Designing the head group of CO2-triggered switchable surfactants

Scott, Lauren M; Robert, Tobias; Harjani, Jitendra R.; Jessop, Philip G.

doi:10.1039/c2ra01242a

Cited by 65 publications

(65 citation statements)

References 21 publications

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“…Amidines, which are stronger bases than amines but weaker than guanidines, 65 can be reversibly protonated and deprotonated in the presence of water by addition and removal of CO 2 (e.g. Amidines, which are stronger bases than amines but weaker than guanidines, 65 can be reversibly protonated and deprotonated in the presence of water by addition and removal of CO 2 (e.g.…”

Section: Co 2 -Switchable Functional Groupsmentioning

confidence: 99%

“…6 Reaction of amidines and amines with CO 2 and water to form bicarbonate salts. 65 The effect of the molecular structure of two CO 2 -switchable surfactants N 0 -dodecyl-N,N-dimethylacetamidinium bicarbonate, C 12 N, and N 0 -(2-(2-(dodecyloxy)ethoxy)ethyl-N,N-dimethylacetamidinium bicarbonate, C 12 E 2 N) on the coagulation and redispersion behaviour of polystyrene latexes was investigated in detail by the Jessop and Cunningham groups. 10 with permission from ACS publications.…”

Section: Co 2 -Switchable Functional Groupsmentioning

confidence: 99%

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CO₂-responsive polymeric materials: synthesis, self-assembly, and functional applications

2016

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CO2 is an ideal trigger for switchable or stimuli-responsive materials because it is benign, inexpensive, green, abundant, and does not accumulate in the system. Many different CO2-responsive materials including polymers, latexes, solvents, solutes, gels, surfactants, and catalysts have been prepared. This review focuses on the preparation, self-assembly, and functional applications of CO2-responsive polymers. Detailed discussion is provided on the synthesis of CO2-responsive polymers, in particular using reversible deactivation radical polymerization (RDRP), formerly known as controlled/living radical polymerization (CLRP), a powerful technique for the preparation of well-defined (co)polymers with precise control over molecular weight distribution, chain-end functional groups, and polymer architectural design. Self-assembly in aqueous dispersed media is highlighted as well as emerging potential applications.

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Section: Co 2 -Switchable Functional Groupsmentioning

confidence: 99%

Section: Co 2 -Switchable Functional Groupsmentioning

confidence: 99%

CO₂-responsive polymeric materials: synthesis, self-assembly, and functional applications

2016

Self Cite

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“…After treatment with CO 2 and sonication the active form of the switchable surfactant and the initiator was generated and allowed the redispersion of the particles. [80] Jessop and co-workers investigated different anionic surfactants for soil remediation, several of them including aromatic systems ((sodium 2-nitro-4-((octyloxy)carbonyl)phenolate, sodium 4-(octyloxy) benzoate, sodium laurate, Triton X-100 and SDS, Table 2, entry 30) as CO 2 -responsive surfactants. When the tertiary amines were used as a surfactant, the nanoparticles were destabilized by purging with inert gas at 60 °C or by increasing the pH value.…”

Section: Co 2 -Responsive Surfactantsmentioning

confidence: 99%

Functional Colloidal Stabilization

Bijlard

Wald

Crespy

et al. 2016

Adv Materials Inter

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acids), and protective agents. The unifying concept and key property of colloidal stabilizers is to provide a significant repulsion between the individual dispersed particles, making the heterophase system kinetically stable, which is typically accomplished via electrostatic or steric stabilization.Functional colloid stabilization provides additional features in addition to simple repulsion via physisorbed molecules. In fact, it is surprising that the majority of artificial heterophase systems have overlooked the simple and efficient possibility of spatially resolved chemical modification. The utilization of surface-active functional stabilizers is a fast and flexible method to obtain colloidal particles with strongly improved interaction properties. This functionalization has proved extremely material-and time-efficient. Due to the self-assembling ability of the stabilizers, the functional groups allow for an exact positioning of chemical and physical interaction sites directly in the surface region of the colloidal particle.The purpose of this review is to highlight functional colloidal stabilization as defined above. Our main focus concentrates on reactive systems, especially heterophase polymerization in oil-in-water (o/w) and water-in-oil (w/o) emulsions; a waterin-oil emulsion is regarded as an inverse emulsion. We differentiate between various types of surfactants which can either adsorb or react to the dispersed material with one segment, while the second part of the amphiphile stabilizes the dispersion. The stability of emulsions can be obtained by either low or high mole cular weight surfactants. Additionally, we distinguish between surfactants from so-called protective colloids of higher mole cular weight without significant self-aggregation properties. Throughout this review, the literature on functional colloidal stabilizers was revised and classified according to molecular weight, preparation technique, chemical structure, and stimuli-responsive behavior. Certain aspects such as inorganic/organic hybrids, or bioconjugates with sequence-defined structures such as peptides and nucleotides, are not in the scope of the present review and will only be briefly described when relevant.The review is structured as follows: we start with a brief summary of conventional low molecular weight (Section 2.1) and polymeric surfactants (Section 2.2) which typically lack of additional function besides the colloid stabilization. Only some of these also industrially used surfactants carry, for example, olefins or hydroxyl-groups embedded in their chemical structure, but do not have additional handles to the colloids. After this Surfactants can stabilize colloids in dispersion; however, also additional chemical or physical functions can be added by the surfactant chemistry to the colloid. This review covers functional colloid stabilization whereby supplementary features in addition to simple repulsion via physisorbed mole cules are described. The utilization of surface-active functional stabilizers as a fast and flexibl...

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“…To overcome this limitation, next-generation surfactants commonly known as switchable anionic surfactants (SAS) have been studied in the remediation of oilcontaminated sediment by washing (Ceschia et al, 2014). Switchable surfactants can be switched 'on and off' with triggers such as light, pH or redox reagents (Datwani et al, 2003;Dexter et al, 2006;Liu et al, 2006;Sakai et al, 1999;Scott et al, 2012). SASs triggered by CO 2 are promising candidates for sediment washing.…”

Section: Flotation and Washingmentioning

confidence: 99%

Remediation technologies for oil-contaminated sediments

Agarwal

Liu

2015

Marine Pollution Bulletin

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Designing the head group of CO2-triggered switchable surfactants

Cited by 65 publications

References 21 publications

CO₂-responsive polymeric materials: synthesis, self-assembly, and functional applications

CO₂-responsive polymeric materials: synthesis, self-assembly, and functional applications

Functional Colloidal Stabilization

Remediation technologies for oil-contaminated sediments

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Designing the head group of CO2-triggered switchable surfactants

Cited by 65 publications

References 21 publications

CO2-responsive polymeric materials: synthesis, self-assembly, and functional applications

CO2-responsive polymeric materials: synthesis, self-assembly, and functional applications

Functional Colloidal Stabilization

Remediation technologies for oil-contaminated sediments

Contact Info

Product

Resources

About

CO₂-responsive polymeric materials: synthesis, self-assembly, and functional applications

CO₂-responsive polymeric materials: synthesis, self-assembly, and functional applications