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Parale VG, Kim T, Choi H, Phadtare VD, Dhavale RP, Kanamori K, Park HH. Mechanically Strengthened Aerogels through Multiscale, Multicompositional, and Multidimensional Approaches: A Review. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307772. [PMID: 37916304 DOI: 10.1002/adma.202307772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/29/2023] [Indexed: 11/03/2023]
Abstract
In recent decades, aerogels have attracted tremendous attention in academia and industry as a class of lightweight and porous multifunctional nanomaterial. Despite their wide application range, the low mechanical durability hinders their processing and handling, particularly in applications requiring complex physical structures. "Mechanically strengthened aerogels" have emerged as a potential solution to address this drawback. Since the first report on aerogels in 1931, various modified synthesis processes have been introduced in the last few decades to enhance the aerogel mechanical strength, further advancing their multifunctional scope. This review summarizes the state-of-the-art developments of mechanically strengthened aerogels through multicompositional and multidimensional approaches. Furthermore, new trends and future directions for as prevailed commercialization of aerogels as plastic materials are discussed.
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Affiliation(s)
- Vinayak G Parale
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
| | - Taehee Kim
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
| | - Haryeong Choi
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
| | - Varsha D Phadtare
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
| | - Rushikesh P Dhavale
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
| | - Kazuyoshi Kanamori
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan
| | - Hyung-Ho Park
- Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, South Korea
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2
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Fijalkowski M, Ali A, Qamer S, Coufal R, Adach K, Petrik S. Hybrid and Single-Component Flexible Aerogels for Biomedical Applications: A Review. Gels 2023; 10:4. [PMID: 38275842 PMCID: PMC10815221 DOI: 10.3390/gels10010004] [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: 11/03/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 01/27/2024] Open
Abstract
The inherent disadvantages of traditional non-flexible aerogels, such as high fragility and moisture sensitivity, severely restrict their applications. To address these issues and make the aerogels efficient, especially for advanced medical applications, different techniques have been used to incorporate flexibility in aerogel materials. In recent years, a great boom in flexible aerogels has been observed, which has enabled them to be used in high-tech biomedical applications. The current study comprises a comprehensive review of the preparation techniques of pure polymeric-based hybrid and single-component aerogels and their use in biomedical applications. The biomedical applications of these hybrid aerogels will also be reviewed and discussed, where the flexible polymeric components in the aerogels provide the main contribution. The combination of highly controlled porosity, large internal surfaces, flexibility, and the ability to conform into 3D interconnected structures support versatile properties, which are required for numerous potential medical applications such as tissue engineering; drug delivery reservoir systems; biomedical implants like heart stents, pacemakers, and artificial heart valves; disease diagnosis; and the development of antibacterial materials. The present review also explores the different mechanical, chemical, and physical properties in numerical values, which are most wanted for the fabrication of different materials used in the biomedical fields.
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Affiliation(s)
- Mateusz Fijalkowski
- Department of Advanced Materials, Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec, 461 17 Liberec, Czech Republic
| | - Azam Ali
- Department of Material Science, Technical University of Liberec, 461 17 Liberec, Czech Republic
| | - Shafqat Qamer
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia
| | - Radek Coufal
- Department of Science and Research, Faulty of Health Studies, Technical University of Liberec, 461 17 Liberec, Czech Republic
| | - Kinga Adach
- Department of Advanced Materials, Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec, 461 17 Liberec, Czech Republic
| | - Stanislav Petrik
- Department of Advanced Materials, Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec, 461 17 Liberec, Czech Republic
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3
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Sozcu S, Venkataraman M, Wiener J, Tomkova B, Militky J, Mahmood A. Incorporation of Cellulose-Based Aerogels into Textile Structures. MATERIALS (BASEL, SWITZERLAND) 2023; 17:27. [PMID: 38203881 PMCID: PMC10779952 DOI: 10.3390/ma17010027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 01/12/2024]
Abstract
Given their exceptional attributes, aerogels are viewed as a material with immense potential. Being a natural polymer, cellulose offers the advantage of being both replenishable and capable of breaking down naturally. Cellulose-derived aerogels encompass the replenish ability, biocompatible nature, and ability to degrade naturally inherent in cellulose, along with additional benefits like minimal weight, extensive porosity, and expansive specific surface area. Even with increasing appreciation and acceptance, the undiscovered possibilities of aerogels within the textiles sphere continue to be predominantly uninvestigated. In this context, we outline the latest advancements in the study of cellulose aerogels' formulation and their diverse impacts on textile formations. Drawing from the latest studies, we reviewed the materials used for the creation of various kinds of cellulose-focused aerogels and their properties, analytical techniques, and multiple functionalities in relation to textiles. This comprehensive analysis extensively covers the diverse strategies employed to enhance the multifunctionality of cellulose-based aerogels in the textiles industry. Additionally, we focused on the global market size of bio-derivative aerogels, companies in the industry producing goods, and prospects moving forward.
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Affiliation(s)
- Sebnem Sozcu
- Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 46117 Liberec, Czech Republic; (J.W.); (B.T.); (J.M.); (A.M.)
| | - Mohanapriya Venkataraman
- Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 46117 Liberec, Czech Republic; (J.W.); (B.T.); (J.M.); (A.M.)
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4
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Fijalkowski M, Coufal R, Ali A, Adach K, Petrik S, Bu H, Karl CW. Flexible Hybrid and Single-Component Aerogels: Synthesis, Characterization, and Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16760-16775. [PMID: 37955990 PMCID: PMC10688192 DOI: 10.1021/acs.langmuir.3c01811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 10/14/2023] [Accepted: 10/16/2023] [Indexed: 11/15/2023]
Abstract
The inherent disadvantages of traditional nonflexible aerogels, such as high fragility and moisture sensitivity, severely restrict their applications. To address these issues, different techniques have been used to incorporate the flexibility in aerogel materials; hence, the term "flexible aerogels" was introduced. In the case of introducing flexibility, the organic part is induced with the inorganic part (flexible hybrid aerogels). Additionally, some more modern research is also available in the fabrication of hybrid flexible aerogels (based on organic-organic), the combination of two organic polymers. Moreover, a new type (single-component flexible aerogels) are quite a new category composed of only single materials; this category is very limited, charming to make the flexible aerogels pure from single polymers. The present review is composed of modern techniques and studies available to fabricate hybrid and single-component flexible aerogels. Their synthesis, factors affecting their parameters, and limitations associated with them are explained deeply. Moreover, a comparative analysis of drying methods and their effectiveness in the development of structures are described in detail. The further sections explain their properties and characterization methods. Eventually, their applications in a variety of multifunctional fields are covered. This article will support to introduce the roadmap pointing to a future direction in the production of the single-component flexible aerogel materials and their applications.
