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Rammohan A, Krinochkin AP, Khasanov AF, Kopchuk DS, Zyryanov GV. Sustainable Solvent-Free Diels-Alder Approaches in the Development of Constructive Heterocycles and Functionalized Materials: A Review. Top Curr Chem (Cham) 2022; 380:43. [PMID: 35951264 DOI: 10.1007/s41061-022-00398-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 06/15/2022] [Indexed: 10/15/2022]
Abstract
The Diels-Alder reaction (DAR) is found in myriad applications in organic synthesis and medicinal chemistry for drug development, as it is the method of choice for the expedient synthesis of complex natural compounds and innovative materials including nanomaterials, graphene expanses, and polymeric nanofibers. Furthermore, the greatest focus of attention of DARs is on the consistent reaction procedure with stimulus yields by highly stereo- and regioselective mechanistic pathways. Therefore, the present review is intended to summarize conventional solvent-free (SF) DARs for the expedient synthesis of heterocyclic compounds and materials. In particular, this review deals with the DARs of mechanochemical grinding, catalysis (including stereoselective catalysts), thermal, and electromagnetic radiation (such as microwave [MW], infrared [IR], and ultraviolet [UV] irradiation) in SF procedures. Therefore, this comprehensive review validates the application of DARs to pharmaceutical innovations and biorenewable materials through consistent synthetic approaches.
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Affiliation(s)
- Aluru Rammohan
- Ural Federal University, 19 Mira St., Ekaterinburg, 620002, Russian Federation.
| | - Alexey P Krinochkin
- Ural Federal University, 19 Mira St., Ekaterinburg, 620002, Russian Federation.,I. Ya. Postovsky Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 S. Kovalevskoy St., Ekaterinburg, 620219, Russian Federation
| | - Albert F Khasanov
- Ural Federal University, 19 Mira St., Ekaterinburg, 620002, Russian Federation.,I. Ya. Postovsky Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 S. Kovalevskoy St., Ekaterinburg, 620219, Russian Federation
| | - Dmitry S Kopchuk
- Ural Federal University, 19 Mira St., Ekaterinburg, 620002, Russian Federation.,I. Ya. Postovsky Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 S. Kovalevskoy St., Ekaterinburg, 620219, Russian Federation
| | - Grigory V Zyryanov
- Ural Federal University, 19 Mira St., Ekaterinburg, 620002, Russian Federation. .,I. Ya. Postovsky Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 S. Kovalevskoy St., Ekaterinburg, 620219, Russian Federation.
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Cantamessa F, Damonte G, Monticelli O, Arrigo R, Fina A. Thermoreversible Cross-Linked Rubber Prepared via Melt Blending and Its Nanocomposites. ACS APPLIED POLYMER MATERIALS 2022; 4:4796-4807. [PMID: 35846782 PMCID: PMC9274616 DOI: 10.1021/acsapm.2c00416] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A covalent adaptable network based on the thermoreversible cross-linking of an ethylene-propylene rubber through Diels-Alder (DA) reaction was prepared for the first time through melt blending as an environmental-friendly alternative to traditional synthesis in organic solvents. Functionalization of the rubber with furan groups was performed in a melt blender and subsequently mixed with different amounts of bismaleimide in a microextruder. Cross-linking was confirmed by FT-IR spectroscopy and insolubility at room temperature, while its thermoreversible character was confirmed by a solubility test at 110 °C and by remolding via hot-pressing. Mechanical and thermomechanical properties of the obtained rubbers showed potential to compete with conventionally cross-linked elastomers, with stiffness in the range 1-1.7 MPa and strain at break in the range 200-500%, while allowing recycling via a simple melt processing step. Nanocomposites based on the thermoreversible rubber were prepared with reduced graphene oxide (rGO), showing significantly increasing stiffness up to ca. 8 MPa, ∼2-fold increased strength, and thermal conductivity up to ∼0.5 W/(m K). Results in this paper may open for industrially viable and sustainable applications of thermoreversible elastomers.
