Crosslinked chitosan—preparation and characterization

Prashanth, K. V. Harish; Tharanathan, R. N.

doi:10.1016/j.carres.2005.10.016

Cited by 70 publications

(37 citation statements)

References 22 publications

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“…Crosslinking of chitosan due to attack of potassium peroxydisulfate on chitosan chains and subsequent recombination has been reported. 30 It cannot be excluded that such a type of cross-linking has also taken place in the case of photo-mediated cross-linking of the nano-fibre QCh/PVA mats. It was found that adding the photoinitiator 2,2-dimethoxy-2-phenylacetophenone (DMPA), ammonium peroxydisulfate and TEGDA as cross-linking agent to the QCh/PVA mixed solution did not impede the electrospinning process and the nano-fibre formation (Fig.…”

Section: Photo-mediated Cross-linking Of the Electrospun Qch/ Pva Nanmentioning

confidence: 98%

Electrospun nano-fibre mats with antibacterial properties from quaternised chitosan and poly(vinyl alcohol)

Ignatova

Starbova

Маркова

et al. 2006

Carbohydrate Research

326

183

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Section: Photo-mediated Cross-linking Of the Electrospun Qch/ Pva Nanmentioning

confidence: 98%

Electrospun nano-fibre mats with antibacterial properties from quaternised chitosan and poly(vinyl alcohol)

Ignatova

Starbova

Маркова

et al. 2006

Carbohydrate Research

326

183

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“…In this research, we observed that the effects of potassium persulfate and monocarboxylic acids (acetic, lactic and formic acids) in the chitosan solution would degrade and shorten the chitosan chain with a distribution of nanosized particles. To stop the reaction and deactivation of persulfate anions, the system temperature of 70 o C was suddenly decreased to 5 o C. The amino groups from chitosan cross-linked with other amino groups of chitosan via sulfate anions, forming the sulfate bridge (Al-Remawi, 2012;Harish Prashanth & Tharanathan, 2006). In this research, the proposed mechanisms to produce chitosan were adopted from the previous study by Hsu et al (2002), as shown in Figures 3A and 3B.…”

Section: General Mechanisms Of Reaction Studiesmentioning

confidence: 99%

Effects of Monocarboxylic Acids and Potassium Persulfate on Preparation of Chitosan Nanoparticles

Kusrini¹,

Ng²,

Harahap³

et al. 2015

IJTech

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In this research, we studied the preparation of nanochitosan from the addition of potassium persulfate as an initiator for monomer polymerization and monocarboxylic acid-namely acetic acid, lactic acid, and formic acid-to a chitosan solution. To obtain the dried form of chitosan nanoparticles, we investigated the effects of oven and spray drying systems toward the physicochemical properties and morphology of chitosan nanoparticles. Successfully prepared chitosan nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), Field Emission Scanning Microscopy/Energy Dispersive X-ray Analysis (FESEM-EDX), and a particle size analyzer (PSA). The structures of nanochitosan prepared in different acids were quite similar based on the FTIR spectra. By increasing the concentrations of potassium persulfate, the yields of chitosan nanoparticles also increased. The concentration of potassium persulfate had a significant influence on the production of chitosan nanoparticles. The lowest concentration of potassium persulfate (0.6 mmol) did not produce an observable formation of chitosan nanoparticles. By using formic acid and potassium persulfate in various concentrations from 1.2-3.0 mmol, chitosan nanoparticles were obtained. A particle size distribution of chitosan nanoparticles was produced from a formic acid solution having a smaller size compared to others. The acidity effect of monocarboxylic acids in the formation of chitosan nanoparticles was better compared to the addition of other acids. Furthermore, synthesized chitosan nanoparticles (50-110 nm) produced from formic acid solutions have potential applications for drug carrier purposes.

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“…Chitosanolysis leads to the production of COS with different degree of polymerization containing various sequences of GluN and GluNAc by breaking O-glycosidic bonds in chitosan. Chitosanolysis can be done by different methods using acid hydrolysis, enzymatic hydrolysis, oxidative reductive methods by hydrogen peroxide (Tian et al,010) or persulfate (Harish Prashanth and Tharanathan, 2006) and physical methods. Different acid used for chitosanolysis are HCl (Kasaai et al, 2013), H 2 SO 4 (Zamani and Taherzadeh, 2010), NaNO 2 (Hussain et al, 2012), formic acid (Yamaguchi et al,1982), lactic acid (Il'ina and Varlamov 2004) etc.…”

Section: Introductionmentioning

confidence: 99%

Extraction and characterization of chitin, chitosan and chitooligosaccharides from crab shell waste

Varun

Senani

Kumar

et al. 2017

IJAR

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An experiment was carried out to utilize the crab shell waste for the production of chitin by chemical extraction method. The obtained chitin was processed to make the more useful compound chitosan by deacetylation of chitin using strong NaOH solution at high temperature. Yield of chitin and chitosan from crab shell waste was found to be 12.2 % and 10.54 %, respectively. Chitosan was further used to produce chito-oligosaccharides (COS) by acid hydrolysis using 0.5 N H 2 SO 4 , 1N H 2 SO 4 and 7N HCl at hourly intervals upto 6 hours and the average yield was 0.55, 0.84 and 1.93 mg/ml, respectively. Chitin and chitosan were characterized by Fourier Transform Infrared spectroscopy (FT-IR) technique which depicts different band representing various bonds present in the molecule and which were in agreement with the bands of standard chitin and chitosan. Further, COS were formed after acid hydrolysis of chitosan, which was characterized by Thin Layer Chromatography (TLC) using glucosamine as a standard.

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Crosslinked chitosan—preparation and characterization

Cited by 70 publications

References 22 publications

Electrospun nano-fibre mats with antibacterial properties from quaternised chitosan and poly(vinyl alcohol)

Electrospun nano-fibre mats with antibacterial properties from quaternised chitosan and poly(vinyl alcohol)

Effects of Monocarboxylic Acids and Potassium Persulfate on Preparation of Chitosan Nanoparticles

Extraction and characterization of chitin, chitosan and chitooligosaccharides from crab shell waste

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