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Lee H, Trinh BM, Mekonnen TH. Fabrication of Triblock Elastomer Foams and Gelation Studies for Oil Spill Remediation. Macromol Rapid Commun 2024:e2400232. [PMID: 38840422 DOI: 10.1002/marc.202400232] [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: 04/12/2024] [Revised: 05/23/2024] [Indexed: 06/07/2024]
Abstract
Polymeric foamed materials are among the most widely utilized technologies for oil spill accidents and releases of oil-contaminated wastewater oil due to their porosity to absorb and separate oil/water effectively. However, a major limitation of traditional polymeric foams is their reliance on an ad/absorption mechanism as the sole method of oil capture, leading to potential oil leakage once their saturation point is exceeded. Tri-block polymer styrene-ethylene-butylene-styrene (SEBS) is a fascinating absorbent material that can bypass this limitation by both capturing oil and providing a sealing mechanism via gelation to prevent oil leakage due to its unique chemical structure. SEBS foams are produced via simultaneous crosslinking and foaming that results in an impressive expansion ratio of up to 15.2 with over 93% porosity. Most importantly, the SEBS foams show great potential as oil absorbents in spill remediation, demonstrating rapid and efficient oil absorption coupled with superhydrophobic properties. Moreover, the unique interaction between the oil and SEBS enables the formation of a physical gel, acting as an effective barrier against oil leakage. These findings indicate the potential for commercializing SEBS foam as a viable option for geotextiles to mitigate oil spill concerns from infrastructures.
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Affiliation(s)
- Hyejin Lee
- Department of Chemical Engineering, Institute of Polymer Research, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, N2V 0E6, Canada
| | - Binh M Trinh
- Department of Chemical Engineering, Institute of Polymer Research, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, N2V 0E6, Canada
| | - Tizazu H Mekonnen
- Department of Chemical Engineering, Institute of Polymer Research, Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, N2V 0E6, Canada
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2
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Gonçalves LFFF, Reis RL, Fernandes EM. Forefront Research of Foaming Strategies on Biodegradable Polymers and Their Composites by Thermal or Melt-Based Processing Technologies: Advances and Perspectives. Polymers (Basel) 2024; 16:1286. [PMID: 38732755 PMCID: PMC11085284 DOI: 10.3390/polym16091286] [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: 01/12/2024] [Revised: 04/13/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
The last few decades have witnessed significant advances in the development of polymeric-based foam materials. These materials find several practical applications in our daily lives due to their characteristic properties such as low density, thermal insulation, and porosity, which are important in packaging, in building construction, and in biomedical applications, respectively. The first foams with practical applications used polymeric materials of petrochemical origin. However, due to growing environmental concerns, considerable efforts have been made to replace some of these materials with biodegradable polymers. Foam processing has evolved greatly in recent years due to improvements in existing techniques, such as the use of supercritical fluids in extrusion foaming and foam injection moulding, as well as the advent or adaptation of existing techniques to produce foams, as in the case of the combination between additive manufacturing and foam technology. The use of supercritical CO2 is especially advantageous in the production of porous structures for biomedical applications, as CO2 is chemically inert and non-toxic; in addition, it allows for an easy tailoring of the pore structure through processing conditions. Biodegradable polymeric materials, despite their enormous advantages over petroleum-based materials, present some difficulties regarding their potential use in foaming, such as poor melt strength, slow crystallization rate, poor processability, low service temperature, low toughness, and high brittleness, which limits their field of application. Several strategies were developed to improve the melt strength, including the change in monomer composition and the use of chemical modifiers and chain extenders to extend the chain length or create a branched molecular structure, to increase the molecular weight and the viscosity of the polymer. The use of additives or fillers is also commonly used, as fillers can improve crystallization kinetics by acting as crystal-nucleating agents. Alternatively, biodegradable polymers can be blended with other biodegradable polymers to combine certain properties and to counteract certain limitations. This work therefore aims to provide the latest advances regarding the foaming of biodegradable polymers. It covers the main foaming techniques and their advances and reviews the uses of biodegradable polymers in foaming, focusing on the chemical changes of polymers that improve their foaming ability. Finally, the challenges as well as the main opportunities presented reinforce the market potential of the biodegradable polymer foam materials.