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Affiliation(s)
- Francesco Cantamessa
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, 15121 Alessandria, Italy
| | - Giacomo Damonte
- Dipartimento
di Chimica e Chimica Industriale, Università
di Genova, 16146 Genova, Italy
| | - Orietta Monticelli
- Dipartimento
di Chimica e Chimica Industriale, Università
di Genova, 16146 Genova, Italy
| | - Rossella Arrigo
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, 15121 Alessandria, Italy
| | - Alberto Fina
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, 15121 Alessandria, Italy
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Torkaman NF, Kley M, Bremser W, Wilhelm R. Reversible functionalization and exfoliation of graphite by a Diels-Alder reaction with furfuryl amine. RSC Adv 2022; 12:17249-17256. [PMID: 35765460 PMCID: PMC9186115 DOI: 10.1039/d2ra02566c] [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: 04/22/2022] [Accepted: 05/31/2022] [Indexed: 11/21/2022] Open
Abstract
Furfuryl amine-functionalized few-layered graphene was prepared via a mechanochemical process by a [4 + 2] cycloaddition under solvent-free conditions. By employing ball milling, active sites are merged mostly at the edge of the graphene sheets which makes them prone to Diels–Alder click reactions (D–A) in the presence of a diene precursor. Consequently, one-pot grafting with furfuryl amine onto the graphene sheets, exfoliates pristine graphite resulting in functionalized few-layered graphene which is soluble in organic solvents. Thereafter, the cleavage of the bonds in the adduct can occur by exposure to an external stimulus like temperature, to initiate a retro-Diels–Alder reaction. The success of the thermoreversible functionalization of the few-layered graphene was confirmed by Raman spectroscopy, TGA, XPS, EDX, contact angle and XRD analysis. The morphology of the samples was investigated by scanning electron microscopy and AFM. The latter was utilized to estimate graphene thickness. The results showed that functionalization proceeded under nitrogen with dry ball milling and mild temperatures efficiently. Furfuryl amine-functionalized few-layered graphene was prepared via a mechanochemical process by a [4 + 2] cycloaddition under solvent-free conditions.![]()
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Affiliation(s)
- Najmeh Filvan Torkaman
- Paderborn University, Faculty of Mechanical Engineering, Coatings, Materials and Polymers (CMP), Technology and Diversity (TD) Warburger Str. 100 33098 Paderborn Germany
| | - Marina Kley
- Paderborn University, Faculty of Mechanical Engineering, Coatings, Materials and Polymers (CMP) Warburger Str. 100 33098 Paderborn Germany
| | - Wolfgang Bremser
- Paderborn University, Faculty of Mechanical Engineering, Coatings, Materials and Polymers (CMP) Warburger Str. 100 33098 Paderborn Germany
| | - René Wilhelm
- Clausthal University of Technology, Institute for Organic Chemistry Leibnizstrasse 6, 38678 Clausthal-Zellerfeld Germany
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Wang Y, Zhou Z, Chen J, Li S, Zheng H, Lu J, Wang S, Zhang J, Lin K, Wang K, Wang Y. Self-Healing Silver Nanowires and Reduced Graphene Oxide/Polyurethane Composite Film Based on the Diels–Alder Reaction under Infrared Radiation. MEMBRANES 2022; 12:membranes12040405. [PMID: 35448375 PMCID: PMC9030009 DOI: 10.3390/membranes12040405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/29/2022] [Accepted: 04/01/2022] [Indexed: 02/04/2023]
Abstract
The hybrid composite of silver nanowires (AgNWs) and reduced graphene oxide (RGO) was synthesized in situ by an improved polyol–thermal method. The AgNWs-RGO with mass contents of 5–37 wt% was added into the thermo-reversible Diels–Alder reaction polyurethane (DA-PU) matrix with the AgNWs as the main conductor and the RGO as the auxiliary conductor to prepare self-healing composite conductive films. Further, the electrical conductivity, thermal conductivity, mechanical properties, infrared thermal response, and self-healing property of the composite film under infrared light irradiation were studied. The experimental results demonstrate that the AgNWs-RGO endows the composite film with good electrical and thermal conductivity and infrared thermal response ability, while the mechanical properties of the composite film decrease as the AgNWs-RGO mass content increases. The self-healing efficiency of the composite film is higher than that of the pure DA-PU under infrared light irradiation due to the good infrared photothermal response ability of the AgNWs-RGO. When the mass content of AgNWs-RGO in the composite film was 25 wt%, the AgNWs-RGO showed good dispersion in composite films, and the resistivity, thermal conductivity, and tensile strength of the composite film were 0.544 Ω·m, 0.3039 W·m−1·K−1, and 9.05 MPa, respectively. The infrared photothermal conversion temperature of the composite film is 158.5 °C (3450 lux for 1 min), and the infrared photothermal self-healing efficiency is 118% (3450 lux for 600 s). The AgNWs-RGO also improves the multiple self-healing ability of the composite film. The use of a high mass content of AgNWs-RGO in the composite film is beneficial in obtaining high multiple self-healing efficiencies. The first and the fifth infrared thermal self-healing efficiencies of the composite film with AgNWs-RGO of 35 wt% are 105% and 86%, respectively, and the resistivity of the composite film changes little and still maintains good conductivity.
