Molecular structure of maltoside surfactants controls micelle formation and rheological behavior

Larsson, Johan; Sanchez-Fernandez, Adrian; Leung, Anna E.; Schweins, Ralf; Wu, Baohu; Nylander, Tommy; Ulvenlund, Stefan; Wahlgren, Marie

doi:10.1016/j.jcis.2020.08.116

Cited by 15 publications

(45 citation statements)

References 39 publications

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“…These observations agree with previous structural investigations that showed the formation of one-dimensional (1D) micelles for these surfactants. 12 , 15 However, the consistently higher values of β obtained may suggest that some relaxation mechanisms associated to 1D semiflexible objects are suppressed, for instance, through topological restraints due to excluded volume effects. The main differences between the fitted β values for the three surfactants are observed at low q (0.70 ± 0.05 for α-C 16 G 2 , 0.72 ± 0.07 for β-C 16 G 2 , and 0.81 ± 0.04 for β-C 16-1 G 2 between 0.0143 and 0.0268 Å –1 ), while at high q , these are relatively similar (0.88 ± 0.04 for α-C 16 G 2 , 0.88 ± 0.06 for β-C 16 G 2 , and 0.86 ± 0.05 for β-C 16-1 G 2 between 0.0836 and 0.166 Å –1 ).…”

Section: Resultsmentioning

confidence: 92%

“…This agrees with the SANS characterization as the β-C 16-1 G 2 micelles were previously observed to be more flexible (i.e., shorter persistence length, see Table 1 ) than those of the saturated analogues, thus showing faster dynamics in the segmental domain. 12 , 15 Also, extensional rheology revealed that β-C 16-1 G 2 forms longer capillary columns than the saturated analogue β-C 16 G 2 when a sample is gradually separated between two plates. 12 This elongational flow has also been related to the presence of more flexible 1D macromolecules.…”

Section: Resultsmentioning

confidence: 99%

“…In the length scale probed by the DLS experiment (>2000 Å) and as expected from the micellar shape, the α-C 16 G 2 dynamics relate to the translational diffusion of the micelles. 15 For the systems forming WLM, the cooperative diffusion is faster than the translational diffusion of α-C 16 G 2 . This increase of the cooperative diffusion in the entanglement regime is a known phenomenon and is related to the increase in compressibility.…”

Section: Resultsmentioning

confidence: 99%

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Topological Dynamics of Micelles Formed by Geometrically Varied Surfactants

et al. 2022

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The molecular architecture of sugar-based surfactants strongly affects their self-assembled structure, i.e., the type of micelles they form, which in turn controls both the dynamics and rheological properties of the system. Here, we report the segmental and mesoscopic structure and dynamics of a series of C16 maltosides with differences in the anomeric configuration and degree of tail unsaturation. Neutron spin-echo measurements showed that the segmental dynamics can be modeled as a one-dimensional array of segments where the dynamics increase with inefficient monomer packing. The network dynamics as characterized by dynamic light scattering show different relaxation modes that can be associated with the micelle structure. Hindered dynamics are observed for arrested networks of worm-like micelles, connected to their shear-thinning rheology, while nonentangled diffusing rods relate to Newtonian rheological behavior. While the design of novel surfactants with controlled properties poses a challenge for synthetic chemistry, we demonstrate how simple variations in the monomer structure can significantly influence the behavior of surfactants.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Topological Dynamics of Micelles Formed by Geometrically Varied Surfactants

et al. 2022

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“…The relationship between ln η and the reciprocal of temperature 1/T was drawn to extract the value of ∆H from the slope. The change in the enthalpy sign indicates that the micellization process is exothermic [29,32], and a negative ∆G˚ value is noted, indicating that the process is spontaneous, And the ˚∆S is negative because the micellization process is random [30] (Table 3).…”

Section: Resultsmentioning

confidence: 99%

Studying the effect of gold nanoparticles on mixture of surfactant of sodium dodecyl benzene sulfonate (SDBS) surfactant and folic acid

Alwan

Jebur

2021

Egypt. J. Chem.

