Unusual Fracture Behavior of Slide-Ring Gels with Movable Cross-Links

Liu, Chang; Kadono, Hirokazu; Mayumi, Koichi; Katō, K.; Yokoyama, Haruki; Ito, Kohzo

doi:10.1021/acsmacrolett.7b00729

Cited by 94 publications

(112 citation statements)

References 19 publications

Supporting

Mentioning

111

Contrasting

Order By: Relevance

“…This result alsoi ndicatesthe typical characteristics of the pulley effect. [4] The high stretcho ft he HP-PRX-ALD/GC gels due to the pulley effect wasa lso qualitatively observed. As seen in Figure 3A,B ,t he ODEX/GC hydrogel wasr eadily broken by either slicing with ac utter or pressing with af inger.H owever,t he HP-PRX 10 -ALD/GC gel resisted slicing with aspatula cutter even after reaching the maximum cutting depth ( Figure 3C;see also Video S1).…”

Section: Resultsmentioning

confidence: 95%

“…[2c] At the time of deformation, the cross-linking junctions of the figure-of-eights hapes were not immobilized at the polymer chains, but could move freely in the network to equalize the tensiono ft he threadingp olymer chains in am anner similart ot hat of pulleys, involving the so-called "pulley effect". [4] This particular property drastically changes the mechanicalp roperties of polymeric materials, which is quite different from chemical hydrogels. [5] Slide-ring hydrogels are thought to be applicable to av ariety of biomaterials such as tissue scaffolds.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cell‐Encapsulating Hydrogel Puzzle: Polyrotaxane‐Based Self‐Healing Hydrogels

Cho

Ooya

2019

Chemistry A European J

View full text Add to dashboard Cite

Slide-ring hydrogels using polyrotaxanes have been developed as highly tough soft materials. However, they have never been used as biomaterials because of the lack of biocompatibility.M eanwhile, self-healing hydrogels are expected to improve fatigue resistance and extend the period of use. However,o wing to the lack of high mechanical strength, they are limited in their use as biomaterials.Here we first developed ab iocompatibles elf-healing/slide-ring hydrogel using glycol chitosana nd aw ater-soluble polyrotaxane. We obtained excellentm echanical toughness and biocompatibility to promote the proliferation of human umbilical vein endothelial cells (HUVECs) encapsulatedi nt he hydrogel. Owing to the rapid self-healing property,t he cellencapsulating gels adjusted arbitrarily, maintaining good cell proliferation function. Therefore, slide-ring hydrogels enable the use of biomaterials for soft-tissue engineering.[a] Dr.

show abstract

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Cell‐Encapsulating Hydrogel Puzzle: Polyrotaxane‐Based Self‐Healing Hydrogels

Cho

Ooya

2019

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…To achieve a gel material with strong mechanical properties, there are generally several methods based on previous research, such as double‐network gels, sliding‐ring gels, topological gels, and nanocomposite gels . Among them, nanocomposite gels can offer facile synthesis, superior mechanical strength, sensitive stimuli, and outstanding reversible properties at the same time.…”

Section: Introductionmentioning

confidence: 99%

Non‐Volatile Glycerin Gel Enhanced by Sub‐5 nm Particles with Super Elasticity, Recoverability, and High Temperature Resistance

Qiao

et al. 2019

Macro Chemistry & Physics

View full text Add to dashboard Cite

A gel material that can be applied to industry needs to fulfill two requirements: excellent mechanical properties and high temperature resistance. Previous research developed a hydrogel enhanced by sub‐5 nm particles, with excellent mechanical properties. While its application in the open environment is still limited by the volatilization of inner moisture, in this research, a non‐volatile gel (NV gel) enhanced by 5‐nm spherulites is manufactured. The NV gel remains stable after staying at 90 °C for 24 h. Meanwhile, being enhanced by sub‐5 nm nanospherulites, the NV gel shows good mechanical properties: with 200 ppm nanoparticle content, the tensile strength reaches 814 kPa and the compressive stress is 173.41 MPa at a recoverable 99% strain. The high temperature resistance is characterized by thermogravimetric analysis (TGA) and mechanical testing after thermal treatment. Transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, time of flight secondary ion mass spectrometry, and thermogravimetric analysis are used to evaluate the microstructure of NV gel. Possessing non‐volatile and good mechanical properties at the same time, this NV gel becomes very suitable for fulfilling the application requirement as an engineering material.

show abstract

“…Frequency dependence of elastic modulus E′, loss modulus E″ and tanδ for SR gel. This figure was reproduced from Ref [12]…”

mentioning

confidence: 99%

“…Crosslinker concentration dependence of Young s modulus for slidering (SR) gels and fixed crosslink (FC) gels. This figure was reproduced from Ref [12]…”

mentioning

confidence: 99%

Mechanical and Fracture Properties of Dynamically Cross-Linked Polymer Gels and Elastomers with Molecular Necklaces

Mayumi

Liu

Ito

2019

J. Soc. Rheol., Jpn

Self Cite

View full text Add to dashboard Cite

We review mechanical and fracture properties of gels and elastomers containing polyrotaxane, necklace-like supramolecular assembly in which axial polymer chain is threaded through ring molecules. By cross-linking ring molecules of different polyrotaxanes in solution, polymer chains are cross-linked by figure-of-eight cross-links and the obtained polymer networks are called slide-ring (SR) gels. The unique feature of SR gels is that the cross-linking points consisting of two rings can slide on polymer chains and chain length between cross-links changes with macroscopic deformation. From our crack propagation tests on SR gels with different structural parameters (cross-linking density, axial chain length, and ring coverage on polymer), we have found that the sliding of the movable cross-links enhances their mechanical toughness without any reduction of stiffness (Young's modulus). The slide-ring concept also can be applied to polymer gels and elastomers cross-linked by small amount of polyrotaxane cross-linkers.

show abstract

Unusual Fracture Behavior of Slide-Ring Gels with Movable Cross-Links

Cited by 94 publications

References 19 publications

Cell‐Encapsulating Hydrogel Puzzle: Polyrotaxane‐Based Self‐Healing Hydrogels

Cell‐Encapsulating Hydrogel Puzzle: Polyrotaxane‐Based Self‐Healing Hydrogels

Non‐Volatile Glycerin Gel Enhanced by Sub‐5 nm Particles with Super Elasticity, Recoverability, and High Temperature Resistance

Mechanical and Fracture Properties of Dynamically Cross-Linked Polymer Gels and Elastomers with Molecular Necklaces

Contact Info

Product

Resources

About