Synthesis and characteristics of the interpenetrating polymer network hydrogel composed of chitosan and polyallylamine

Shin, Mi‐Seon; Kim, Seon Jeong; Park, Sang Jun; Lee, Yong Hee; Kim, Sun I.

doi:10.1002/app.11008

Cited by 43 publications

(16 citation statements)

References 26 publications

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“…As the amount of chitosan is increased, the structure becomes more rigid and the average pore size in the hydrogel decreases as shown in Table 1. This result is consistent with previous data which indicate that the glass transition temperature increases with the amount of chitosan in the gel [10]. The average pore size was measured to be between 240 Am (1 wt.% chitosan) and 25 Am (5 wt.% chitosan).…”

Section: Resultssupporting

confidence: 86%

Diffusion coefficient of paracetamol in a chitosan hydrogel

2004

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Section: Resultssupporting

confidence: 86%

Diffusion coefficient of paracetamol in a chitosan hydrogel

2004

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“…The dried semi‐IPN gel should exhibit glass transition behaviour. T g would be influenced by more solid pore walls, which would retard the movement of polymer segments and bring about an increase of T g 19, 20. In our current studies, low scanning rate T g measurements revealed the effect of the microstructure of the gels on T g .…”

Section: Resultsmentioning

confidence: 45%

Swelling mechanism of porous P(VP‐co‐MAA)/PNIPAM semi‐IPN hydrogels with various pore sizes prepared by a freeze treatment

Jin

Bian

Liu

et al. 2008

Polymer International

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BACKGROUND: The objective of the work reported was to investigate the effect of gel microstructure on the swelling mechanism. A series of porous gels with various pore sizes were prepared by freeze-treating a conventional hydrogel that contained various amounts of water at −20 • C. Scanning electron microscopy and differential scanning calorimetry were used to characterize the microstructure of the porous gels. RESULTS:The experimental results showed that the water content during freezing was the key factor controlling the microstructure. Measurement of swelling kinetics showed that a greater amount of water during the freezing process would lead to a rapid swelling rate. The apparent diffusion coefficients (D p ) at all times during the swelling process were obtained by fitting the experimental data to the diffusion equation. The values of D p suggested that the swelling mechanism of the gels depends on the pore size. The diffusion exponent (n) obtained by fitting the fractional mass change (M t /M ∞ ) to equation of Fick's law further confirmed that the swelling mechanism of the gels is determined by the pore size. CONCLUSION: The swelling mechanism of the gels is determined by the microstructure related to the pore size and the thickness of struts. The microstructure can be controlled by adjusting the water content of the hydrogels by changing the pH of the swelling medium prior to freezing.

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“…Blending of chitosan with other polymers (Park and Nho, 2001;Shin et al 2002;Zhu et al 2002) and crosslinking are both convenient and effective methods of improving the physical and mechanical properties of chitosan for practical applications. Immunization studies carried out on rats using glutaraldehyde crosslinked chitosan spheres (Jameela et al 1994) showed promising tolerance by the living tissues of the rat muscles.…”

Section: Chitosanmentioning

confidence: 99%

Swelling properties of chitosan hydrogels

Rohindra¹,

Nand²,

Khurma³

2004

S. Pac. J. Nat. App. Sci.

110

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Chitosan hydrogels were prepared by crosslinking chitosan with glutaraldehyde. The swelling behaviour of the crosslinked and uncross-linked hydrogels was measured by swelling the gels in media of different pH and at different temperatures. The swelling behavior was observed to be dependent on pH, temperature and the degree of crosslinking. The gel films were characterized by Fourier transform Infrared spectroscopy (FT-IR) and Differential Scanning Calorimetry (DSC). The glass transition temperature (Tg) and the amount of free water in the hydrogels decreased with increasing crosslinking in the hydrogels.

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Synthesis and characteristics of the interpenetrating polymer network hydrogel composed of chitosan and polyallylamine

Cited by 43 publications

References 26 publications

Diffusion coefficient of paracetamol in a chitosan hydrogel

Diffusion coefficient of paracetamol in a chitosan hydrogel

Swelling mechanism of porous P(VP‐co‐MAA)/PNIPAM semi‐IPN hydrogels with various pore sizes prepared by a freeze treatment

Swelling properties of chitosan hydrogels

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