CMC-CSPI二元增强体系在废纸造纸中的应用研究

Asynthesis of Cationic Soy Protein Isolate(CSPI) and the Application of CMC-CSPI Binary System as Strengthening Additives in Deinked Pulp

关键词:  阳离子大豆分离蛋白  羧甲基纤维素  二元增强体系

Key Words:cationic soybean protein isolate  carboxymethylcellulose  binary strengthening system

摘要:讨探了自制阳离子大豆分离蛋白(CSPI)与羧甲基纤维(CMC)作为旧报纸脱墨浆纸张增强剂的协同应用效果。通过控制CMC与CSPI加入方式、用量等考察CMC-CSPI二元增强体系对纸张物理性能的影响。结果表明，CMC-CSPI二元增强体系以混合的方式加入,CMC用量为0.5%，CSPI用量为2.5%（均相对绝干浆），增强效果比单独使用CMC或CSPI效果都好；对浆料滤水性能、细小组分留着率的改善效果优于CMC，但不如CSPI的改善效果。

Abstract:The synergetic effect of cationic soy protein isolate (CSPI) and carboxymethyl cellulose (CMC) as the strengthening agents in papermaking was studied in this study. The parameters, including adding order or molar ratio of CSPI and CMC, were controlled to evaluate the effect of this binary strengthening system on the physical properties of the paper. It was found that CMC and CSPI mixed together on 0.5∶2.5 mass ratio and was used as strengthening binary system had a better strengthening effect than that of CMC or CSPI single system. Using CMC-CSPI binary system as strengthening additives the pulp drainage and fines retention were better than using CMC single system, but not as good as using CSPI single system.