Liquid‐Crystalline Biomacromolecular Templates for the Formation of Oriented Thin‐Film Hybrids Composed of Ordered Chitin and Alkaline‐Earth Carbonate

Nishimura, Tatsuya; Toyoda, Kohei; Ito, Takahiro; Oaki, Yuya; Namatame, Yukiko; Kato, Takashi

doi:10.1002/asia.201500462

Cited by 10 publications

(9 citation statements)

References 54 publications

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“…As mentioned earlier, heating the LCE sample causes a rotation of the LC domains and lead to the elongation of the sample with the help of stretch (the model maybe like Fig. (b) in which the mesogenic unit is perpendicular to the stretching direction after orientation, the mesogenic unit can also all parallel to the stretching direction) . The XRD experiment can confirm the mechanism of deformation [Fig.…”

Section: Resultsmentioning

confidence: 94%

Shape recovery liquid crystal elastomer synthesized by melt‐polycondensation

Zhang

2016

J. Polym. Sci. Part A: Polym. Chem.

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A novel liquid crystal elastomer (LCE) synthesized by melt polymerization, which exhibits the capacity of shape memory, is reported here for the first time. The method of synthesize the shape memory LCE has been explored. A facile two-step method to synthesize these anisotropic materials to realize reversible shape change behavior is reported. The first reaction is the addition of nematic liquid crystal molecules to form a kind of liquid crystal polymer. Subsequently, the polymer is crosslinked to trap the order of the liquid crystal into a crosslinked LCE. The LCE exhibits liquid crystalline behavior which has shape memory with excellent fixity and recovery. Its shape memory and actuating properties also have been studied. When reheating the LCE to 165 8C, the shape will recover. The main chains and crosslinked bonds of the LCE contain ester groups, which are sensitive to alkaline and acidic condition. It turns out that the LCE is intact under acidic condition, but it can be degraded under alkaline condition.

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Section: Resultsmentioning

confidence: 94%

Shape recovery liquid crystal elastomer synthesized by melt‐polycondensation

Zhang

2016

J. Polym. Sci. Part A: Polym. Chem.

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“…The use of ordered templates, such as, aqueous lyotropic LC templates and solids preserving LC order, impacts the crystallization of inorganic substances by tuning ion‐diffusion pathways, as well as, the anisotropic interactions between resource ions and LC templates. [ 120–128 ] Biomacromolecules such as, collagen, chitin, and cellulose are used in lyotropic LC templates because they interact with ions for biominerals and exhibit LC phases in aqueous media. The crystallization of CaCO 3 , SrCO 3 , and calcium phosphate in biomacromolecular LC templates provides hybrid materials with biomineral mimetic ordered structures.…”

Section: Liquid Crystals For Water and Energymentioning

confidence: 99%

“…The crystallization of CaCO 3 , SrCO 3 , and calcium phosphate in biomacromolecular LC templates provides hybrid materials with biomineral mimetic ordered structures. [ 122–128 ] Collagen provides lamellar scaffolds for calcium phosphate crystallization. Calcium phosphate is crystallized between fibril collagens with lamellar structures by soaking collagen fibrils into precursor aqueous solutions of polyelectrolyte and amorphous calcium phosphate, leading to the development of environmentally friendly hybrid materials with hierarchical lamellar structures.…”

Section: Liquid Crystals For Water and Energymentioning

confidence: 99%

Advanced Functional Liquid Crystals

et al. 2022

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Liquid crystals have been intensively studied as functional materials. Recently, integration of various disciplines has led to new directions in the design of functional liquid‐crystalline materials in the fields of energy, water, photonics, actuation, sensing, and biotechnology. Here, recent advances in functional liquid crystals based on polymers, supramolecular complexes, gels, colloids, and inorganic‐based hybrids are reviewed, from design strategies to functionalization of these materials and interfaces. New insights into liquid crystals provided by significant progress in advanced measurements and computational simulations, which enhance new design and functionalization of liquid‐crystalline materials, are also discussed.

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“…Alternatively, deposition on an underneath template including Langmuir membranes, 16−18 self-assembled monolayers, 19−21 semicrystalline polymers, 22−27 and crystalline facets 28−30 provides various robust approaches to orientational control in lateral and/or vertical directions. Among various matrices, uniaxial semicrystalline polymers (SCPs) obtained via stretching 26,31,32 or rubbing 22,33,34 have long been used extensively to template crystallization to realize three-dimensional (3D)-oriented thin films across the macroscopic distance. 32 Nevertheless, both above-mentioned approaches meet the difficulty in treating cellulose and chitintwo abundant biopolymers with poor processability, unless their soluble derivatives were employed for processing.…”

Section: ■ Introductionmentioning

confidence: 99%

Design of Heterogeneous Nuclei for Lateral Crystallization via Uniaxial Assembly of Cellulose Nanocrystals

Lu¹,

Qi²,

Zhang³

et al. 2016

Crystal Growth & Design

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Semicrystalline polymers (SCPs) represent a group of cheap heterogeneous nuclei for crystallization. Nevertheless, cellulose, the most abundant biogenic SCP, is notorious for its poor processability. This limits its application as the orientational guiding agent in crystallization of functional compounds. Different from current polymer engineering approaches to uniaxial SCP thin films, we explored a novel approach to the uniaxial cellulose thin film via the oriented assembly of cellulose nanocrystals (CNCs) by means of a simple dip-coating technique. This thin film successfully guides the lateral crystallization of two drug compounds, which in turn reflects the uniformity of the uniaxial CNC alignment on the macroscopic scale. Furthermore, unlike traditional SCP thin films, the assembly route driven by different external forces can lead to CNC thin films with distinct orientational characters for fabrication of patterned drug thin films. The emerging colloidal assembly route to a uniaxial SCP substrate leads to unprecedented access to design heterogeneous nuclei for oriented crystallization of functional hybrids.

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Liquid‐Crystalline Biomacromolecular Templates for the Formation of Oriented Thin‐Film Hybrids Composed of Ordered Chitin and Alkaline‐Earth Carbonate

Cited by 10 publications

References 54 publications

Shape recovery liquid crystal elastomer synthesized by melt‐polycondensation

Shape recovery liquid crystal elastomer synthesized by melt‐polycondensation

Advanced Functional Liquid Crystals

Design of Heterogeneous Nuclei for Lateral Crystallization via Uniaxial Assembly of Cellulose Nanocrystals

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