1
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From the perspective of cells as dispersed phase in foam injection molding: Cell deformation of PP/PTFE foams. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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2
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Li Z, Wang X, Wang Y, Chen S. Preparing low-Density microcellular polystyrene foam by in-Situ fibrillated PTFE and supramolecular nucleator TMC-300 in the presence of sc-CO 2. J CELL PLAST 2023. [DOI: 10.1177/0021955x231154619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
A method using in-situ fibrillated polytetrafluoroethylene (PTFE) and octamethylenedicarboxylicdibenzoylhydrazide (TMC-300) supramolecular nucleator was presented to prepare low density polystyrene foams. This study used a torque rheometer in the molten compound preparation of PS/fibrillated-PTFE/TMC-300 composites. Scanning electron microscopy showed in-situ fibrillated polytetrafluoroethylene in Polystyrene melt and a nanofiber network with high aspect ratio. The formation of nanometer-sized fiber networks improved the melt viscoelasticity of matrices which promoted cell nucleation. As the results demonstrated, low-density foams with 11 μm average cell size were obtained using Polystyrene. The self-assembly nucleating agent TMC-300 was then introduced to the composite materials. TMC-300 and polytetrafluoroethylene as a composite cell nucleating agent were used in Polystyrene foams. Meanwhile, their nucleating efficiency was investigated. TMC-300 completed self-assembly in Polystyrene and served as composite nucleating agent in combination with polytetrafluoroethylene. Compared with the sample PS/PTFE-0.5, the average cell size of the sample PS/PTFE-0.5/TMC-2 had a reduction rate of 28.16% from 12.18 μm to 8.75 μm. The cell density increased by an order of magnitude. The composite nucleating agent was successful in controlling Polystyrene foam cell morphology, thus leading to the preparation of low-density Polystyrene microporous foams.
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Affiliation(s)
- Zhuolun Li
- College 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
- College 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
| | - Yaqiao Wang
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, China
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Shihong Chen
- College 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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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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Wang Z, Wang J, Pang Y, Yan M, Shao W, Zhu J, Zheng W. To Effectively Tune the Cell Structure of Poly(ethylene 2,5-furandicarboxylate- co-ethylene terephthalate) Copolyester Foams via Conducting a Prior Isothermal Melt Crystallization. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Zhijun Wang
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
- Faculty of Material Metallurgical and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000Jiangxi Province, China
| | - Jinggang Wang
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
| | - Yongyan Pang
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
| | - Ming Yan
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
| | - Weiwei Shao
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
| | - Jin Zhu
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
| | - Wenge Zheng
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Laboratory of Polymers and Composites, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201Zhejiang Province, China
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5
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He J, Ma Y, Xie J, Wu G, Yang W, Xie P. Preparation of lightweight and high‐strength polypropylene‐based ternary conductive polymer foams by in situ microfiber reinforcement. J Appl Polym Sci 2022. [DOI: 10.1002/app.53432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jianyun He
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing People's Republic of China
| | - Yitao Ma
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing People's Republic of China
| | - Jinzhao Xie
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing People's Republic of China
| | - Gaojian Wu
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing People's Republic of China
| | - Weimin Yang
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing People's Republic of China
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
| | - Pengcheng Xie
- College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing People's Republic of China
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing People's Republic of China
- Interdisciplinary Research Center for Artificial Intelligence Beijing University of Chemical Technology Beijing People's Republic of China
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6
