Rheological characterisation of a novel thermosensitive chitosan/poly(vinyl alcohol) blend hydrogel

Tang, Yufeng; Du, Yumin; Hu, Xianwen; Shi, Xiaowen; Kennedy, John F.

doi:10.1016/j.carbpol.2006.06.015

Cited by 262 publications

(112 citation statements)

References 21 publications

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“…At this point, the molecules were 'free' and the reptation process begins which contributed to the healing process. In comparison with G", the higher G' value of the gel means the stronger gel intensity [15].…”

Section: Rheological Studies and Determination Of Minimum Healing Temmentioning

confidence: 96%

Effect of different healing temperature on self-healing hydrogel

Sirajuddin

Jamil²,

Lazim³

2014

AIP Conference Proceedings

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Section: Rheological Studies and Determination Of Minimum Healing Temmentioning

confidence: 96%

Effect of different healing temperature on self-healing hydrogel

Sirajuddin

Jamil²,

Lazim³

2014

AIP Conference Proceedings

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“…In general, the viscosity of a gel is dependent on the solvent concentration Tsunoda et al 2000;Tang et al 2007). For simplicity, we will only consider the case of constant viscosity in the current paper.…”

Section: Specific Materials Modelmentioning

confidence: 99%

A visco-poroelastic theory for polymeric gels

Wang

Hong

2012

Proc. R. Soc. A.

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A polymeric gel can imbibe solvent and swell. Besides the dilatational mode of deformation, which involves long-range solvent migration, a gel may also undergo volume-conserved deformation. For a macroscopic gel with covalent cross-links, the volume-conserved deformation is usually much faster. However, these two modes are coupled for deformation at the microscopic level and for gels containing physical cross-links or large solvent molecules. In this paper, we seek to formulate a unified theoretical framework for the transient behaviour of polymeric gels to account for both solvent migration and viscoelastic deformation. Under this framework, we further develop a simple material model, and implement it into a finite-element code for numerical calculations. By simultaneously tracking the solvent migration and motion of polymer network, we evolve the inhomogeneous fields of stress and chemical potential. Several initial-boundary-value problems are solved as illustrative examples. For macroscopic gels with low viscosity, the time scales for viscoelasticity and poroelasticity are separated, and the long-term behaviour is just as that predicted by a poroelastic model. For structures or processes involving sizes comparable to the intrinsic length of a material, the viscoelasticity and poroelasticity must be considered simultaneously, especially when studying impact responses.

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“…Os hidrogéis sintetizados foram liofilizados, misturados com KBr e prensados em alta pressão, formando pastilhas (Tang et al, 2007;Singh et al, 2007). Espectros de FTIR foram obtidos registrando 128 varreduras de 400 a 4.000 cm -1 , com resolução de 2 cm -1 .…”

Section: Os Experimentos Foram Realizados Na Embrapaunclassified