Superabsorbent, High Porosity, PAMPS‐Based Hydrogels through Emulsion Templating

Kovačič, Sebastijan; Silverstein, Michael S.

doi:10.1002/marc.201600249

Cited by 89 publications

(58 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(f). Moreover, the crosslinked SANs showed larger swelling ratio, up to a maximum of 134.8% for 7‐SAN at 150 °C, because of the osmotic pressure and capillary force, as mentioned above …”

Section: Resultsmentioning

confidence: 60%

See 1 more Smart Citation

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

Choi

Kim

2019

Polymer International

View full text Add to dashboard Cite

Superabsorbent polymers (SAPs) have been widely studied and used in various industries. In this study, SAPs based on sodium polyacrylate (NaPAA) and poly(vinyl alcohol) were successfully prepared in the form of nanofibers using the electrospinning technique. The heat‐treated superabsorbent nanofibers (SANs) with 7 wt% of NaPAA and containing both crystal structures and crosslinks presented the best absorption performance, with up to 3.9 times and 134% increase in the absorption area and swelling ratio, respectively. Furthermore, the crystal structure and crosslinking of the SANs enabled them to maintain their fiber network during water absorption and recovery. The absorption rate of SANs having both crystal structures and crosslinks was slightly lower than that of nanofibers with only crystal structures, but it was still higher than that of SAPs because of the highly porous nature of the nanowebs. The easy processing and structural stability of SANs are expected to be useful in a wide range of applications. © 2019 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 60%

“…Moreover, the crosslinked SANs showed larger swelling ratio, up to a maximum of 134.8% for 7-SAN at 150 ∘ C, because of the osmotic pressure and capillary force, as mentioned above. 18,45 The role of crosslinks is important in the recovery property of SANs (see supporting information, Fig. S5).…”

Section: Resultsmentioning

confidence: 99%

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

Choi

Kim

2019

Polymer International

View full text Add to dashboard Cite

show abstract

“…Recently, a variety of BCP surfactants were used to promote anchoring the surfactant in the polymer wall through entanglement. These BCPs can be used to tune the surface chemistry by designing a specific block that would spontaneously migrate to the oil‐water interface . Most recently, surfactants with polymerizable groups were covalently anchored to the polymer wall surface, and in some syntheses, the polymerizable surfactant was the only monomer .…”

Section: Emulsion Templating: Space – the Porous Frontiermentioning

confidence: 99%

“…These BCPs can be used to tune the surface chemistry by designing a specific block that would spontaneously migrate to the oil-water interface. [72][73][74][75] Most recently, surfactants with polymerizable groups were covalently anchored to the polymer wall surface, and in some syntheses, the polymerizable surfactant was the only monomer. [76][77][78][79][80][81][82][83][84] Pickering HIPEs, HIPEs stabilized using either inorganic or polymeric amphiphilic nanoparticles (NPs), have also been developed.…”

Section: Emulsification: Divide the Waters From The Watersmentioning

confidence: 99%

The Chemistry of Porous Polymers: The Holey Grail

Silverstein

2020

Israel Journal of Chemistry

Self Cite

View full text Add to dashboard Cite

Porous polymers have been evolving continuously since the introduction of foam rubber in 1929. Today, pore diameters ranging from sub‐nanometre to millimetre can be generated controllably. Cutting‐edge porous polymers are now being applied at the forefront of critical problems with societal and environmental impact including advanced systems for biomedicine, water purification, energy storage, and gas purification and storage. The commonly‐used pore generation approaches include macromolecular design, self‐assembly, phase separation, solid and liquid templating, sol‐gel formation, and foaming. In each, The Chemistry of Polymers, both the polymerization chemistry and the macromolecular structural chemistry, must be applied advantageously to generate the empty volume within the polymer and then fix it in place. This essay will traverse the various pore size scales, describing the chemistries involved and discussing their implications.

show abstract

“…[6][7][8][9][10][11] Particularly, hydrophilic poly (HIPE)s are attractive materials because of their potential applications as 3D scaffolds, 12,13 catalyst support, 14,15 adsorption, 16 among others; however, they have shown limited development compared with hydrophobic varieties. In particular, polyelectrolyte poly (HIPE)s have received limited investigation, 8,17,18 these porous materials bear ionizable groups or permanent charges in their structure and are good candidates to be applied in the field of superabsorbents 17 and adsorbents for water pollutant scavengers. 19,20 This work aims to synthesize cationic polyelectrolyte poly (HIPE)bearing quaternary ammonium groups (-N + R 3 ) through an oil-in-water high internal phase emulsion.…”

Section: Introductionmentioning

confidence: 99%

Porous, bicontinuous, and cationic polyelectrolyte obtained by high internal phase emulsion polymerization

Walter

Toledo

Urbano

2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

In this work, a cationic polyelectrolyte was synthesized through oil‐in‐water high internal phase emulsion polymerization. The porous polymer was obtained using the monomer (4‐vinyl benzyl)trimethylammonium chloride and cross‐linked with N,N‐methylene‐bis‐acrylamide; additionally, ethylene glycol dimethacrylate (EGDMA) was used as the second cross‐linker, which was solubilized in the discontinuous phase leading to a bicontinuous‐like HIPE system because of the characteristics of this cross‐linker and the phase, where polymerized several effects on the polyHIPE were expected. In this way, the effect of the emulsifier and EGDMA content on the pore size, swelling, and rheological properties was assessed. It was observed that an increased concentration of the emulsifier in the polymerization decreased the pore size, narrowed its size distribution, and diminished the swelling capacity of the polymer. Additionally, the poly (HIPE) displayed a close‐cell structure explained by the locus of initiation starting from the droplets of the emulsion. After the addition of EGDMA, the polymer exhibited a major decrease in pore size and a significant decrease in swelling attributed to the polymerized skin layer on the droplet and hydrophobicity provided by the polyEGDMA, respectively. Rheological assays revealed an increase in the complex modulus and shear stress as the pore size decreased, but the addition of EGDMA did not produce an increase in the modulus, as expected. Finally, the sorption capabilities of the cationic porous polymers were evaluated through kinetic and isotherm sorption experiments using the anionic dye Acid Black 24.

show abstract

Superabsorbent, High Porosity, PAMPS‐Based Hydrogels through Emulsion Templating

Cited by 89 publications

References 43 publications

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

Fabrication of superabsorbent nanofibers based on sodium polyacrylate/poly(vinyl alcohol) and their water absorption characteristics

The Chemistry of Porous Polymers: The Holey Grail

Porous, bicontinuous, and cationic polyelectrolyte obtained by high internal phase emulsion polymerization

Contact Info

Product

Resources

About