Properties of quaternized and cross-linked hydroxyethylcellulose composite films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F24%3A63581499" target="_blank" >RIV/70883521:28110/24:63581499 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10570-024-06154-7" target="_blank" >https://link.springer.com/article/10.1007/s10570-024-06154-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10570-024-06154-7" target="_blank" >10.1007/s10570-024-06154-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Properties of quaternized and cross-linked hydroxyethylcellulose composite films

Popis výsledku v původním jazyce

Although trimetylammonium-2-hydroxypropyl-hydroxyethylcellulose (QHEC) is a well-known polysaccharide material, some of its properties have not been previously studied in detail. Therefore, we applied a combination of multidimensional nuclear magnetic resonance (NMR) in D2O on hydroxyethylcellulose (HEC) and HEC derivatives, and size-exclusion chromatography with multi-angle laser light scattering (SEC-MALS) in carbonate buffer at pH 10; while Fourier-transform infrared spectroscopy (FTIR), the X-ray diffraction (XRD), the thermogravimetry/differential/differential thermogravimetry (TG/DTG/DTA) and atomic force microscopy (AFM) in film form. SEC-MALS revealed various water-solubility of prepared derivatives: HEC (98%) &gt; CHEC (72%) &gt; QHEC (26%) &gt; QCHEC (14%). Due to its substituents, the HEC macromolecule forms coil structures with varying gyration radii: QHEC (38–260 nm) &gt; QCHEC (10–230 nm) &gt; CHEC (21–100 nm) &gt; HEC (23–50 nm). FTIR analysis of all prepared films confirmed their identical structure compared to that observed in liquid form in D2O. Onset temperatures (OT) of films degradation decreased in order: HEC (222 °C) &gt; QCHEC (162 °C) &gt; CHEC (142 °C) &gt; QHEC (141 °C). The X-ray diffraction confirmed residual crystallinity of cellulose II (CII) in all four types of prepared films and was linked to ~ 2% water-insolubility of HEC derivatives revealed by SEC-MALS. Atomic force microscopy (AFM) showed significant differences in surface morphology among the four prepared films with surface roughness of: HEC (25 nm) &gt; QCHEC (5.8 nm) &gt; QHEC (4.2 nm) &gt; CHEC (2.8 nm). Various spherical particles were found in case of HEC, circular depressions/holes approximately 4 μm in diameter were observed in case of QHEC. Except for the HEC, all other films showed granular surface probably due to insoluble components. Based on the mechanisms of quaternization and crosslinking and the results of analysis on water-soluble part and films we could assume that there are similarities in structures between the soluble and insoluble products of the reactions.

Název v anglickém jazyce

Properties of quaternized and cross-linked hydroxyethylcellulose composite films

Popis výsledku anglicky

Although trimetylammonium-2-hydroxypropyl-hydroxyethylcellulose (QHEC) is a well-known polysaccharide material, some of its properties have not been previously studied in detail. Therefore, we applied a combination of multidimensional nuclear magnetic resonance (NMR) in D2O on hydroxyethylcellulose (HEC) and HEC derivatives, and size-exclusion chromatography with multi-angle laser light scattering (SEC-MALS) in carbonate buffer at pH 10; while Fourier-transform infrared spectroscopy (FTIR), the X-ray diffraction (XRD), the thermogravimetry/differential/differential thermogravimetry (TG/DTG/DTA) and atomic force microscopy (AFM) in film form. SEC-MALS revealed various water-solubility of prepared derivatives: HEC (98%) &gt; CHEC (72%) &gt; QHEC (26%) &gt; QCHEC (14%). Due to its substituents, the HEC macromolecule forms coil structures with varying gyration radii: QHEC (38–260 nm) &gt; QCHEC (10–230 nm) &gt; CHEC (21–100 nm) &gt; HEC (23–50 nm). FTIR analysis of all prepared films confirmed their identical structure compared to that observed in liquid form in D2O. Onset temperatures (OT) of films degradation decreased in order: HEC (222 °C) &gt; QCHEC (162 °C) &gt; CHEC (142 °C) &gt; QHEC (141 °C). The X-ray diffraction confirmed residual crystallinity of cellulose II (CII) in all four types of prepared films and was linked to ~ 2% water-insolubility of HEC derivatives revealed by SEC-MALS. Atomic force microscopy (AFM) showed significant differences in surface morphology among the four prepared films with surface roughness of: HEC (25 nm) &gt; QCHEC (5.8 nm) &gt; QHEC (4.2 nm) &gt; CHEC (2.8 nm). Various spherical particles were found in case of HEC, circular depressions/holes approximately 4 μm in diameter were observed in case of QHEC. Except for the HEC, all other films showed granular surface probably due to insoluble components. Based on the mechanisms of quaternization and crosslinking and the results of analysis on water-soluble part and films we could assume that there are similarities in structures between the soluble and insoluble products of the reactions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Cellulose

ISSN

0969-0239

e-ISSN

1572-882X

Svazek periodika

31

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

10341-10357

Kód UT WoS článku

001339240500001

EID výsledku v databázi Scopus

2-s2.0-85206995564