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Influence of Characteristics of Thermoplastic Polyurethane on Graphene-Thermoplastic Polyurethane Composite Film. MICROMACHINES 2021; 12:mi12020129. [PMID: 33530426 PMCID: PMC7911175 DOI: 10.3390/mi12020129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 01/19/2021] [Accepted: 01/24/2021] [Indexed: 01/03/2023]
Abstract
Graphene-thermoplastic polyurethane (G-TPU) composite films were fabricated by traditional blending method and tape casting process with commercial graphene sheets as functional fillers and TPU masterbatches of four different melting points as matrix, respectively. The effects of matrix on the distribution of graphene, the electrical conductivity, and infrared (IR) light thermal properties of the G-TPU composite films were investigated. The experimental results reveal that the characteristics of TPU has little influence on the electrical conductivity of the G-TPU composite films, although the four TPU solutions have different viscosities. However, under the same graphene mass content, the thermal conductivity of four G-TPU composite films with different melting points is significantly different. The four kinds of G-TPU composite films have obvious infrared (IR) thermal effect. There is little difference in the temperatures between the composite films prepared by TPU with melting a point of 100 °C, 120 °C, and 140 °C, respectively; however, when the content of graphene is less than 5 wt%, the temperature of the composite film prepared by TPU with a melting point of 163 °C is obviously lower than that of the other three composite films. The possible reason for this phenomenon is related to the structure of TPU.
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Kim SO, Han CJ, Lee CR, Lee HJ, Kim Y, Kim JW. Ultrafast Photoinduced Interconnection of Metal-Polymer Composites for Fabrication of Transparent and Stretchable Electronic Skins. ACS APPLIED MATERIALS & INTERFACES 2020; 12:39695-39704. [PMID: 32805839 DOI: 10.1021/acsami.0c12362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The high interest sparked by the foldable smartphones recently released on the market is gradually shifting to the next generation of flexible electronic devices, such as electronic skins in the form of stretchable thin films. To develop such devices, good mechanical flexibility of all components (including the substrate, electrode, and encapsulant) is critical. Various technologies have been developed to enhance the flexibility of these components; however, progress in developing interconnection methods for flexible and stretchable devices has been limited. Here, we developed an ultrafast photoinduced interconnection method that does not require any adhesive or surface treatment. This method is based on heating metal nanostructures using intense pulsed light (IPL) and the reversible cross-linking of polymers. First, we synthesized a stretchable, transparent, and free-standing polymer substrate that can be reversibly cross-linked, and then Ag nanowire (AgNW) networks were formed on its surface. This electrode was irradiated with IPL, which locally heated the AgNWs, followed by decomposition of the polymer via the retro-Diels-Alder reaction and recross-linking. Independently fabricated AgNW/polymer films were layered and irradiated three times with IPL to form a bonded sample with excellent joint quality and no increase in electrical resistance compared to a single electrode. Furthermore, the interconnected electrodes were stretchable and optically transparent. Even when more than 200% strain was applied in a peel test, no breakage at the joint was observed. This allowed us to successfully produce a stretchable, transparent, and bending-insensitive pressure sensor for various applications such as motion detectors or pressure sensor arrays.
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Affiliation(s)
- Sun Ok Kim
- School of Advanced Materials Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 54896, Republic of Korea
| | - Chul Jong Han
- Display Research Center, Korea Electronics Technology Institute, 25 Saenariro, Bundang-gu, Seongnam 13509, Republic of Korea
| | - Cheul-Ro Lee
- School of Advanced Materials Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 54896, Republic of Korea
| | - Hee-Jin Lee
- Display Research Center, Korea Electronics Technology Institute, 25 Saenariro, Bundang-gu, Seongnam 13509, Republic of Korea
| | - Youngmin Kim
- Display Research Center, Korea Electronics Technology Institute, 25 Saenariro, Bundang-gu, Seongnam 13509, Republic of Korea
| | - Jong-Woong Kim
- School of Advanced Materials Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 54896, Republic of Korea
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Wang K, Zhou Z, Zhang J, Tang J, Wu P, Wang Y, Zhao Y, Leng Y. Electrical and Thermal and Self-Healing Properties of Graphene-Thermopolyurethane Flexible Conductive Films. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E753. [PMID: 32326612 PMCID: PMC7221931 DOI: 10.3390/nano10040753] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 04/09/2020] [Indexed: 12/30/2022]
Abstract
We fabricated graphene-thermopolyurethane (G-TPU) flexible conductive film by a blending method and systematically investigated the electrical, thermal and self-healing properties of the G-TPU flexible conductive film by infrared light and electricity. The experimental results demonstrate that the G-TPU composite films have good conductivity and thermal conductivity in the appropriate mass content of graphene in the composite film. The composite films have the good electro-thermal and infrared light thermal response performances and electro-thermal response performance is closely related to the mass content of graphene in the composite film, but the infrared light thermal response performance is not. The scratch on the composite film can be completely healed, using electricity or infrared light. The healing efficiency of the composite film healed using infrared light is higher than that of using the electricity, while the healing time of the composite film is shorter. Regardless of the self-healing method, the temperature of the self-healing is a very important factor. The self-healing conductive composite film still exhibits a good conductivity.
