Tasuku Nakajima
Hokkaido University
Self-healing hydrogelsUltimate tensile strengthBrittlenessDeformation (engineering)PolyelectrolyteComposite materialMonomerNanotechnologyPolymer chemistryMaterials scienceModulusIonic bondingSwellingDouble networkElastomerChemical engineeringFracture (geology)PolymerLamellar structureStress (mechanics)Toughness
99Publications
35H-index
4,422Citations
Publications 99
Newest
#1Yun Zhou Guo (Hokkaido University)H-Index: 2
#2Tasuku Nakajima (Hokkaido University)H-Index: 35
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 9 authors...
Abstract null null The extreme mechanical strength of fibrous connective tissues in the human body, such as ligaments and tendons, has always been challenging for hydrogel scientists. Here, we created extremely strong, purely cellulose-based hydrogels (DCC-E gels). The fracture stress and Young’s modulus of the gels were improved to the level of an Achilles tendon even at their equilibrium swollen state. To make DCC-E gels, regenerated cellulose gels were first prepared with ethanol as the anti-...
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#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...
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#1Ya Nan Ye (Hokkaido University)H-Index: 6
#2Kunpeng Cui (Hokkaido University)H-Index: 19
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
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Tough soft materials usually show strain softening and inelastic deformation. Here, we study the molecular mechanism of abnormally large nonsoftening, quasi-linear but inelastic deformation in tough hydrogels made of hyperconnective physical network and linear polymers as molecular glues to the network. The interplay of hyperconnectivity of network and effective load transfer by molecular glues prevents stress concentration, which is revealed by an affine deformation of the network to the bulk d...
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#1Tasuku NakajimaH-Index: 35
#2Ken-ichi HoshinoH-Index: 1
Last. Jian Ping GongH-Index: 79
view all 5 authors...
The equilibrium swelling degree of a highly swollen charged gel has been thought to be determined by the balance between its elastic pressure and ionic osmotic pressure. However, the full experimental verification of this balance has not previously been conducted. In this study, we verified the balance between the elastic pressure and ionic osmotic pressure of charged gels using purely experimental methods. We used tetra-PEG gels created using the molecular stent method (St-tetra-PEG gels) as th...
1 CitationsSource
#1Tomáš SedlačíkH-Index: 1
#2Takayuki NonoyamaH-Index: 21
Last. Jian Ping GongH-Index: 79
view all 8 authors...
1 CitationsSource
#1Haiyan Yin (CAS: Chinese Academy of Sciences)H-Index: 2
#2Daniel R. King (Hokkaido University)H-Index: 15
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
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The high water content of hydrogels makes them important as synthetic biomaterials, and tuning the mechanical properties of hydrogels to match those of natural tissues without changing chemistry is...
1 CitationsSource
#1Tasuku Nakajima (Hokkaido University)H-Index: 35
#2Takayuki Kurokawa (Hokkaido University)H-Index: 56
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 4 authors...
Double-network (DN) gels, consisting of brittle first and ductile second networks, possess extraordinary strength, extensibility, and fracture toughness while maintaining a high solvent content. Herein, we prepare DN gels consisting of various concentrations of the first and second networks to investigate the effect of each network structure on the tensile and fracture properties of DN gels. The results showed that the tensile properties of DN gels before yielding are mainly dominated by the fir...
1 CitationsSource
#1Takahiro Matsuda (Hokkaido University)H-Index: 6
#2Runa Kawakami (Hokkaido University)H-Index: 2
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
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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
#1Junchao Huang (Hokkaido University)H-Index: 9
#2Martin FrauenlobH-Index: 2
Last. Jian Ping GongH-Index: 79
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Chitin is a biopolymer which has been proved to be a candidate as biomedical materials, yet the weak mechanical properties limited their potentials seriously. In this work, a chitin-based double-ne...
4 CitationsSource
#1Tomáš SedlačíkH-Index: 1
#2Takayuki NonoyamaH-Index: 21
Last. Jian Ping GongH-Index: 79
view all 8 authors...
Supermacroporous hydrogels, possessing sponge-like structure and permeability, have drawn significant attention for their bioengineering and biomedical applications. However, their mechanical weakn...
5 CitationsSource