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Liang J, Xu J, Zheng J, Zhou L, Yang W, Liu E, Zhu Y, Zhou Q, Liu Y, Wang R, Liu Z. Bioinspired Mechanically Robust and Recyclable Hydrogel Microfibers Based on Hydrogen-Bond Nanoclusters. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401278. [PMID: 38622885 PMCID: PMC11186113 DOI: 10.1002/advs.202401278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 03/25/2024] [Indexed: 04/17/2024]
Abstract
Mechanically robust hydrogel fibers have demonstrated great potential in energy dissipation and shock-absorbing applications. However, developing such materials that are recyclable, energy-efficient, and environmentally friendly remains an enormous challenge. Herein, inspired by spider silk, a continuous and scalable method is introduced for spinning a polyacrylamide hydrogel microfiber with a hierarchical sheath-core structure under ambient conditions. Applying pre-stretch and twist in the as-spun hydrogel microfibers results in a tensile strength of 525 MPa, a toughness of 385 MJ m-3, and a damping capacity of 99%, which is attributed to the reinforcement of hydrogen-bond nanoclusters within the microfiber matrix. Moreover, it maintains both structural and mechanical stability for several days, and can be directly dissolved in water, providing a sustainable spinning dope for re-spinning into new microfibers. This work provides a new strategy for the spinning of robust and recyclable hydrogel-based fibrous materials.
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Affiliation(s)
- Jingye Liang
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Jishuai Xu
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Jingxuan Zheng
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Lijuan Zhou
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Weiping Yang
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Enzhao Liu
- Tianjin Key Laboratory of Ionic‐Molecular Function of Cardiovascular diseaseDepartment of CardiologyTianjin Institute of Cardiologythe Second Hospital of Tianjin Medical UniversityTianjin300211China
| | - Yutian Zhu
- College of MaterialsChemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou311121China
| | - Qiang Zhou
- Department of OrthopaedicsTianjin First Central HospitalNankai UniversityTianjinChina
| | - Yong Liu
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Run Wang
- School of Textile Science and EngineeringTiangong University399 West Binshui RoadTianjin300387China
| | - Zunfeng Liu
- State Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Functional Polymer MaterialsCollege of Chemistry Frontiers Science Center for New Organic MatterNankai University94 Weijin RoadTianjin300071China
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2
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Lin W, Wu S, Han S, Xie J, He H, Zou Q, Xu D, Ning D, Mondal AK, Huang F. Preparation and characterization of highly conductive lignin aerogel based on tunicate nanocellulose framework. Int J Biol Macromol 2023:125010. [PMID: 37217060 DOI: 10.1016/j.ijbiomac.2023.125010] [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: 03/30/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 05/24/2023]
Abstract
The highly conductive and elastic three-dimensional mesh porous material is an ideal platform for the fabrication of high electrical conductivity conductive aerogels. Herein, a multifunctional aerogel that is lightweight, highly conductive and stable sensing properties is reported. Tunicate nanocellulose (TCNCs) with a high aspect ratio, high Young's modulus, high crystallinity, good biocompatibility and biodegradability was used as the basic skeleton to prepare aerogel by freeze-drying technique. Alkali lignin (AL) was used as the raw material, polyethylene glycol diglycidyl ether (PEGDGE) was used as the cross-linking agent, and polyaniline (PANI) was used as the conductive polymer. Preparation of aerogels by freeze-drying technique, in situ synthesis of PANI, and construction of highly conductive aerogel from lignin/TCNCs. The structure, morphology and crystallinity of the aerogel were characterized by FT-IR, SEM, and XRD. The results show that the aerogel has good conductivity (as high as 5.41 S/m) and excellent sensing performance. When the aerogel was assembled as a supercapacitor, the maximum specific capacitance can reach 772 mF/cm2 at 1 mA/cm2 current density, and maximum power and energy density can reach 59.4 μWh/cm2 and 3600 μW/cm2, respectively. It is expected the aerogel can be applied in the field of wearable devices and electronic skin.
