Ningbo 315100, China
| | - Yan Zhang
- Laboratory of Polymer Materials and Engineering, NingboTech University, Ningbo 315100, China.
| | - Zhinuo Zhao
- Laboratory of Polymer Materials and Engineering, NingboTech University, Ningbo 315100, China
| | - Jiawen Wang
- Laboratory of Polymer Materials and Engineering, NingboTech University, Ningbo 315100, China
| | - Yajun Chen
- School of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China.
| | - Lijun Qian
- School of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Zhengping Fang
- Laboratory of Polymer Materials and Engineering, NingboTech University, Ningbo 315100, China
| | - Ruiyin Song
- Laboratory of Polymer Materials and Engineering, NingboTech University, Ningbo 315100, China; Zhejiang Engineering Research Center for Intelligent Marine Ranch Equipment, Ningbo 315100, China
| | - Pingan Song
- Centre for Future Materials, University of Southern Queensland, Springfield Central 4300, Australia; School of Agriculture and Environmental Science, University of Southern Queensland, Springfield 4300, Australia
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3
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Wei X, Meng R, Bai Y, Liu W, Zhou H, Wang X, Xu B. Hydrophobic and oleophilic open-cell foams from in-situ microfibrillation blends of poly(lactic acid) and polytetrafluoroethylene: Selective oil-adsorption behaviors. Int J Biol Macromol 2023; 227:273-284. [PMID: 36549028 DOI: 10.1016/j.ijbiomac.2022.12.196] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/09/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Confronted with severe water contamination induced by the spillage of oils, seeking oil-selective adsorbent to recover oil from oily wastewater is extremely urgent. In particular, the functionalized polymer foams with open-cell structures are highly promising oil-selective adsorbent. Herein, a simple, effective and green method was presented to prepare open-cell poly(lactic acid) (PLA)/polytetrafluoroethylene (PTFE) foams with selective oil-adsorption behaviors via melt blending and supercritical CO2 batch foaming technique. The introduction of PTFE had a distinct positive influence on the melt viscoelasticity and crystallization performances of various PLA specimens. The resulted PLA/PTFE4 foam with a volume expansion ratio of 10.17 ± 0.93 and a cell density of 1.58 × 108 cells/cm3 possessed the highest open-cell content of 90.81 ± 0.78 %. Meanwhile, PLA/PTFE4 foam revealed oil/water selective adsorption capacity of 1.2-6.1 g/g for various organic solvents and oils. The adsorption capacity of PLA/PTFE4 foam for CCl4 exhibited no significant decrement during ten adsorption-desorption cycles. This research offered a guideline for the manufacture of green environmental open-cell polymer foams for oil-selective adsorption.
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Affiliation(s)
- Xinyi Wei
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Ruijing Meng
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Yu'an Bai
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Wei Liu
- School of Materials and Energy Engineering, Guizhou Institute of Technology, Guiyang 550003, People's Republic of China
| | - Hongfu Zhou
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
| | - Xiangdong Wang
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Bo Xu
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
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4
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The synergistic effect of polytetrafluoroethylene in-situ fibrillation and dibenzoyl sebacate hydrazide on the crystallization and foaming behavior of poly (lactic acid). Int J Biol Macromol 2022; 221:523-535. [PMID: 36089093 DOI: 10.1016/j.ijbiomac.2022.09.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/03/2022] [Accepted: 09/05/2022] [Indexed: 11/22/2022]
Abstract
The fully degradable poly (lactic acid) foam with green environmental protection characteristics can alleviate the shortage of petroleum resources caused by the application of plastics. However, due to the inherent low melt strength and slow crystallization rate of linear PLA. It is difficult to obtain PLA microcellular foam with good morphology. In order to obtain PLA microcellular foam with ultra-high expansion ratio and small cell size, PTFE (polytetrafluoroethylene) nanofibers with excellent CO2 adsorption rate were introduced. Self-assembled nucleator TMC-300(dibenzoyl sebacate hydrazide) was also introduced to blend with PLA to obtain small-sized cells. The results show that the PTFE entanglement network as a self-assembled template can effectively improve the early crystallization nucleation efficiency and increase the crystallinity of branched PLA (CBPLA)/TMC by 7 %. The microcellular foam with PTFE content of 0.5 wt% (CBPLA/TMC/PTFE 0.5) was successfully prepared by physical foaming agent, which had the lowest cell size (8.7 μm) And high expansion ratio (1200 %).