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Affiliation(s)
- Mateusz Fijalkowski
- Department
of Advanced Materials, Institute for Nanomaterials, Advanced Technologies
and Innovation (CXI), Technical University
of Liberec, 461 17 Liberec, Czech Republic
| | - Radek Coufal
- Department
of Science and Research, Faculty of Health Studies, Technical University of Liberec, 461 17 Liberec, Czech Republic
| | - Azam Ali
- Department
of Material Sciences, Technical University
of Liberec, 461 17 Liberec, Czech Republic
| | - Kinga Adach
- Department
of Advanced Materials, Institute for Nanomaterials, Advanced Technologies
and Innovation (CXI), Technical University
of Liberec, 461 17 Liberec, Czech Republic
| | - Stanislav Petrik
- Department
of Advanced Materials, Institute for Nanomaterials, Advanced Technologies
and Innovation (CXI), Technical University
of Liberec, 461 17 Liberec, Czech Republic
| | - Huaitian Bu
- Department
of Materials and Nanotechnology, SINTEF
Industry, Forskningsveien 1, 0373 Oslo, Norway
| | - Christian W. Karl
- Department
of Materials and Nanotechnology, SINTEF
Industry, Forskningsveien 1, 0373 Oslo, Norway
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5
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Sun J, Zhuo S, Zhang R. Highly Transparent, Temperature-Resistant, and Flexible Polyimide Aerogels for Solar Energy Collection. ACS APPLIED MATERIALS & INTERFACES 2023; 15:37957-37965. [PMID: 37525431 DOI: 10.1021/acsami.3c07720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Advanced aerogel materials with low thermal conductivity and high transparency have shown great application prospects in the solar thermal energy conversion field. However, most aerogels do not meet these requirements due to their low optical transparency and poor mechanical properties. To tackle this problem, we have created versatile polyimide (PI) aerogel materials by adjusting the monomers to alter their molecular structure. These materials exhibit exceptional thermal insulation properties and high transparency, making them ideal for use in the construction of efficient solar collector devices. Incorporating 1,3,5-benzenetricarbonyl trichloride into PI aerogel results in high strength (>3 MPa) and excellent transmittance (>90%) over a broad range of wavelengths (500-2650 nm). The as-prepared PI aerogel solar collector (PIASC) also exhibits a low thermal conductivity (0.032 W/mK), a low density (0.1 g/cm3), and high porosity (90%). By changing the shape of the collector from a flat plate to a cylindrical ring, the heat collection efficiency and capacity are significantly improved, resulting in efficient heat collection. The circular ring collector has a maximum heat collection temperature of 236.8 °C. The PIASC, which is both flexible and highly transparent, is an ideal candidate for advanced optical elements and solar collectors.
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Affiliation(s)
- Jiancheng Sun
- Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China
| | - Shijin Zhuo
- China Academy of Launch Technology, Beijing 100076, China
| | - Rubing Zhang
- Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China
- Tangshan Research Institute of Beijing Jiaotong University, Tangshan 063000, China
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6
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Zhu Y, Haghniaz R, Hartel MC, Guan S, Bahari J, Li Z, Baidya A, Cao K, Gao X, Li J, Wu Z, Cheng X, Li B, Emaminejad S, Weiss PS, Khademhosseini A. A Breathable, Passive-Cooling, Non-Inflammatory, and Biodegradable Aerogel Electronic Skin for Wearable Physical-Electrophysiological-Chemical Analysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209300. [PMID: 36576895 PMCID: PMC10006339 DOI: 10.1002/adma.202209300] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Real-time monitoring of human health can be significantly improved by designing novel electronic skin (E-skin) platforms that mimic the characteristics and sensitivity of human skin. A high-quality E-skin platform that can simultaneously monitor multiple physiological and metabolic biomarkers without introducing skin discomfort or irritation is an unmet medical need. Conventional E-skins are either monofunctional or made from elastomeric films that do not include key synergistic features of natural skin, such as multi-sensing, breathability, and thermal management capabilities in a single patch. Herein, a biocompatible and biodegradable E-skin patch based on flexible gelatin methacryloyl aerogel (FGA) for non-invasive and continuous monitoring of multiple biomarkers of interest is engineered and demonstrated. Taking advantage of cryogenic temperature treatment and slow polymerization, FGA is fabricated with a highly interconnected porous structure that displays good flexibility, passive-cooling capabilities, and ultra-lightweight properties that make it comfortable to wear for long periods of time. It also provides numerous permeable capillary channels for thermal-moisture transfer, ensuring its excellent breathability. Therefore, the engineered FGA-based E-skin can simultaneously monitor body temperature, hydration, and biopotentials via electrophysiological sensors and detect glucose, lactate, and alcohol levels via electrochemical sensors. This work offers a previously unexplored materials strategy for next-generation E-skin platforms with superior practicality.
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Affiliation(s)
- Yangzhi Zhu
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
| | - Reihaneh Haghniaz
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
| | - Martin C Hartel
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Shenghan Guan
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
- Mork Family Department of Chemical Engineering & Materials Science, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, 90007, USA
| | - Jamal Bahari
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
| | - Zijie Li
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
- Mork Family Department of Chemical Engineering & Materials Science, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, 90007, USA
| | - Avijit Baidya
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ke Cao
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Xiaoxiang Gao
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Jinghang Li
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
| | - Zhuohong Wu
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Xuanbing Cheng
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Bingbing Li
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
- Department of Manufacturing Systems Engineering and Management, California State University Northridge, Northridge, CA, 91330, USA
| | - Sam Emaminejad
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Paul S Weiss
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Chemistry and Biochemistry, Department of Materials Science and Engineering and California NanoSystems Institute, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
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7
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Dayarian S, Majedi Far H, Yang L. Macroporous Polyimide Aerogels: A Comparison between Powder Microparticles Synthesized via Wet Gel Grinding and Emulsion Processes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1804-1814. [PMID: 36706272 PMCID: PMC9910053 DOI: 10.1021/acs.langmuir.2c02696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 01/14/2023] [Indexed: 06/18/2023]
Abstract
It is noteworthy to mention that synthesizing the polyimide aerogel powder, which is carried out in this study, benefits from two advantages: (i) the powder particles can be used for some specific applications where the monolith is not suitable and (ii) there is a possibility to investigate how a polyimide aerogel monolith can be made through the polyimide powder to reduce its cost and cycle time. In this study, two straightforward methods, wet gel grinding and emulsion, are introduced to prepare polyimide aerogel powders using ambient pressure drying. The microscopic properties of interest, including skeletal and porous structures, microparticle size and assembly, combined with macroscopic properties such as thermal stabilities and conductivities (0.039 W/m·K), confirm that the fabricated microparticles with a size in the range of 7-20 μm and porosity in the range of 65-85% are thermally stable up to 500 °C.