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Affiliation(s)
- Weijie Lin
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Shuai Wu
- College of Material Science and Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
| | - Shibo Han
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Jie Xie
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Hongshen He
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Qiuxia Zou
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Dezhong Xu
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Dengwen Ning
- Yibin Forest and Bamboo Industry Research Institute, Yibin 644000, Sichuan, China
| | - Ajoy Kanti Mondal
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China; Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Fang Huang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China.
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3
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Bobenko N, Egorushkin V, Ponomarev A. Hysteresis in Heat Capacity of MWCNTs Caused by Interface Behavior. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3139. [PMID: 36144926 PMCID: PMC9503709 DOI: 10.3390/nano12183139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/31/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
The paper is concerned with the study of structural disorder as well as the emergence and causes of heat capacity hysteresis in multiwall carbon nanotubes. The investigation methods are X-ray diffraction analysis, Raman spectroscopy, transmission electron microscopy, and calorimetric tests: thermogravimetric analysis, differential scanning calorimetry, and the thermal relaxation method for heat capacity hysteresis. Multiwall carbon nanotubes are shown to be composed of one or several types of zigzag-armchair domains. The domain structure of nanotube samples is responsible for the generation of uniaxial elastic microstrains and viscoelastic bending strains at domain interfaces. The thermomechanical behavior of interfaces is the chief cause of temperature hysteresis of heat capacity. The number of hystereses corresponds to the number of domain types in the structure, and values of hysteresis are determined by the crystallite size, thermal conductivity, and normal temperature distribution of strain. The found mechanism of heat capacity hysteresis can be helpful in preventing jumps in thermal properties and managing thermal memory in multiwall carbon nanotubes.
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Jung W, Choe Y, Kim T, Ok JG, Lee HH, Kim YH. High-permeability vacuum membrane distillation utilizing mechanically compressed carbon nanotube membranes. RSC Adv 2022; 12:201-206. [PMID: 35424500 PMCID: PMC8978618 DOI: 10.1039/d1ra08042c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 12/10/2021] [Indexed: 11/21/2022] Open
Abstract
High-permeable vacuum membrane distillation by applying vertically aligned carbon nanotube for the first time.
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Affiliation(s)
- Woosang Jung
- Department of Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Younjeong Choe
- Department of Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Taewoo Kim
- Department of Mechanical Engineering, Incheon National University, Incheon 22012, Republic of Korea
| | - Jong G. Ok
- Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | - Hong H. Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Yong Hyup Kim
- Department of Aerospace Engineering, Seoul National University, Seoul 08826, Republic of Korea
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5
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Zhang W, Ma F, Meng Z, Kong L, Dai Z, Zhao G, Zhu A, Liu X, Lin N. Green Synthesis of Waterborne Polyurethane for High Damping Capacity. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202000457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wenhai Zhang
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
| | - Fangxing Ma
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
| | - Zhaohui Meng
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
| | - Lingqing Kong
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
| | - Ziyang Dai
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
| | - Guangxing Zhao
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
| | - Anna Zhu
- State Key Laboratory of NBC Protection for Civilian Beijing 102205 China
| | - Xiang‐Yang Liu
- Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117542 Singapore
| | - Naibo Lin
- College of Materials Research Institution for Biomimetics and Soft Matter Fujian Key Provincial Laboratory for Soft Functional Materials Research Xiamen University 422 Siming South Road Xiamen 361005 China
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Jarząbek DM, Harvey C, Levintant-Zayonts N, Wojciechowski T, Gniadek M, Krajewski M, Pathak S. Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N + ion irradiation. NANOTECHNOLOGY 2020; 31:285703. [PMID: 32244241 DOI: 10.1088/1361-6528/ab8665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work we apply N+ ion irradiation on vertically aligned carbon nanotube (VACNT) arrays in order to increase the number of connections and joints in the CNT network. The ions energy was 50 keV and fluence 5 × 1017 ions cm-2. The film was 160 μm thick. SEM images revealed the ion irradiation altered the carbon bonding and created a sponge-like, brittle structure at the surface of the film, with the ion irradiation damage region extending ∼4 μm in depth. TEM images showed the brittle structure consists of amorphous carbon forming between nanotubes. The significant enhancement of mechanical properties of the irradiated sample studied by the cyclic nanoindentation with a flat punch indenter was observed. Irradiation on the VACNT film made the structure stiffer, resulted in a higher percentage recovery, and reduced the energy dissipation under compression. The results are encouraging for further studies which will lead to create a class of materials-ion-irradiated VACNT films-which after further research may find application in storage or harvesting energy at the micro/nanoscale.