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5
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Wang L, Zheng L, Zhou L, Shi M, Bi Z, Wang C, Wang D, Li Q. The distribution of electrospun polylactic acid in polycaprolactone matrix controlled by traction rate and its effect on the foamed porous tissue engineering scaffolds. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lixia Wang
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Lun Zheng
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Lu Zhou
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Miaolei Shi
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Zhaojie Bi
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Chen Wang
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Dongfang Wang
- School of Mechanics and Safety Engineering Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Qian Li
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
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6
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Chai J, Wang G, Zhang A, Dong G, Li S, Zhao J, Zhao G. Microcellular injection molded lightweight and tough poly (L-lactic acid)/in-situ polytetrafluoroethylene nanocomposite foams with enhanced surface quality and thermally-insulating performance. Int J Biol Macromol 2022; 215:57-66. [PMID: 35718146 DOI: 10.1016/j.ijbiomac.2022.06.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/11/2022] [Accepted: 06/11/2022] [Indexed: 01/13/2023]
Abstract
High-performance microcellular polymer foams have been widely used all over the world, while the excessive usage of petroleum-based polymers caused serious environmental problems. As the eco-friendly awareness is increasing significantly, poly (L-lactic acid) (PLLA), as a typical biomass polymer, has gradually attracted widespread attention. However, the slow crystallization and poor melt strength of PLLA lead to low foaming ability and thus limiting its industrial applications. Herein, a novel and scalable strategy by coupling in-situ fibrillation and mold-opening microcellular injection molding (MOMIM) was developed to fabricate lightweight and tough PLLA/polytetrafluoroethylene (PTFE) foams. Thanks to the reticulated in-situ PTFE nanofibrils with a diameter of 100-200 nm, the crystallization and viscoelasticity of PLLA were dramatically promoted, and further contributing to its foaming ability. The expansion ratio of the MOMIM PLLA/PTFE foam was increased by 86 % compared with the regular microcellular injection molded (RMIM) PLLA foam. Moreover, the lower foam density and the toughening effect of PTFE nanofibrils resulted in the outstanding ductility of the PLLA/PTFE foams, whose tensile elongation, flexural strength, and impact strength were maximally increased by 52 %, 28 %, and 48 %, compared with PLLA foams. More importantly, the thermally-insulating performance and surface quality of PLLA/PTFE foams were also greatly improved.
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Affiliation(s)
- Jialong Chai
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China
| | - Guilong Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China; School of Mechanical & Vehicle Engineering, Linyi University, Linyi, Shandong 276005, China.
| | - Aimin Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China
| | - Guiwei Dong
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
| | - Shuai Li
- School of Mechanical & Vehicle Engineering, Linyi University, Linyi, Shandong 276005, China
| | - Jinchuan Zhao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China.
| | - Guoqun Zhao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, China
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7
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Wei X, Luo J, Wang X, Zhou H, Pang Y. ScCO 2-assisted fabrication and compressive property of poly (lactic acid) foam reinforced by in-situ polytetrafluoroethylene fibrils. Int J Biol Macromol 2022; 209:2050-2060. [PMID: 35490769 DOI: 10.1016/j.ijbiomac.2022.04.186] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/14/2022] [Accepted: 04/25/2022] [Indexed: 01/17/2023]
Abstract
As an effective alternative for petrochemical-based polymers, bio-based poly (lactic acid) (PLA) foam has been anticipated to alleviate enormous environmental pollution caused by microplastics. However, some difficulties involved in PLA foaming process due to the inherently poor melt strength and crystallization properties. In this context, a small amount of polytetrafluoroethylene (PTFE) was incorporated into PLA matrix to solve the aforementioned issues. Scanning electron microscopy measurement exhibited that PTFE fibrils and their physical networks were formed in molten PLA after blending. Due to these PTFE networks, approximately 2 orders of magnitudes increment in the storage modulus and more than 20% improvement in crystallinity of PLA were obtained. Diverse PLA samples were successfully foamed by a cost-effective, green and supercritical CO2-assisted foaming method. The PLA/PTFE foam with the PTFE content of 5 wt% (PLA/PTFE5) possessed the smallest pore size (9.51 μm) and the highest pore density (2.60 × 108 pores/cm3). In addition, the average specific compressive strength of PLA/PTFE5 foam was enhanced 30% in comparison with that of pure PLA foam. Overall, this study could provide a prospective strategy for developing bioderived and biodegradable polymer foams with controllable pore structures and high compression property.
