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Qi J, Chen Z, Jiang P, Hu W, Wang Y, Zhao Z, Cao X, Zhang S, Tao R, Li Y, Fang D. Recent Progress in Active Mechanical Metamaterials and Construction Principles. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2102662. [PMID: 34716676 PMCID: PMC8728820 DOI: 10.1002/advs.202102662] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/31/2021] [Indexed: 05/03/2023]
Abstract
Active mechanical metamaterials (AMMs) (or smart mechanical metamaterials) that combine the configurations of mechanical metamaterials and the active control of stimuli-responsive materials have been widely investigated in recent decades. The elaborate artificial microstructures of mechanical metamaterials and the stimulus response characteristics of smart materials both contribute to AMMs, making them achieve excellent properties beyond the conventional metamaterials. The micro and macro structures of the AMMs are designed based on structural construction principles such as, phase transition, strain mismatch, and mechanical instability. Considering the controllability and efficiency of the stimuli-responsive materials, physical fields such as, the temperature, chemicals, light, electric current, magnetic field, and pressure have been adopted as the external stimuli in practice. In this paper, the frontier works and the latest progress in AMMs from the aspects of the mechanics and materials are reviewed. The functions and engineering applications of the AMMs are also discussed. Finally, existing issues and future perspectives in this field are briefly described. This review is expected to provide the basis and inspiration for the follow-up research on AMMs.
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Affiliation(s)
- Jixiang Qi
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Zihao Chen
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Peng Jiang
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Wenxia Hu
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Yonghuan Wang
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Zeang Zhao
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Xiaofei Cao
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Shushan Zhang
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Ran Tao
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Ying Li
- State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing100081China
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
| | - Daining Fang
- Beijing Key Laboratory of Lightweight Multi‐functional Composite Materials and StructuresInstitute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing100081China
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152
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Cao H, Duan L, Zhang Y, Cao J, Zhang K. Current hydrogel advances in physicochemical and biological response-driven biomedical application diversity. Signal Transduct Target Ther 2021; 6:426. [PMID: 34916490 PMCID: PMC8674418 DOI: 10.1038/s41392-021-00830-x] [Citation(s) in RCA: 431] [Impact Index Per Article: 107.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 02/05/2023] Open
Abstract
Hydrogel is a type of versatile platform with various biomedical applications after rational structure and functional design that leverages on material engineering to modulate its physicochemical properties (e.g., stiffness, pore size, viscoelasticity, microarchitecture, degradability, ligand presentation, stimulus-responsive properties, etc.) and influence cell signaling cascades and fate. In the past few decades, a plethora of pioneering studies have been implemented to explore the cell-hydrogel matrix interactions and figure out the underlying mechanisms, paving the way to the lab-to-clinic translation of hydrogel-based therapies. In this review, we first introduced the physicochemical properties of hydrogels and their fabrication approaches concisely. Subsequently, the comprehensive description and deep discussion were elucidated, wherein the influences of different hydrogels properties on cell behaviors and cellular signaling events were highlighted. These behaviors or events included integrin clustering, focal adhesion (FA) complex accumulation and activation, cytoskeleton rearrangement, protein cyto-nuclei shuttling and activation (e.g., Yes-associated protein (YAP), catenin, etc.), cellular compartment reorganization, gene expression, and further cell biology modulation (e.g., spreading, migration, proliferation, lineage commitment, etc.). Based on them, current in vitro and in vivo hydrogel applications that mainly covered diseases models, various cell delivery protocols for tissue regeneration and disease therapy, smart drug carrier, bioimaging, biosensor, and conductive wearable/implantable biodevices, etc. were further summarized and discussed. More significantly, the clinical translation potential and trials of hydrogels were presented, accompanied with which the remaining challenges and future perspectives in this field were emphasized. Collectively, the comprehensive and deep insights in this review will shed light on the design principles of new biomedical hydrogels to understand and modulate cellular processes, which are available for providing significant indications for future hydrogel design and serving for a broad range of biomedical applications.
