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Lee I, Kim J, Yun S, Jang J, Cho SY, Cho JS, Ryu JH, Choi D, Cho C. Synergistic Combination of Dual Clays in Multilayered Nanocomposites for Enhanced Flame Retardant Properties. ACS OMEGA 2024; 9:6606-6615. [PMID: 38371790 PMCID: PMC10870267 DOI: 10.1021/acsomega.3c07534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 02/20/2024]
Abstract
In an effort to reduce the flammability of synthetic polymeric materials such as cotton fabrics and polyurethane foam (PUF), hybrid nanocoatings are prepared by layer-by-layer assembly. Multilayered nanocomposites of a cationic polyelectrolyte, poly(diallyldimethylammonium chloride) (PDDA), are paired with two kinds of clay nanoplatelets, montmorillonite (MMT) and vermiculite (VMT). The physical properties such as thickness and mass and thermal behaviors in clay-based nanocoatings with and without incorporation of tris buffer are compared to assess the effectiveness of amine salts on flame retardant (FR) performances. A PDDA-tris/VMT-MMT system, in which tris buffer is introduced into the cationic PDDA aqueous solution, produces a thicker and heavier coating. Three different systems, including PDDA/MMT, PDDA/VMT-MMT, and PDDA-tris/VMT-MMT, result in conformal coating, retaining the weave structure of the fabrics after being exposed to a vertical and horizontal flame test, while the uncoated sample is completely burned out. The synergistic effects of dual clay-based hybrid nanocoatings are greatly improved by adding amine salts. Cone calorimetry reveals that the PDDA-tris/VMT-MMT-coated PUF eliminates a second peak heat release rate and significantly reduces other FR performances, compared to those obtained from the clay-based multilayer films with no amine salts added. Ten bilayers of PDDA-tris/VMT-MMT (≈250 nm thick) maintain the shape of foam after exposure to a butane torch flame for 12 s. As for practical use of these nanocomposites in real fire disasters, spray-assisted PDDA-tris/VMT-MMT multilayers on woods exhibit high resistance over flammability. Improved fire resistance in PDDA-tris/VMT-MMT is believed to be due to the enhanced char yield through the addition of tris buffer that promotes the deposition of more clay particles while retaining a highly ordered deposition of a densely packed nanobrick wall structure. This work demonstrates the ability to impart significant fire resistance to synthetic polymer materials in a fully renewable nanocoating that uses environmentally benign chemistry.
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Affiliation(s)
- Inyoung Lee
- Department
of Carbon Convergence Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea
| | - Jinhong Kim
- Department
of Carbon Convergence Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea
| | - Sehui Yun
- Department
of Carbon Convergence Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea
| | - Junho Jang
- Wearable
Platform Materials Technology Center (WMC), Department of Materials
Science and Engineering, Korea Advanced
Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Se Youn Cho
- Carbon
Composite Materials Research Center, Korea
Institute of Science and Technology, 92 Chudong-ro Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
| | - Jung Sang Cho
- Department
of Engineering Chemistry, Chungbuk National
University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Ji Hyun Ryu
- Department
of Carbon Convergence Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea
| | - Dongwhi Choi
- Department
of Mechanical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic
of Korea
| | - Chungyeon Cho
- Department
of Carbon Convergence Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea
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Cao H, Luo Y, Jiao W, Lei W, Han S, Liu H. Stacking-induced phonon transport engineering of siligene. NANOTECHNOLOGY 2024; 35:185702. [PMID: 38271731 DOI: 10.1088/1361-6528/ad22b4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/24/2024] [Indexed: 01/27/2024]
Abstract
Tunable phonon transport properties of two-dimensional materials are desirable for effective heat management in various application scenarios. Here, we demonstrate by first-principles calculations and Boltzmann transport theory that the lattice thermal conductivity of siligene could be efficiently engineered by forming various stacking configurations. Unlike few-layer graphene, the stacked siligenes are found to be covalently bonded along the out-of-plane direction, which leads to unique dependence of the thermal conductivity on both the stacking order and layer number. Due to the restricted flexural phonon scattering induced by the horizontal reflection symmetry, the AA stacking configuration of bilayer siligene exhibits obviously higher thermal conductivity compared with the AB stacking. In addition, we observe increasing thermal conductivity with the layer number, as evidenced by the reduced phonon scattering phase space and Grüneisen parameter. Interestingly, the Fuchs-Sondheimer model works well for the thickness-dependent thermal conductivity of stacked siligenes.
