IR spectroscopic study of the adsorption of polyacrylamide on hematite

Samsonova, N. S.; Il'chenko, L.G.; Goldman, Max; Ni, Ling

doi:10.1007/bf00608823

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…The peak located at 1702 cm −1 is the typical carbonyl group of PAA [61]. For PAAm hydrogel, the peak at 1655 cm -1 and the shoulder at 1605 cm -1 are corresponding to the C=O vibrations of the amide group and the primary amine N-H deformation vibrations, respectively [62]. However, those peaks show redshift in the spectrum of EIPH, and the peak for hydroxide stretching mode and the ─NH stretching mode becomes wider in EIPH, compared with PAAm hydrogel, which indicates the formation of hydrogen bonding in the EIPH [63].…”

Section: Resultsmentioning

confidence: 98%

Micropatterned elastic ionic polyacrylamide hydrogel for low-voltage capacitive and organic thin-film transistor pressure sensors

et al. 2019

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Section: Resultsmentioning

confidence: 98%

Micropatterned elastic ionic polyacrylamide hydrogel for low-voltage capacitive and organic thin-film transistor pressure sensors

et al. 2019

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“…The PAM molecule reacts with Fe 3+ ions on the surface of hematite through the lone pair of electrons of nitrogen, forming coordination bonds. At the same time, it also forms strong intermolecular hydrogen bonds with the hydrogen atoms of OH − on the hydrated surface of hematite [101]. Hydrogen bonding is main driving force controlling polymer adsorption, which occurs between the electronegative C=O groups on polyacrylamide and the surface hydroxyl groups of proton-donating oxides, positive MOH 2+ and neutral MOH [102,103].…”

Section: The Interaction Between Guar Gum and Mineralsmentioning

confidence: 99%

Bonding Mechanism and Process Characteristics of Special Polymers Applied in Pelletizing Binders

Zhao

Zhou

et al. 2022

Coatings

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Pellet ore not only has excellent metallurgical and mechanical properties, but is also an important metallurgical raw material used to solve the problem of increasing depletion of global high-grade iron ore resources. Bentonite has long been widely used in pellet ore production, which is not only expensive but also causes serious metallurgical pollution. Organic binders can form stronger adhesion and cohesion with mineral particles inside the green pellets than capillary forces, which greatly improves the pelletizing rate and significantly increases the strength of green and dry pellets, and it becomes an indispensable alternative to bentonite because it volatilizes pyrolytically at high temperatures, leaving almost no inorganic contaminants inside the pellet ore. In order to let more pellet researchers fully understand the research status and pelletizing theory of organic binders, this review systematically summarizes seven common organic binders, and elaborates on their adhesion mechanism and process characteristics, so as to provide references for pellet researchers and readers to further prepare cost-effective pellet binders and improve advanced pelletizing technology.

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“…There are also some strong absorption peaks in the region between 1200 and 900 cm -1 . The starch peaks have shifted and appears at 3382, 571, 1352 and 1010 cm -1 indicating that starch molecules are adsorbed on BHQ surfaces [23][24][25][26][27].…”

Section: Ftir Studiesmentioning

confidence: 99%

Selective Flocculation of Banded Hematite Quartzite (BHQ) Ores

Panda¹

2011

TOMPJ

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The recovery of fine hematite particles from banded hematite quartzite (BHQ) ore with potato starch has been investigated using selective flocculation. Microscopic features, coupled with x-ray diffraction (XRD), and Fourier transforms infrared (FTIR) spectroscopic data provide evidences for adsorption of starch molecules on hematite surface. The starch molecules show good selectivity for hematite particles in the pH range of 8.5-9.5 and in the reagent concentration range of 20-40 mg/l. The Scanning electron microscope (SEM) studies show that flocs of hematite particles are larger and appear to be denser than that of quartz. Initial results with 1:1 hematite-quartz mixture indicated that it is possible to achieve an iron concentrate of 64.5% Fe with 92.0% of iron recovery from a feed of 34% Fe. However under optical conditions of pH and reagent concentration, the BHQ ore could be upgraded from an initial grade of 38.9% Fe to 57.2% Fe with 71% recovery. The overall results indicate that separation of very fine grained hematite present in the BHQ iron ore is feasible by selective flocculation.

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IR spectroscopic study of the adsorption of polyacrylamide on hematite

Cited by 8 publications

References 2 publications

Micropatterned elastic ionic polyacrylamide hydrogel for low-voltage capacitive and organic thin-film transistor pressure sensors

Micropatterned elastic ionic polyacrylamide hydrogel for low-voltage capacitive and organic thin-film transistor pressure sensors

Bonding Mechanism and Process Characteristics of Special Polymers Applied in Pelletizing Binders

Selective Flocculation of Banded Hematite Quartzite (BHQ) Ores

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