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Bayat M, Mardani H, Roghani-Mamaqani H, Hoogenboom R. Self-indicating polymers: a pathway to intelligent materials. Chem Soc Rev 2024; 53:4045-4085. [PMID: 38449438 DOI: 10.1039/d3cs00431g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Self-indicating polymers have emerged as a promising class of smart materials that possess the unique ability to undergo detectable variations in their physical or chemical properties in response to various stimuli. This article presents an overview of the most important mechanisms through which these materials exhibit self-indication, including aggregation, phase transition, covalent and non-covalent bond cleavage, isomerization, charge transfer, and energy transfer. Aggregation is a prevalent mechanism observed in self-indicating polymers, where changes in the degree of molecular organization result in variations in optical or electrical properties. Phase transition-induced self-indication relies on the transformation between different phases, such as liquid-to-solid or crystalline-to-amorphous transitions, leading to observable changes in color or conductivity. Covalent bond cleavage-based self-indicating polymers undergo controlled degradation or fragmentation upon exposure to specific triggers, resulting in noticeable variations in their structural or mechanical properties. Isomerization is another crucial mechanism exploited in self-indicating polymers, where the reversible transformation between the different isomeric forms induces detectable changes in fluorescence or absorption spectra. Charge transfer-based self-indicating polymers rely on the modulation of electron or hole transfer within the polymer backbone, manifesting as changes in electrical conductivity or redox properties. Energy transfer is an essential mechanism utilized by certain self-indicating polymers, where energy transfer between chromophores or fluorophores leads to variations in the emission characteristics. Furthermore, this review article highlights the diverse range of applications for self-indicating polymers. These materials find particular use in sensing and monitoring applications, where their responsive nature enables them to act as sensors for specific analytes, environmental parameters, or mechanical stress. Self-indicating polymers have also been used in the development of smart materials, including stimuli-responsive coatings, drug delivery systems, food sensors, wearable devices, and molecular switches. The unique combination of tunable properties and responsiveness makes self-indicating polymers highly promising for future advancements in the fields of biotechnology, materials science, and electronics.
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Affiliation(s)
- Mobina Bayat
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
| | - Hanieh Mardani
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
| | - Hossein Roghani-Mamaqani
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
- Institute of Polymeric Materials, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281, S4-bis, B-9000 Ghent, Belgium.
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2
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Li W, Lu X, Diamond JM, Shen C, Jiang B, Sun S, Moore JS, Sottos NR. Photo-modulated activation of organic bases enabling microencapsulation and on-demand reactivity. Nat Commun 2024; 15:2771. [PMID: 38553489 PMCID: PMC10980803 DOI: 10.1038/s41467-024-47175-x] [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: 10/06/2023] [Accepted: 03/22/2024] [Indexed: 04/01/2024] Open
Abstract
A method is developed for facile encapsulation of reactive organic bases with potential application for autonomous damage detection and self-healing polymers. Highly reactive chemicals such as bases and acids are challenging to encapsulate by traditional oil-water emulsion techniques due to unfavorable physical and chemical interactions. In this work, reactivity of the bases is temporarily masked with photo-removable protecting groups, and the resulting inactive payloads are encapsulated via an in situ emulsion-templated interfacial polymerization method. The encapsulated payloads are then activated to restore the organic bases via photo irradiation, either before or after being released from the core-shell carriers. The efficacy of the photo-activated capsules is demonstrated by a damage-triggered, pH-induced color change in polymeric coatings and by recovery of adhesive strength of a damaged interface. Given the wide range of potential photo-deprotection chemistries, this encapsulation scheme provides a simple but powerful method for storage and targeted delivery of a broad variety of reactive chemicals, promoting design of diverse autonomous functionalities in polymeric materials.
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Affiliation(s)
- Wenle Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China.
| | - Xiaocun Lu
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
| | - Jacob M Diamond
- Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Chengtian Shen
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Bo Jiang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China
| | - Shi Sun
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China
| | - Jeffrey S Moore
- Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Nancy R Sottos
- Department of Materials Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
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3
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Choi S, Kim GE, Bae H, Choi SJ, Jeong JE, Kim JC, Na H, Jung H, Jung YJ, Lee SH, Park YI. A microcapsule-based reusable self-reporting system using a donor-acceptor Stenhouse adduct. RSC Adv 2024; 14:10653-10661. [PMID: 38567327 PMCID: PMC10986162 DOI: 10.1039/d4ra00925h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 03/14/2024] [Indexed: 04/04/2024] Open
Abstract
Self-reporting systems automatically indicate damaged or corroded surfaces via color changes or fluorescence. In this study, a novel reusable self-reporting system is developed by exploiting the reversibility of a donor-acceptor Stenhouse adduct (DASA). The synthesized DASA precursor exhibits a color change when damaged upon reaction with diethylamine, and returns to its colorless form upon irradiation with visible light. Microcapsules are synthesized with a core comprising styrene and the DASA precursor, along with a shell formed of urea and formaldehyde. The optimal particle size and shell thickness of the microcapsules are 225 μm and 0.17 μm, respectively. The DASA precursor-containing microcapsules are embedded in a PEG gel matrix with secondary amine groups. This coating system, initially colorless, exhibits a color change, becoming pink after being damaged by scratching due to the reaction between the DASA precursor released from ruptured microcapsules with the secondary amine groups of the PEG gel, thus demonstrating self-reporting characteristics. Furthermore, the colored surface is restored to its initial colorless state by irradiation with visible light for 1.5 hours, demonstrating the reusability of the self-reporting system.
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Affiliation(s)
- Soonyoung Choi
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Gyeong Eun Kim
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Hyoungeun Bae
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Su Jeong Choi
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Ji-Eun Jeong
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Jin Chul Kim
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Hanah Na
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Hyocheol Jung
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Yu Jin Jung
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
| | - Sang-Ho Lee
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
- Department of Chemical & Biochemical Engineering, Dongguk University Seoul 04620 Republic of Korea
| | - Young Il Park
- Center for Advanced Specialty Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
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Jiang B, Mu M, Zhou Y, Zhang J, Li W. Nanoparticle-Empowered Core-Shell Microcapsules: From Architecture Design to Fabrication and Functions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2311897. [PMID: 38456762 DOI: 10.1002/smll.202311897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/27/2024] [Indexed: 03/09/2024]
Abstract
Compartmentalization is a powerful concept to integrate multiscale components with diverse functionalities into miniature architectures. Inspired by evolution-optimized cell compartments, synthetic core-shell capsules enable storage of actives and on-demand delivery of programmed functions, driving scientific progress across various fields including adaptive materials, sustainable electronics, soft robotics, and precision medicine. To simultaneously maximize structural stability and environmental sensitivity, which are the two most critical characteristics dictating performance, diverse nanoparticles are incorporated into microcapsules with a dense shell and a liquid core. Recent studies have revealed that these nano-additives not only enhance the intrinsic properties of capsules including mechanical robustness, optical behaviors, and thermal conductivity, but also empower dynamic features such as triggered release, deformable structures, and fueled mobility. In this review, the physicochemical principles that govern nanoparticle assembly during microencapsulation are examined in detail and the architecture-controlled functionalities are outlined. Through the analysis of how each primary method implants nanoparticles into microcapsules, their distinct spatial organizations within the core-shell structures are highlighted. Following a detailed discussion of the specialized functions enabled by specific nanoparticles, the vision of the required fundamental insights and experimental studies for this class of microcarriers to fulfill its potential are sketched.
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Affiliation(s)
- Bo Jiang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Manrui Mu
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Yan Zhou
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Jun Zhang
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
| | - Wenle Li
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China
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5
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Huang X, Zhang S, Zhang P, Zhu Y, Xie J, Yang M, Han L, Hu J, Li Q, He J. Autonomous indication of electrical degradation in polymers. NATURE MATERIALS 2024; 23:237-243. [PMID: 37974006 DOI: 10.1038/s41563-023-01725-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 10/12/2023] [Indexed: 11/19/2023]
Abstract
Dielectric polymers are ubiquitous as electrical insulation in electronic devices and electrical systems. Electrical degradation of dielectric polymers tends to initiate catastrophic failure of numerous devices and systems, but its detection and early warning remain challenging. Here we report a general material strategy that signals the electrical degradation of dielectric polymers by autonomously presenting a visually discernible warning in the form of a pronounced colour change. This colour change is induced by the chromogenic response of molecular indicators blended with the polymer, which are chemically activated by the oxygen radicals generated in situ during the electrical degradation of the polymer. We unveil that the structural degradation and electrical properties of the dielectric polymer are quantitatively correlated with the colour difference. Such a chromogenic process is autonomous without the need of human intervention or other external energy, thus offering the convenience to lower or even eliminate the risk of dielectric failure.
