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Zhang Z, Yang X, Zhao Y, Ye F, Shang L. Liquid Crystal Materials for Biomedical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2300220. [PMID: 37235719 DOI: 10.1002/adma.202300220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/04/2023] [Indexed: 05/28/2023]
Abstract
Liquid crystal is a state of matter being intermediate between solid and liquid. Liquid crystal materials exhibit both orientational order and fluidity. While liquid crystals have long been highly recognized in the display industry, in recent decades, liquid crystals provide new opportunities into the cross-field of material science and biomedicine due to their biocompatibility, multifunctionality, and responsiveness. In this review, the latest achievements of liquid crystal materials applied in biomedical fields are summarized. The start is made by introducing the basic concepts of liquid crystals, and then shifting to the components of liquid crystals as well as functional materials derived therefrom. After that, the ongoing and foreseeable applications of liquid crystal materials in the biomedical field with emphasis put on several cutting-edge aspects, including drug delivery, bioimaging, tissue engineering, implantable devices, biosensing, and wearable devices are discussed. It is hoped that this review will stimulate ingenious ideas for the future generation of liquid crystal-based drug development, artificial implants, disease diagnosis, health status monitoring, and beyond.
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Affiliation(s)
- Zhuohao Zhang
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, and the Shanghai Key Laboratory of Medical Epigenetics, the International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Xinyuan Yang
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, and the Shanghai Key Laboratory of Medical Epigenetics, the International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Yuanjin Zhao
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, and the Shanghai Key Laboratory of Medical Epigenetics, the International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering Southeast University, Nanjing, 210096, China
| | - Fangfu Ye
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang, 325001, China
| | - Luoran Shang
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, and the Shanghai Key Laboratory of Medical Epigenetics, the International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering Southeast University, Nanjing, 210096, China
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Lin Z, Zhong YH, Zhong L, Ye X, Chung LH, Hu X, Xu Z, Yu L, He J. Minimalist Design for Solar Energy Conversion: Revamping the π-Grid of an Organic Framework into Open-Shell Superabsorbers. JACS AU 2023; 3:1711-1722. [PMID: 37388679 PMCID: PMC10302748 DOI: 10.1021/jacsau.3c00132] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/23/2023] [Accepted: 05/23/2023] [Indexed: 07/01/2023]
Abstract
We apply a versatile reaction to a versatile solid: the former involves the electron-deficient alkene tetracyanoethylene (TCNE) as the guest reactant; the latter consists of stacked 2D honeycomb covalent networks based on the electron-rich β-ketoenamine hinges that also activate the conjugated, connecting alkyne units. The TCNE/alkyne reaction is a [2 + 2] cycloaddition-retroelectrocyclization (CA-RE) that forms strong push-pull units directly into the backbone of the framework-i.e., using only the minimalist "bare-bones" scaffold, without the need for additional side groups of alkynes or other functions. The ability of the stacked alkyne units (i.e., as part of the honeycomb mass) to undergo such extensive rearrangement highlights the structural flexibility of these covalent organic framework (COF) hosts. The COF solids remain porous, crystalline, and air-/water-stable after the CA-RE modification, while the resulting push-pull units feature distinct open-shell/free-radical character, are strongly light-absorbing, and shift the absorption ends from 590 nm to around 1900 nm (band gaps from 2.17-2.23 to 0.87-0.95 eV), so as to better capture sunlight (especially the infrared region which takes up 52% of the solar energy). As a result, the modified COF materials achieve the highest photothermal conversion performances, holding promise in thermoelectric power generation and solar steam generation (e.g., with solar-vapor conversion efficiencies >96%).
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Affiliation(s)
- Zhiqing Lin
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Yuan-Hui Zhong
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Leheng Zhong
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Xinhe Ye
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Lai-Hon Chung
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Xuanhe Hu
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhengtao Xu
- Institute
of Materials Research and Engineering (IMRE), Agency for Science,
Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Lin Yu
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Jun He
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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Trinh TE, Ku K, Yeo H. Reprocessable and Chemically Recyclable Hard Vitrimers Based on Liquid-Crystalline Epoxides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209912. [PMID: 36563334 DOI: 10.1002/adma.202209912] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/13/2022] [Indexed: 06/17/2023]
Abstract
The rapid increase in demand for recyclable and reusable thermosets has necessitated the development of materials with chemical structures that exhibit these features. Thus, functional mesogenic epoxide monomers bearing both ester and imine groups that can be vitrimerized and recycled are reported herein. The compounds show mesophase characteristics at 100-200 °C and can be converted into hard epoxides by a common curing reaction. The obtained hard epoxides have high isotropic thermal conductivity (≈0.64 W m-1 K-1 ), which is derived from their highly ordered microstructures. The cured products can be easily reprocessed through imine metathesis and transesterification, and decomposed products can be obtained through imine hydrolysis under acidic or basic conditions and subsequently be re-cured. Surprisingly, recycled materials can be repeatedly reprocessed or chemically decomposed. The reprocessed materials retain the properties of their pristine counterparts, and the recycled products preserve the advantages of the hard thermosets without alteration to any of their unique properties. A dehydration reaction occurs between the residual hydroxyl groups during the re-hardening, which dramatically increases the glass transition temperature by ≈60 °C. These reprocessable and recyclable vitrimers demonstrate the effectiveness and environmental friendliness of the molecular design strategy reported herein.
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Affiliation(s)
- Thi En Trinh
- Department of Science Education, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Kyosun Ku
- Department of Chemistry Education, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Hyeonuk Yeo
- Department of Chemistry Education & Department of Science Education & Department of Pharmacy, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
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Jeon D, Yoon Y, Kim D, Lee G, Ahn SK, Choi D, Kim CB. Fully Recyclable Covalent Adaptable Network Composite with Segregated Hexagonal Boron Nitride Structure for Efficient Heat Dissipation. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c01927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Dupyo Jeon
- School of Chemical Engineering, Pusan National University, Busan46241, Republic of Korea
| | - Yeomyung Yoon
- School of Chemical Engineering, Pusan National University, Busan46241, Republic of Korea
| | - Doyeon Kim
- Department of Chemical Engineering, Myongji University, Yongin17058, Republic of Korea
| | - Gyuri Lee
- School of Chemical Engineering, Pusan National University, Busan46241, Republic of Korea
| | - Suk-kyun Ahn
- School of Chemical Engineering, Pusan National University, Busan46241, Republic of Korea
- Department of Polymer Science and Engineering, Pusan National University, Busan46241, Republic of Korea
| | - Dalsu Choi
- Department of Chemical Engineering, Myongji University, Yongin17058, Republic of Korea
| | - Chae Bin Kim
- School of Chemical Engineering, Pusan National University, Busan46241, Republic of Korea
- Department of Polymer Science and Engineering, Pusan National University, Busan46241, Republic of Korea
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Dang J, Zhang J, Li M, Dang L, Gu J. Enhancing intrinsic thermal conductivities of epoxy resins by introducing biphenyl mesogen-containing liquid crystalline co-curing agents. Polym Chem 2022. [DOI: 10.1039/d2py01157c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Epoxy resins were prepared with an enhanced intrinsic thermal conductivity of 0.42 W (m K)−1 using a biphenyl mesogen-containing co-curing agent.
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Affiliation(s)
- Jinjin Dang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, P. R. China
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Junliang Zhang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, P. R. China
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Mukun Li
- Queen Mary University of London Engineering School, NPU, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Lin Dang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, P. R. China
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Junwei Gu
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, P. R. China
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
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