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Affiliation(s)
- Xinyi Wei
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Jingyun Luo
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Xiangdong Wang
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China
| | - Hongfu Zhou
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
| | - Yongyan Pang
- Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, People's Republic of China.
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8
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A facile strategy for preparation of strong tough poly(lactic acid) foam with a unique microfibrillated bimodal micro/nano cellular structure. Int J Biol Macromol 2022; 199:264-274. [PMID: 34999040 DOI: 10.1016/j.ijbiomac.2021.12.187] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/12/2021] [Accepted: 12/29/2021] [Indexed: 12/13/2022]
Abstract
This work reports the design and fabrication of strong tough poly(lactic acid) (PLA) foam by combining pressure-induced-flow (PIF) processing with supercritical CO2 foaming. PIF processing widened the foaming window of PLA to 40-120 °C, while supercritical CO2 foaming released the undesired internal stress of PLA samples with PIF processing (P-PLA). The prepared PLA foams displayed a unique microfibrillated bimodal micro/nano cellular structure which is strongly affected by saturation temperature (Ts). Both micron and nano cells showed decreasing cells size and increasing cell density as Ts elevated. The orientation factor as well as internal stress of PLA foams decreased with increased Ts. Compared with P-PLA samples, PLA foam prepared at Ts of 40 °C showed negligible reduction of orientation from 0.45 to 0.41 and release of internal stress characterized by the rightward shift of Raman peak (stretching vibration of CO bond from 1763 to 1766 cm-1). Furthermore, PLA foam prepared at Ts of 40 °C presented excellent impact strength (32.3 kJ/m2), tensile strength (42.0 MPa), and ductility (14.2%). The combination of PIF processing and supercritical CO2 foaming provides a facile and effective method to prepare strong tough PLA foam that has immense potential in biomedical, aerospace, automotive, and other structural applications.
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9
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Wu G, Song R, Ma Y, Xie J, Yang W, Xie P. Polypropylene‐based
in situ
fibrillation‐reinforced
ternary composite foams with improved
filler‐phase
dispersion. POLYM ENG SCI 2022. [DOI: 10.1002/pen.25848] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Gaojian Wu
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Renda Song
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Yitao Ma
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Jinzhao Xie
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
| | - Weimin Yang
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing China
| | - Pengcheng Xie
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing China
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing China
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10
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Han S, Jiang C, Mi J, Wang Y, Chen S, Wang X. Influence of fibrillated poly(tetrafluoroethylene) on microcellular foaming of polyamide 6 in the presence of supercritical
CO
2
. J Appl Polym Sci 2021. [DOI: 10.1002/app.51258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Shuo Han
- School of Chemistry and Materials Engineering Beijing Technology and Business University Beijing China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing China
| | - Can Jiang
- School of Chemistry and Materials Engineering Beijing Technology and Business University Beijing China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing China
| | - Jianguo Mi
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing China
| | - Yaqiao Wang
- College of Materials Science and Engineering Beijing University of Chemical Technology Beijing China
| | - Shihong Chen
- School of Chemistry and Materials Engineering Beijing Technology and Business University Beijing China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing China
| | - Xiangdong Wang
- School of Chemistry and Materials Engineering Beijing Technology and Business University Beijing China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing China
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11
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Schmidt GA, Lin Y, Xu Y, Wang D, Yilmaz G, Turng L. Viscosity characterization and flow simulation and visualization of polytetrafluoroethylene paste extrusion using a green and biofriendly lubricant. POLYM ENG SCI 2021; 61:1050-1065. [DOI: 10.1002/pen.25632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- George A. Schmidt
- Polymer Engineering Center, Department of Mechanical Engineering University of Wisconsin–Madison Madison Wisconsin USA
- Wisconsin Institute for Discovery University of Wisconsin–Madison Madison Wisconsin USA
| | - Yu‐Jyun Lin
- Polymer Engineering Center, Department of Mechanical Engineering University of Wisconsin–Madison Madison Wisconsin USA
- Wisconsin Institute for Discovery University of Wisconsin–Madison Madison Wisconsin USA
| | - Yiyang Xu
- Polymer Engineering Center, Department of Mechanical Engineering University of Wisconsin–Madison Madison Wisconsin USA
- Wisconsin Institute for Discovery University of Wisconsin–Madison Madison Wisconsin USA
| | - Dongfang Wang