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Affiliation(s)
- Xiaoyan Huang
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Shuai Zhang
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Pei Zhang
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Yujie Zhu
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Jiaye Xie
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Mingcong Yang
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Lu Han
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Jun Hu
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China
| | - Qi Li
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China.
| | - Jinliang He
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, China.
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Kim JH, Rosenfeld J, Kim YC, Choe S, Composto RJ, Lee D, Dreyfus R. Polymer-Grafted, Gold Nanoparticle-Based Nano-Capsules as Reversible Colorimetric Tensile Strain Sensors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2300361. [PMID: 37140078 DOI: 10.1002/smll.202300361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/29/2023] [Indexed: 05/05/2023]
Abstract
Colloidal colorimetric microsensors enable the in-situ detection of mechanical strains within materials. Enhancing the sensitivity of these sensors to small scale deformation while enabling reversibility of the sensing capability would expand their utility in applications including biosensing and chemical sensing. In this study, we introduce the synthesis of colloidal colorimetric nano-sensors using a simple and readily scalable fabrication method. Colloidal nano sensors are prepared by emulsion-templated assembly of polymer-grafted gold nanoparticles (AuNP). To direct the adsorption of AuNP to the oil-water interface of emulsion droplets, AuNP (≈11nm) are functionalized with thiol-terminated polystyrene (PS, Mn = 11k). These PS-grafted gold nanoparticles are suspended in toluene and subsequently emulsified to form droplets with a diameter of ≈30µm. By evaporating the solvent of the oil-inwater emulsion, we form nanocapsules (AuNC) (diameter < 1µm) decorated by PS-grafted AuNP. To test mechanical sensing, the AuNC are embedded in an elastomer matrix. The addition of a plasticizer reduces the glass transition temperature of the PS brushes, and in turn imparts reversible deformability to the AuNC. The plasmonic peak of the AuNC shifts towards lower wavelengths upon application of uniaxial tensile tension, indicating increased inter-nanoparticle distance, and reverts back as the tension is released.
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Affiliation(s)
- Jae-Hyun Kim
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
| | - Joseph Rosenfeld
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
| | - Ye Chan Kim
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
| | - Sean Choe
- Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, CRTB, Bristol, PA, 19007, USA
| | - Russell J Composto
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
| | - Daeyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, 19104, USA
| | - Rémi Dreyfus
- Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, CRTB, Bristol, PA, 19007, USA
- Laboratoire Nanotechnologies Nanosystemes (LN2), CNRS - Université de Sherbrooke, Quebec, J1K 0A5, Canada
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7
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Streltsov DR, Borisov KM, Kalinina AA, Muzafarov AM. Quantitative Elasticity Mapping of Submicron Silica Hollow Particles by PeakForce QNM AFM Mode. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1916. [PMID: 37446432 DOI: 10.3390/nano13131916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/16/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
Silica hollow spheres with a diameter of 100-300 nm and a shell thickness of 8±2 nm were synthesized using a self-templating amphiphilic polymeric precursor, i.e., poly(ethylene glycol)-substituted hyperbranched polyethoxysiloxane. Their elastic properties were addressed with a high-frequency AFM indentation method based on the PeakForce QNM (quantitative nanomechanical mapping) mode enabling simultaneous visualization of the surface morphology and high-resolution mapping of the mechanical properties. The factors affecting the accuracy of the mechanical measurements such as a local slope of the particle surface, deformation of the silica hollow particles by a solid substrate, shell thickness variation, and applied force range were analysed. The Young's modulus of the shell material was evaluated as E=26±7 GPa independent of the applied force in the elastic regime of deformations. Beyond the elastic regime, the buckling instability was observed revealing a non-linear force-deformation response with a hysteresis between the loading and unloading force-distance curves and irreversible deformation of the shell at high applied forces. Thus, it was demonstrated that PeakForce QNM mode can be used for quantitative measurements of the elastic properties of submicon-sized silica hollow particles with nano-size shell thickness, as well as for estimation of the buckling behaviour beyond the elastic regime of shell deformations.
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Affiliation(s)
- Dmitry R Streltsov
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 117393 Moscow, Russia
| | - Kirill M Borisov
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 117393 Moscow, Russia
| | - Aleksandra A Kalinina
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 117393 Moscow, Russia
| | - Aziz M Muzafarov
- Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences, 117393 Moscow, Russia
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119334 Moscow, Russia
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8
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Liu D, Li L, Yin G, Chen T. A dinoflagellate-inspired mechanochromic film for fast and reversible information encryption and display. Chem Commun (Camb) 2022; 58:13791-13794. [PMID: 36441635 DOI: 10.1039/d2cc05697f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Inspired by dinoflagellates, we developed a flexible film consisting of spiropyran-based soft polyacrylate and Zn(OTf)2. The open-ring form of spiropyran coordinated with Zn(OTf)2 under stretching to produce a visible fluorescent color change from colorless to yellow. The potential of this film was demonstrated for fast and reversible information encryption and decryption.
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Affiliation(s)
- Depeng Liu
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. .,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Longqiang Li
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. .,College of Material Sciences and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangqiang Yin
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. .,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Chen
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. .,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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Liu C, Hou P, Qian B, Hu X. Smart healable and reportable anticorrosion coating based on halloysite nanotubes carrying 8-hydroxyquinoline on steel. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.10.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Li J, Tao Z, Cui J, Shen S, Qiu H. Facile Fabrication of Dual Functional Graphene Oxide Microcapsules Carrying Corrosion Inhibitor and Encapsulating Self-Healing Agent. Polymers (Basel) 2022; 14:polym14194067. [PMID: 36236015 PMCID: PMC9570508 DOI: 10.3390/polym14194067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/23/2022] [Accepted: 09/24/2022] [Indexed: 11/16/2022] Open
Abstract
Dual functional graphene oxide (GO) microcapsules were fabricated through self-assembly in Pickering emulsions, carrying corrosion inhibitor benzotriazole (BTA) on the microcapsule shells and encapsulating a self-healing agent epoxy monomer. The formation of the GO microcapsules was assisted by the interaction between BTA and GO, which provided robust encapsulation for the epoxy monomer. The loading capacity of BTA and epoxy monomer reached 90.5%. The addition of the GO microcapsules simultaneously promoted the corrosion protection and self-healing properties of the waterborne epoxy composite coatings. The healing efficiency of the composite coatings reached over 99.7% when the content of the microcapsules was 10 wt%. Meanwhile, the corrosion current density of the intact coatings was decreased for around 50 times.
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Affiliation(s)
- Jing Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
- Correspondence: (J.L.); (H.Q.)
| | - Zhenglin Tao
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Jincan Cui
- School of Mechanical Engineering, Nantong University, No. 9 Seyuan Road, Nantong 226019, China
| | - Shuling Shen
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Hanxun Qiu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
- Correspondence: (J.L.); (H.Q.)
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Jia L, Xiao J, Cui J, Hao J, Wang X. Self-reporting of damage in underwater hierarchical ionic skins via cascade reaction-regulated chemiluminescence. MATERIALS HORIZONS 2022; 9:2128-2137. [PMID: 35723220 DOI: 10.1039/d2mh00410k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Self-reporting of damage in underwater materials allows on-demand maintenance and, therefore, improves the reliability of materials used in aquatic environments. Here, we report a chemiluminescence-based strategy to self-report the mechanical damage (e.g., fracture or puncture) in underwater hierarchical ionic skins (HI-skins). The chemiluminescence-based self-reporting is regulated by a cascade reaction, which first occurs at the interface between water and the damage location and then spreads through the whole material. When the HI-skins were mechanically damaged underwater, the pre-embedded calcium peroxide became exposed to and reacted with water to generate hydrogen peroxide that further activated the peroxyoxalate chemiluminescence reaction for reporting the damage. The luminescence wavelength could be tuned (439, 508, or 603 nm) and the damage-induced luminescence lasted for up to 12 h. The self-reporting HI-skins also displayed high mechanical and electronic restorability (93% healing efficiency), excellent stretchability (1600%), impressive room-temperature ionic conductivity (1.7 × 10-4 S cm-1), and durable strain sensing performance (highly reproducible electrical response over 1000 uninterrupted strain cycles), making them suitable and reliable candidates for underwater soft ionotronics.
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Affiliation(s)
- Liangying Jia
- National Engineering Research Center for Colloidal Materials & Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, P. R. China.
| | - Jing Xiao
- National Engineering Research Center for Colloidal Materials & Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, P. R. China.
| | - Jiwei Cui
- National Engineering Research Center for Colloidal Materials & Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, P. R. China.
| | - Jingcheng Hao
- National Engineering Research Center for Colloidal Materials & Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, P. R. China.
| | - Xu Wang
- National Engineering Research Center for Colloidal Materials & Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, P. R. China.
