Alkyl bicarbamates supramolecular organogelators with effective selective gelation and high oil recovery from oil/water mixtures

Wang, Yongzhen; Wu, Songquan; Yan, Xingru; Ma, Tao; Shao, Lu; Liu, Yuyan; Guo, Zhanhu

doi:10.1016/j.chemosphere.2016.09.149

Cited by 25 publications

(15 citation statements)

References 33 publications

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“…Except 6‐PAM, all the gels shows similar microstructure, which possibly due to the similar kind of interactions for the gelator and sunflower oil. With the decrease in chain length, the number of spaces to hold the organic solvents (at MGC) is decreased and resulting in tight microstructures for the short chain gelators …”

Section: Resultsmentioning

confidence: 99%

“…Recently phase selective gels formed from the oil‐water mixture by direct powder gelators at room temperature was reported . The low molecular weight organogelators based on L‐phenylalanine, D‐/L‐arabinose based enantiomers, alkyl bicarbamates, C 2 ‐symmetric benzene, and N‐acetylglucosamine were utilized for an excellent phase selective gelation from biphasic mixture . There are only a few known types of PSOGs that can gel various type of solvents such as crude oils at room temperature, petrol, or other organic solvents at the hot condition.…”

Section: Introductionmentioning

confidence: 99%

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Phenoxy‐Alkyl Maleates as Phase‐Selective Organogelators for Gelation of Edible Oils

Kumar

Nayak

2018

Euro J Lipid Sci & Tech

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Phase selective gelation may solve environmental problems such as water pollution and fire accidents during oil storage, a major problem for aquatic bodies. The objective of this work is to synthesize a series of phenoxy‐alkyl maleates (n‐PAM) oleogelators with homologous alkyl chain lengths for efficient phase selective gelation. The n‐PAM molecules are found to form oleogel in various edible oils among which sunflower oil shows best gelation. The gelation behavior increases with an increase in alkyl chain length of the n‐PAM gelators as observed from their low minimum gelation concentration (MGC) values. Oleogels thermal stability is examine through tube inversion method and differential scanning calorimetry (DSC). The rheological studies suggest that the oleogel of sunflower oil is mechanically stable and show typical viscoelastic properties. The field emission scanning electron microscopy (FE‐SEM) study of the gels shows sheet‐like morphology. Furthermore, the n‐PAM gelators exhibit quick phase selective gelation of edible oils at low MGC. Both the edible oil and gelator are quantitatively regained from recovered oleogel by employing the vacuum distillation. It is believed that these n‐PAMs could aid in reducing the environmental impacts of oil spills. Practical Applications: The phenoxy‐alkyl maleates gelators present in the MS show gelation ability in various edible oils at low minimum gelation concentration. These molecules also form efficient phase selective gelation with edible oils. Both oil and gelator can be recovered through vacuum distillation and gelator can be reused multiple times. Thus, all these advantages strongly point that out their bright future, in particular in edible oil spill recovery, could aid in reducing the environmental impacts from oil spills. Herein, the synthesized phenoxy alkyl maleate derivatives are reported as separators of edible oil from the oil‐water biphasic mixture. Initially, the gelator is solubilized in the biphasic mixture by heating. Later, gelation ability is observed by tube inversion method. From the phase selective gel, oil and gelator are separated through a distillation method. The recovered gelator can be reused in oil recovery process. This application may find use in oil recovery from waste plant of edible oil industries.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phenoxy‐Alkyl Maleates as Phase‐Selective Organogelators for Gelation of Edible Oils

Kumar

Nayak

2018

Euro J Lipid Sci & Tech

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“…Notably, this system was able to absorb up to 166 times its own weight in hydrocarbons [139]. Similarly, an alkyl bicarbamate supramolecular gel by Wang et al (Figure 15) showed rapid (within 15 min) selective removal and the retention of oils from oil-water mixtures [140]. For a complete cycle of recovery, a xylitol-based organogelator by Raju et al (Figure 15) demonstrated not only the phase-selective gelation of oil products, but the recovery of oil from the gels as well [141].…”

Section: Special Topic Applications Of Supramolecular Gelsmentioning

confidence: 99%

Beyond Covalent Crosslinks: Applications of Supramolecular Gels

Christoff‐Tempesta

Lew

Ortony

2018

Gels

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Traditionally, gels have been defined by their covalently cross-linked polymer networks. Supramolecular gels challenge this framework by relying on non-covalent interactions for self-organization into hierarchical structures. This class of materials offers a variety of novel and exciting potential applications. This review draws together recent advances in supramolecular gels with an emphasis on their proposed uses as optoelectronic, energy, biomedical, and biological materials. Additional special topics reviewed include environmental remediation, participation in synthesis procedures, and other industrial uses. The examples presented here demonstrate unique benefits of supramolecular gels, including tunability, processability, and self-healing capability, enabling a new approach to solve engineering challenges.

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“…9 This thermoreversible property enabling gel-sol transitions of the gels has applications most likely in areas such as photonic materials, cosmetics, fuel engineering and water purication via oil spill recovery. 5,10,11 Self-assembly into nanosized brous structures is mainly driven by non-covalent forces between the layers of gelator molecules. These intermolecular interactions can be listed as hydrogen bonding, pi-stacking (in naphthalene, anthracene etc.…”

Section: Introductionmentioning

confidence: 99%

“…3 Interestingly, increasing the chain length in odd and even numbered units may inuence the gelation in a completely different manner. 3,11,12,22 For example, Sumiyoshi et al claim that as the central spacer length increases, the odd numbered systems lead to an improved gelation. In contrast, for even numbered systems longer central spacer lengths result in the loss of gelation ability.…”

Section: Introductionmentioning

confidence: 99%

Influence of odd–even effect and intermolecular interactions in 2D molecular layers of bisamide organogelators

et al. 2018

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Alkyl bicarbamates supramolecular organogelators with effective selective gelation and high oil recovery from oil/water mixtures

Cited by 25 publications

References 33 publications

Phenoxy‐Alkyl Maleates as Phase‐Selective Organogelators for Gelation of Edible Oils

Phenoxy‐Alkyl Maleates as Phase‐Selective Organogelators for Gelation of Edible Oils

Beyond Covalent Crosslinks: Applications of Supramolecular Gels

Influence of odd–even effect and intermolecular interactions in 2D molecular layers of bisamide organogelators

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