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Affiliation(s)
- Haibin Cao
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Yufeng Luo
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Wenyan Jiao
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Wen Lei
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Shihao Han
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Huijun Liu
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
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Iverson E, Legendre H, Chavan SV, Aryal A, Singh M, Chakravarty S, Schmieg K, Chiang HC, Shamberger PJ, Karim A, Grunlan JC. Nanobrick Wall Multilayer Thin Films with High Dielectric Breakdown Strength. ACS APPLIED ENGINEERING MATERIALS 2023; 1:2429-2439. [PMID: 38356862 PMCID: PMC10862474 DOI: 10.1021/acsaenm.3c00439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 02/16/2024]
Abstract
Current thermally conductive and electrically insulating insulation systems are struggling to meet the needs of modern electronics due to increasing heat generation and power densities. Little research has focused on creating insulation systems that excel at both dissipating heat and withstanding high voltages (i.e., have both high thermal conductivity and a high breakdown strength). Herein, a polyelectrolyte-based multilayer nanocomposite is demonstrated to be a thermally conductive high-voltage insulation. Through inclusion of both boehmite and vermiculite clay, the breakdown strength of the nanocomposite was increased by ≈115%. It was also found that this unique nanocomposite has an increase in its breakdown strength, modulus, and hydrophobicity when exposed to elevated temperatures. This readily scalable insulation exhibits a remarkable combination of breakdown strength (250 kV/mm) and thermal conductivity (0.16 W m-1 K-1) for a polyelectrolyte-based nanocomposite. This dual clay insulation is a step toward meeting the needs of the next generation of high-performance insulation systems.
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Affiliation(s)
- Ethan
T. Iverson
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Hudson Legendre
- Department
of Mechanical Engineering, Texas A&M
University, College Station, Texas 77843, United States
| | - Shubham V. Chavan
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Anil Aryal
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77843, United States
| | - Maninderjeet Singh
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Sourav Chakravarty
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77843, United States
| | - Kendra Schmieg
- Department
of Mechanical Engineering, Texas A&M
University, College Station, Texas 77843, United States
| | - Hsu-Cheng Chiang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Patrick J. Shamberger
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77843, United States
| | - Alamgir Karim
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Jaime C. Grunlan
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Department
of Mechanical Engineering, Texas A&M
University, College Station, Texas 77843, United States
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77843, United States
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4
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Wang Z, Yang L, Dai L, Huang Z, Wu K, Liu B. Scalable Production of 2D Minerals by Polymer Intercalation and Adhesion for Multifunctional Applications. SMALL METHODS 2023; 7:e2300529. [PMID: 37246257 DOI: 10.1002/smtd.202300529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/17/2023] [Indexed: 05/30/2023]
Abstract
Natural and sustainable 2D minerals have many unique properties and may reduce reliance on petroleum-based products. However, the large-scale production of 2D minerals remains challenging. Herein, a green, scalable, and universal polymer intercalation and adhesion exfoliation (PIAE) method to produce 2D minerals such as vermiculite, mica, nontronite, and montmorillonite with large lateral sizes and high efficiency, is developed. The exfoliation relies on the dual functions of polymers involving intercalation and adhesion to expand interlayer space and weaken interlayer interactions of minerals, facilitating their exfoliation. Taking vermiculite as an example, the PIAE produces 2D vermiculite with an average lateral size of 1.83 ± 0.48 µm and thickness of 2.40 ± 0.77 nm at a yield of ≈30.8%, surpassing state-of-the-art methods in preparing 2D minerals. Flexible films are directly fabricated by the 2D vermiculite/polymer dispersion, exhibiting outstanding performances including mechanical strength, thermal resistance, ultraviolet shielding, and recyclability. The representative application of colorful multifunctional window coatings in sustainable buildings is demonstrated, indicating the potential of massively produced 2D minerals.