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Affiliation(s)
- Luis F. F. F. Gonçalves
- 3B’s Research Group, I3Bs–Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal;
- ICVS/3B’s—PT Government Associate Laboratory, Barco, 4805-017 Guimarães, Portugal
| | - Rui L. Reis
- 3B’s Research Group, I3Bs–Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal;
- ICVS/3B’s—PT Government Associate Laboratory, Barco, 4805-017 Guimarães, Portugal
| | - Emanuel M. Fernandes
- 3B’s Research Group, I3Bs–Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017 Guimarães, Portugal;
- ICVS/3B’s—PT Government Associate Laboratory, Barco, 4805-017 Guimarães, Portugal
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3
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Lu Z, Zhang H, Toivakka M, Xu C. Current progress in functionalization of cellulose nanofibers (CNFs) for active food packaging. Int J Biol Macromol 2024; 267:131490. [PMID: 38604423 DOI: 10.1016/j.ijbiomac.2024.131490] [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: 02/03/2024] [Revised: 04/06/2024] [Accepted: 04/07/2024] [Indexed: 04/13/2024]
Abstract
There is a growing interest in utilizing renewable biomass resources to manufacture environmentally friendly active food packaging, against the petroleum-based polymers. Cellulose nanofibers (CNFs) have received significant attention recently due to their sustainability, biodegradability, and widely available sources. CNFs are generally obtained through chemical or physical treatment, wherein the original surface chemistry and interfacial interactions can be changed if the functionalization process is applied. This review focuses on promising and sustainable methods of functionalization to broaden the potential uses of CNFs in active food packaging. Novel aspects, including functionalization before, during and after cellulose isolation, and functionalization during and after material processing are addressed. The CNF-involved structural construction including films, membranes, hydrogels, aerogels, foams, and microcapsules, is illustrated, which enables to explore the correlations between structure and performance in active food packaging. Additionally, the enhancement of CNFs on multiple properties of active food packaging are discussed, in which the interaction between active packaging systems and encapsulated food or the internal environment are highlighted. This review emphasizes novel approaches and emerging trends that have the potential to revolutionize the field, paving the way for advancements in the properties and applications of CNF-involved active food packaging.
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Affiliation(s)
- Zonghong Lu
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Turku, Finland
| | - Hao Zhang
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Turku, Finland
| | - Martti Toivakka
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Turku, Finland.
| | - Chunlin Xu
- Laboratory of Natural Materials Technology, Åbo Akademi University, 20500 Turku, Finland.
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4
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Lima GMR, Mukherjee A, Picchioni F, Bose RK. Characterization of Biodegradable Polymers for Porous Structure: Further Steps toward Sustainable Plastics. Polymers (Basel) 2024; 16:1147. [PMID: 38675066 PMCID: PMC11054705 DOI: 10.3390/polym16081147] [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: 03/11/2024] [Revised: 04/07/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
Plastic pollution poses a significant environmental challenge, necessitating the investigation of bioplastics with reduced end-of-life impact. This study systematically characterizes four promising bioplastics-polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), and polylactic acid (PLA). Through a comprehensive analysis of their chemical, thermal, and mechanical properties, we elucidate their structural intricacies, processing behaviors, and potential morphologies. Employing an environmentally friendly process utilizing supercritical carbon dioxide, we successfully produced porous materials with microcellular structures. PBAT, PBS, and PLA exhibit closed-cell morphologies, while PHBV presents open cells, reflecting their distinct overall properties. Notably, PBAT foam demonstrated an average porous area of 1030.86 μm2, PBS showed an average porous area of 673 μm2, PHBV displayed open pores with an average area of 116.6 μm2, and PLA exhibited an average porous area of 620 μm2. Despite the intricacies involved in correlating morphology with material properties, the observed variations in pore area sizes align with the findings from chemical, thermal, and mechanical characterization. This alignment enhances our understanding of the morphological characteristics of each sample. Therefore, here, we report an advancement and comprehensive research in bioplastics, offering deeper insights into their properties and potential morphologies with an easy sustainable foaming process. The alignment of the process with sustainability principles, coupled with the unique features of each polymer, positions them as environmentally conscious and versatile materials for a range of applications.
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Affiliation(s)
| | | | | | - Ranjita K. Bose
- Product Technology Department, University of Groningen, 9747 AG Groningen, The Netherlands; (G.M.R.L.); (A.M.); (F.P.)
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5
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Yang H, Xu G, Li J, Wang L, Yu K, Yan J, Zhang S, Zhou H. Fabrication of bio-based biodegradable poly(lactic acid) (PLA) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) composite foams for highly efficient oil-water separation. Int J Biol Macromol 2024; 257:128750. [PMID: 38101682 DOI: 10.1016/j.ijbiomac.2023.128750] [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: 10/29/2023] [Revised: 11/27/2023] [Accepted: 12/09/2023] [Indexed: 12/17/2023]
Abstract
The open-cell bio-based biodegradable polymer foams show good application prospect in dealing with the serious environmental issue caused by oil spill and organic solvents spills, while the cell structures and hydrophobic properties of the foams limit their performance. In this work, the poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was selected to help prepare bio-based biodegradable poly(lactic acid) (PLA) foams. Based on a two-step foaming method, the crystallization ability of different samples was regulated by the "original crystals" together with PHBV in the foaming process, where skeleton structures were provided to facilitate the open-cell structures and promote their mechanical property. As illustrated, PHBV facilitated the formation of open-cell PLA foams, where the foams displayed superior oil-water separation capacity. The maximum volume expansion ratio of the foams was 80.08, the contact angle of deionized water reached to 134.5°, the adsorption capacity for oil or organic solvents was 10.8 g/g-51.8 g/g, and the adsorption capacity for CCl4 can still maintained 83.5 % of the initial value after 10 adsorption-desorption cycles. This work not only clarified the foaming mechanism of open-cell foams, but also provided a green and simple method for preparing bio-based biodegradable foams possessing excellent oil-water separation performance.