- Polymer Engineering Center, Department of Mechanical Engineering University of Wisconsin–Madison Madison Wisconsin USA
- Wisconsin Institute for Discovery University of Wisconsin–Madison Madison Wisconsin USA
- School of Mechanics and Engineering Science Zhengzhou University Zhengzhou China
- National Center for International Research of Micro‐Nano Molding Technology Zhengzhou University Zhengzhou China
| | - Galip Yilmaz
- Polymer Engineering Center, Department of Mechanical Engineering University of Wisconsin–Madison Madison Wisconsin USA
- Wisconsin Institute for Discovery University of Wisconsin–Madison Madison Wisconsin USA
| | - Lih‐Sheng Turng
- Polymer Engineering Center, Department of Mechanical Engineering University of Wisconsin–Madison Madison Wisconsin USA
- Wisconsin Institute for Discovery University of Wisconsin–Madison Madison Wisconsin USA
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12
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The effect of polytetrafluoroethylene particle size on the properties of biodegradable poly(butylene succinate)-based composites. Sci Rep 2021; 11:6802. [PMID: 33762666 PMCID: PMC7991650 DOI: 10.1038/s41598-021-86307-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/09/2021] [Indexed: 11/09/2022] Open
Abstract
Poly(butylene succinate) (PBS)/polytetrafluoroethylene (PTFE) composites, including three types of PTFE powders, were prepared by melt blending using a HAAKE torque rheometer. Microcellular foams were successfully fabricated by batch foaming with supercritical fluids (scCO2). The effects of PTFE powder type on crystallization, rheological properties and foaming behavior were studied. PTFE L-5 and PTFE JH-220 powders showed good dispersion in the PBS matrix, and PTFE FA-500 powder underwent fibrillation during the melt blending process. All three PTFE powders gradually increased the crystallization temperature of PBS from 78.2 to 91.8 ℃ and the crystallinity from 45.6 to 61.7% without apparent changes in the crystal structure. Rheological results revealed that PBS/PTFE composites had a higher storage modulus, loss modulus, and complex viscosity than those of pure PBS. In particular, the complex viscosity of the PBS/P500 composite increased by an order of magnitude in the low-frequency region. The foamed structure of PBS was obviously improved by adding PTFE powder, and the effect of fibrillated PTFE FA-500 was the most remarkable, with a pore mean diameter of 5.46 μm and a pore density of 1.86 × 109 cells/cm3 (neat PBS foam: 32.49 μm and 1.95 × 107 cells/cm3). Moreover, PBS/P500 foam always guarantees hydrophobicity.
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13
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14
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Shamsuddin MSM, Othman AH, Nasir RM, Hassan A, Senawi R, Thirmizir MZA, Ishak ZAM. Influence of
PTFE
as a solid lubricant on the mechanical, electrical, and tribological properties of
CF
‐reinforced
PC
composites. J Appl Polym Sci 2020. [DOI: 10.1002/app.50346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Ainur Hanim Othman
- School of Materials and Mineral Resources Engineering Universiti Sains Malaysia Penang Malaysia
| | - Ramdziah Md Nasir
- School of Mechanical Engineering Universiti Sains Malaysia Penang Malaysia
| | - Aziz Hassan
- Department of Chemistry, Polymer and Composite Materials Research Laboratory University of Malaya Kuala Lumpur Malaysia
| | - Rozaimi Senawi
- Polyloy Engineering Plastics Sdn. Bhd., Simpang Empat Penang Malaysia
| | - Mohd Zharif Ahmad Thirmizir
- Cluster for Polymer Composites, Science and Engineering Research Centre Universiti Sains Malaysia Penang Malaysia
| | - Zainal Arifin Mohd Ishak
- School of Materials and Mineral Resources Engineering Universiti Sains Malaysia Penang Malaysia
- Cluster for Polymer Composites, Science and Engineering Research Centre Universiti Sains Malaysia Penang Malaysia
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15
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Chen J, Yang L, Mai Q, Li M, Wu L, Kong P. Foaming behavior of poly(lactic acid) with different D-isomer content based on supercritical CO2-induced crystallization. J CELL PLAST 2020. [DOI: 10.1177/0021955x20950242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Using supercritical carbon dioxide (sc-CO2) as a physical foaming agent, the effect of sc-CO2 on the formation of crystalline domains and subsequently on the foaming behaviors of the two grades of PLA with different D-isomer content were investigated in a wide foaming temperature range. The PLA’s final crystallinity is significantly increased with decreasing annealing temperature and by reducing the D-isomer content. Cellular structure results show that not only the crystallinity but also the crystalline morphology play an important role in cellular structure. A novel spherulite morphology including ringless and ring-banded morphology in the same spherulite was formed at lower foaming temperature, as a result, some entities were nonuniformly distributed in the PLA foams. Uniform and closed cellular structure were obtained when only the ring-banded spherulites were formed. An opened and interconnected cellular structure is tended to be formed because of the synergistic effect of high temperature and plasticization of CO2. Based on the crystallinity and morphology, a suitable foaming window as a function of temperature is proposed. It is found that PLA with 4.1% D-isomer content had much broader suitable foaming window range to produce homogeneous cellular structure.
