Nature Search

Spontaneous synthesis of a homogeneous thermoresponsive polymer network composed of polymers with a narrow molecular weight distribution

We have developed a method to obtain a polymer gel consisting of a relatively homogeneous network structure composed of polymers of narrow molecular weight simply by mixing the necessary compounds. In this method, two kinds of reactions with greatly different kinetics occurred sequentially only when all the compounds were mixed and allowed to stand at a constant temperature, and a relatively homogeneous network structure comprising cross linked polymers of low-molecular-weight distribution was spontaneously constructed.

Yuto Jochi
Takahiro Seki
Yukikazu Takeoka
ResearchOpen Access30 Aug 2018
NPG Asia Materials

Volume: 10, P: 840-848
Optimal conditions for the use of polyrotaxane as a cross-linker in preparing elastomers with high toughnesses

In this study, the effects of the polyrotaxane cross-linker concentration and solvent content on elastomer preparation were investigated to obtain elastomers with high toughnesses due to the properties of the polyrotaxane cross-linking agent. If elastomers were prepared in a state in which the slide-ring effect of the polyrotaxane was easily expressed by the concentration of the polyrotaxane cross-linker and the amount of solvent, the elastomers obtained elongated more and were tougher than elastomers made from conventional cross-linkers.

Sizhe Liu
Tomoya Hayashi
Yukikazu Takeoka
Research28 Feb 2024
Polymer Journal

Volume: 56, P: 589-598
Structurally Coloured Secondary Particles Composed of Black and White Colloidal Particles

Yukikazu Takeoka
Shinya Yoshioka
Takahiro Seki
ResearchOpen Access06 Aug 2013
Scientific Reports

Volume: 3, P: 1-7
Extremely stretchable thermosensitive hydrogels by introducing slide-ring polyrotaxane cross-linkers and ionic groups into the polymer network

Stimuli-responsive hydrogels have potential applications in multiple fields; however, a common problem is the brittleness of the resulting structures. Here, the authors report highly stretchable thermosensitive hydrogels by introducing sliding polyrotaxane cross-linkers and ionic groups into the system.

Abu Bin Imran
Kenta Esaki
Yukikazu Takeoka
ResearchOpen Access08 Oct 2014
Nature Communications

Volume: 5, P: 1-8
Recent advances in hydrogels in terms of fast stimuli responsiveness and superior mechanical performance

Abu Bin Imran
Takahiro Seki
Yukikazu Takeoka
Reviews29 Sept 2010
Polymer Journal

Volume: 42, P: 839-851
Structural color coating films composed of an amorphous array of colloidal particles via electrophoretic deposition

Structural color coatings are prepared using the electrophoretic deposition (EPD) of SiO₂ and carbon black particles. The arrangement of the particle array is controlled by varying the deposition condition. The angular dependence of the structural color changes dramatically with the arrangement of the particle array. Variously colored coatings can be produced on materials with complicated shapes.

Kiyofumi Katagiri
Yuuki Tanaka
Yukikazu Takeoka
ResearchOpen Access10 Mar 2017
NPG Asia Materials

Volume: 9, P: e355
Angle-independent colored materials based on the Christiansen effect using phase-separated polymer membranes

Angle-independent colored materials based on Christiansen effect was successfully prepared using phase-separated polymer membrane and thermotropic liquid crystal. Because this system displays angle-independent color and can act as a multi-color polymer-dispersed liquid crystal, I believe that this system may be applicable for energy-saving multi-color displays.

Yukikazu Takeoka
Reviews21 Dec 2016
Polymer Journal

Volume: 49, P: 301-308
Fusion materials for biomimetic structurally colored materials

This review addresses recent developments in angle-independent structurally colored materials composed of submicrometer-sized fine particles. Here, especially, I focused on the possibility of using colloidal amorphous arrays as angle-independent structurally colored stimuli-responsive materials based on the properties of colloidal amorphous arrays that have been elucidated in recent experimental investigations.

Yukikazu Takeoka
Reviews17 Dec 2014
Polymer Journal

Volume: 47, P: 106-113

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