中图分类号：TS79 文献标志码：A 文章编号：1673-3851（2025）07-0443-08

引用格式：，等．阳离子型聚丙烯酰胺的合成及其在纸上的应用[J]．浙江理工大学学报（自然科学），2025，53（4）：443-450.

Abstract： To solve the problem of poor physical properties of waste pulp-based paper，N，N-Dimethyl acrylamide （DMAA） was used as a branched crosslinking agent，sodium methacryloysulfonate （SMAS） as a chain transfer agent，ammonium persulfate （APS） as an initiator，sodium sulfite as a terminator， methacryloyldimethylamine ethyl ester（DM）as a cationic monomer，and cationic polyacrylamide （CPAM） dispersion was prepared by aqueous solution polymerization. The effects of diffrent amounts of branched crosslinking agents，chain transfer agents， initiators，monomers，and monomer solution pH （20 values on the performance of the CPAM dispersion were analyzed，and the relative molecular weight and viscosity properties of CPAM were optimized. With CPAM as flocculant，the paper was prepared by the paper-making experiment，and the influence of the flocculation of the CPAM dispersion on the physical properties of the paper was analyzed. The results show that when the quality fraction of the branched crosslinking agent， the chain transfer agent， the initiator and monomer was 3.2% ， 0.8% ， 0.47% and 25% ，respectively， the monomer solution pH was 3，and the nitrogen gas flow rate was 60% ，the performance of the CPAM dispersion was best. At the same time，the dispersion was applied to the paper making of waste paper pulp. When the mass fraction of the CPAM dispersion was 0.6% ，the bursting strength of the paper reached 2.14kPa∙m²/g ，the internal bonding strength was 160.5J/m² ，which were respectively raised by 30.5% and 59.5% compared with the blank sample. The CPAM dispersion prepared herein has great application potential in the paper-making industry，and also provides theoretical reference for the performance study of CPAM for waste pulp paper.

Key words： cationic polyacrylamide； aqueous solution polymerization； molecular weight； viscosity;paper strength

0 引言

废纸浆，也称再生浆，是由多种不同品种和性质的废纸与纸板加工而成[1]。在中国，废纸回收量与回收率均呈现出逐年增长的态势。从纸浆细分市场的供给结构来看，废纸浆占据了约 70% 的市场份额，成为主流原料。尽管废纸浆的回收利用市场潜力巨大，但其回收再利用所面临的挑战不容忽视，如废纸纤维较短、机械性能欠佳，这些问题直接导致所制备纸张产品的强度性能不佳。因此，通过提升废纸浆所制纸张的物理性能满足市场对高品质纸张的需求显得非常重要。

聚丙烯酰胺（Polyacrylamide，PAM）作为一种水溶性高分子化学物，因其广泛的适用性而在造纸、采油、选矿、纺织、环保、黏合剂及皮革复鞣剂等多个领域中占据重要地位2。在众多制备方法中，水溶性聚合法凭借其工艺简单、聚合转化率高且对环境友好的特点，成为制备PAM的主流方法[3]。该方法通常以水作为反应介质，反应过程易于控制且制作成本相对较低。通过水溶液聚合法制备的阳离子型聚丙烯酰胺（Cationicpolyacrylamide，CPAM），以乳液形态存在，展现出优异的水分散性。这一特性使得CPAM在无需任何后续处理的情况下即可直接使用，从而简化了工艺流程，并显著提升了成纸性和纸张质量[4]

CPAM的分子链含有带正电荷基团的阳离子，这些基团能够中和纸浆带中负电荷的纤维和填料颗粒，从而促进纸纤维之间的结合。……