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Chen H, Zhou J, Cao H, Liang D, Chen L, Yang Y, Wang L, Xie J, Duan H, Fu Y. Thermo-responsive and phase-separated hydrogels for cardiac arrhythmia diagnosis with deep learning algorithms. Biosens Bioelectron 2025; 276:117262. [PMID: 39965416 DOI: 10.1016/j.bios.2025.117262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2024] [Revised: 02/11/2025] [Accepted: 02/13/2025] [Indexed: 02/20/2025]
Abstract
Adhesive epidermal hydrogel electrodes are essential for achieving robust signal transduction and cardiac arrhythmia diagnosis, but detachment of conventional adhesive dressings easily causes secondary damage to delicate wound tissues due to lack of programmable capability of changed adhesion. Herein, we developed hydrogel-based skin-interfacing electrodes capable of on-demand programmable adhesion and detachment to capture electrocardiogram signals for diagnosing cardiac arrhythmia. This was achieved by integrating dynamic multiscale contact and coordinated regulation through temperature-mediated switchable hydrogen bond interactions in phase-separated smart hydrogels. Through micro-scale regulation of adhesive molecules and meso-scale modulation of the modulus, the hydrogel electrodes can be rapidly transited between a slippery state (adhesion ∼1.3 N/m) and a sticky one (adhesion ∼110 N/m) during its peeling from skin. This achieves an 84.5-fold increase of on/off adhesive energy (or reducing the adhesion at the skin interface by 98%) at low temperatures compared to normal skin temperature. A real-time cloud platform was developed by integrating hydrogel electrodes, enabling remote electrocardiogram (ECG) monitoring. For clinical applications, such developed skin sensing platform effectively captured cardiac activities in patients with eight common arrhythmias, achieving by the recorded high-fidelity and analyzable electrical signals. With the assistance of deep learning algorithms, we demonstrated a wearable cardiac arrhythmia intelligent diagnosis system which enables real-time conversion of the collected ECG data into diagnostic evaluations with a recognition accuracy of 98.5%.
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Affiliation(s)
- Hui Chen
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China
| | - Jian Zhou
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China.
| | - Huan Cao
- Nursing Department, Third Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Dongfang Liang
- Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom
| | - Lei Chen
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China
| | - Yuanfan Yang
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China
| | - Lu Wang
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China
| | - Jianfei Xie
- Nursing Department, Third Xiangya Hospital, Central South University, Changsha, 410013, China.
| | - Huigao Duan
- College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China.
| | - Yongqing Fu
- Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom
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2
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Beaudoin G, Herrero A, Pellerin C, Zhu XX. Thermoresponsive Behaviors of Poly( N-methacryloyl glycinamide) and Poly( N-acryloyl glycinamide): Effect of Methacrylation. J Phys Chem B 2025; 129:4514-4522. [PMID: 40296680 DOI: 10.1021/acs.jpcb.5c00037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2025]
Abstract
Poly(N-acryloyl glycinamide) (PNAGA) proves to be an interesting and useful polymer with an upper critical solution temperature (UCST) behavior in water due to intra- and intermolecular hydrogen bonding. Its methacrylamide counterpart, poly(N-methylacryloyl glycinamide) (PNMAGA), has a different UCST behavior, which is easier to dissolve in water. In this work, PNMAGA and PNAGA were synthesized by RAFT polymerization and free radical polymerization, and their solution properties in dilute aqueous media have been studied and compared in detail to elucidate the effects of temperature, polymer concentration, molecular weight, and chain end. The direct comparison provides a better understanding of the UCST behaviors. The presence of an extra methyl group on the repeating unit helps the polymer to dissolve better and eliminates the need for special thermal treatment to obtain a complete dissolution. Infrared spectroscopy and X-ray diffraction analysis show variation in hydrogen bonds between the two polymers and their respective monomers, providing insights into the structural origin of their different solution properties.
