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Li Z, Zhang L, Wu H. A Regulable Polyporous Graphite/Melamine Foam for Heat Conduction, Sound Absorption and Electromagnetic Wave Absorption. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305120. [PMID: 37926783 DOI: 10.1002/smll.202305120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/03/2023] [Indexed: 11/07/2023]
Abstract
To reduce electromagnetic interference and noise pollution within communication base stations and servers, it is necessary for electromagnetic wave absorption (EWA) materials to transition from coating to multifunctional devices. Up to now, the stable and effective integration of multiple functions into one material by a simple method has remained a large challenge. Herein, a foam-type microwave absorption device assembled with multicomponent organic matter and graphite powder is synthesized by a universal combination process. Melamine and phenolic aldehyde amine work as the skeleton and cementing compound, respectively, in which graphite is embedded in the cementing compound interconnected into the mesoscopic 3D electric conductive and heat conductive network. Interestingly, the prepared flexible graphite/melamine foam (CMF) delivers a great EWA performance, with a great effective absorption bandwidth of 9.8 GHz, ultrathin thickness of 2.60 mm, and a strong absorption reflection loss of -41.7 dB. Moreover, the CMF possesses porosity and flexibility, endowing it with sound absorption ability. The CMF is unique in its integration of EWA, heat conduction, sound absorption, and mechanical robustness, as well as its cost-effective and scalable manufacturing. These attributes make CMF promising as a multifunctional device widely used in communication base stations, servers, and chips protection.
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Affiliation(s)
- Zijing Li
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Limin Zhang
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Hongjing Wu
- MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, China
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Li N, Shi JF, Zhang F, Jia LC, Wang YY, Yan DX, Li ZM. Peelable Microwave Absorption Coating with Reusable and Anticorrosion Merits. ACS APPLIED MATERIALS & INTERFACES 2024; 16:6462-6473. [PMID: 38266189 DOI: 10.1021/acsami.3c17805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
The peelable microwave absorption (MA) coating with reversible adhesion for stable presence on substrates and easy release without any residuals is highly desired in temporary electromagnetic protection, which can quickly enter and disengage the electromagnetic protection state according to the real-time changeable harsh surroundings. On the contrary, with the incorporation of abundant absorbent to achieve excellent MA ability, the tunable adhesion and sufficient cohesion are extremely challenging to fulfill the above requirement. The reported peelable coatings still have problems in controlling adhesion/cohesion strength and coating release, facing substantial residuals after peeling even using complex chemical modification or abundant additives. Herein, a peelable MA coating based on the block characteristics of polar and nonpolar segments of poly(styrene-(ethylene-co-butylene)-styrene) (SEBS) is successfully developed. The polyaniline-decorated carbon nanotube as a microwave absorber plays a positive influence on the adhesion/cohesion of the coating due to bonding interaction. The competitive effective absorption bandwidth (EAB) of 8.8 GHz and controllable yet reversible adhesion release on various substrates and complex surfaces have been achieved. The reusability endows peelable MA coating with 93% retention of EAB even after ten coating-peeling cycles. The coating with excellent chemical and adhesion stability can effectively protect substrates from salt/acid/alkali corrosion, showing over 98% retention of EAB even after 8 h of accelerated corrosion. Our peelable MA coating via a general yet reliable approach provides a prospect for temporary electromagnetic protection.