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Affiliation(s)
- Jinwei Chen
- Advanced Research Center for Polymer Processing Engineering of Guangdong Province, Guangzhou, China
- School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou, China
| | - Ling Yang
- School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou, China
| | - Qunshan Mai
- School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou, China
| | - Mei Li
- School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou, China
| | - Lixuan Wu
- School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou, China
| | - Ping Kong
- School of Light Chemical Technology, Guangdong Industry Polytechnic, Guangzhou, China
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16
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Villamil Jiménez JA, Le Moigne N, Bénézet JC, Sauceau M, Sescousse R, Fages J. Foaming of PLA Composites by Supercritical Fluid-Assisted Processes: A Review. Molecules 2020; 25:molecules25153408. [PMID: 32731388 PMCID: PMC7436275 DOI: 10.3390/molecules25153408] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 11/30/2022] Open
Abstract
Polylactic acid (PLA) is a well-known and commercially available biopolymer that can be produced from different sources. Its different characteristics generated a great deal of interest in various industrial fields. Besides, its use as a polymer matrix for foam production has increased in recent years. With the rise of technologies that seek to reduce the negative environmental impact of processes, chemical foaming agents are being substituted by physical agents, primarily supercritical fluids (SCFs). Currently, the mass production of low-density PLA foams with a uniform cell morphology using SCFs as blowing agents is a challenge. This is mainly due to the low melt strength of PLA and its slow crystallization kinetics. Among the different options to improve the PLA characteristics, compounding it with different types of fillers has great potential. This strategy does not only have foaming advantages, but can also improve the performances of the final composites, regardless of the implemented foaming process, i.e., batch, injection molding, and extrusion. In addition, the operating conditions and the characteristics of the fillers, such as their size, shape factor, and surface chemistry, play an important role in the final foam morphology. This article proposes a critical review on the different SCF-assisted processes and effects of operating conditions and fillers on foaming of PLA composites.
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Affiliation(s)
- Jennifer Andrea Villamil Jiménez
- Polymers Composites and Hybrids (PCH), IMT Mines Ales, 30100 Ales, France; (J.A.V.J.); (J.-C.B.)
- Centre RAPSODEE, IMT Mines Albi, CNRS, Université de Toulouse, 81013 Albi, France; (M.S.); (R.S.)
| | - Nicolas Le Moigne
- Polymers Composites and Hybrids (PCH), IMT Mines Ales, 30100 Ales, France; (J.A.V.J.); (J.-C.B.)
- Correspondence: (N.L.M.); (J.F.)
| | - Jean-Charles Bénézet
- Polymers Composites and Hybrids (PCH), IMT Mines Ales, 30100 Ales, France; (J.A.V.J.); (J.-C.B.)
| | - Martial Sauceau
- Centre RAPSODEE, IMT Mines Albi, CNRS, Université de Toulouse, 81013 Albi, France; (M.S.); (R.S.)
| | - Romain Sescousse
- Centre RAPSODEE, IMT Mines Albi, CNRS, Université de Toulouse, 81013 Albi, France; (M.S.); (R.S.)
| | - Jacques Fages
- Centre RAPSODEE, IMT Mines Albi, CNRS, Université de Toulouse, 81013 Albi, France; (M.S.); (R.S.)
- Correspondence: (N.L.M.); (J.F.)