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Affiliation(s)
- Zhongyue Wang
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Liusi Yang
- Center for Quantum Physics and Intelligent Sciences, Department of Physics, Capital Normal University, Beijing, 100048, P. R. China
| | - Lixin Dai
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Ziyang Huang
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Keyou Wu
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Bilu Liu
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
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5
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Yang L, Yang X, Xia F, Gong Y, Li F, Yu J, Gao T, Li Y. Recent Progress on Natural Clay Minerals for Lithium-Sulfur Batteries. Chem Asian J 2023; 18:e202300473. [PMID: 37424057 DOI: 10.1002/asia.202300473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/07/2023] [Accepted: 07/07/2023] [Indexed: 07/11/2023]
Abstract
Li-S batteries with high energy density have the potential to become a viable alternative to Li-ion batteries. However, Li-S batteries still face several challenges, including the shuttle effect, low conversion kinetics, and Li dendrite growth. Natural clay minerals with porous structures, abundant Lewis-acid sites, high mechanical modulus, and versatile structural regulation show great potential for improving the performance of Li-S batteries. However, so far, relevant reviews focusing on the applications of natural clay minerals in Li-S batteries are still missing. To fill the gap, this review first presents an overview of the crystal structures of several natural clay minerals, including 1D (halloysites, attapulgites, and sepiolite), 2D (montmorillonite and vermiculite), and 3D (diatomite) structures, providing a theoretical basis for the application of natural clay minerals in Li-S batteries. Subsequently, research advancements in the natural clay-based energy materials in Li-S batteries have been comprehensively reviewed. Finally, the perspectives concerning the development of natural clay minerals and their applications in Li-S batteries are provided. We hope this review can provide timely and comprehensive information on the correlation between the structure and function of natural clay minerals in Li-S batteries and offer guidance for material selection and structure optimization of natural clay-based energy materials.
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Affiliation(s)
- Liu Yang
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Xin Yang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Feng Xia
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Yifei Gong
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Faxue Li
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Jianyong Yu
- Innovation Center for Textile Science & Technology, Donghua University, Shanghai, 201620, P. R. China
| | - Tingting Gao
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China
| | - Yiju Li
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
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6
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Li J, Zhou S, Meng X, Chen Y, Fu C, Azizi A, Zhao X, Xie W, Chang Z, Pan A. Unique ion rectifier intermediate enabled by ultrathin vermiculite sheets for high-performance Zn metal anodes. Sci Bull (Beijing) 2023:S2095-9273(23)00322-5. [PMID: 37258378 DOI: 10.1016/j.scib.2023.05.015] [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: 02/01/2023] [Revised: 03/24/2023] [Accepted: 05/02/2023] [Indexed: 06/02/2023]
Abstract
Metallic Zn represents as a primary choice in fabricating various aqueous Zn-ion batteries (ZIBs), while challenging issues include dendrite growth and parasitic reactions at the anode/electrolyte interface, considerably hamper its practical implementation in large-scale energy storage. Herein, we originally develop a low-cost multifunctional ion rectifier (IRT) as an artificial intermediate to reform Zn anode, which can practically eliminate the above issues. The hydrophobic shell (polyvinylidene difluoride) can suppress Zn interfacial corrosion with an inhibition efficiency of 94.8% by repelling water molecules from the bulk electrolyte. Additionally, negatively-charged ion channels inside the zincophilic core (ultrathin vermiculite sheets) induce de-solvating redistribution effect on Zn2+ ions flux, enabling a high ions transference number (0.79) for dendrite-free Zn deposition. This leads to exceptional Zn/Zn2+ reversibility in metallic Zn with IRT stabilization. The remarkable Coulombic efficiency (99.8%, 2000 cycles) for asymmetrical batteries, and a long-lasting lifespan (1600 h) with ultrahigh cumulative capacity of 2400 mAh cm-2 for symmetrical batteries, are successfully achieved. More encouragingly, the Zn//NH4V4O10 pouch cell retains 94.3% of its original capacity after 150 cycles at 1 A g-1. We believe that this low-cost and high-efficiency tactic could pave a promising path for anode surface modification.
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Affiliation(s)
- Jianwen Li
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
| | - Shuang Zhou
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China.
| | - Xinyu Meng
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
| | - Yining Chen
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
| | - Chunyan Fu
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
| | - Alireza Azizi
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
| | - Xiaoguang Zhao
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Weimin Xie
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Zhi Chang
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
| | - Anqiang Pan
- School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China.