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Gold nanoparticles were prepared from yeast dough via gold salt reduction and their effect on rheology of a mixture of folic acid and the surfactant of sodium dodecyl benzene sulfonate (SDBS) was studied. The results revealed that the highest viscosity (pa. s7.1232×10 2 ) was at a ratio of 2/8, a temperature of 10 o C and a concentration of 0.00004M of nano-gold. So, micelles growth is occurred by increasing nano-gold concentration. In the same manner, measuring the conductivity of the prepared solution revealed that there is a reverse proportion between conductivity and viscosity. Also, thermodynamic functions were calculated such as standard free energy (ΔGº), standard enthalpy (ΔH) and standard entropy (ΔSº) for the formed micelles together with calculating the micellization activation energy. Gold nanoparticles were prepared from yeast dough (Saccharomyces cerevisiae), via gold salt reduction, and the prepared nanoparticles were diagnosed by several techniques (UV-Vis.,x-ray, TEM, SEM), through which the results showed that the prepared gold particles have a purple colour at length (552nm) it has a spherical shape and is within the nano size that was specified by the Shearer equation. The effect of these prepared nanoparticles on the rheology of the mixture of folic acid and the surfactant of Sodium Dodecyl Benzene sulfonate was studied using different temperatures, as this study showed that the highest viscosity Its value was (pa. s7.1232×10 2) at the ratio (2/8) and at a temperature of 10C o and when the concentration of nano-gold was 0.00004M. If these results indicate that the growth of micelles increases with the increase in the concentration of the prepared nano-gold. The conductivity measurement of the solutions prepared for the mixture was also studied, as it was found that the conductivity increases as the viscosity decreases in the presence of nano-gold particles, which leads to an increase in the growth of micelles. From calculating the thermodynamic functions, it was found that the standard free energy (ΔGº) is negative, the standard enthalpy (ΔH) is negative and the standard entropy (ΔSº) is negative for the formed micelles.

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“…Micelles are formed by self-assembly of amphiphilic molecules including surfactants, polymers, and copolymers in an aqueous system through the hydrophobic effect. Micelles often present as a spherical structure less than 100 nm in diameter because the least amount of energy is needed ( Lu et al, 2018 ; Larsson et al, 2021 ). The structure of micelles contains a hydrophobic core and a hydrophilic shell to carry lipophilic drugs in the core and hydrophilic drugs in the shell, which is suitable for drug administration.…”

Section: Nanoparticlesmentioning

confidence: 99%

Transdermal Delivery of Therapeutic Compounds With Nanotechnological Approaches in Psoriasis

Qin

Dai

et al. 2022

Front. Bioeng. Biotechnol.

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Psoriasis is a chronic, immune-mediated skin disorder involving hyperproliferation of the keratinocytes in the epidermis. As complex as its pathophysiology, the optimal treatment for psoriasis remains unsatisfactorily addressed. Though systemic administration of biological agents has made an impressive stride in moderate-to-severe psoriasis, a considerable portion of psoriatic conditions were left unresolved, mainly due to adverse effects from systemic drug administration or insufficient drug delivery across a highly packed stratum corneum via topical therapies. Along with the advances in nanotechnologies, the incorporation of nanomaterials as topical drug carriers opens an obvious prospect for the development of antipsoriatic topicals. Hence, this review aims to distinguish the benefits and weaknesses of individual nanostructures when applied as topical antipsoriatics in preclinical psoriatic models. In view of specific features of each nanostructure, we propose that a proper combination of distinctive nanomaterials according to the physicochemical properties of loaded drugs and clinical features of psoriatic patients is becoming a promising option that potentially drives the translation of nanomaterials from bench to bedside with improved transdermal drug delivery and consequently therapeutic effects.

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Molecular structure of maltoside surfactants controls micelle formation and rheological behavior

Cited by 15 publications

References 39 publications

Topological Dynamics of Micelles Formed by Geometrically Varied Surfactants

Topological Dynamics of Micelles Formed by Geometrically Varied Surfactants

Studying the effect of gold nanoparticles on mixture of surfactant of sodium dodecyl benzene sulfonate (SDBS) surfactant and folic acid

Transdermal Delivery of Therapeutic Compounds With Nanotechnological Approaches in Psoriasis

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