Fabrication of Amino Acid Based Silver Nanocomposite Hydrogels from PVA- Poly(Acrylamide-co-Acryloyl phenylalanine) and Their Antimicrobial Studies

Cha, Hyeong‐Rae; Babu, V. Ramesh; Rao, K.S.V. Krishna; Kim, Yong Hyun; Mei, Surong; Joo, Woo Hong; Lee, Yong‐Ill

doi:10.5012/bkcs.2012.33.10.3191

Cited by 11 publications

(3 citation statements)

References 37 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After this stage, the decomposition rate starts to increase. These results show that the DN gels can effectively work at higher temperatures while retaining water as validated by previous researchers [19,20].…”

Section: Tga and Dsc Curvessupporting

confidence: 87%

Passive cooling performance of polyacrylamide hydrogel on wooden and brick houses and effect of nanoparticle integration on its mechanical strength

Riaz

Nasir

Nauman

et al. 2021

Plastics, Rubber and Composites

View full text Add to dashboard Cite

Thermoresponsive hydrogels have been studied in the past as self-healing and ultra-porous materials. Single-network (SN) and double-network (DN) hydrogels were synthesised in this research using acrylamide, acrylic acid, and alginate. Nano reinforcements were added only to increase the mechanical strength which is reported up to 300%. These DN hydrogels showed brilliant cooling performance showing 8-12°C lesser in a coated house for over 7 h with a single hydration cycle. Tough hydrogels were tested under direct sunlight on wooden and brick houses during the summer of Pakistan, where a 10-20°C temperature difference was reported. Thermographs and FTIR spectra showed that the ionic and covalent crosslinkers were responsible for the excellent robustness. DN hydrogel gave better strength and cooling effectiveness for a longer period than SN hydrogels. Carbon emission and electricity consumption can be reduced using DN hydrogels. These hydrogels can aid the industry of smart buildings and passive cooling.

show abstract

Section: Tga and Dsc Curvessupporting

confidence: 87%

Passive cooling performance of polyacrylamide hydrogel on wooden and brick houses and effect of nanoparticle integration on its mechanical strength

Riaz

Nasir

Nauman

et al. 2021

Plastics, Rubber and Composites

View full text Add to dashboard Cite

show abstract

“…Figure 5 b highlights AgNPs with diameters of approximately 70 nm, which is consistent with the surface plasmon resonance peak observed at 450 nm, indicative of their size distribution. Additionally, TEM images were obtained to observe the presence of AgNPs within the CMCS-SB hydrogel network ( Figure 5 c) [ 52 , 53 ], for which AgNPs/CMCS-SB nanocomposites were finely ground, equilibrated in distilled water for three days, and then sonicated to facilitate the release of AgNPs from the swollen hydrogel network. This phenomenon can be attributed to factors such as the increased mesh size of the network, the relaxation of polymeric chains entangled around the AgNPs, and decreased binding between the stabilized AgNPs and electron-rich nitrogen atoms of the macromolecular chain.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Evaluation of Silver Nanoparticle-Loaded Carboxymethyl Chitosan with Sulfobetaine Methacrylate Hydrogel Nanocomposites for Biomedical Applications

Mohandoss,

Velu,

Manoharadas

et al. 2024

Polymers

View full text Add to dashboard Cite

In this study, nanocomposites of AgNPs encapsulated in carboxymethyl chitosan (CMCS) with sulfobetaine methacrylate (SB) hydrogel (AgNPs/CMCS-SB) were synthesized. The UV-Vis spectra indicated the presence of AgNPs, with a broad peak at around 424 nm, while the AgNPs-loaded CMCS-SB nanocomposite exhibited absorption peaks at 445 nm. The size and dispersion of AgNPs varied with the concentration of the AgNO3 solution, affecting swelling rates: 148.37 ± 15.63%, 172.26 ± 18.14%, and 159.17 ± 16.59% for 1.0 mM, 3.0 mM, and 5.0 mM AgNPs/CMCS-SB, respectively. Additionally, water absorption capacity increased with AgNPs content, peaking at 11.04 ± 0.54% for the 3.0 mM AgNPs/CMCS-SB nanocomposite. Silver release from the nanocomposite was influenced by AgNO3 concentration, showing rapid initial release followed by a slower rate over time for the 3.0 mM AgNPs/CMCS-SB. XRD patterns affirmed the presence of AgNPs, showcasing characteristic peaks indicative of a face-centered cubic (fcc) structure. The FTIR spectra highlighted interactions between AgNPs and CMCS-SB, with noticeable shifts in characteristic bands. In addition, SEM and TEM images validated spherical AgNPs within the CMCS-SB hydrogel network, averaging approximately 70 and 30 nm in diameter, respectively. The nanocomposite exhibited significant antibacterial activity against S. aureus and E. coli, with inhibition rates of 98.9 ± 0.21% and 99.2 ± 0.14%, respectively, for the 3.0 mM AgNPs/CMCS-SB nanocomposite. Moreover, cytotoxicity assays showcased the efficacy of AgNPs/CMCS-SB against human colorectal cancer cells (HCT-116 cells), with the strongest cytotoxicity (61.7 ± 4.3%) at 100 μg/mL. These results suggest the synthesized AgNPs/CMCS-SB nanocomposites possess promising attributes for various biomedical applications, including antimicrobial and anticancer activities, positioning them as compelling candidates for further advancement in biomedicine.