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de Macêdo Neto JC, de Freitas BM, de Miranda AG, de Almeida Rodrigues R, Del Pino GG, Kieling AC, Dos Santos MD, Duvoisin Junior S, Sanches AE, Gondres Torné I, Silva CC, da Costa JCM, Bello RH. The Stability and Properties of Polystyrene/Kaolinite Nanocomposites during Synthesis via Emulsion Polymerization. Polymers (Basel) 2023; 15:polym15092094. [PMID: 37177240 PMCID: PMC10180905 DOI: 10.3390/polym15092094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/19/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
The aim of this work was to study the stability and morphological properties of polystyrene latex containing kaolinite as a filler during the process of synthesis of nanocomposites viaemulsion polymerization. Nanocomposites with 1, 3, and 5 wt% of kaolinite were prepared. Latexes with 1 to 3 wt% of kaolinite were stable during the polymerization reaction. Hydrodynamic diameters of 93.68 and 82.11 nm were found for latexes with 1 and 3 wt% of kaolinite, respectively. The quantities of 1 to 3 wt% of kaolinite added during the reaction did not influence the reaction conversion curves or the number of particles. X-ray diffraction (XRD) and unconventional techniques of scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) showed the presence of exfoliated and intercalated structures of the kaolinite.
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Affiliation(s)
- José Costa de Macêdo Neto
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Bruno Mello de Freitas
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Adalberto Gomes de Miranda
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Reinaldo de Almeida Rodrigues
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Gilberto Garcia Del Pino
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Antônio Claudio Kieling
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Marcos Dantas Dos Santos
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Sergio Duvoisin Junior
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Antônio Estanislau Sanches
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Israel Gondres Torné
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Cláudia Cândida Silva
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - João Carlos Martins da Costa
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
| | - Roger Hoel Bello
- Department of Materials Engineering, School of Engineering, Amazonas State University, Avenida Darcy Vargas, 1200, Parque Dez de Novembro, Manaus 69850-000, AM, Brazil
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de Farias ABV, da Costa TB, da Silva MGC, Vieira MGA. Cerium biosorption onto alginate/vermiculite-based particles functionalized with ionic imprinting: Kinetics, equilibrium, thermodynamic, and reuse studies. Int J Biol Macromol 2023; 241:124542. [PMID: 37086768 DOI: 10.1016/j.ijbiomac.2023.124542] [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: 12/14/2022] [Revised: 04/03/2023] [Accepted: 04/17/2023] [Indexed: 04/24/2023]
Abstract
Cerium is an essential element for several applications in industry, therefore, recovering it from secondary sources is a promising strategy from an economic and environmental perspective. For this purpose, biosorption is a low-cost and effective alternative. The present work evaluated the recovery of Ce3+ from aqueous solutions using alginate/vermiculite-based particles (ALEV) functionalized by ionic imprinting. From the kinetic assays, it was verified that the uptake of Ce3+ followed the pseudo-second-order model and was mainly controlled by external diffusion. The Langmuir model better described the equilibrium data, and a maximum biosorption capacity of 0.671 mmol/g at 45 °C was attained. The evaluation of the thermodynamic quantities revealed that the process occurs spontaneously and endothermically. The particles reuse and Ce3+ recovery were achieved using 0.1 mol/L HCl or 1.0 mol/L CaCl2 solutions for up to four cycles of biosorption/desorption. The biosorbent was characterized before and posted Ce3+ biosorption to investigate the morphology, textural properties, crystallinity, thermal resistance, composition, and functional groups of the biosorbent.
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Affiliation(s)
| | - Talles Barcelos da Costa
- University of Campinas, School of Chemical Engineering, Albert Einstein Avenue, 500, 13083-852 Campinas, Brazil
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Wang J, Zhou H, Li S, Wang L. Selective Ion Transport in Two-Dimensional Lamellar Nanochannel Membranes. Angew Chem Int Ed Engl 2023; 62:e202218321. [PMID: 36718075 DOI: 10.1002/anie.202218321] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/30/2023] [Accepted: 01/30/2023] [Indexed: 02/01/2023]
Abstract
Precise and ultrafast ion sieving is highly desirable for many applications in environment-, energy-, and resource-related fields. The development of a permselective lamellar membrane constructed from parallel stacked two-dimensional (2D) nanosheets opened a new avenue for the development of next-generation separation technology because of the unprecedented diversity of the designable interior nanochannels. In this Review, we first discuss the construction of homo- and heterolaminar nanoarchitectures from the starting materials to the emerging preparation strategies. We then explore the property-performance relationships, with a particular emphasis on the effects of physical structural features, chemical properties, and external environment stimuli on ion transport behavior under nanoconfinement. We also present existing and potential applications of 2D membranes in desalination, ion recovery, and energy conversion. Finally, we discuss the challenges and outline research directions in this promising field.