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Affiliation(s)
- Dariusz M Jarząbek
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland. Warsaw University of Technology, Faculty of Mechatronics, Warsaw, Poland
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7
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Dou Y, Wang ZP, He W, Jia T, Liu Z, Sun P, Wen K, Gao E, Zhou X, Hu X, Li J, Fang S, Qian D, Liu Z. Artificial spider silk from ion-doped and twisted core-sheath hydrogel fibres. Nat Commun 2019; 10:5293. [PMID: 31757964 PMCID: PMC6874677 DOI: 10.1038/s41467-019-13257-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 10/24/2019] [Indexed: 12/20/2022] Open
Abstract
Spider silks show unique combinations of strength, toughness, extensibility, and energy absorption. To date, it has been difficult to obtain spider silk-like mechanical properties using non-protein approaches. Here, we report on an artificial spider silk produced by the water-evaporation-induced self-assembly of hydrogel fibre made from polyacrylic acid and silica nanoparticles. The artificial spider silk consists of hierarchical core-sheath structured hydrogel fibres, which are reinforced by ion doping and twist insertion. The fibre exhibits a tensile strength of 895 MPa and a stretchability of 44.3%, achieving mechanical properties comparable to spider silk. The material also presents a high toughness of 370 MJ m-3 and a damping capacity of 95%. The hydrogel fibre shows only ~1/9 of the impact force of cotton yarn with negligible rebound when used for impact reduction applications. This work opens an avenue towards the fabrication of artificial spider silk with applications in kinetic energy buffering and shock-absorbing.
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Grants
- the National Key Research and Development Program of China (grant 2017YFB0307000), the National Natural Science Foundation of China (grants U1533122 and 51773094), the National Robotics Programme (Grant 172 25 00063) funded by A*STAR-SERC, Singapore, the Natural Science Foundation of Tianjin (grant 18JCZDJC36800), the Science Foundation for Distinguished Young Scholars of Tianjin (grant 18JCJQJC46600), the Fundamental Research Funds for the Central Universities (grant 63171219), the State Key Laboratory for Modification of Chemical Fibres and Polymer Materials, Donghua University LK1704, the Fundamental Research Funds for the Central Universities (grant 63191139), the National Science Foundation (grant CMMI-1727960).
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Affiliation(s)
- Yuanyuan Dou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
| | - Zhen-Pei Wang
- Institute of High Performance Computing, A*STAR Research Entities, Singapore, 138632, Singapore
| | - Wenqian He
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
| | - Tianjiao Jia
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
| | - Zhuangjian Liu
- Institute of High Performance Computing, A*STAR Research Entities, Singapore, 138632, Singapore
| | - Pingchuan Sun
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
| | - Kai Wen
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
- Department of Science, China Pharmaceutical University, 211198, Nanjing, Jiangsu, China
| | - Enlai Gao
- Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, 430072, Wuhan, Hubei, China
| | - Xiang Zhou
- Department of Science, China Pharmaceutical University, 211198, Nanjing, Jiangsu, China
| | - Xiaoyu Hu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
| | - Jingjing Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China
| | - Shaoli Fang
- Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Dong Qian
- Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Zunfeng Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials, Nankai University, 300071, Tianjin, China.
