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Liang X, Zhang M, Chong CM, Lin D, Chen S, Zhen Y, Ding H, Zhong HJ. Recent Advances in the 3D Printing of Conductive Hydrogels for Sensor Applications: A Review. Polymers (Basel) 2024; 16:2131. [PMID: 39125157 PMCID: PMC11314299 DOI: 10.3390/polym16152131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 07/21/2024] [Accepted: 07/24/2024] [Indexed: 08/12/2024] Open
Abstract
Conductive hydrogels, known for their flexibility, biocompatibility, and conductivity, have found extensive applications in fields such as healthcare, environmental monitoring, and soft robotics. Recent advancements in 3D printing technologies have transformed the fabrication of conductive hydrogels, creating new opportunities for sensing applications. This review provides a comprehensive overview of the advancements in the fabrication and application of 3D-printed conductive hydrogel sensors. First, the basic principles and fabrication techniques of conductive hydrogels are briefly reviewed. We then explore various 3D printing methods for conductive hydrogels, discussing their respective strengths and limitations. The review also summarizes the applications of 3D-printed conductive hydrogel-based sensors. In addition, perspectives on 3D-printed conductive hydrogel sensors are highlighted. This review aims to equip researchers and engineers with insights into the current landscape of 3D-printed conductive hydrogel sensors and to inspire future innovations in this promising field.
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Affiliation(s)
- Xiaoxu Liang
- Foundation Department, Guangzhou Maritime University, Guangzhou 510725, China; (X.L.); (M.Z.)
| | - Minghui Zhang
- Foundation Department, Guangzhou Maritime University, Guangzhou 510725, China; (X.L.); (M.Z.)
| | - Cheong-Meng Chong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao 999078, China;
| | - Danlei Lin
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; (D.L.); (S.C.); (Y.Z.)
| | - Shiji Chen
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; (D.L.); (S.C.); (Y.Z.)
| | - Yumiao Zhen
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; (D.L.); (S.C.); (Y.Z.)
| | - Hongyao Ding
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Hai-Jing Zhong
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; (D.L.); (S.C.); (Y.Z.)
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Wang J, Qi Y, Gui Y, Wang C, Wu Y, Yao J, Wang J. Ultrastretchable E-Skin Based on Conductive Hydrogel Microfibers for Wearable Sensors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305951. [PMID: 37817356 DOI: 10.1002/smll.202305951] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 09/28/2023] [Indexed: 10/12/2023]
Abstract
Conductive microfibers play a significant role in the flexibility, stretchability, and conductivity of electronic skin (e-skin). Currently, the fabrication of conductive microfibers suffers from either time-consuming and complex operations or is limited in complex fabrication environments. Thus, it presents a one-step method to prepare conductive hydrogel microfibers based on microfluidics for the construction of ultrastretchable e-skin. The microfibers are achieved with conductive MXene cores and hydrogel shells, which are solidified with the covalent cross-linking between sodium alginate and calcium chloride, and mechanically enhanced by the complexation reaction of poly(vinyl alcohol) and sodium hydroxide. The microfiber conductivities are tailorable by adjusting the flow rate and concentration of core and shell fluids, which is essential to more practical applications in complex scenarios. More importantly, patterned e-skin based on conductive hydrogel microfibers can be constructed by combining microfluidics with 3D printing technology. Because of the great advantages in mechanical and electrical performance of the microfibers, the achieved e-skin shows impressive stretching and sensitivity, which also demonstrate attractive application values in motion monitoring and gesture recognition. These characteristics indicate that the ultrastretchable e-skin based on conductive hydrogel microfibers has great potential for applications in health monitoring, wearable devices, and smart medicine.
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Affiliation(s)
- Jinpeng Wang
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
| | - Yongkang Qi
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
| | - Yuhan Gui
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
| | - Can Wang
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
| | - Yikai Wu
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
| | - Jiandong Yao
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
| | - Jie Wang
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing, 210031, China
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Wei L, Wang S, Shan M, Li Y, Wang Y, Wang F, Wang L, Mao J. Conductive fibers for biomedical applications. Bioact Mater 2023; 22:343-364. [PMID: 36311045 PMCID: PMC9588989 DOI: 10.1016/j.bioactmat.2022.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/12/2022] [Accepted: 10/07/2022] [Indexed: 11/26/2022] Open
Abstract
Bioelectricity has been stated as a key factor in regulating cell activity and tissue function in electroactive tissues. Thus, various biomedical electronic constructs have been developed to interfere with cell behaviors to promote tissue regeneration, or to interface with cells or tissue/organ surfaces to acquire physiological status via electrical signals. Benefiting from the outstanding advantages of flexibility, structural diversity, customizable mechanical properties, and tunable distribution of conductive components, conductive fibers are able to avoid the damage-inducing mechanical mismatch between the construct and the biological environment, in return to ensure stable functioning of such constructs during physiological deformation. Herein, this review starts by presenting current fabrication technologies of conductive fibers including wet spinning, microfluidic spinning, electrospinning and 3D printing as well as surface modification on fibers and fiber assemblies. To provide an update on the biomedical applications of conductive fibers and fiber assemblies, we further elaborate conductive fibrous constructs utilized in tissue engineering and regeneration, implantable healthcare bioelectronics, and wearable healthcare bioelectronics. To conclude, current challenges and future perspectives of biomedical electronic constructs built by conductive fibers are discussed.