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Affiliation(s)
- Jin Wang
- Key Laboratory of Membrane Separation of Shaanxi Province,Research Institute of Membrane Separation Technology of Shaanxi Province, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710000, China
| | - Huijiao Zhou
- Key Laboratory of Membrane Separation of Shaanxi Province,Research Institute of Membrane Separation Technology of Shaanxi Province, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710000, China
| | - Shangzhen Li
- Key Laboratory of Membrane Separation of Shaanxi Province,Research Institute of Membrane Separation Technology of Shaanxi Province, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710000, China
| | - Lei Wang
- Key Laboratory of Membrane Separation of Shaanxi Province,Research Institute of Membrane Separation Technology of Shaanxi Province, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710000, China
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10
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Chen Y, Sun H, Peng T, Gao T, Ding W, Hui T, Jiang L. The Expanded Vermiculite Was Quickly Prepared by the Catalytic Action of Manganese Dioxide on Hydrogen Peroxide and Its Adsorption Properties to Cd. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020817. [PMID: 36677875 PMCID: PMC9865089 DOI: 10.3390/molecules28020817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
The structure and activity of vermiculite can be maintained by expanding vermiculite (Vrm) with hydrogen peroxide. However, it is time-consuming. In past studies, little attention has been paid to the catalytic properties of manganese dioxide on hydrogen peroxide to improve the swelling efficiency of vermiculite. In this experiment, this catalytic effect was utilized to swell Vrm in a short time. The samples were then used to adsorb Cd from the solution. Through a series of characterization tests. The results showed that the exothermic rate was 1960.42-2089.164 J/min and the total exothermic heat was 39,208.4-41,783.28 J when expanding 10 gVrm, which could have a good expansion effect. The expansion was completed in about 40 min. Compared with Vrm, the adsorption of Cd is enhanced by about 30%. It is consistent with the proposed secondary kinetic adsorption model. This study provides a new perspective and theoretical guidance for improving the efficiency of Vrm stripping by hydrogen peroxide. A kind of expanded Vrm with better Cd adsorption efficiency was also prepared.
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Affiliation(s)
- Yunzhu Chen
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Department of Resources & Environment, Xichang University, Xichang 615000, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
| | - Hongjuan Sun
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
- Correspondence:
| | - Tongjiang Peng
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
| | - Tongxi Gao
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
| | - Wenjin Ding
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
| | - Tao Hui
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
| | - Lei Jiang
- Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
- Institute of Mineral Materials and Application, Southwest University of Science and Technology, Mianyang 621010, China
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11
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Xing Y, Chen X, Huang Y, Zhen X, Wei L, Zhong X, Pan W. Facile Synthesis of Two-Dimensional Natural Vermiculite Films for High-Performance Solid-State Electrolytes. MATERIALS (BASEL, SWITZERLAND) 2023; 16:729. [PMID: 36676465 PMCID: PMC9866180 DOI: 10.3390/ma16020729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/30/2022] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
Ceramic electrolytes hold application prospects in all-solid-state lithium batteries (ASSLB). However, the ionic conductivity of ceramic electrolytes is limited by their large thickness and intrinsic resistance. To cope with this challenge, a two-dimensional (2D) vermiculite film has been successfully prepared by self-assembling expanded vermiculite nanosheets. The raw vermiculite mineral is first exfoliated to thin sheets of several atomic layers with about 1.2 nm interlayer channels by a thermal expansion and ionic exchanging treatment. Then, through vacuum filtration, the ion-exchanged expanded vermiculite (IEVMT) sheets can be assembled into thin films with a controllable thickness. Benefiting from the thin thickness and naturally lamellar framework, the as-prepared IEVMT thin film exhibits excellent ionic conductivity of 0.310 S·cm-1 at 600 °C with low excitation energy. In addition, the IEVMT thin film demonstrates good mechanical and thermal stability with a low coefficient of friction of 0.51 and a low thermal conductivity of 3.9 × 10-3 W·m-1·K-1. This reveals that reducing the thickness and utilizing the framework is effective in increasing the ionic conductivity and provides a promising stable and low-cost candidate for high-performance solid electrolytes.