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Affiliation(s)
- Guillaume Beaudoin
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Adrien Herrero
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - Christian Pellerin
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada
| | - X X Zhu
- Department of Chemistry, Beijing Normal University, Zhuhai, Guangdong 519085, China
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3
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Rando G, Scalone E, Sfameni S, Plutino MR. Functional Bio-Based Polymeric Hydrogels for Wastewater Treatment: From Remediation to Sensing Applications. Gels 2024; 10:498. [PMID: 39195027 DOI: 10.3390/gels10080498] [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: 07/01/2024] [Revised: 07/23/2024] [Accepted: 07/25/2024] [Indexed: 08/29/2024] Open
Abstract
In recent years, many researchers have focused on designing hydrogels with specific functional groups that exhibit high affinity for various contaminants, such as heavy metals, organic pollutants, pathogens, or nutrients, or environmental parameters. Novel approaches, including cross-linking strategies and the use of nanomaterials, have been employed to enhance the structural integrity and performance of the desired hydrogels. The evolution of these hydrogels is further highlighted, with an emphasis on fine-tuning features, including water absorption capacity, environmental pollutant/factor sensing and selectivity, and recyclability. Furthermore, this review investigates the emerging topic of stimuli-responsive smart hydrogels, underscoring their potential in both sorption and detection of water pollutants. By critically assessing a wide range of studies, this review not only synthesizes existing knowledge, but also identifies advantages and limitations, and describes future research directions in the field of chemically engineered hydrogels for water purification and monitoring with a low environmental impact as an important resource for chemists and multidisciplinary researchers, leading to improvements in sustainable water management technology.
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Affiliation(s)
- Giulia Rando
- Institute for the Study of Nanostructured Materials, ISMN-CNR, URT of Messina, c/o Department of ChiBioFarAm, University of Messina, 98166 Messina, Italy
| | - Elisabetta Scalone
- Institute for the Study of Nanostructured Materials, ISMN-CNR, URT of Messina, c/o Department of ChiBioFarAm, University of Messina, 98166 Messina, Italy
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, 98166 Messina, Italy
| | - Silvia Sfameni
- Institute for the Study of Nanostructured Materials, ISMN-CNR, URT of Messina, c/o Department of ChiBioFarAm, University of Messina, 98166 Messina, Italy
| | - Maria Rosaria Plutino
- Institute for the Study of Nanostructured Materials, ISMN-CNR, URT of Messina, c/o Department of ChiBioFarAm, University of Messina, 98166 Messina, Italy
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Wu B, Si M, Hua L, Zhang D, Li W, Zhao C, Lu W, Chen T. Cephalopod-Inspired Chemical-Gated Hydrogel Actuation Systems for Information 3D-Encoding Display. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2401659. [PMID: 38533903 DOI: 10.1002/adma.202401659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/14/2024] [Indexed: 03/28/2024]
Abstract
Cephalopods evolve the acetylcholine-gated actuation control function of their skin muscles, which enables their dynamic/static multimode display capacities for achieving perfectly spatial control over the colors/patterns on every inch of skin. Reproduction of artificial analogs that exhibit similar multimodal display is essential to reach advanced information three-dimensional (3D) encoding with higher security than the classic 2D-encoding strategy, but remains underdeveloped. The core difficulty is how to replicate such chemical-gated actuation control function into artificial soft actuating systems. Herein, this work proposes to develop azobenzene-functionalized poly(acrylamide) (PAAm) hydrogel systems, whose upper critical solution temperature (UCST) type actuation responsiveness can be intelligently programmed or even gated by the addition of hydrophilic α-cyclodextrin (α-CD) molecules for reversible association with pendant azobenzene moieties via supramolecular host-guest interactions. By employing such α-CD-gated hydrogel actuator as an analogue of cephalopods' skin muscle, biomimetic mechanically modulated multicolor fluorescent display systems are designed, which demonstrate a conceptually new α-CD-gated "thermal stimulation-hydrogel actuation-fluorescence output" display mechanism. Consequently, high-security 3D-encoding information carriers with an unprecedented combination of single-input multiple-output, dynamic/static dual-mode and spatially controlled display capacities are achieved. This bioinspired strategy brings functional-integrated features for artificial display systems and opens previously unidentified avenues for information security.