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8
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Faraji S, Stano K, Akyildiz H, Yildiz O, Jur JS, Bradford PD. Modifying the morphology and properties of aligned CNT foams through secondary CNT growth. NANOTECHNOLOGY 2018; 29:295602. [PMID: 29697060 DOI: 10.1088/1361-6528/aac03c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In this work, we report for the first time, growth of secondary carbon nanotubes (CNTs) throughout a three-dimensional assembly of CNTs. The assembly of nanotubes was in the form of aligned CNT/carbon (ACNT/C) foams. These low-density CNT foams were conformally coated with an alumina buffer layer using atomic layer deposition. Chemical vapor deposition was further used to grow new CNTs. The CNT foam's extremely high porosity allowed for growth of secondary CNTs inside the bulk of the foams. Due to the heavy growth of new nanotubes, density of the foams increased more than 2.5 times. Secondary nanotubes had the same graphitic quality as the primary CNTs. Microscopy and chemical analysis revealed that the thickness of the buffer layer affected the diameter, nucleation density as well as growth uniformity across the thickness of the foams. The effects of secondary nanotubes on the compressive mechanical properties of the foams was also investigated.
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Affiliation(s)
- Shaghayegh Faraji
- Department of Textile Engineering, Chemistry and Science, North Carolina State University, Campus Box 8301, Raleigh, NC 27695, United States of America
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9
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Ping L, Hou PX, Liu C, Li J, Zhao Y, Zhang F, Ma C, Tai K, Cong H, Cheng HM. Surface-restrained growth of vertically aligned carbon nanotube arrays with excellent thermal transport performance. NANOSCALE 2017; 9:8213-8219. [PMID: 28580987 DOI: 10.1039/c7nr01529a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A vertically aligned carbon nanotube (VACNT) array is a promising candidate for a high-performance thermal interface material in high-power microprocessors due to its excellent thermal transport property. However, its rough and entangled free tips always cause poor interfacial contact, which results in serious contact resistance dominating the total thermal resistance. Here, we employed a thin carbon cover to restrain the disorderly growth of the free tips of a VACNT array. As a result, all the free tips are seamlessly connected by this thin carbon cover and the top surface of the array is smoothed. This unique structure guarantees the participation of all the carbon nanotubes in the array in the heat transport. Consequently the VACNT array grown on a Cu substrate shows a record low thermal resistance of 0.8 mm2 K W-1 including the two-sided contact resistances, which is 4 times lower than the best result previously reported. Remarkably, the VACNT array can be easily peeled away from the Cu substrate and act as a thermal pad with excellent flexibility, adhesive ability and heat transport capability. As a result the CNT array with a thin carbon cover shows great potential for use as a high-performance flexible thermal interface material.
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Affiliation(s)
- Linquan Ping
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, P. R. China.
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10
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Thevamaran R, Saini D, Karakaya M, Zhu J, Podila R, Rao AM, Daraio C. Impact absorption properties of carbon fiber reinforced bucky sponges. NANOTECHNOLOGY 2017; 28:184002. [PMID: 28338473 DOI: 10.1088/1361-6528/aa6904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We describe the super compressible and highly recoverable response of bucky sponges as they are struck by a heavy flat-punch striker. The bucky sponges studied here are structurally stable, self-assembled mixtures of multiwalled carbon nanotubes (MWCNTs) and carbon fibers (CFs). We engineered the microstructure of the sponges by controlling their porosity using different CF contents. Their mechanical properties and energy dissipation characteristics during impact loading are presented as a function of their composition. The inclusion of CFs improves the impact force damping by up to 50% and the specific damping capacity by up to 7% compared to bucky sponges without CFs. The sponges also exhibit significantly better stress mitigation characteristics compared to vertically aligned CNT foams of similar densities. We show that delamination occurs at the MWCNT-CF interfaces during unloading, and it arises from the heterogeneous fibrous microstructure of the bucky sponges.