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Affiliation(s)
- Hailong Yang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Guohe Xu
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Jiantong Li
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Linyan Wang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China.
| | - Kesong Yu
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450002, People's Republic of China
| | - Jundian Yan
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Shuo Zhang
- College of Science & Technology, Hebei Agricultural University, Huanghua, Hebei 061100, People's Republic of China
| | - Hongfu Zhou
- Key Laboratory of Processing and Application of Polymeric Foams of China National Light Industry Council, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, People's Republic of China.
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Xu M, Wu M, Li X, Tang J, Ma W, Zhu X, Ren Q, Wang L, Zheng W. Biodegradable nanofibrillated microcellular PBS/PLA foams for selective oil absorption. Int J Biol Macromol 2024; 254:127844. [PMID: 37923032 DOI: 10.1016/j.ijbiomac.2023.127844] [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: 08/13/2023] [Revised: 10/20/2023] [Accepted: 10/31/2023] [Indexed: 11/07/2023]
Abstract
To address the challenges posed by spilled oil and oily wastewater, the development of clean oil-adsorption materials is crucial. However, traditional oil-adsorption materials suffer from the issue of secondary pollution. Herein, fully biodegradable nanofibrillated poly(butylene succinate)/poly(lactic acid) (PBS/PLA) foams with outstanding selective oil-adsorption performance were successfully fabricated via an eco-friendly supercritical CO2 foaming technology. The PBS/PLA composites, featuring nanofibrils with a diameter of approximately 100 nm, were prepared through a hot-stretching method subsequent to extrusion. Substantial improvements were observed in the crystallization rate and rheological properties of the fibrillated PBS/PLA composites. Furthermore, PLA nanofibrils enhanced foamability of the composite, achieving an impressive expansion ratio of up to 38.0, resulting in an outstanding oil-absorption performance (19.2-50.4 g/g) of the F-1 %-95 foam. Additionally, 20 adsorption-desorption cycles illustrated the prepared F-1 %-95 foam displayed recyclable oil-absorption characteristics. This work provides an eco-friendly strategy for preparing fully biodegradable foams intended for application as oil-adsorption materials.
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Affiliation(s)
- Mingxian Xu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Minghui Wu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China
| | - Xueyun Li
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Jiayi Tang
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China
| | - Wenyu Ma
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xiuyu Zhu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China
| | - Qian Ren
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Long Wang
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Wenge Zheng
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang Province 315201, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
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7
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Li D, Zhang S, Zhao Z, Miao Z, Zhang G, Shi X. High-Expansion Open-Cell Polylactide Foams Prepared by Microcellular Foaming Based on Stereocomplexation Mechanism with Outstanding Oil-Water Separation. Polymers (Basel) 2023; 15:polym15091984. [PMID: 37177130 PMCID: PMC10181122 DOI: 10.3390/polym15091984] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/05/2023] [Accepted: 04/11/2023] [Indexed: 05/15/2023] Open
Abstract
Biodegradable polylactic acid (PLA) foams with open-cell structures are good candidates for oil-water separation. However, the foaming of PLA with high-expansion and uniform cell morphology by the traditional supercritical carbon dioxide microcellular foaming method remains a big challenge due to its low melting strength. Herein, a green facile strategy for the fabrication of open-cell fully biodegradable PLA-based foams is proposed by introducing the unique stereocomplexation mechanism between PLLA and synthesized star-shaped PDLA for the first time. A series of star-shaped PDLA with eight arms (8-s-PDLA) was synthesized with different molecular weights and added into the PLLA as modifiers. PLLA/8-s-PDLA foams with open-cells structure and high expansion ratios were fabricated by microcellular foaming with green supercritical carbon dioxide. In detail, the influences of induced 8-s-PDLA on the crystallization behavior, rheological properties, cell morphology and consequential oil-water separation performance of PLA-based foam were investigated systemically. The addition of 8-s-PDLA induced the formation of SC-PLA, enhancing crystallization by acting as nucleation sites and improving the melting strength through acting as physical cross-linking points. The further microcellular foaming of PLLA/8-s-PDLA resulted in open-cell foams of high porosity and high expansion ratios. With an optimized foaming condition, the PLLA/8-s-PDLA-13K foam exhibited an average cell size of about 61.7 μm and expansion ratio of 24. Furthermore, due to the high porosity of the interconnected open cells, the high-absorption performance of the carbon tetrachloride was up to 37 g/g. This work provides a facile green fabrication strategy for the development of environmentally friendly PLA foams with stable open-cell structures and high expansion ratios for oil-water separation.
