Honglei Guo
Hokkaido University
Composite numberSelf-healing hydrogelsMicroelectrodeAnalytical chemistryPolyelectrolyteCopolymerComposite materialFourier transform infrared spectroscopyCastingMonomerNanotechnologyX-ray photoelectron spectroscopyCationic polymerizationAqueous solutionViscoelasticityIonic strengthPolymer chemistryMaterials scienceElectrical conductorIonic bondingSwellingDouble network4d printingCounterionChemical engineeringPolymerizationCarbon nanotubePolymerElectric potentialNanocompositeDonnan potentialToughness
26Publications
13H-index
833Citations
Publications 26
Newest
#1Tasuku NakajimaH-Index: 35
#2Ken Ichi Hoshino (Hokkaido University)
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
#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...
6 CitationsSource
#1Chengtao Yu (Hokkaido University)H-Index: 8
#2Honglei Guo (Hokkaido University)H-Index: 13
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 7 authors...
The memory of our brain, stored in soft matter, is dynamic, and it forgets spontaneously to filter unimportant information. By contrast, the existing manmade memory, made from hard materials, is static, and it does not forget without external stimuli. Here we propose a principle for developing dynamic memory from soft hydrogels with temperature-sensitive dynamic bonds. The memorizing–forgetting behavior is achieved based on fast water uptake and slow water release upon thermal stimulus, as well ...
17 CitationsSource
#1Hailong Fan (Hokkaido University)H-Index: 17
#2Honglei Guo (Hokkaido University)H-Index: 13
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 4 authors...
Abstract Although cation−π interactions play a critical role in biological systems, experimental studies in aqueous environments are limited due to a lack of suitable systems and methods. The recent success in synthesizing water-soluble poly(cation−π) bearing adjacent cationic/aromatic residues provides excellent systems for studying cation−π interactions in aqueous environments. In this study, we investigated competitive cation−π interactions between small cations and macrocations with phenyl g...
4 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 ...
4 CitationsSource
#1Kohei Murakawa (Hokkaido University)H-Index: 1
#2Daniel R. King (Hokkaido University)H-Index: 15
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 6 authors...
Polyelectrolyte complexation between oppositely charged polyelectrolytes forms coacervates in dilute solutions and thin films in concentrated solutions. It is difficult to obtain macroscopically uniform bulk polyelectrolyte complex (PEC) materials, since the two polymers form insoluble complexes quickly at the contact interface during mixing, resulting in heterogeneous aggregates. Here, we succeeded in preparing bulk PEC materials based on desalting-induced polyelectrolyte complexation via visco...
16 CitationsSource
#1Martin FrauenlobH-Index: 2
#2Daniel R. King (Hokkaido University)H-Index: 15
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 9 authors...
The hydrogel chemical structure at the gel-solution interface is important toward practical use, especially in tough double network (DN) hydrogels that have promising applications as structural biomaterials. In this work, we regulate the surface chemical structure of DN hydrogels and the surface–bulk transition by the molding substrate used for the synthesis of the second network. To characterize the surface and bulk structure, we combined attenuated total reflectance Fourier-transform infrared ...
6 CitationsSource
#1Yiwan Huang (Hokkaido University)H-Index: 14
#2Daniel R. King (Hokkaido University)H-Index: 15
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
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Fiber reinforced soft composites (FRSCs) have been developed recently by combining tough but soft polyampholyte hydrogels with stiff yet flexible woven glass fabrics. In this work, we find that the soft composites show increased tearing resistance with sample size and achieve size-independent, exceptionally high tearing energy above a specific size on the centimeter scale. Such size-dependent tearing behavior correlates with the failure mode change from fiber pull-out to fiber fracture. These fi...
20 CitationsSource
#1Feng Luo (Hokkaido University)H-Index: 56
#2Tao Lin Sun (Hokkaido University)H-Index: 21
Last. Jian Ping Gong (Hokkaido University)H-Index: 79
view all 9 authors...
Abstract Tough hydrogels with adjustable stiffness are expected for adapting application as various biomaterials. Oppositely charged polyelectrolytes form tough and self-healing physical polyion-complex (PIC) hydrogels via formation of inter-chain ionic bonds with a wide distribution in bond strength. The strong bonds serve as permanent crosslinking to impart elasticity and the weak bonds as reversible sacrificial bonds to dissipate energy and to self-heal. In this work, we fabricate four PIC hy...
25 CitationsSource