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12
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Cao L, Wang Q, Wang W, Li Q, Chen S. Synthesis of Smart Nanofiber Coatings with Autonomous Self-Warning and Self-Healing Functions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:27168-27176. [PMID: 35666307 DOI: 10.1021/acsami.2c05048] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Organic protective coatings are widely used to protect metal structures from corrosion but they are vulnerable to undetectable damage. Without timely detection and repair, it could lead to severe consequences. How to warn and heal damaged areas simultaneously and automatically has become a challenging problem. Herein, we report an intelligent protective coating with self-warning and self-healing functions. This strategy was achieved by embedding bifunctional nanofibers containing 1,10-phenanthroline (Phen) in organic coatings. The nanofibers with Phen as a core and a poly(vinyl alcohol) (PVA)─chitosan (CS) blend solution as a shell were synthesized by coaxial electrospinning. The PVA/CS@Phen nanofiber-embedded coating displayed self-healing and high contrast indication function of the damaged area on coatings. Prominent red could warn microdamage and macrosurface damage, which occurred rapidly and healed permanently. The intelligent coating exhibited high healing performance under artificial injury with self-warning characteristics, and the cure rate was about 98.4% without external intervention. In the healing process, free amino groups of CS in the shell of nanofibers enhanced the sustained release of Phen. This convenient, economical, and efficient strategy with cooperative functions of self-warning and self-healing delivers an effective solution for prolonging the service life of protective coatings. This multifunctional coating exhibits excellent potential in the field of marine engineering applications.
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Affiliation(s)
- Lin Cao
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Qi Wang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Wei Wang
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Qiyuan Li
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Shougang Chen
- School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
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13
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Affiliation(s)
- Qianhui Liu
- Department of Materials Science and Engineering, Center for Optical Materials Science and Technologies (COMSET), Clemson University, Clemson, SC, USA
| | - Marek W. Urban
- Department of Materials Science and Engineering, Center for Optical Materials Science and Technologies (COMSET), Clemson University, Clemson, SC, USA
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Han T, Chen S, Wang X, Fu X, Wen H, Wang Z, Wang D, Qin A, Yang J, Tang BZ. Autonomous Visualization of Damage in Polymers by Metal-Free Polymerizations of Microencapsulated Activated Alkynes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105395. [PMID: 35068078 PMCID: PMC8922127 DOI: 10.1002/advs.202105395] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/06/2022] [Indexed: 06/02/2023]
Abstract
The development of autonomous materials with desired performance and built-in visualizable sensing units is of great academic and industrial significance. Although a wide range of damage indication methods have been reported, the "turn-on" sensing mechanism by damaging events based on microcapsule systems, especially those relying on chemical reactions to elicit a chromogenic response, are still very limited. Herein, a facile and metal-free polymerization route with an interesting reaction-induced coloration effect is demonstrated. Under the catalysis of 1,4-diazabicyclo[2.2.2]octane (DABCO), the polymerizations of difunctional or trifunctional activated alkynes proceed very quickly at 0 °C in air. A series of polymers composed of stereoregular enyne structure (major unit) and divinyl ether structure (minor unit) are obtained. Both the catalyst and monomers are colorless while the polymerized products are deep-colored. This process can be applied for the damage visualization of polymers using the microencapsulation technique. Microcapsules containing the reactive alkyne monomer are prepared and mixed in a DABCO-dispersed polymer film. Both the external and internal damage regions of this composite film can be readily visualized once the reaction is initiated from the ruptured microcapsules. Moreover, the newly formed polymer automatically seals the cracks with an additional protection function.
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Affiliation(s)
- Ting Han
- Center for AIE ResearchShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen518060China
| | - Shusheng Chen
- Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong999077China
| | - Xinnan Wang
- Department of ChemistryHong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong999077China
| | - Xinyao Fu
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSCUT‐HKUST Joint Research InstituteAIE InstituteCenter for Aggregation‐Induced EmissionSouth China University of TechnologyGuangzhou510640China
| | - Haifei Wen
- Center for AIE ResearchShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen518060China
| | - Zaiyu Wang
- Department of ChemistryHong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong999077China
| | - Dong Wang
- Center for AIE ResearchShenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen518060China
| | - Anjun Qin
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSCUT‐HKUST Joint Research InstituteAIE InstituteCenter for Aggregation‐Induced EmissionSouth China University of TechnologyGuangzhou510640China
| | - Jinglei Yang
- Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong999077China
| | - Ben Zhong Tang
- Department of ChemistryHong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong999077China
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSCUT‐HKUST Joint Research InstituteAIE InstituteCenter for Aggregation‐Induced EmissionSouth China University of TechnologyGuangzhou510640China
- Shenzhen Institute of Aggregate Science and TechnologySchool of Science and EngineeringThe Chinese University of Hong KongShenzhen, 2001 Longxiang Boulevard, Longgang District, Shenzhen CityGuangdong518172China
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15
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Zhang H, Wang Q, Li Y, Mao J, Zheng X. Preparation and characterization of damage indication and self‐healing microcapsules for surface micro‐cracks in mortar coating. J Appl Polym Sci 2022. [DOI: 10.1002/app.52198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Haohui Zhang
- Institute of Nano Engineering, College of Civil Engineering and Architecture Shandong University of Science and Technology Shandong China
| | - Qing Wang
- Institute of Nano Engineering, College of Civil Engineering and Architecture Shandong University of Science and Technology Shandong China
- College of Mechanical and Architectural Engineering Taishan University Shandong China
| | - Yao Li
- Institute of Nano Engineering, College of Civil Engineering and Architecture Shandong University of Science and Technology Shandong China
| | - Junheng Mao
- Institute of Nano Engineering, College of Civil Engineering and Architecture Shandong University of Science and Technology Shandong China
| | - Xu Zheng
- Institute of Nano Engineering, College of Civil Engineering and Architecture Shandong University of Science and Technology Shandong China
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16
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Trivalent Cations Detection of Magnetic-Sensitive Microcapsules by Controlled-Release Fluorescence Off-On Sensor. NANOMATERIALS 2021; 11:nano11071801. [PMID: 34361186 PMCID: PMC8308368 DOI: 10.3390/nano11071801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 11/23/2022]
Abstract
A pyrene-based derivative, 2-((pyrene-1-ylmethylene)amino)ethanol (PE) nanoparticle, was encapsulated via water-in-oil-in-water (W/O/W) double emulsion with the solvent evaporation method by one-pot reaction and utilized as a fluorescence turn-on sensor for detecting Fe3+, Cr3+, and Al3+ ions. Magnetic nanoparticles (MNPs) embedded in polycaprolactone (PCL) were used as the magnetic-sensitive polyelectrolyte microcapsule-triggered elements in the construction of the polymer matrix. The microcapsules were characterized by ultraviolet–visible (UV–Vis) and photoluminescence (PL) titrations, quantum yield (Φf) calculations, 1H nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), and superconducting quantum interference device magnetometry (SQUID) studies. This novel responsive release of the microcapsule fluorescence of the turn-on sensor for detecting trivalent cations was due to the compound PE and the MNPs being incorporated well within the whole system, and an effective thermal and kinetic energy transfer between the core and shell structure efficiently occurred in the externally oscillating magnetic field. The magnetic-sensitive fluorescence turn-on microcapsules show potential for effective metal ion sensing in environmental monitoring and even biomedical applications. Under the optimal controlled-release probe fluorescence conditions with high-frequency magnetic field treatment, the limit of detection (LOD) reached 1.574–2.860 μM and recoveries ranged from 94.7–99.4% for those metals in tap water.
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17
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Son DH, Kim GY, Jeong JE, Lee SH, Park YI, Kong H, Cheong IW, Kim JC. Influence of Material Properties on the Damage-Reporting and Self-Healing Performance of a Mechanically Active Dynamic Network Polymer in Coating Applications. Molecules 2021; 26:2468. [PMID: 33922672 PMCID: PMC8122913 DOI: 10.3390/molecules26092468] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/17/2021] [Accepted: 04/20/2021] [Indexed: 11/17/2022] Open
Abstract
We conducted a detailed investigation of the influence of the material properties of dynamic polymer network coatings on their self-healing and damage-reporting performance. A series of reversible polyacrylate urethane networks containing the damage-reporting diarylbibenzofuranone unit were synthesized, and their material properties (e.g., indentation modulus, hardness modulus, and glass-transition temperature) were measured conducting nanoindentation and differential scanning calorimetry experiments. The damage-reporting and self-healing performances of the dynamic polymer network coatings exhibited opposite tendencies with respect to the material properties of the polymer network coatings. Soft polymer network coatings with low glass-transition temperature (~10 °C) and indentation hardness (20 MPa) exhibited better self-healing performance (almost 100%) but two times worse damage-reporting properties than hard polymer network coatings with high glass-transition temperature (35~50 °C) and indentation hardness (150~200 MPa). These features of the dynamic polymer network coatings are unique; they are not observed in elastomers, films, and hydrogels, whereby the polymer networks are bound to the substrate surface. Evidence indicates that controlling the polymer's physical properties is a key factor in designing high-performance self-healing and damage-reporting polymer coatings based on mechanophores.