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Affiliation(s)
- Dongsheng Li
- Key Laboratory of Macromolecular Science & Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Shuai Zhang
- Key Laboratory of Macromolecular Science & Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Zezhong Zhao
- Key Laboratory of Macromolecular Science & Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Zhenyun Miao
- Key Laboratory of Macromolecular Science & Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Guangcheng Zhang
- Key Laboratory of Macromolecular Science & Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Xuetao Shi
- Key Laboratory of Macromolecular Science & Technology of Shaanxi Province, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
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8
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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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9
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Zhou G, Liu W, Yin H, Zhang Y, Huang C. Effect of nano‐sized zinc citrate on the supercritical carbon dioxide‐assisted extrusion foaming behavior of poly(lactic acid). J Appl Polym Sci 2023. [DOI: 10.1002/app.53561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Gang Zhou
- School of Chemistry and Materials Engineering Wenzhou University Wenzhou China
| | - Wenjun Liu
- Institute of New Materials & Industry Technology Wenzhou University Wenzhou China
| | - Haiyan Yin
- Biomaterials Division, Wenzhou Institute University of Chinese Academy of Sciences Wenzhou China
| | - Yinhang Zhang
- School of Chemistry and Materials Engineering Wenzhou University Wenzhou China
| | - Chengzhe Huang
- School of Chemistry and Materials Engineering Wenzhou University Wenzhou China
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10
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Production and Application of Polymer Foams Employing Supercritical Carbon Dioxide. ADVANCES IN POLYMER TECHNOLOGY 2022. [DOI: 10.1155/2022/8905115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Polymeric foams have characteristics that make them attractive for different applications. However, some foaming methods rely on chemicals that are not environmentally friendly. One of the possibilities to tackle the environmental issue is to utilize supercritical carbon dioxide ScCO2 since it is a “green” solvent, thus facilitating a sustainable method of producing foams. ScCO2 is nontoxic, chemically inert, and soluble in molten plastic. It can act as a plasticizer, decreasing the viscosity of polymers according to temperature and pressure. Most foam processes can benefit from ScCO2 since the methods rely on nucleation, growth, and expansion mechanisms. Process considerations such as pretreatment, temperature, pressure, pressure drop, and diffusion time are relevant parameters for foaming. Other variables such as additives, fillers, and chain extenders also play a role in the foaming process. This review highlights the morphology, performance, and features of the foam produced with ScCO2, considering relevant aspects of replacing or introducing a novel foam. Recent findings related to foaming assisted by ScCO2 and how processing parameters influence the foam product are addressed. In addition, we discuss possible applications where foams have significant benefits. This review shows the recent progress and possibilities of ScCO2 in processing polymer foams.
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Xue K, Chen P, Yang C, Xu Z, Zhao L, Hu D. Low-shrinkage biodegradable PBST/PBS foams fabricated by microcellular foaming using CO2 & N2 as co-blowing agents. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Yu K, Wu Y, Zhang X, Hou J, Chen J. Microcellular open-cell poly(l-lactic acid)/poly(d-lactic acid) foams for oil-water separation prepared via supercritical CO2 foaming. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Processing Compostable PLA/Organoclay Bionanocomposite Foams by Supercritical CO2 Foaming for Sustainable Food Packaging. Polymers (Basel) 2022; 14:polym14204394. [PMID: 36297972 PMCID: PMC9612032 DOI: 10.3390/polym14204394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/09/2022] [Accepted: 10/13/2022] [Indexed: 11/24/2022] Open
Abstract
This article proposes a foaming method using supercritical carbon dioxide (scCO2) to obtain compostable bionanocomposite foams based on PLA and organoclay (C30B) where this bionanocomposite was fabricated by a previous hot melt extrusion step. Neat PLA films and PLA/C30B films (1, 2, and 3 wt.%) were obtained by using a melt extrusion process followed by a film forming process obtaining films with thicknesses between 500 and 600 μm. Films were further processed into foams in a high-pressure cell with scCO2 under constant conditions of pressure (25 MPa) and temperature (130 °C) for 30 min. Bionanocomposite PLA foams evidenced a closed cell and uniform cell structure; however, neat PLA presented a poor cell structure and thick cell walls. The thermal stability was significantly enhanced in the bionanocomposite foam samples by the good dispersion of nanoclays due to scCO2, as demonstrated by X-ray diffraction analysis. The bionanocomposite foams showed improved overall mechanical performance due to well-dispersed nanoclays promoting increased interfacial adhesion with the polymeric matrix. The water uptake behavior of bionanocomposite foams showed that they practically did not absorb water during the first week of immersion in water. Finally, PLA foams were disintegrated under standard composting conditions at higher rates than PLA films, showing their sustainable character. Thus, PLA bionanocomposite foams obtained by batch supercritical foaming seem to be a sustainable option to replace non-biodegradable expanded polystyrene, and they represent a promising alternative to be considered in applications such as food packaging and other products.
