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Yu P, Zhao Y, Li X, Lin H, Song S, Li X, Dong Y. A novel strategy to construct hydrogels with anti-swelling and water-retention abilities by covalent surface modification. SOFT MATTER 2024; 20:6215-6220. [PMID: 39049586 DOI: 10.1039/d4sm00681j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/27/2024]
Abstract
Hydrogels have been widely used in various fields due to their diverse properties and flexible preparation methods. However, limited by the open network structure, hydrogels inevitably lose water in air or absorb water in aqueous solution, resulting in the loss of intrinsic functions, which severely hinders their practical applications. To address this issue, a general strategy was developed by subsequently modifying the surface of hydrogels with branched polyethyleneimine (PEI) and (3-(methacryloxy)propyl)trimethoxysilane (MPS) to covalently construct a dense cross-linked siloxane layer on the hydrogel surface. As a proof of concept, poly(2-(dimethylamino)ethyl methacrylate)/sodium alginate (PDMAEMA/SA) hydrogels were chosen as the model hydrogels to verify the feasibility of this strategy. The hydrogels adsorbed PEI to form amino-rich surfaces through hydrogen bonding, followed by covalently grafting MPS through rapid and catalyst-free mutual chemical reactions between acrylates and amine groups, as well as the hydrolysis of MPS. After modification, robust hydrophobic surfaces were successfully fabricated on the hydrophilic hydrogels. The modified hydrogels exhibited extraordinary anti-swelling and water-retention abilities. As the most typical intrinsic properties of hydrogels, the conductivity and sensing performance were well preserved. The strategy reported here provides a new insight into the construction of hydrogels with anti-swelling and water-retention abilities.
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Affiliation(s)
- Peng Yu
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
| | - Yanru Zhao
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
| | - Xinjin Li
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
| | - Huijuan Lin
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
| | - Shasha Song
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
| | - Xiangye Li
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
| | - Yunhui Dong
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong, P. R. China.
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2
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Fekete E, Csiszár E. Chitosan-Alginate Gels for Sorption of Hazardous Materials: The Effect of Chemical Composition and Physical State. Int J Mol Sci 2024; 25:8406. [PMID: 39125991 PMCID: PMC11312824 DOI: 10.3390/ijms25158406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/22/2024] [Accepted: 07/24/2024] [Indexed: 08/12/2024] Open
Abstract
Chitosan, alginate, and chitosan-alginate (50:50) mixed hydrogels were prepared by freeze casting, freeze-drying, and subsequent physical cross-linking. Chitosan was cross-linked with citrate and alginate with calcium ions, while the mixed gels were cross-linked with both cross-linking agents. Both cryogels and xerogels were obtained by lyophilization and drying of the hydrogels. We investigated the effect of the chemical composition and the physical state of gels on the gel structure and sorption of model dyes. Alginate and mixed gels cross-linked with Ca2+ ions sorbed 80-95% of cationic dye from the solutions. The chitosan gels are primarily capable of adsorbing anionic dyes, but at near-neutral pH, their capacity is lower than that of alginate gels, showing 50-60% dye sorption. In the case of alginate gels, the dye sorption capacity of xerogels, cryogels, and hydrogels was the same, but for chitosan gels, the hydrogels adsorbed slightly less dye than the dried gels.
