Takahiro Matsuda
Hokkaido University
Self-healing hydrogelsMicroelectrodeUltimate tensile strengthElasticity (economics)ElectrostaticsBiophysicsPolymer sciencePlanarDissipationDiffusion (business)BrittlenessFabricationStampingFluorescence correlation spectroscopyDeformation (engineering)Charge densityPolyelectrolyteComposite materialSmall moleculeNanotechnologyCovalent bondMacromolecular crowdingField (physics)Materials scienceModulusStrain energyDeformation (meteorology)Science, technology and societyEthyl acrylateRotational diffusionChemical substanceEthylene glycolMullins effectTougheningSwellingCelluloseFocal pointSurface chargeCharacterization (materials science)Mechanism (sociology)Soft materialsFatigue resistanceMechanical strengthMuscle trainingSynthetic materialsInternal fractureSwelling ratioIonic dissociationDouble networkBond cleavageExtensibilityMoleculeElongationElastomerComputer scienceChemical engineeringFracture (geology)PolymerizationRelaxation (NMR)Tissue engineeringPolymerPEG ratioAmorphous solidFracture mechanicsBiofoulingAbsorption (chemistry)AnisotropyStress (mechanics)FluorescenceDissipation factorThermodynamicsToughness
Publications 17
#1Johtaro Yamamoto (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 8
#2Akito Matsui (Hokkaido University)
Last. Masataka Kinjo (Hokkaido University)H-Index: 44
view all 8 authors...
Macromolecular crowding (MMC) in cells is a hot topic in biology; therefore, well-characterized measurement standards for the evaluation of the nano-environment in MMC solutions are necessary. We propose to use polarization-dependent fluorescence correlation spectroscopy (Pol-FCS) for evaluation of macromolecular crowding in solutions. Pol-FCS can simultaneously measure the relaxation times of rotational and translational diffusion of fluorescent molecules at the same position, even in living ce...
2 CitationsSource
#1Yong Zheng (Hokkaido University)H-Index: 1
#1Yong Zheng (Hokkaido University)
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 10 authors...
High modulus, toughness, and fatigue resistance are usually difficult to be obtained simultaneously in rubbery materials. Here, we report that by superimposing the nanophase separation structure in...
#1Takahiro Matsuda (Hokkaido University)H-Index: 6
#2Runa Kawakami (Hokkaido University)H-Index: 2
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 4 authors...
Quantitative characterization of the energy dissipation zone around a crack tip is the focal point in the fracture mechanics of soft materials. In this report, we present a mechanochemical techniqu...
8 CitationsSource
#1Honglei Guo (SYSU: Sun Yat-sen University)H-Index: 1
#2Yuto Uehara (Hokkaido University)H-Index: 1
Last. Takayuki Kurokawa (Hokkaido University)H-Index: 56
view all 9 authors...
Soft tissue engineering requires antifouling materials that are biocompatible and mechanically flexible. Conventional hydrogels containing more than 70 wt% water are thus promising antifouling material candidates. However, some hydrogels are difficult to apply in internal body organs because of undesirable protein absorption on their surfaces. Due to the lack of an effective method for observing the true charge densities of hydrogels, the reason why electrostatic interactions dominate protein ab...
7 CitationsSource
#1Tasuku Nakajima (Hokkaido University)H-Index: 35
#2Yuhei Ozaki (Hokkaido University)H-Index: 1
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 8 authors...
Double-network (DN) gels and elastomers, which consist of two (or more) rubbery polymer networks with contrasting physical properties, have received significant attention as they are extremely tough soft materials. The first network of tough DN materials should be more brittle and weaker than the second network. In this paper, we re-examined the structural requirements of the covalently cross-linked first network of tough DN materials and established a nonprestretching strategy. While prestretch...
7 CitationsSource
#1Honglei Guo (Hokkaido University)H-Index: 13
#2Wei Hong (SU: Southern University and A&M College)H-Index: 35
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 10 authors...
Double-network (DN) hydrogels have attracted considerable attention owing to their unique mechanism to show extraordinary mechanical strength and toughness. Although the toughening mechanism of the DN gels, breaking of the relatively stiff and brittle first network as sacrificial bonds, is widely accepted, the microstructure and morphology evolution of the internal damage have hardly been revealed. In this study, we study the internal structures of the first network in partially damaged DN gels ...
3 CitationsSource
#1Joji Murai (Hokkaido University)H-Index: 1
#2Tasuku Nakajima (Hokkaido University)H-Index: 35
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 7 authors...
Abstract Amorphous cellulose-based tough double-network (DN) elastomers were successfully fabricated. These elastomers comprise interpenetrated poly(ethyl acrylate) (PEA) network as the soft matrix and the amorphous cellulose network as the brittle component. Unlike carbon-black-filled conventional rubbers, the obtained cellulose/PEA DN elastomers are transparent and can be dyed without any color limitation. Although the cellulose network in the DN elastomer comprises only 2.55 wt%, such cellulo...
6 CitationsSource
#1Thanh-Tam Mai (Kyoto Institute of Technology)H-Index: 5
#2Takahiro Matsuda (Hokkaido University)H-Index: 6
Last. Kenji Urayama (Kyoto Institute of Technology)H-Index: 36
view all 5 authors...
Anisotropy of strain-induced internal damage in tough double network (DN) hydrogels is characterized by a sequence of two tensile experiments. Firstly, the virgin DN gels are subjected to a single biaxial loading–unloading cycle using various combinations of the two maximum strains λx,m and λy,m in the x- and y-directions (λx,m ≥ λy,m). Secondly, the rectangular subsamples, which are cut out from the unloaded specimens so that the long axis can have an angle (θ) relative to the larger pre-strain...
5 CitationsSource
#1Takahiro MatsudaH-Index: 6
#2Tasuku NakajimaH-Index: 35
Last. Jian Ping GongH-Index: 79
view all 3 authors...
The double-network (DN) structure is a state-of-the-art strategy used for toughening soft materials. The challenge for widespread applications, however, is the difficulty in synthesizing the two interpenetrating networks with contrasting architecture, i.e., one network is brittle and sparse and the other is stretchable and dense. Such structures are formed to toughen hydrogels via two-step sequential synthesis of a highly swellable polyelectrolyte network and a subsequent stretchable network in ...
29 CitationsSource