Temat: emulsification - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Preparation of micro and nanostructures of chitosan by ultrasonic coalescence of w/o emulsions
Autorzy:: Balcerzak, Jacek
Kucharska, Magdalena
Gruchała, Bogdan
Powiązania:: https://bibliotekanauki.pl/articles/1035322.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: chitosan
microspheres
nanospheres
precipitation
ultrasonic emulsification
Opis:: In the paper, the preeliminary study of chitosan micro and nanospheres precipitation due to two reverse emulsions (W/O) coalescence is described. The composition conditions, which must be filled to obtain stable reverse emulsion is pointed out. Furthermore, the parameters of ultrasonic emulsification and coalescence technique are presented and finally, morphological study of obtained micro and nanospheres are discussed.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2013, 18, 18; 13-20
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Chitosan and chitosan-polyethylenimine microspheres prepared by membrane emulsification and their application for drug delivery systems
Autorzy:: Wolska, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/1034551.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: chitosan
membrane emulsification
microspheres
polyethyleneimine
release
sorption
Opis:: The aim of this paper was to prepare chitosan microspheres characterised by a narrow dispersion of dimensions, suitable for application for drug delivery systems (DDS). The materials, unmodified as well as functionalised using polyethyleneimine were then used for encapsulation of drug-mimicking dyes. The polymeric beads were prepared by one stage process of membrane emulsification. The encapsulation and then evaluation of the release of an active component was carried out using two cytostatics-mimicking dyes: methyl orange and Congo red. The efficiency of encapsulation changed with a type of microspheres and the type of a dye. The highest sorption towards dyes was revealed by PEI-modified chitosan microspheres. Methyl orange was released with the better efficiency than Congo red from all types of microspheres.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 220-235
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Chitosan microspheres prepared by membrane emulsification for chromium removal from aqueous solutions
Autorzy:: Wolska, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/1034646.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: biosorption
chitosan
chromium VI
membrane emulsification
microspheres
modification
Opis:: Chitosan is naturally abundant biopolymer that could be used as chelating sorbent for removal of metal ions from aqueous solutions. In this study the uniform-sized chitosan microspheres and their modified derivatives were prepared by using the one stage membrane emulsification process. The obtained sorbents were used for removal of chromium VI ions. The sorption evaluation was carried out at different initial ion concentrations and allowed to fit the experimental data to Langmuir isotherm in the case of unmodified materials and to Freundlich isotherm in the case of modified microspheres. The highest sorption towards chromium has been shown by unmodified chitosan with medium molecular weight. The calculated maximum sorption capacity for this polymer was found to be 1.6 mmol/g.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2016, 21; 203-216
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Emulsification parameters study on micelles formation from hydrophobically modified chitosan
Autorzy:: Piegat, Agnieszka
Niemczyk, Agata
Goszczyńska, Agata
Powiązania:: https://bibliotekanauki.pl/articles/2131523.pdf
Data publikacji:: 2021
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:: emulsification
hydrophobically modified chitosan
micelles
self-assembly
amphiphilic properties
Opis:: A series of N,O-acylated chitosan derivatives were emulsified with different fatty acids. Hydrophobically modified chitosan derivatives were expected to exhibit self-assembly behaviour resulting in micelle formation. Several parameters of the oil-in-water emulsification process were investigated: mixing method, speed and duration, volume oil phase and addition of modifiers. Their influence on micellar Z-average diameter, size distribution and Zeta potential was analysed based on dynamic light scattering measurements. There were various relations between the hydrodynamic behaviour of chitosan derivatives, their chemical structure and the process parameters. Additionally, the obtained micelles could serve as active compound carriers because they encapsulated two model substances, namely ibuprofen and α-tocopherol.
Źródło:: Progress on Chemistry and Application of Chitin and its Derivatives; 2021, 26; 178-190
1896-5644
Pojawia się w:: Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:: Biblioteka Nauki

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