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Affiliation(s)
- Leqian Wei
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
| | - Shasha Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
| | - Mengqi Shan
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
| | - Yimeng Li
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
| | - Yongliang Wang
- School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao City, Shandong Province, 266071, China
| | - Fujun Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
| | - Lu Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
| | - Jifu Mao
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology, Donghua University, Shanghai, 201620, China
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Qiu L, Kong B, Kong T, Wang H. Recent advances in liver-on-chips: Design, fabrication, and applications. SMART MEDICINE 2023; 2:e20220010. [PMID: 39188562 PMCID: PMC11235950 DOI: 10.1002/smmd.20220010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 10/20/2022] [Indexed: 08/28/2024]
Abstract
The liver is a multifunctional organ and the metabolic center of the human body. Most drugs and toxins are metabolized in the liver, resulting in varying degrees of hepatotoxicity. The damage of liver will seriously affect human health, so it is very important to study the prevention and treatment of liver diseases. At present, there are many research studies in this field. However, most of them are based on animal models, which are limited by the time-consuming processes and species difference between human and animals. In recent years, liver-on-chips have emerged and developed rapidly and are expected to replace animal models. Liver-on-chips refer to the use of a small number of liver cells on the chips to simulate the liver microenvironment and ultrastructure in vivo. They hold extensive applications in multiple fields by reproducing the unique physiological functions of the liver in vitro. In this review, we first introduced the physiology and pathology of liver and then described the cell system of liver-on-chips, the chip-based liver models, and the applications of liver-on-chips in liver transplantation, drug screening, and metabolic evaluation. Finally, we discussed the currently encountered challenges and future trends in liver-on-chips.
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Affiliation(s)
- Linjie Qiu
- The Eighth Affiliated HospitalSun Yat‐Sen UniversityShenzhenChina
- School of MedicineSun Yat‐Sen UniversityShenzhenChina
| | - Bin Kong
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingDepartment of Biomedical EngineeringSchool of MedicineShenzhen UniversityShenzhenChina
| | - Tiantian Kong
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound ImagingDepartment of Biomedical EngineeringSchool of MedicineShenzhen UniversityShenzhenChina
| | - Huan Wang
- The Eighth Affiliated HospitalSun Yat‐Sen UniversityShenzhenChina
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Chen K, Liu R, Liu H, Lyu T, Wang Z, Tian Y. Sponge‐inspired multisensory hydrogel. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Kun Chen
- College of Medicine and Biological Information Engineering Northeastern University Shenyang China
| | - Ruonan Liu
- College of Medicine and Biological Information Engineering Northeastern University Shenyang China
| | - He Liu
- College of Medicine and Biological Information Engineering Northeastern University Shenyang China
| | - Tong Lyu
- College of Medicine and Biological Information Engineering Northeastern University Shenyang China
| | - Zhaoyang Wang
- College of Medicine and Biological Information Engineering Northeastern University Shenyang China
| | - Ye Tian
- College of Medicine and Biological Information Engineering Northeastern University Shenyang China
- Foshan Graduate School of Innovation Northeastern University Foshan China
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Wang F, Chen J, Cui X, Liu X, Chang X, Zhu Y. Wearable Ionogel-Based Fibers for Strain Sensors with Ultrawide Linear Response and Temperature Sensors Insensitive to Strain. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30268-30278. [PMID: 35758312 DOI: 10.1021/acsami.2c09001] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fiber-shaped stretchable strain and temperature sensors are highly desirable for wearable electronics due to their excellent flexibility, comfort, air permeability, and easiness to be weaved into fabric. Herein, we prepare a smart ionogel-based fiber composed of thermoplastic polyurethane (TPU) and ionic liquid (IL) by the facile and scalable wet-spinning technique, which can serve as a wearable strain sensor with good linearity (a correlation coefficient of 0.997) in an ultrawide sensing range (up to 700%), ultralow-detection limit (0.05%), fast response (173 ms) and recovery (120 ms), and high reproducibility. Attributed to these outstanding strain sensing performances, the designed TPU/IL ionogel fiber-shaped sensor is able to monitor both subtle physiological activities and large human motions. More interestingly, because of the fast response and high resolution to strain, the fiber-shaped sensor can be sewn into the fabric to secretly encrypt and wirelessly translate message according to the principle of Morse code. More importantly, a wearable strain-insensitive temperature sensor can be obtained from the ionogel fiber if it is designed into an "S" shape, which can effectively eliminate the interference of strain on temperature sense. It is found that the inaccuracy of temperature sense is within 0.15 °C when the sensor is subjected to 30% tensile strain simultaneously. Moreover, this strain-insensitive temperature sensor shows a monotonic temperature response over a wide temperature range (-15 to 100 °C) with an ultrahigh detecting accuracy of 0.1 °C and good reliability, owing to the fast and stable thermal response of IL. This temperature sensor can realize the detection of thermal radiation, proximity, and respiration, exhibiting enormous potential in smart skin, personal healthcare, and wearable electronics. This work proposes a simple but effective strategy to realize the essential strain and temperature sensing capabilities of wearable electronics and smart fabrics without mutual interference.