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Affiliation(s)
- Baoyi Wu
- Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
| | - Muqing Si
- Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
| | - Luqin Hua
- School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Dong Zhang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Wanning Li
- Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
| | - Chuanzhuang Zhao
- School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Wei Lu
- Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
| | - Tao Chen
- Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China
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Li J, Mu X, Zhou J, Zhu S, Gao Y, Wang X, Chen JL, Miao L. Mussel-Inspired Self-Adhesive and Tough Hydrogels for Effectively Cooling Solar Cells and Thermoelectric Generators. ACS APPLIED MATERIALS & INTERFACES 2024; 16:18898-18907. [PMID: 38588524 DOI: 10.1021/acsami.4c00710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Adhesive hydrogel-based evaporative cooling, which necessitates no electricity input, holds promise for reducing energy consumption in thermal management. Herein, inspired by the surface attachment of mussel adhesive proteins via abundant dynamic covalent bonds and noncovalent interactions, we propose a facile strategy to fabricate a self-adhesive cooling hydrogel (Li-AA-TA-PAM) using a copolymer of acrylamide (AM) and acrylic acid (AA) as the primary framework. The monomers formed hydrogen bonds between their carboxyl and amide groups, while tannic acid (TA), rich in catechol groups, enhances the adhesion of the hydrogel through hydrogen bonding. The hydrogel demonstrated strong adhesion to various material surfaces, including plastic, ceramic, glass, and metal. Even under high-speed rotation, it still maintains robust adhesion. The adhesion strength of the Li-AA-TA-PAM hydrogel to aluminum foil reached an impressive value of 296.875 kPa. Interestingly, the excellent contact caused by robust adhesion accelerates heat transfer, resulting in a rapid cooling performance, which mimics the perspiration of mammals. Lithium bromide (LiBr) with hydroactively sorptive sites is introduced to enhance sorption kinetics, thereby extending the effective cooling period. Consequently, the operation temperature of commercial polycrystalline silicon solar cells was reduced by 16 °C under an illumination of 1 kW m-2, and the corresponding efficiency of energy conversion was increased by 1.14%, thereby enhancing the output properties and life span of solar cells. The strategy demonstrates the potential for refrigeration applications using viscous gels.
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Affiliation(s)
- Jialing Li
- Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Xiaojiang Mu
- Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
| | - Jianhua Zhou
- Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Sijing Zhu
- Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Yangfan Gao
- Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Xiaoyang Wang
- Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
| | - Jun-Liang Chen
- Guangxi Key Laboratory of Information Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Lei Miao
- Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
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6
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Nan Y, Zhao C, Beaudoin G, Zhu XX. Synergistic Approaches in the Design and Applications of UCST Polymers. Macromol Rapid Commun 2023; 44:e2300261. [PMID: 37477638 DOI: 10.1002/marc.202300261] [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: 05/06/2023] [Revised: 06/28/2023] [Accepted: 07/11/2023] [Indexed: 07/22/2023]
Abstract
This review summarizes recent progress in the synergistic design strategy for thermoresponsive polymers possessing an upper critical solution temperature (UCST) in aqueous systems. To achieve precise control of the responsive behavior of the UCST polymers, their molecular design can benefit from a synergistic effect of hydrogen bonding with other interactions or modification of the chemical structures. The combination of UCST behavior with other stimuli-responsive properties of the polymers may yield new functional materials with potential applications such as sensors, actuators, and controlled release devices. The advances in this area provide insight or inspiration into the understanding and design of functional UCST polymers for a wide range of applications.