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Affiliation(s)
- Huan Cao
- Department of Nuclear Medicine, West China Hospital, and National Engineering Research Center for Biomaterials, Sichuan University, 610064, Chengdu, P. R. China
- Department of Medical Ultrasound and Central Laboratory, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Yan-chang-zhong Road, 200072, Shanghai, People's Republic of China
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Lixia Duan
- Department of Medical Ultrasound and Central Laboratory, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Yan-chang-zhong Road, 200072, Shanghai, People's Republic of China
| | - Yan Zhang
- Department of Medical Ultrasound and Central Laboratory, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Yan-chang-zhong Road, 200072, Shanghai, People's Republic of China
| | - Jun Cao
- Department of Nuclear Medicine, West China Hospital, and National Engineering Research Center for Biomaterials, Sichuan University, 610064, Chengdu, P. R. China.
| | - Kun Zhang
- Department of Medical Ultrasound and Central Laboratory, Shanghai Tenth People's Hospital, Tongji University School of Medicine, No. 301 Yan-chang-zhong Road, 200072, Shanghai, People's Republic of China.
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153
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Zhu H, Hu X, Liu B, Chen Z, Qu S. 3D Printing of Conductive Hydrogel-Elastomer Hybrids for Stretchable Electronics. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59243-59251. [PMID: 34870967 DOI: 10.1021/acsami.1c17526] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Electronically conductive hydrogels integrated with dielectric elastomers show great promise in a wide range of applications, such as biomedical devices, soft robotics, and stretchable electronics. However, one big conundrum that impedes the functionality and performance of hydrogel-elastomer-based devices lies in the strict demands of device integration and the requirements for devices with satisfactory mechanical and electrical properties. Herein, the digital light processing three-dimensional (3D) printing method is used to fabricate 3D functional devices that bridge submillimeter-scale device resolution to centimeter-scale object size and simultaneously realize complex hybrid structures with strong adhesion interfaces and desired functionalities. The interconnected poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) network endows the PAAm hydrogel with high conductivity and superior electrical stability and poly(2-hydroxyethyl acrylate) functions as an insulating medium. The strong interfacial bonding between the hydrogel and elastomer is achieved by incomplete photopolymerization that ensures the stability of the hybrid structure. Lastly, applications of stretchable electronics illustrated as 3D-printed electroluminescent devices and 3D-printed capacitive sensors are conceptually demonstrated. This strategy will open up avenues to fabricate conductive hydrogel-elastomer hybrids in next-generation multifunctional stretchable electronics.
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Affiliation(s)
- Heng Zhu
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
| | - Xiaocheng Hu
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
| | - Binhong Liu
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
| | - Zhe Chen
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
| | - Shaoxing Qu
- State Key Laboratory of Fluid Power & Mechatronic System, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
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154
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Ravanbakhsh H, Karamzadeh V, Bao G, Mongeau L, Juncker D, Zhang YS. Emerging Technologies in Multi-Material Bioprinting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2104730. [PMID: 34596923 PMCID: PMC8971140 DOI: 10.1002/adma.202104730] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/10/2021] [Indexed: 05/09/2023]
Abstract
Bioprinting, within the emerging field of biofabrication, aims at the fabrication of functional biomimetic constructs. Different 3D bioprinting techniques have been adapted to bioprint cell-laden bioinks. However, single-material bioprinting techniques oftentimes fail to reproduce the complex compositions and diversity of native tissues. Multi-material bioprinting as an emerging approach enables the fabrication of heterogeneous multi-cellular constructs that replicate their host microenvironments better than single-material approaches. Here, bioprinting modalities are reviewed, their being adapted to multi-material bioprinting is discussed, and their advantages and challenges, encompassing both custom-designed and commercially available technologies are analyzed. A perspective of how multi-material bioprinting opens up new opportunities for tissue engineering, tissue model engineering, therapeutics development, and personalized medicine is offered.
