Thermal Analysis of Chitosan Based Networks

Neto, C.G. da Trindade; Giacometti, J.A.; Job, Aldo Eloízo; Ferreira, Frederico Castelo; Fonseca, J. L. C.; Pereira, M.R.

doi:10.1016/j.carbpol.2005.02.022

Cited by 450 publications

(188 citation statements)

References 25 publications

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“…Another limitation of CHT as an adsorbent is lower thermal stability. At 500 ∘ C, the weight retention of pure chitosan was found to be 48.5% [14]. If these properties can be improved by using other materials, then it will be an excellent candidate for various applications like wastewater treatment, packaging purpose, and so on.…”

Section: Introductionmentioning

confidence: 99%

“…Although Bijoypur clay has a high content of SiO 2 (70.08%), it has a substantial amount of Al 2 O 3 (27.24%) and fairly low impurity content such as Fe 2 O 3 (1.03%) and TiO 2 (1.65%) [17]. In many cases, clay materials have been shown to have higher adsorption capacity than that of activated carbon under the same condition because of its high specific surface area, high cation exchange capacity, and positive or negative surface charge against pH [14]. Considering these unique properties and cost effectiveness locally available kaolinite clay (Bijoypur clay) could be an ideal candidate for composite preparation with CHT.…”

Section: Introductionmentioning

confidence: 99%

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Facile Preparation of Biocomposite from Prawn Shell Derived Chitosan and Kaolinite-Rich Locally Available Clay

Biswas

Rashid

Mallik

et al. 2017

International Journal of Polymer Science

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A novel composite material was prepared from prawn shell derived chitosan (CHT) and locally available kaolinite-rich modified Bijoypur clay (MC) using a facile technique in which dilute acetic acid was used as a solvent for dissolving chitosan and composite fabrication whereas distilled water was used for preparing the clay dispersion. Bijoypur clay mainly consists of kaolinite clay mineral and it was modified with the dodecyl amine to make it organophilic. Morphology and properties of the composites (different weight ratio of MC and CHT) have been studied and compared with those of pure CHT and MC. Purification and modification of Bijoypur clay were investigated by X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier transformed infrared spectroscopy (FTIR) analyses. The fabrication of CHT-MC composites was confirmed by FTIR analysis. Thermogravimetric analysis (TGA) and differential scanning colorimetry (DSC) were used to investigate the thermal stability of the composites. It was observed that dispersed clay improves the thermal stability and enhances the hardness of the matrix systematically with the increase of clay loading. In this study, a better insolubility in both acidic and alkaline media of the composites is also observed compared to pure chitosan.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Biocomposite from Prawn Shell Derived Chitosan and Kaolinite-Rich Locally Available Clay

Biswas

Rashid

Mallik

et al. 2017

International Journal of Polymer Science

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“…It has been reported that the degradation of chitosan occurs in two separate steps, where the first step corresponds to dehydration and the second one to chitosan mass loss [16]. The first step is described as a result of the strong affinity of polysaccharides with water, as they can be easily hydrated [17]. Taboada et al [18] refers that the water loss occurs in the temperature range between 25-140 ºC, where the chitosan presents a mass loss between 4 and 7 %, and a strong polymer mass loss occurs between 190-410 ºC via the cleavage of glycosidic linkages.…”

Section: Introductionmentioning

confidence: 99%

Effect of neutralization and cross-linking on the thermal degradation of chitosan electrospun membranes

Correia

Gámiz-González

Botelho

et al. 2014

J Therm Anal Calorim

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Thermal degradation of as electrospun chitosan membranes and samples subsequently treated with ethanol and cross-linked with glutaraldehyde (GA) have been studied by thermogravimetry (TG) coupled with an infrared spectrometer (FTIR). The influence of the electrospinning process and cross-linking in the electrospun chitosan thermal stability was evaluated. Up to three degradation steps were observed in the TG data, corresponding to water dehydration reaction at temperatures below 100 ºC, loss of side groups formed between the amine groups of chitosan and trifluoroacetic acid between 150 -270 ºC and chitosan thermal degradation that starts around 250 ºC and goes up to 400 ºC. The Kissinger model was employed to evaluate the activation energies of the electrospun membranes during isothermal experiments and revealed that thermal degradation activation energy increases for the samples processed by electrospinning and subsequent neutralization and cross-linking treatments with respect to the neat chitosan powder.

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“…The first stage starts at 60°C with weight loss of 10%. The second stage begins at 240°C and reaches a maximum at 380°C with weight loss of 41.4% [18]. For chitosan-silica film (Fig.…”

Section: Thermal Analysismentioning

confidence: 95%

“…4B), the first stage of decomposition occurs between ambient and 200°C being accounted to around 14% weight loss, corresponding to dehydration of the films. The second stage of decomposition which starts from around 200 to 550°C is attributed to a weight loss due to the decomposition of polymeric network [15,[18][19][20]. For the chitosan-silica film, the second stage starts from 240 to 550°C with the weight loss of 60.0%.…”

Section: Thermal Analysismentioning

confidence: 99%

Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

2014

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Thermal Analysis of Chitosan Based Networks

Cited by 450 publications

References 25 publications

Facile Preparation of Biocomposite from Prawn Shell Derived Chitosan and Kaolinite-Rich Locally Available Clay

Facile Preparation of Biocomposite from Prawn Shell Derived Chitosan and Kaolinite-Rich Locally Available Clay

Effect of neutralization and cross-linking on the thermal degradation of chitosan electrospun membranes

Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

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