Effects of low-temperature surface-wave plasma treatment with various gases on surface modification of chitosan

Oginö, Kazuhíde; Král, Martin; Yamashita, Mitsuji; Nagatsu, Masaaki

doi:10.1016/j.apsusc.2008.07.119

Cited by 30 publications

(16 citation statements)

References 39 publications

(44 reference statements)

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“…The advantages of EBP-treatment with respect to gas discharge plasmas have been discussed in our previous papers [ 17 , 18 , 19 ]. Furthermore, the effective controllable destruction of polysaccharides occurs due to the EBP-hydrolysis, whereas the treatment in gas discharge plasmas mostly results in biomaterial oxidation and an improvement of its hydrophilic properties [ 42 , 43 , 44 ].…”

Section: Discussionmentioning

confidence: 99%

Chitin and Cellulose Processing in Low-Temperature Electron Beam Plasma

et al. 2017

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Polysaccharide processing by means of low-temperature Electron Beam Plasma (EBP) is a promising alternative to the time-consuming and environmentally hazardous chemical hydrolysis in oligosaccharide production. The present paper considers mechanisms of the EBP-stimulated destruction of crab shell chitin, cellulose sulfate, and microcrystalline cellulose, as well as characterization of the produced oligosaccharides. The polysaccharide powders were treated in oxygen EBP for 1–20 min at 40 °C in a mixing reactor placed in the zone of the EBP generation. The chemical structure and molecular mass of the oligosaccharides were analyzed by size exclusion and the reversed phase chromatography, FTIR-spectroscopy, XRD-, and NMR-techniques. The EBP action on original polysaccharides reduces their crystallinity index and polymerization degree. Water-soluble products with lower molecular weight chitooligosaccharides (weight-average molecular mass, Mw = 1000–2000 Da and polydispersity index 2.2) and cellulose oligosaccharides with polymerization degrees 3–10 were obtained. The 1H-NMR analysis revealed 25–40% deacetylation of the EBP-treated chitin and FTIR-spectroscopy detected an increase of carbonyl- and carboxyl-groups in the oligosaccharides produced. Possible reactions of β-1,4-glycosidic bonds’ destruction due to active oxygen species and high-energy electrons are given.

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Section: Discussionmentioning

confidence: 99%

Chitin and Cellulose Processing in Low-Temperature Electron Beam Plasma

et al. 2017

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“…Some antibacterial activities have been described with chitosan and modified chitosan derivatives. [1][2][3][4][5] However, chitosan shows its biological activity only in acidic medium because of its poor solubility above pH 6.5. Thus, water soluble chitosan derivatives which are soluble in both acid and basic physiologic circumstances might be good candidates for a polycationic biocide.…”

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confidence: 99%

Synthesis and Characterization of Chitosan Biguanidine Hydrochloride under Microwave Irradiation

Zhao

Yi-zhen³

2009

Polym. J.

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Chitosan biguanidine hydrochloride was synthesized by reacting chitosan with dicyandiamide under microwave irradiation. The influence of reaction temperature, reaction solvent and microwave heating time was studied, and optimal conditions were identified. The representative microwave synthesized chitosan biguanidine hydrochloride was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction measurement, taking chitosan as a reference. The solubility pH for the chitosan biguanidine hydrochloride with different substitution degrees was monitored. The antimicrobial activities of chitosan biguanidine hydrochloride were measured by means of the minimal inhibition concentration (MIC). In vitro antimicrobial activity of guanidinylated chitosans with different substitution degrees were evaluated against staphylococcus aureus, bacillus subtilis, escherichia coli and pseudomonas aeruginosa. The results show that the microwave irradiation method can increase the reaction rate by twelve times over the conventional method. Chitosan biguanidine hydrochloride are effective of bacteriostasis, compared with chitosan, guanidinylated chitosan had much better antibacterial activity. The antibacterial activity of chitosan biguanidine hydrochloride derivative enhanced with increasing substitution degrees of guanidinylated chitosan.

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“…As for biomedical applications, plasma‐treated chitosan films were used to control blood clotting properties, as well as cell adhesion and proliferation . Many reports were focused on evaluating chitosan surface structure and properties as a function of discharge type and duration of current, treatment, working gas nature and pressure etc . However, to our knowledge, there are no publications describing the effect of plasma treatment as a function of chitosan chemical structure.…”

Section: Introductionmentioning

confidence: 99%

“…Plasma modification of chitosan films and membranes was used to control their permeability in filtration and packaging technology . As for biomedical applications, plasma‐treated chitosan films were used to control blood clotting properties, as well as cell adhesion and proliferation . Many reports were focused on evaluating chitosan surface structure and properties as a function of discharge type and duration of current, treatment, working gas nature and pressure etc .…”

Section: Introductionmentioning

confidence: 99%

DC Discharge Plasma Modification of Chitosan Films: An Effect of Chitosan Chemical Structure

Демина

Drozdova

Yablokov

et al. 2015

Plasma Processes & Polymers

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Surface plasma treatment of chitosan films is a widely used technique to control a variety of their properties, such as permeability, hemostatic activity and ability to support cell adhesion, proliferation and growth. Among other factors to be controlled, the chemical structure of initial chitosan is rarely taken into consideration. This work is aimed to highlight this factor by the example of low pressure direct-current discharge of various chitosan film samples. Contact angle measurements, X-ray photoelectron spectroscopy and scanning electron microscopy revealed differences in the film surface properties of the initial and plasma-treated films. The effect of the plasma treatment on cell viability of L929 mouse fibroblasts was studied by MTT-assay.

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Effects of low-temperature surface-wave plasma treatment with various gases on surface modification of chitosan

Cited by 30 publications

References 39 publications

Chitin and Cellulose Processing in Low-Temperature Electron Beam Plasma

Chitin and Cellulose Processing in Low-Temperature Electron Beam Plasma

Synthesis and Characterization of Chitosan Biguanidine Hydrochloride under Microwave Irradiation

DC Discharge Plasma Modification of Chitosan Films: An Effect of Chitosan Chemical Structure

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