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Affiliation(s)
- Da Hae Son
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
| | - Gi Young Kim
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
| | - Ji-Eun Jeong
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
| | - Sang-Ho Lee
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
| | - Young Il Park
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
| | - Hoyoul Kong
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
| | - In Woo Cheong
- School of Applied Chemistry, Kyungpook National University, Daegu 41566, Korea
| | - Jin Chul Kim
- Center for Advanced Specialty Chemicals, Division of Specialty and Bio-based Chemicals Technology, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44412, Korea; (D.H.S.); (G.Y.K.); (J.-E.J.); (S.-H.L.); (Y.I.P.); (H.K.)
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18
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Chen Y, Li W, Luo J, Liu R, Sun G, Liu X. Robust Damage-Reporting Strategy Enabled by Dual-Compartment Microcapsules. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14518-14529. [PMID: 33739100 DOI: 10.1021/acsami.0c20276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Dye-filled microcapsules are an attractive way to identify microscopic damage of materials by the naked eye. However, there are many disadvantages in traditional microcapsule-based self-reporting materials, such as a poor self-reporting effect. A new concept for the design of self-reporting microcapsules is presented here. Our work develops a novel kind of dual-compartmental microcapsule via Pickering emulsion photopolymerization, which can encapsulate two interacting species ("pro-dye" and "developer") separately in a single microcapsule. In our strategy, SiO2 microspheres encapsulating polyetheramine (PEA, developer) were first prepared and employed as a Pickering emulsifier to stabilize oil-in-water emulsions, in which the oil phase consisted of 2',7'-dichlorofluorescein (DCF, pro-dye) and a monomer. After the monomer polymerization, a dual-compartment microcapsule, which encapsulated the pro-dye in the core and the developer in the shell, was obtained. Upon the rupture of the microcapsule, the pro-dye and the developer were released simultaneously and reacted to yield a pronounced chromogenic response. Compared with traditional double-microcapsule systems, this dual-compartment microcapsule system demonstrated a more efficient and pronounced self-reporting effect. This is the first time that a double-encapsulation scheme involving the compartmentalized release of two interacting species within a single microcapsule has been demonstrated for self-reporting, which overcomes the tough problems of the uneven distribution of the traditional double-microcapsule systems.
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Affiliation(s)
- Yaxin Chen
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Wei Li
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Jing Luo
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Ren Liu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Guanqing Sun
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Xiaoya Liu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
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19
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Versatility of the microencapsulation technique via integrating microfluidic T-Junction and interfacial polymerization in encapsulating different polyamines. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125097] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Deneke N, Rencheck ML, Davis CS. An engineer's introduction to mechanophores. SOFT MATTER 2020; 16:6230-6252. [PMID: 32567642 DOI: 10.1039/d0sm00465k] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Mechanophores (MPs) are a class of stimuli-responsive materials that are of increasing interest to engineers due to their potential applications as stress sensors. These mechanically responsive molecules change color or become fluorescent upon application of a mechanical stimulus as they undergo a chemical reaction when a load is applied. By incorporating MPs such as spirolactam, spiropyran, or dianthracene into a material system, the real-time stress distribution of the matrix can be directly observed through a visual response, ideal for damage and failure sensing applications. A wide array of applications that require continuous structural health monitoring could benefit from MPs including flexible electronics, protective coatings, and polymer matrix composites. However, there are significant technical challenges preventing MP implementation in industry. Effective strategies to quantitatively calibrate the photo response of the MP with applied stress magnitudes must be developed. Additionally, environmental conditions, including temperature, humidity, and ultraviolet light exposure can potentially impact the performance of MPs. By addressing these limitations, engineers can work to move MPs from the synthetic chemistry bench to the field. This review aims to highlight recent progress in MP research, discuss barriers to implementation, and provide an outlook on the future of MPs, specifically focused on polymeric material systems. Although the focus is on engineering MPs for bulk materials, a brief overview of mechanochemistry will be discussed followed by methods for activation and quantification of MP photo response (concentrating specifically on fluorescently active species). Finally, current challenges and future directions in MP research will be addressed.
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Affiliation(s)
- Naomi Deneke
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, USA.
| | - Mitchell L Rencheck
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, USA.
| | - Chelsea S Davis
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47906, USA.
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21
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Chen X, Zhong Q, Cui C, Ma L, Liu S, Zhang Q, Wu Y, An L, Cheng Y, Ye S, Chen X, Dong Z, Chen Q, Zhang Y. Extremely Tough, Puncture-Resistant, Transparent, and Photoluminescent Polyurethane Elastomers for Crack Self-Diagnose and Healing Tracking. ACS APPLIED MATERIALS & INTERFACES 2020; 12:30847-30855. [PMID: 32597173 DOI: 10.1021/acsami.0c07727] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ensuring material performance reliability and lifetime is crucial for practical operations. Small cracks on the material surface are often detrimental to its safe operation. This study describes the development of a hydrogen bond-rich puncture-resistant polyurethane elastomer with supertoughness. The as-prepared polyurethane transparent films feature high tensile break strength (57.4 MPa) and great toughness (228 MJ m-3). Additionally, a facile, low-cost, crack self-diagnostic approach through photoluminescence using a small luminous pen is reported. The materials efficiently achieved self-healing at 90 °C after the crack formation. The change of fluorescence intensity on the crack can be used to track the self-healing process. Therefore, this work provides a guideline for the material design of supertough, puncture-resistant, transparent, and healable elastomers and a crack self-diagnosis and healing approach.
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Affiliation(s)
- Xingxing Chen
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Qianyun Zhong
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Chenhui Cui
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Li Ma
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shuang Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Qiang Zhang
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Youshen Wu
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Le An
- State Key Lab for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yilong Cheng
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shibo Ye
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Xiaoming Chen
- Micro- and Nanotechnology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Zhen Dong
- Inose Corporation, Beijing 100089, China
| | - Quan Chen
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yanfeng Zhang
- Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Lab for Strength and Vibration of Mechanical Structures; Xi'an Jiaotong University & Shaanxi Quantong Joint Research Institute of New Energy Vehicles Power, Xi'an Jiaotong University, Xi'an 710049, China
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22
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Calvino C, Henriet E, Muff LF, Schrettl S, Weder C. Mechanochromic Polymers Based on Microencapsulated Solvatochromic Dyes. Macromol Rapid Commun 2020; 41:e1900654. [PMID: 32134544 DOI: 10.1002/marc.201900654] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 02/07/2020] [Indexed: 12/19/2022]
Abstract
The development of polymers with built-in sensors that provide readily perceptible optical warning signs of mechanical events has received considerable interest. A simple and versatile concept to bestow polymers with mechanochromic behavior is the incorporation of dye-filled microcapsules. Such capsules release their cargo when their shell is damaged, and the dye is subsequently activated through a chemical or physical change that causes a chromogenic response. Here, we report the preparation of fluorescent poly(urea-formaldehyde) microcapsules containing solutions of a solvatochromic cyanostilbene dye and their integration in different polymers. When objects made from such composites are damaged, the dye solution is released from the containers, diffuses into the matrix, and the solvent evaporates. As a result, the polarity around the dye molecules changes, and this leads to a change of the fluorescence color. Alternatively, the dye is blended into the polymer matrix, microcapsules are loaded with a solvent, and the release of the latter triggers the color change. Both mechanisms afford ratiometric signals because the capsules that remain intact or dye molecules that are not exposed to the solvent can be used as a built-in reference; therefore, a quantitative assessment of the damage inflicted on the material is a priori possible.