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Affiliation(s)
- Fei Wang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Jianwen Chen
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Xihua Cui
- China-Australia Institute for Advanced Materials and Manufacturing, Jiaxing University, Jiaxing City, Zhejiang 314001, China
| | - Xining Liu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Xiaohua Chang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
| | - Yutian Zhu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, People's Republic of China
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7
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Construction of polydopamine reduced graphene oxide/sodium carboxymethyl cellulose/polyacrylamide double network conductive hydrogel with high stretchable, pH-sensitive and strain-sensing properties. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128428] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Vetri Buratti V, Sanz de Leon A, Maturi M, Sambri L, Molina SI, Comes Franchini M. Itaconic-Acid-Based Sustainable Poly(ester amide) Resin for Stereolithography. Macromolecules 2022; 55:3087-3095. [PMID: 36820328 PMCID: PMC9937558 DOI: 10.1021/acs.macromol.1c02525] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Material science is recognized as a frontrunner in achieving a sustainable future, owing to its primary reliance upon petroleum-based chemical raw materials. Several efforts are made to implement common renewable feedstocks as an alternative to common fossil resources. For this purpose, additive manufacturing (AM) represents promising and effective know-how for the replacement of high energy- and resource-demanding processes with more environmentally friendly practices. This work presents a novel biobased ink for stereolithography, which has been formulated by mixing a photocurable poly(ester amide) (PEA) obtained from renewable resources with citrate and itaconate cross-linkers and appropriate photopolymerization initiators, terminators, and dyes. The mechanical features and the relative biocompatibility of 3D-printed objects have been carefully studied to evaluate the possible resin implementation in the field of the textile fashion industry.
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Affiliation(s)
- Veronica Vetri Buratti
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Alberto Sanz de Leon
- Departamento
de Ciencia de los Materiales e Ing. Metalúrgica y Química
Inorgánica, IMEYMAT, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, 11510 Puerto Real (Cádiz), Spain
| | - Mirko Maturi
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Letizia Sambri
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Sergio Ignacio Molina
- Departamento
de Ciencia de los Materiales e Ing. Metalúrgica y Química
Inorgánica, IMEYMAT, Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, 11510 Puerto Real (Cádiz), Spain,
| | - Mauro Comes Franchini
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy,
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9
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Wu R, Kim T. Review of microfluidic approaches for fabricating intelligent fiber devices: importance of shape characteristics. LAB ON A CHIP 2021; 21:1217-1240. [PMID: 33710187 DOI: 10.1039/d0lc01208d] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Shape characteristics, which include the physical dimensions (scale), apparent morphology, surface features, and structure, are essential factors of fibrous materials and determine many of their properties. Microfluidic technologies have recently been proposed as an approach for producing one-dimensional (1D) fibers with controllable shape characteristics and particle alignment, which impart specific functionality to the fiber. Moreover, superfine 1D fibers with a high surface area and ordered structure have many potential applications as they can be directly braided or woven into textiles, clothes, and tissues with two- or three-dimensional (2D or 3D) structures. Previous reviews of microfluidic spinning have not focus on the importance of the shape characteristic on fiber performance and their use in intelligent fiber design. Here, the latest achievements in microfluidic approaches for fiber-device fabrication are reviewed considering the underlying preparation principles, shape characteristics, and functionalization of the fibers. Additionally, intelligent fiber devices with shapes tailored by microfluidic approaches are discussed, including 1D sensors and actuators, luminous fibers, and devices for encoding, energy harvesting, water collection, and tissue engineering applications. Finally, recent progress, challenges, and future perspectives of the microfluidic approaches for fiber device fabrication are discussed.
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Affiliation(s)
- Ronghui Wu
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea.
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10
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Zhao D, Liu Y, Liu B, Chen Z, Nian G, Qu S, Yang W. 3D Printing Method for Tough Multifunctional Particle-Based Double-Network Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2021; 13:13714-13723. [PMID: 33720679 DOI: 10.1021/acsami.1c01413] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
3D printing of hydrogels finds widespread applications in biomedicine and engineering. Artificial cartilages and heart valves, tissue regeneration and soft robots, require high mechanical performance of complex structures. Although many tough hydrogels have been developed, complicated synthesis processes hinder their fabrication in 3D printing. Here, a strategy is proposed to formulate hydrogel inks, which can be printed into various strong and tough particle-based double-network (P-DN) hydrogels of arbitrary shapes without any rheological modifiers. These hydrogel inks consist of microgels and a hydrogel precursor. The microgels are individual highly cross-linked networks. They are prepared by swelling dried microparticles in the hydrogel precursor that consists of monomers, initiators, and cross-linkers. Microgels regulate the rheological properties of the hydrogel ink and enable the direct printing. After printing and curing, the precursor forms a sparsely cross-linked network that integrates the microgels, leading to a P-DN hydrogel. The proposed hydrogel inks allow 3D printing of multifunctional hydrogel structures with high mechanical performance and strong adhesion to diverse materials. This strategy will open new avenues to fabricate multifunctional devices in tissue engineering and soft robotics.
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Affiliation(s)
- Donghao Zhao
- 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
| | - Yide 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
| | - 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
| | - Guodong Nian
- 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
| | - Wei Yang
- 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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11
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Lai PC, Yu SS. Cationic Cellulose Nanocrystals-Based Nanocomposite Hydrogels: Achieving 3D Printable Capacitive Sensors with High Transparency and Mechanical Strength. Polymers (Basel) 2021; 13:688. [PMID: 33668913 PMCID: PMC7956583 DOI: 10.3390/polym13050688] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 01/08/2023] Open
Abstract
Hydrogel ionotronics are intriguing soft materials that have been applied in wearable electronics and artificial muscles. These applications often require the hydrogels to be tough, transparent, and 3D printable. Renewable materials like cellulose nanocrystals (CNCs) with tunable surface chemistry provide a means to prepare tough nanocomposite hydrogels. Here, we designed ink for 3D printable sensors with cationic cellulose nanocrystals (CCNCs) and zwitterionic hydrogels. CCNCs were first dispersed in an aqueous solution of monomers to prepare the ink with a reversible physical network. Subsequent photopolymerization and the introduction of Al3+ ion led to strong hydrogels with multiple physical cross-links. When compared to the hydrogels using conventional CNCs, CCNCs formed a stronger physical network in water that greatly reduced the concentration of nanocrystals needed for reinforcing and 3D printing. In addition, the low concentration of nanofillers enhanced the transparency of the hydrogels for wearable electronics. We then assembled the CCNC-reinforced nanocomposite hydrogels with stretchable dielectrics into capacitive sensors for the monitoring of various human activities. 3D printing further enabled a facile design of tactile sensors with enhanced sensitivity. By harnessing the surface chemistry of the nanocrystals, our nanocomposite hydrogels simultaneously achieved good mechanical strength, high transparency, and 3D printability.