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Affiliation(s)
- Shima Dayarian
- Department
of Mechanical and Aerospace Engineering, University of Strathclyde, 75 Montrose Street, GlasgowG1 1XJ, United
Kingdom
| | - Hojat Majedi Far
- Blueshift
Materials Inc., Spencer, Massachusetts01562, United States
| | - Liu Yang
- Department
of Mechanical and Aerospace Engineering, University of Strathclyde, 75 Montrose Street, GlasgowG1 1XJ, United
Kingdom
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8
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Wang C, Eisenreich F, Tomović Ž. Closed-Loop Recyclable High-Performance Polyimine Aerogels Derived from Bio-Based Resources. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209003. [PMID: 36495005 DOI: 10.1002/adma.202209003] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Organic aerogels are an intriguing class of highly porous and ultralight materials which have found widespread applications in thermal insulation, energy storage, and chemical absorption. These fully cross-linked polymeric networks, however, pose environmental concerns as they are typically made from fossil-based feedstock and the recycling back to their original monomers is virtually impossible. In addition, organic aerogels suffer from low thermal stability and potential fire hazard. To overcome these obstacles and create next-generation organic aerogels, a set of polyimine aerogels containing reversible chemical bonds which can selectively be cleaved on demand is prepared. As precursors, different primary amines and cyclophosphazene derivatives made from bio-based reagents (vanillin and 4-hydroxybenzaldehyde) to elevate the thermal stability and reduce the environmental impact are used. The resulting polyimine aerogels exhibit low shrinkage, high porosity, large surface area, as well as pronounced thermal stability and flame resistance. More importantly, the aerogels show excellent recyclability under acidic conditions with high monomer recovery yields and purities. This approach allows for preparation of fresh aerogels from the retrieved building blocks, thus demonstrating efficient closed-loop recycling. These high-performance, recyclable, and bio-based polyimine aerogels pave the way for advanced and sustainable superinsulating materials.
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Affiliation(s)
- Changlin Wang
- Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, MB, 5600, The Netherlands
| | - Fabian Eisenreich
- Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, MB, 5600, The Netherlands
| | - Željko Tomović
- Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, MB, 5600, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, MB, 5600, The Netherlands
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9
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Hu P, Wang J, Zhang P, Wu F, Cheng Y, Wang J, Sun Z. Hyperelastic Kevlar Nanofiber Aerogels as Robust Thermal Switches for Smart Thermal Management. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2207638. [PMID: 36271721 DOI: 10.1002/adma.202207638] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Aerogels, the lightest artificial solid materials characterized by low density and thermal conductivity, high porosity, and large specific surface area, have attracted increasing interest. Aerogels exhibit single-mode thermal insulation properties regardless of the surrounding temperature. In this study, hyperelastic Kevlar nanofiber aerogels (HEKAs) are designed and fabricated by a slow-proton-release-modulating gelation and thermoinduced crosslinking strategy. The method does not use crosslinking agents and endows the ultralow-density (4.7 mg cm-3 ) HEKAs with low thermal conductivity (0.029 W m-1 K-1 ), high porosity (99.75%), high thermal stability (550 °C), and increased compression resilience (80%) and fatigue resistance. Proofs of the concept of the HEKAs acting as on-off thermal switches are demonstrated through experiments and simulations. The thermal switches exhibit a rapid thermal response speed of 0.73 °C s-1 , high heat flux of 2044 J m-2 s-1 , and switching ratio of 7.5. Heat dissipation can be reversibly switched on/off more than fifty times owing to the hyperelasticity and fatigue resistance of the HEKAs. This study suggests a route to fulfill the hyperelasticity of highly porous aerogels and to tailor heat flux on-demand.
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Affiliation(s)
- Peiying Hu
- Key Laboratory of Advanced Metallic Materials of Jiangsu Province, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Jing Wang
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Peigen Zhang
- Key Laboratory of Advanced Metallic Materials of Jiangsu Province, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Fushuo Wu
- Key Laboratory of Advanced Metallic Materials of Jiangsu Province, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
| | - Yingying Cheng
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Jin Wang
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - ZhengMing Sun
- Key Laboratory of Advanced Metallic Materials of Jiangsu Province, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China
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10
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Auto-Continuous Synthesis of Robust and Hydrophobic Silica Aerogel Microspheres from Low-Cost Aqueous Sodium Silicate for Fast Dynamic Organics Removal. Gels 2022; 8:gels8120778. [PMID: 36547303 PMCID: PMC9777793 DOI: 10.3390/gels8120778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/24/2022] [Accepted: 11/25/2022] [Indexed: 12/03/2022] Open
Abstract
An efficient auto-continuous globing process was developed with a self-built apparatus to synthesize pure silica aerogel microspheres (PSAMs) using sodium silicate as a precursor and water as a solvent. A hydrophobic silica aerogel microsphere (HSAM) was obtained by methyl grafting. A reinforced silica aerogel microsphere (RSAM) was prepared by polymer cross-linking on the framework of the silica gel. The pH value of the reaction system and the temperature of the coagulating bath were critical to form perfect SAMs with a diameter of 3.0 ± 0.2 mm. The grafted methyl groups are thermally stable up to 400 °C. Polymer cross-linking increased the strength significantly, owing to the polymer coating on the framework of silica aerogel. The pore volumes of HSAM (6.44 cm3/g) and RSAM (3.17 cm3/g) were much higher than their state-of-the-art counterparts. Their specific surface areas were also at a high level. The HSAM and RSAM showed high organic sorption capacities, i.e., 17.9 g/g of pump oil, 11.8 g/g of hexane, and 22.2 mg/g of 10 mg/L methyl orange. The novel preparation method was facile, cost-effective, safe, and eco-friendly, and the resulting SAM sorbents were exceptional in capacity, dynamics, regenerability, and stability.
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11
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Zheng S, Jiang L, Chang F, Zhang C, Ma N, Liu X. Mechanically Strong and Thermally Stable Chemical Cross-Linked Polyimide Aerogels for Thermal Insulator. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50129-50141. [PMID: 36308398 DOI: 10.1021/acsami.2c14007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
High-performance thermal insulating materials are highly desirable in several fields, especially for thermal insulation of buildings to reduce energy consumption. Owing to the remarkable thermal stability, high porosity, low density, and outstanding mechanical features, polyimide (PI) aerogels have attracted great attention. In this work, chemical cross-linked PI (CCPI) aerogels were fabricated via freeze-drying and thermal imidization, which possess outstanding mechanical properties, good thermal stability, and excellent thermal insulation characteristics. The chemically cross-linked structure can effectively inhibit shrinkage, while retaining the structural integrity, resulting in the lower density and lower shrinkage of the materials. In this paper, completely imidized and highly cross-linked polyimide aerogels were synthesized by using p-phenylenediamine (PDA), 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), and the cross-linker 2,3,6,7,14,15-hexaaminotriptycene (HMT). The CCPI aerogels with excellent properties, such as covalently cross-linked chemical structure, low density (0.069 g/cm3), low volume shrinkage (10%), high decomposition temperature (Td5% = 587 °C), and low thermal conductivity (25 mW m-1K-1) are in high demand in the field of thermal insulation. This work furnishes a new method for the development of polymer-based thermal insulation materials for various prospective applications.
