TY - JOUR
T1 - Charging behavior and stability of the novel amino group containing cellulose ester cellulose-4-[N-methylamino]butyrate hydrochloride
AU - Zarth, Cíntia Salomão Pinto
AU - Zemljič, Lidija Fras
AU - Čakara, Duško
AU - Bračič, Matej
AU - Pfeifer, Annett
AU - Stana-Kleinschek, Karin
AU - Heinze, Thomas
PY - 2012/8/28
Y1 - 2012/8/28
N2 - The charging behavior of water-soluble cellulose-4-[N-methylamino]butyrate hydrochloride (CMABH) with different degree of substitution (DS) is investigated by polyelectrolyte titration at different pH values. Samples of high DS (0.92) and low DS (0.31) exhibit a decrease in positively charged groups from pH 2 (3.9 and 1.9 mmol g-1) to pH 9 (0.81 and 0.65 mmol g-1) due to the deprotonation of the ammonium groups. The stability of the ester linkage of CMABH is examined as a function of pH value and storage time (up to 28 d). A hydrolysis of the ester moiety is evident after 2 h at pH 8, which is also proved by ATR-FTIR- and Raman spectroscopy.
AB - The charging behavior of water-soluble cellulose-4-[N-methylamino]butyrate hydrochloride (CMABH) with different degree of substitution (DS) is investigated by polyelectrolyte titration at different pH values. Samples of high DS (0.92) and low DS (0.31) exhibit a decrease in positively charged groups from pH 2 (3.9 and 1.9 mmol g-1) to pH 9 (0.81 and 0.65 mmol g-1) due to the deprotonation of the ammonium groups. The stability of the ester linkage of CMABH is examined as a function of pH value and storage time (up to 28 d). A hydrolysis of the ester moiety is evident after 2 h at pH 8, which is also proved by ATR-FTIR- and Raman spectroscopy.
KW - amino group-containing cellulose esters
KW - cellulose-4-[ N -methylamino]butyrates
KW - hydrolytic stabilities
KW - polyelectrolyte titrations
KW - potentiometric titrations
UR - http://www.scopus.com/inward/record.url?scp=84865204747&partnerID=8YFLogxK
U2 - 10.1002/macp.201200057
DO - 10.1002/macp.201200057
M3 - Article
AN - SCOPUS:84865204747
SN - 1022-1352
VL - 213
SP - 1669
EP - 1676
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
IS - 16
ER -