Mechanism of the Formation of Self-Organized Microstructures in Soft Functional Materials

Liu, Xiang Yang; Sawant, Prashant D.

doi:10.1002/1521-4095(20020318)14:6<421::aid-adma421>3.0.co;2-7

Cited by 158 publications

(185 citation statements)

References 27 publications

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“…Nanofibers which form self-organized fibrous networks in organogels are sometimes found to have a 3D crystalline order [15][16][17][18]21]. The formation of fibers, therefore, takes place in most cases via a crystallization process [15][16][17][18]21], including nucleation and growth [22][23][24][25][26][27][28][29][30][31][32].…”

Section: Thermodynamic Driving Forcementioning

confidence: 99%

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Gelation with Small Molecules: from Formation Mechanism to NanostructureArchitecture

Liu

2005

Topics in Current Chemistry

113

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The mechanism of fiber and fiber network formation of small molecular gelling agents is treated on the basis of a generic heterogeneous nucleation model. The formation of a crystallite fiber network can take place via the so-called crystallographic mismatch branching. At very low supersaturations, unbranched fibers form predominantly. As supersaturation increases, small-angle crystallographic mismatch branching occurs at the side face of growth fibers. At very high supersaturations, the so-called wide-angle crystallographic mismatch branching becomes kinetically favorable. Both give rise to the formation of fiber networks, but of different types. Controlling the branching of the nanofibers of small molecular gelatins allows us to achieve the micro/nanostructure architecture of networks having the desired rheological properties. In this regard, the engineering of supramolecular functional materials can be achieved by constructing and manipulating the micro/nanostructure in terms of a "branching creator", or by tuning processing conditions.

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Section: Thermodynamic Driving Forcementioning

confidence: 99%

“…Consequently, self-supporting supramolecular materials will be obtained [8][9][10][15][16][17][18][19][20][21]. In contrast, systems consisting of nonpermanent/or transient interconnecting (or entangled) fibers or needles can only form weak and viscous paste at low concentrations [6,7].…”

Section: Introductionmentioning

confidence: 99%

Gelation with Small Molecules: from Formation Mechanism to NanostructureArchitecture

Liu

2005

Topics in Current Chemistry

113

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“…[6,7,20] Parameters such as permeability coefficients and sorption isotherms describe the efficacy of these technologies, and must be related to material morphology for design and quality-control purposes. [4] The curvature and topological characteristics provided here constitute unambiguous metrics to which thermodynamic, transport, or mechanical properties can be directly related, and may be readily extended to multifunctional hybrid or self-organized materials containing particulate [32] or fibrillar [33] networks.…”

mentioning

confidence: 91%

Topological Similarity of Sponge-like Bicontinuous Morphologies Differing in Length Scale

et al. 2002

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Sponge‐like bicontinuous morphologies (see Figure and also cover) are ubiquitous in the physical and biological sciences, but are only qualitatively understood in terms of their structure. Here, 3D imaging techniques are used to explore the characteristics of such morphologies at the nanoscale, microscale, and macroscale. Comparison of local and global topology metrics provides quantitative evidence of similarities between these morphologies.

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“…Some LMOGs form crystalline fibers in the gel [5][6][7][8]. In such gels, spherulite network and fibrous network structures have been observed as microstructures of LMOGs [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Effects of Cooling Rates on Self-Assembling Structures of 12-Hydroxystearic Acid in an Ionic Liquid

Takeno

Kozuka

2017

Advances in Materials Science and Engineering

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We investigated effects of cooling rates on self-assembling structures and mechanical and electrochemical properties of 12-hydroxystearic acid (12-HSA) in an ionic liquid (IL), 1-allyl-3-butylimidazolium bis(trifluoromethanesulfonyl) imide ([ABIm][TFSI]). The mixture of 12-HSA with [ABIm][TFSI] had an upper critical solution temperature (UCST) above the solgel transition temperature, and the microstructure of the ionogel was significantly affected by cooling rates, where it was prepared. The twisted self-assembling structure was formed during a slow cooling process at a rate of 0.4 ∘ C/min, whereas spherical domains caused by the liquid-liquid phase separation and radiate fibrous structure were observed for the quenched gel. The real-time smallangle X-ray scattering (SAXS) measurements for the ionogel during a slow cooling process at a rate of 0.4 ∘ C/min presented three different (001) peaks arising from long spacings of 46.5, 42.4, and 39.7Å, which were also observed for SAXS curves of a neat 12-HSA. These results suggest that three polymorphic forms of 12-HSA are formed in the IL. The polymorphic form significantly affected the mechanical properties of the ionogel, whereas it did not affect the ionic conductivity. The ionic conductivity of the ionogel was close to that of a neat [ABIm][TFSI] irrespective of the polymorphic forms of 12-HSA.

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Mechanism of the Formation of Self-Organized Microstructures in Soft Functional Materials

Cited by 158 publications

References 27 publications

Gelation with Small Molecules: from Formation Mechanism to NanostructureArchitecture

Gelation with Small Molecules: from Formation Mechanism to NanostructureArchitecture

Topological Similarity of Sponge-like Bicontinuous Morphologies Differing in Length Scale

Effects of Cooling Rates on Self-Assembling Structures of 12-Hydroxystearic Acid in an Ionic Liquid

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