|
1
|
Ji J, Wu S, Su H, An S, Ruan J, Zeng D. Research progress of PVA conductive hydrogel-based wearable biosensors in sweat detection. Chem Eng Sci 2024; 300:120620. [DOI: 10.1016/j.ces.2024.120620] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2025]
|
|
2
|
Zhang J, Wang Y, Wei Q, Wang Y, Lei M, Li M, Li D, Zhang L, Wu Y. Self-Healing Mechanism and Conductivity of the Hydrogel Flexible Sensors: A Review. Gels 2021; 7:216. [PMID: 34842713 PMCID: PMC8628684 DOI: 10.3390/gels7040216] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 12/19/2022] Open
Abstract
Sensors are devices that can capture changes in environmental parameters and convert them into electrical signals to output, which are widely used in all aspects of life. Flexible sensors, sensors made of flexible materials, not only overcome the limitations of the environment on detection devices but also expand the application of sensors in human health and biomedicine. Conductivity and flexibility are the most important parameters for flexible sensors, and hydrogels are currently considered to be an ideal matrix material due to their excellent flexibility and biocompatibility. In particular, compared with flexible sensors based on elastomers with a high modulus, the hydrogel sensor has better stretchability and can be tightly attached to the surface of objects. However, for hydrogel sensors, a poor mechanical lifetime is always an issue. To address this challenge, a self-healing hydrogel has been proposed. Currently, a large number of studies on the self-healing property have been performed, and numerous exciting results have been obtained, but there are few detailed reviews focusing on the self-healing mechanism and conductivity of hydrogel flexible sensors. This paper presents an overview of self-healing hydrogel flexible sensors, focusing on their self-healing mechanism and conductivity. Moreover, the advantages and disadvantages of different types of sensors have been summarized and discussed. Finally, the key issues and challenges for self-healing flexible sensors are also identified and discussed along with recommendations for the future.
Collapse
Affiliation(s)
- Juan Zhang
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yanen Wang
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Qinghua Wei
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yanmei Wang
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Mingju Lei
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Mingyang Li
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Dinghao Li
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Longyu Zhang
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yu Wu
- Industry Engineering Department, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China; (J.Z.); (Y.W.); (M.L.); (M.L.); (D.L.); (L.Z.); (Y.W.)
- Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China
| |
Collapse
|
|
3
|
Chowdhury N, Solaiman, Roy CK, Firoz SH, Foyez T, Imran AB. Role of Ionic Moieties in Hydrogel Networks to Remove Heavy Metal Ions from Water. ACS OMEGA 2021; 6:836-844. [PMID: 33458534 PMCID: PMC7808157 DOI: 10.1021/acsomega.0c05411] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 12/11/2020] [Indexed: 03/31/2024]
Abstract
A variety of methods for removing heavy metal ions from wastewater have been developed but because of their low efficiency, further production of toxic sludge or other waste materials, high expense, and lengthy procedures, limited progress has been achieved to date. Polymeric hydrogel has been attracting particular attention for the effective removal of heavy metal ions from wastewater. Here, ionogenic polymeric hydrogels were prepared by free-radical copolymerization of a neutral acrylamide (AAm) monomer with an ionic comonomer in the presence of a suitable initiator and a cross-linker. Different types of ionic comonomers such as strongly acidic: 2-acrylamido-2-methylpropane sulfonic acid, weakly acidic: acrylic acid (AAc), and zwitterionic: 2-methacryloyloxy ethyl dimethyl-3-sulfopropyl ammonium hydroxide with varying amounts were incorporated into the poly(AAm) networks to fabricate the hydrogels. The heavy metal ions (Fe3+, Cr3+, and Hg2+) removal capacity of the fabricated hydrogels from an aqueous solution via electrostatic interactions, coordination bond formation, and a diffusion process was compared and contrasted. The poly(AAm) hydrogel containing weakly acidic AAc groups shows excellent removal capacity of heavy metal ions. The release and recovery of heavy metal ions from the hydrogel samples are also impressive. The compressive strength of hydrogels was found to be significantly high after incorporating heavy metal ions that will increase their potential applications in different sectors.
Collapse
Affiliation(s)
- Noman Chowdhury
- Department
of Chemistry, Faculty of Engineering, Bangladesh
University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Solaiman
- Department
of Chemistry, Faculty of Engineering, Bangladesh
University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Chanchal Kumar Roy
- Department
of Chemistry, Faculty of Engineering, Bangladesh
University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Shakhawat H. Firoz
- Department
of Chemistry, Faculty of Engineering, Bangladesh
University of Engineering and Technology, Dhaka 1000, Bangladesh
| | - Tahmina Foyez
- Department
of Pharmaceutical Sciences, School of Health and Life Sciences, North South University, Dhaka 1229, Bangladesh
| | - Abu Bin Imran
- Department
of Chemistry, Faculty of Engineering, Bangladesh
University of Engineering and Technology, Dhaka 1000, Bangladesh
| |
Collapse
|