New insights into the self-assembling of some hydrophobically modified polyacrylates in aqueous solution

Aricov, Ludmila; Băran, Adriana; Simion, Elena Livia; Gîfu, Ioana Cătălina; Anghel, Dan F.; Jerca, Valentin Victor; Vuluga, Dumitru Mircea

doi:10.1007/s00396-015-3825-z

Cited by 21 publications

(22 citation statements)

References 62 publications

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“…Hydrophobically modified sodium polyacrylates, PAC n Na (n = 18), were obtained in our laboratory, according to the procedure reported in a previous study [22].…”

Section: Methodsmentioning

confidence: 99%

“…The hydrophobically modified polymer PAC 18 Na used for the fabrication of multilayer films was prepared according to the synthesis previously reported, together with the characterization of the prepared polymers [22]. The polymer-surfactant complexes PAC 18 Na-C x TAB (x = 10, 12, 14 and 18) were prepared according to our previous study [20], and the aqueous PAC 18 Na solution was added to a C x TAB micellar solution under continuous stirring.…”

Section: Preparation Of Hydrophobically Modified Poly(acrylate)-surfamentioning

confidence: 99%

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Antimicrobial Activities of Hydrophobically Modified Poly(Acrylate) Films and Their Complexes with Different Chain Length Cationic Surfactants

et al. 2019

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Multilayer films from hydrophobically modified poly(acrylic acid) (HMPA) and their complexes with cationic surfactants were successfully prepared using the layer-by-layer (LbL) method. Alkyl trimethylammonium bromide derivatives with various lengths of the hydrophobic chain (C10–C18) were used to interact with the HMPA polymer, generating highly hydrophobic domains in the films and contributing to the antimicrobial properties of the prepared coating. The antimicrobial efficiency against common pathogens such as Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans was investigated in relationship with the morphology and composition of the thin films. The wettability and roughness of the multilayered systems were evaluated using atomic force microscopy (AFM) and contact angle measurements. The effects of the microbial exposure on the surface properties of the prepared films were investigated in order to assess the stability of the HMPA-deposited multilayers and the durability of the antimicrobial activity. The hydrophobically modified films exhibited antimicrobial activity against the studied pathogens. The best efficiency was registered in the case of S. aureus, which showed an inhibition of growth up to 100% after 2 h. C. albicans proved to be less sensitive to the effect of the multilayers deposited from HMPA–surfactant complexes. These results suggest that HMPA and HMPA–surfactant complex LbL multilayer films can be used as promising materials in antimicrobial surface coatings with increased resistance to pathogens during exposure.

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“…Hydrophobically modified sodium polyacrylates, PAC n Na (n = 18), were obtained in our laboratory, according to the procedure reported in a previous study [22].…”

Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Hydrophobically Modified Poly(acrylate)-surfamentioning

confidence: 99%

Antimicrobial Activities of Hydrophobically Modified Poly(Acrylate) Films and Their Complexes with Different Chain Length Cationic Surfactants

et al. 2019

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“…[68] For example, I 1 /I 3 � 1.38 for polysoap (poly[sodium N-(11acrylamidoundecanoyl)-L-alaninate]), [71] I 1 /I 3 � 1.05-1.12 for PSb-PANa diblock copolymers, [72] I 1 /I 3 � 1.2 for Tetronic 908, [73] I 1 /I 3 � 1.3 for Pluronic P85, [74] I 1 /I 3 � 0.9-1.2 for hydrophobically modified polyacrylates. [75] That is very similar to the micellar environment [76] of ionic detergents (sodium laurate, 1.042; sodium laurylsulfate, 1.136) and nonionic detergents (Triton-X-100, 1.30). Polymers with I 1 /I 3 value close to 1.8 and greater were reported in literature.…”

Section: Monomer C M [M]mentioning

confidence: 71%

Self‐Assembled Quaternary Ammonium‐Containing Comb‐Like Polyelectrolytes for the Hydrolysis of Organophosphorous Esters: Effect of Head Groups and Counter‐Ions

et al. 2020

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The aim of this work was to increase the efficiency of catalytic systems for the hydrolytic cleavage of 4‐nitrophenyl esters of phosphonic acids. Quaternary ammonium‐containing comb‐like polyelectrolytes («polymerized micelles») with ester cleavable fragments and a low aggregation threshold were used as catalysts. The synthesis of poly(11‐acryloyloxyundecylammonium) surfactants with different counterions (Br−, NO3−, CH3C6H4SO3−) and head groups was realized by micellar free‐radical polymerization. Molecular weight, critical association concentration, particle sizes and solubilization properties toward Orange OT were determined. Self‐assemblies organized by poly(11‐acryloyloxyundecyltrimethyl ammonium) bromide successfully catalyze the hydrolysis of 4‐nitrophenyl butylchloromethylphosphonate up to two orders of magnitude compared to aqueous alkaline hydrolysis. The development of these catalysts is promising for industrial applications and organophosphorus compound detoxification.

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“…The former includes the random and continuous block distribution of hydrophobic groups in the main chain and the end of hydrophilic barrier. Hydrophobic modified polyacrylamide polymer (HMPAM) is a typical representative of this type of polymer [15][16][17]. The latter mainly includes 'star' polymers with hydrophobic groups attached to one or both ends of the hydrophilic main chain and one hydrophobic group connected to multiple hydrophilic main chains [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

The seepage flow characteristics of hydrophobically associated polymers with different aggregation behaviours in porous media

Shi

Zhu

et al. 2020

R. Soc. open sci.

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The polymer solution for oil displacement is subjected to strong shear action in practical application, and this action will affect its percolation characteristics in porous media. The effects of mechanical shearing on the solution properties and seepage characteristics of modified hydrophobically associated polymers and dendrimers with two different aggregation behaviours were studied. The results showed that mechanical shearing did not affect hydrophobic microzones. Polymers can re-associate to restore part of the network structure, thereby improving shear resistance (dendritic hydrophobically associating polymers > hydrophobically modified partially hydrolysed polyacrylamide). Polymers with ‘cluster’ aggregation behaviour enhanced solution performance, enabling them to establish higher resistance coefficient (RF) and residual resistance factor (RRF) in porous media but also bringing about injection difficulties. Increasing the injection rate would increase the injection pressure, but the established RF and RRF showed a downward trend. Mechanical shear pretreatment effectively improved the injectability of the polymer. To achieve polymer injection and flow control, pre-shearing polymer solution and low-speed injection can be used in field applications.

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New insights into the self-assembling of some hydrophobically modified polyacrylates in aqueous solution

Cited by 21 publications

References 62 publications

Antimicrobial Activities of Hydrophobically Modified Poly(Acrylate) Films and Their Complexes with Different Chain Length Cationic Surfactants

Antimicrobial Activities of Hydrophobically Modified Poly(Acrylate) Films and Their Complexes with Different Chain Length Cationic Surfactants

Self‐Assembled Quaternary Ammonium‐Containing Comb‐Like Polyelectrolytes for the Hydrolysis of Organophosphorous Esters: Effect of Head Groups and Counter‐Ions

The seepage flow characteristics of hydrophobically associated polymers with different aggregation behaviours in porous media

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