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Affiliation(s)
- Shuai Zheng
- School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China150001
- Institute of System Engineering, Beijing, China100010
| | - Lei Jiang
- School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China150001
- Institute of System Engineering, Beijing, China100010
| | - Fan Chang
- School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China150001
- Institute of System Engineering, Beijing, China100010
| | - Changqi Zhang
- Institute of System Engineering, Beijing, China100010
| | - Ning Ma
- School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, China150001
| | - Xueqiang Liu
- Institute of System Engineering, Beijing, China100010
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12
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Mu B, Yu Z, Cui J, Yan W, He H, Wang X, Guo J, Tian L, Yang B, Cui J. Tribological Properties of Oil-Containing Polyimide Aerogels as a New Type of Porous Self-Lubricating Material. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bo Mu
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Zhenghong Yu
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Jianbing Cui
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Wenrui Yan
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Huan He
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Xia Wang
- School of Chemical Engineering, Northwest Minzu University, Lanzhou, Gansu 730030, China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Junhong Guo
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Li Tian
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Baoping Yang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
| | - Jinfeng Cui
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, People’s Republic of China
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13
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Kaplin V, Kopylov A, Koryakovtseva A, Minaev N, Epifanov E, Gulin A, Aksenova N, Timashev P, Kuryanova A, Shershnev I, Solovieva A. Features of Luminescent Properties of Alginate Aerogels with Rare Earth Elements as Photoactive Cross-Linking Agents. Gels 2022; 8:617. [PMID: 36286117 PMCID: PMC9602161 DOI: 10.3390/gels8100617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 10/28/2023] Open
Abstract
Luminescent aerogels based on sodium alginate cross-linked with ions of rare earth elements (Eu3+, Tb3+, Sm3+) and containing phenanthroline, thenoyltrifluoroacetone, dibenzoylmethane, and acetylacetone as ligands introduced into the matrix during the impregnation of alginate aerogels (AEG), were obtained for the first time in a supercritical carbon dioxide medium. The impregnation method used made it possible to introduce organically soluble sensitizing ligands into polysaccharide matrices over the entire thickness of the sample while maintaining the porous structure of the aerogel. It is shown that the pore size and their specific area are 150 nm and 270 m2/g, respectively. Moreover, metal ions with content of about 23 wt.%, acting as cross-linking agents, are uniformly distributed over the thickness of the sample. In addition, the effect of sensitizing ligands on the luminescence intensity of cross-linked aerogel matrices is considered. The interaction in the resulting metal/ligand systems is unique for each pair, which is confirmed by the detection of broad bands with individual positions in the luminescence excitation spectra of photoactive aerogels.
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Affiliation(s)
- Vladislav Kaplin
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Aleksandr Kopylov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
- Institute of Fine Chemical Technologies, Russian Technological University, 119571 Moscow, Russia
| | - Anastasiia Koryakovtseva
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Nikita Minaev
- Federal Research Centre “Crystallography and Photonics”, Institute of Photonic Technologies, Russian Academy of Sciences, Troitsk, 108840 Moscow, Russia
| | - Evgenii Epifanov
- Federal Research Centre “Crystallography and Photonics”, Institute of Photonic Technologies, Russian Academy of Sciences, Troitsk, 108840 Moscow, Russia
| | - Aleksandr Gulin
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Nadejda Aksenova
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
- Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Peter Timashev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
- Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Anastasiia Kuryanova
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Ilya Shershnev
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Anna Solovieva
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
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14
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Guo Y, Qin S, Yao X, Liu S, Ji Z, Ma Z, Wang X. Preparation of polyimide aerogels by freeze‐extraction and chemical imidization for 3D printing. J Appl Polym Sci 2022. [DOI: 10.1002/app.52891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuxiong Guo
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
| | - Shiyu Qin
- School of Chemistry and Chemical Engineering Shihezi University Shihezi China
| | - Xinle Yao
- School of Chemical Engineering Northwest Minzu University Lanzhou China
| | - Sen Liu
- School of Chemical Engineering Northwest Minzu University Lanzhou China
| | - Zhongying Ji
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai China
| | - Zhengfeng Ma
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai China
| | - Xiaolong Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China
- Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai China
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15
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Gao Y, Dong C, Zhang F, Leng X, Li Y. The synthesis, characterization and carbon dioxide adsorption of polyimide aerogels containing Tröger’s base units. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221115567] [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]
Abstract
Microporous polymers with uniform pores and large specific surface areas have been extensively studied in the field of CO2 adsorption and separation. However, the synthesis of these microporous materials is quite complex and difficult to achieve large-scale production and application. In this study, we have successfully synthesized a novel mesoporous polyimide aerogel containing Tröger’s base using a facile and mild method at room temperature. Thermal decomposition temperature of the obtained polyimide aerogels was above 420°C, which exhibited outstanding thermal stability. The maximum adsorption capacity of CO2 is 24.08 cm3/g. The high CO2 adsorptions are attributed to the abundance of nitrogen-rich heteroatoms in the polyimide networks. The mild and convenient preparation method and high CO2 adsorptive capacity indicate that the mesoporous polyimide aerogels with Tröger’s base can also be suitable as an adsorbent for CO2 capture in industrial applications.
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Affiliation(s)
- Yangfeng Gao
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China
| | - Chao Dong
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China
| | - Fan Zhang
- Weifang Hongrun New Materials Co., Ltd, Weifang, China
| | - Xuefei Leng
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China
| | - Yang Li
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China
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16
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Ghaffari-Mosanenzadeh S, Aghababaei Tafreshi O, Karamikamkar S, Saadatnia Z, Rad E, Meysami M, Naguib HE. Recent advances in tailoring and improving the properties of polyimide aerogels and their application. Adv Colloid Interface Sci 2022; 304:102646. [PMID: 35378358 DOI: 10.1016/j.cis.2022.102646] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 02/22/2022] [Accepted: 03/17/2022] [Indexed: 11/28/2022]
Abstract
With the rapid advancements in technology and growing aerospace applications, there is a need for effective low-weight and thermally insulating materials. Aerogels are known for their ultra-lightweight and they are highly porous materials with nanopores in a range of 2 to 50 nm with very low thermal conductivity values. However, due to hygroscopic nature and brittleness, aerogels are not used commercially and in daily life. To enhance the mechanical and hydrophobic properties, reinforcement materials such as styrene, cyanoacrylates, epoxy along with hydroxyl, amines, vinyl groups are added to the surface. The addition of organic materials resulted in lower service temperatures which reduce its potential applications. Polyimides (PI) are commonly used in engine applications due to their suitable stability at high temperatures along with excellent mechanical properties. Previous research on polyimide aerogels reported high flexibility or even foldability. However, those works' strategy was mainly limited to altering the backbone chemistry of polyimide aerogels by changing either the monomer's compositions or the chemical crosslinker. This work aims to summarize, categorize, and highlight the recent techniques for improving and tailoring properties of polyimide aerogels followed by the recent advancements in their applications.