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14
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Peng K, Mubarak S, Diao X, Cai Z, Zhang C, Wang J, Wu L. Progress in the Preparation, Properties, and Applications of PLA and Its Composite Microporous Materials by Supercritical CO 2: A Review from 2020 to 2022. Polymers (Basel) 2022; 14:polym14204320. [PMID: 36297898 PMCID: PMC9611929 DOI: 10.3390/polym14204320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/22/2022] [Accepted: 10/11/2022] [Indexed: 11/16/2022] Open
Abstract
The development of degradable plastic foams is in line with the current development concept of being pollution free and sustainable. Poly(lactic acid) (PLA) microporous foam with biodegradability, good heat resistance, biocompatibility, and mechanical properties can be successfully applied in cushioning packaging, heat insulation, noise reduction, filtration and adsorption, tissue engineering, and other fields. This paper summarizes and critically evaluates the latest research on preparing PLA microporous materials by supercritical carbon dioxide (scCO2) physical foaming since 2020. This paper first introduces the scCO2 foaming technologies for PLA and its composite foams, discusses the CO2-assisted foaming processes, and analyzes the effects of process parameters on PLA foaming. After that, the paper reviews the effects of modification methods such as chemical modification, filler filling, and mixing on the rheological and crystallization behaviors of PLA and provides an in-depth analysis of the mechanism of PLA foaming behavior to provide theoretical guidance for future research on PLA foaming. Lastly, the development and applications of PLA microporous materials based on scCO2 foaming technologies are prospected.
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Affiliation(s)
- Kangming Peng
- CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Suhail Mubarak
- Department of Chemical and Biomolecular Engineering, Chonnam National University, Yeosu-si 59626, Jeonnam, Korea
| | - Xuefeng Diao
- Jinyoung (Xiamen) Advanced Materials Technology Co., Ltd., Xiamen 361028, China
| | - Zewei Cai
- CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Chen Zhang
- School of Materials and Chemistry Engineering, Minjiang University, Xiyuangong Road No. 200, Fuzhou 350108, China
- Industrial Design Institute, Minjiang University, Xiyuangong Road No. 200, Fuzhou 350108, China
- Correspondence: (C.Z.); (J.W.); (L.W.)
| | - Jianlei Wang
- CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- Correspondence: (C.Z.); (J.W.); (L.W.)
| | - Lixin Wu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- Correspondence: (C.Z.); (J.W.); (L.W.)
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15
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Wang Z, Zhang K, Wang H, Wu X, Wang H, Weng C, Li Y, Liu S, Yang J. Strengthening Interfacial Adhesion and Foamability of Immiscible Polymer Blends via Rationally Designed Reactive Macromolecular Compatibilizers. ACS APPLIED MATERIALS & INTERFACES 2022; 14:45832-45843. [PMID: 36169636 DOI: 10.1021/acsami.2c12383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Foams made of immiscible polymer blends have attracted great interest in both academia and industry, because of the integration of desirable properties of different polymers in a hybrid foam. However, the foamability and end-use properties are hampered because of the poor interfacial strength within the immiscible blends. Furthermore, few investigations have been carried out on the mechanisms by which interfacial strength and structure affect the foamability of polymer blends. In this work, two different reactive interfacial compatibilizers, i.e., poly(styrene-co-glycidyl methacrylate)-graft-poly(l-lactide) and poly(styrene-co-glycidyl methacry-late)-graft-poly(d-lactide), abbreviated as SG-g-PLLA and SG-g-PDLA, respectively, were designed and synthesized through reactive melt blending and subsequently applied to strengthen the interfacial strength and foamability of immiscible poly(butylene adipate-co-terephthalate) (PBAT)/poly(l-lactide) (PLLA) blends. Both compatibilizers could remarkably enhance the interfacial strength and foamability of the PBAT/PLLA blends, as evidenced by the significantly elongated dispersed phase in the resulting cocontinuous phase and more than 7000-fold increase in the cell density. Furthermore, the improved foamability was quantitively explained by the reduced gas diffusion and increased melt strength. Strikingly, the SG-g-PDLA introduced a stereocomplex crystal at the interface (i-SC), providing highly strengthened interfaces and nanoscale heterogeneous nucleation sites, which led to an energetically favorable cell nucleation. Moreover, foams with specifically laminated cell structures were fabricated by combining pressure-induced flow processing and i-SC strengthened interfaces. This work provides insight into the relationship between interfacial strength and formability of immiscible polymer blends and offers new possibilities for controlling cell morphologies and designing unique cell structures for polymer foams.
