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以丙烯酰胺和甲基丙烯酰氧基乙基三甲基氯化铵与纸浆纤维接枝共聚制备了阳离子硫酸盐浆。实验结果表明,当引发剂硝酸铈铵的用量(对绝干浆)从2%提高到8%时,纸浆的接枝率和阳离子表面电荷密度稳步提高;进一步提高引发剂的用量,纸浆的接枝率和阳离子表面电荷密度变化平坦。随着反应温度的升高,纸浆的接枝率和阳离子表面电荷密度先升后降,当温度为50℃时接枝率和阳离子表面电荷密度最高。在浆浓较低时,随着浆浓的提高,接枝率和阳离子表面电荷密度提高,当浆浓超过11%时,接枝率和阳离子表面电荷密度下降。当甲基丙烯酰氧基乙基三甲基氯化铵在总单体中摩尔比例为40%～50%时表面电荷密度最高。通过红外光谱分析发现,丙烯酰胺和甲基丙烯酰氧基乙基三甲基氯化铵已成功地接枝到硫酸盐浆上。
Cationic kraft pulp was prepared by graft copolymerization of acrylamide and methacryloyloxyethyltrimethylammonium chloride onto pulp fibers. The experimental results show that when the amount of initiator cerium ammonium nitrate (absolute dry pulp) increased from 2% to 8%, the grafting rate and cationic surface charge density increased steadily; further increase the amount of initiator, Branching rate and cationic surface charge density changes flat. With the increase of the reaction temperature, the grafting degree of the pulp and the surface charge density of the cation first increased and then decreased. The graft ratio and the cationic surface charge density were the highest when the temperature was 50 ℃. At low pulp consistency, the grafting rate and cationic surface charge density increase with increasing pulp consistency, and the grafting rate and the cationic surface charge density decrease when the pulp consistency exceeds 11%. When the methacryloyloxyethyl trimethyl ammonium chloride in the total monomer molar ratio of 40% to 50%, the highest surface charge density. It has been found by infrared spectroscopy that acrylamide and methacryloyloxyethyltrimethylammonium chloride have been successfully grafted onto the kraft pulp.