Dual cross-linked networks hydrogels with unique swelling behavior and high mechanical strength: Based on silica nanoparticle and hydrophobic association

Yang, Jun; Shi, Fu-Kuan; Gong, Cheng; Xie, Xu‐Ming

doi:10.1016/j.jcis.2012.05.046

Cited by 67 publications

(58 citation statements)

References 30 publications

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“…Moreover, the h-BN/PAM nanocomposite hydrogels also significantly excel the PAM , and further to 600 kPa (0.12 wt%). These results are consistent with our previous reports [4][5][6][7][8][9]15] that the nanomaterials with quantities of functional groups can work as analogous crosslinking points to sustain the increased stress and maintain the configuration of the gel network. Compared with the hydrogels composited with GO and nanoclay, the relatively limited improvement in mechanical properties of the gel by h-BN in this paper is mainly because the maximum content of the h-BN (0.12 wt%) is much lower than that of GO or nanoclay in GO/PAM hydrogels [21,30] or nanoclay/PAM hydrogels [31,32].…”

Section: Resultssupporting

confidence: 93%

“…Basically, cross-linkings may be divided into two different types, i.e., chemical (covalent bonds) and physical (ionic bonds, hydrogen bonds, etc.). In the past decades, hydrogels have received increasing attention owing to a wide range of potential applications, including tissue engineering, drug delivery, membrane separation, electrolytes and soft robot [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. However, most of the existing natural and synthetic hydrogels have poor mechanical properties, which unfortunately limit their applications in many fields where tough and flexible hydrogels are necessary.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we have prepared a high-strength GO/PAA nanocomposite hydrogels composed of a single network with dual crosslinking points through dynamic ionic interactions [7]. GO nanosheets are not only nanofiller with extraordinary mechanical strength and large surface area, but also serve as analogous crosslinking points [4][5][6][7][8][9]15] in the gel network, which cooperate with reversible ionic cross-linking points among the polymer chains to endow the gel with super toughness and stretchability.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transparent h- BN/polyacrylamide nanocomposite hydrogels with enhanced mechanical properties

Duan

Zhong

Shi

et al. 2016

Chinese Chemical Letters

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transparent h- BN/polyacrylamide nanocomposite hydrogels with enhanced mechanical properties

Duan

Zhong

Shi

et al. 2016

Chinese Chemical Letters

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“…Therefore, there is a need for slow swelling rate and good deformability that can overcome blocking near bore and migrate into the deep reservoirs. To improve the mechanical strength of traditional hydrogels, researchers have made efforts to develop chemically modified materials with novel structures, such as topological gels [14], nanocomposite gel [15][16][17][18], double network gel [19], polymer microsphere composite hydrogel [20,21], hydrophobic association hydrogel [22,23], and tetrapolyethylene glycol hydrogel [24].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

Jin

et al. 2018

International Journal of Polymer Science

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Microspheres have excellent sealing performances such as injectivity, bridging-off, deep migration, and deformation performances, but their plugging effects are limited by the fast swelling rate and poor viscoelasticity. In this study, we synthesized a novel modified microsphere with polymerizable surfactant monomers and cationic monomers. We investigated the influence factors on the swelling performance and rheological properties of the microspheres and explored the ways to improve the plugging performance of hydrophobic-associating microspheres. The association behaviors in aqueous media of poly(acrylamide-comethacry loyloxyethyl trimethyl ammonium chloride-co-n-dodecyl poly(etheroxy acrylate) P(AM-DMC-DEA) are proven to be mediated by the DEA content. Moreover, the hydrophobic association interaction has a strong effect on the performance of microspheres such as swelling properties, the rheological performance, and plugging properties. The swelling properties of microsphere studies exhibited the slow swelling rate. The rheological performance measurements showed significant improvements; yield stress, and creep compliance increased rapidly from 404 to 2060 Pa and 3.89 × 10 −4 to 1.41 × 10 −2 1/Pa, respectively, with DEA content in microspheres rising from 0.0% to 0.22%. The plugging properties of microspheres were enhanced by the slow swelling performance and good viscoelasticity.

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“…A three-dimensional structure of the gel is formed physically (van der Waals interactions, hydrogen bonds, electrostatic interaction) or chemically. The addition of different substances, for example laponite, mineral clays, soluble alkaline silicates, can significantly improve hydrogel properties, such as adhesion, mechanical strength, and absorption [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Rheology of Cross-Linked Poly(Sodium Acrylate)/Sodium Silicate Hydrogels

et al. 2015

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Transparent hydrogels consisting of poly(sodium acrylate) and sodium silicate were synthesized by freeradical polymerization of sodium acrylate (ANa) in an aqueous solution of sodium silicate (i.e. water glass) with the silicate modulus (M) 2.50 and the Midafen R-102 polymer filler, in the presence of sodium thiosulphate/potassium persulphate (NTS/KPS) as the redox initiators and N , Nmethylenebisacrylamide as the cross-linking monomer. The hydrogels, obtained in this way, were rheologically tested, and also the gelling point, dependence of shear stress on shear rate, and oscillation constants were determined. The results indicated that during the cross-linking reaction, which is associated with a gradual building of the three-dimensional gel structure, the reaction mixture changes its rheological behaviour from pseudo-thixotropic at the beginning of the reaction to pseudo-anti-thixotropic in the end. Both elasticity modulus G and viscosity modulus G during the reaction and for the cast samples after 24 h have practically the same values and the phase shift angle δ is below 20 • which means that we obtained a highly elastic material. It was also found that the elasticity modulus G values increase with the content of sodium silicate in the sample.B Joanna Mastalska-Popławska

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Dual cross-linked networks hydrogels with unique swelling behavior and high mechanical strength: Based on silica nanoparticle and hydrophobic association

Cited by 67 publications

References 30 publications

Transparent h- BN/polyacrylamide nanocomposite hydrogels with enhanced mechanical properties

Transparent h- BN/polyacrylamide nanocomposite hydrogels with enhanced mechanical properties

Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

Rheology of Cross-Linked Poly(Sodium Acrylate)/Sodium Silicate Hydrogels

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