Surface activity of amphiphilic cationic pH-responsive poly(4-vinylpyridine) microgel at air/water interface

Şahiner, Nurettin; Atta, Ayman M.; Yasar, Alper O.; Al‐Lohedan, Hamad A.; Ezzat, Abdelrahman O.

doi:10.1016/j.colsurfa.2015.07.035

Cited by 20 publications

(9 citation statements)

References 49 publications

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“…where γ o is the water surface tension (72.1 mN•m −1 ). The higher π cmc value of QAP-Br more than AIL (Table 2) indicated that the QAP-Br interacted with water via a dipole-dipole interaction mechanism more than AIL [43,44]. agree with the cmc data to confirm that the presence of asphaltene in the chemical structure of AIL increases the hydrophobic interaction of QAP-Brand increases the micelle diameter (aggregation) and their positive charges due to presence of pyridinium cations [42].…”

Section: Surface Activity Of Amphiphilic Asphaltene Pilsupporting

confidence: 70%

“…The increasing of the Γ max value for AIL than QAP-Br (Table 2) indicates the higher adsorption of AIL at the air-water interface, which also reflects a reduction of the water surface tension. The increasing of the Γ max and lowering A min values could be explained on the basis that the interactions between the hydrophilic arms of the AIL molecules increased the packing of molecules at the interfaces [44]. The lower A min (0.033 nm 2 /molecule) of AIL suggested that its adsorption oriented away from the liquid in a more tilted position.…”

Section: Surface Activity Of Amphiphilic Asphaltene Pilmentioning

confidence: 99%

“…where γo is the water surface tension (72.1 mN•m −1 ). The higher πcmc value of QAP-Br more than AIL (Table 2) indicated that the QAP-Br interacted with water via a dipole-dipole interaction mechanism more than AIL [43,44]. The adsorption of QAP-Br and AIL molecules at the air-water interface was used to evaluate their surface activities.…”

Section: Surface Activity Of Amphiphilic Asphaltene Pilmentioning

confidence: 99%

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Synthesis and Application of New Amphiphilic Asphaltene Ionic Liquid Polymers to Demulsify Arabic Heavy Petroleum Crude Oil Emulsions

et al. 2020

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Asphaltenes are heavy petroleum crude oil components which limit the production of petroleum crude oil due to their aggregation and their stabilization for all petroleum crude oil water emulsions. The present study aimed to modify the chemical structures of isolated asphaltenes by converting them into amphiphilic polymers containing ionic liquid moieties (PILs) to demulsify the emulsion and replace the asphaltene layers surrounding the oil or water droplets in petroleum crude oil emulsions. The literature survey indicated that no modification occurred to produce the PILs from the asphaltenes. In this respect, the asphaltenes were modified via oxidation of the lower aliphatic chain through carboxylation followed by conversion to asphaltene acid chloride that reacted with ethoxylated N-alkyl pyridinium derivatives. Moreover, the carboxylation of asphaltenes was carried out through the Diels–Alder reaction with maleic anhydride that was linked with ethoxylated N-alkyl pyridinium derivatives to produce amphiphilic asphaltene PILs. The produced PILs from asphaltenes acid chloride and maleic anhydride were designated as AIL and AIL-2. The chemical structure and thermal stability of the polymeric asphaltene ionic liquids were evaluated. The modified structure of asphaltenes AIL and AIL-2 exhibited different thermal characteristics involving glass transition temperatures (Tg) at −68 °C and −45 °C, respectively. The new asphaltenes ionic liquids were adsorbed at the asphaltenes surfaces to demulsify the heavy petroleum crude emulsions. The demulsification data indicated that the mixing of AIL and AIL-2 100 at different ratios with ethoxylated N-alkyl pyridinium were demulsified with 100% of the water from different compositions of O:W emulsions 50:50, 90:10, and 10:90. The demulsification times for the 50:50, 90:10, and 10:90 O:W emulsions were 120, 120, and 60 min, respectively. The interaction of the PILs with asphaltene and mechanism of demulsification was also investigated.

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Section: Surface Activity Of Amphiphilic Asphaltene Pilsupporting

confidence: 70%

Section: Surface Activity Of Amphiphilic Asphaltene Pilmentioning

confidence: 99%

“…where γo is the water surface tension (72.1 mN•m −1 ). The higher πcmc value of QAP-Br more than AIL (Table 2) indicated that the QAP-Br interacted with water via a dipole-dipole interaction mechanism more than AIL [43,44]. The adsorption of QAP-Br and AIL molecules at the air-water interface was used to evaluate their surface activities.…”

Section: Surface Activity Of Amphiphilic Asphaltene Pilmentioning

confidence: 99%

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Synthesis and Application of New Amphiphilic Asphaltene Ionic Liquid Polymers to Demulsify Arabic Heavy Petroleum Crude Oil Emulsions

et al. 2020

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“…The dried p(HPMA-Cl) microgel was modified using with TAEA and PEI agents [25]. A certain amount (0.5 g) of dried-p(HPMA-Cl) microgel was dispersed in 10 mL DMF, and either 6.67 mmol TAEA or 2 mL PEI was added to this mixture [26].…”

Section: The Modification Of P(hpma-cl) Microgelsmentioning

confidence: 99%

“…After 24 h, the reaction mixtures were taken into room temperature and the modified p(HPMA)-TAEA and p(HPMA)-PEI microgels were collected by centrifugation (24680 rpm, 10 min, 25ºC). The prepared microgels were washed with DMF and ethanol and dried in an oven at 50ºC [25,27]. Characterization of the microgels.…”

Section: The Modification Of P(hpma-cl) Microgelsmentioning

confidence: 99%

Investigation of Thermal Behaviors of Poly(3-Chloro-2-Hydroxypropyl Methacrylate) modified with Amine-Rich Groups

Alparslan

2018

HJBC

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Efficient removal of methyl blue from aqueous solution by using poly(4-vinylpyridine)–graphene oxide–Fe3O4 magnetic nanocomposites

Wang

et al. 2019

J Mater Sci

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Surface activity of amphiphilic cationic pH-responsive poly(4-vinylpyridine) microgel at air/water interface

Cited by 20 publications

References 49 publications

Synthesis and Application of New Amphiphilic Asphaltene Ionic Liquid Polymers to Demulsify Arabic Heavy Petroleum Crude Oil Emulsions

Synthesis and Application of New Amphiphilic Asphaltene Ionic Liquid Polymers to Demulsify Arabic Heavy Petroleum Crude Oil Emulsions

Investigation of Thermal Behaviors of Poly(3-Chloro-2-Hydroxypropyl Methacrylate) modified with Amine-Rich Groups

Efficient removal of methyl blue from aqueous solution by using poly(4-vinylpyridine)–graphene oxide–Fe3O4 magnetic nanocomposites

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