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Affiliation(s)
- Yan Xing
- New Energy Technology Engineering Lab of Jiangsu Province, School of Science, Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Xiaopeng Chen
- New Energy Technology Engineering Lab of Jiangsu Province, School of Science, Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Yujia Huang
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China
| | - Xiali Zhen
- Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science and Engineering, Beihang University, Beijing 100191, China
| | - Lujun Wei
- New Energy Technology Engineering Lab of Jiangsu Province, School of Science, Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Xiqiang Zhong
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Wei Pan
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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12
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Huang X, Wu W. Research and application of graphite oxide-assisted high-gravity rotating bed liquid phase exfoliation of kaolinite. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02476-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Huang X, Wang Q, Mao R, Wang Z, Shen SGF, Mou J, Dai J. Two-dimensional nanovermiculite and polycaprolactone electrospun fibers composite scaffolds promoting diabetic wound healing. J Nanobiotechnology 2022; 20:343. [PMID: 35883146 PMCID: PMC9327406 DOI: 10.1186/s12951-022-01556-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/13/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Promoting diabetic wound healing is still a challenge, and angiogenesis is believed to be essential for diabetic wound healing. Vermiculite is a natural clay material that is very easy to obtain and exhibits excellent properties of releasing bioactive ions, buffering pH, adsorption, and heat insulation. However, there are still many unsolved difficulties in obtaining two-dimensional vermiculite and using it in the biomedical field in a suitable form. RESULTS In this study, we present a versatile organic-inorganic composite scaffold, which was constructed by embedding two-dimensional vermiculite nanosheets in polycaprolactone electrospun fibers, for enhancing angiogenesis through activation of the HIF-1α signaling pathway and promoting diabetic wound healing both in vitro and in vivo. CONCLUSIONS Together, the rational-designed polycaprolactone electrospun fibers-based composite scaffolds integrated with two-dimensional vermiculite nanosheets could significantly improve neo-vascularization, re-epithelialization, and collagen formation in the diabetic wound bed, thus promoting diabetic wound healing. This study provides a new strategy for constructing bioactive materials for highly efficient diabetic wound healing.
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Affiliation(s)
- Xingtai Huang
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology, No. 639, Zhizaoju Road, 200011, Shanghai, China
| | - Qirui Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Runyi Mao
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology, No. 639, Zhizaoju Road, 200011, Shanghai, China
| | - Zeying Wang
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology, No. 639, Zhizaoju Road, 200011, Shanghai, China
| | - Steve G F Shen
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology, No. 639, Zhizaoju Road, 200011, Shanghai, China. .,Shanghai University of Medicine and Health Sciences, Shanghai, 201318, China.
| | - Juan Mou
- The Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
| | - Jiewen Dai
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology, No. 639, Zhizaoju Road, 200011, Shanghai, China.
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14
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Huang X, Wu W. Novel preparation of attapulgite-reduced graphene oxide hydrogel composite and its application in flexible solid-state supercapacitors. NANOTECHNOLOGY 2022; 33:205704. [PMID: 35078160 DOI: 10.1088/1361-6528/ac4eb3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
After graphite oxide assisted the liquid phase shear exfoliation of attapulgite, the good dissociation and dispersion of attapulgite rod crystals are realized. Due to the spatial hindrance effect of attapulgite, which prevents the stacking of RGO sheets, the attapulgite-reduced graphene oxide three-dimensional porous hydrogel with abundant pore structure enables rapid transfer of electrolyte ions and exhibits good electrochemical performance and rate performance. The assembled flexible solid-state supercapacitor has a high operating voltage window and good flexibility and cycle stability. At a current density of 0.1 mA cm-2, it has an area specific capacitance of 127.33 mF cm-2. A series of solid-state supercapacitors can be used as the power supply for LED lights.