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Affiliation(s)
- Erika Fekete
- Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, Hungary
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary;
| | - Emília Csiszár
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary;
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3
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Wang M, Wang L, Hou A, Hong M, Li C, Yue Q. Portable sensing methods based on carbon dots for food analysis. J Food Sci 2024; 89:3935-3949. [PMID: 38865253 DOI: 10.1111/1750-3841.17148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 05/03/2024] [Accepted: 05/14/2024] [Indexed: 06/14/2024]
Abstract
Food analysis is significantly important in monitoring food quality and safety for human health. Traditional methods for food detection mainly rely on benchtop instruments and require a certain amount of analysis time, which promotes the development of portable sensors. Portable sensing methods own many advantages over traditional techniques such as flexibility and accessibility in diverse environments, real-time monitoring, cost-effectiveness, and rapid deployment. This review focuses on the portable approaches based on carbon dots (CDs) for food analysis. CDs are zero-dimensional carbon-based material with a size of less than 10 nm. In the manner of sensing, CDs exhibit rich functional groups, low biotoxicity, good biocompatibility, and excellent optical properties. Furthermore, there are many methods for the synthesis of CDs using various precursor materials. The incorporation of CDs into food science and engineering for enhancing food safety control and risk assessment shows promising prospects.
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Affiliation(s)
- Min Wang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China
| | - Lijun Wang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China
| | - Aiying Hou
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China
| | - Min Hong
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China
| | - Chenzhong Li
- Biomedical Engineering, School of Medicine, The Chinese University of Hong Kong, Shenzhen, China
| | - Qiaoli Yue
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, China
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Kanagalakshmi M, Devi SG, Subasini S, Amalan AJ, Pius A. Experimental assessment of biostimulants on mung bean growth on a soilless culture system using superabsorbent pectin based hydrogel. Int J Biol Macromol 2024; 273:133058. [PMID: 38866278 DOI: 10.1016/j.ijbiomac.2024.133058] [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: 01/11/2024] [Revised: 06/06/2024] [Accepted: 06/08/2024] [Indexed: 06/14/2024]
Abstract
Sustainable agriculture initiatives are needed to ensure the food security of the people all over the world. Soilless cultivation methods using hydrogels may give a revolutionary response as well as a more ecological and productive alternative to conventional farming. This study attempted extraction of pectin from the rind of albedo yellow passion fruit (Passiflora edulis var. flavicarpa Degener)and hydrogels from pectin and activated carbon was compared with pure pectin hydrogel; Pectin- Activated Carbon hydrogels (PAC) showed a microporous structure with excellent hydrophilicity and showed superior water holding capacity. Then the prepared hydrogels were examined with various instrumental techniques like FTIR, SEM, XRD, Raman, BET and rheological properties. In the BET analysis, PAC3 shows the highest surface area of 28.771 m2/g when compared to PAC0 at 15.063 m2/g. The germination experiments were performed using mung beans. This study provides an opportunity for the application of pectin hydrogels in agriculture field specifically for home garden or rooftop cultivation.
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Affiliation(s)
- M Kanagalakshmi
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul 624 302, Tamil Nadu, India
| | - S Gopika Devi
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul 624 302, Tamil Nadu, India
| | - S Subasini
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul 624 302, Tamil Nadu, India
| | - A Joel Amalan
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul 624 302, Tamil Nadu, India
| | - Anitha Pius
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, Dindigul 624 302, Tamil Nadu, India.
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5
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Davidson MK, Protacio RU, Helmlinger D, Wahls WP. Laboratory horror stories: Poison in the agars. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.06.597796. [PMID: 38895319 PMCID: PMC11185651 DOI: 10.1101/2024.06.06.597796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
The fission yeast Schizosaccharomyces pombe is a single-celled eukaryote that can be cultured as a haploid or as a diploid. Scientists employ mating, meiosis, and the plating of ascospores and cells to generate strains with novel genotypes and to discover biological processes. Our two laboratories encountered independently sudden-onset, major impediments to such research. Spore suspensions and vegetative cells no longer plated effectively on minimal media. By systematically analyzing multiple different media components from multiple different suppliers, we identified the source of the problem. Specific lots of agar, from different suppliers, were toxic. Interestingly, the inhibitory effect was attenuated on rich media. Consequently, quality control checks that use only rich media can provide false assurances on the quality of the agar. Lastly, we describe likely sources of the toxicity and we provide specific guidance for quality control measures that should be applied by all vendors as preconditions for their sale of agar.
