Internal structure and mechanical property of an anisotropic hydrogel with electrostatic repulsion between nanosheets

Sano, Koki; Igarashi, Naoki; Arazoe, Yuka Onuma; Ishida, Yasuhiro; Ebina, Yasuo; Sasaki, Takayoshi; Hikima, Takaaki; Aida, Takuzo

doi:10.1016/j.polymer.2019.05.064

Cited by 13 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1a and Supplementary Fig. 1 ) 27 – 30 . TiNS is densely populated with negative charges (1.5 C m –2 ) that are surrounded by tetrabutylammonium countercations.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A mechanically adaptive hydrogel with a reconfigurable network consisting entirely of inorganic nanosheets and water

et al. 2020

Self Cite

View full text Add to dashboard Cite

Although various biomimetic soft materials that display structural hierarchies and stimuli responsiveness have been developed from organic materials, the creation of their counterparts consisting entirely of inorganic materials presents an attractive challenge, as the properties of such materials generally differ from those of living organisms. Here, we have developed a hydrogel consisting of inorganic nanosheets (14 wt%) and water (86 wt%) that undergoes thermally induced reversible and abrupt changes in its internal structure and mechanical elasticity (23-fold). At room temperature, the nanosheets in water electrostatically repel one another and self-assemble into a long-periodic lamellar architecture with mutually restricted mobility, forming a physical hydrogel. Upon heating above 55 °C, the electrostatic repulsion is overcome by competing van der Waals attraction, and the nanosheets rearrange into an interconnected 3D network of another hydrogel. By doping the gel with a photothermal-conversion agent, the gel-to-gel transition becomes operable spatiotemporally on photoirradiation.

show abstract

“…1a and Supplementary Fig. 1 ) 27 – 30 . TiNS is densely populated with negative charges (1.5 C m –2 ) that are surrounded by tetrabutylammonium countercations.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, by adopting the above strategy, we succeeded in developing a stimuli-responsive hydrogel consisting of anionic nanosheets of titanate [27][28][29][30] (TiNSs; 14 wt%) and water (86 wt%) that, depending on the temperature, can reversibly adopt one of two hydrogel states: a repulsion-dominant state or an attractiondominant state (Fig. 1).…”

mentioning

confidence: 99%

A mechanically adaptive hydrogel with a reconfigurable network consisting entirely of inorganic nanosheets and water

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, after 12 h incubation with 10% and 50% fetal bovine serum (FBS), their hydrodynamic diameters increased 30–60 nm and 50–60 nm, respectively, along with stable PDI. The reasons for above results might include the electrostatic repulsion 49 and formation of nanoparticle corona 50 , 51 . Therefore, the nanoparticles can be stored in water and PBS buffer for at least 48 h.…”

Section: Resultsmentioning

confidence: 95%

Intelligent lesion blood–brain barrier targeting nano-missiles for Alzheimer's disease treatment by anti-neuroinflammation and neuroprotection

Wang

Yang

et al. 2022

Acta Pharmaceutica Sinica B

View full text Add to dashboard Cite

“…Improving the mechanical properties of magnetic composite hydrogels has been a focus for many researchers due to their significant relevance in practical applications. 24,25 GO, as a two-dimensional material that enhances the mechanical properties of hydrogels, 26 was employed as an additive to enhance the magnetic hydrogels. Figure 4a illustrates that the stress-strain curves of PAM hydrogel closely align with those of PAM-M1, PAM-M2, PAM-M3, and PAM-M4.…”

Section: Resultsmentioning

confidence: 99%

Preparation of graphene oxide enhanced magnetic composite hydrogels by one‐pot method for selective adsorption

Yan,

Liu,

Yang

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Magnetic composite hydrogels exhibit promising prospects for diverse applications, but their mechanical properties impose limitations on their further advancement. In this study, a novel approach is proposed to directly prepare magnetic composite hydrogels utilizing nanoferroferric oxide, aiming to replace the existing preparation method. Meanwhile, graphene oxide (GO) is introduced into magnetic composite hydrogels to enhance their mechanical characteristics. By employing ammonium citrate (AC) as a dispersant, the dispersion of ferroferric oxide magnetic nanoparticles at a concentration of 40 mg/mL is achieved, enabling their coexistence with GO for the preparation of magnetic composite hydrogels. Notably, the incorporation of 3 mg/mL GO and 40 mg/mL magnetic nanoparticles in polyacrylamide (PAM) hydrogel yields remarkable improvements in maximum stress and strain, reaching 148 kPa and 496%, respectively. In contrast, magnetic composite hydrogels without GO exhibit lower values of 46.5 kPa and 351%. The presence of magnetic nanoparticles imparts magnetism to the hydrogel, with higher concentrations of magnetic nanoparticles leading to increased magnetism. Moreover, the presence of AC and GO renders the hydrogels electronegative, thereby endowing them with selective adsorption capabilities. In summary, the magnetic composite hydrogels prepared by one‐pot method have good mechanical properties and selective adsorption capacity, and have good application potential.

show abstract

Internal structure and mechanical property of an anisotropic hydrogel with electrostatic repulsion between nanosheets

Cited by 13 publications

References 21 publications

A mechanically adaptive hydrogel with a reconfigurable network consisting entirely of inorganic nanosheets and water

A mechanically adaptive hydrogel with a reconfigurable network consisting entirely of inorganic nanosheets and water

Intelligent lesion blood–brain barrier targeting nano-missiles for Alzheimer's disease treatment by anti-neuroinflammation and neuroprotection

Preparation of graphene oxide enhanced magnetic composite hydrogels by one‐pot method for selective adsorption

Contact Info

Product

Resources

About