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Affiliation(s)
- Hossein Ravanbakhsh
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
- Department of Mechanical Engineering, McGill University, Montreal, QC, H3A0C3, Canada
| | - Vahid Karamzadeh
- Department of Biomedical Engineering, McGill University, Montreal, QC, H3A0G1, Canada
| | - Guangyu Bao
- Department of Mechanical Engineering, McGill University, Montreal, QC, H3A0C3, Canada
| | - Luc Mongeau
- Department of Mechanical Engineering, McGill University, Montreal, QC, H3A0C3, Canada
| | - David Juncker
- Department of Biomedical Engineering, McGill University, Montreal, QC, H3A0G1, Canada
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
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155
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Wang H, Zhang B, Zhang J, He X, Liu F, Cui J, Lu Z, Hu G, Yang J, Zhou Z, Wang R, Hou X, Ma L, Ren P, Ge Q, Li P, Huang W. General One-Pot Method for Preparing Highly Water-Soluble and Biocompatible Photoinitiators for Digital Light Processing-Based 3D Printing of Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2021; 13:55507-55516. [PMID: 34767336 DOI: 10.1021/acsami.1c15636] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We report a facile but general method to prepare highly water-soluble and biocompatible photoinitiators for digital light processing (DLP)-based 3D printing of high-resolution hydrogel structures. Through a simple and straightforward one-pot procedure, we can synthesize a metal-phenyl(2,4,6-trimethylbenzoyl)phosphinates (M-TMPP)-based photoinitiator with excellent water solubility (up to ∼50 g/L), which is much higher than that of previously reported water-soluble photoinitiators. The M-TMPP aqueous solutions show excellent biocompatibility, which meets the prerequisite for biomedical applications. Moreover, we used M-TMPP to prepare visible light (405 nm)-curable hydrogel precursor solutions for 3D printing hydrogel structures with a high water content (80 wt %), high resolution (∼7 μm), high deformability (more than 80% compression), and complex geometry. The printed hydrogel structures demonstrate great potential in flexible electronic sensors due to the fast mechanical response and high stability under cyclic loadings.
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Affiliation(s)
- Hui Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Biao Zhang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Jianhong Zhang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Xiangnan He
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Fukang Liu
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Jingjing Cui
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Zhe Lu
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Guang Hu
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian 223003, China
| | - Jun Yang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Zhe Zhou
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Runze Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Xingyu Hou
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Luankexin Ma
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Panyu Ren
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Qi Ge
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Peng Li
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China
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156
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Malekmohammadi S, Sedghi Aminabad N, Sabzi A, Zarebkohan A, Razavi M, Vosough M, Bodaghi M, Maleki H. Smart and Biomimetic 3D and 4D Printed Composite Hydrogels: Opportunities for Different Biomedical Applications. Biomedicines 2021; 9:1537. [PMID: 34829766 PMCID: PMC8615087 DOI: 10.3390/biomedicines9111537] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/10/2021] [Accepted: 10/16/2021] [Indexed: 12/17/2022] Open
Abstract
In recent years, smart/stimuli-responsive hydrogels have drawn tremendous attention for their varied applications, mainly in the biomedical field. These hydrogels are derived from different natural and synthetic polymers but are also composite with various organic and nano-organic fillers. The basic functions of smart hydrogels rely on their ability to change behavior; functions include mechanical, swelling, shaping, hydrophilicity, and bioactivity in response to external stimuli such as temperature, pH, magnetic field, electromagnetic radiation, and biological molecules. Depending on the final applications, smart hydrogels can be processed in different geometries and modalities to meet the complicated situations in biological media, namely, injectable hydrogels (following the sol-gel transition), colloidal nano and microgels, and three dimensional (3D) printed gel constructs. In recent decades smart hydrogels have opened a new horizon for scientists to fabricate biomimetic customized biomaterials for tissue engineering, cancer therapy, wound dressing, soft robotic actuators, and controlled release of bioactive substances/drugs. Remarkably, 4D bioprinting, a newly emerged technology/concept, aims to rationally design 3D patterned biological matrices from synthesized hydrogel-based inks with the ability to change structure under stimuli. This technology has enlarged the applicability of engineered smart hydrogels and hydrogel composites in biomedical fields. This paper aims to review stimuli-responsive hydrogels according to the kinds of external changes and t recent applications in biomedical and 4D bioprinting.
