Synthesis of magnetically responsive hyperbranched polyamidoamine based on the graphene oxide: Application as demulsifier for oil‐in‐water emulsions

Chen, Ying; Tian, Gongwei; Liang, Hongbao; Liang, Yuning

doi:10.1002/er.4614

Cited by 49 publications

(17 citation statements)

References 38 publications

(63 reference statements)

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“…After modification with APTES, the zeta potential of AT–NH 2 became positive and about 23.87 mV. This is due to the introduction of amino groups onto the AT surface, which were readily protonated and positively charged under acidic conditions . Such a reverse of the zeta potential confirmed that the 3-APTES molecules were successfully decorated on the surface of AT.…”

Section: Resultsmentioning

confidence: 79%

Preparation of Graphene Oxide/Attapulgite Composites and Their Demulsification Performance for Oil-in-Water Emulsion

Liu

Zhong

et al. 2021

Energy Fuels

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In this study, attapulgite (AT) and graphene oxide (GO) nanosheets were grafted together via a silane coupling agent to synthesize attapulgite−graphene oxide (AT−GO) composites and apply them to remove the emulsified oil from the oily wastewater. The structure and morphology of the AT−GO composites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction spectroscopy, zeta potential measurements, and transmission electron microscopy. The amphiphilicity of the AT−GO composites was evaluated by visual observation of their distribution in the oil−water mixture. The results showed that the AT−GO composites have been successively prepared and have good amphiphilic and interfacial activity. The effects of the pH, demulsifier dosage, temperature, and the mass ratio of AT and GO (R A/G ) in the composites on the demulsification performance of AT−GO were studied. It was found that the demulsification process could be completed efficiently and quickly at room temperature. Under optimal demulsification conditions, the demulsification efficiency is above 95%. The demulsification mechanism was studied and discussed. It is believed that the interaction behavior between the AT−GO material and the emulsified molecules of asphaltenes is a key for the demulsification. Once the nanoparticles are combined with the emulsified molecules, the external stirring, vibration, and other mechanical actions provide them enough kinetic energy to destroy the protective film at the oil/water interface and then promote the merging of dispersed oil droplets to realize the oil−water separation.

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Section: Resultsmentioning

confidence: 79%

Preparation of Graphene Oxide/Attapulgite Composites and Their Demulsification Performance for Oil-in-Water Emulsion

Liu

Zhong

et al. 2021

Energy Fuels

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“…The absolute value of zeta potential decreased with the increasing quaternization modification degree (see the PE‐R‐0.3 and PE‐R‐1.0 in Table 6), and after the addition of the product quaternizated by QA‐188, the absolute value of zeta potential was smaller than that of product quaternizated by CP (see the PE‐R‐0.3 and PE‐M‐0.3 in Table 6). When the absolute value of zeta potential of oil droplets decreases, the stability of oil droplets will decrease, and aggregation and coalescence of oil droplets are easy to happen, 38 which is helpful for the collision efficiency between bubbles and oil droplets. Therefore, the oil removal of product increased with the increasing quaternization modification degree, and the oil removal of product quaternizated by QA‐188 was higher.…”

Section: Resultsmentioning

confidence: 99%

The effect of molecular structure on the properties of cationic polyacrylate and its flocculation‐flotation performance of oilfield oily wastewater treatment

Zhang

Wang

et al. 2022

J of Applied Polymer Sci

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With the increasing amount of oily wastewater produced in the offshore oilfield, more efficient air flotation agent is needed to be developed. Cationic polyacrylate with amphiphilic structure has been found to be a type of potential efficient air flotation agent. However, the effect of molecular structure on its properties and performance was lack of research. In this paper, copolymers with tertiary amine as side group were synthesized by copolymerization of ethyl acrylate (EA) and tertiary amine monomers, and then a series of cationic polyacrylates were prepared by quaternization of tertiary amine with quaternization reagent.The effects of tertiary amine monomer type (including dimethylaminopropyl methacrylamide (DPM) and dimethylaminoethyl methacrylate (DEM)), quaternization reagent type (including 3-Chloro-1,2-Propanediol and 3-chloro-2-hydroxytrimethylammonium chloride) and quaternization degree on the cationic polyacrylate properties and its flotation performance were investigated. The experimental results showed that the flotation performance increased with the increasing hydrophilicity and cation degree of the hydrophilic unit in the cationic polyacrylate. When the tertiary amine monomer was DPM, quaternization reagent was 3-chloro-2-hydroxytrimethylammonium chloride, and theoretical quaternization degree was 100%, the oil removal of product PE-M-1.0 was the highest. When PE-M-1.0 dosage was 50 mg/L, gas flow was 1 L/min, flotation time was 10 min, its oil removal rate was higher than 95% in the range of 20-60 C. The results of zeta potential measurement and microfluidic experiment showed that PE-M-1.0 can increase the size of oil droplets by destroying the electric double layer on the surface of oil droplets and maintain the stability of bubbles, which was helpful for the improve of gas bubble-oil droplet collision probability and adhesion efficiency.

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“…The magnetic properties of Fe 3 O 4 /CMC/GO decreased with the addition of GO. However, the saturation magnetization was high enough to achieve the separation effect 44 …”

Section: Resultsmentioning

confidence: 99%

“…However, the saturation magnetization was high enough to achieve the separation effect. 44 3.2 | Effects of adsorption operation factors…”

Section: Sem Analysismentioning

confidence: 99%

Synthesis of magnetic carboxymethyl cellulose/graphene oxide nanocomposites for adsorption of copper from aqueous solution

et al. 2020

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Summary In this study, a green and high‐efficiency adsorbent was synthesized. First, magnetic cellulose (Fe3O4/CMC) was prepared by coprecipitation method and then it was compounded with functional graphene oxide (GO) to prepare magnetic cellulose‐supported GO composite (Fe3O4/CMC/GO). As prepared composite was characterized by Fourier transform infrared spectroscopy, X‐ray diffractometer, thermogravimetric, scanning electron microscope, Brunner‐Emmett‐Teller, and vibrating sample magnetometer. The adsorption properties were studied, and the effects of time, temperature, pH, and initial concentration on the adsorption process were investigated. The adsorption mechanism was also discussed. The results showed that the pseudo‐second‐order kinetic model and the Langmuir model were more consistent with the adsorption process of Cu2+ by adsorbents. The whole adsorption process was a spontaneous endothermic process, and the adsorption capacity reached the maximum (199.98 mg·g−1) when the pH was 6 to 7, the initial concentration was 200 mg·L−1, and the temperature was 318 K. The high adsorption rate (86.68%) can still be achieved after 5 cycles of adsorption‐desorption with 1 mol·L−1 dilute hydrochloric acid as eluent.

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Synthesis of magnetically responsive hyperbranched polyamidoamine based on the graphene oxide: Application as demulsifier for oil‐in‐water emulsions

Cited by 49 publications

References 38 publications

Preparation of Graphene Oxide/Attapulgite Composites and Their Demulsification Performance for Oil-in-Water Emulsion

Preparation of Graphene Oxide/Attapulgite Composites and Their Demulsification Performance for Oil-in-Water Emulsion

The effect of molecular structure on the properties of cationic polyacrylate and its flocculation‐flotation performance of oilfield oily wastewater treatment

Synthesis of magnetic carboxymethyl cellulose/graphene oxide nanocomposites for adsorption of copper from aqueous solution

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