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Affiliation(s)
| | - Sheng-Sheng Yu
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101, Taiwan;
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12
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Liu H, Zhang H, Han W, Lin H, Li R, Zhu J, Huang W. 3D Printed Flexible Strain Sensors: From Printing to Devices and Signals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2004782. [PMID: 33448066 DOI: 10.1002/adma.202004782] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/23/2020] [Indexed: 06/12/2023]
Abstract
The revolutionary and pioneering advancements of flexible electronics provide the boundless potential to become one of the leading trends in the exploitation of wearable devices and electronic skin. Working as substantial intermediates for the collection of external mechanical signals, flexible strain sensors that get intensive attention are regarded as indispensable components in flexible integrated electronic systems. Compared with conventional preparation methods including complicated lithography and transfer printing, 3D printing technology is utilized to manufacture various flexible strain sensors owing to the low processing cost, superior fabrication accuracy, and satisfactory production efficiency. Herein, up-to-date flexible strain sensors fabricated via 3D printing are highlighted, focusing on different printing methods based on photocuring and materials extrusion, including Digital Light Processing (DLP), fused deposition modeling (FDM), and direct ink writing (DIW). Sensing mechanisms of 3D printed strain sensors are also discussed. Furthermore, the existing bottlenecks and future prospects are provided for further progressing research.
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Affiliation(s)
- Haodong Liu
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Hongjian Zhang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Wenqi Han
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Huijuan Lin
- Institute of Advanced Materials (IAM), Key Laboratory of Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Ruizi Li
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Jixin Zhu
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
- Institute of Advanced Materials (IAM), Key Laboratory of Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
- Institute of Advanced Materials (IAM), Key Laboratory of Institute of Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
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13
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Wang H, Liu H, Zhang X, Wang Y, Zhao M, Chen W, Qin J. One-Step Generation of Aqueous-Droplet-Filled Hydrogel Fibers as Organoid Carriers Using an All-in-Water Microfluidic System. ACS APPLIED MATERIALS & INTERFACES 2021; 13:3199-3208. [PMID: 33405509 DOI: 10.1021/acsami.0c20434] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hydrogel fibers are promising carriers for biological applications due to their flexible mechanical properties, well-defined spatial distribution, and excellent biocompatibility. In particular, the droplet-filled hydrogel fibers with the controllable dimension and location of droplets display great advantages to enhance the loading capacity of multiple components and biofunctions. In this work, we proposed a new all-in-water microfluidic system that allows for one-step fabrication of aqueous-droplet-filled hydrogel fibers (ADHFs) with unique morphology and tunable configurations. In the system, the aqueous droplets with equidistance are successfully arranged within the alginate calcium fibers, relying on the design of the pump valve cycle and the select of two immiscible liquids with a stable aqueous interface. The architecture of the ADHF can be flexibly controlled by adjusting the three phase flow rates and the valve switch cycle. The produced ADHFs exhibit high controllability, uniformity, biocompatibility, and stability. The established system enabled the formation of functional human islet organoids in situ through encapsulating pancreatic endocrine progenitor cells within microfibers. The generated islet organoids within droplets exhibit high cell viability and islet-specific function of insulin secretion. The proposed approach provides a new way to fabricate multifunctional hydrogel fibers for materials sciences, tissue engineering, and regenerative medicine.
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Affiliation(s)
- Hui Wang
- Division of Biotechnology, CAS Key Laboratory of SSAC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haitao Liu
- Division of Biotechnology, CAS Key Laboratory of SSAC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Zhang
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, Unites States
| | - Yaqing Wang
- Division of Biotechnology, CAS Key Laboratory of SSAC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mengqian Zhao
- Division of Biotechnology, CAS Key Laboratory of SSAC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenwen Chen
- Division of Biotechnology, CAS Key Laboratory of SSAC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianhua Qin
- Division of Biotechnology, CAS Key Laboratory of SSAC, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Institute For Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China
- CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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14
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Song X, Qiu X, Huang X, Tu Y, Zhao Q, Sun R, Zhang L. Waxy rice amylopectin towards stretchable elastic conductive hydrogel for human motion detection. NEW J CHEM 2021. [DOI: 10.1039/d0nj05258b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Dynamic hydrogen-bonding interaction brings waxy rice amylopectin element into polyacrylamide network to elicit a stretchable elastic composite hydrogel for sensing application.