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Affiliation(s)
- Samira Malekmohammadi
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK;
- Department of Regenerative Medicine, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 1665659911, Iran;
- Nanomedicine Research Association (NRA), Universal Scientific Education and Research Network (USERN), Tehran 1419733151, Iran;
| | - Negar Sedghi Aminabad
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz 5166653431, Iran; (N.S.A.); (A.S.)
| | - Amin Sabzi
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz 5166653431, Iran; (N.S.A.); (A.S.)
| | - Amir Zarebkohan
- Nanomedicine Research Association (NRA), Universal Scientific Education and Research Network (USERN), Tehran 1419733151, Iran;
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz 5166653431, Iran; (N.S.A.); (A.S.)
| | - Mehdi Razavi
- Biionix Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, FL 32827, USA;
| | - Massoud Vosough
- Department of Regenerative Medicine, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 1665659911, Iran;
| | - Mahdi Bodaghi
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK;
| | - Hajar Maleki
- Department of Chemistry, Institute of Inorganic Chemistry, University of Cologne, 50939 Cologne, Germany
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157
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Regis JE, Renteria A, Hall SE, Hassan MS, Marquez C, Lin Y. Recent Trends and Innovation in Additive Manufacturing of Soft Functional Materials. MATERIALS (BASEL, SWITZERLAND) 2021; 14:4521. [PMID: 34443043 PMCID: PMC8399226 DOI: 10.3390/ma14164521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 11/16/2022]
Abstract
The growing demand for wearable devices, soft robotics, and tissue engineering in recent years has led to an increased effort in the field of soft materials. With the advent of personalized devices, the one-shape-fits-all manufacturing methods may soon no longer be the standard for the rapidly increasing market of soft devices. Recent findings have pushed technology and materials in the area of additive manufacturing (AM) as an alternative fabrication method for soft functional devices, taking geometrical designs and functionality to greater heights. For this reason, this review aims to highlights recent development and advances in AM processable soft materials with self-healing, shape memory, electronic, chromic or any combination of these functional properties. Furthermore, the influence of AM on the mechanical and physical properties on the functionality of these materials is expanded upon. Additionally, advances in soft devices in the fields of soft robotics, biomaterials, sensors, energy harvesters, and optoelectronics are discussed. Lastly, current challenges in AM for soft functional materials and future trends are discussed.
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Affiliation(s)
- Jaime Eduardo Regis
- Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.); (S.E.H.); (M.S.H.); (C.M.); (Y.L.)
- W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Anabel Renteria
- Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.); (S.E.H.); (M.S.H.); (C.M.); (Y.L.)
- W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Samuel Ernesto Hall
- Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.); (S.E.H.); (M.S.H.); (C.M.); (Y.L.)
- W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Md Sahid Hassan
- Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.); (S.E.H.); (M.S.H.); (C.M.); (Y.L.)
- W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Cory Marquez
- Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.); (S.E.H.); (M.S.H.); (C.M.); (Y.L.)
- W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Yirong Lin
- Department of Mechanical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; (A.R.); (S.E.H.); (M.S.H.); (C.M.); (Y.L.)
- W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA
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158
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Alketbi AS, Shi Y, Li H, Raza A, Zhang T. Impact of PEGDA photopolymerization in micro-stereolithography on 3D printed hydrogel structure and swelling. SOFT MATTER 2021; 17:7188-7195. [PMID: 34269366 DOI: 10.1039/d1sm00483b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
3D printing complex architectures of responsive-hydratable polymers are enabled by stereolithography via photopolymerization. Yet, insufficient crosslinking leads to compromised structural integrity of the photopolymerized samples, which affects the functionality and reliability of hydrogel devices significantly. Here we investigate how curing parameters and ink formulation affect 3D printed PEGDA samples by using a combination of microfabrication, structural characterization, and reactive coarse-grained molecular dynamics simulation. Our findings show that the degree of curing exhibits a graded profile from confocal Raman spectroscopy and submicron pores from atomic force microscopy, both of which are also observed in our molecular simulations. Moreover, with environmental scanning electron microscopy, we probe the microscopic swelling and bending dynamics of 3D printed hydratable PEGDA structures as well as their structural integrity. Our in-depth characterization results reveal how hydrogel elasticity and irreversible densification due to pore formation highly depends on the exposure time, light intensity and the associated degree of crosslinking. This work provides new molecular insights into processing-structure relation in stereolithography 3D printing.
