Preparation and characterization of cationic poly vinyl alcohol with a low degree of substitution

被引:16
|
作者
Fatehi, Pedram [1 ]
Singh, Robin [1 ]
Ziaee, Zainab [1 ,2 ]
Xiao, Huining [1 ]
Ni, Yonghao [1 ]
机构
[1] Univ New Brunswick, Dept Chem Engn, Limerick Pulp & Paper Ctr, Fredericton, NB E3B 5A3, Canada
[2] Indian Inst Technol, Dept Chem Engn, Kharagpur 721302, W Bengal, India
基金
加拿大自然科学与工程研究理事会;
关键词
Cationization; Poly vinyl alcohol; AFM; NMR; FTIR; Polymer; FUNCTIONAL MODIFICATION; POLY(VINYL ALCOHOL); CELLULOSE FIBERS; STARCH; COPOLYMERIZATION; DERIVATIVES; ADSORPTION; FORCES; FTIR;
D O I
10.1016/j.eurpolymj.2011.02.021
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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 H-1 NMR and FTIR analyses. The maximum efficiency in water was obtained under the conditions of 95 degrees 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 degrees 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. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:997 / 1004
页数:8
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