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Affiliation(s)
- Céline Calvino
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland.,Pritzker School of Molecular Engineering, University of Chicago, 5640 S. Ellis Ave., Chicago, IL, 60637, USA
| | - Emma Henriet
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland.,Université de Technologie Belfort-Montbéliard, Rue de Leupe, Sevenans, 90400, France
| | - Livius F Muff
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Stephen Schrettl
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, CH-1700, Switzerland
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23
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Liu C, Jin Z, Cheng L, Zhao H, Wang L. Synthesis of nanosensors for autonomous warning of damage and self-repairing in polymeric coatings. NANOSCALE 2020; 12:3194-3204. [PMID: 31967166 DOI: 10.1039/c9nr09221h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Polymeric materials are susceptible to minor damage, which is undetectable. Without timely and effective repair treatment, the damage may deteriorate the integrity of the materials and ultimately result in material failure and catastrophe. Autonomous warning and simultaneous damage repair are of great practical significance yet difficult to realize. Herein, we introduce a smart coating with autonomous warning and repairing of damage by the simple incorporation of nanosensors embedded with phenanthroline as a corrosion indicator and inhibitor. The electrochemical corrosion resulting from coating damage can be rapidly indicated by a prominent orange-red color in just five minutes. In addition to the warning function, the smart coating exhibits efficient self-repairing in the defective region, as reflected from the disappearance of the electrochemical admittance peak. This simple and powerful strategy dependent on a single active component to achieve an autonomous warning and repairing effect is highly expected to provide a new avenue for enhancing the security and longevity of other polymeric materials.
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Affiliation(s)
- Chengbao Liu
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhengyu Jin
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
| | - Li Cheng
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
| | - Haichao Zhao
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
| | - Liping Wang
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
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24
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Chen S, Han T, Zhao Y, Luo W, Zhang Z, Su H, Tang BZ, Yang J. A Facile Strategy To Prepare Smart Coatings with Autonomous Self-Healing and Self-Reporting Functions. ACS APPLIED MATERIALS & INTERFACES 2020; 12:4870-4877. [PMID: 31887015 DOI: 10.1021/acsami.9b18919] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Herein, we report a smart coating with autonomous self-healing and self-reporting functions by simple integration of one-component microcapsules into the matrix without external intervention. The microcapsules containing hexamethylene diisocyanate (HDI) solution of aggregation-induced emission luminogens (AIEgens) were synthesized, and their properties, such as their composition, thermal stability, morphology, and damage-indicating ability, were investigated systematically. The AIEgen/HDI microcapsule-embedded coatings display adaptive self-repair of scratches and simultaneous high-contrast indication of the healed damage. Two commercialized AIEgens, tetraphenylethylene (TPE) and its derivative with dimethoxyl and benzylidene-methyloxazolone moieties (DM-TPE-BMO), were utilized as examples to demonstrate the feasibility of this concept in diverse polymer matrixes (including blue autofluorescent matrixes). It was found that the content of AIEgens can even be lowered to 0.05 wt %. This facile, economical, and feasible strategy toward the dual functions of self-repairing and self-sensing provides a new route for enhancing the longevity and reliability of polymer coatings, which is appealing and of great importance in practical applications.
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Affiliation(s)
| | - Ting Han
- Center for AIE Research, College of Materials Science and Engineering , Shenzhen University , Shenzhen 518060 , China
| | | | | | - Zhong Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication and CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , China
| | | | - Ben Zhong Tang
- Center for AIE Research, College of Materials Science and Engineering , Shenzhen University , Shenzhen 518060 , China
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25
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Li Y, Wang Q, Zheng X, Li Y, Luan J. Microcapsule encapsulated with leuco dye as a visual sensor for concrete damage indicationviacolor variation. RSC Adv 2020; 10:1226-1231. [PMID: 35494703 PMCID: PMC9047305 DOI: 10.1039/c9ra09492j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 12/23/2019] [Indexed: 12/19/2022] Open
Abstract
A microcapsule-type visualization sensor for concrete structural damage indication is proposed in this article. Crystal violet lactone, as damage indicator, was microencapsulated within poly(methyl methacrylate) to synthesize the sensor. The successful encapsulation was confirmed by Fourier transform infrared spectrometry. Microcapsules of different diameters and size distributions were obtained by varied stirring speeds. The fabricated microcapsules were embedded into a polymer coating to accomplish the damage indication. When cracks propagated in the coating, the crystal violet lactone in leuco form was released from the ruptured microcapsules. Due to reacting with silicon dioxide in concrete, the released crystal violet lactone turned blue and highlighted the damaged area. It was verified that the visualization performance of the sensor showed good durability in both dry and wet conditions. The proposed microcapsule-type visualization sensor has advantages of easy fabrication, high indication stability, and no special equipment requirements, which will reduce the complexity of concrete structural health monitoring significantly. A visual microcapsule sensor for concrete damage detection by color variation without the requirement for additional activators.![]()
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Affiliation(s)
- Yao Li
- Institute of NanoEngineering
- College of Civil Engineering and Architecture
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Qing Wang
- Institute of NanoEngineering
- College of Civil Engineering and Architecture
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Xu Zheng
- Institute of NanoEngineering
- College of Civil Engineering and Architecture
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Yunfeng Li
- Institute of NanoEngineering
- College of Civil Engineering and Architecture
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Jinjin Luan
- Institute of NanoEngineering
- College of Civil Engineering and Architecture
- Shandong University of Science and Technology
- Qingdao 266590
- China
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26
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Deng R, Wang Y, Yang L, Bain CD. In Situ Fabrication of Polymeric Microcapsules by Ink-Jet Printing of Emulsions. ACS APPLIED MATERIALS & INTERFACES 2019; 11:40652-40661. [PMID: 31581770 DOI: 10.1021/acsami.9b14417] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phase separation driven by solvent evaporation of emulsions can be used to create polymeric microcapsules. The combination of emulsion solvent evaporation with ink-jet printing allows the rapid fabrication of polymeric microcapsules at a target location on a surface. The ink is an oil-in-water emulsion containing in the dispersed phase a shell-forming polymer, a core-forming fluid that is a poor solvent for the polymer, and a low-boiling good solvent. After the emulsion is printed onto the substrate, the good solvent evaporates by diffusion through the aqueous phase, and the polymer and the poor solvent phase separate to form microcapsules. The continuous aqueous phase contains polyvinyl alcohol that serves as an emulsifier and a binder of the capsules to the substrate. This method is demonstrated for microcapsules with various shell-forming polymers (polystyrene, poly(methylmethacrylate) and poly(l-lactide)) and core-forming poor solvents (hexadecane and a 4-heptanone/sunflower oil mixture). Cargoes such as fluorescent dyes (Nile Red and tetracyanoquinodimethane) or active ingredients (e.g., the fungicide tebuconazole) can be encapsulated. Uniform microcapsules are obtained by printing emulsions containing monodisperse oil droplets produced in a microfluidic device. We discuss the physical parameters that need to be controlled for the successful fabrication of microcapsules in inkjet printing. The method for rapid, in situ encapsulation could be useful for controlled-release applications such as in agrochemical sprays, fragrances, functional coatings, and topical medicines.
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Affiliation(s)
- Renhua Deng
- Department of Chemistry , Durham University , Stockton Road , Durham DH1 3LE , U.K
| | - Yilin Wang
- Department of Chemistry , Durham University , Stockton Road , Durham DH1 3LE , U.K
| | - Lisong Yang
- Department of Chemistry , Durham University , Stockton Road , Durham DH1 3LE , U.K
| | - Colin D Bain
- Department of Chemistry , Durham University , Stockton Road , Durham DH1 3LE , U.K
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27
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Jia Y, Wang S, Wang WJ, Li BG, Zhu S. Design and Synthesis of a Well-Controlled Mechanoluminescent Polymer System Based on Fluorescence Resonance Energy Transfer with Spiropyran as a Force-Activated Acceptor and Nitrobenzoxadiazole as a Fluorescent Donor. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01556] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yanyu Jia
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Song Wang
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wen-Jun Wang
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
- Institute of Zhejiang University—Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Bo-Geng Li
- State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shiping Zhu
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 47L, Canada
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
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28
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Dual Monitoring of Cracking and Healing in Self-healing Coatings Using Microcapsules Loaded with Two Fluorescent Dyes. Molecules 2019; 24:molecules24091679. [PMID: 31052146 PMCID: PMC6539550 DOI: 10.3390/molecules24091679] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/21/2019] [Accepted: 04/29/2019] [Indexed: 11/17/2022] Open
Abstract
We report the development of an extrinsic, self-healing coating system that shows no fluorescence from intact coating, yellowish fluorescence in cracked regions, and greenish fluorescence in healed regions, thus allowing separate monitoring of cracking and healing of coatings. This fluorescence-monitoring self-healing system consisted of a top coating and an epoxy matrix resin containing mixed dye loaded in a single microcapsule. The dye-loaded microcapsules consisted of a poly(urea-formaldehyde) shell encapsulating a healing agent containing methacryloxypropyl-terminated polydimethylsiloxane (MAT-PDMS), styrene, a photo-initiator, and a mixture of two dyes: one that fluoresced only in the solid state (DCM) and a second that fluoresced dramatically in the solid than in the solution state (4-TPAE). A mixture of the healing agent, photo-initiator, and the two dyes was yellow due to fluorescence from DCM. On UV curing of this mixture, however, the color changed from yellow to green, and the fluorescence intensity increased due to fluorescence from 4-TPAE in the solid state. When a self-healing coating embedded with microcapsules containing the DCM/4-TPAE dye mixture was scratched, the damaged region exhibited a yellowish color that changed to green after healing. Thus, the self-healing system reported here allows separate monitoring of cracking and healing based on changes in fluorescence color.