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Affiliation(s)
- Xiaodong Song
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
| | - Xiaxin Qiu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
| | - Xiaowen Huang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
| | - Yaqing Tu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
| | - Qiuhua Zhao
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
| | - Ruyi Sun
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
| | - Lidong Zhang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- People's Republic of China
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15
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Carayon I, Gaubert A, Mousli Y, Philippe B. Electro-responsive hydrogels: macromolecular and supramolecular approaches in the biomedical field. Biomater Sci 2020; 8:5589-5600. [PMID: 32996479 DOI: 10.1039/d0bm01268h] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hydrogels are soft materials of the utmost importance in the biomedical and healthcare fields. Two approaches can be considered to obtain such biomaterials: the macromolecular one and the supramolecular one. In the first, the chemical gel is based on crosslinking while in the second the physical hydrogel is stabilized thanks to noncovalent interactions. Recently, new trends rely on smart devices able to modify their physico-chemical properties under stimulation. Such stimuli-responsive systems can react to internal (i.e. pH, redox potential, enzyme, etc.) or external (i.e. magnetic field, light, electric field, etc.) triggers leading to smart drug release and drug delivery systems, 3D scaffolds or biosensors. Even if some stimuli-responsive biomaterials are currently widely studied, other ones represent a real challenge. Among them, electro-responsive hydrogels, especially obtained via supramolecular approach, are under-developped leaving room for improvement. Indeed, currently known macromolecular electro-responsive systems are reaching some limitations related to their chemical composition, physicochemical properties, mechanical strength, processing technologies, etc. In contrast, the interest for supramolecular hydrogels has risen for the past few years suggesting that they may provide new solutions as electro-responsive soft materials. In this short review, we give a recent non exhaustive survey on macromolecular and supramolecular approaches for electro-responsive hydrogels in the biomedical field.
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Affiliation(s)
- Iga Carayon
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, F-33076 Bordeaux, France.
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16
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Jiang Z, Diggle B, Tan ML, Viktorova J, Bennett CW, Connal LA. Extrusion 3D Printing of Polymeric Materials with Advanced Properties. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001379. [PMID: 32999820 PMCID: PMC7507554 DOI: 10.1002/advs.202001379] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/03/2020] [Indexed: 05/24/2023]
Abstract
3D printing is a rapidly growing technology that has an enormous potential to impact a wide range of industries such as engineering, art, education, medicine, and aerospace. The flexibility in design provided by this technique offers many opportunities for manufacturing sophisticated 3D devices. The most widely utilized method is an extrusion-based solid-freeform fabrication approach, which is an extremely attractive additive manufacturing technology in both academic and industrial research communities. This method is versatile, with the ability to print a range of dimensions, multimaterial, and multifunctional 3D structures. It is also a very affordable technique in prototyping. However, the lack of variety in printable polymers with advanced material properties becomes the main bottleneck in further development of this technology. Herein, a comprehensive review is provided, focusing on material design strategies to achieve or enhance the 3D printability of a range of polymers including thermoplastics, thermosets, hydrogels, and other polymers by extrusion techniques. Moreover, diverse advanced properties exhibited by such printed polymers, such as mechanical strength, conductance, self-healing, as well as other integrated properties are highlighted. Lastly, the stimuli responsiveness of the 3D printed polymeric materials including shape morphing, degradability, and color changing is also discussed.
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Affiliation(s)
- Zhen Jiang
- Research School of ChemistryAustralian National UniversityCanberraACT2601Australia
| | - Broden Diggle
- Research School of ChemistryAustralian National UniversityCanberraACT2601Australia
| | - Ming Li Tan
- Research School of ChemistryAustralian National UniversityCanberraACT2601Australia
| | - Jekaterina Viktorova
- Research School of ChemistryAustralian National UniversityCanberraACT2601Australia
| | | | - Luke A. Connal
- Research School of ChemistryAustralian National UniversityCanberraACT2601Australia
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17
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Liu K, Wei S, Song L, Liu H, Wang T. Conductive Hydrogels-A Novel Material: Recent Advances and Future Perspectives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:7269-7280. [PMID: 32574052 DOI: 10.1021/acs.jafc.0c00642] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A conductive hydrogel is a kind of polymer material having substantial potential applications with various properties, including high toughness, self-recoverability, electrical conductivity, transparency, freezing resistance, stimuli responsiveness, stretchability, self-healing, and strain sensitivity. Herein, according to the current research status of conductive hydrogels, properties of conductive hydrogels, preparation methods of different conductive hydrogels, and their application in different fields, such as sensor and actuator fabrication, biomedicine, and soft electronics, are introduced. Furthermore, the development direction and application prospects of conductive hydrogels are proposed.
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Affiliation(s)
- Kaiquan Liu
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
- Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
| | - Shan Wei
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
- Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
| | - Longxiang Song
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
- Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
| | - Hongling Liu
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
- Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
| | - Tengfei Wang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP), Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
- Key Laboratory of Shandong Microbial Engineering, College of Bioengineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, People's Republic of China
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18
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Yu T, Wang H, Zhang Y, Wang X, Han B. The Delivery of RNA-Interference Therapies Based on Engineered Hydrogels for Bone Tissue Regeneration. Front Bioeng Biotechnol 2020; 8:445. [PMID: 32478058 PMCID: PMC7235334 DOI: 10.3389/fbioe.2020.00445] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 04/17/2020] [Indexed: 12/19/2022] Open
Abstract
RNA interference (RNAi) is an efficient post-transcriptional gene modulation strategy mediated by small interfering RNAs (siRNAs) and microRNAs (miRNAs). Since its discovery, RNAi has been utilized extensively to diagnose and treat diseases at both the cellular and molecular levels. However, the application of RNAi therapies in bone regeneration has not progressed to clinical trials. One of the major challenges for RNAi therapies is the lack of efficient and safe delivery vehicles that can actualize sustained release of RNA molecules at the target bone defect site and in surrounding cells. One promising approach to achieve these requirements is encapsulating RNAi molecules into hydrogels for delivery, which enables the nucleic acids to be delivered as RNA conjugates or within nanoparticles. Herein, we reviewed recent investigations into RNAi therapies for bone regeneration where RNA delivery was performed by hydrogels.
