表面活性剂改善黏胶级竹溶解浆的反应性能

Improving the Reactivity of Bamboo Dissolving Pulp for Viscose Rayon Production by Surfactant Treatment

中文关键词:  表面活性剂  竹溶解浆  反应性能  黏胶过滤性能  表面张力

Key Words:surfactant  bamboo dissolving pulp  reactivity  viscose filterability  surface tension

中文摘要:

      采用太古油（TRO）、聚氧乙烯蓖麻油（PCO）、聚醚多元醇（PP）3种表面活性剂对竹溶解浆原料进行处理，以改善竹溶解浆的反应性能；考察了不同表面活性剂及其用量对竹溶解浆Fock反应性能及黏胶过滤性能的影响，得到竹溶解浆反应性能改善效果最佳的表面活性剂及其优化用量，并研究了Fock反应性能与黏胶过滤性能的关系；分析及比较了上述3种表面活性剂在最优条件下对竹溶解浆的孔隙结构及比表面积、碱液的表面张力、黏胶流变行为的影响，揭示了表面活性剂改善竹溶解浆反应性能的机理。结果表明，TRO对竹溶解浆反应性能的改善效果最优，最佳用量为1.5%，此时，Fock反应性能及黏胶过滤值分别为81.7%和96.9 s，且当Fock反应性能超过77%时，所得的黏胶均能够达到过滤要求；TRO对竹溶解浆比表面积及孔隙结构的改善效果最好，并显著降低碱液的表面张力和提高黏胶的表观黏度，这与竹溶解浆反应性能的改善一致。

Abstract:

      Three kinds of surfactants including Turkey Red Oil （TRO）， Polyoxyethylene Castor Oil （PCO） and Polyether Polyol （PP） were used for improving the reactivity of bamboo dissolving pulp. The effects of different surfactants and their dosages on the Fock reactivity and viscose filterability/reactivity of bamboo dissolving pulp were investigated. The best surfactant and its optimized dosage were obtained， and the relationship between Fock reactivity and viscose filterability was also studied. Under the optimum conditions， by analyzing and comparing the effects of the above three kinds of surfactants on pore structure, specific surface area of the pulp， surface tension of lye and rheological behavior of viscose， the mechanism of reactivity improvement of surfactant treatment was revealed. The results showed that TRO had the best effect on improving the reactivity of the bamboo dissolving pulp. The optimum dosage of TRO was 1.5%. