Preparation and flocculation properties of cationic starch/chitosan crosslinking-copolymer

Molecular spectroscopic analysis of nano-chitosan blend as biosensor

“…As mentioned earlier; the FTIR spectra of the, starch consists of three characteristic bands between 1006 and 1154 cm −1 , which are attributed to the C-O bond stretching [18]. The band at 1654 cm −1 is assigned to the OH bending of water [18]. The band at 1467 cm −1 is assigned to the CH2 bending.…”

“…The band at 1954 cm −1 is the characteristic absorption band of NH 2 . The band at 1657 was due to the OH of chitosan [18]. The band at 1519 cm −1 is due to the scanty amount of O C-NH 2 .…”

“…An intense band at 1654 cm −1 was assigned to the first overtone of the OH bending vibration. The bands at 1154 and 2929 cm −1 were assigned to C-O stretching and CH stretching, respectively [18]. Two strong bands at 1082 and 1006 cm −1 were attributed to CH 2 -O-CH 2 stretching vibrations [18].…”

“…An extremely broad band occurs at 3408 cm −1 due to the hydrogen-bonded hydroxyl groups that contribute to the complex vibrational stretches associated with free inter-and intramolecular bound hydroxyl group, which make up the gross structure of starch [25]. In chitosan, the band at 2921 cm −1 is typical of CH stretching vibration [18]. The band at 1739 cm −1 suggested the presence of carbonyl group.…”

Preparation and Evaluation of Alcohol-Alkaline-Treated Rice Starch as a Tablet Disintegrant

“…MRS showed an obvious change of the peak in the region of 950 -900 cm -1 when compared with RS, suggesting an alteration of skeletal mode vibration of α-1,4 glycosidic linkage [14]. Moreover, MRS and RS gave similar peaks at approximately 1020, 1079 and 1155 cm -1 , corresponding to C-O-H and CH 2 -O-CH 2 bonds of glucose structures [13,15,16]. These results suggested that the backbone glucose units of starch were not changed after modification.…”