Switching the Inside and the Outside of Aggregates of Water-Soluble Block Copolymers with Double Thermoresponsivity

Arotçaréna, Michel; Heise, Bettina; Ishaya, Sultana; Laschewsky, André

doi:10.1021/ja012167d

Cited by 552 publications

(601 citation statements)

References 49 publications

(81 reference statements)

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“…Furthermore, the combination of hydrophilicity and tolerance to high ionic strength makes polyzwitterions attractive candidates for hydrogels or viscosity modifiers in aqueous media under extreme conditions, such as oil field applications. Interestingly, many polyzwitterions show an upper critical solution temperature (UCST) in aqueous media [19,[42][43][44][45][46][47][48]. This has been exploited in recent years for designing stimuli-responsive polymer systems [49][50][51] from polyzwitterions, being reversibly sensitive to changes in temperature, ionic strength, specific ion pairing, and chemical reactions, or, more rarely, to changes in pH (see Section 4.2).…”

Section: Scheme1 Simplistic Model Of Polyampholytes (Left) and Polyzmentioning

confidence: 99%

Structures and Synthesis of Zwitterionic Polymers

2014

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Abstract:The structures and synthesis of polyzwitterions ("polybetaines") are reviewed, emphasizing the literature of the past decade. Particular attention is given to the general challenges faced, and to successful strategies to obtain polymers with a true balance of permanent cationic and anionic groups, thus resulting in an overall zero charge. Also, the progress due to applying new methodologies from general polymer synthesis, such as controlled polymerization methods or the use of "click" chemical reactions is presented. Furthermore, the emerging topic of responsive ("smart") polyzwitterions is addressed. The considerations and critical discussions are illustrated by typical examples.

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Section: Scheme1 Simplistic Model Of Polyampholytes (Left) and Polyzmentioning

confidence: 99%

Structures and Synthesis of Zwitterionic Polymers

2014

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“…However, these polymers show a UCST either below 0 °C or above 100 °C. Also long known were the UCST behavior of some polybetaines (5-7) [30][31][32][33][34] and poly(acrylic acid) (PAAc, 8) [35,36] . It is important to note that due to the ionic nature of these polymers their UCST behavior is heavily affected by the addition of electrolytes.…”

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Polymers with Upper Critical Solution Temperature in Aqueous Solution

Seuring

Agarwal

2012

Macromol. Rapid Commun.

506

617

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This review focuses on polymers with upper critical solution temperature (UCST) in water or electrolyte solution and provides a detailed survey of the yet few existing examples. A guide for synthetic chemists for the design of novel UCST polymers is presented and possible handles to tune the phase transition temperature, sharpness of transition, hysteresis, and effectiveness of phase separation are discussed. This review tries to answer the question why polymers with UCST remained largely underrepresented in academic as well as applied research and what requirements have to be fulfilled to make these polymers suitable for the development of smart materials with a positive thermoresponse.

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“…[35][36][37][38][39][40][41][42] These materials typically contain both a permanently hydrophilic block as well as a "smart" block which is tunably hydrophilic/hydrophobic. Traditionally, these materials have been prepared using living polymerization methods including anionic, cationic, and group transfer polymerization.…”

Section: Introduction Smfp Type I Polymers ("Smart" Polymeric Surfactmentioning

confidence: 99%

"Smart" Multifunctional Polymers for Enhanced Oil Recovery

McCormick¹,

Lowe²

2007

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Recent recommendations made by the Department of Energy, in conjunction with ongoing research at the University of Southern Mississippi, have signified a need for the development of "smart" multi-functional polymers (SMFPs) for Enhanced Oil Recovery (EOR) processes. Herein we summarize research from the period of September 2003 through March 2007 focusing on both Type I and Type II SMFPs. We have demonstrated the synthesis and behavior of materials that can respond in situ to stimuli (ionic strength, pH, temperature, and shear stress). In particular, Type I SMFPs reversibly form micelles in water and have the potential to be utilized in applications that serve to lower interfacial tension at the oil/water interface, resulting in emulsification of oil. Type II SMFPs, which consist of high molecular weight polymers, have been synthesized and have prospective applications related to the modification of fluid viscosity during the recovery process. Through the utilization of these advanced "smart" polymers, the ability to recover more of the original oil in place and a larger portion of that by-passed or deemed "unrecoverable" by conventional chemical flooding should be possible. EXECUTIVE SUMMARYA coordinated, fundamental research program is underway in our laboratories with the ultimate goal of developing "smart" multi-functional polymers (SMFPs) that can respond in situ to stimuli (ionic strength, pH, temperature, and shear stress) resulting in significantly improved sweep efficiency in Enhanced Oil Recovery (EOR) processes. With these technologically "smart" polymers, it should be possible to produce more of the original oil in place and a larger portion of that by-passed or deemed "unrecoverable" by conventional chemical flooding. The specific objectives of this project are: a) to utilize recent break-through discoveries in the Polymer Science Laboratories at the University of Southern Mississippi to tailor polymers with the requisite structures and b) to evaluate the behavioral characteristics and performance of these multifunctional polymers under environmental conditions encountered in the petroleum reservoir. Two structural types of SMFPs are targeted that can work alone or in a concerted fashion in water-flooding processes. Type I SMFPs can reversibly form micelles, termed "polysoaps", in water that serve to lower interfacial tension at the oil/water interface, resulting in emulsification of oil. Type II SMFPs are high molecular weight polymers designed to alter fluid viscosity during the recovery process.Critical to the desired performance of these conceptual systems is the precise incorporation of selected functional monomers along the macromolecular backbone to serve as sensors or triggers activated by changes of the surrounding fluid environment. The placement of hydrophilic, hydrophobic, and triggerable monomers is accomplished by controlled free radical polymerization utilizing aqueous Reversible AdditionFragmentation chain Transfer (RAFT) polymerization, a technique under intensive developme...

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Switching the Inside and the Outside of Aggregates of Water-Soluble Block Copolymers with Double Thermoresponsivity

Cited by 552 publications

References 49 publications

Structures and Synthesis of Zwitterionic Polymers

Structures and Synthesis of Zwitterionic Polymers

Polymers with Upper Critical Solution Temperature in Aqueous Solution

"Smart" Multifunctional Polymers for Enhanced Oil Recovery

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