Controlled in situ formation of polyacrylamide hydrogel on PET surface via SI-ARGET-ATRP for wound dressings

Pour, Sedigheh Nazari; Ghugare, Shivkumar V.; Wiens, Richard; Gough, Kathleen; Liu, Song

doi:10.1016/j.apsusc.2015.04.181

Cited by 40 publications

(10 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Polyacrylamide-based hydrogels are important components of portable electronics, decontamination agents, separation membranes, hygienic products, sealing, coal dewatering mediators, wound dressings and biosensors [1][2][3][4][5][6][7][8]. They have been also successfully applied as an elastic platform for electrodes used in light-weight capacitors [9].…”

Section: Introductionmentioning

confidence: 99%

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Radtke

Ignaszak

2018

Mater Renew Sustain Energy

View full text Add to dashboard Cite

In this study, we optimized the dispersion of hydrophobic carbons within ionically conductive hydrogels composed of a poly (acrylamide)-pAAm/poly (N,N-methylenebisacrylamide)-pMBAA modified with Nafion 117 ®. The carbon-embedded hydrogel films were prepared by in situ UV polymerization of aqueous suspension containing KCl, acrylamide and N,Nmethylenebisacrylamide monomers, the multi-walled-carbon nanotubes, graphene, single-walled carbon nanohorns, and their composites with polypyrrole. These electrodes were translucent, stretchable, ionically and electronically conductive at low carbon content. In addition, they were very flexible, reaching a stretch up to 1475.57% of their initial length. Mechanical characteristics and conductivity were measured at their maximum hydration, corresponding to water uptake of 47.20% after 5 days of curing in humidity chamber. Hydrogels with dispersed carbon demonstrated both ionic and electronic conductivity in hydrated state and electronic conductivity alone when the electrode was dry. Nafion 117 ® acted as a surfactant and played a significant role in the improvement of carbon distribution within the hydrogel due to the hydrophobic-hydrophilic interaction between hydrogel, Nafion and the carbon. This was further correlated with changes in zeta potential at the carbon-hydrogel interface upon addition of Nafion, measured using a rotating disk electrode voltammetry.

show abstract

Section: Introductionmentioning

confidence: 99%

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Radtke

Ignaszak

2018

Mater Renew Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Due to its intrinsic transparence, softness, and biocompatibility, the use of hydrogel in wound dressing shows great potential in real-world applications compared to other materials. − Many efforts have been made on new hydrogel wound dressings with superior antifouling property to improve the traditional wound dressings. − Hydrogel wound dressings have seen great development in recent years, from single function to multifunction, and become smarter, such as stimuli-responsive hydrogels. − However, the preparation methods for antibacterial wound dressing was complex. Moreover, almost all hydrogel wounding dressings with single function or multiple functions have similar structures.…”

Section: Introductionmentioning

confidence: 99%

“Janus-Featured” Hydrogel with Antifouling and Bacteria-Releasing Properties

Zhang

et al. 2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Janus-featured" hydrogels with different structure and function for each layer can be particularly important in diverse application. However, very few studies have been conducted on multifunctional Janus-featured hydrogel, and significant challenge for simple, rapid, and efficient fabrication of such hydrogels remains. Herein, Janus-featured poly(N-hydroxyethyl acrylamide) (polyHEAA) hydrogel loaded with modified silica nanoparticle was fabricated by the supergravity method. Silica nanoparticles grafted with poly(3-(dimethyl(4-vinylbenzyl) ammonio) propyl sulfonate) (polyDVBAPS) were first prepared and then introduced into progel of polyHEAA hydrogel. During the formation of the hydrogel, a supergravity resulting from centrifugation was applied, from which silica nanoparticles moved to one side of the hydrogel, forming Janus-featured hydrogels, i.e., a pristine polyHEAA layer and a composite layer. These two layers showed different properties, where the prinstine polyHEAA layer showed excellent antifouling property by resisting the bacteria adsorption (<10 6 cells/cm 2 ) for up to 5 days, and the nanoparticle-loaded hydrogel layer showed excellent bacteria-releasing properties by releasing >94% adherent bacteria upon a simple treatment with 2.0 M NaCl solution for 10 min. Based on its superb biocompatibility and low biotoxicity, we expect that our interesting strategy may provide a new assumption for the fabrication of "Janus featured" hydrogel and hopefully offer reference significance for the design of hydrogel-based wound dressing in the near future.

