Dynamic covalent chemistry is a powerful tool for the construction of adaptive and stimulus-responsive nanosystems. Here we report on the spontaneous formation of dynamic covalent wormlike micelles from imine-based gemini surfactants, formed upon mixing aqueous solutions of two complementary non-surface-active precursors. Resulting from the reversibility of the dynamic covalent imine bond, the wormlike micelles can be switched between an isotropic solution and the assembled state, triggered by pH and temperature. Thermodynamic modeling of the reaction equilibria shows that, although mixtures of single- and double-tailed surfactants are formed, it is mainly the double-tailed surfactant that assembles into the wormlike micelles.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/la302294r | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhancing Environment Resistance and Bioactivity of Pesticide Enabled by Structure-Controllable Polymer Nanocarriers: Emphasizing the Role of Morphology.
Small
December 2024
Department of Chemistry, Xihua University, Chengdu, 610039, China.
Nano-formulated pesticides are increasingly desired to control the insect pest and plant disease with superior efficacy for guaranteeing the high yield and quality in crop production. However, the impact of nanocarrier morphology on pesticide resistance against rainwash, photolysis, and overall pesticide bioactivity remains unknown. In this work, a series of well-defined and morphology-controllable polymer nanocarriers for pesticide are fabricated through polymerization-induced self-assembly.
View Article and Find Full Text PDFWorm-like Micelle Formation of Sugar-Based Nonionic Surfactant with Multibranched Methyl Chains.
Langmuir
December 2024
Department of Chemistry, Faculty of Science, Nara Women's University, Kitauoyanishi-machi, Nara 630-8506, Japan.
The aggregation properties of sugar-based surfactants with methyl groups at multiple positions on the linear alkyl chain are an understudied topic. Therefore, in this study, we performed a structural analysis of aggregates formed by two types of sugar-based nonionic surfactants with multibranched methyl chains, 3,7,11-trimethyldodecyl maltoside (CMal), as well as with a linear chain, dodecyl--d-maltoside (CMal), in aqueous solutions using rheological and small-angle X-ray scattering techniques. CMal showed an excellent performance in lowering surface tension (28.
View Article and Find Full Text PDFCell-Penetrating Peptide Induced Superstructures Triggering Highly Efficient Antibacterial Activity.
Adv Mater
November 2024
Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
To endow non-antibacterial molecules with highly efficient bactericide activity is an important but challenging issue. Herein, a kind of cell-penetrating peptide octa-arginine (R8) is found to be effective in activating antibacterial ability when assembling with anionic surfactant sodium dodecyl sulfate (SDS), while individual R8 or SDS shows poor or no antibacterial ability. By combined electrostatic, hydrogen bond, and hydrophobic interactions, R8 and SDS associate into wormlike micelle and lamellar structure by forming supramolecular self-assembling units, depending on their charge ratio (CR).
View Article and Find Full Text PDFInteractions Between Cationic Micellar Solution and Aromatic Hydrotropes with Subtle Structural Variations.
Molecules
November 2024
School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.
Wormlike micelles (WLMs) with tunable viscoelastic characteristics have emerged as indispensable smart materials with a wide range of applications, which have garnered intense interest over the past few decades. However, quantitatively predicting the effect of various hydrotropes on the rheological behaviors of WLMs remains a challenge. In this article, micelles were formed in a mixture of 3-hexadecyloxy-2-hydroxypropyltrimethylammonium bromide (RHTAB) and aromatic hydrotropes (e.
View Article and Find Full Text PDFMicrorheology of gemini surfactants at interfaces and in solutions in the dilute and semidilute regimes.
Soft Matter
November 2024
Laboratoire Charles Coulomb (L2C), University of Montpellier, CNRS, Montpellier, France.
Gemini surfactants are ideal systems to study a wide range of rheological behaviours in soft matter, showing fascinating analogies with living polymers and polyelectrolytes. By only changing the concentration, the shear viscosity can vary by 7 orders of magnitude in the bulk when transitioning through the semidilute regime. In order to elucidate on the intrinsic shear viscosity profile at the interface in soft matter systems manifesting various concentration regimes and morphological transitions, we performed microrheology and adsorption experiments under a wide range of experimental conditions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!