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Affiliation(s)
- Tingting Yu
- National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Hufei Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yunfan Zhang
- National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xing Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Bing Han
- National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
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19
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Ren Y, Feng J. Skin-Inspired Multifunctional Luminescent Hydrogel Containing Layered Rare-Earth Hydroxide with 3D Printability for Human Motion Sensing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:6797-6805. [PMID: 31955579 DOI: 10.1021/acsami.9b17371] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of multifunctional hydrogels is gaining a lot of attention owing to its application in electronic skins, wearable electronics, and soft robotics. In this study, an effective and facile one-step preparation strategy is developed to fabricate a multifunctional nanocomposite hydrogel consisting of sodium alginate/sodium polyacrylate/layered rare-earth hydroxide (LRH), where LRH plays multiple roles as a co-cross-linker and ionic carrier and is also the origin of fluorescence. The obtained LRH-based composite hydrogel exhibits excellent three-dimensional printing performance at room temperature. When exposed to different humidity conditions, the hydrogel exhibits humidity-dependent electromechanical properties. The multiple functions of the resultant hydrogel are easily realized by just relying on the addition of cationic LRH nanoplates. A skinlike motion sensor with transparency is fabricated based on the printed hydrogel and is used to monitor human motion. Owing to the fluorescence characteristics of lanthanide ions (Eu3+ and Tb3+) from LRH, the hydrogel shows highly tunable multicolored photoluminescence by adjusting the LRH constituent. This study reveals that the multifunctional hydrogels have potential for applications in sensing.
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Affiliation(s)
- Yuanyuan Ren
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science , Fudan University , Shanghai 200433 , P. R. China
| | - Jiachun Feng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science , Fudan University , Shanghai 200433 , P. R. China
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20
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Chen J, Wen H, Zhang G, Lei F, Feng Q, Liu Y, Cao X, Dong H. Multifunctional Conductive Hydrogel/Thermochromic Elastomer Hybrid Fibers with a Core-Shell Segmental Configuration for Wearable Strain and Temperature Sensors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:7565-7574. [PMID: 31971764 DOI: 10.1021/acsami.9b20612] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Flexible wearable sensors are emerging as next-generation tools to collect information from the human body and surroundings in a smart, friendly, and real-time manner. A new class of such sensors with various functionality and amenability for the human body is essential for this goal. Unfortunately, the majority of the wearable sensors reported so far in the literature were of a single function (mostly strain sensors) and just a prototype without thinking of continuous mass production. In this paper, we report a series of multifunctional conductive hydrogel/ thermochromic elastomer hybrid fibers with core-shell segmental configuration and their application as flexible wearable strain and temperature sensors to monitor human motion and body/surrounding temperatures. Specifically, a conductive reduced-graphene-oxide-doped poly(2-acrylamido-2-methyl-1-propanesulfonic acid-co-acrylamide (rGO-poly(AMPS-co-AAm)) hydrogel and a thermochromic elastomer containing silicon rubber and thermochromic microcapsules are chosen as strain-sensitive and thermosensitive materials, respectively. A core-shell segmental structure is realized by programming the extrusion of either conductive hydrogel precursor solution or a thermochromic elastomer prepolymer as a core layer via dual-core coaxial wet spinning. Depending on the assembly order and length of the conductive hydrogel and the thermochromic elastomer, the as-prepared hybrid fibers can be used for different purposes, i.e., human-motion monitoring, body or room temperature detection, and color decoration. The strategy described above, i.e., fabrication of core-shell segmental fibers via the wet-spinning method, is especially suitable for mass production in industry and can be further extended to fabricate flexible wearable devices with more components and more functions such as transistors, sensors, displays, and batteries.
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Affiliation(s)
- Jingxuan Chen
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Department of Biomedical Engineering, School of Material Science and Engineering , South China University of Technology , Guangzhou 510006 , China
| | - Hongji Wen
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Key Laboratory of Biomedical Engineering of Guangdong Province , South China University of Technology , Guangzhou 510641 , China
| | - Guoliang Zhang
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- School of Biomedical Science and Engineering , South China University of Technology , Guangzhou 510006 , China
| | - Fan Lei
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Department of Biomedical Engineering, School of Material Science and Engineering , South China University of Technology , Guangzhou 510006 , China
| | - Qi Feng
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Department of Biomedical Engineering, School of Material Science and Engineering , South China University of Technology , Guangzhou 510006 , China
| | - Yang Liu
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Key Laboratory of Biomedical Engineering of Guangdong Province , South China University of Technology , Guangzhou 510641 , China
| | - Xiaodong Cao
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Department of Biomedical Engineering, School of Material Science and Engineering , South China University of Technology , Guangzhou 510006 , China
| | - Hua Dong
- National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR) , Guangzhou 510006 , China
- Department of Biomedical Engineering, School of Material Science and Engineering , South China University of Technology , Guangzhou 510006 , China
- Key Laboratory of Biomedical Engineering of Guangdong Province , South China University of Technology , Guangzhou 510641 , China
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21
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Chao Y, Shum HC. Emerging aqueous two-phase systems: from fundamentals of interfaces to biomedical applications. Chem Soc Rev 2020; 49:114-142. [DOI: 10.1039/c9cs00466a] [Citation(s) in RCA: 138] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review summarizes recent advances of aqueous two-phase systems (ATPSs), particularly their interfaces, with a focus on biomedical applications.