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Affiliation(s)
- Yi Nan
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Chuanzhuang Zhao
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Guillaume Beaudoin
- Département de Chimie, Université de Montréal, C.P. 6128, Succ, Centre-ville, Montréal, QC, H3C 3J7, Canada
| | - X X Zhu
- Département de Chimie, Université de Montréal, C.P. 6128, Succ, Centre-ville, Montréal, QC, H3C 3J7, Canada
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7
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Kaniewska K, Kościelniak P, Karbarz M. pH Modulated Formation of Complexes with Various Stoichiometry between Polymer Network and Fe(III) in Thermosensitive Gels Modified with Gallic Acid. Gels 2023; 9:447. [PMID: 37367118 DOI: 10.3390/gels9060447] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 05/23/2023] [Accepted: 05/27/2023] [Indexed: 06/28/2023] Open
Abstract
Thermoresponsive gels based on N-isopropylacrylamide functionalized with amino groups were modified with gallic acid, with gallate (3,4,5-trihydroxybenzoic) groups being introduced into the polymer network. We investigated how the properties of these gels were affected at varying pH, by the formation of complexes between the polymer network of the gels and Fe3+ ions (which form stable complexes with gallic acid, exhibiting 1:1, 1:2, or 1:3 stoichiometry, depending on pH). The formation of complexes with varying stoichiometry within the gel was confirmed using UV-Vis spectroscopy, and the influence of such complexes on swelling behavior and volume phase transition temperature were investigated. In the appropriate temperature range, complex stoichiometry was found to strongly affect the swelling state. Changes in the pore structure and mechanical properties of the gel caused by the formation of complexes with varying stoichiometry were investigated using scanning electron microscopy and rheological measurements, respectively. The volume changes exhibited by p(NIPA-5%APMA)-Gal-Fe gel were found to be greatest at close to human body temperature (~38 °C). Modification of thermoresponsive pNIPA gel with gallic acid opens new opportunities for the development of pH- and thermosensitive gel materials.
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Affiliation(s)
- Klaudia Kaniewska
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, 1 Pasteura Str., PL-02-093 Warsaw, Poland
| | - Patrycja Kościelniak
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, 1 Pasteura Str., PL-02-093 Warsaw, Poland
| | - Marcin Karbarz
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, 1 Pasteura Str., PL-02-093 Warsaw, Poland
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A Metal Ion and Thermal-Responsive Bilayer Hydrogel Actuator Achieved by the Asymmetric Osmotic Flow of Water between Two Layers under Stimuli. Polymers (Basel) 2022; 14:polym14194019. [PMID: 36235968 PMCID: PMC9570860 DOI: 10.3390/polym14194019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/20/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
Shape-morphing hydrogels have drawn great attention due to their wide applications as soft actuators, while asymmetric responsive shape-morphing behavior upon encountering external stimuli is fundamental for the development of hydrogel actuators. Therefore, in this work, bilayer hydrogels were prepared and the shrinkage ratios (LA/LN) of the AAm/AAc layer to the NIPAM layer immersed in different metal ion solutions, leading to bending in different directions, were investigated. The difference in the shrinkage ratio was attributed to the synergistic effect of the osmolarity difference between the inside and outside of the hydrogels and the interaction difference between the ion and hydrogel polymer chains. Additionally, under thermal stimuli, the hydrogel actuator would bend toward the NIPAM layer due to the shrinkage of the hydrogel networks caused by the hydrophilic–hydrophobic phase transition of NIPAM blocks above the LCST. This indicates that metal ion and thermal-responsive shape-morphing hydrogel actuators with good mechanical properties could be used as metal ion or temperature-controllable switches or other smart devices.