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Affiliation(s)
- Mari K. Davidson
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, 4301 West Markham Street (slot 516), Little Rock, AR 72205-7199, USA
| | - Reine U. Protacio
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, 4301 West Markham Street (slot 516), Little Rock, AR 72205-7199, USA
| | - Dominique Helmlinger
- Centre de Recherche en Biologie Cellulaire de Montpellier, University of Montpellier, CNRS, 1919 Route de Mende, 34293, Montpellier Cedex 05, France
| | - Wayne P. Wahls
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, 4301 West Markham Street (slot 516), Little Rock, AR 72205-7199, USA
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Wu C, McClements DJ, Ma B, Lai Z, Wu F, Liu X, Wang P. Composite hydrogels formed from okara cellulose nanofibers and carrageenan: Fabrication and characterization. Int J Biol Macromol 2024; 258:129079. [PMID: 38161024 DOI: 10.1016/j.ijbiomac.2023.129079] [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: 10/04/2023] [Revised: 12/11/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Currently, there is great interest in converting edible agro-waste, such as okara from soybean production, into value-added products. For this study, we focus on fabricating composite hydrogels from okara cellulose nanofibers (CNFs) and carrageenan (CA). We also examined the effects of TEMPO oxidation of the okara CNFs, as well as CA concentration, on the microstructure and physicochemical properties of the composite hydrogels. The water holding capacity, oil holding capacity, surface tension, gel strength, and viscoelasticity of the composite microgels increased with increasing CA concentration, and it was found that the highest values were obtained for TC-CA2 hydrogel: contact angle = 43.6° and surface tension = 45.12 mN/m, which was attributed to the formation of a more regular and dense three-dimensional gel network. All the CNF-CA microgels had highly anionic ζ-potential values (-38.8 to -50.1 mV), with the magnitude of the negative charge increasing with TEMPO oxidation and carrageenan concentration. These results suggest there would be strong electrostatic repulsion between the composite hydrogels. The composite microgels produced in our work may be useful functional materials for utilization within the food industry, thereby converting a waste product into a valuable commodity.
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Affiliation(s)
- Changling Wu
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China; Suzhou Zuoci Technology Co., Ltd, Suzhou 215100, China.
| | | | - Bohui Ma
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China
| | - Zhiquan Lai
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China
| | - Fenghua Wu
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China
| | - Xingquan Liu
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China.
| | - Peng Wang
- Department of Food Science, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang 311300, China; National Grain Industry (High-Quality Rice Storage in Temperate and Humid Region) Technology Innovation Center, Hangzhou 311300, China.
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7
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Ma X, Qu K, Zhao X, Wang Y, Zhang X, Zhang X, Zhou X, Ding J, Wang X, Ma L, Xue Z, Niu Y, Xu W, Wu N, Hao J. Oxidized sodium alginate/polyacrylamide hydrogels adhesive for promoting wheat growth. Int J Biol Macromol 2023; 253:127450. [PMID: 37844819 DOI: 10.1016/j.ijbiomac.2023.127450] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 10/18/2023]
Abstract
Chemical modification of sodium alginate (SA) polymer chains can increase its functional group species. Sodium periodate (SP) was usually used to oxidize the hydroxyl groups on the chain of SA to aldehyde groups, the preparation of oxidized sodium alginate (OSA) using SP is not only complicated, also limits the variety of functional groups on the chain of OSA. By contrast, we have developed an innovative strategy for OSA, in which ammonium persulfate (APS) was used to oxidize SA, providing a clear elucidation of the oxidizing process and mechanism. OSA/PAM hydrogels were synthesized using OSA, the hydrogels possess excellent adhesion properties to various non-metallic and metallic substrates. Tensile and compression tests show that the cross-linked OSA/PAM hydrogels have superior mechanical properties. We exploit OSA/PAM hydrogels as soil adhesive and water-retaining agents for wheat growth. OSA/PAM hydrogels significantly improve the survival time of wheat grown in brown loam soil under a water-shortage environment, and slow down the wilting of wheat in a water-shortage environment and prolong the survival time of wheat in sandy soils. Our trials should make hydrogels important for wheat cultivation in brown loam soils and the development of desert areas.