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Affiliation(s)
| | | | - Solmaz Karamikamkar
- Department of Mechanical and Industrial Engineering, University of Toronto, Canada
| | - Zia Saadatnia
- Department of Mechanical and Industrial Engineering, University of Toronto, Canada
| | - Elmira Rad
- BASF Corporation, 450 Clark Drive, Budd Lake, NJ 07828, United States
| | - Mohammad Meysami
- BASF Corporation, 450 Clark Drive, Budd Lake, NJ 07828, United States
| | - Hani E Naguib
- Department of Mechanical and Industrial Engineering, University of Toronto, Canada; Department of Materials Science and Engineering, University of Toronto, Canada.
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17
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Gao Y, Dong C, Zhang F, Ma H, Li Y. Low cross‐linked polyimide aerogel with imidazole for
CO
2
adsorption. J Appl Polym Sci 2022. [DOI: 10.1002/app.52681] [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)
- Yangfeng Gao
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian China
| | - Chao Dong
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian China
| | - Fan Zhang
- Weifang Hongrun New Materials Co., Ltd Weifang China
| | - Hongwei Ma
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian China
| | - Yang Li
- School of Chemical Engineering, State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian China
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18
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Gao Y, Dong C, Zhang F, Ma H, Li Y. Carboxy-functionalized polyimide aerogel monoliths: synthesis, characterization and carbon dioxide adsorption. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04242-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Song S, Shi Y, Tan J, Wu Z, Zhang M, Qiang S, Nie J, Liu H. An efficient approach to fabricate lightweight polyimide/aramid sponge with excellent heat insulation and sound absorption performance. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.02.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Mohan T, Ajdnik U, Nagaraj C, Lackner F, Dobaj Štiglic A, Palani T, Amornkitbamrung L, Gradišnik L, Maver U, Kargl R, Stana Kleinschek K. One-Step Fabrication of Hollow Spherical Cellulose Beads: Application in pH-Responsive Therapeutic Delivery. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3726-3739. [PMID: 35014252 PMCID: PMC8796171 DOI: 10.1021/acsami.1c19577] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 12/29/2021] [Indexed: 05/16/2023]
Abstract
The path to greater sustainability and the development of polymeric drug delivery systems requires innovative approaches. The adaptation and use of biobased materials for applications such as targeted therapeutic delivery is, therefore, in high demand. A crucial part of this relates to the development of porous and hollow structures that are biocompatible, pH-responsive, deliver active substances, and contribute to pain relief, wound healing, tissue regeneration, and so forth. In this study, we developed a facile single-step and water-based method for the fabrication of hollow spherical cellulose beads for targeted drug release in response to external pH stimuli. Through base-catalyzed deprotection, hydrophobic solid and spherical cellulose acetate beads are transformed into hydrophilic cellulose structures with a hollow interior (wall thickness: 150 μm and inner diameter: 650 μm) by a stepwise increment of temperature and treatment time. Besides the pH-responsive fluid uptake properties, the hollow cellulose structures exhibit a maximum encapsulation efficiency of 20-85% diclofenac (DCF), a nonsteroidal anti-inflammatory drug, used commonly to treat pain and inflammatory diseases. The maximum amount of DCF released in vitro increased from 20 to 100% when the pH of the release medium increased from pH 1.2 to 7.4. As for the DCF release patterns and kinetic models at specific pH values, the release showed a diffusion- and swelling-controlled profile, effortlessly fine-tuned by external environmental pH stimuli. Overall, we show that the modified beads exhibit excellent characteristics for transport across the gastrointestinal tract and enhance the bioavailability of the drug. Their therapeutic efficacy and biocompatibility are also evident from the studies on human fibroblast cells. We anticipate that this platform could support and inspire the development of novel sustainable and effective polysaccharide-based delivery systems.
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Affiliation(s)
- Tamilselvan Mohan
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Urban Ajdnik
- Faculty
of Mechanical Engineering, Institute of Engineering Materials and
Design, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Chandran Nagaraj
- Ludwig
Boltzmann Institute for Lung Vascular Research, Stiftingtalstrasse 24, 8010 Graz, Austria
| | - Florian Lackner
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Andreja Dobaj Štiglic
- Faculty
of Mechanical Engineering, Institute of Engineering Materials and
Design, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Thirvengadam Palani
- School
of Chemistry and Chemical Engineering and State Key Laboratory of
Metal Matrix Composites, Shanghai Jiao Tong
University, 800 Dongchuan
Road, Shanghai 200240, China
| | - Lunjakorn Amornkitbamrung
- Faculty
of Engineering, Department of Chemical Engineering Research Unit in
Polymeric Materials for Medical Practice Devices, Chulalongkorn University, 254 Phayathai Rd, Bangkok 10330, Thailand
| | - Lidija Gradišnik
- Faculty of
Medicine, Department of Pharmacology, University
of Maribor, Taborska
ulica 8, 2000 Maribor, Slovenia
| | - Uroš Maver
- Faculty of
Medicine, Department of Pharmacology, University
of Maribor, Taborska
ulica 8, 2000 Maribor, Slovenia
| | - Rupert Kargl
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Karin Stana Kleinschek
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
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21
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Gao Y, Dong C, Zhang F, Ma H, Li Y. Constructing Polyimide Aerogels with Carboxyl for CO 2 Adsorption. Polymers (Basel) 2022; 14:polym14030359. [PMID: 35160349 PMCID: PMC8840088 DOI: 10.3390/polym14030359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 12/10/2022] Open
Abstract
In this study, mesoporous polyimide aerogels with carboxyl were successfully synthesized by the co-polymerization method at room temperature from pyromellitic dianhydride and 1,3,5-triaminophenoxybenzene, 3,5-diaminobenzoic acid, and 2,2′-dimethyl-4,4′-diaminobiphenyl. Compared to previously reported porous organic polymer materials, this aerogel has the advantage of a simple and efficient synthesis method. The thermal decomposition temperatures of the obtained polyimide aerogels are all above 400 °C and have excellent thermal stability. Among them, the largest specific surface area is 62.03 m2/g. Although the surface area of this aerogel is not large enough, it has considerable CO2 adsorption properties. The adsorption capacity of CO2 is up to 11.9 cm3/g, which is comparable to those of previously reported porous materials. The high CO2 adsorption is attributed to the abundance of carboxyl groups in the polyimide networks. The mild and convenient synthesis method and high CO2 adsorption capacity indicate that the polyimide aerogel with carboxyl is suitable as a good candidate material for CO2 adsorption.
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Affiliation(s)
- Yangfeng Gao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China; (Y.G.); (C.D.)
| | - Chao Dong
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China; (Y.G.); (C.D.)
| | - Fan Zhang
- Weifang Hongrun New Materials Co., Ltd., Weifang 261108, China;
| | - Hongwei Ma
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China; (Y.G.); (C.D.)
- Correspondence: (H.M.); (Y.L.)
| | - Yang Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China; (Y.G.); (C.D.)
- Correspondence: (H.M.); (Y.L.)
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22
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Zheng S, Jiang L, Zhang C, Ma N, Liu X. Facile and environment-friendly preparation of high-performance polyimide aerogels using water as the only solvent. Polym Chem 2022. [DOI: 10.1039/d1py01573g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study described a facile and environmentally friendly method for preparing polyimide (PI) aerogels via sol-gel process and freeze-drying without the use of organic solvents. The prepared PI aerogels showed...
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23
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Reduced shrinkage and mechanically strong dual-network polyimide aerogel films for effective filtration of particle matter. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119393] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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24
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Zhang Z, Pan Y, Gong L, Yao X, Cheng X, Deng Y. Mechanically strong polyimide aerogels cross-linked with low-cost polymers. RSC Adv 2021; 11:10827-10835. [PMID: 35423560 PMCID: PMC8695888 DOI: 10.1039/d0ra10633j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 03/04/2021] [Indexed: 11/21/2022] Open
Abstract
Polyimide aerogels were prepared using low-cost polymers with different structure capped polyamide oligomers serving as cross-linking agents. To investigate the effects of the anhydride density on cross-linker chain units and side groups of cross-linkers on their properties and microstructures, two kinds of polymers from maleic anhydride, endic anhydride, and styrene were prepared by simple radical polymerization. The polyimide aerogels exhibit densities as low as 0.087 g cm−3 and specific surface areas as high as 456 m2 g−1. And the maximum modulus of the aerogel is up to 21.3 MPa. These cross-linkers are alternatives to expensive small molecule cross-linkers, therefore reducing the cost of PI aerogels. Polyimide aerogels were prepared using low-cost polymers with different structure capped polyamide oligomers serving as cross-linking agents.![]()
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Affiliation(s)
- Zhongxin Zhang
- State Key Laboratory of Fire Science, University of Science and Technology of China Hefei Anhui 230027 PR China
| | - Yuelei Pan
- State Key Laboratory of Fire Science, University of Science and Technology of China Hefei Anhui 230027 PR China
| | - Lunlun Gong
- State Key Laboratory of Fire Science, University of Science and Technology of China Hefei Anhui 230027 PR China
| | - Xiandong Yao
- NANO TECH Co., Ltd Shaoxing Zhejiang 312366 P. R. China
| | - Xudong Cheng
- State Key Laboratory of Fire Science, University of Science and Technology of China Hefei Anhui 230027 PR China
| | - Yurui Deng
- State Key Laboratory of Fire Science, University of Science and Technology of China Hefei Anhui 230027 PR China
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25
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Shi W, Ching YC, Chuah CH. Preparation of aerogel beads and microspheres based on chitosan and cellulose for drug delivery: A review. Int J Biol Macromol 2021; 170:751-767. [PMID: 33412201 DOI: 10.1016/j.ijbiomac.2020.12.214] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 12/24/2020] [Accepted: 12/29/2020] [Indexed: 12/11/2022]
Abstract
Spherical aerogels are not easily broken during use and are easier to transport and store which can be used as templates for drug delivery. This review summarizes the possible approaches for the preparation of aerogel beads and microspheres based on chitosan and cellulose, an overview to the methods of manufacturing droplets is presented, afterwards, the transition mechanisms from sol to a spherical gel are reviewed in detail followed by different drying processes to obtain spherical aerogels with porous structures. Additionally, a specific focus is given to aerogel beads and microspheres to be regarded as drug delivery carriers. Furthermore, a core/shell architecture of aerogel beads and microspheres for controlled drug release is described and subjected to inspire readers to create novel drug release system. Finally, the conclusions and outlooks of aerogel beads and microspheres for drug delivery are summarized.
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Affiliation(s)
- Wei Shi
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Yern Chee Ching
- Department of Chemical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Cheng Hock Chuah
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
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26
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Yao YM, Joo P, Jana SC. A Surfactant-Free Microfluidic Process for Fabrication of Multi-Hollow Polyimide Aerogel Particles. INT POLYM PROC 2020. [DOI: 10.3139/217.3989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Y. M. Yao
- Department of Polymer Engineering, The University of Akron, Akron, OH, USA
| | - P. Joo
- Department of Polymer Engineering, The University of Akron, Akron, OH, USA
| | - S. C. Jana
- Department of Polymer Engineering, The University of Akron, Akron, OH, USA
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27
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Mosanenzadeh SG, Karamikamkar S, Saadatnia Z, Park CB, Naguib HE. PPDA-PMDA polyimide aerogels with tailored nanostructure assembly for air filtering applications. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117279] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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28
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Guo H, Meador MAB, Cashman JL, Tresp D, Dosa B, Scheiman DA, McCorkle LS. Flexible Polyimide Aerogels with Dodecane Links in the Backbone Structure. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33288-33296. [PMID: 32586090 DOI: 10.1021/acsami.0c09321] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polyimide aerogels using 1,12-dodecyldiamine (DADD), 3,3'-dimethylbenzidine (DMBZ), and 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and cross linked using 1,3,5-triaminophenoxybenzene (TAB) were synthesized. Substitution of the aromatic diamine, DMBZ, with varying amounts of the aliphatic diamine, DADD, increases the flexibility in the backbone structure of the prepared aerogel. These aerogels are also lightweight, low density, have a low dielectric constant, and high modulus. Their overall properties (density, shrinkage, porosity, dielectric constant, water uptake, and modulus) and potential use as a conformal substrate for lightweight, high-performance antennas are discussed.
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Affiliation(s)
- Haiquan Guo
- Ohio Aerospace Institute, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Mary Ann B Meador
- NASA Glenn Research Center, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Jessica L Cashman
- NASA Glenn Research Center, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - David Tresp
- NASA Glenn Research Center, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Bushara Dosa
- NASA Glenn Research Center, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Daniel A Scheiman
- Ohio Aerospace Institute, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Linda S McCorkle
- Ohio Aerospace Institute, MS 49-3, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
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29
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Rinehart SJ, Nguyen BN, Viggiano RP, Meador MAB, Dadmun MD. Quantitative Evaluation of the Hierarchical Porosity in Polyimide Aerogels and Corresponding Solvated Gels. ACS APPLIED MATERIALS & INTERFACES 2020; 12:30457-30465. [PMID: 32538072 DOI: 10.1021/acsami.0c07971] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aerogels are promising materials for many aerospace applications, including high-performance antennae and flexible insulation, because of their inherent low density and high surface areas. Polymer aerogels, especially polyimide aerogels, provide excellent mechanical properties beyond traditional silica aerogels while maintaining the required thermal stability. Polyimide aerogel surface area, porosity, and pore volume are important properties; however, these measurements are traditionally conducted on the aerogel after removal of the solvent. Because of this, the impact of synthetic control and solvent presence on the nanoscale to mesoscale structure of polyimide aerogels in functional applications is unclear. In this report, we use small-angle neutron scattering to determine the dry and solvated skeletal strut size and composition of polyimide aerogels to deduce the impact of solvation on the structure of complex aerogel struts. Our results show that the aerogel contains a hierarchical assembly of pores, with pores present both within and between the supporting struts. This translates to a material with solvent in the larger pores, as well as absorbed in the supporting polyimide skeleton. The amount of solvent uptake in the struts varies with the solvent and polyimide properties. The insight from these results provides pathways to determine the correlations between aerogel nano- and mesoscale structural characteristics, fabrication processes, and their performance in functional applications such as polymeric battery separators. These results also broaden the characterization tools of polymeric aerogels that differentiate between dry and solvated nano- and mesoscale structures that exist in common operating conditions.
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Affiliation(s)
- Samantha J Rinehart
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Baochau N Nguyen
- Ohio Aerospace Institute, 22800 Cedar Point Road, Cleveland, Ohio 44135, United States
| | - Rocco P Viggiano
- NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Mary Ann B Meador
- NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, Ohio 44135, United States
| | - Mark D Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
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Wei S, Ching YC, Chuah CH. Synthesis of chitosan aerogels as promising carriers for drug delivery: A review. Carbohydr Polym 2020; 231:115744. [DOI: 10.1016/j.carbpol.2019.115744] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/10/2019] [Accepted: 12/14/2019] [Indexed: 12/12/2022]
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Vivod SL, Meador MAB, Pugh C, Wilkosz M, Calomino K, McCorkle L. Toward Improved Optical Transparency of Polyimide Aerogels. ACS APPLIED MATERIALS & INTERFACES 2020; 12:8622-8633. [PMID: 31984724 DOI: 10.1021/acsami.9b17796] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Highly translucent polyimide aerogels were prepared by combining equimolar amounts of pyromellitic dianhydride, 4,4'-hexafluoroisopropylidene di(phthalic anhydride) (6FDA), and 2,2'-dimethylbenzidine and cross-linking with 1,3,5-benzenetricarbonyl trichloride. A multivariable statistical design of experiments was used to perform a comparison study between three variables used to fabricate the aerogels: formulated repeat unit (n) of polyimide oligomers, 6FDA fraction of total dianhydride (0-50 mol %), and total polymer concentration in solution (7-10 wt %). Polymers with 25 mol % 6FDA in the backbone structure were found to produce polyimide aerogels with high optical transmission and low haze. These aerogels also possessed higher surface areas and very narrow nanoscale pore size distribution. Because of the decreased thermal conductivity with increasing amount of 6FDA in the backbone, these aerogels may find use where the combination of high optical transparency and thermal impedance is desired, such as insulated window panes. To this end, future efforts will focus on reducing the yellow color of the polyimide aerogels.
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Affiliation(s)
- Stephanie L Vivod
- NASA Glenn Research Center , 21000 Brookpark Road , Cleveland , Ohio 44135 , United States
| | - Mary Ann B Meador
- NASA Glenn Research Center , 21000 Brookpark Road , Cleveland , Ohio 44135 , United States
| | - Coleen Pugh
- Department of Polymer Science, Maurice Morton Institute of Polymer Science , The University of Akron , Akron , Ohio 44325-3909 , United States
| | - Melissa Wilkosz
- NASA Glenn Research Center , 21000 Brookpark Road , Cleveland , Ohio 44135 , United States
| | - Kerah Calomino
- NASA Glenn Research Center , 21000 Brookpark Road , Cleveland , Ohio 44135 , United States
| | - Linda McCorkle
- Ohio Aerospace Institute , Cleveland , Ohio 44135 , United States
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Mosanenzadeh SG, Saadatnia Z, Karamikamkar S, Park CB, Naguib HE. Polyimide aerogels with novel bimodal micro and nano porous structure assembly for airborne nano filtering applications. RSC Adv 2020; 10:22909-22920. [PMID: 35520303 PMCID: PMC9054633 DOI: 10.1039/d0ra03907a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/02/2020] [Indexed: 11/28/2022] Open
Abstract
Aerogels have presented a very high potential to be utilized as airborne nanoparticles' filtration media due to their nanoscale pore size and extremely high porosity. The filtering performance of aerogels, such as air permeability and filtration efficiency, is highly related to the configuration of aerogels' nanostructure assembly. However, as aerogel morphology is formed with respect to the intermolecular forces during the gelation stage, tailoring the aerogel nanostructure assembly is still a challenge. In this work, a novel strategy for tailoring polyimide aerogel nanostructure assembly is proposed by controlled disturbing of the intermolecular forces. From the results, the nanostructure assembly of the 4,4′-oxydianiline (ODA)–biphenyl-tetracarboxylic acid dianhydride (BPDA) polyimide aerogel is tailored to a uniform bimodal micro and nano porous structure. This was achieved by introducing the proper fraction of thermoplastic polyurethane (TPU) chains to the polyimide chains in the solution state and through a controlled process. The fabricated polyimide/TPU aerogels with bimodal morphology presented enhanced filtration performance, with 30% improved air permeability and reduced cell size of 3.51 nm over the conventional ODA–BPDA polyimide aerogels. Moreover, the fabricated bimodal aerogels present the reduced shrinkage, density, and effective thermal conductivity of 6.3% and 0.063 g cm−3, 28.7 mW m−1 K−1, respectively. Furthermore, the bimodal polyimide/TPU aerogels show the higher porosity of 96.5 vol% along with increased mechanical flexibility over the conventional polyimide aerogel with comparable backbone chemistry. Aerogels have presented a very high potential to be utilized as airborne nanoparticles' filtration media due to their nanoscale pore size and extremely high porosity.![]()
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Affiliation(s)
| | - Zia Saadatnia
- Department of Mechanical and Industrial Engineering
- University of Toronto
- Toronto
- Canada
| | - Solmaz Karamikamkar
- Department of Mechanical and Industrial Engineering
- University of Toronto
- Toronto
- Canada
| | - Chul B. Park
- Department of Mechanical and Industrial Engineering
- University of Toronto
- Toronto
- Canada
| | - Hani E. Naguib
- Department of Mechanical and Industrial Engineering
- University of Toronto
- Toronto
- Canada
- Department of Materials Science and Engineering
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Aghabararpour M, Mohsenpour M, Motahari S, Ghahreman A. Mechanical and thermal insulation properties of isocyanate crosslinked resorcinol formaldehyde aerogel: Effect of isocyanate structure. J Appl Polym Sci 2019. [DOI: 10.1002/app.48196] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Mahsa Mohsenpour
- School of Chemical Engineering, College of EngineeringUniversity of Tehran Tehran Iran
| | - Siamak Motahari
- School of Chemical Engineering, College of EngineeringUniversity of Tehran Tehran Iran
| | - Ahmad Ghahreman
- The Robert M. Buchan Department of MiningQueen's University, 25 Union Street Kingston Ontario Canada K7L 3N6
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Papastergiou M, Chriti D, Damalas DE, Raptopoulos G, Paraskevopoulou P. Poly(urethane-acrylate) aerogels from the isocyanurate trimer of isophorone diisocyanate. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2019.02.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Zhou H, Zheng S, Qu C, Wang D, Liu C, Wang Y, Fan X, Xiao W, Li H, Zhao D, Chang J, Chen C, Zhao X. Simple and environmentally friendly approach for preparing high-performance polyimide precursor hydrogel with fully aromatic structures for strain sensor. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.01.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Lian R, Lei X, Chen Y, Zhang Q. Hyperbranched‐polysiloxane‐based hyperbranched polyimide films with low dielectric permittivity and high mechanical and thermal properties. J Appl Polym Sci 2019. [DOI: 10.1002/app.47771] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ruhe Lian
- Department of Applied Chemistry, MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary ConditionsSchool of Natural and Applied Sciences, Northwestern Polytechnical University Xi'an China
| | - Xingfeng Lei
- Department of Applied Chemistry, MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary ConditionsSchool of Natural and Applied Sciences, Northwestern Polytechnical University Xi'an China
| | - Yanhui Chen
- Department of Applied Chemistry, MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary ConditionsSchool of Natural and Applied Sciences, Northwestern Polytechnical University Xi'an China
| | - Qiuyu Zhang
- Department of Applied Chemistry, MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary ConditionsSchool of Natural and Applied Sciences, Northwestern Polytechnical University Xi'an China
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Saadatnia Z, Mosanenzadeh SG, Esmailzadeh E, Naguib HE. A High Performance Triboelectric Nanogenerator Using Porous Polyimide Aerogel Film. Sci Rep 2019; 9:1370. [PMID: 30718775 PMCID: PMC6362065 DOI: 10.1038/s41598-018-38121-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 12/17/2018] [Indexed: 02/07/2023] Open
Abstract
This paper presents a novel aerogel-based Triboelectric Nanogenerator (TENG) which shows a superior performance for energy harvesting and sensing applications. Polyimide-based aerogel film with varying open-cell content level is developed to be used as the main contact material for the TENG. The fabricated aerogel film is fully characterized to reveal the chemical and mechanical properties of the developed material. It is shown the use of Polyimide aerogel film remarkably enhances the performance of the TENG compared to a TENG with fully dense Polyimide layer with no porosity. This enhancement is due to the increase on the effective surface area, charge generation inside the open-cells of the aerogel, and increase on the relative capacitance of the TENG device. The effect of varying porosity from zero to 70% of open-cell content reveals that the aerogel film with 50% shows the highest performance where the peak open-circuit voltage of 40V and peak short-circuit current of 5 μA are obtained. These values are higher than those of the TENG with simple Polyimide layer with an order of magnitude. Finally, the performance of proposed TENG under resistive loads and capacitors are tested. Thus, this work presents an effective method for high performance TENG.
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Affiliation(s)
- Zia Saadatnia
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada
| | - Shahriar Ghaffari Mosanenzadeh
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada
| | - Ebrahim Esmailzadeh
- Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe St. N. Oshawa, Ontario, L1H 7K4, Canada
| | - Hani E Naguib
- Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
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Ganesan K, Budtova T, Ratke L, Gurikov P, Baudron V, Preibisch I, Niemeyer P, Smirnova I, Milow B. Review on the Production of Polysaccharide Aerogel Particles. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2144. [PMID: 30384442 PMCID: PMC6265924 DOI: 10.3390/ma11112144] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/10/2018] [Accepted: 10/23/2018] [Indexed: 02/04/2023]
Abstract
A detailed study of the production of polysaccharide aerogel (bio-aerogel) particles from lab to pilot scale is surveyed in this article. An introduction to various droplets techniques available in the market is given and compared with the lab scale production of droplets using pipettes and syringes. An overview of the mechanisms of gelation of polysaccharide solutions together with non-solvent induced phase separation option is then discussed in the view of making wet particles. The main steps of particle recovery and solvent exchange are briefly described in order to pass through the final drying process. Various drying processes are overviewed and the importance of supercritical drying is highlighted. In addition, we present the characterization techniques to analyse the morphology and properties of the aerogels. The case studies of bio-aerogel (agar, alginate, cellulose, chitin, κ-carrageenan, pectin and starch) particles are reviewed. Potential applications of polysaccharide aerogel particles are briefly given. Finally, the conclusions summarize the prospects of the potential scale-up methods for producing bio-aerogel particles.
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Affiliation(s)
- Kathirvel Ganesan
- German Aerospace Center, Institute of Materials Research, Linder Hoehe, 51147 Cologne, Germany.
| | - Tatiana Budtova
- MINES Paris Tech, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France.
| | - Lorenz Ratke
- German Aerospace Center, Institute of Materials Research, Linder Hoehe, 51147 Cologne, Germany.
| | - Pavel Gurikov
- Institute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany.
| | - Victor Baudron
- Institute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany.
| | - Imke Preibisch
- Institute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany.
| | - Philipp Niemeyer
- German Aerospace Center, Institute of Materials Research, Linder Hoehe, 51147 Cologne, Germany.
| | - Irina Smirnova
- Institute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073 Hamburg, Germany.
| | - Barbara Milow
- German Aerospace Center, Institute of Materials Research, Linder Hoehe, 51147 Cologne, Germany.
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Ahmadi M, Rad-Moghadam K, Hatami M. From Parkinson's chemotropic agent l-dopa to thermally resistive carbonaceous nanocomposite of a new catechol-grafted poly(amide-imide). POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Jiang S, Uch B, Agarwal S, Greiner A. Ultralight, Thermally Insulating, Compressible Polyimide Fiber Assembled Sponges. ACS APPLIED MATERIALS & INTERFACES 2017; 9:32308-32315. [PMID: 28840720 DOI: 10.1021/acsami.7b11045] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Tunable density, thermally and mechanically stable, elastic, and thermally insulating sponges are required for demanding applications. Hierarchically structured sponges with bimodal interconnected pores, porosity more than 99%, and tunable densities (between 7.6 and 10.1 mg/cm3) are reported using polyimide (PI) as high temperature stable polymer. The sponges are made by freeze-drying a dispersion of short PI fibers and precursor polymer, poly(amic acid) (PAA). The concept of "self-gluing" the fibrous network skeleton of PI during sponge formation was applied to achieve mechanical stability without sacrificing the thermal properties. The sponges showed initial degradation above 400 and 500 °C in air and nitrogen, respectively. They have low thermal conductivity of 0.026 W/mK and thermal diffusivity of 1.009 mm2/s for a density of 10.1 mg/cm3. The sponges are compressible for at least 10 000 cycles and good thermal insulators even at high compressions. These fibrous PI sponges are promising candidates for potential applications in thermal insulation, lightweight construction, high-temperature filtration, sensors, and catalyst carrier for high-temperature reactions.
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Affiliation(s)
- Shaohua Jiang
- Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany
| | - Bianca Uch
- Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany
| | - Seema Agarwal
- Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany
| | - Andreas Greiner
- Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth , Universitätsstraße 30, 95440 Bayreuth, Germany
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