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29
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30
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Shokrian MD, Shelesh-Nezhad K, Najjar R. Toughening effect of nanocomposite-wall microcapsules on the fracture behavior of epoxy. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.02.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Tian R, Li K, Shi W, Ding C, Lu C. In situ visualization of hydrophilic spatial heterogeneity inside microfluidic chips by fluorescence microscopy. LAB ON A CHIP 2019; 19:934-940. [PMID: 30810141 DOI: 10.1039/c8lc01336e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fluorescence visualization for hydrophilic spatial heterogeneity inside microfluidic chips is a long-standing challenge owing to the lack of fluorescent dyes with high contrast between the target and the background noise. Herein, we used boronic acid in aggregation-induced emission (AIE) molecules as an anchor group towards modified hydroxyl groups, and an in situ visualization approach for hydrophilic spatial heterogeneity inside microfluidic chips was demonstrated. This success is based on the high-contrast of fluorescent behaviors for AIE molecules in aqueous solution and their immobilization by hydroxyl groups inside the microfluidic channels. In comparison to conventional laboratory-based ex situ techniques, the proposed strategy provides a direct representation for hydrophilic spatial heterogeneity, including the quantity and distribution of hydroxyl groups. This discovery not only identifies a previously unknown variability in hydrophilic spatial heterogeneity inside microfluidic channels, but also guides an optimal hydrophilic modification method in the channels.
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Affiliation(s)
- Rui Tian
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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32
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Sun D, Zhang H, Zhang X, Yang J. Robust Metallic Microcapsules: A Direct Path to New Multifunctional Materials. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9621-9628. [PMID: 30729779 DOI: 10.1021/acsami.9b00827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Robustness of microcapsule shells determined the service life and application areas of final smart materials including self-healing composites, anticorrosion coatings, smart concretes, and so on. Herein, we designed and synthesized metal microcapsules by conducting electroless plating directly on liquid droplet surfaces, and metal shells showed superior stability in thermal (600 °C) and polar solvents (acetone and N,N-dimethylformamide) environments. More interestingly, the mechanical strength of metal shells was ten times higher than those of all published microcapsules. Besides, the smart epoxy composites remained stable mechanical properties with metal microcapsule concentrations, and this is the first time to report such results. For engineering materials, mechanical properties played an important role in practical applications, and a higher strength usually accompanied with better safety and longer service life. The microcapsules with designable structures could be synthesized by adjusting shell thickness and core fractions for practical requirements. The metal microcapsules had great potentials to be applied in a smart metallic matrix, conductive multifunctional materials, and pH-responsive materials. In addition, the electroless plating technique was also first applied to liquid surfaces pushing the development of novel smart materials.
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Affiliation(s)
- Dawei Sun
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Kowloon 999077 , Hong Kong SAR
- College of Materials Science and Engineering , Beijing University of Technology , Beijing 100124 , China
| | - He Zhang
- Key Laboratory of Polymer Processing Engineering of the Ministry of Education, National Engineering Research Center of Novel Equipment for Polymer Processing , South China University of Technology , Guangzhou 510640 , China
| | - Xin Zhang
- School of Civil and Environmental Engineering , Nanyang Technological University , 639798 , Singapore
| | - Jinglei Yang
- Department of Mechanical and Aerospace Engineering , The Hong Kong University of Science and Technology , Kowloon 999077 , Hong Kong SAR
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33
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Li K, Lin Y, Lu C. Aggregation-Induced Emission for Visualization in Materials Science. Chem Asian J 2019; 14:715-729. [PMID: 30629327 DOI: 10.1002/asia.201801760] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/05/2019] [Indexed: 12/31/2022]
Abstract
Fluorescent imaging techniques have attracted much attention as a powerful tool to realize the visualization of structural and morphological evolution of various materials. However, the traditional fluorescent dyes usually suffered from aggregation-caused quenching, which severely limits the visualization results. In contrast, aggregation-induced emission (AIE) molecules with high quantum yields in the condensed state showed great opportunities for imaging techniques. In this feature article, recent progresses in visualization with AIE molecules are discussed. Assembly processes including crystallization, gelation process, and dissipative assembly have been observed. To better study information obtained regarding the processes, visualization during reactions, phase transitions, and molecular motions are successfully presented. Based on these successes, AIE molecules were further applied for phase recognition, macro-dispersion evaluation, and damage detection. Finally, we also present the outlook and perspectives, in our opinion, for the development of visualization by AIE molecules.
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Affiliation(s)
- Kaitao Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 79, 100029, Beijing, China
| | - Yanjun Lin
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 79, 100029, Beijing, China
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 79, 100029, Beijing, China
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34
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Mosby B, Shah S, Braun PV. Salt Water-Triggered Ionic Cross-Linking of Polymer Composites by Controlled Release of Functional Ions. ACS OMEGA 2018; 3:16127-16133. [PMID: 31458249 PMCID: PMC6643778 DOI: 10.1021/acsomega.8b02786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 11/14/2018] [Indexed: 06/10/2023]
Abstract
A composite that undergoes ionic cross-linking in the presence of salt water is presented as a viable strategy for the development of chemically responsive materials. The permeation of salt water through the composite activates embedded inorganic fillers, resulting in the release of functional ions and subsequent cross-linking with the functional groups of the polymer matrix. The release of a cross-linking agent from the inorganic filler and composite is evaluated along with the impact of the cross-linking on composite properties. The new methodology is then coupled with a dopamine-functionalized polymer in order to evaluate the potential of this approach for environmentally triggered self-healing materials.
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35
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Lu X, Li W, Sottos NR, Moore JS. Autonomous Damage Detection in Multilayered Coatings via Integrated Aggregation-Induced Emission Luminogens. ACS APPLIED MATERIALS & INTERFACES 2018; 10:40361-40365. [PMID: 30430834 DOI: 10.1021/acsami.8b16454] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Detection and assessment of small-scale damage at early stages are essential for polymeric materials to extend lifetime, avoid catastrophic structural failure, and improve cost-efficiency. Previous self-reporting coatings provide visual indication of surface damage but have been limited to a single layer without information on the depth of crack penetration. Here, we present a novel strategy for autonomous indication of damage in multilayered polymeric materials using aggregation-induced emission luminogens (AIEgens). Three different AIEgens are encapsulated and layered into polymeric coatings. When scratches of varying depths penetrate the coating layers, different combinations of AIEgens are activated to visually detect the depth of damage based on the corresponding fluorescent colors. The AIEgen-based detection mechanism makes this system a powerful tool for damage indication in a variety of polymeric coatings.
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36
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Calvino C, Weder C. Microcapsule-Containing Self-Reporting Polymers. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1802489. [PMID: 30265445 DOI: 10.1002/smll.201802489] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/28/2018] [Indexed: 06/08/2023]
Abstract
Self-reporting polymers, which can indicate damage or exposure to excessive stress with a clearly perceptible optical signal, are potentially useful for several technological applications, including stress-sensitive sensors that enable in situ monitoring of mechanical events and structural health monitoring systems. A versatile and simple concept to realize this function is the exploitation of microcapsules that are filled with solutions of dyes that are released and chemically or physically activated when the protective shell is damaged. Such microcapsules can readily be incorporated into polymers and the composites thus made can be processed into films, coatings, or other objects. Mechanochromic effects can be realized with different types of dyes and activation schemes. In this concept article, a selection of recent key studies is presented to provide an overview of the state of the field. Different architectures and operating principles and their advantages and drawbacks are reviewed. The parameters that influence the design of microcapsule-based mechanochromic systems are considered and unexplored chromophore systems that might be useful to design future self-reporting polymers are discussed. Finally, specific aspects of capsule design, fabrication, and integration into polymers are presented. Throughout the article, challenges and opportunities of the concept are highlighted and possible future directions are discussed.