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Affiliation(s)
- Zhen Wang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
| | - Kailiang Zhang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
| | - Hengti Wang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Xinyu Wu
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
| | - Hanyu Wang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
| | - Chenglong Weng
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
| | - Yongjin Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Shanqiu Liu
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
| | - Jintao Yang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, P. R. China
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16
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Hua M, Chen D, Xu Z, Fang Y, Song Y. Fabrication of high‐expansion, fully degradable polylactic acid‐based foam with exponent oil/water separation. J Appl Polym Sci 2022. [DOI: 10.1002/app.53234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mengqing Hua
- Key Laboratory of Bio‐based Material Science and Technology (Ministry of Education) Northeast Forestry University Harbin China
| | - Dong Chen
- Key Laboratory of Bio‐based Material Science and Technology (Ministry of Education) Northeast Forestry University Harbin China
| | - Zesheng Xu
- Key Laboratory of Bio‐based Material Science and Technology (Ministry of Education) Northeast Forestry University Harbin China
| | - Yiqun Fang
- Key Laboratory of Bio‐based Material Science and Technology (Ministry of Education) Northeast Forestry University Harbin China
| | - Yongming Song
- Key Laboratory of Bio‐based Material Science and Technology (Ministry of Education) Northeast Forestry University Harbin China
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17
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Tang W, Liao X, Shi S, Wang B, Lv C, Zou F, Li G. Significantly Enhanced Porosity of Silicone Rubber Nanocomposite Foams via Cross-Linking Structure Regulation and Heterogeneous Nucleation by CNTs for Promising Ultralow- k Dielectrics. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wanyu Tang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xia Liao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Shaozhe Shi
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Bo Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Cuifang Lv
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Fangfang Zou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Guangxian Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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18
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Ultralight and hydrophobic PVDF/PMMA open-cell foams with outstanding heat-insulation and oil-adsorption performances fabricated by CO2 molten foaming. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102108] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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19
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Huang A, Song X, Liu F, Wang H, Geng L, Chen B, Peng X, Wang Z, Tian G. Facile preparation of anisotropic
PLA
/
CNT
nanocomposites by hot and cold rolling processes for improving mechanical and conductive properties. J Appl Polym Sci 2022. [DOI: 10.1002/app.52789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- An Huang
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Xincheng Song
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Fan Liu
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Haokun Wang
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Lihong Geng
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Binyi Chen
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Xiangfang Peng
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Zhen Wang
- Key Laboratory of Polymer Materials and Products, School of Materials Science and Engineering Fujian University of Technology Fuzhou China
| | - Genlin Tian
- Department of Biomaterials International Center for Bamboo and Rattan Beijing China
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20
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Xue G, Sun B, Han L, Liu B, Liang H, Pu Y, Tang H, Ma F. Triblock Copolymer Compatibilizers for Enhancing the Mechanical Properties of a Renewable Bio-Polymer. Polymers (Basel) 2022; 14:polym14132734. [PMID: 35808779 PMCID: PMC9269499 DOI: 10.3390/polym14132734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 06/28/2022] [Accepted: 07/01/2022] [Indexed: 12/02/2022] Open
Abstract
Poly(lactic acid) (PLA) is an emerging plastic that has insufficient properties (e.g., it is too brittle) for widespread commercial use. Previous research results have shown that the strength and toughness of basalt fiber reinforced PLA composites (PLA/BF) still need to be improved. To address this limitation, this study aimed to obtain an effective compatibilizer for PLA/BF. Melt-blending of poly(butylene adipate-co-terephthalate) (PBAT) with PLA in the presence of 4,4′-methylene diphenyl diisocyanate (MDI: 0.5 wt% of the total resin) afforded PLA/PBAT-MDI triblock copolymers. The triblock copolymers were melt-blended to improve the interfacial adhesion of PLA/BF and thus obtain excellent performance of the PLA-ternary polymers. This work presents the first investigation on the effects of PLA/PBAT-MDI triblock copolymers as compatibilizers for PLA/BF blends. The resultant mechanics, the morphology, interface, crystallinity, and thermal stability of the PLA-bio polymers were comprehensively examined via standard characterization techniques. The crystallinity of the PLA-ternary polymers was as high as 43.6%, 1.44× that of PLA/BF, and 163.5% higher than that of pure PLA. The stored energy of the PLA-ternary polymers reached 20,306.2 MPa, 5.5× than that of PLA/BF, and 18.6× of pure PLA. Moreover, the fatigue life of the PLA-ternary polymers was substantially improved, 5.85× than that of PLA/PBAT-MDI triblock copolymers. Thus, the PLA/PBAT-MDI triblock copolymers are compatibilizers that improve the mechanical properties of PLA/BF.
