Kohzo Ito
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View article: Discovery of the Marine Biodegradability of Nylon 6 and Nylon 6,6 Copolymer Fishing Lines
Discovery of the Marine Biodegradability of Nylon 6 and Nylon 6,6 Copolymer Fishing Lines Open
Microplastics in the marine environment have emerged as a pressing global issue. Fishing lines pose a particularly formidable challenge, as their resistance to biodegradation in seawater has led to significant harm to marine turtles, seabi…
View article: Strain-Induced Orientation of Host Rings that Determines the Sliding of Guest Polymers and Plasticity of Glassy Polyrotaxane
Strain-Induced Orientation of Host Rings that Determines the Sliding of Guest Polymers and Plasticity of Glassy Polyrotaxane Open
The unique motility of mechanically interlocked polymers enables their mechanical properties to profoundly transform. This property has been exploited less in glassy materials than in rubbery materials. This study demonstrated that in the …
View article: Composites with aligned and plasma-surface-modified graphene nanoplatelets and high dielectric constants
Composites with aligned and plasma-surface-modified graphene nanoplatelets and high dielectric constants Open
We have developed a method for designing polymer and graphene nanoplatelet (GNP) composites that show high dielectric constants over a wide range of GNP contents. GNPs are dispersed in the composites through plasma-surface modification and…
View article: Mechanical properties of polymer networks with polyrotaxane crosslinkers with different molecular structures based on polyethylene glycol and α-cyclodextrin
Mechanical properties of polymer networks with polyrotaxane crosslinkers with different molecular structures based on polyethylene glycol and α-cyclodextrin Open
The modification of vinyl groups on polyrotaxane derivatives, obtained with polyethylene glycol as the axial molecule and α-cyclodextrin as the cyclic molecule, allows the production of crosslinkers that react with various monomers, facili…
View article: Strain-induced crystallization and phase separation used for fabricating a tough and stiff slide-ring solid polymer electrolyte
Strain-induced crystallization and phase separation used for fabricating a tough and stiff slide-ring solid polymer electrolyte Open
The demand for mechanically robust polymer-based electrolytes is increasing for applications to wearable devices. Young’s modulus and breaking energy are essential parameters for describing the mechanical reliability of electrolytes. The f…
View article: Environmentally Friendly Sustainable Thermoset Vitrimer-Containing Polyrotaxane
Environmentally Friendly Sustainable Thermoset Vitrimer-Containing Polyrotaxane Open
Durable green plastics with extended lifespans have self-healing properties and shape memory and are chemically recyclable and marine biodegradable. These plastics are attracting attention in applications such as adhesives and carbon fiber…
View article: Negative interfacial energies of dynamic polymer brush interfaces: a discussion of the free energy balance
Negative interfacial energies of dynamic polymer brush interfaces: a discussion of the free energy balance Open
Interfacial energy is an important physical parameter for describing interfacial properties. However, quantifying the interfacial energy of a polymer–liquid interface is extremely difficult because numerous polymers reconstruct when expose…
View article: Mechanically Interlocked Vitrimer Based on Polybenzoxazine and Polyrotaxane
Mechanically Interlocked Vitrimer Based on Polybenzoxazine and Polyrotaxane Open
A mechanically interlocked vitrimer (MIV) based on a benzoxazine monomer and polyrotaxane (PR) has been prepared through a mechanically interlocked network (MIN) and dynamic covalent bond chemistry. The dynamic transacetalation exchange th…
View article: Silent elongation of polyrotaxane and its composites
Silent elongation of polyrotaxane and its composites Open
Polyrotaxanes (PR) have attracted great interest due to their unique mechanical properties, exhibiting the pulley effect, via their slide-ring topological structure. Flexible and functional composite materials consisting of PR and inorgani…
View article: Fracture Behavior of Polybenzoxazine Toughened by Polyrotaxane Molecules and Core–Shell Rubber
Fracture Behavior of Polybenzoxazine Toughened by Polyrotaxane Molecules and Core–Shell Rubber Open
The inherent brittleness of polybenzoxazines (PBas) makes them difficult for high-performance microelectronics and composite applications. Conventional toughening approaches are either ineffective or cause a reduction in the glass transiti…
View article: Bioinspired Oxidation-Resistant Catechol-like Sliding Ring Polyrotaxane Hydrogels
Bioinspired Oxidation-Resistant Catechol-like Sliding Ring Polyrotaxane Hydrogels Open