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Affiliation(s)
- Afra S Alketbi
- Department of Mechanical Engineering, Masdar Institute, Khalifa University of Science and Technology, P. O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Yunfeng Shi
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
| | - Hongxia Li
- Department of Mechanical Engineering, Masdar Institute, Khalifa University of Science and Technology, P. O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Aikifa Raza
- Department of Mechanical Engineering, Masdar Institute, Khalifa University of Science and Technology, P. O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - TieJun Zhang
- Department of Mechanical Engineering, Masdar Institute, Khalifa University of Science and Technology, P. O. Box 127788, Abu Dhabi, United Arab Emirates.
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159
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Kam D, Braner A, Abouzglo A, Larush L, Chiappone A, Shoseyov O, Magdassi S. 3D Printing of Cellulose Nanocrystal-Loaded Hydrogels through Rapid Fixation by Photopolymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6451-6458. [PMID: 34008993 DOI: 10.1021/acs.langmuir.1c00553] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
New ink compositions for direct ink writing (DIW) printing of hydrogels, combining superior rheological properties of cellulose nanocrystals (CNCs) and a water-compatible photoinitiator, are presented. Rapid fixation was achieved by photopolymerization induced immediately after the printing of each layer by 365 nm light for 5 s, which overcame the common height limitation in DIW printing of hydrogels, and enabled the fabrication of objects with a high aspect ratio. CNCs imparted a unique rheological behavior, which was expressed by orders of magnitude difference in viscosity between low and high shear rates and in rapid high shear recovery, without compromising ink printability. Compared to the literature, the presented printing compositions enable the use of low photoinitiator concentrations at a very short build time, 6.25 s/mm, and are also curable by 405 nm light, which is favorable for maintaining viability in bioinks.
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Affiliation(s)
- Doron Kam
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
- Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Ariel Braner
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
- Alpha Program, Future Scientist Center, Jerusalem 9190401, Israel
| | - Avi Abouzglo
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Liraz Larush
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Annalisa Chiappone
- Department of Applied Science and Technology, Politecnico di Torino, Torino 10129, Italy
| | - Oded Shoseyov
- Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Shlomo Magdassi
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
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160
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Zhao X, Zhao Y, Li MD, Li Z, Peng H, Xie T, Xie X. Efficient 3D printing via photooxidation of ketocoumarin based photopolymerization. Nat Commun 2021; 12:2873. [PMID: 34001898 PMCID: PMC8129151 DOI: 10.1038/s41467-021-23170-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 04/14/2021] [Indexed: 12/04/2022] Open
Abstract
Photopolymerization-based three-dimensional (3D) printing can enable customized manufacturing that is difficult to achieve through other traditional means. Nevertheless, it remains challenging to achieve efficient 3D printing due to the compromise between print speed and resolution. Herein, we report an efficient 3D printing approach based on the photooxidation of ketocoumarin that functions as the photosensitizer during photopolymerization, which can simultaneously deliver high print speed (5.1 cm h-1) and high print resolution (23 μm) on a common 3D printer. Mechanistically, the initiating radical and deethylated ketocoumarin are both generated upon visible light exposure, with the former giving rise to rapid photopolymerization and high print speed while the latter ensuring high print resolution by confining the light penetration. By comparison, the printed feature is hard to identify when the ketocoumarin encounters photoreduction due to the increased lateral photopolymerization. The proposed approach here provides a viable solution towards efficient additive manufacturing by controlling the photoreaction of photosensitizers during photopolymerization.