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Affiliation(s)
- Céline Calvino
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, CH-1700, Fribourg, Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, CH-1700, Fribourg, Switzerland
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37
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Odarczenko M, Thakare D, Li W, Yang K, Tang S, Venkateswaran SP, Sottos NR, White SR. Self-Protecting Epoxy Coatings with Anticorrosion Microcapsules. ACS OMEGA 2018; 3:14157-14164. [PMID: 31458108 PMCID: PMC6644468 DOI: 10.1021/acsomega.8b01950] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/08/2018] [Indexed: 05/24/2023]
Abstract
The corrosion of steel substrates causes damage that is costly to repair or replace. Current protective coatings predominately rely on environmentally harmful anticorrosive agents and toxic solvents to protect the underlying substrate. The use of lawsone (2-hydroxy-1,4-napthoquinone) together with a water-based epoxy coating provides an environmentally friendly alternative for common protective coatings. Microencapsulated lawsone embedded in an epoxy coating allows the anticorrosive agent to remain dormant until released by damage and delivered directly onto the steel substrate. UV-vis analysis confirms successful encapsulation of lawsone in a polyurethane shell wall and reveals up to 8 wt % lawsone in the capsule cores. Uniform dry film thickness and inflicted damaged are verified with ultrasound and optical microscopy. Visual and electrochemical analysis demonstrates that this self-protective scheme leads to a 70% corrosion inhibition efficiency in a neutral salt water solution.
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Affiliation(s)
- Michael Odarczenko
- Aerospace
Engineering, University of Illinois, 104 S. Wright Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
| | - Dhawal Thakare
- Mechanical
Engineering, University of Illinois, 1206 W. Green Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
| | - Wenle Li
- Material
Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
| | - Ke Yang
- Material
Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
| | - Shijia Tang
- Material
Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
| | | | - Nancy R. Sottos
- Material
Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
| | - Scott R. White
- Aerospace
Engineering, University of Illinois, 104 S. Wright Street, Urbana, Illinois 61801, United States
- Beckman
Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United
States
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38
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Calvino C, Guha A, Weder C, Schrettl S. Self-Calibrating Mechanochromic Fluorescent Polymers Based on Encapsulated Excimer-Forming Dyes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1704603. [PMID: 29345378 DOI: 10.1002/adma.201704603] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 10/09/2017] [Indexed: 06/07/2023]
Abstract
While mechanochemical transduction principles are omnipresent in nature, mimicking these in artificial materials is challenging. The ability to reliably detect the exposure of man-made objects to mechanical forces is, however, of great interest for many applications, including structural health monitoring and tamper-proof packaging. A useful concept to achieve mechanochromic responses in polymers is the integration of microcapsules, which rupture upon deformation and release a payload causing a visually detectable response. Herein, it is reported that this approach can be used to create mechanochromic fluorescent materials that show a direct and ratiometric response to mechanical deformation. This can be achieved by filling poly(urea-formaldehyde) microcapsules with a solution of a photoluminescent aggregachromic cyano-substituted oligo(p-phenylene vinylene) and embedding these particles in poly(dimethylsiloxane). The application of mechanical force by way of impact, incision, or tensile deformation opens the microcapsules and releases the fluorophore in the damaged area. Due to excimer formation, the subsequent aggregation of the dye furnishes a detectable fluorescence color change. With the emission from unopened microcapsules as built-in reference, the approach affords materials that are self-calibrating. This new concept appears to be readily applicable to a range of polymer matrices and allows for the straightforward assessment of their structural integrity.
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Affiliation(s)
- Céline Calvino
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, CH-1700, Fribourg, Switzerland
| | - Anirvan Guha
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, CH-1700, Fribourg, Switzerland
| | - Christoph Weder
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, CH-1700, Fribourg, Switzerland
| | - Stephen Schrettl
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, CH-1700, Fribourg, Switzerland
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39
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Rifaie-Graham O, Apebende EA, Bast LK, Bruns N. Self-Reporting Fiber-Reinforced Composites That Mimic the Ability of Biological Materials to Sense and Report Damage. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1705483. [PMID: 29573286 DOI: 10.1002/adma.201705483] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/29/2017] [Indexed: 06/08/2023]
Abstract
Sensing of damage, deformation, and mechanical forces is of vital importance in many applications of fiber-reinforced polymer composites, as it allows the structural health and integrity of composite components to be monitored and microdamage to be detected before it leads to catastrophic material failure. Bioinspired and biomimetic approaches to self-sensing and self-reporting materials are reviewed. Examples include bruising coatings and bleeding composites based on dye-filled microcapsules, hollow fibers, and vascular networks. Force-induced changes in color, fluorescence, or luminescence are achieved by mechanochromic epoxy resins, or by mechanophores and force-responsive proteins located at the interface of glass/carbon fibers and polymers. Composites can also feel strain, stress, and damage through embedded optical and electrical sensors, such as fiber Bragg grating sensors, or by resistance measurements of dispersed carbon fibers and carbon nanotubes. Bioinspired composites with the ability to show autonomously if and where they have been damaged lead to a multitude of opportunities for aerospace, automotive, civil engineering, and wind-turbine applications. They range from safety features for the detection of barely visible impact damage, to the real-time monitoring of deformation of load-bearing components.
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Affiliation(s)
- Omar Rifaie-Graham
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Edward A Apebende
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Livia K Bast
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Nico Bruns
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
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40
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Pu W, Fu D, Wang Z, Gan X, Lu X, Yang L, Xia H. Realizing Crack Diagnosing and Self-Healing by Electricity with a Dynamic Crosslinked Flexible Polyurethane Composite. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1800101. [PMID: 29876226 PMCID: PMC5978978 DOI: 10.1002/advs.201800101] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 01/22/2018] [Indexed: 05/14/2023]
Abstract
Combining self-healing functions with damage diagnosing, which can achieve timely healing autonomously, is expected to improve the reliability and reduce life cycle cost of materials. Here, a flexible conductive composite composed of a dynamically crosslinked polyurethane bearing Diels-Alder bonds (PUDA) and carbon nanotubes (CNTs), which possess both crack diagnosing and self-healing functions, is reported. The introduced dynamic Diels-Alder bonds endow the materials self-healing function and the powder-based preparation route based on the specially designed CNTs-coated PUDA micropowders leads to the formation of segregated CNTs network, which makes the composite possess excellent mechanical properties and high conductivity. Because of the sufficient electrothermal and photothermal effect of CNTs, the composites can be healed rapidly and repeatedly by electricity or near-infrared light based on the retro-Diels-Alder reaction. An obvious color difference in the infrared thermograph resulting from the resistance difference between damaged and undamaged area can be observed when applying the voltage, which can be used for crack diagnosing. Using the same electrical circuit, the crack in the PUDA/CNTs composite can be noninvasively detected first and then be autonomously healed. The composites also exhibit a strain-sensing function with good sensitivity and high reliability, thus will have potential applications in electronic strain sensors.
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Affiliation(s)
- Wuli Pu
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Daihua Fu
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Zhanhua Wang
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Xinpeng Gan
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Xili Lu
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Li Yang
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials EngineeringPolymer Research InstituteSichuan UniversityChengdu610065China
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41
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Burel CAS, Alsayed A, Malassis L, Murray CB, Donnio B, Dreyfus R. Plasmonic-Based Mechanochromic Microcapsules as Strain Sensors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701925. [PMID: 28834168 DOI: 10.1002/smll.201701925] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/10/2017] [Indexed: 06/07/2023]
Abstract
Efficiently detecting mechanical deformations within materials is critical in a wide range of devices, from micro-electromechanical systems to larger structures in the aerospace industry. This communication reports the fabrication of new mechanochromic micrometer-size capsules enabling the detection of strains. These microcapsules are synthesized using an emulsification approach. They are made of densely packed gold nanoparticles embedded in a spherical silica crust. Billions of these composite spherical microcapsules are fabricated in a single batch. Each microcapsule is an opto-mechanosensor by itself, and can easily be recovered and incorporated into polymer films. When the films are stretched, the microcapsules are deformed into elongated ellipsoidal shapes and the distance between the Au NPs embedded in their shells concomitantly increases. As the extinction of Au NPs depends on the separation between the Au NPs, microcapsules exhibit different colors when they are elongated. These novel sensitive microcapsules can be used to detect and measure strain in polymer films by outputting color information.