Adaptable hydrogels have been used in the biomedical field to address several pathologies, especially those regarding tissue defects. Here, we describe unprecedented catechol-like functionalized polyrotaxane (PR) polymers able to form hydr…
View article: High-yield one-pot synthesis of polyrotaxanes with tunable well-defined threading ratios over a wide range
High-yield one-pot synthesis of polyrotaxanes with tunable well-defined threading ratios over a wide range Open
In this work, we report a high-yield one-pot synthesis of polyrotaxane (PR), composed of (2-hydroxypropyl)-α-cyclodextrin (hpCD) and polyethylene glycol (PEG), with well-defined hpCD threading ratios controllable across a wide range from 0…
View article: Hydrogen-Bonded Structure of Water in the Loop of Anchored Polyrotaxane Chain Controlled by Anchoring Density
Hydrogen-Bonded Structure of Water in the Loop of Anchored Polyrotaxane Chain Controlled by Anchoring Density Open
Hydrogen-bonded network of water surrounding polymers is expected to be one of the most relevant factors affecting biocompatibility, while the specific hydrogen-bonded structure of water responsible for biocompatibility is still under deba…
View article: Softness, Elasticity, and Toughness of Polymer Networks with Slide-Ring Cross-Links
Softness, Elasticity, and Toughness of Polymer Networks with Slide-Ring Cross-Links Open
Slide-ring (SR) gels cross-linked by ring molecules are characterized by softness (low Young’s modulus), elasticity (low hysteresis loss), and toughness (large fracture energy). In this article, the mechanical and fracture properties of SR…
View article: CCDC 2008415: Experimental Crystal Structure Determination
CCDC 2008415: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2008413: Experimental Crystal Structure Determination
CCDC 2008413: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Damageless Tough Hydrogels with On-demand Self-reinforcement
Damageless Tough Hydrogels with On-demand Self-reinforcement Open
Most tough hydrogels are reinforced by introducing sacrificial structures that can dissipate input energy. However, since the sacrificial damages cannot recover instantly, the toughness of these gels drops substantially during consecutive …
View article: A neuromechanical model for<i>Drosophila</i>larval crawling based on physical measurements
A neuromechanical model for<i>Drosophila</i>larval crawling based on physical measurements Open
Animal locomotion requires dynamic interactions between neural circuits, muscles, and surrounding environments. In contrast to intensive studies on neural circuits, the neuromechanical basis for animal behaviour remains unclear due to the …
View article: Dynamic Light Scattering Study on Particle Diffusion in Slide-Ring Gels: Enhanced Fluctuation of Sliding Networks
Dynamic Light Scattering Study on Particle Diffusion in Slide-Ring Gels: Enhanced Fluctuation of Sliding Networks Open
International audience
View article: Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes
Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes Open
In this study, we prepared ultrafiltration membranes with a decoupled responses of filtration property to temperature and pH. The membrane preparation method was developed based on our previous work. We utilized methanol-supercritical carb…
View article: Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes
Multi-Stimuli-Responsive Mesoporous Membranes and Effect of Molecular Architecture on Thermo- and pH-Responsive Behavior of the grafted Block Copolymer brushes Open
In this study, we prepared ultrafiltration membranes with a decoupled responses of filtration property to temperature and pH. The membrane preparation method was developed based on our previous work. We utilized methanol-supercritical carb…
View article: Mechanical and Fracture Properties of Dynamically Cross-Linked Polymer Gels and Elastomers with Molecular Necklaces
Mechanical and Fracture Properties of Dynamically Cross-Linked Polymer Gels and Elastomers with Molecular Necklaces Open
We review mechanical and fracture properties of gels and elastomers containing polyrotaxane, necklace-like supramolecular assembly in which axial polymer chain is threaded through ring molecules. By cross-linking ring molecules of differen…
View article: Direct Observation of Large Deformation and Fracture Behavior at the Crack Tip of Slide-Ring Gel
Direct Observation of Large Deformation and Fracture Behavior at the Crack Tip of Slide-Ring Gel Open
Slide-ring gel is a highly deformable polymer gel prepared by cross-linking rings on polyrotaxanes, in which ring molecules are threaded onto a linear polymer chain. The remarkable extensibility of SR gels is due to the stress equalization…
View article: Optically transparent, high-toughness elastomer using a polyrotaxane cross-linker as a molecular pulley
Optically transparent, high-toughness elastomer using a polyrotaxane cross-linker as a molecular pulley Open
We prepared a mechanically tough, highly transparent elastomer by using a polyrotaxane cross-linker acting as a molecular pulley.