Self‐Driven Gel Conveyer: Effect of Interactions Between Loaded Cargo and Self‐Oscillating Gel Surface

Murase, Yoko; Takeshima, Reiji; Yoshida, Ryo

doi:10.1002/mabi.201100184

Cited by 28 publications

(23 citation statements)

References 22 publications

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“…It was suggested that the adhesion force between the cylindrical poly(AAm-co-MMA) gel and the self-oscillating gel sheet was too strong to apply the transport model because of their hydrophobic interaction. The adhesive force to prevent transportation is not significant for the other gels, which agrees with the prediction from swelling, zeta potential, and contact angle measurements [15].…”

Section: Design Of Autonomous Mass Transport Systemssupporting

confidence: 85%

“…11.3) [13][14][15][16]. It was found to be effective to copolymerize 2-acrylamido-2 -methylpropane sulfonic acid (AMPS) to a poly(NIPAAmco-Ru(bpy) 3 ) gel network to generate a large amplitude of volume change of the gel [13].…”

Section: Design Of Autonomous Mass Transport Systemsmentioning

confidence: 99%

“…And also, instead of the homopolymer gel of PAAm, several kinds of copolymer gels consisting of AAm with AMPS, N-(3-aminopropyl)methacrylamide hydrochloride (APMA), N-(hydroxymethyl)acrylamide (HMAAm), and methyl methacrylate (MMA) were prepared as model cargos with different surface properties; positive or negative charge, more hydrophilicity or hydrophobicity, respectively. The influences of these surface properties on the transport behaviors were investigated [15]. It was suggested that the adhesion force between the cylindrical poly(AAm-co-MMA) gel and the self-oscillating gel sheet was too strong to apply the transport model because of their hydrophobic interaction.…”

Section: Design Of Autonomous Mass Transport Systemsmentioning

confidence: 99%

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Biomimetic Self‐Oscillating Polymer Gels

Yoshida¹

2013

Intelligent Stimuli‐Responsive Materials

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There have been many studies on stimuli-responsive polymer gels that exhibit a reversible swelling-deswelling change in response to environmental changes such as solvent composition, temperature, and pH change. In contrast, we have developed a novel "self-oscillating" polymer gel that exhibits autonomous mechanical oscillation without an external control in a completely closed solution ( Fig. 11.1). For the design of the gel, the Belousov-Zhabotinsky (BZ) reaction, which is wellknown for exhibiting temporal and spatiotemporal oscillating phenomena [1, 2], was focused. We attempted to convert the chemical oscillation of the BZ reaction into a mechanical change in gels and generate an autonomous swelling-deswelling oscillation under non-oscillatory outer conditions. A copolymer gel consisting of N-isopropylacrylamide (NIPAAm) and ruthenium tris(2,2 -bipyridine) (Ru(bpy) 3 ), acting as a catalyst for the BZ reaction, was prepared ( Fig. 11.2a). When the poly(NIPAAm-co-Ru(bpy) 3 ) gel is immersed in the catalyst-free BZ solution, the reaction occurs in the gel by the catalytic function of the polymerized Ru(bpy) 3 (Fig. 11.2c). The redox changes of the polymerized catalyst moiety (Ru(bpy) 3 2+ Ru(bpy) 3 3+ ) change the volume phase transition temperature as well as the swelling ratio of the gel because the hydrophilicity of the polymer chains increases at the oxidized Ru(III) state and decreases at the reduced Ru(II) state (Fig. 11.2b). As a result, the gel exhibits an autonomous swelling-deswelling oscillation with the redox oscillation in the closed solution under constant condition (Fig. 11.2d).

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Section: Design Of Autonomous Mass Transport Systemssupporting

confidence: 85%

Section: Design Of Autonomous Mass Transport Systemsmentioning

confidence: 99%

Section: Design Of Autonomous Mass Transport Systemsmentioning

confidence: 99%

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Biomimetic Self‐Oscillating Polymer Gels

Yoshida¹

2013

Intelligent Stimuli‐Responsive Materials

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“…A model object, a cylindrical or spherical PAAm gel was put on the surface of self-oscillating gel sheet [18,[29][30][31]. It was observed that the object was transported on the gel surface with the propagation of the chemical wave as it rolled (Fig.…”

Section: Self-driven Gel Conveyer: Autonomous Transportation On the Smentioning

confidence: 99%

“…The influences of these surface properties on the transport behaviors were also investigated [30]. Instead of the homopolymer gel of PAAm, several kinds of copolymer gels consisting of AAm with AMPS, N-(3-aminopropyl)methacrylamide hydrochloride (APMA), N-(hydroxymethyl)acrylamide (HMAAm), and methyl methacrylate (MMA) were prepared as model cargos with different surface properties; positive or negative charge, more hydrophilicity or hydrophobicity, respectively.…”

Section: Self-driven Gel Conveyer: Autonomous Transportation On the Smentioning

confidence: 99%

Self-Oscillating Gels

Yoshida

2014

Soft Actuators

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Stimuli-responsive polymer gels and their application to smart materials have been widely studied. On the other hand, as a novel biomimetic gel, we developed gels with an autonomous self-oscillating function like a heart muscle, which was firstly reported in 1996. We designed the self-oscillating gels by utilizing the oscillating reaction, called the Belousov-Zhabotinsky (BZ) reaction which is recognized as a chemical model of the TCA cycle in organisms. The selfoscillating gel is composed of a poly(N-isopropylacrylamide) network in which the metal catalyst for the BZ reaction is covalently bonded. In a closed solution containing the reactants other than the catalyst, the gel undergoes spontaneous cyclic swelling-deswelling changes without any on-off switching of external stimuli. Their potential applications include several kinds of functional material systems, such as biomimetic soft-actuators and autonomous mass transport systems. Here recent progress on the novel polymer gels is introduced.

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Time‐Programming, Clocking, and Self‐Oscillating Polymer Gels

Yoshida

2022

Macromolecular Engineering

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In living systems, there are many autonomous and oscillatory phenomena to sustain life such as heart beating. “Self‐oscillating” polymer gels that undergo spontaneous cyclic swelling–deswelling changes without any on–off switching of external stimuli, as with heart muscle, were developed by the author's group. The self‐oscillating gels were designed by utilizing the Belousov–Zhabotinsky (BZ) reaction, an oscillating reaction, as a chemical model of the TCA cycle. They have systematically studied these self‐oscillating polymer gels since they were first reported in 1996. Potential applications of the self‐oscillating polymers and gels include several kinds of functional material systems such as biomimetic actuators, mass transport systems, and functional fluids. For example, it was demonstrated that an object was autonomously transported in the tubular self‐oscillating gel by the peristaltic pumping motion similar to an intestine. Further, self‐oscillating polymer brush surface like cilia, vesicles, or colloidosomes undergoing cell‐like autonomous shape oscillations with buckling, was prepared. Besides, autonomous sol‐gel oscillation and amoeba‐like motion were realized utilizing well‐designed block copolymer solution. In this article, recent progress on the self‐oscillating polymer gels is summarized.

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Self‐Driven Gel Conveyer: Effect of Interactions Between Loaded Cargo and Self‐Oscillating Gel Surface

Cited by 28 publications

References 22 publications

Biomimetic Self‐Oscillating Polymer Gels

Biomimetic Self‐Oscillating Polymer Gels

Self-Oscillating Gels

Time‐Programming, Clocking, and Self‐Oscillating Polymer Gels

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