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Li X, Zhao X, Liu R, Wang H, Wang S, Fan B, Hu C, Wang H. Mussel-inspired PDA@PEDOT nanocomposite hydrogel with excellent mechanical strength, self-adhesive, and self-healing properties for a flexible strain sensor. J Mater Chem B 2024; 12:3092-3102. [PMID: 38445378 DOI: 10.1039/d3tb02748a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
Conductive hydrogel sensors have attracted attention for use in human motion monitoring detection, but integrating excellent biocompatibility, mechanical, self-adhesive, and self-healing properties, and high sensitivity into a hydrogel remains a challenge. In this work, a novel multifunctional conductive particle was designed and added to a polyacrylamide (PAM) matrix to prepare the hydrogel. It is worth noting that with the addition of polydopamine@poly(3,4-ethylenedioxythiophene) (PDA@PEDOT), the PAM/PDA@PEDOT hydrogel (PAPP hydrogel) showed excellent mechanical properties and high adhesion strength on different substrate surfaces. Meanwhile, the PAPP hydrogel shows outstanding self-healing properties, the mechanical properties of PAPP hydrogel broken from the middle recovered 92% tensile strength and 95% elongation at break after 12 h, respectively. Furthermore, assembled as strain wireless sensors, the PAPP sensor displays high sensitivity, where the gauge factor (GF) is 2.82, which can be used to accurately detect human facial micro-expressions and movements. Overall, the PAPP hydrogel with excellent mechanical, self-adhesive, and self-healing properties, and high sensitivity, demonstrated promise for use in wearable devices and bionic skins.
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Affiliation(s)
- Xiaoyi Li
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China.
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Xueshan Zhao
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Ruiqi Liu
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Hui Wang
- West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, P. R. China
| | - Shuang Wang
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China.
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Bing Fan
- Qingdao Research Institute of Sichuan University, Qingdao 266200, P. R. China
| | - Chenggong Hu
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China.
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Haibo Wang
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, 610041, China.
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
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Shi J, Wang S, Wang H, Gu J. Mechanically Tough and Highly Stretchable Hydrogels Based on Polyurethane for Sensitive Strain Sensor. Polymers (Basel) 2023; 15:3902. [PMID: 37835950 PMCID: PMC10575362 DOI: 10.3390/polym15193902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/15/2023] Open
Abstract
Hydrogels with flexible and stretchable properties are ideal for applications in wearable sensors. However, traditional hydrogel-based sensors suffer from high brittleness and low electrical sensitivity. In this case, to solve this dilemma, a macromolecular polyurethane crosslinking agent (PCA) was designed and prepared; after that, PCA and two-dimensional (2D) MXene nanosheets were both introduced into a covalently crosslinked network to enhance the comprehensive mechanical and electrochemical properties of the hydrogels. The macromolecular polyurethane crosslinking agent promotes high-tensile strength and highly stretchable capacity by suitable covalent crosslinking. The optimized hydrogel, which exhibited maximum tensile strength and maximum elongation at break, had results of 1.21 MPa and 644%, respectively. Two-dimensional MXene nanosheets provide hydrogel with high electrical conductivity and strain sensitivity, producing a wearable device for the continuous monitoring of human movements and facial microexpressions. This study demonstrated an efficient structure design strategy for building mechanically tough, highly stretchable, and sensitive dual-mode MXenes-based wearable sensors.
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Affiliation(s)
- Jianyang Shi
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu 610065, China; (J.S.); (H.W.)
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
| | - Shuang Wang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
| | - Haibo Wang
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu 610065, China; (J.S.); (H.W.)
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
| | - Jun Gu
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu 610065, China; (J.S.); (H.W.)
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
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3
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Abouzeid R, Shayan M, Wu T, Gwon J, Kärki TA, Wu Q. Highly Flexible, Self-Bonding, Self-Healing, and Conductive Soft Pressure Sensors Based on Dicarboxylic Cellulose Nanofiber Hydrogels. ACS APPLIED POLYMER MATERIALS 2023; 5:7009-7021. [PMID: 37705714 PMCID: PMC10496109 DOI: 10.1021/acsapm.3c01024] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/24/2023] [Indexed: 09/15/2023]
Abstract
Conductive hydrogels have gained a great deal of interest in the flexible electronics industry because of their remarkable inherent properties. However, a significant challenge remains for balancing hydrogel's conductivity, self-healing, and strength properties. Herein, double network ionic hydrogels were fabricated by concurrently introducing borax into dicarboxylic cellulose nanofiber (DCNFs) and polyacrylamide (PAM) hydrogels. The incorporation of borax provided a superabsorbent feature to the PAM/DCNF hydrogels (without borax) with the equilibrium water absorption rate increased from 552 to 1800% after 42 h. The compressive strength of the prepared hydrogel was 935 kPa compared to 132 kPa for the PAM hydrogel, with high cycling stability (stable after 1000 compression cycles with 50% strain). The hydrogel pressure sensor had a very sensitive response (gauge factor = 1.36) in the strain range from 10 to 80%, which made it possible to detect mechanical motion accurately and reliably. The developed hydrogels with high-performance, environmentally friendly properties are promising for use in future artificial skin and human-machine interface applications.