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Affiliation(s)
- Guilian Xue
- State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130022, China; (G.X.); (B.L.); (H.L.); (Y.P.); (F.M.)
| | - Bohua Sun
- State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130022, China; (G.X.); (B.L.); (H.L.); (Y.P.); (F.M.)
- Correspondence:
| | - Lu Han
- Changguang Jizhi Optical Technology Co., Ltd., Changchun 130022, China;
| | - Baichuan Liu
- State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130022, China; (G.X.); (B.L.); (H.L.); (Y.P.); (F.M.)
| | - Hongyu Liang
- State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130022, China; (G.X.); (B.L.); (H.L.); (Y.P.); (F.M.)
| | - Yongfeng Pu
- State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130022, China; (G.X.); (B.L.); (H.L.); (Y.P.); (F.M.)
| | - Hongming Tang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
| | - Fangwu Ma
- State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130022, China; (G.X.); (B.L.); (H.L.); (Y.P.); (F.M.)
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21
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Hu D, Xue K, Liu Z, Xu Z, Zhao L. The essential role of PBS on PBAT foaming under supercritical CO2 toward green engineering. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101965] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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22
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Guo Q, Shi D, Yang C, Wu G. Preparation of polymer-based foam for efficient oil-water separation based on surface engineering. SOFT MATTER 2022; 18:3041-3051. [PMID: 35357391 DOI: 10.1039/d2sm00230b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The leakages of a large number of organic solvents and oil spills not only cause extensive economic losses, but also destroy the ecological environment. However, there were few studies on the surface engineering of adsorption materials for efficient oil-water separation in complex environments. In this research, through surface engineering, the polymer-based foam exhibited high efficiency oil-water separation performance in different pH environments. Hydrophobic groups were introduced onto the surface of nano-sized SiO2 particles via hydrolysis and polycondensation reactions, and then the modified SiO2 was loaded on the foam. After modification, the water contact angle of the modified foam increased from 116.4° to 152.5°, and the oil-water separation performance was obviously enhanced. The oil removal rate of the modified foam remained above 96%. The highest capacity of petroleum diesel was 33.4 g-1, which was much higher than other similar adsorption materials. In addition, the modified foam maintained good hydrophobicity and oil removal rate in a wide pH range. The efficient oleophilic and hydrophobic foam prepared by combining green physical foaming with surface engineering was expected to be widely used in large-scale organic solvent recovery and oil leakage emergency treatment.
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Affiliation(s)
- Qingshi Guo
- School of Materials Science and Engineer, Hubei University, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, China.
| | - Dean Shi
- School of Materials Science and Engineer, Hubei University, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, China.
| | - Chenguang Yang
- School of Materials Science and Engineer, Hubei University, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, China.
- Key Laboratory of Textile Fiber and Products, Ministry of Education, Wuhan Textile University, Wuhan, 430200, China
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Wuhan Institute of Technology, Wuhan 430205, China
| | - Guozhong Wu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.
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23
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A Modified Porous Sponge with Selective Ability for Oil Removal from Oil-Water Mixtures. ADSORPT SCI TECHNOL 2022. [DOI: 10.1155/2022/4790592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
As oil and chemical spills pose a significant threat to the water environment, the need to develop efficient sorbent materials to remove oil and organic pollutants from water has arisen. This study aimed to develop a simple modification scheme to impart oil and water selective absorption capacity to a common three-dimensional porous material. Commercially available polyurethane sponges were used as the base material, and vinyl silica aerogel particles were loaded onto the sponges using polydimethylsiloxane as an adhesion agent. As a result, the water contact angle of the modified sponge increased from 118° to 149.2°, and the water absorption decreased from 106.5 g/g to 0.2 g/g; it could absorb oil in oil-water mixtures without absorbing water and maintain an excellent level of selective absorption ability after 20 cycles. This modification scheme is easy to operate and robust and is a scheme of practical application.