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Affiliation(s)
- Xiaoyu Zhao
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, China
- National Anti-Counterfeit Engineering Research Center, HUST, Wuhan, China
| | - Ye Zhao
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, China
- National Anti-Counterfeit Engineering Research Center, HUST, Wuhan, China
| | - Ming-De Li
- Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Department of Chemistry, Shantou University (STU), Shantou, China
| | - Zhong'an Li
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, China
| | - Haiyan Peng
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, China.
- National Anti-Counterfeit Engineering Research Center, HUST, Wuhan, China.
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University (ZJU), Hangzhou, China
| | - Xiaolin Xie
- Key Lab for Material Chemistry of Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, China.
- National Anti-Counterfeit Engineering Research Center, HUST, Wuhan, China.
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161
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Li X, Zhang P, Li Q, Wang H, Yang C. Direct-ink-write printing of hydrogels using dilute inks. iScience 2021; 24:102319. [PMID: 33870134 PMCID: PMC8042399 DOI: 10.1016/j.isci.2021.102319] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/06/2021] [Accepted: 03/14/2021] [Indexed: 01/19/2023] Open
Abstract
Direct-ink-write (DIW) printing has been used in myriad applications. Existing DIW printing relies on inks of specific rheology to compromise with printing process, imposing restrictions on the choice of printable materials. Reported ink viscosity ranges from 10-1 to 103 Pa·s. Here we report a method to enable DIW printing that is compatible with dilute ink (10-3 Pa·s) by manipulating the interactions between ink and substrate. By exemplifying hydrogel printing, we build a printing system and show that dilute ink of appropriate surface energy, once extruded, can spontaneously wet and reside within the region of higher surface energy on a substrate of lower surface energy, while resisting gravity and maintaining shape before solidification. We demonstrate the diversity for printing various materials on various substrates and three deployments immediately enabled by the proposed method. The method expands the range of printable materials for DIW printing and the toolbox for additive manufacturing.
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Affiliation(s)
- Xiaotian Li
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ping Zhang
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qi Li
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Huiru Wang
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Canhui Yang
- Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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162
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Lao Z, Xia N, Wang S, Xu T, Wu X, Zhang L. Tethered and Untethered 3D Microactuators Fabricated by Two-Photon Polymerization: A Review. MICROMACHINES 2021; 12:465. [PMID: 33924199 PMCID: PMC8074609 DOI: 10.3390/mi12040465] [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: 03/14/2021] [Revised: 04/11/2021] [Accepted: 04/16/2021] [Indexed: 12/14/2022]
Abstract
Microactuators, which can transform external stimuli into mechanical motion at microscale, have attracted extensive attention because they can be used to construct microelectromechanical systems (MEMS) and/or microrobots, resulting in extensive applications in a large number of fields such as noninvasive surgery, targeted delivery, and biomedical machines. In contrast to classical 2D MEMS devices, 3D microactuators provide a new platform for the research of stimuli-responsive functional devices. However, traditional planar processing techniques based on photolithography are inadequate in the construction of 3D microstructures. To solve this issue, researchers have proposed many strategies, among which 3D laser printing is becoming a prospective technique to create smart devices at the microscale because of its versatility, adjustability, and flexibility. Here, we review the recent progress in stimulus-responsive 3D microactuators fabricated with 3D laser printing depending on different stimuli. Then, an outlook of the design, fabrication, control, and applications of 3D laser-printed microactuators is propounded with the goal of providing a reference for related research.
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Affiliation(s)
- Zhaoxin Lao
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Sha Tin, Hong Kong 999077, China; (N.X.); (S.W.)
- Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology, Hefei 230009, China
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230022, China
| | - Neng Xia
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Sha Tin, Hong Kong 999077, China; (N.X.); (S.W.)
| | - Shijie Wang
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Sha Tin, Hong Kong 999077, China; (N.X.); (S.W.)
| | - Tiantian Xu
- Guangdong Provincial Key Laboratory of Robotics and Intelligent System, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; (T.X.); (X.W.)
| | - Xinyu Wu
- Guangdong Provincial Key Laboratory of Robotics and Intelligent System, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; (T.X.); (X.W.)
| | - Li Zhang
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Sha Tin, Hong Kong 999077, China; (N.X.); (S.W.)
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