show abstract

“…The peaks were deconvoluted into four components, centered at 284.8, 285.4, 286, and 289 eV, which can be attributed to C−C bonds, C−O bonds, C−N bonds, and O−CO bonds, respectively. 30,31 The appearance of a peak at 289 eV indicates the successful formation of PAA, with the amount of carboxylic groups increasing from 1.7% to 10.9%. In addition, the continual existence of chlorine (Figure 2a) on the membrane surface after PAA polymerization indicates the successful implementation of eATRP reaction; these chlorine groups act as initiating sites that would allow further extension of the polymer chains, so that targeting of specific degrees of polymerization is possible.…”

mentioning

confidence: 98%

“…Figures b and c show the high-resolution spectra of C 1s after CMPS deposition and PAA polymerization, respectively. The peaks were deconvoluted into four components, centered at 284.8, 285.4, 286, and 289 eV, which can be attributed to C–C bonds, C–O bonds, C–N bonds, and O–CO bonds, respectively. , The appearance of a peak at 289 eV indicates the successful formation of PAA, with the amount of carboxylic groups increasing from 1.7% to 10.9%. In addition, the continual existence of chlorine (Figure a) on the membrane surface after PAA polymerization indicates the successful implementation of eATRP reaction; these chlorine groups act as initiating sites that would allow further extension of the polymer chains, so that targeting of specific degrees of polymerization is possible. , Surface characterization using contact angle goniometry and Fourier transform infrared spectroscopy (FTIR) also showed the successful fabrication of the membrane in each step (see Figure S7 in the Supporting Information).…”

mentioning

confidence: 98%

Electrically Mediated Membrane Pore Gating via Grafted Polymer Brushes

Khor

Zhu

Messina

et al. 2019

ACS Materials Lett.

View full text Add to dashboard Cite

Stimuli-responsive membranes that enable the smart control of membrane transport properties represent an interesting class of materials for a wide range of separation processes. In this work, surface-initiated, electrochemically mediated atom transfer radical polymerization was used to grow poly(acrylic acid) brushes from the surface of a percolating network of carbon nanotubes coating an ultrafiltration membrane. Brush molecular weights as high as 930 kDa were achieved, with very low dispersivity. When no potential was applied, the material was able to reject 88% of 12 kDa dextran in 50 mM NaCl solution. Membrane rejection and flux were readily changed upon the application of electrical potentials, with positive potentials increasing flux by 85% and reducing rejection by 56%, while negative potentials reduced flux by 30% and increased rejection by 5%. We show evidence that counterion migration, moving in response to the applied electric field, is responsible for the expansion or collapse of the grafted charged polymer brushes, which induced or eliminated pore gating. In addition, atomic force microscopy was used to probe the forces exerted by brush conformational changes in response to the applied field. These materials can find applications in industrial separations where gating is needed and may possess interesting anti-fouling properties.

show abstract

Controlled in situ formation of polyacrylamide hydrogel on PET surface via SI-ARGET-ATRP for wound dressings

Cited by 40 publications

References 45 publications

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

Stretchable current collectors based on carbon embedded in a poly (acrylamide)/poly (N,N-methylenebisacrylamide) hydrogel modified with Nafion 117®

“Janus-Featured” Hydrogel with Antifouling and Bacteria-Releasing Properties

Electrically Mediated Membrane Pore Gating via Grafted Polymer Brushes

Contact Info

Product

Resources

About