Miscibility studies on the blends of collagen/chitosan by dilute solution viscometry

Yichun, Ye; Dan, Weihua; Zeng, Rui; Lin, Hai; Dan, Nianhua; Guan, Linbo; Zhen-jian, MI

doi:10.1016/j.eurpolymj.2006.10.024

Cited by 43 publications

(23 citation statements)

References 20 publications

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“…Modification of chitosan by blending with other polymeric materials might be of interest for some applications. Lots of chitosan blends and composites with other polymers have been proposed in the literature, for example, chitosan/cellulose membrane [3,4], chitosan/starch [5], chitosan/gelatin [6] and chitosan/collagen [7]. The compatibility of chitosan with these polymers may be obtained since chitosan is considered as a strongly interacting polymer [8].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

El-Hefian

Nasef

Yahaya

et al. 2010

J. Chil. Chem. Soc.

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In this work, a number of mixture aqueous solutions of chitosan/agar (CS/AG) at different ratios (considering chitosan as the main component) were prepared. The rheological properties i.e. shearing viscosity and shear stress of the blend solutions as a function of shear rate as well as the thermal properties of the blend films were investigated. Among the parameters studied were temperature, shearing time and storage time. Results showed that almost Newtonian behavior was observed at temperatures from 40 o C to 55 o C for the ratios 100/0, 90/10, 80/20 and 70/30. However, the proportions 60/40 and 50/50 showed a clear shear thinning behavior (pseudoplastic non-Newtonian behavior). It was also found that all the blend solutions obeyed the Arrhenius equation. In addition, the effect of shearing time on the shearing viscosity of all blends did not show any significant differences at all shearing times applied in this study except the proportion 50/50 wherein decreasing in shearing viscosity and shear stress was observed as the shearing time increased. Furthermore, different behaviors were observed for the blend solutions when the period of storage was extended to three weeks. The FTIR results and the differential scanning calorimetery (DSC) curves showed that the interaction between chitosan and agar can occur.

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Section: Introductionmentioning

confidence: 99%

“…The rheological behavior of chitosan solutions [22][23][24][25] as well its thermal decomposition and stability [26][27][28][29] have been already reported in the literature. However, to our knowledge, no much work has been done on chitosan/agar blends.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

El-Hefian

Nasef

Yahaya

et al. 2010

J. Chil. Chem. Soc.

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“…And also, the versatility of the viscometric technique is not affected by the choice of solvent, as was reported by some authors [3]. There are many criteria proposed by researchers to determine polymer‐polymer compatibility by viscometry such as Krigbaum&Wall's Δ b parameter, Sun's α parameter, Chee's Δ B and μ parameters, Zelinger‐Heidingsfeld's Δ i parameter and Kulhshreshtha's %composition‐[η] m plot [15–22].…”

Section: Introductionmentioning

confidence: 90%

The effects of compatibility on the mechanical properties and fatigue resistance of butyl/EPDM rubber blends

2010

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In this study, compatibility of butyl/ethylene‐propylene‐diene rubbers in different ratios was investigated byviscometric technique. For evaluating polymer compatibility, the parameters Δb suggested by Krigbaum&Wall, ΔB and μ that were suggested by Chee were calculated. Data obtained from viscometric study were used for preparing new compound recipe. Mechanical and rheological properties of the new compounds were measured and the changes in the properties before and after thermal aging were determined. Replacement of ethylene‐propylene‐diene rubber with butyl rubber in appropriate ratio improved the fatigue resistance of the vulcanizates. Improvement of dynamic mechanical properties of polymer blends is expected only in the case of blending compatible polymers in appropriate ratios. The compatibility of blends in different ratios has been studied by viscometric technique and mechanical measurements and obtained very similar results. It has been concluded that viscometric determination of butyl/ethylene‐propylene‐diene rubbers compatibility could be used as a simple technique for predicting the mechanical properties of the same rubber blend that was related with solid phase compatibility. POLYM. COMPOS., 31:1869–1873, 2010. © 2010 Society of Plastics Engineers.

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“…The polymer blend of 0.6 weight fraction of NOCC has a maximum deviation, which suggests the strongest interaction Brought to you by | Carleton University OCUL Authenticated Download Date | 6/12/15 4:52 PM between NOCC and CA. Garcia et al [16] proposed the criterion ∆ [ η ]; according to this, all the blends of NOCC/CA are miscible [28] .…”

Section: Characterization Of Ca and All Compositions Of Nocc/ca By Ftirmentioning

confidence: 99%

Dilute solution viscometry study on the miscibility of N,O-carboxymethyl chitosan-cellulose acetate blends

Boricha

Murthy

2011

Journal of Polymer Engineering

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Dilute solution viscometry method is used for studying viscosity behavior of newly prepared N , O -carboxymethyl chitosan (NOCC), cellulose acetate (CA), and their blends at different compositions (0/10, 2/8, 4/6, 5/5, 6/4, 8/2, 10/0). In this method, reduced viscosity ( η sp / c ) and inherent viscosity (ln η rel / c ) of the given polymer sample have been determined by measuring the fl ow time of the polymer sample in acetone solvent. Huggins ( k ) and Kraemer coeffi cients ( k ′ ) for given polymer-solvent system are calculated from the extrapolation of plots ( η sp / c ) versus ( c ) and (ln η rel / c ) versus ( c ). The miscibility of this polymer system is determined using different criteria such as ∆ b , ∆ b ′ , b 12 exp , interaction parameter ∆ [ η ], thermodynamic parameter α , and modifi ed thermodynamic parameter β . Based on the positive or negative sign of this criteria, miscibility of the polymer system is investigated. The results of the dilute solution viscometry method suggested that the NOCC/CA blends are miscible at the compositions range of 4/6, 5/5, 6/4, and 8/2 and completely immiscible at the 2/8 composition. The results are also supported by Fourier transform infrared analyses of all the compositions.

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Miscibility studies on the blends of collagen/chitosan by dilute solution viscometry

Cited by 43 publications

References 20 publications

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

The effects of compatibility on the mechanical properties and fatigue resistance of butyl/EPDM rubber blends

Dilute solution viscometry study on the miscibility of N,O-carboxymethyl chitosan-cellulose acetate blends

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