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Affiliation(s)
- Nan Li
- School of Aeronautics and Astronautics, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China
| | - Jun-Feng Shi
- School of Aeronautics and Astronautics, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China
| | - Feng Zhang
- School of Aeronautics and Astronautics, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China
| | - Li-Chuan Jia
- College of Electrical Engineering, Sichuan University, Chengdu 610065, China
| | - Yue-Yi Wang
- School of Aeronautics and Astronautics, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China
| | - Ding-Xiang Yan
- School of Aeronautics and Astronautics, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 10029, China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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Zhao Y, Hao L, Zhang X, Tan S, Li H, Zheng J, Ji G. A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect. SMALL SCIENCE 2021. [DOI: 10.1002/smsc.202100077] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Yue Zhao
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Lele Hao
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Xindan Zhang
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Shujuan Tan
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Haohang Li
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Jing Zheng
- Department of Chemistry and Materials Science College of Science Nanjing Forestry University Nanjing 210037 P. R. China
| | - Guangbin Ji
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
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Park J, Kim M, Choi S, Sun JY. Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites. Sci Rep 2020; 10:21689. [PMID: 33303837 PMCID: PMC7730400 DOI: 10.1038/s41598-020-78663-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 11/27/2020] [Indexed: 11/10/2022] Open
Abstract
With the growing risk of radiation exposure, there are growing interests in radiation shielding. Because most radiation shields are made from heavy metals, a need to develop a soft shield is raised to protect human body. However, because the shield can easily undergo a mechanical damage by an impact, it would be better to have self-repairing system in the shield. Here, we have fabricated an intrinsic self-healable soft shield for gamma ray by making acrylamide based hydrogel composite. The composite contains lead dioxide nanoparticles for gamma ray shielding and Laponite clays for self-repairing. Although the hydrogel contained a large amount of lead dioxide nanoparticles (3.23 M), the fabricated composites stretched beyond 1400% while showing a high attenuation coefficient of 0.1343 cm-1 against gamma ray from a cobalt-60 source. Then a systematic study was performed to analyze self-healing properties and the 96.55% of maximum self-healing efficiency was obtained. We also analyzed a storage modulus of hydrogel and molecular weight of polyacrylamide to study an effect of gamma ray on the self-healing. The self-healing efficiency was decreased by a gamma ray because the radiation induces scissioning or covalent crosslinking in the chains.
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Affiliation(s)
- Jinwoo Park
- Department of Material Science and Engineering, Seoul National University, Seoul, 08826, South Korea
| | - Minseok Kim
- Department of Nuclear and Energy Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Sooseok Choi
- Department of Nuclear and Energy Engineering, Jeju National University, Jeju, 63243, Republic of Korea
| | - Jeong-Yun Sun
- Department of Material Science and Engineering, Seoul National University, Seoul, 08826, South Korea.
- Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, South Korea.
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Muradyan H, Mozhdehi D, Guan Z. Self-healing magnetic nanocomposites with robust mechanical properties and high magnetic actuation potential prepared from commodity monomers via graft-from approach. Polym Chem 2020. [DOI: 10.1039/c9py01700c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the design, synthesis and characterization of self-healing magnetic nanocomposites prepared from readily available commodity monomers.
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Affiliation(s)
- Hurik Muradyan
- Department of Chemistry
- University of California
- Irvine
- USA
| | - Davoud Mozhdehi
- Department of Chemistry
- Syracuse University
- 1-014 Center for Science and Technology
- Syracuse
- USA 13244
| | - Zhibin Guan
- Department of Chemistry
- University of California
- Irvine
- USA
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Song MM, Wang YM, Liang XY, Zhang XQ, Zhang S, Li BJ. Functional materials with self-healing properties: a review. SOFT MATTER 2019; 15:6615-6625. [PMID: 31406972 DOI: 10.1039/c9sm00948e] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Self-healing materials (SHMs) have been a research hot topic in recent years owing to their greatly improved longevity and safety in practical applications. Recently, research on SHMs has gradually expanded from structural materials to functional materials. Functional materials with self-healing properties (FMSH) require simultaneous repairing not only of the mechanical properties but of the functionalities from damaged cracks or wounds. It is more challenging to introduce both self-healing properties and a particular functionality to materials owing to the difficulties of preparing the materials and their more complex healing mechanism. Herein, we summarize the recent progress that has been made in FMSH, put forward insights from the perspectives of material preparation and healing mechanisms and highlight future developments for FMSH.