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Affiliation(s)
- Ragab Abouzeid
- School
of Renewable Natural Resources, Louisiana
State University, AgCenter, Baton Rouge, Louisiana 70803, United States
- Cellulose
and Paper Department, National Research
Centre, 33 Bohouth St.,
Dokki, Giza 12622, Egypt
| | - Mohammad Shayan
- School
of Renewable Natural Resources, Louisiana
State University, AgCenter, Baton Rouge, Louisiana 70803, United States
| | - Tongyao Wu
- Department
of Electrical and Computer Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Jaegyoung Gwon
- Forest
Products Department, National Institute
of Forest Science, 57
Hoegiro, Dongdaemun-gu, Seoul 02455, Korea
| | - Timo A Kärki
- Mechanical
Engineering Department, Lappeenranta−Lahti
University of Technology, Lappeenranta53850 ,Finland
| | - Qinglin Wu
- School
of Renewable Natural Resources, Louisiana
State University, AgCenter, Baton Rouge, Louisiana 70803, United States
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Lei L, Wang H, Jia Q, Tian Y, Wang S. Highly stretchable, supersensitive, and self-adhesive ionohydrogels using waterborne polyurethane micelles as cross-linkers for wireless strain sensors. J Mater Chem B 2023; 11:7478-7489. [PMID: 37455619 DOI: 10.1039/d3tb00495c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Due to the rapid development of multi-functional flexible wearable sensors, the development prospects of ionohydrogels with excellent mechanical properties and high sensitivity are necessary. In this work, a novel waterborne polyurethane (WPU) micelle with reactive groups on the surface has been prepared as a crosslinker and then reacted with polyacrylamide (PAM) to obtain a polyacrylamide-polyurethane/ionic liquid (PAM-WPU/IL) ionohydrogel. With the aid of ion-dipole interaction and crosslinks in the composite, the ionohydrogel exhibited ultrastretchability (up to 2927%), good mechanical resilience, and excellent self-adhesion strength (46.01 kPa). Furthermore, the ionohydrogel was used as a strain sensor for monitoring human movement with high strain sensitivity (gauge factor = 35). It is believed that this study provides a new idea for designing a multifunctional ionohydrogel for use in wearable electronics.
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Affiliation(s)
- Lingling Lei
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, P. R. China
| | - Haibo Wang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, P. R. China
| | - Qihan Jia
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
| | - Yali Tian
- West China School of Nursing/West China Hospital, Sichuan University, Chengdu 610065, P. R. China.
| | - Shuang Wang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, P. R. China.
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, P. R. China
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Insight into Degrading Effects of Two Fungi on Polyurethane Coating Failure in a Simulated Atmospheric Environment. Polymers (Basel) 2023; 15:polym15020328. [PMID: 36679209 PMCID: PMC9866036 DOI: 10.3390/polym15020328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Two different fungi, Talaromyces funiculosus (T. funiculosus) and Phanerochaete chrysosporium (P. chrysosporium), were collected from the Xishuangbanna atmospheric corrosion site and incubated on a polyurethane (PU) coating at 30 °C for two weeks under 95% relative humidity (RH). The biodegrading effects of these fungi on the coating failure were investigated from aspects of metabolism and electrochemistry. The results showed that T. funiculosus contributed more to the degradation of the PU coating failure than P. chrysosporium, and two factors played dominant roles. First, the weight of the T. funiculosus mycelium was nearly 3 times more than that of P. chrysosporium, indicating there was more substrate mycelium of T. funiculosus deep into the coatings to get more nutrition in atmospheric during colonization. Second, T. funiculosus secreted carboxylic acids, such as citric, propanoic, succinic, and tartaric acids, and accelerated the hydrolysis of the ester and urethane bonds in the PU coatings. As a result, the mycelium of T. funiculosus readily penetrated the interface of the coating and substrate resulting in a rapid proliferation. Thus, the |Z|0.01Hz value of the coating decreased to 5.1 × 104 Ω·cm2 after 14 days of colonization by T. funiculosus while the value remained at 7.2 × 107 Ω·cm2 after colonization by P. chrysosporium. These insights suggest that the biodegradation process in simulated atmospheric environments would provide theoretical guidance and directions for the design of antifungal PU coatings.