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17
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Ni J, Yu K, Zhou H, Mi J, Chen S, Wang X. Morphological evolution of PLA foam from microcellular to nanocellular induced by cold crystallization assisted by supercritical CO2. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2019.104719] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Yang L, Zhen W. Preparation and characterization of phosphorylated graphene oxide grafted with poly(L‐lactide) and its effect on the crystallization, rheological behavior, and performance of poly (lactic acid). POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4717] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Li Yang
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous RegionXinjiang University Urumqi China
| | - Weijun Zhen
- Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uygur Autonomous RegionXinjiang University Urumqi China
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19
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Lei XX, Lu H, Lu L, Xu HQ, Zhou YG, Zou J. Improving the Thermal and Mechanical Properties of Poly(l-lactide) by Forming Nanocomposites with an in Situ Ring-Opening Intermediate of Poly(l-lactide) and Polyhedral Oligomeric Silsesquioxane. NANOMATERIALS 2019; 9:nano9050748. [PMID: 31096704 PMCID: PMC6566323 DOI: 10.3390/nano9050748] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/04/2019] [Accepted: 05/13/2019] [Indexed: 12/13/2022]
Abstract
In this study, a series of poly(l-lactide) and (3-amino)-propylheptaisobutyl cage silsesquioxane (PLLA-AMPOSS) intermediates were first fabricated using single-arm in situ solution polymerization of LLA monomers and AMPOSS nanoparticles with different contents, 0.02-1.00 mol%. Then, the PLLA-AMPOSS intermediate with 0.5 mol% AMPOSS was selected as a representative and investigated by nuclear magnetic resonance (NMR) and X-ray diffraction (XRD). Afterwards, it was added into the pure PLLA with different mass fractions. Finally, the thermal behavior, crystallization kinetics, morphological characteristics, and mechanical properties of the obtained PLLA/PLLA-AMPOSS nanocomposites were carefully measured and investigated by differential scanning calorimetry (DSC), polarizing microscopy (POM), scanning electron microscopy (SEM), and tensile test. After comparing the PLLA-AMPOSS intermediate and PLLA/AMPOSS blend, the results show that the ring-open polymerization of PLLA-AMPOSS intermediate was successful. The results also show that the existence of PLLA-AMPOSS has a strong influence on the crystallization behavior of PLLA/PLLA-AMPOSS composites, which can be attributed to the heterogeneous nucleation effect of PLLA-AMPOSS. In addition, it was also found from the tensile test results that the addition of the PLLA-AMPOSS nanofiller improved the tensile strength and strain at break of PLLA/PLLA-AMPOSS nanocomposites. All of these results indicate the good nucleating effect of PLLA-AMPOSS and that the AMPOSS disperses well in the PLLA/PLLA-AMPOSS nanocomposites. A conclusion can be drawn that the selective nucleating agent and the combined method of in situ ring-opening polymerization and physical blending are feasible and effective.
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Affiliation(s)
- Xiu-Xiu Lei
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
| | - Hao Lu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
| | - Lei Lu
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
| | - Hai-Qing Xu
- Jiangsu Provincial Engineering Laboratory for Advanced Materials of Salt Chemical Industry, Huaiyin Institute of Technology, Huai'an 223003, China.
| | - Ying-Guo Zhou
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
| | - Jun Zou
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
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20
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Gong X, Cheng C, Tang CY, Law WC, Lin X, Chen Y, Chen L, Tsui GCP, Rao N. Crystallization behavior of polylactide matrix under the influence of nano-magnetite. POLYM ENG SCI 2019. [DOI: 10.1002/pen.24976] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xinghou Gong
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing; School of Materials and Chemistry Engineering, Hubei University of Technology; Wuhan Hubei Province, 430068 China
- Department of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hung Hom, Kowloon, Hong Kong SAR China
| | - Cheng Cheng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing; School of Materials and Chemistry Engineering, Hubei University of Technology; Wuhan Hubei Province, 430068 China
| | - Chak Yin Tang
- Department of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hung Hom, Kowloon, Hong Kong SAR China
| | - Wing-Cheung Law
- Department of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hung Hom, Kowloon, Hong Kong SAR China
| | - Xueting Lin
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing; School of Materials and Chemistry Engineering, Hubei University of Technology; Wuhan Hubei Province, 430068 China
| | - Yehuang Chen
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing; School of Materials and Chemistry Engineering, Hubei University of Technology; Wuhan Hubei Province, 430068 China
| | - Ling Chen
- Department of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hung Hom, Kowloon, Hong Kong SAR China
| | - Gary Chi Pong Tsui