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Affiliation(s)
- Xiaohui Huang
- School of Environment and Chemical Engineering, Heilongjiang University of Science and Technology, People's Republic of China
- Research Center of the Ministry of Education for High Gravity of Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
| | - Wei Wu
- Research Center of the Ministry of Education for High Gravity of Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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15
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Huang H, Feng W, Chen Y. Two-dimensional biomaterials: material science, biological effect and biomedical engineering applications. Chem Soc Rev 2021; 50:11381-11485. [PMID: 34661206 DOI: 10.1039/d0cs01138j] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To date, nanotechnology has increasingly been identified as a promising and efficient means to address a number of challenges associated with public health. In the past decade, two-dimensional (2D) biomaterials, as a unique nanoplatform with planar topology, have attracted explosive interest in various fields such as biomedicine due to their unique morphology, physicochemical properties and biological effect. Motivated by the progress of graphene in biomedicine, dozens of types of ultrathin 2D biomaterials have found versatile bio-applications, including biosensing, biomedical imaging, delivery of therapeutic agents, cancer theranostics, tissue engineering, as well as others. The effective utilization of 2D biomaterials stems from the in-depth knowledge of structure-property-bioactivity-biosafety-application-performance relationships. A comprehensive summary of 2D biomaterials for biomedicine is still lacking. In this comprehensive review, we aim to concentrate on the state-of-the-art 2D biomaterials with a particular focus on their versatile biomedical applications. In particular, we discuss the design, fabrication and functionalization of 2D biomaterials used for diverse biomedical applications based on the up-to-date progress. Furthermore, the interactions between 2D biomaterials and biological systems on the spatial-temporal scale are highlighted, which will deepen the understanding of the underlying action mechanism of 2D biomaterials aiding their design with improved functionalities. Finally, taking the bench-to-bedside as a focus, we conclude this review by proposing the current crucial issues/challenges and presenting the future development directions to advance the clinical translation of these emerging 2D biomaterials.
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Affiliation(s)
- Hui Huang
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China
| | - Wei Feng
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China.
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China. .,School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, P. R. China.,Wenzhou Institute of Shanghai University, Wenzhou, 325000, P. R. China.,School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
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16
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Li M, Zhao Y, Ai Z, Bai H, Zhang T, Song S. Preparation and application of expanded and exfoliated vermiculite: A critical review. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Sethurajaperumal A, Manohar A, Banerjee A, Varrla E, Wang H, Ostrikov KK. A thermally insulating vermiculite nanosheet-epoxy nanocomposite paint as a fire-resistant wood coating. NANOSCALE ADVANCES 2021; 3:4235-4243. [PMID: 36132838 PMCID: PMC9417340 DOI: 10.1039/d1na00207d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Accepted: 06/06/2021] [Indexed: 06/01/2023]
Abstract
Conventional fire-retardant composite coatings are typically made of organic-based materials that reduce flame spread rates. However, the associated chemical reactions and starting precursors produce toxic and hazardous gases, affecting the environment and contributing to climate change. Wood is one of the most common materials used in construction and households, and thin-film fire-retardant coatings are needed to protect it from fire. Here, we derive high-performance nanocomposite paint-based coatings from naturally occurring and highly insulating layered vermiculite. The coatings are made using different weight percentages of shear-exfoliated vermiculite nanosheets in an epoxy matrix and are brush-coated onto teak wood. A series of tests using coated wooden rods and standard fire retardancy tests confirm a reduction in flame spread and combustion velocity with minimal toxic smoke release. Samples coated with the vermiculite/epoxy nanocomposite paint resist fire propagation, and post-combustion analysis indicates their resistance to thermal degradation. Our results offer a novel and eco-efficient solution to minimize the flame propagation rate, enhancing char development, and expand the scope of applications of ultra-thin vermiculite in nanocomposite coatings as a fire retardant, exploiting its low thermal conductivity in thermal insulation systems.
