The compatibility and morphology of chitosan-poly (ethylene oxide) blends

Zhao, Wenwei; Yu, Li; Xin, Zhong; Zhang, Yuefang; Sun, Junqi

doi:10.1080/00222349508215531

Cited by 34 publications

(20 citation statements)

References 6 publications

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“…In particular, modification of chitosan, by means of blending with other polymers, is a convenient and effective method of improving physical properties for practical utilization. Many articles have reported on the modification of chitosan: for instance, blends with poly(vinyl alcohol) have modified hydrophilic properties 5 ; films of chitosan/nylon-4 blends show good mechanical properties and retain the excellent chelating ability of chitosan 6 ; the compatibility and morphology of chitosan-poly(ethylene oxide) blends are closely related to the blend 7 ; blends of chitosan with strongly crystalline polyamides (nylon-4 and nylon-6) and weakly crystalline polyamides (caprolactam/laurolactam and zytel) have also been investigated. 8 However, blends with the same charge of polyelectrolyte have not been extensively reported.…”

Section: Introductionmentioning

confidence: 98%

Characterization of films from chitosan and quaternized poly(4‐vinyl‐N‐butyl) pyridine solutions

Liu¹,

Xiao²

2004

J of Applied Polymer Sci

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All Blend films were prepared from a mixture of 2 wt % chitosan in acetate solution and 4 wt % quaternized poly(4-vinyl-N-butyl) pyridine (QPVP) in aqueous solution and dried at room temperature for 72 h to obtain the films. Their structure and properties were studied by infrared (IR), wide-angle X-ray diffraction (WXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TG), and differential scanning calorimetry (DSC). Crystallinities of the blend films decreased with the increase of QPVP when weight of QPVP content was less than 15.0 wt %. The thermostability, tensile strength, and breaking elongation of the films in dry state were better than those of chitosan film. Tensile strength of the blend film dried at 40°C under vacuum for 24 h achieved 56.38 MPa when the weight ratio of chitosan to QPVP was 9 : 1. The structural analysis indicated that there was a strong interaction between chitosan and QPVP resulting from strong adhesion between both polymers.

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Section: Introductionmentioning

confidence: 98%

Characterization of films from chitosan and quaternized poly(4‐vinyl‐N‐butyl) pyridine solutions

Liu¹,

Xiao²

2004

J of Applied Polymer Sci

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“…This is probably due to the significant effect of the stiff chitosan chain on mobility in the overall mixture, inhibiting the crystal growth of PEG. 9 On the other hand, the copolymer does not show any welldefined PEG crystalline peaks or chitosan crystalline peak (10°). There is a broad peak at 17°-25°.…”

Section: Sample Preparationmentioning

confidence: 99%

“…The appearance of interaction peaks in the blend suggests partial miscibility for all of the blend compositions tested, in agreement with literature. 9 Therefore, the improvement in ductility could be because of the partial miscibility of blends at room temperature.…”

Section: Ftir Characterizationmentioning

confidence: 99%

“…10 Chitosan/poly(ethylene oxide) (PEO) blends were found to be miscible below 50% (w/w) of chitosan. 9 Recently, it was found that a PEO/chitosan blends may be amorphous up to 20% PEO content. At higher weight fractions, PEO crystallizes by forming spherulites in the blend.…”

Section: Introductionmentioning

confidence: 99%

“…Significant work on the morphology and the miscibility issues on the resulting materials has been carried out. [2][3][4][5][6][7][8][9] Several blends of chitosan with other synthetic polymers have been evaluated, but poly(ethylene glycol) (PEG) is of particular interest. This is due to the hydrophilic, biocompatible, and biodegradable nature of PEG.…”

Section: Introductionmentioning

confidence: 99%

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Improvement in Ductility of Chitosan through Blending and Copolymerization with PEG: FTIR Investigation of Molecular Interactions

2002

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Chitosan is an important biomaterial used widely in medical applications. One of the key concerns about its use is the fragile nature of chitosan films. By comparing the component molecular interactions using FTIR, this study attempts to understand how the ductility of chitosan can be improved by blending and copolymerizing with poly(ethylene glycol) (PEG). An improvement in ductility was obtained for all compositions of blend as manifested by a decrease in modulus and an increase in strain at break. For comparable PEG composition (∼30%), the properties of the solution-cast blend were better than those of the grafted copolymer. Therefore, blending may be a more efficient way to improve ductility of chitosan. FTIR characterization of the materials revealed subtle decreases in molecular interactions upon annealing the partially miscible blend. These may not be apparent in DSC or X-ray diffraction, yet they play a key role in the mechanical behavior. It appears that in the case of the graft copolymer the improvement in the properties comes from suppression of the crystallinity of each component and not from component interactions. On the other hand, in the blend, the improvement appears to come predominantly from the "well-dispersed", "kinetically trapped" phase morphology and from the intermolecular interactions. Therefore, annealing the blend leads to decreased intermolecular interactions, phase coarsening, and deterioration in properties.

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Miscible Polymers

Krause

Goh

1999

The Wiley Database of Polymer Properties

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The compatibility and morphology of chitosan-poly (ethylene oxide) blends

Cited by 34 publications

References 6 publications

Characterization of films from chitosan and quaternized poly(4‐vinyl‐N‐butyl) pyridine solutions

Characterization of films from chitosan and quaternized poly(4‐vinyl‐N‐butyl) pyridine solutions

Improvement in Ductility of Chitosan through Blending and Copolymerization with PEG: FTIR Investigation of Molecular Interactions

Miscible Polymers

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