- Department of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hung Hom, Kowloon, Hong Kong SAR China
| | - Nanxi Rao
- Department of Industrial and Systems Engineering; The Hong Kong Polytechnic University; Hung Hom, Kowloon, Hong Kong SAR China
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21
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Mi HY, Jing X, Liu Y, Li L, Li H, Peng XF, Zhou H. Highly Durable Superhydrophobic Polymer Foams Fabricated by Extrusion and Supercritical CO 2 Foaming for Selective Oil Absorption. ACS APPLIED MATERIALS & INTERFACES 2019; 11:7479-7487. [PMID: 30672685 DOI: 10.1021/acsami.8b21858] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The severe water contamination caused by oil leakage is calling for low-cost and high-performance absorbent materials for selective oil removal. In this study, a scalable green method was proposed to produce polypropylene (PP)/poly(tetrafluoroethylene) (PTFE) composite foams via conventional processing techniques including twin-screw extrusion and supercritical carbon dioxide foaming. To produce the superhydrophobic foam, micro- and nanosized PTFE particles were melt blended with PP and subsequently foamed. Ascribed to the nanofibrillation of microsized PTFE during processing, the fabricated foam exhibited a special highly porous structure with PTFE nanofibrils and nanoparticles uniformly distributed on the pore surfaces within the PP matrix, which resulted in a remarkably high water contact angle of 156.8° and a low contact angle hysteresis of 1.9°. Unlike traditional surface-modified superhydrophobic absorbers, the foams prepared are entirely superhydrophobic, which means that they remain superhydrophobic when being fractured or cut. Moreover, they are highly durable and maintained the superhydrophobicity when subjected to ultrasonication and mechanical sanding. When used in selective oil absorption, the durable foams exhibited excellent absorption efficiency and high stability in repetitive and long-term use. These advantages make the PP/PTFE foam a promising superabsorbent material for water remediation.
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Affiliation(s)
- Hao-Yang Mi
- School of Packaging and Materials Engineering , Hunan University of Technology , Zhuzhou 412007 , China
- Faculty of Construction and Environment , Hong Kong Polytechnic University , Kowloon 518000 , Hong Kong , China
| | - Xin Jing
- School of Packaging and Materials Engineering , Hunan University of Technology , Zhuzhou 412007 , China
| | - Yuejun Liu
- School of Packaging and Materials Engineering , Hunan University of Technology , Zhuzhou 412007 , China
| | - Lengwan Li
- Department of Industrial Equipment and Control Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Heng Li
- Faculty of Construction and Environment , Hong Kong Polytechnic University , Kowloon 518000 , Hong Kong , China
| | - Xiang-Fang Peng
- Department of Industrial Equipment and Control Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Huamin Zhou
- State Key Laboratory of Materials Processing and Die & Mould Technology , Huazhong University of Science and Technology , Wuhan 430000 , China
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22
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Standau T, Zhao C, Murillo Castellón S, Bonten C, Altstädt V. Chemical Modification and Foam Processing of Polylactide (PLA). Polymers (Basel) 2019; 11:E306. [PMID: 30960290 PMCID: PMC6419231 DOI: 10.3390/polym11020306] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/06/2019] [Accepted: 02/07/2019] [Indexed: 11/16/2022] Open
Abstract
Polylactide (PLA) is known as one of the most promising biopolymers as it is derived from renewable feedstock and can be biodegraded. During the last two decades, it moved more and more into the focus of scientific research and industrial use. It is even considered as a suitable replacement for standard petroleum-based polymers, such as polystyrene (PS), which can be found in a wide range of applications-amongst others in foams for packaging and insulation applications-but cause strong environmental issues. PLA has comparable mechanical properties to PS. However, the lack of melt strength is often referred to as a drawback for most foaming processes. One way to overcome this issue is the incorporation of chemical modifiers which can induce chain extension, branching, or cross-linking. As such, a wide variety of substances were studied in the literature. This work should give an overview of the most commonly used chemical modifiers and their effects on rheological, thermal, and foaming behavior. Therefore, this review article summarizes the research conducted on neat and chemically modified PLA foamed with the conventional foaming methods (i.e., batch foaming, foam extrusion, foam injection molding, and bead foaming).
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Affiliation(s)
- Tobias Standau
- Depatment of Polymer Engineering, University Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany.
| | - Chunjing Zhao
- Depatment of Polymer Engineering, University Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany.
| | - Svenja Murillo Castellón
- Institut für Kunststofftechnik, University of Stuttgart, Pfaffenwaldring 32, 70569 Stuttgart, Germany.
| | - Christian Bonten
- Institut für Kunststofftechnik, University of Stuttgart, Pfaffenwaldring 32, 70569 Stuttgart, Germany.
| | - Volker Altstädt
- Depatment of Polymer Engineering, University Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany.