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Affiliation(s)
- Abimannan Sethurajaperumal
- Nanosheets and Nanocomposites Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur, Chengalpattu Tamil Nadu 603203 India
| | - Anagha Manohar
- Nanosheets and Nanocomposites Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur, Chengalpattu Tamil Nadu 603203 India
| | - Arghya Banerjee
- Nanosheets and Nanocomposites Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur, Chengalpattu Tamil Nadu 603203 India
| | - Eswaraiah Varrla
- Nanosheets and Nanocomposites Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur, Chengalpattu Tamil Nadu 603203 India
| | - Hao Wang
- Centre for Future Materials, University of Southern Queensland Toowoomba QLD 4350 Australia
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics, QUT Centre for Materials Science, Queensland University of Technology (QUT) Brisbane QLD 4000 Australia
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18
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Su Y, Wang J, Li S, Zhu J, Liu W, Zhang Z. Self-templated microwave-assisted hydrothermal synthesis of two-dimensional holey hydroxyapatite nanosheets for efficient heavy metal removal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:30076-30086. [PMID: 31418146 DOI: 10.1007/s11356-019-06160-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 07/31/2019] [Indexed: 06/10/2023]
Abstract
Heavy metals have caused serious environmental problems and threat to human health. Ultrathin and holey two-dimensional (2D) nanosheets have recently drawn significant attention as superb adsorbent material to remove heavy metal ions due to their unique physicochemical properties. Herein, we report a self-template-directed ultrafast reaction route to synthesis porous hydroxyapatite (Ca10(PO4)6(OH)2) nanosheets via a microwave-assisted hydrothermal method using poly(allylamine hydrochloride) as an additive. The resulting hydroxyapatite nanosheets showed a high specific surface area (92.9 m2 g-1) and excellent adsorption performance for various heavy metal ions including Pb(II), Cu(II), and Cd(II), with maximum adsorption capacities of 210.5, 31.6, and 24.9 mg g-1, respectively. The adsorption kinetics fitted well with the pseudo-second-order equation and the equilibrium data showed a high correlation coefficient with the Langmuir model. Based on the experimental results and analysis, we can conclude that the sorption of heavy metal ions with the hydroxyapatite nanosheets mainly attributes to surface complexation and cation exchange. The present synthetic strategy allows the fast and massive production of porous hydroxyapatite ultrathin nanosheets and may also potentially be applicable to the fabrication of other metal phosphates with assembled or hierarchical porous structures towards various applications such as water purification.
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Affiliation(s)
- Yiping Su
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
- Beijing Key Lab of New Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jing Wang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
| | - Shun Li
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
| | - Jianhua Zhu
- Anhui Province Key Laboratory of Metallurgical Emission Reduction and Resources, Metallurgical Reduction and Comprehensive Utilization of Resources of Key Laboratory of Ministry of Education, Anhui University of Technology, Maanshan, 243002, Anhui, China
| | - Weishu Liu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Zuotai Zhang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
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19
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Tian W, Li Z, Zhang K, Ge Z. Facile synthesis of exfoliated vermiculite nanosheets as a thermal stabilizer in polyvinyl chloride resin. RSC Adv 2019; 9:19675-19679. [PMID: 35519362 PMCID: PMC9065315 DOI: 10.1039/c9ra02134e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 06/18/2019] [Indexed: 12/03/2022] Open
Abstract
Well-defined vermiculite (VMT) nanosheets have been exfoliated from mineral VMT by a water-assisted anion-exchange approach. The resultant VMT nanosheets are utilized as a thermal stabilizer in polyvinyl chloride (PVC) to resist dehydrochlorination of PVC. As expected, the color-blackening onset of PVC is delayed after incorporating VMT nanosheets, and the thermal stability improves with reducing the particle size of the VMT nanosheets. The dehydrochlorination temperature appears to be increased by 13 °C for the PVC resin with 6 wt% VMT additive. The improved thermal stability is attributed to the negatively charged laminates of VMT that stabilize hydrogen chloride produced from thermal degradation of PVC. This work not only provides a cost-effective approach to prepare VMT nanosheets but also presents new insight towards the design of thermal stabilizers. Well-defined vermiculite nanosheets are exfoliated by a facile water-assisted anion-exchange approach. As its negatively charged laminates can stabilize hydrogen chloride, the VMT nanosheets show excellent thermal stability for PVC resin.![]()
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Affiliation(s)
- Weiliang Tian
- Key Laboratory of Chemical Engineering in South Xinjiang, College of Life Science, Tarim University Alar 843300 P. R. China .,State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology Beijing 100029 P. R. China
| | - Zhong Li
- Key Laboratory of Chemical Engineering in South Xinjiang, College of Life Science, Tarim University Alar 843300 P. R. China
| | - Kewei Zhang
- Key Laboratory of Chemical Engineering in South Xinjiang, College of Life Science, Tarim University Alar 843300 P. R. China .,Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University Nanning 530004 P. R. China.,State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, College of Materials Science and Engineering, Institute of Marine Biobased Materials, Qingdao University Qingdao 266071 P. R. China
| | - Zhenhong Ge
- Key Laboratory of Chemical Engineering in South Xinjiang, College of Life Science, Tarim University Alar 843300 P. R. China
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