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Dependence of the foaming window of poly(ethylene terephthalate-co-ethylene 2,5-furandicarboxylate) copolyesters on FDCA content. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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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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Supercritical CO2 foaming and shrinkage resistance of thermoplastic polyurethane/modified magnesium borate whisker composite. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101887] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Effect of the crystallization of modified polybutylene terephthalate on its foaming using supercritical CO2: Transition from microcellular to nanocellular foam. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2021.105463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Peculiar micro and nano cell morphology of PBT/PTFE nanofibrillated composite foams of supercritical CO2 foaming induced by in-situ formed 3D PTFE nanofiber networks. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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11
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Li J, Wang H, Zhou H, Jiang J, Wang X, Li Q. Fabrication of Highly Interconnected Poly(ε-caprolactone)/cellulose Nanofiber Composite Foams by Microcellular Foaming and Leaching Processes. ACS OMEGA 2021; 6:22672-22680. [PMID: 34514238 PMCID: PMC8427651 DOI: 10.1021/acsomega.1c02768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
In this study, microcellular polycaprolactone (PCL)/sodium bicarbonate (NaHCO3)/cellulose nanofiber (CNF) composite foams with highly interconnected porous structures were successfully fabricated by microcellular foaming and particle leaching processes. Supercritical CO2 (scCO2) served as a physical foaming agent, NaHCO3 was chosen as a chemical foaming agent and porogen, and CNF acted as a heterogeneous nucleating agent. The effect of scCO2, NaHCO3, and CNF on pore structures and the cofoaming mechanism were investigated. The results indicated that the addition of NaHCO3 and CNF increased the melt strength of the PCL matrix significantly. During the foaming process, the presence of CNF can form a rigid network due to the hydrogen bonding or mechanical entanglement between individual nanofibers, improving the nucleating efficiency but slowing down the cell growth rate. Additionally, due to the interaction of "soft" PCL matrix and "hard" domains in a PCL-based composite during the foaming process, together with the NaHCO3 leaching process, highly interconnected cell structures appeared. The obtained PCL/NaHCO3/CNF composite foams had a cell size of 15.8 μm and cell density of 6.3 × 107 cells/cm3, as well as an open-cell content of 82%. The reported strategy in this paper may provide the guidelines and data supports for the fabrication of a PCL-based porous scaffold.
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Affiliation(s)
- Jiawei Li
- School
of Mechanics & Safety Engineering, National Center for International
Joint research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Hongyao Wang
- School
of Mechanics & Safety Engineering, National Center for International
Joint research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Hongfu Zhou
- Beijing
Key Laboratory of Quality Evaluation Technology for Hygiene and Safety
of Plastics, Beijing Technology and Business
University, Beijing 100048, China
| | - Jing Jiang
- School
of Mechanical & Power Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Xiaofeng Wang
- School
of Mechanics & Safety Engineering, National Center for International
Joint research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
| | - Qian Li
- School
of Mechanics & Safety Engineering, National Center for International
Joint research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou 450001, China
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Li H, Tuo X, Guo BH, Yu J, Guo ZX. Comparison of Three Interfacial Conductive Networks Formed in Carbon Black-Filled PA6/PBT Blends. Polymers (Basel) 2021; 13:polym13172926. [PMID: 34502966 PMCID: PMC8434115 DOI: 10.3390/polym13172926] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 01/16/2023] Open
Abstract
Interfacial localization of carbon fillers in cocontinuous-structured polymer blends is well-known as a high-efficiency strategy for conductive network formation. However, a comparison with interfacial localization of carbon fillers in sea-island-structured polymer blends is lacking. Here, three types of highly efficient conductive networks formed on the basis of interfacial localization of carbon black (CB) in polyamide 6 (PA6)/poly(butylene terephthalate) (PBT) blends with different blend compositions (80/20, 50/50 and 20/80 vol/vol) were investigated and compared in terms of electrical resistivity, morphology as well as rheological and mechanical properties. The order of the electrical percolation threshold of CB in the three blends is 50/50 < 20/80 < 80/20, which can be attributed to different network structures. The rheological percolation thresholds are close to the electrical ones, confirming the formation of CB networks. The formation mechanisms for the three types of CB network structures are analyzed. All the three types of PA6/PBT-6 vol% CB composites showed improved tensile strength compared with PA6/PBT blends, being in favor for practical applications.
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13
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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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