- Bavarian Polymer Institute and Bayreuth Institute of Macromolecular Research, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany.
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23
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Athanasoulia II, Tarantili PA. Thermal transitions and stability of melt mixed TiO
2
/Poly(L‐lactic acid) nanocomposites. POLYM ENG SCI 2018. [DOI: 10.1002/pen.24986] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ioanna‐Georgia I. Athanasoulia
- Polymer Technology LaboratorySchool of Chemical Engineering, National Technical University of Athens 9 Heroon Polytechniou Street, Zographou, Athens, GR15780 Greece
| | - Petroula A. Tarantili
- Polymer Technology LaboratorySchool of Chemical Engineering, National Technical University of Athens 9 Heroon Polytechniou Street, Zographou, Athens, GR15780 Greece
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24
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Wang X, Mi J, Wang J, Zhou H, Wang X. Multiple actions of poly(ethylene octene) grafted with glycidyl methacrylate on the performance of poly(lactic acid). RSC Adv 2018; 8:34418-34427. [PMID: 35548650 PMCID: PMC9087122 DOI: 10.1039/c8ra07510g] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 10/03/2018] [Indexed: 01/20/2023] Open
Abstract
Poly(ethylene octene) grafted with glycidyl methacrylate (POE-g-GMA) was employed to improve the rheological and thermal properties, toughness, and foaming behaviors of poly(lactic acid) (PLA) through a chain extension effect.
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Affiliation(s)
- Xianzeng Wang
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics
| | - Jianguo Mi
- State Key Laboratory of Organic–Inorganic Composites
- Beijing University of Chemical Technology
- Beijing 100029
- People's Republic of China
| | - Jie Wang
- Applied Chemistry Department
- Yuncheng University
- Yuncheng 044000
- People's Republic of China
| | - Hongfu Zhou
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics
| | - Xiangdong Wang
- School of Materials Science and Mechanical Engineering
- Beijing Technology and Business University
- Beijing 100048
- People's Republic of China
- Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics
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25
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Huang A, Peng X, Turng LS. In-situ fibrillated polytetrafluoroethylene (PTFE) in thermoplastic polyurethane (TPU) via melt blending: Effect on rheological behavior, mechanical properties, and microcellular foamability. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.11.053] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Zhou B, Liu Z, Xu B, Rogachev A, Yarmolenko M, Rogachev A. Modification of Cu-PE-PTFE composite coatings on rubber surface by low-energy electron beam dispersion with glow discharge. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bing Zhou
- Research institute of surface engineering; Taiyuan University of Technology; Taiyuan 030024 China
| | - Zhubo Liu
- Research institute of surface engineering; Taiyuan University of Technology; Taiyuan 030024 China
| | - Bin Xu
- Research institute of surface engineering; Taiyuan University of Technology; Taiyuan 030024 China
| | - A.V. Rogachev
- Department of Physics; Francisk Skorina Gomel State University; Gomel 246019 Belarus
| | - M.A. Yarmolenko
- Department of Physics; Francisk Skorina Gomel State University; Gomel 246019 Belarus
| | - A.A. Rogachev
- Department of Physics; Francisk Skorina Gomel State University; Gomel 246019 Belarus
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27
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Huang A, Jiang Y, Napiwocki B, Mi H, Peng X, Turng LS. Fabrication of poly(ε-caprolactone) tissue engineering scaffolds with fibrillated and interconnected pores utilizing microcellular injection molding and polymer leaching. RSC Adv 2017. [DOI: 10.1039/c7ra06987a] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three-dimensional fibrillated interconnected porous poly(ε-caprolactone) scaffolds were prepared by microcellular injection molding and polymer leaching.
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Affiliation(s)
- An Huang
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou
- China
- Department of Mechanical Engineering
| | - Yongchao Jiang
- Department of Mechanical Engineering
- University of Wisconsin-Madison
- Madison
- USA
- Wisconsin Institute for Discovery
| | - Brett Napiwocki
- Wisconsin Institute for Discovery
- University of Wisconsin-Madison
- Madison
- USA
- Department of Biomedical Engineering
| | - Haoyang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou
- China
- Department of Mechanical Engineering
| | - Xiangfang Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou
- China
| | - Lih-Sheng Turng
- Department of Mechanical Engineering
- University of Wisconsin-Madison
- Madison
- USA
- Wisconsin Institute for Discovery
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