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Zhang XN, Du C, Wang YJ, Hou LX, Du M, Zheng Q, Wu ZL. Influence of the α-Methyl Group on Elastic-To-Glassy Transition of Supramolecular Hydrogels with Hydrogen-Bond Associations. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xin Ning Zhang
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Cong Du
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yan Jie Wang
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Li Xin Hou
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Miao Du
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Qiang Zheng
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zi Liang Wu
- Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Liu YS, Chakravarthy RD, Saddik AA, Mohammed M, Lin HC. Supramolecular polymer/peptide hybrid hydrogels with tunable stiffness mediated by interchain acid-amide hydrogen bonds. RSC Adv 2022; 12:14315-14320. [PMID: 35558843 PMCID: PMC9093129 DOI: 10.1039/d2ra01944b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 04/26/2022] [Indexed: 11/21/2022] Open
Abstract
Hydrogels are a class of biomaterials used in the field of tissue engineering and drug delivery. Many tissue engineering applications depend on the material properties of hydrogel scaffolds, such as mechanical stiffness, pore size, and interconnectivity. In this work, we describe the synthesis of peptide/polymer hybrid double-network (DN) hydrogels composed of supramolecular and covalent polymers. The DN hydrogels were prepared by combining the self-assembled pentafluorobenzyl diphenylalanyl aspartic acid (PFB-FFD) tripeptide for the first network and the polymeric PNIPAM-PEGDA copolymer for the second network. During this process, self-assembled peptide nanostructures are cross-linked to the polyacrylamide group in the polymer network through non-covalent interactions. The PNIPAM-PEGDA:PFB-FFD hydrogel exhibited higher mechanical stiffness (G' ∼2 kPa) than the PNIPAM-PEGDA copolymer. Moreover, PNIPAM-PEGDA:PFB-FFD hydrogel shows a decrease in pore size (∼1.2 μm) compared to the original copolymer (∼5.2 μm), with the structural framework of highly interconnected fibrous peptide network. The mechanical stiffness of hydrogels was systematically investigated by rheological analysis in response to various variables, including UV exposure time, concentration of peptides, and amino acid functionalization. Modulating the time of UV irradiation resulted in PNIPAM-PEGDA:PFB-FFD hydrogels with a four-fold increase in stiffness. The influence of amino acid side chains and terminal charge of peptides on the strength of DN hydrogels was also investigated using pentafluorobenzyl diphenylalanyl lysine (PFB-FFK). Interestingly, PFB-FFK, which has an amine group on the side chain, does not exhibit the DN structures. The mechanical properties and pore sizes of PNIPAM-PEGDA:PFB-FFK hydrogel were very similar to those of the PNIPAM-PEGDA copolymer due to poor cross-linking. The biocompatibility of the hydrogel materials was tested with the hMSC cell line using the MTT method, and the results indicate that the materials are non-toxic and potentially useful for biological applications.
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Affiliation(s)
- Yu-Shen Liu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 300 Taiwan
| | - Rajan Deepan Chakravarthy
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 300 Taiwan
| | - Abdelreheem Abdelfatah Saddik
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 300 Taiwan
- Materials Science and Engineering Laboratory, Department of Chemistry, Faculty of Science, Assiut University Assiut 71516 Egypt
| | - Mohiuddin Mohammed
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 300 Taiwan
| | - Hsin-Chieh Lin
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
- Department of Materials Science and Engineering, National Chiao Tung University Hsinchu 300 Taiwan
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11
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Thermosensitive molecularly imprinted polymer coupled with HPLC for selective enrichment and determination of matrine in traditional Chinese medicine. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1191:123130. [DOI: 10.1016/j.jchromb.2022.123130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/26/2021] [Accepted: 01/15/2022] [Indexed: 11/18/2022]
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12
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Dey S, Roy A, Manna K, Pal S. The UCST phase transition of a dextran based copolymer in aqueous media with tunable thermoresponsive behavior. Polym Chem 2022. [DOI: 10.1039/d2py00626j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hydrogen bonded UCST polymer has been developed by grafting of methacrylamide and acrylic acid on dextran via free radical polymerization.
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Affiliation(s)
- Shaon Dey
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad-826004, India
| | - Arpita Roy
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad-826004, India
| | - Kalipada Manna
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad-826004, India
| | - Sagar Pal
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad-826004, India
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13
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Lan H, Liu Y, Mao Y, Han J, Wang Y, Wang Y, Wang L. Rational design of hydrogen bonds for driving thermo-responsive phase transition and assembly behavior of block copolymer in water. Polym Chem 2022. [DOI: 10.1039/d1py01578h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen bonding interactions were intensified in the present study by adjusting the chain architectures, which provided a sufficient driving force for UCST phase transition in pure water.
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Affiliation(s)
- Huiling Lan
- School of Chemistry and Chemical Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Yuanyuan Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Yanli Mao
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Henan University of Urban Construction, 467036 Pingdingshan, China
| | - Juan Han
- School of Food and Biological Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Yu Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Yun Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, 212013 Zhenjiang, China
| | - Lei Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, 212013 Zhenjiang, China
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