增湿强剂PAEP的制备及性能

Synthesis and Properties of Novel PAEP Wet Strength Agent

摘要:

采用聚乙烯醇（PVA）对传统湿增强剂聚酰胺多胺环氧氯丙烷(PAE)树脂进行化学改性，制备了一种PAEP湿增强剂。并在抄纸过程中引入PAEP与有机硼复合湿强剂，进一步增加纤维间的交联。采用IR、SEM、Zeta 电位仪、TG对其结构、性能进行了表征；探讨了PAEP在纤维中的吸附行为，以及PAE、PAEP、PAEP-有机硼用量对纸张湿强性能的影响。结果表明，随着PAEP加入量由2.5 mg/g增加到30 mg/g，其在纤维中的吸附量从2.3 mg/g增加8.1 mg/g，吸附率由81.8 %降低到21.12 %；与PAE相比，经PAEP、PAEP-有机硼处理后的纸张热降解残渣量分别增多122.67 %, 269.60 %；当PAEP-有机硼中有机硼的质量分数为50 %时，纸张的干、湿抗张指数分别提高22.5 %和101.41 %，抗张指数保留率增加69.20 %。在相同质量下，与阳离子聚丙烯酰胺和阳离子淀粉相比，PAEP-有机硼复合湿强剂亦具有较佳的增强效果。

Abstract:

A novel wet strength agent PAEP was prepared through chemical modification of polyamide-polyamine epichlorohydrin (PAE) resin with polyvinyl alcohol (PVA). PAEP/organoboron composite wet strength agent was also introduced in the papermaking process to increase the crosslinking among fibers. The corresponding structure and properties were characterized by IR, SEM, Zeta potential analysis and TG. The adsorption behavior of PAEP in fiber was investigated, as well as the effects of PAE, PAEP and PAEP-organoboron dosage on the wet strength of paper. It was found that the adsorption amount of PAEP in fiber increased from 2.3 mg/g to 8.1 mg/g with the increase of PAEP dosage from 2.5 mg/g to 30 mg/g, whereas the adsorption efficiency decreased from 81.8% to 21.12%. In comparison with PAE, the thermal degradation residue of papers treated with PAEP and PAEP-organoboron increased by 122.67% and 269.60%, respectively. The dry, wet tensile index increased by 22.5% and 101.41% when the organoboron content in PAEP-organoboron was 50%. And the retention rate of tensile index increased by 69.20%. Compared with cationic polyacrylamide (CPAM) and cationic starch, the PAEP-organoboron wet strength agent was also endowed with better strengthening efficiency.