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Affiliation(s)
- Ke Wang
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, Guangdong, China; (K.W.); (Z.Z.); (J.Z.); (J.T.); (P.W.)
| | - Zhimin Zhou
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, Guangdong, China; (K.W.); (Z.Z.); (J.Z.); (J.T.); (P.W.)
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Jiahao Zhang
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, Guangdong, China; (K.W.); (Z.Z.); (J.Z.); (J.T.); (P.W.)
| | - Jinyuan Tang
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, Guangdong, China; (K.W.); (Z.Z.); (J.Z.); (J.T.); (P.W.)
| | - Peiyu Wu
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, Guangdong, China; (K.W.); (Z.Z.); (J.Z.); (J.T.); (P.W.)
| | - Yuehui Wang
- Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, Guangdong, China; (K.W.); (Z.Z.); (J.Z.); (J.T.); (P.W.)
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yuzhen Zhao
- Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
| | - Yong Leng
- Zhongshan Breathtex Speciality Material Co., Ltd., Zhongshan 528441, Guangdong, China;
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Huang HJ, Tsai YL, Lin SH, Hsu SH. Smart polymers for cell therapy and precision medicine. J Biomed Sci 2019; 26:73. [PMID: 31623607 PMCID: PMC6798433 DOI: 10.1186/s12929-019-0571-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/01/2019] [Indexed: 12/28/2022] Open
Abstract
Soft materials have been developed very rapidly in the biomedical field over the past 10 years because of advances in medical devices, cell therapy, and 3D printing for precision medicine. Smart polymers are one category of soft materials that respond to environmental changes. One typical example is the thermally-responsive polymers, which are widely used as cell carriers and in 3D printing. Self-healing polymers are one type of smart polymers that have the capacity to recover the structure after repeated damages and are often injectable through needles. Shape memory polymers are another type with the ability to memorize their original shape. These smart polymers can be used as cell/drug/protein carriers. Their injectability and shape memory performance allow them to be applied in bioprinting, minimally invasive surgery, and precision medicine. This review will describe the general materials design, characterization, as well as the current progresses and challenges of these smart polymers.
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Affiliation(s)
- Hung-Jin Huang
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei, 10617, Taiwan, Republic of China
| | - Yu-Liang Tsai
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei, 10617, Taiwan, Republic of China
| | - Shih-Ho Lin
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei, 10617, Taiwan, Republic of China
| | - Shan-Hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei, 10617, Taiwan, Republic of China.
- Research and Development Center for Medical Devices, National Taiwan University, Taipei, Taiwan.
- Institute of Cellular and System Medicine, National Health Research Institutes, No. 35 Keyan Road, Miaoli, 35053, Taiwan, Republic of China.
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Oh CR, Lee DI, Park JH, Lee DS. Thermally Healable and Recyclable Graphene-Nanoplate/Epoxy Composites Via an In-Situ Diels-Alder Reaction on the Graphene-Nanoplate Surface. Polymers (Basel) 2019; 11:E1057. [PMID: 31216683 PMCID: PMC6630711 DOI: 10.3390/polym11061057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/14/2019] [Accepted: 06/14/2019] [Indexed: 12/13/2022] Open
Abstract
In this work, thermally healable graphene-nanoplate/epoxy (GNP/EP) nanocomposites were investigated. GNPs were used as reinforcement and crosslinking platforms for the diglycidyl ether of bisphenol A-based epoxy resin (DGEBA) through the Diels-Alder (DA) reaction with furfurylamine (FA). The GNPs and FA could then be used as a derivative of diene and dienophile in the DA reaction. It was expected that the combination of GNPs and FA in DGEBA would produce composites based on the interfacial properties of the components. We confirmed the DA reaction of GNPs and FA at the interface during curing of the GNP/EP nanocomposites. This procedure is simple and solvent-free. DA and retro DA reactions of the obtained composites were demonstrated, and the thermal healing properties were evaluated. The behavior of the GNP/EP nanocomposites in the DA reaction is similar to that of thermosetting polymers at low temperatures due to crosslinking by the DA reaction, and the nanocomposites can be recycled by a retro DA reaction at high temperatures.
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Affiliation(s)
- Cho-Rong Oh
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Baekjedaero 567, Jeonju 54896, Korea.
| | - Dae-Il Lee
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Baekjedaero 567, Jeonju 54896, Korea.
| | - Jun-Hong Park
- R & D Center, Lotte Advanced Materials, Sandan-ro 334-27, Yeosu 59616, Korea.
| | - Dai-Soo Lee
- Division of Semiconductor and Chemical Engineering, Chonbuk National University, Baekjedaero 567, Jeonju 54896, Korea.
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