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Affiliation(s)
- Céline A S Burel
- Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, RIC, Bristol, PA, 19007, USA
| | - Ahmed Alsayed
- Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, RIC, Bristol, PA, 19007, USA
| | - Ludivine Malassis
- Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, RIC, Bristol, PA, 19007, USA
| | - Christopher B Murray
- Department of Chemistry and Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Bertrand Donnio
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg, UMR 7504, 67034, Strasbourg, France
| | - Rémi Dreyfus
- Complex Assemblies of Soft Matter Laboratory (COMPASS), UMI 3254, CNRS-Solvay-University of Pennsylvania, RIC, Bristol, PA, 19007, USA
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42
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Rao YL, Feig V, Gu X, Nathan Wang GJ, Bao Z. The effects of counter anions on the dynamic mechanical response in polymer networks crosslinked by metal-ligand coordination. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28675] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ying-Li Rao
- Department of Chemical Engineering; Stanford University; Stanford California 94305
| | - Vivian Feig
- Department of Materials Science and Engineering; Stanford University; Stanford California 94305
| | - Xiaodan Gu
- Department of Chemical Engineering; Stanford University; Stanford California 94305
| | - Ging-Ji Nathan Wang
- Department of Chemical Engineering; Stanford University; Stanford California 94305
| | - Zhenan Bao
- Department of Chemical Engineering; Stanford University; Stanford California 94305
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43
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Polymers with autonomous life-cycle control. Nature 2017; 540:363-370. [PMID: 27974778 DOI: 10.1038/nature21002] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 10/12/2016] [Indexed: 12/21/2022]
Abstract
The lifetime of man-made materials is controlled largely by the wear and tear of everyday use, environmental stress and unexpected damage, which ultimately lead to failure and disposal. Smart materials that mimic the ability of living systems to autonomously protect, report, heal and even regenerate in response to damage could increase the lifetime, safety and sustainability of many manufactured items. There are several approaches to achieving these functions using polymer-based materials, but making them work in highly variable, real-world situations is proving challenging.
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44
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Song YK, Kim B, Lee TH, Kim JC, Nam JH, Noh SM, Park YI. Fluorescence Detection of Microcapsule-Type Self-Healing, Based on Aggregation-Induced Emission. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201600657] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/05/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Young Kyu Song
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
| | - Beomjin Kim
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
| | - Tae Hee Lee
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
- Department of Chemical Engineering; Ulsan National Institute of Science and Technology; Ulsan 44919 Republic of Korea
| | - Jin Chul Kim
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
| | - Joon Hyun Nam
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
| | - Seung Man Noh
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
| | - Young Il Park
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 44412 Republic of Korea
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45
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Guo Y, Zhao P, Wang X, Xu D, Zhong J, Yue G, Shuai M. Damage indication of 2′, 7′-dichlorofluorescein for epoxy polymer and the effect of water on its damage indicating ability. E-POLYMERS 2017. [DOI: 10.1515/epoly-2016-0135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AbstractEpoxy polymer with damage indicating ability was very usable for ships and bridges to detect the cracks at an early stage and to prevent corrosion. 2′, 7′-dichlorofluorescein (DCF), as a damage indicator, was used to report the mechanical damage of epoxy-amine polymer by a strong color change from a light yellow to bright red due to the molecular structure transition from the acid molecular form to the base ion form. The effect of water on damage indicator and damaged epoxy-amine polymer film was evaluated by an immersion test and the properties were characterized by ultraviolet-visible spectrophotometry (UV-Vis), scanning electronic microscopy (SEM), energy dispersive X-ray spectrometer (EDS), zeta potential and thermal gravimetric analysis (TGA). The results showed that DCF was an easy, stable and permanent indicator for epoxy-amine polymer and the water only had a slight influence on the indication stability of damaged epoxy polymer.
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Affiliation(s)
- Yakun Guo
- 1Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, P. R. China
| | - Pengxiang Zhao
- 1Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, P. R. China
| | - Xiaofang Wang
- 1Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, P. R. China
| | - Duigong Xu
- 1Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, P. R. China
| | - Jingrong Zhong
- 1Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, P. R. China
| | - Guozong Yue
- 1Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, P. R. China
| | - Maobing Shuai
- 2Institute of Materials, China Academy of Engineering Physics, Mailbox No.9-21, Huafengxincun, Jiangyou 621908, Sichuan, P. R. China, Tel.: 0086 816 3620190
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46
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Araujo JV, Rifaie-Graham O, Apebende EA, Bruns N. Self-reporting Polymeric Materials with Mechanochromic Properties. BIO-INSPIRED POLYMERS 2016. [DOI: 10.1039/9781782626664-00354] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The mechanical transduction of force onto molecules is an essential feature of many biological processes that results in the senses of touch and hearing, gives important cues for cellular interactions and can lead to optically detectable signals, such as a change in colour, fluorescence or chemoluminescence. Polymeric materials that are able to visually indicate deformation, stress, strain or the occurrence of microdamage draw inspiration from these biological events. The field of self-reporting (or self-assessing) materials is reviewed. First, mechanochromic events in nature are discussed, such as the formation of bruises on skin, the bleeding of a wound, or marine glow caused by dinoflagellates. Then, materials based on force-responsive mechanophores, such as spiropyrans, cyclobutanes, cyclooctanes, Diels–Alder adducts, diarylbibenzofuranone and bis(adamantyl)-1,2-dioxetane are reviewed, followed by mechanochromic blends, chromophores stabilised by hydrogen bonds, and pressure sensors based on ionic interactions between fluorescent dyes and polyelectrolyte brushes. Mechanobiochemistry is introduced as an important tool to create self-reporting hybrid materials that combine polymers with the force-responsive properties of fluorescent proteins, protein FRET pairs, and other biomacromolecules. Finally, dye-filled microcapsules, microvascular networks, and hollow fibres are demonstrated to be important technologies to create damage-indicating coatings, self-reporting fibre-reinforced composites and self-healing materials.
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Affiliation(s)
- Jose V. Araujo
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Omar Rifaie-Graham
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Edward A. Apebende
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
| | - Nico Bruns
- Adolphe Merkle Institute, University of Fribourg Chemin des Verdiers 4 1700 Fribourg Switzerland
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47
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Robb M, Li W, Gergely RCR, Matthews CC, White S, Sottos NR, Moore JS. A Robust Damage-Reporting Strategy for Polymeric Materials Enabled by Aggregation-Induced Emission. ACS CENTRAL SCIENCE 2016; 2:598-603. [PMID: 27725956 PMCID: PMC5043436 DOI: 10.1021/acscentsci.6b00198] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Indexed: 05/05/2023]
Abstract
Microscopic damage inevitably leads to failure in polymers and composite materials, but it is difficult to detect without the aid of specialized equipment. The ability to enhance the detection of small-scale damage prior to catastrophic material failure is important for improving the safety and reliability of critical engineering components, while simultaneously reducing life cycle costs associated with regular maintenance and inspection. Here, we demonstrate a simple, robust, and sensitive fluorescence-based approach for autonomous detection of damage in polymeric materials and composites enabled by aggregation-induced emission (AIE). This simple, yet powerful system relies on a single active component, and the general mechanism delivers outstanding performance in a wide variety of materials with diverse chemical and mechanical properties.
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Affiliation(s)
- Maxwell
J. Robb
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Wenle Li
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Ryan C. R. Gergely
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Christopher C. Matthews
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Scott
R. White
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
| | - Nancy R. Sottos
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
- E-mail:
| | - Jeffrey S. Moore
- The Beckman Institute for Advanced Science
and Technology, Department of Chemistry, Department of Materials
Science and Engineering, Department of Mechanical Science and Engineering, and Department of Aerospace
Engineering, University of Illinois at Urbana—Champaign, Urbana, Illinois 61801, United States
- E-mail:
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48
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Li Z, Toivola R, Ding F, Yang J, Lai PN, Howie T, Georgeson G, Jang SH, Li X, Flinn BD, Jen AKY. Highly Sensitive Built-In Strain Sensors for Polymer Composites: Fluorescence Turn-On Response through Mechanochemical Activation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:6592-6597. [PMID: 27184010 DOI: 10.1002/adma.201600589] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/06/2016] [Indexed: 06/05/2023]
Abstract
A new class of rationally designed mechanophores is developed for highly sensitive built-in strain sensors in polymer composites. These mechanophores are designed to regenerate the π-conjugation pathway between the electron donor and electron acceptor by force-induced cleavage of the covalent bond to form a fluorescent dipolar dye.
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Affiliation(s)
- Zhong'an Li
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Ryan Toivola
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Feizhi Ding
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | - Jeffrey Yang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Po-Ni Lai
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Tucker Howie
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | | | - Sei-Hum Jang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | - Brian D Flinn
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Alex K-Y Jen
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
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49
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Guo YK, Chen L, Xu DG, Zhong JR, Yue GZ, Astruc D, Shuai MB, Zhao PX. A dual functional epoxy material with autonomous damage indication and self-healing. RSC Adv 2016. [DOI: 10.1039/c6ra13519f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Autonomous indication of mechanical damage and self-healing epoxy materials was conducted using 2′,7′-dichlorofluorescein (DCF) and glycidyl methacrylate (GMA) solution.
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Affiliation(s)
- Y. K. Guo
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
| | - L. Chen
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
| | - D. G. Xu
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
| | - J. R. Zhong
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
| | - G. Z. Yue
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
| | - D. Astruc
- ISM
- University Bordeaux
- Talence Cedex 33405
- France
| | - M. B. Shuai
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
| | - P. X. Zhao
- Institute of Materials
- China Academy of Engineering Physics
- Jiangyou City
- P. R. China
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