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Affiliation(s)
- Ramathasan Thevamaran
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, United States of America. Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, United States of America
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11
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Wu P, Cheng S, Yang L, Lin Z, Gui X, Ou X, Zhou J, Yao M, Wang M, Zhu Y, Liu M. Synthesis and Characterization of Self-Standing and Highly Flexible δ-MnO2@CNTs/CNTs Composite Films for Direct Use of Supercapacitor Electrodes. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23721-8. [PMID: 27561652 DOI: 10.1021/acsami.6b07161] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Self-standing and flexible films worked as pseudocapacitor electrodes have been fabricated via a simple vacuum-filtration procedure to stack δ-MnO2@carbon nanotubes (CNTs) composite layer and pure CNT layer one by one with CNT layers ended. The lightweight CNTs layers served as both current collector and supporter, while the MnO2@CNTs composite layers with birnessite-type MnO2 worked as active layer and made the main contribution to the capacitance. At a low discharge current of 0.2 A g(-1), the layered films displayed a high areal capacitance of 0.293 F cm(-2) with a mass of 1.97 mg cm(-2) (specific capacitance of 149 F g(-1)) and thickness of only 16.5 μm, and hence an volumetric capacitance of about 177.5 F cm(-3). Moreover, the films also exhibited a good rate capability (only about 15% fading for the capacitance when the discharge current increased to 5 A g(-1) from 0.2 A g(-1)), outstanding cycling stability (about 90% of the initial capacitance was remained after 5,000 cycles) and high flexibility (almost no performance change when bended to different angles). In addition, the capacitance of the films increased proportionally with the stacked layers and the geometry area. E.g., when the stacked layers were three times many with a mass of 6.18 mg cm(-2), the areal capacitance of the films was increased to 0.764 F cm(-2) at 0.5 A g(-1), indicating a high electronic conductivity. It is not overstated to say that the flexible and lightweight layered films emerged high potential for future practical applications as supercapacitor electrodes.
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Affiliation(s)
- Peng Wu
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Shuang Cheng
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Lufeng Yang
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Zhiqiang Lin
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Xuchun Gui
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University , Guangzhou 510275, China
| | - Xing Ou
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Jun Zhou
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Minghai Yao
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Mengkun Wang
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Yuanyuan Zhu
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
| | - Meilin Liu
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center , Guangzhou, Guangdong 510006, China
- School of Materials Science and Engineering, Georgia Institute of Technology , 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
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12
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Jagtap P, Kumar A, Kumar P. Effect of electric field on creep and stress-relaxation behavior of carbon nanotube forests. RSC Adv 2016. [DOI: 10.1039/c6ra16091c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon nanotube forests (CNTFs) are porous ensembles of vertically aligned carbon nanotubes, exhibiting excellent reversible compressibility and electric field tunable stress–strain, creep, and viscoelastic responses.
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Affiliation(s)
- Piyush Jagtap
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Amit Kumar
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Praveen Kumar
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
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13
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Faraji S, Stano KL, Yildiz O, Li A, Zhu Y, Bradford PD. Ultralight anisotropic foams from layered aligned carbon nanotube sheets. NANOSCALE 2015; 7:17038-47. [PMID: 26419855 DOI: 10.1039/c5nr03899e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In this work, we present large scale, ultralight aligned carbon nanotube (CNT) structures which have densities an order of magnitude lower than CNT arrays, have tunable properties and exhibit resiliency after compression. By stacking aligned sheets of carbon nanotubes and then infiltrating with a pyrolytic carbon (PyC), resilient foam-like materials were produced that exhibited complete recovery from 90% compressive strain. With density as low as 3.8 mg cm(-3), the foam structure is over 500 times less dense than bulk graphite. Microscopy revealed that PyC coated the junctions among CNTs, and also increased CNT surface roughness. These changes in the morphology explain the transition from inelastic behavior to foam-like recovery of the layered CNT sheet structure. Mechanical and thermal properties of the foams were tuned for different applications through variation of PyC deposition duration while dynamic mechanical analysis showed no change in mechanical properties over a large temperature range. Observation of a large and linear electrical resistance change during compression of the aligned CNT/carbon (ACNT/C) foams makes strain/pressure sensors a relevant application. The foams have high oil absorption capacities, up to 275 times their own weight, which suggests they may be useful in water treatment and oil spill cleanup. Finally, the ACNT/C foam's high porosity, surface area and stability allow for demonstration of the foams as catalyst support structures.
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Affiliation(s)
- Shaghayegh Faraji
- Department of Textile Engineering, Chemistry and Science, North Carolina State University, Campus Box 8301, Raleigh, NC 27695, USA.
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