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Affiliation(s)
- Meng-Meng Song
- State Key Laboratory of Polymer Materials Engineering (Sichuan University), Polymer Research Institute of Sichuan University, Chengdu 610065, China.
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Hou JB, Zhang XQ, Wu D, Feng JF, Ke D, Li BJ, Zhang S. Tough Self-Healing Elastomers Based on the Host-Guest Interaction of Polycyclodextrin. ACS APPLIED MATERIALS & INTERFACES 2019; 11:12105-12113. [PMID: 30848121 DOI: 10.1021/acsami.9b00626] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Inspired by animal muscles, we developed a kind of tough elastomers combining high strength and high stretchability with autonomous self-healing capability. A key structural feature is the construction of a double network (DN) connected by the hydrogen bond and host-guest interactions. The first network is the classic elastomer polyacrylate matrix cross-linked by strong hydrogen bonding. The second network is formed through the host-guest interactions between polycyclodextrin and the adamantane (Ad) groups on the side of the polyacrylate chain. Supramolecular interactions between two networks make them miscible and interpenetrate in the molecular level and then can share the load as the sample was stretched. The host-guest interactions act not only as sacrificial bonds for energy dissipation but also as self-healing driving forces. The tensile strength of the DN elastomer reaches about 6.7 MPa and the strain is as high as about 950%. The DN elastomer can be easy to repair by touching the damaged surface together at ambient conditions when broken or cut. The recovered tensile strength can reach over 4.5 MPa, which is better than the most pristine strength of existing spontaneous self-healing elastomers.
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Affiliation(s)
- Jun-Bo Hou
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Xiao-Qin Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Di Wu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Sichuan University , Chengdu 610065 , Sichuan , China
| | - Jun-Feng Feng
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , Sichuan , China
| | - Duo Ke
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , Sichuan , China
| | - Bang-Jing Li
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology , Chinese Academy of Sciences , Chengdu 610041 , Sichuan , China
| | - Sheng Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Sichuan University , Chengdu 610065 , Sichuan , China
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Zhang Q, Liu C, Ju G, Cheng M, Shi F. Macroscopic Supramolecular Assembly through Electrostatic Interactions Based on a Flexible Spacing Coating. Macromol Rapid Commun 2018; 39:e1800180. [PMID: 29749034 DOI: 10.1002/marc.201800180] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/25/2018] [Indexed: 12/14/2022]
Abstract
Macroscopic supramolecular assembly (MSA) is a recent advance in supramolecular chemistry that involves associating large building blocks with a size larger than 10 µm through noncovalent interactions. However, until now the applicable material system is rather limited to hydrogels, and MSA of rigid materials with supramolecular interactions widely used in molecular assembly has rarely been reported due to the difficulty in achieving multivalency between rigid surfaces. Herein, the concept of flexible spacing coating is applied with highly flowable properties, and the electrostatic-interaction-driven MSA of relatively rigid polydimethylsiloxane building blocks is demonstrated. With the flexible spacing coating of a polyelectrolyte multilayer, the oppositely charged rigid building blocks can realize MSA under shaking in water for 5 min. The major contribution of the electrostatic interaction is confirmed by both qualitative controlled MSA experiments in other solvents, disassembly in ionic solution and quantitative results with an in situ force measurement method.
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Affiliation(s)
- Qian Zhang
- State Key Laboratory of Organic-Inorganic Composites & Beijing Laboratory of Biomedical Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Chongxian Liu
- State Key Laboratory of Organic-Inorganic Composites & Beijing Laboratory of Biomedical Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Guannan Ju
- State Key Laboratory of Organic-Inorganic Composites & Beijing Laboratory of Biomedical Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Mengjiao Cheng
- State Key Laboratory of Organic-Inorganic Composites & Beijing Laboratory of Biomedical Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Feng Shi
- State Key Laboratory of Organic-Inorganic Composites & Beijing Laboratory of Biomedical Materials & Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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