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Affiliation(s)
- Youchuang Chao
- Department of Mechanical Engineering
- The University of Hong Kong
- China
| | - Ho Cheung Shum
- Department of Mechanical Engineering
- The University of Hong Kong
- China
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22
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A review of electro-stimulated gels and their applications: Present state and future perspectives. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109852. [DOI: 10.1016/j.msec.2019.109852] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 05/21/2019] [Accepted: 06/01/2019] [Indexed: 12/20/2022]
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23
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Liu Y, Yang T, Zhang Y, Qu G, Wei S, Liu Z, Kong T. Ultrastretchable and Wireless Bioelectronics Based on All-Hydrogel Microfluidics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902783. [PMID: 31418928 DOI: 10.1002/adma.201902783] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 06/29/2019] [Indexed: 06/10/2023]
Abstract
Hydrogel bioelectronics that can interface biological tissues and flexible electronics is at the core of the growing field of healthcare monitoring, smart drug systems, and wearable and implantable devices. Here, a simple strategy is demonstrated to prototype all-hydrogel bioelectronics with embedded arbitrary conductive networks using tough hydrogels and liquid metal. Due to their excellent stretchability, the resultant all-hydrogel bioelectronics exhibits stable electrochemical properties at large tensile stretch and various modes of deformation. The potential of fabricated all-hydrogel bioelectronics is demonstrated as wearable strain sensors, cardiac patches, and near-field communication (NFC) devices for monitoring various physiological conditions wirelessly. The presented simple platform paves the way of implantable hydrogel electronics for Internet-of-Things and tissue-machine interfacing applications.
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Affiliation(s)
- Yaming Liu
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Tiyun Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Yuyan Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Gang Qu
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Shanshan Wei
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Zhou Liu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518000, China
| | - Tiantian Kong
- Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen, Guangdong, 518000, China
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24
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Walker BW, Lara RP, Mogadam E, Yu CH, Kimball W, Annabi N. Rational Design of Microfabricated Electroconductive Hydrogels for Biomedical Applications. Prog Polym Sci 2019; 92:135-157. [PMID: 32831422 PMCID: PMC7441850 DOI: 10.1016/j.progpolymsci.2019.02.007] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Electroconductive hydrogels (ECHs) are highly hydrated 3D networks generated through the incorporation of conductive polymers, nanoparticles, and other conductive materials into polymeric hydrogels. ECHs combine several advantageous properties of inherently conductive materials with the highly tunable physical and biochemical properties of hydrogels. Recently, the development of biocompatible ECHs has been investigated for various biomedical applications, such as tissue engineering, drug delivery, biosensors, flexible electronics, and other implantable medical devices. Several methods for the synthesis of ECHs have been reported, which include the incorporation of electrically conductive materials such as gold and silver nanoparticles, graphene, and carbon nanotubes, as well as various conductive polymers (CPs), such as polyaniline, polypyrrole, and poly(3,4-ethylenedioxyythiophene) into hydrogel networks. Theses electroconductive composite hydrogels can be used as scaffolds with high swellability, tunable mechanical properties, and the capability to support cell growth both in vitro and in vivo. Furthermore, recent advancements in microfabrication techniques such as three dimensional (3D) bioprinting, micropatterning, and electrospinning have led to the development of ECHs with biomimetic microarchitectures that reproduce the characteristics of the native extracellular matrix (ECM). In addition, smart ECHs with controlled structures and healing properties have also been engineered into devices with prolonged half-lives and increased durability. The combination of sophisticated synthesis chemistries and modern microfabrication techniques have led to engineer smart ECHs with advanced architectures, geometries, and functionalities that are being increasingly used in drug delivery systems, biosensors, tissue engineering, and soft electronics. In this review, we will summarize different strategies to synthesize conductive biomaterials. We will also discuss the advanced microfabrication techniques used to fabricate ECHs with complex 3D architectures, as well as various biomedical applications of microfabricated ECHs.
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Affiliation(s)
- Brian W Walker
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USA
| | - Roberto Portillo Lara
- Department of Chemical Engineering, Northeastern University, Boston, MA, 02115, USA
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Zapopan, JAL, Mexico
| | - Emad Mogadam
- Department of Internal Medicine, Huntington Hospital, Pasadena, CA, 91105, USA
- Department of Internal Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Chu Hsiang Yu
- Department of Chemical Engineering, Northeastern University, Boston, MA, 02115, USA
| | - William Kimball
- Department of Chemical Engineering, Northeastern University, Boston, MA, 02115, USA
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California-Los Angeles, Los Angeles, CA, 90095, USA
- Biomaterials Innovation Research Center, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, Los Angeles, CA, 90095, USA
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25
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Tsai YJ, Wang CM, Chang TS, Sutradhar S, Chang CW, Chen CY, Hsieh CH, Liao WS. Multilayered Ag NP-PEDOT-Paper Composite Device for Human-Machine Interfacing. ACS APPLIED MATERIALS & INTERFACES 2019; 11:10380-10388. [PMID: 30761896 DOI: 10.1021/acsami.8b21390] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Flexible pressure sensors have attracted increasing interest because of their potential applications on wearable sensing devices for human-machine interface connections, but challenges regarding material cost, fabrication robustness, signal transduction, sensitivity improvement, detection range, and operation convenience still need to be overcome. Herein, with a simple, low-cost, and scalable approach, a flexible and wearable pressure-sensing device fabricated by utilizing filter paper as the solid support, poly(3,4-ethylenedioxythiophene) to enhance conductivity, and silver nanoparticles to provide a rougher surface is introduced. Sandwiching and laminating composite material layers with two thermoplastic polypropylene films lead to robust integration of sensing devices, where assembling four layers of composite materials results in the best sensitivity toward applied pressure. This practical pressure-sensing device possessing properties such as high sensitivity of 0.119 kPa-1, high durability of 2000 operation cycles, and an ultralow energy consumption level of 10-5 W is a promising candidate for contriving point-of-care wearable electronic devices and applying it to human-machine interface connections.