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Chen C, Zheng N, Wu W, Tang M, Feng W, Zhang W, Li X, Jiang Y, Pang J, Min D, Fu L. Self-Adhesive and Conductive Dual-Network Polyacrylamide Hydrogels Reinforced by Aminated Lignin, Dopamine, and Biomass Carbon Aerogel for Ultrasensitive Pressure Sensor. ACS APPLIED MATERIALS & INTERFACES 2022; 14:54127-54140. [PMID: 36413754 DOI: 10.1021/acsami.2c12914] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Conductive hydrogels have attracted extensive interest owing to its potential in soft robotics, electronic skin, and human monitoring. However, insufficient mechanical properties, lower adhesivity, and unsatisfactory conductivity seriously hinder potential applications in this emerging field. Herein, a highly elastic conductive hydrogel with a combination of favorable mechanical properties, self-adhesiveness, and excellent electrical performance was achieved by the synergistic effect of aminated lignin (AL), polydopamine (PDA), polyacrylamide (PAM) chains, and biomass carbon aerogel (C-SPF). In detail, AL was applied to induce slow oxidative polymerization of DA for preparing the sticky hydrogel containing PDA. Then, C-SPF carbon aerogel was used as a matrix to construct a dual-network structured composite hydrogel by combining with the hydrogels derived from PDA, AL, and PAM. The as-prepared conductive hydrogel displayed excellent mechanical performance, strong adhesive strength, and repeatable adhesivity. The prepared hydrogel-based pressure sensor possessed fast response (0.6 s loading and 0.8 s unloading stress time), high response (maximum RCR = 1.8 × 104), wide working pressure range (from 0 to 240.0 kPa), and excellent durability (stable 500 compression cycles with 30% deformation). In addition, the prepared sensor also displayed ultrahigh sensitivity (170 kPa-1), which was near 4 orders of magnitude higher than the conventional lignin-modified PAM hydrogels. The multiple interactions between hydrogel components and the mechanical properties of hydrogel were also verified by molecular dynamics investigation. Moreover, the excellent cytocompatibility and antibacterial activity of this composite hydrogel ensured high potential in various applications such as human/machine interaction, artificial intelligence, personal healthcare, and wearable devices.
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Affiliation(s)
- Changzhou Chen
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Na Zheng
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Weixin Wu
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Mengqi Tang
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Wenyao Feng
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Wei Zhang
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Xiangyu Li
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Yan Jiang
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Jinhui Pang
- State Key Laboratory Base of Eco-chemical Engineering, Qingdao University of Science & Technology, Qingdao266042, China
| | - Douyong Min
- College of Light Industry and Food Engineering, Guangxi University, Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning530004, China
| | - Lianhua Fu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen518060, China
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7
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Bercea M. Bioinspired Hydrogels as Platforms for Life-Science Applications: Challenges and Opportunities. Polymers (Basel) 2022; 14:polym14122365. [PMID: 35745941 PMCID: PMC9229923 DOI: 10.3390/polym14122365] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 12/13/2022] Open
Abstract
Hydrogels, as interconnected networks (polymer mesh; physically, chemically, or dynamic crosslinked networks) incorporating a high amount of water, present structural characteristics similar to soft natural tissue. They enable the diffusion of different molecules (ions, drugs, and grow factors) and have the ability to take over the action of external factors. Their nature provides a wide variety of raw materials and inspiration for functional soft matter obtained by complex mechanisms and hierarchical self-assembly. Over the last decade, many studies focused on developing innovative and high-performance materials, with new or improved functions, by mimicking biological structures at different length scales. Hydrogels with natural or synthetic origin can be engineered as bulk materials, micro- or nanoparticles, patches, membranes, supramolecular pathways, bio-inks, etc. The specific features of hydrogels make them suitable for a wide variety of applications, including tissue engineering scaffolds (repair/regeneration), wound healing, drug delivery carriers, bio-inks, soft robotics, sensors, actuators, catalysis, food safety, and hygiene products. This review is focused on recent advances in the field of bioinspired hydrogels that can serve as platforms for life-science applications. A brief outlook on the actual trends and future directions is also presented.
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Affiliation(s)
- Maria Bercea
- "Petru Poni" Institute of Macromolecular Chemistry, 700487 Iasi, Romania
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