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24
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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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25
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Liu W, Wu X, Chen X, Liu S, Zhang C. Flexibly Controlling the Polycrystallinity and Improving the Foaming Behavior of Polylactic Acid via Three Strategies. ACS OMEGA 2022; 7:6248-6260. [PMID: 35224387 PMCID: PMC8867551 DOI: 10.1021/acsomega.1c06777] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
Controlling foamability plays the central role in preparing PLA foams with high performances. To achieve this, chain extension was often used to improve the rheological property of PLA resins; however, despite the availability of this approach, it often deteriorates the biodegradability of PLA and greatly increases the processing cost and complexity. Hence, we reported a special crystallization induction method to design PLA foams with a tunable cellular structure and a high expansion ratio. A novel crystallization-promoting agent combination (D-sorbitol, CO2, and phenylphosphonic acid zinc salt) was used to induce PLA to enhance the chain interaction force and chain mobility and to provide crystallization templets. A series of PLAs with tunable stereocomplex (Sc)/α crystallinity and rapid non-isothermal crystallization ability were obtained. The effect of various crystallization properties on the foaming behavior of PLA was studied. The results demonstrated that proper crystallization conditions (a small spherulite size, a crystallinity of 6%, and rapid crystallization ability) could virtually contribute to the optimized cellular structure with the highest cell density of 4.36 × 106 cell/cm3. When the Sc crystallinity was above 10%, PLA had a superior foamability, which thereby resulted in a high foaming expansion ratio of 16.2. A variety of cellular morphologies of PLA foams could be obtained by changing the foaming temperature and the crystallization property. The proposed crystallization-induced approach provided a useful method for controlling the cellular structure and the performances of the PLA foams.
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26
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Zhang L, Narita C, Himeda Y, Honma H, Yamada K. Development of highly oil-absorbent polylactic-acid microfibers with a nanoporous structure via simple one-step centrifugal spinning. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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27
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Development of advanced floating poly(lactic acid)-based materials for colored wastewater treatment. J Supercrit Fluids 2021. [DOI: 10.1016/j.supflu.2021.105328] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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28
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Preparation of Microcellular Foams by Supercritical Carbon Dioxide: A Case Study of Thermoplastic Polyurethane 70A. Processes (Basel) 2021. [DOI: 10.3390/pr9091650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, a case study to produce microcellular foam of a commercial thermoplastic polyurethane (TPU) through the supercritical carbon dioxide (CO2) foaming process is presented. To explore the feasibility of TPU in medical device and biomedical application, a soft TPU with Shore hardness value of 70A was selected as the model compound. The effects of saturation temperature and saturation pressure ranging from 90 to 140 °C and 90 to 110 bar on the expansion ratio, cell size and cell density of the TPU foam were compared and discussed. Regarding the expansion ratio, the effect of saturation temperature was considerable and an intermediate saturation temperature of 100 °C was favorable to produce TPU microcellular foam with a high expansion ratio. On the other hand, the mean pore size and cell density of TPU foam can be efficiently manipulated by adjusting the saturation pressure. A high saturation pressure was beneficial to obtain TPU foam with small mean pore size and high cell density. This case study shows that the expansion ratio of TPU microcellular foam could be designed as high as 4.4. The cell size and cell density could be controlled within 12–40 μm and 5.0 × 107–1.3 × 109 cells/cm3, respectively.
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29
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Hoang AT, Nižetić S, Duong XQ, Rowinski L, Nguyen XP. Advanced super-hydrophobic polymer-based porous absorbents for the treatment of oil-polluted water. CHEMOSPHERE 2021; 277:130274. [PMID: 33770690 DOI: 10.1016/j.chemosphere.2021.130274] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
The threat of environmental pollution caused by spilled oil is rapidly increasing along with the expansion of oil exploration, the development of maritime activities and industrial growth. Oil spill incidents usually affect seriously the ecosystem and human life. Therefore, the treatment and recovery of the oil spill have been considered as an ultra-important issue to protect the environment and to minimize its negative impacts on socio-economic activities. Among methods of oil spill recovery, porous materials have emerged as potential absorbents possessing the capacity of absorbing spilled oil at a fast rate, high adsorption capacity, good selectivity, and high reusability. In this review paper, two types of polymer-based porous absorbents modified surface and structure were introduced for the treatment strategy of the oil-polluted water. In addition, the absorption mechanism and factors affecting the adsorption capacity for oils and organic solvents were thoroughly analyzed. More importantly, characteristics of polymer-based porous materials were discussed in detail based on microstructure analysis, absorption efficiency, and reusability. In general, this paper has provided an overview and a comprehensive assessment of the use of advanced polymer-based porous materials for the treatment of oil-polluted water, although the impacts of environmental factors such as wind, wave, and temperature should be further investigated in the future.
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Affiliation(s)
- Anh Tuan Hoang
- Institute of Engineering, Ho Chi Minh city University of Technology (HUTECH), Ho Chi Minh city, Viet Nam.
| | | | - Xuan Quang Duong
- Department of Mechanical Engineering, Vietnam Maritime University, Haiphong, Viet Nam
| | - Lech Rowinski
- Institute of Naval Architecture and Ocean Engineering, Gdansk University of Technology, Poland
| | - Xuan Phuong Nguyen
- Institute of Maritime, Ho Chi Minh city University of Transport, Ho Chi Minh city, Viet Nam.
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