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Affiliation(s)
- Yi-Jie Tsai
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Chang-Ming Wang
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Ta-Sheng Chang
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Sanjeeb Sutradhar
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Che-Wei Chang
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Chong-You Chen
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Chia-Han Hsieh
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Wei-Ssu Liao
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
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Modesto-López LB, Pérez-Arjona A, Gañán-Calvo AM. Flow Blurring-Enabled Production of Polymer Filaments from Poly(ethylene oxide) Solutions. ACS OMEGA 2019; 4:2693-2701. [PMID: 31459505 PMCID: PMC6649032 DOI: 10.1021/acsomega.8b02542] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 01/14/2019] [Indexed: 06/10/2023]
Abstract
Flow blurring (FB) atomizers are relatively simple yet robust devices used for the generation of sprays from solutions of a wide range of viscosities. In this work, we have demonstrated that FB devices may also be applied for massive production of liquid filaments from polymeric solutions. They can later be transformed into solid filaments and fibers, leading to the production of so-called fiber mats. The liquid precursors consisted of poly(ethylene oxide) (PEO) solutions of varying molecular weights (105 [100k] to 4 × 106 g/mol [4M]) and concentrations. The FB device was operated in the gas pressure range of 3-6 bar. Except for solutions of PEO 100k, all solutions exhibited a shear thinning behavior. For massive filament production, a threshold polymer concentration (c t) was identified for each molecular weight. Below such concentration, the atomization resulted in droplets (the classical FB functioning mode). Such a threshold value decreased as the PEO molecular weight increased, and it coincides with the polymer coil overlap concentration, c*. The viscoelastic nature of the solutions was also observed to increase with the molecular weight. A 3.2 dependency of the zero-shear rate viscosity on a so-called Bueche parameter was found for filament production, whereas a nearly linear dependency was found for droplet production. In general, the mean diameter of the filaments decreased as they traveled downstream from the atomization point. Furthermore, at a given distance from the atomizer outlet and gas pressure, the mean filament diameter slightly shifted toward larger sizes with increasing PEO molecular weight. The tendency agrees well with the calculated filaments' Deborah number, which increases with PEO molecular weight. The approach presented herein describes a high-throughput and efficient method for the massive production of viscous filaments. These may be transformed into fibers by an on-line drying step.
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Affiliation(s)
- Luis B. Modesto-López
- Department of Aerospace Engineering
and Fluid Mechanics, University of Seville, Camino de los Descubrimientos S/N, 41092 Seville, Spain
| | - Agustín Pérez-Arjona
- Department of Aerospace Engineering
and Fluid Mechanics, University of Seville, Camino de los Descubrimientos S/N, 41092 Seville, Spain
| | - Alfonso M. Gañán-Calvo
- Department of Aerospace Engineering
and Fluid Mechanics, University of Seville, Camino de los Descubrimientos S/N, 41092 Seville, Spain
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Deng X, Ren Y, Hou L, Liu W, Jia Y, Jiang H. Electric Field-Induced Cutting of Hydrogel Microfibers with Precise Length Control for Micromotors and Building Blocks. ACS APPLIED MATERIALS & INTERFACES 2018; 10:40228-40237. [PMID: 30362341 DOI: 10.1021/acsami.8b12597] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Microfiber modules with controllable lengths emerged as novel biomimetic platforms and are significant for many tissue engineering applications. However, accurately controlling the length of microfibers on the scale of millimeter or even micrometer still remains challenging. Here, a novel and scalable strategy to generate microfiber modules with precisely tunable lengths ranging from 100 to 3500 μm via an alternating current (AC) electric field is presented. To control the microfiber length, double-emulsion droplets containing a chelating agent (sodium citrate) as a spacing node are first uniformly embedded in the microfibers in a controllable spatial arrangement. This process is precisely tuned by adjusting the flow rates, thus, tailoring the resulting multicompartmental microfiber structure. Next, an AC voltage signal is used to trigger the electric field-induced cutting process, where the time-averaged electrical force acting on the induced bipolar charge from the Maxwell-Wagner structural polarization mechanism breaks the stress balance at the interfaces, rupturing the double-emulsion droplets, and resulting in the burst release of the encapsulated chelating agents into the hydrogel cavity. The outer hydrogel shell is quickly dissolved by a chemical reaction, cutting the long fiber into a series of microfiber units of given length. Furthermore, adding magnetic nanoparticles endows magnetic functionality with these microfiber modules, which are allowed to serve as micromotors and building blocks. This electro-induced cutting method provides a facile strategy for the fabrication of microfibers with desired lengths, showing considerable promise for various chemical and biological applications.
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Affiliation(s)
| | | | | | - Weiyu Liu
- School of Electronics and Control Engineering , Chang'an University , Middle-Section of Nan'er Huan Road , Xi'an 710064 , P. R. China
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