Preparation of Carboxymethyl Hemicellulose and Its Application with Polyamide Epichlorohydrin Resin as Wet Strength Additive [羧甲基半纤维素的制备及其与湿强剂PAE的联用]

作者：Song F.; Wei Q.; Ma H.; Liu X.; Wu S.

来源：China Pulp and Paper, 2019, 38(3): 9-15.

DOI：10.11980/j.issn.0254-508X.2019.03.002

• Carboxymethyl hemicellulose
• Etherification
• Polyamide epichlorohydrin resin
• Wet strength

Carboxymethyl hemicellulose (CMX) with high carboxyl content and high molecular weight was prepared by etherification process,and applied with epichlorohydrin resin to improve the wet strength of paper. The preparation conditions were studied such as the alkaline dosage, the alkalization time, the alkalization temperature, the dosage of etherifying agent, the etherification temperature and the etherification time, the optimal preparation process was explored as follows: the alkalization was carried out for 1 h at room temperature after addition of aqueous NaOH, the molar ratio of hemicellulose and NaOH was 1:2, the etherification was carried out for 5 h and the etherification temperature was 55℃, the molar ratio of hemicellulose and etherification agent was 1:1. The wet strength index of the paper reached 9.63 N·m/g when CMX and PAE additions were 4.8% and 2.0% respectively, which was 25.8% higher than that of using PAE alone.

• 单位
  华南理工大学; 制浆造纸工程国家重点实验室