Preparation and characterization of cationic poly vinyl alcohol with a low degree of substitution |
| |
| Authors: | Pedram Fatehi Robin Singh Zainab Ziaee Huining Xiao Yonghao Ni |
| |
| Institution: | aDepartment of Chemical Engineering, Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, NB, Canada E3B 5A3;bDepartment of Chemical Engineering, Indian Institute of Technology, Kharagpur, India |
| |
| Abstract: | The cationization of polymers has been regarded as an effective method to improve their performance for various applications. In this work, the cationization of poly vinyl alcohol (PVA) was investigated under different conditions, i.e., various glycidyl-trimethylammonium chloride (GTMAC) to PVA ratios, reaction temperatures, times, PVA and NaOH concentrations and solvent compositions. The results showed that the overall efficiency of the cationic modification was rather low, which was due to the hydrolysis of both GTMAC and cationic-modified PVA (CPVA) under the strong alkaline conditions employed. The results also showed that the optimum GTMAC/PVA ratio depended on the solvent composition. The cationization was confirmed by means of 1H NMR and FTIR analyses. The maximum efficiency in water was obtained under the conditions of 95 °C, 1 h, 0.5 (mol) GTMAC/PVA ratio, and 5% (mol) NaOH concentration, while that in the ethanol/DMSO mixture (1.25 v/v) was obtained under the conditions of 70 °C, 1 h, 0.5 (mol) GTMAC/PVA ratio, and 5% (mol) NaOH concentration. Additionally, the interaction of CPVAs with a silicon wafer (as a substrate) was determined by employing an atomic force microscope (AFM) in water and air. |
| |
| Keywords: | Cationization Poly vinyl alcohol AFM NMR FTIR Polymer |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