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Affiliation(s)
- Xintao Ma
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Keyu Qu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xiaohan Zhao
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Yanyan Wang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xin Zhang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xiaoran Zhang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xun Zhou
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Junjie Ding
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xinze Wang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Lin Ma
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China
| | - Zhongxin Xue
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Yuzhong Niu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Wenlong Xu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China; Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai 264000, China.
| | - Nan Wu
- Yantai Key Laboratory of Coastal Hydrological Processes and Environmental Security, School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China; Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai 264000, China.
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8
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Torres-Figueroa AV, de los Santos-Villalobos S, Rodríguez-Félix DE, Moreno-Salazar SF, Pérez-Martínez CJ, Chan-Chan LH, Ochoa-Meza A, del Castillo-Castro T. Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications. ACS OMEGA 2023; 8:44784-44795. [PMID: 38046300 PMCID: PMC10688162 DOI: 10.1021/acsomega.3c05868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/13/2023] [Accepted: 10/31/2023] [Indexed: 12/05/2023]
Abstract
The preparation method of hydrogels has a significant effect on their structural and physicochemical properties. In this report, physically and chemically cross-linked poly(vinyl alcohol) (PVA) networks containing humic acid (HA) were alternatively prepared by autoclaving (AC) and through glutaraldehyde (GA) addition, respectively, for agricultural purposes. PVA/HA hydrogels were comparatively characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, mechanical assays, scanning electron microscopy, swelling kinetics measurements, and water retention tests in soil. AC hydrogels showed a more homogeneous porous microstructure, higher swelling levels, and a better capacity to preserve the humidity of soil than those obtained by adding GA. Both PVA/HA hydrogels exhibited no phytotoxicity on cultivation trials of Sorghum sp., but the plant growth was promoted with the GA-cross-linked network as compared to the effect of the AC sample. The release behavior of urea was modified according to the preparation method of the PVA/HA hydrogels. After 3 days of sustained urea release, 91% of the fertilizer was delivered from the AC hydrogel, whereas a lower amount of 56% was released for the GA-cross-linked hydrogel. Beyond the advantages of applying PVA/HA hydrogels in the agricultural field, an appropriate method of preparing these materials endows them with specific properties according to the requirements of the target crop.
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Affiliation(s)
- Ana V. Torres-Figueroa
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
| | - Sergio de los Santos-Villalobos
- Laboratorio
de Biotecnología del Recurso Microbiano, Departamento de Ciencias
Agronómicas y Veterinarias, Instituto
Tecnológico de Sonora, 5 de Febrero 818 Sur, Colonia Centro, Obregón 85000, Mexico
| | - Dora E. Rodríguez-Félix
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
| | - Sergio F. Moreno-Salazar
- Departamento
de Agricultura y Ganadería, Universidad
de Sonora, Carr. Bahía de Kino, Km. 21. Apartado Postal 305, Hermosillo, Sonora 83000, Mexico
| | | | - Lerma H. Chan-Chan
- Departamento
de Física, CONAHCyT, Universidad
de Sonora, Hermosillo 83000, Mexico
| | - Andrés Ochoa-Meza
- Departamento
de Agricultura y Ganadería, Universidad
de Sonora, Carr. Bahía de Kino, Km. 21. Apartado Postal 305, Hermosillo, Sonora 83000, Mexico
| | - Teresa del Castillo-Castro
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
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Li K, Ma L, Gao Y, Zhang J, Li S. Characterizing a Cost-Effective Hydrogel-Based Transparent Soil. Gels 2023; 9:835. [PMID: 37888408 PMCID: PMC10606193 DOI: 10.3390/gels9100835] [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: 09/19/2023] [Revised: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 10/28/2023] Open
Abstract
Transparent soil (TS) was specifically designed to support root growth in the presence of air, water, and nutrients and allowed the time-resolved phenotyping of roots in vivo. Nevertheless, it is imperative to further optimize the reagent cost of TS to enable its wider utilization. We substituted the costly Phytagel obtained from Sigma with two more economical alternatives, namely Biodee and Coolaber. TS beads from each brand were prepared using 12 different polymer concentrations and seven distinct crosslinker concentrations. A comprehensive assessment encompassing transparency, mechanical characteristics, particle size, porosity, and stability of TS was undertaken. Compared to the Sigma Phytagel brand, both Biodee and Coolaber significantly reduced the transparency and collapse stress of the TS they produced. Consequently, this led to a significant reduction in the allowable width and height of the growth box, although they could still simultaneously exceed 20 cm and 19 cm. There was no notable difference in porosity and stability among the TS samples prepared using the three Phytagel brands. Therefore, it is feasible to consider replacing the Phytagel brand to reduce TS production costs. This study quantified the differences in TS produced using three Phytagel brands at different prices that will better promote the application of TS to root phenotypes.