show abstract

“…Addition of Ag + ions and the reducing agent NaHB 4 produced a promising antibacterial hydrogel, which could reduce 83.5% of Escherichia coli growth. Cha et al synthesized a AgNP hybrid hydrogel based on copolymerization of PVA and poly(acryl amide‐ co ‐acryloyl phenyl alanine) with NaHB 4 as the reducing agent. The hybrid gel exhibited strong antibacterial effect on E. coli and Staphylococcus aureus compared to the one without AgNPs, demonstrating the novel antibacterial effect of AgNPs.…”

Section: Fundamental Applications Of Metallogelsmentioning

confidence: 99%

Metallogels: Availability, Applicability, and Advanceability

et al. 2019

View full text Add to dashboard Cite

amount of cross-linked solid. According to the nature of solvents, gels are categorized into hydrogel and organogel to indicate whether the solvent is water or organic solvent(s), respectively. As to the gelation driving forces, gels can be classified into physical gels in which intermolecular interactions are responsible for gel formation, and chemical gels in which the gel skeleton is cross-linked by covalent bonds.Incorporation of metal components (metal ions, metal-organic molecules, and metal nanoparticles) is an effective way to locally establish extra interactions among the building blocks and consequently trigger gel formation, [2][3][4] weaken [5] or enhance [6] gel strength, and modify gel morphology. [7,8] Moreover, addition of metal components is a straightforward way to integrate the specific properties of metals with the properties of organic matrix, therefore to tune properties like conductivity, [9] color, [10,11] rheological behavior, [12] adsorption, [13] emission, [14] photophysical properties, [15] magnetism, [16,17] antibacterial activities, [18,19] catalytic activities, [20][21][22][23] redox activities, [24,25] and selfhealing properties. [26][27][28] Therefore, a broad response range to physical and chemical stimuli can be achieved. For instance, the incorporation of multivalence ions such as Fe 2+ /Fe 3+ , [25,29] Co 2+ / Co 3+ , [30] Cu + /Cu 2+ , [31] results in redox reactive hydrogels; the incorporation of magnetic nanoparticles like Fe 3 O 4[17] causes the gel to respond to external magnetic fields. In addition to the abovementioned intrinsically functional superiorities, metallogels can also serve as ideal templates to generate new materials, [13,22,23,32,33] such as 3D networks, [34] porous structures, [35] chiral materials, [36][37][38] quantum dots, [39] and nanorods. [40] Following the rapid advancement of exploration on the knowledge acquisition toward the major roles that metallogels are playing in catalysis, sensing, biomedicine, electronics, and optical devices, the focus of research has been transferred to the design principles of metallogels in the last decade. Owing to the advancements in the instrumental characterizations and theoretical calculations, [41] a number of pioneering efforts on metallogel design have been made and several innovative reviews have summarized these inspiring contributions. [32,[42][43][44] Despite their extensively acknowledged application advantages in many fields, the discovery of new metallogels with expected functionalities is still highly dependent on experimental screening and serendipity. The challenge stems from the susceptible balance among those complicated intermolecular interactions and the elaborate structure requirements of metallogels.Another research niche that needs to be clarified before discussing recent development of metallogels is: how to sort Introducing metal components into gel matrices provides an effective strategy to develop soft materials with advantageous properties such as: optical activity, conductivity, magn...

show abstract

Fabrication of Amino Acid Based Silver Nanocomposite Hydrogels from PVA- Poly(Acrylamide-co-Acryloyl phenylalanine) and Their Antimicrobial Studies

Cited by 11 publications

References 37 publications

Passive cooling performance of polyacrylamide hydrogel on wooden and brick houses and effect of nanoparticle integration on its mechanical strength

Passive cooling performance of polyacrylamide hydrogel on wooden and brick houses and effect of nanoparticle integration on its mechanical strength

Synthesis, Characterization, and Evaluation of Silver Nanoparticle-Loaded Carboxymethyl Chitosan with Sulfobetaine Methacrylate Hydrogel Nanocomposites for Biomedical Applications

Metallogels: Availability, Applicability, and Advanceability

Contact Info

Product

Resources

About