Physical Characteristics of Chitosan Based Film Modified With Silica and Polyethylene Glycol

Abstract

ABSTRACT

Adsorption of Ca(II), Mg(II), Zn(II), and Cd(II) on Chitosan Membrane Blended with Rice Hull Ash Silica and Polyethylene Glycol

“…Furthermore, C-O stretching vibration from C-O-H of chitosan (1151 cm -1 ) shifts to low wavenumber. These imply the existence of an attractive intermolecular interaction between chitosan and PEG, as suggested in the literature [10,[15][16]. Hence, the intermolecular interaction between chitosan and PEG may be ascribed to the hydrogen bond.…”

“…1 and the spectra of Ch and Ch/Si as the comparison are included as well. The increase in the intensity of 1000-1100 cm -1 in Ch/Si membrane suggests the formation of -Si-O-C bonds [15][16], since Si-O stretching appeared at the same wave number of C-O stretching. Peaks around 1240 and 842 cm -1 in FTIR spectra of Ch/Si/P membrane ( Fig.…”

“…Addition of PEG causing the pores in the Ch/Si membrane is reduced due to the physically trapped PEG on the solid surface. PEG is likely to accumulate on the top surface of the membrane, where maximum contact with water is possible during phase inversion [15][16]. SEM is a powerful tool to characterize the microscopical pore structure of membrane in qualitative manner.…”

“…Acidic media gives a pronounced effect on the swelling behavior compared to the neutral and basic media; swelling index decreased with increasing pH value. The water affinity improvement may increase the possibility of ion uptake into the internal active site of the membrane leading to absorption enhancement [16].…”

“…NaCl) [10][11][12][13][14][15][16]. Blending chitosan with compatible polymers such polyethylene glycol and silica results in spongy membranes also resulted in highly effective metal-affinity membranes [6,[14][15][16].…”