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Affiliation(s)
- Kanghu Li
- Key Laboratory of Crop Water Use and Regulation, Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; (K.L.); (Y.G.)
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Lin Ma
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, China;
| | - Yang Gao
- Key Laboratory of Crop Water Use and Regulation, Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; (K.L.); (Y.G.)
- Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China
| | - Jiyang Zhang
- Key Laboratory of Crop Water Use and Regulation, Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; (K.L.); (Y.G.)
| | - Sen Li
- Key Laboratory of Crop Water Use and Regulation, Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; (K.L.); (Y.G.)
- Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China
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10
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Miao G, Xu L, Li F, Miao X, Hou Z, Xu T, Ren G, Yang X, Qiu J, Zhu X. Simple and Rapid Way to a Multifunctionally Conductive Hydrogel for Wearable Strain Sensors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:10530-10541. [PMID: 37460098 DOI: 10.1021/acs.langmuir.3c01068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Conductive hydrogels have gained increasing attention in the field of wearable smart devices. However, it remains a big challenge to develop a multifunctionally conductive hydrogel in a rapid and facile way. Herein, a conductive tannic acid-iron/poly (acrylic acid) hydrogel was synthesized within 30 s at ambient temperature by the tannic acid-iron (TA@Fe3+)-mediated dynamic catalytic system. The TA@Fe3+ dynamic redox autocatalytic pair could efficiently activate the ammonium persulfate to initiate the free-radical polymerization, allowing the gelation to occur easily and rapidly. The resulting hydrogel exhibited enhanced stretchability (3560%), conductivity (33.58 S/m), and strain sensitivity (gauge factor = 2.11). When damaged, it could be self-healed through the dynamic and reversible coordination bonds between the Fe3+ and COO- groups in the hydrogel network. Interestingly, the resulting hydrogel could act as a strain sensor to monitor various human motions including the huge movement of deformations (knuckle, wrist) and subtle motions (smiling, breathing) in real time due to its enhanced self-adhesion, good conductivity, and improved strain sensitivity. Also, the obtained hydrogel exhibited efficient electromagnetic interference (EMI) shielding performance with an EMI shielding effectiveness value of 24.5 dB in the X-band (8.2-12.4 GHz). Additionally, it displayed antibacterial properties, with the help of the activity of TA.
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Affiliation(s)
- Gan Miao
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Lide Xu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Fangchao Li
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Xiao Miao
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, China
| | - Zhiqiang Hou
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Ting Xu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Guina Ren
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Xiaoyang Yang
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Jianxun Qiu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
| | - Xiaotao Zhu
- School of Environmental and Material Engineering, Yantai University, Yantai 264405, China
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Shandong Laboratory of Advanced Materials and Green Manufacturing, Yantai 264006, China
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