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Xie M, Qian G, Ye Q, Zhang Y, Wang M, Deng Z, Yu Y, Chen C, Li H, Li D. Dual-crosslinked reduced graphene oxide/polyimide aerogels possessing regulable superelasticity, fatigue resistance, and rigidity for thermal insulation and flame retardant protection in harsh conditions. J Colloid Interface Sci 2024; 676:1011-1022. [PMID: 39068833 DOI: 10.1016/j.jcis.2024.07.095] [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: 05/30/2024] [Revised: 07/09/2024] [Accepted: 07/11/2024] [Indexed: 07/30/2024]
Abstract
Polyimide (PI) aerogels have various applications in aerospace, national defense, military industry, and rail transit equipment. This paper reports a series of ultra-lightweight, high elasticity, high strength, low thermal conductivity, and high flame retardant rGO/PI nanocomposite aerogels prepared by the ice templating method. The effects of freezing processes (unidirectional freezing and random freezing), chemical composition, and environmental temperature (-196-200 °C) on the morphology, mechanical, and thermal properties of the aerogels were systematically studied. The results indicated that unidirectional aerogels exhibit anisotropic mechanical properties and thermal performance. Compression in the horizontal direction showed high elasticity, high fatigue resistance, and superior thermal insulation. Meanwhile, in the vertical direction, it demonstrated high strength (PI-G-9 reaching 14 MPa). After 10,000 cycles of compression in the horizontal direction (at 50 % strain), the unidirectional PI-G-5 aerogel still retains 90.32 % height retention, and 78.5 % stress retention, and exhibited a low stable energy loss coefficient (22.11 %). It also possessed a low thermal conductivity (32.8 mW m-1 K-1) and demonstrated good thermal insulation performance by sustaining at 200 °C for 30 min. Interestingly, the elasticity of the aerogels was enhanced with decreasing temperatures, achieving a height recovery rate of up to 100 % when compressed in liquid nitrogen. More importantly, the rGO/PI aerogels could be utilized over a wide temperature range (-196-200 °C) and had a high limiting oxygen index (LOI) ranging from 43.3 to 48.1 %. Therefore, this work may provide a viable approach for designing thermal insulation and flame-retardant protective materials with excellent mechanical properties that are suitable for harsh environments.
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Affiliation(s)
- Mingzhu Xie
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Guangtao Qian
- Collaborative Innovation Center for Civil Aviation Composites, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
| | - Qibin Ye
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Yicai Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Mengxia Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Zhiqing Deng
- Shanghai Institute of Precision Measurement and Test, Shanghai 201109, China
| | - Youhai Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Chunhai Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Hui Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Dandan Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
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Liu C, Wang M, Wang J, Xu G, Zhang S, Ding F. Double-Phase-Networking Polyimide Hybrid Aerogel with Exceptional Dimensional Stability for Superior Thermal Protection System. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404104. [PMID: 38953403 DOI: 10.1002/smll.202404104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 06/20/2024] [Indexed: 07/04/2024]
Abstract
Polyimide aerogels have been extensively used in thermal protection domain because they possess a combination of intrinsic characteristics of aerogels and unique features of polyimide. However, polyimide aerogels still suffer significant thermally induced shrinkage at temperatures above 200 °C, restricting their application at high temperature. Here, a novel "double-phase-networking" strategy is proposed for fabricating a lightweight and mechanically robust polyimide hybrid aerogel by forming silica-zirconia-phase networking skeletons, which possess exceptional dimensional stability in high-temperature environments and superior thermal insulation. The rational mechanism responsible for the formation of double-phase-networking aerogel is further explained, generally attributing to chemical crosslinking reactions and supramolecular hydrogen bond interactions derived from the main chains of polyimide and silane/zirconia precursor/sol. The as-prepared aerogels exhibit excellent high-temperature (270 °C) dimensional stability (5.09% ± 0.16%), anti-thermal-shock properties, and low thermal conductivity. Moreover, the hydrophobic treatment provides aerogels high water resistance with water contact angle of 136.9°, further suggestive of low moisture content of 3.6% after exposure to 70 °C and 85% relative humidity for 64 h. The proposed solution for significantly enhancing high-temperature dimensional stability and thermal insulation provides a great supporting foundation for fabricating high-performance organic aerogels as thermal protection materials in aerospace.
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Affiliation(s)
- Chun Liu
- Polymer Aerogels Research Center, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Thermal Control Technology Laboratory of Aircraft in Space Environment, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
| | - Mingkang Wang
- Polymer Aerogels Research Center, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Thermal Control Technology Laboratory of Aircraft in Space Environment, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
| | - Jing Wang
- Polymer Aerogels Research Center, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Thermal Control Technology Laboratory of Aircraft in Space Environment, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
| | - Guangyu Xu
- Polymer Aerogels Research Center, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Thermal Control Technology Laboratory of Aircraft in Space Environment, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
| | - Sizhao Zhang
- Polymer Aerogels Research Center, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Thermal Control Technology Laboratory of Aircraft in Space Environment, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, Hunan, 410073, China
| | - Feng Ding
- Polymer Aerogels Research Center, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
- Thermal Control Technology Laboratory of Aircraft in Space Environment, Jiangxi University of Science and Technology, Nanchang, Jiangxi, 330013, China
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3
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Hashimoto Y, Hase A, Shiromae R, Nishimura R, Morimoto M, Hattori Y, Mayama H, Yokojima S, Nakamura S, Uchida K. Straightforward Fabrication of Double Roughness Structures on a Microcrystalline Film of a Diarylethene Derivative. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7661-7668. [PMID: 38535724 DOI: 10.1021/acs.langmuir.4c00365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Double roughness structure mimicking the surface of a lotus leaf was prepared using a newly synthesized diarylethene having a six-membered perfluorocyclohexene ring. The cubic-shaped crystals of the open-ring isomer, with sizes of approximately 7 μm, appeared immediately following solution casting. Upon UV irradiation, each cubic crystal was covered with needle-shaped crystals of the closed-ring isomer to form double roughness structures within 1 h. This structure could bear the continuous impact of water droplets.
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Affiliation(s)
- Yuki Hashimoto
- Department of Materials Chemistry, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Amane Hase
- Department of Materials Chemistry, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Ryotaro Shiromae
- Department of Materials Chemistry, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Ryo Nishimura
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Masakazu Morimoto
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
| | - Yohei Hattori
- Department of Materials Chemistry, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
| | - Hiroyuki Mayama
- Department of Chemistry, Asahikawa Medical University, 2-1-1-1 Midorigaoka-higashi, Asahikawa 078-8510, Japan
| | - Satoshi Yokojima
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Shinichiro Nakamura
- Priority Organization for Innovation and Excellence Laboratory for Data Science, Kumamoto University, 2-39-1, Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Kingo Uchida
- Department of Materials Chemistry, Ryukoku University, Seta, Otsu, Shiga 520-2194, Japan
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Ji X, Zha W, Luo Q, Li G, Du Y, Zhang X. Ratio-Tuning of Silica Aerogel Co-Hydrolyzed Precursors Enables Broadband, Angle-Independent, Deformation-Tolerant, Achieving 99.7% Reflectivity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301534. [PMID: 37093554 DOI: 10.1002/smll.202301534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/05/2023] [Indexed: 05/03/2023]
Abstract
The super-white body might be defined as its reflectivity exceeding 98% at any angle in the visible light spectrum, which can be used in a variety of emerging fields including optics, energy, environment, aerospace, etc. However, elaborate synthesis of a light-weight, highly reflective super-white aerogel body remains a great challenge. In this work, fine-tuning of silica aerogel co-hydrolyzed precursor ratios, 99.7% reflectivity with angle-independence in the visible light spectrum has been successfully achieved when the areal density is only 0.129 g cm-2 , which breaks through the theoretical bandwidth limit of photonic crystals as well as the measured reflectivity limit of conventional porous materials. Furthermore, the reflectivity of super-white silica aerogel remains unchanged after various harsh deformations including compression and bending 1000 times, solar (≈800 W m-2 ), ultraviolet (≈0.68 W m-2 ), and humidity (100%) aging for 100 days, liquid nitrogen (-196 °C) and high-temperature (300 °C) thermal shock 100 times. As proofs of performance, the resulting super-white silica aerogels have been used as the novel standard white plate for better spectrum calibration, as the flexible projector curtains for optical display, as well as the transmitted light reflective layer in the photovoltaic cell for improving the relative power conversion efficiency of 5.6%.
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Affiliation(s)
- Xiaofei Ji
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, P. R. China
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Wusong Zha
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, P. R. China
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Qun Luo
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Guangyong Li
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Yu Du
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, 230026, P. R. China
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Xuetong Zhang
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
- Division of Surgery & Interventional Science, University College London, London, NW3 2PF, UK
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5
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Zhan W, Chen L, Kong Q, Li L, Chen M, Jiang J, Li W, Shi F, Xu Z. The Synthesis and Polymer-Reinforced Mechanical Properties of SiO 2 Aerogels: A Review. Molecules 2023; 28:5534. [PMID: 37513406 PMCID: PMC10384082 DOI: 10.3390/molecules28145534] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/04/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Silica aerogels are considered as the distinguished materials of the future due to their extremely low thermal conductivity, low density, and high surface area. They are widely used in construction engineering, aeronautical domains, environmental protection, heat storage, etc. However, their fragile mechanical properties are the bottleneck restricting the engineering application of silica aerogels. This review briefly introduces the synthesis of silica aerogels, including the processes of sol-gel chemistry, aging, and drying. The effects of different silicon sources on the mechanical properties of silica aerogels are summarized. Moreover, the reaction mechanism of the three stages is also described. Then, five types of polymers that are commonly used to enhance the mechanical properties of silica aerogels are listed, and the current research progress is introduced. Finally, the outlook and prospects of the silica aerogels are proposed, and this paper further summarizes the methods of different polymers to enhance silica aerogels.
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Affiliation(s)
- Wang Zhan
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Le Chen
- Department of Electronic Engineering, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
| | - Qinghong Kong
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Lixia Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Mingyi Chen
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Juncheng Jiang
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing 213000, China
| | - Weixi Li
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Fan Shi
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhiyuan Xu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
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6
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Tang JY, Xiong YS, Li MX, Jia R, Zhou LS, Fan BH, Li K, Li W, Li H, Lu HQ. Hyperbranched polyethyleneimine-functionalised chitosan aerogel for highly efficient removal of melanoidins from wastewater. JOURNAL OF HAZARDOUS MATERIALS 2023; 447:130731. [PMID: 36640505 DOI: 10.1016/j.jhazmat.2023.130731] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/23/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Melanoidins are hazardous dark-coloured substances contained in molasses-based distillery wastewater. Adsorption is an effective approach to eliminate melanoidins from wastewater. However, melanoidin adsorption capacities of available adsorbents are unsatisfactory, which seriously limits their practical application. A hyperbranched polyethyleneimine-functionalised chitosan aerogel (HPCA) was fabricated as an effective adsorbent for melanoidin scavenging. HPCA demonstrated superior melanoidin adsorption efficiency because of its high specific surface area, abundant amino functional groups, and high hydrophilicity. Melanoidin removal rate of HPCA was 94.95%, which remained at 91.45% after 5 cycles. Notably, using the Langmuir isothermal model, the maximum melanoidin adsorption capacity of HPCA was determined to be 868.36 mg/g, surpassing those of most of previously reported adsorbents. Toxicity experiments indicated that HPCA can be considered a safe adsorbent with excellent biocompatibility that hardly threatens aquatic organisms. The efficient melanoidin removal of HPCA was attributed to electrostatic attraction, H-bonding, and van der Waals force. However, the adsorption might be predominantly controlled by electrovalent interaction between protonated amino groups of HPCA and carboxyl/carboxylate groups of melanoidins. Two novel models, namely, external diffusion resistance-internal diffusion resistance mixed model and adsorption on active site model, were employed to describe the dynamic mass transfer characteristics of melanoidin adsorption by HPCA.
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Affiliation(s)
- Jia-Yi Tang
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Yan-Shu Xiong
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Ming-Xing Li
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Ran Jia
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Li-Shu Zhou
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Bo-Huan Fan
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Kai Li
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Wen Li
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China.
| | - Hong Li
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Hai-Qin Lu
- College of Light Industry and Food Engineering, Guangxi University, Nanning, China.
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7
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Du N, Huang LY, Xiong YS, Tian R, Yin JY, Cao DY, Hu DB, Lu HQ, Li W, Li K. Micro-mechanism insights into the adsorption of anionic dyes using quaternary ammonium-functionalised chitosan aerogels. Carbohydr Polym 2023; 313:120855. [PMID: 37182955 DOI: 10.1016/j.carbpol.2023.120855] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 03/13/2023] [Accepted: 03/25/2023] [Indexed: 04/03/2023]
Abstract
The development of adsorbents with outstanding adsorption capacities, wide versatility, and excellent recyclability for the removal of organic dyes remains a challenge. In this study, a quaternised chitosan-based aerogel (QCSA) was fabricated via a facile method to effectively treat concomitant anionic dyes. Porous QCSA with high hydrophilicity, nontoxicity, excellent thermal stability, and sustainability exhibits adsorption properties superior to most previously reported adsorbents. The equilibrium adsorption capacities for Congo red, Sunset yellow, and Methyl orange were 1259.6, 550.2, and 607.5 mg/g, respectively. Notably, the spent QCSA exhibits excellent cyclic performance. The multilayer adsorption, external-internal mass transfer resistance, and adsorption on the active site models were employed to enable a more accurate description of the dynamic characteristics, confirming that double-layer chemisorption was the dominant process. A quantitative analysis of the electrostatic potential and the independent gradient model further verified that electrostatic interactions, hydrogen bonding, and van der Waals forces led to the highly efficient adsorption of dye molecules. Therefore, the eco-friendly and recyclable QCSA is a promising adsorbent for trapping anionic dyes from aquatic systems.
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8
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Preparation of degradable bio-based silicone/epoxy hybrid resins towards low dielectric composites. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111691] [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]
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9
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Li Y, Ma B, Zhang R, Luo X. Mechanically strong, thermal-insulated, and ultralow dielectric polyimide aerogels with adjustable crosslinking methods. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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He H, Liu Q, Zhang SD, Chen HB. Fabrication and Properties of Polyimide/Carbon Fiber Aerogel and the Derivative Carbon Aerogel. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04654] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao He
- College of Mechanical and Automotive, South China University of Technology, Guangzhou, Guangdong 510640, China
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
| | - Qiang Liu
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
| | - Shui-Dong Zhang
- College of Mechanical and Automotive, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - Hong-Bing Chen
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
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11
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Xu X, Cao J, Zhang Y, Yang F, Deng Y. The synthesis and properties of isocyanate-based polyimide foam composites containing MWCNTs of various contents and diameters. RSC Adv 2022; 12:5546-5556. [PMID: 35425543 PMCID: PMC8981269 DOI: 10.1039/d1ra06721d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/23/2021] [Indexed: 11/21/2022] Open
Abstract
Polyimide foams (PIFs) were synthesized using in situ polymerization from poly((phenyl isocyanate)-co-formaldehyde) (PAPI), pyromellitic dianhydride (PMDA), and multi-walled carbon nanotubes (MWCNTs) (0.05, 0.1, 0.2, 0.4, and 0.6 wt%) functionalized with –OH; the diameters were 10–20 nm, 20–30 nm, and >50 nm. The morphology, mechanical properties, and flame retardancy of the composites made from MWCNTs with different contents and diameters were studied. The effects of different contents of MWCNT on the properties of composites were compared. SEM results show that the pore morphology of PIF was not damaged when the content of the MWCNTs was low due to crosslinking between MWCNTs and amide bonds. When the content of the MWCNTs was high, the vacuoles of PIF became large and uneven. Compared to pure PIF, mwCNT-1 (0.2% MWCNT content) significantly increased the compressive strength (330%) and compression modulus (210%) of PI. Due to the significant thermal stability of PIF/MWCNTs, the degradation temperature of PIF/MWCNT-1 (0.2% MWCNT content) was increased from 302 °C to 321.5 °C upon addition of MWCNTs. The effects of different diameters of MWCNTs on the morphology and properties of the PIF/MWCNT composites were also compared. The morphology, thermal stability, and mechanical properties of the composites containing smaller MWCNTs were higher than those of composites containing larger MWCNTs. This is because MWCNTs act as nucleating agents to promote the formation and growth of bubbles. Smaller diameters of MWCNTs lead to higher MWCNT contents in the unit volume and more nucleation points of MWCNTs in the PIF. An increasing MWCNT diameter leads to a gradually decreasing number of bubbling nucleation centers. The LOI of PIF/MWCNTS increased with increasing MWCNT due to the nitrogen heterocyclic interaction between the PIF and MWCNTS. The diameter of MWCNTS had only a minor effect on the flame retardancy. PIFs were synthesized using in situ polymerization from PAPI, PMDA, and MWCNTs (0.05, 0.1, 0.2, 0.4, and 0.6 wt%) functionalized with –OH; the diameters were 10–20 nm, 20–30 nm, and >50 nm.![]()
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Affiliation(s)
- Xinyu Xu
- School of Petrochemical Engineering, Liaoning Petrochemical University Fushun 113001 Liaoning China
| | - Jingjing Cao
- School of Petrochemical Engineering, Liaoning Petrochemical University Fushun 113001 Liaoning China
| | - Yudi Zhang
- School of Petrochemical Engineering, Liaoning Petrochemical University Fushun 113001 Liaoning China
| | - Fukai Yang
- School of Petrochemical Engineering, Liaoning Petrochemical University Fushun 113001 Liaoning China
| | - Yuyuan Deng
- School of Petrochemical Engineering, Liaoning Petrochemical University Fushun 113001 Liaoning China
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12
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Dong W, Li B, Wei J, Liang W, Zhang J. Durable and transparent super anti-wetting coatings with excellent liquid repellency and anti-fouling performance based on fluorinated polysiloxane. NEW J CHEM 2022. [DOI: 10.1039/d2nj00880g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Super anti-fouling coatings are of great interest because of their good liquid repellency and anti-fouling performance. However, it is challenging to prepare durable and transparent super anti-fouling coatings, especially via...
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13
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Wang J, Wang J, Sheng Z, Du R, Yan L, Zhang X. Solid-Liquid-Vapor Triphase Gel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13501-13511. [PMID: 34739232 DOI: 10.1021/acs.langmuir.1c02333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Gels are soft functional materials with solid networks and open pores filled with solvents (for wet gels) or air (for aerogels), displaying broad applications in tissue engineering, catalysis, environmental remediation, energy storage, etc. However, currently known gels feature only a single (either solid-liquid or solid-vapor) interface, largely limiting their application territories. Therefore, it is both fundamentally intriguing and practically significant to develop conceptually new gel materials that possess solid-liquid-vapor multiple interfaces. Herein, we demonstrate a unique solid-liquid-vapor triphase gel, named as aerohydrogel, by gelling of a poly(vinyl alcohol) aqueous solution with glutaraldehyde in the presence of superhydrophobic silica aerogel microparticles. Owing to its continuous solid, liquid, and vapor phases, the resultant aerohydrogel simultaneously displays solid-liquid, solid-vapor, and liquid-vapor interfaces, leading to excellent properties including tunable density (down to 0.43 g·cm-3), considerable hydrophobicity, and excellent elasticity (compressive ratio of up to 80%). As a proof-of-concept application, the aerohydrogel exhibits a higher evaporative cooling efficiency than its hydrogel counterpart and a better cooling capability than the commercial phase change cooling film, respectively, showing promising performance in cooling various devices. Moreover, the resulting aerohydrogel could be facilely tailored with specific (e.g., magnetic) properties for emerging applications such as solar steam generation. This work extends biphase gel (hydrogel or aerogel) to solid-liquid-vapor triphase gel, as well as provides a promising strategy for designing more aerohydrogels serving as soft functional materials for applications in various emerging fields.
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Affiliation(s)
- Jinpei Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, P. R. China
| | - Jin Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Zhizhi Sheng
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
| | - Ran Du
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
| | - Lifeng Yan
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China
| | - Xuetong Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China
- Division of Surgery & Interventional Science, University College London, London NW3 2PF, U.K
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14
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Ogbonna VE, Popoola API, Popoola OM, Adeosun SO. Recent progress on improving the mechanical, thermal and electrical conductivity properties of polyimide matrix composites from nanofillers perspective for technological applications. JOURNAL OF POLYMER ENGINEERING 2021. [DOI: 10.1515/polyeng-2021-0176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The adoption of polymer nanocomposites in the design/manufacturing of parts for engineering and technological applications showcases their outstanding properties. Among the polymer nanocomposites, polyimide (PI) nanocomposites have attracted much attention as a composite material capable of withstanding mechanical, thermal and electrical stresses, hence engineered for use in harsh environments. However, the nanocomposites are limited to the application area that demands conduction polymer and polymer composites due to the low electrical conductivity of PI. Although, there has been advancement in improving the mechanical, thermal and electrical properties of PI nanocomposites. Thus, the review focuses on recent progress on improving the mechanical, thermal and electrical conductivity properties of PI nanocomposites via the incorporation of carbon nanotubes (CNTs), graphene and graphene oxide (GO) fillers into the PI matrix. The review summarises the influence of CNTs, graphene and GO on the mechanical and conductivity properties of PI nanocomposites. The authors ended the review with advancement, challenges and recommendations for future improvement of PI reinforced conductive nanofillers composites. Therefore, the review study proffers an understanding of the improvement and selection of PI nanocomposites material for mechanical, thermal and electrical conductivity applications. Additionally, in the area of conductive polymer nanocomposites, this review will also pave way for future study.
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Affiliation(s)
- Victor Ekene Ogbonna
- Chemical, Metallurgical & Materials Engineering , Tshwane University of Technology , P.M.B X680 , Pretoria , South Africa
| | - A. Patricia I. Popoola
- Chemical, Metallurgical & Materials Engineering , Tshwane University of Technology , P.M.B X680 , Pretoria , South Africa
| | - Olawale M. Popoola
- Centre for Energy and Power , Tshwane University of Technology , P.M.B X680 , Pretoria , South Africa
| | - Samson O. Adeosun
- Metallurgical & Materials Engineering , University of Lagos , Yaba , Lagos 23401 , Nigeria
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15
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Liu Z, Ye L, Xi J, Wang J, Feng ZG. Cyclodextrin polymers: Structure, synthesis, and use as drug carriers. Prog Polym Sci 2021. [DOI: 10.1016/j.progpolymsci.2021.101408] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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16
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Hu S, Cao X, Reddyhoff T, Shi X, Peng Z, deMello AJ, Dini D. Flexibility-Patterned Liquid-Repelling Surfaces. ACS APPLIED MATERIALS & INTERFACES 2021; 13:29092-29100. [PMID: 34078079 DOI: 10.1021/acsami.1c05243] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Droplets impacting solid surfaces is ubiquitous in nature and of practical importance in numerous industrial applications. For liquid-repelling applications, rigidity-based asymmetric redistribution and flexibility-based structural oscillation strategies have been proven on artificial surfaces; however, these are limited by strict impacting positioning. Here, we show that the gap between these two strategies can be bridged by a flexibility-patterned design similar to a trampoline park. Such a flexibility-patterned design is realized by three-dimensional projection micro-stereolithography and is shown to enhance liquid repellency in terms of droplet impalement resistance and contact time reduction. This is the first demonstration of the synergistic effect obtained by a hybrid solution that exploits asymmetric redistribution and structural oscillation in liquid-repelling applications, paving the rigidity-flexibility cooperative way of wettability tuning. Also, the flexibility-patterned surface is applied to accelerate liquid evaporation.
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Affiliation(s)
- Songtao Hu
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaobao Cao
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich 8093, Switzerland
| | - Tom Reddyhoff
- Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Xi Shi
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhike Peng
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Andrew J deMello
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich 8093, Switzerland
| | - Daniele Dini
- Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, U.K
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17
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Zhuo T, Xin B, Chen Z, Xu Y, Zhou X, Yu J. Enhanced thermal insulation properties of PI nanofiber membranes achieved by doping with SiO2 nanoparticles. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Li X, Dong G, Liu Z, Zhang X. Polyimide Aerogel Fibers with Superior Flame Resistance, Strength, Hydrophobicity, and Flexibility Made via a Universal Sol-Gel Confined Transition Strategy. ACS NANO 2021; 15:4759-4768. [PMID: 33636972 DOI: 10.1021/acsnano.0c09391] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Aerogel fibers with ultrahigh porosity, large specific surface area, and ultralow density have shown increasing interest due to being considered as the next generation thermal insulation fibers. However, it is still a great challenge to fabricate arbitrary aerogel fibers via the traditional wet-spinning approach due to the obvious conflict between the static sol-gel transition of the aerogel bulks and the dynamic wet-spinning process of aerogel fibers. Herein, a sol-gel confined transition (SGCT) strategy was developed for fabricating various mesoporous aerogel fibers, in which the aerogel precursor solution was first driven by the surface tension into the capillary tubes, then the gel fibers were easily formed in the confined space after static sol-gel process, and finally the mesoporous aerogel fibers were obtained via the supercritical CO2 drying process. As a typical case, the polyimide (PI) aerogel fiber prepared via the SGCT approach has exhibited a large specific surface area (up to 364 m2/g), outstanding mechanical property (with elastic modulus of 123 MPa), superior hydrophobicity (with contact angle of 153°), and excellent flexibility (with curvature radius of 200 μm). Therefore, the aerogel woven fabric made from PI aerogel fibers has possessed an excellent thermal insulation performance in a wide temperature window, even under the harsh environment. Besides, arbitrary kinds of aerogel fibers, including organic aerogel fibers, inorganic aerogel fibers, and organic-inorganic hybrid aerogel fibers, have been fabricated successfully, suggesting the universality of the SGCT strategy, which not only provides a way for developing aerogel fibers with different components but also plays an irreplaceable role in promoting the upgrading of the fiber fields.
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Affiliation(s)
- Xin Li
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Guoqing Dong
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Zengwei Liu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Xuetong Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- Division of Surgery & Interventional Science, University College London, London NW3 2PF, United Kingdom
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19
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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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20
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Liu Z, Liu L, Zhong Z, Ran Y, Xi J, Wang J. Ultralight hybrid silica aerogels derived from supramolecular hydrogels self-assembled from insoluble nano building blocks. RSC Adv 2021; 11:7331-7337. [PMID: 35423243 PMCID: PMC8695017 DOI: 10.1039/d1ra00418b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 02/06/2021] [Indexed: 11/21/2022] Open
Abstract
Supramolecular hydrogels are a type of hydrogel cross-linked by non-chemical bonds and they have been widely applied in the field of smart systems, sensors, tissue engineering, and controlled drug delivery. Most supramolecular hydrogels are formed by soluble molecules, polymers, and metal ions. In this work, supramolecular hydrogels self-assembled between two insoluble nano building blocks (ISNBBs), graphene oxide (GO) and amino-functionalized silica nanoparticles (SiO2-NH2), have been discovered and synthesized. The gelation conditions of the two ISNBBs have been investigated. A step further, ultralight hybrid silica aerogels are obtained by supercritical drying of the physical hydrogels. No visible volume shrinkage is observed, due to the fact that the hydrogel networks are formed by rigid ISNBBs. Thus the hybrid aerogels possess ultralow density (down to 7.5 mg cm-3), high specific surface areas (178.6 m2 g-1), and extremely high porosity (99.6%). The present work shows an alternative strategy to design and synthesize supramolecular hydrogels and aerogels using predetermined building blocks, together with designable morphology and physical properties for the target aerogels.
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Affiliation(s)
- Zongjian Liu
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University Beijing 100144 P. R. China
| | - Ling Liu
- 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
| | - Zhenggen Zhong
- 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
| | - Yuanyuan Ran
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University Beijing 100144 P. R. China
| | - Jianing Xi
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University Beijing 100144 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
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21
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Wang J, Wang J. Advances on Dimensional Structure Designs and Functional Applications of Aerogels. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a20110531] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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22
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Liu Z, Ran Y, Xi J, Wang J. Polymeric hybrid aerogels and their biomedical applications. SOFT MATTER 2020; 16:9160-9175. [PMID: 32851389 DOI: 10.1039/d0sm01261k] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aerogels are a class of porous materials that possess extremely high specific surface area, high pore volume, high porosity, and variable chemical structures. They have been widely applied in the fields of aerospace, chemical engineering, construction, electrotechnics, and biomedicine. In recent years a great boom in aerogels has been observed, where various new aerogels with novel physicochemical properties and functions have been synthesized. Nevertheless, native aerogels with a single component normally face severe problems such as low mechanical strength and lack of functions. One strategy to solve the problems is to construct hybrid aerogels. In this study, a comprehensive review on polymer based hybrid aerogels is presented, including polymer-polymer, polymer-carbon material, and polymer-inorganic hybrid aerogels, which will be introduced and discussed in view of their chemical structures and hybrid structures. Most importantly, polymeric hybrid aerogels are classified into three different composition levels, which are molecular-level, molecular-aggregate-level, and aggregate-level, due to the fact that hybrid aerogels with the same chemical structures but with different composition levels might show quite different functions or properties. The biomedical applications of these hybrid aerogels will also be reviewed and discussed, where the polymeric components in the hybrid aerogels provide the main contribution. This review would provide creative design principles for aerogels by considering both their chemical and physical structures.
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Affiliation(s)
- Zongjian Liu
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P. R. China.
| | - Yuanyuan Ran
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P. R. China.
| | - Jianing Xi
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P. R. China.
| | - Jin Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China. and Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Chinese Academy of Sciences, Suzhou 215123, P. R. China
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23
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Curing behaviors and properties of epoxy resins with para-hexatomic ring blocks: Excellent comprehensive performances of tetrafluorophenyl. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122828] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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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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25
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Li X, Wang J, Zhao Y, Zhang X. Superhydrophobic polyimide aerogels via conformal coating strategy with excellent underwater performances. J Appl Polym Sci 2020. [DOI: 10.1002/app.48849] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xin Li
- School of Materials Science and EngineeringBeijing Institute of Technology Beijing 100081 People's Republic of China
- Suzhou Institute of Nano‐Tech and Nano‐BionicsChinese Academy of Sciences Suzhou 215123 People's Republic of China
| | - Jin Wang
- Suzhou Institute of Nano‐Tech and Nano‐BionicsChinese Academy of Sciences Suzhou 215123 People's Republic of China
| | - Yibo Zhao
- Aerospace Research Institute of Materials and Processing Technology Beijing 100076 People's Republic of China
| | - Xuetong Zhang
- Suzhou Institute of Nano‐Tech and Nano‐BionicsChinese Academy of Sciences Suzhou 215123 People's Republic of China
- Department of Surgical Biotechnology, Division of Surgery & Interventional ScienceUniversity College London London NW3 2PF United Kingdom
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26
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Wang J, Fang Q, Ye L, Zhang A, Feng ZG. The intrinsic microstructure of supramolecular hydrogels derived from α-cyclodextrin and pluronic F127: nanosheet building blocks and hierarchically self-assembled structures. SOFT MATTER 2020; 16:5906-5909. [PMID: 32555865 DOI: 10.1039/d0sm00979b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Supramolecular hydrogels derived from the self-assembly of α-cyclodextrin with pluronic F127 were found to be built up with polypseudorotaxane nanosheets with a thickness of 30-40 nm and possessed flower-like hierarchically assembled structures. The findings in this work could provide critical guidance for material design for biomedical purposes.
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Affiliation(s)
- Jin Wang
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Chinese Academy of Sciences, Suzhou 215123, P. R. China
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27
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Zhang Z, Wang X, Zu G, Liu L, Zhang X, Xi S, Zhao H, Shen J. Effect of different chemical liquid deposition methods on the microstructure and properties of polyimide-polyvinylpolymethylsiloxane composite aerogels. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2020.104811] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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28
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Prasanna VL, Mamane H, Vadivel VK, Avisar D. Ethanol-activated granular aerogel as efficient adsorbent for persistent organic pollutants from real leachate and hospital wastewater. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121396. [PMID: 31610343 DOI: 10.1016/j.jhazmat.2019.121396] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/11/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
Hydrophobic aerogels were used to remove three types of persistent organic pollutants: pharmaceutical drugs (i.e. doxorubicin [DOX], paclitaxel [TAX]), phthalates (diethyl phthalate [DEP]), and hydrophilic rhodamine dye (RhB) from synthetic and real wastewaters, using Lumira granular aerogel from Cabot activated with EtOH (ET-GAG). The hydrophobic silica aerogel was characterized by X-ray diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), Brunauer-Emmet-Teller (BET) and attenuated total reflection-Fourier transform infrared spectroscopy. The pollutants were analysed by high-performance liquid chromatography (HPLC)-UV and HPLC-mass spectrometry. The adsorption process was governed by hydrophobic- hydrophobic interactions between the ET-GAG and micropollutants. The adsorption capacity of ET-GAG, examined by batch experiments, for DOX, TAX and DEP were 13.80, 14.28 and 17.54 mg/g respectively. The rate of adsorption to ET-GAG is high in the initial 40 min followed by no change in the rate due to saturation of adsorption sites. ET-GAG was able to completely remove micropollutants from real leachate and hospital wastewater, implying practical applications. Regeneration of the aerogel was studied by solvent extraction. Et-GAG adsorbent demonstrated better removal of toxic chemotherapeutic drugs and phthalates than GAC.
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Affiliation(s)
- V Lakshmi Prasanna
- The Water Research Center, The Hydro-Chemistry Laboratory, Porter School for Environment and Earth Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Hadas Mamane
- School of Mechanical Engineering, The Water Research Center, Environmental Engineering Program, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| | - Vinod Kumar Vadivel
- School of Mechanical Engineering, The Water Research Center, Environmental Engineering Program, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| | - Dror Avisar
- The Water Research Center, The Hydro-Chemistry Laboratory, Porter School for Environment and Earth Sciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel.
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29
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Li J, Yu N, Jing Z, He X, Shi X, Zhang G. Fabrication of rigid polyimide foams via thermal foaming of nadimide-end-capped polyester-amine precursor. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-03045-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Liu R, Wang J, Du Y, Liao J, Zhang X. Phase-separation induced synthesis of superhydrophobic silica aerogel powders and granules. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.120971] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Wu Z, Han B, Zhang C, Zhu D, Yang Z. Preparation and characterization of highly hydrophobic fluorinated polyimide aerogels cross-linked with 2,2′,7,7′-Tetraamino- 9,9′-spirobifluorene. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121605] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Functionalized Multiwalled Carbon Nanotube-Reinforced Polyimide Composite Films with Enhanced Mechanical and Thermal Properties. INT J POLYM SCI 2019. [DOI: 10.1155/2019/9302803] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Polyimide- (PI-) based nanocomposites containing the 4,4′-diaminodiphenyl ether- (ODA-) modified multiwalled carbon nanotube (MWCNT) filler were successfully prepared. The PI/MWCNTs-ODA composite films exhibit high thermal conductivity and excellent mechanical property. The optimal value of thermal conductivity of the PI/MWCNTs-ODA composite film is 0.4397 W/mK with 3 wt.% filler loading, increased by 221.89% in comparison with that of the pure PI film. In addition, the tensile strength of the PI/MWCNTs-ODA composite film is 141.48 MPa with 3 wt.% filler loading, increased by 20.74% in comparison with that of the pure PI film. This work develops a new strategy to achieve a good balance between the high thermal conductivity and excellent mechanical properties of polyimide composite films by using functionalized carbon nanotubes as an effective thermal conductive filler.
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33
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Huang J, Huang X, He M, Zhang B, Feng G, Yin G, Cui Y. Control of graphene aerogel self-assembly in strongly acidic solution via solution polarity tuning. RSC Adv 2019; 9:21155-21163. [PMID: 35521349 PMCID: PMC9065991 DOI: 10.1039/c9ra02658d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 06/28/2019] [Indexed: 11/21/2022] Open
Abstract
In view of their advantages (plasticity, low density, adjustable pore size, high porosity of >99.9%), three-dimensional graphene aerogels (GAs) are widely used for energy storage and adsorption separation, which has inspired the development and optimization of the corresponding synthetic techniques. In particular, self-assembly in the liquid phase features the benefits of tunability and sustainability and is viewed as a promising strategy of GA synthesis. During hydrothermal GA preparation, hydrophilic graphene oxide (GO) gradually turns lipophilic upon reduction, and the resulting phase transition separation and polarity change induce self-assembly into an aerogel. However, the effect of solution polarity on the structure or state of dispersed GO nanosheets, which affects the final property-determining process of automatic assembly, is still unclear. Herein, we prepared a series of GAs by hydrothermal reduction of unwashed GO with vitamin C in liquid-phase systems of different polarity and investigated the effects of polarity on the self-assembly process and aerogel properties using a range of instrumental techniques. The results showed that GO reduction is slowed down in weakly polar systems and further demonstrated that the shape of partially reduced graphene oxide (rGO) flakes depends on solution polarity. Flaky, layered, and stacked rGO particles obtained in strongly polar media self-assembled into anisotropic gully aerogels that were brittle and almost completely inelastic. Conversely, in weakly polar media, the prepared rGO sheets were twisted, which increased the number of contact points and modes between sheets and resulted in self-assembly into uniform-pore-structure honeycomb aerogels that showed good elasticity and could be repeatedly compressed.
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Affiliation(s)
- Jinhui Huang
- School of Materials Science and Engineering, Northwestern Polytechnical University Xi'an 710072 PR China
| | - Xue Huang
- Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Zhongkai University of Agriculture and Engineering Guangzhou 510225 P. R. China +86-20-89002328
| | - Ming He
- Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Zhongkai University of Agriculture and Engineering Guangzhou 510225 P. R. China +86-20-89002328
| | - Buning Zhang
- Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Zhongkai University of Agriculture and Engineering Guangzhou 510225 P. R. China +86-20-89002328
| | - Guangzhu Feng
- Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Zhongkai University of Agriculture and Engineering Guangzhou 510225 P. R. China +86-20-89002328
| | - Guoqiang Yin
- Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Zhongkai University of Agriculture and Engineering Guangzhou 510225 P. R. China +86-20-89002328
| | - Yingde Cui
- School of Materials Science and Engineering, Northwestern Polytechnical University Xi'an 710072 PR China
- Guangzhou Vocational College of Science and Technology Guangzhou 510550 P. R. China +86-20-87411788
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Qiao X, Chen R, Zhang H, Liu J, Liu Q, Yu J, Liu P, Wang J. Outstanding cavitation erosion resistance of hydrophobic polydimethylsiloxane‐based polyurethane coatings. J Appl Polym Sci 2019. [DOI: 10.1002/app.47668] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xingnian Qiao
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
- College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 China
| | - Rongrong Chen
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
- College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 China
- Institute of Advanced Marine MaterialsHarbin Engineering University 150001, China
| | - Hongsen Zhang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
| | - Jingyuan Liu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
- College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 China
| | - Qi Liu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
- College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 China
| | - Jing Yu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
- College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 China
| | - Peili Liu
- Institute of Advanced Marine MaterialsHarbin Engineering University 150001, China
| | - Jun Wang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of EducationHarbin Engineering University Harbin 150001 China
- College of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001 China
- Institute of Advanced Marine MaterialsHarbin Engineering University 150001, China
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Wu M, An R, Yadav SK, Jiang X. Graphene tailored by Fe3O4 nanoparticles: low-adhesive and durable superhydrophobic coatings. RSC Adv 2019; 9:16235-16245. [PMID: 35521368 PMCID: PMC9064432 DOI: 10.1039/c9ra02008j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 05/18/2019] [Indexed: 12/29/2022] Open
Abstract
This study reports stable superhydrophobic Fe3O4/graphene hybrid coatings prepared by spin coating of the Fe3O4/graphene/PDMS mixed solution on titanium substrates. By tailoring graphene sheets with Fe3O4 nanoparticles, the superhydrophobicity of graphene platelets was largely enhanced with a water contact angle of 164° and sliding angle <2°. Fe3O4 nanoparticles interact with FLG sheets via Fe–O–C covalent link, to form a graphene micro-sheet pinned strongly by nano-sized Fe3O4. The newly-formed micro/nano-structured sheets interact with each other via strong dipole–dipole attractions among Fe3O4 nanoparticles, confirmed by the blue shifts of G band observed in Raman spectra. The strongly interactive micro/nano-structured sheets are responsible for the improvement of both the surface hydrophobicity and the durability towards water impacting. The obtained hybrid coatings possess excellent durability in various environments, such as acidic and basic aqueous solutions, simulating ocean water. And also the coatings can retain their stable superhydrophobicity in Cassie–Baxter state even after annealing at 250 °C or refrigerating at −39 °C for 10 h. We employed an AFM to probe nanoscale adhesion forces to examine further the ability of the as-prepared coatings to resist the initial formation of water layers which reflects the ability to prevent the water spreading. The most superhydrophobic and durable hybrid coating with 1.8 g Fe3O4, shows the smallest adhesion force, as expected, indicating this surface possesses the weakest initial water adhesive strength. The resulting low-adhesive superhydrophobic coating shows a good self-cleaning ability. This fabrication of low-adhesive and durable superhydrophobic Fe3O4/FLG hybrid coatings advances a better understanding of the physics of wetting and yield a prospective candidate for various practical applications, such as self-cleaning, microfluidic devices, etc. Strongly interactive graphene micro-sheets tailored by Fe3O4 nanoparticles exhibit low-adhesive and durable superhydrophobicity.![]()
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Affiliation(s)
- Muqiu Wu
- Herbert Gleiter Institute of Nanoscience
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
| | - Rong An
- Herbert Gleiter Institute of Nanoscience
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
- Center for Nanotechnology and Physical Institute
| | - Sudheer Kumar Yadav
- Herbert Gleiter Institute of Nanoscience
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
| | - Xiaohong Jiang
- International Chinese-Belarusian Scientific Laboratory on Vacuum-Plasma Technology
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
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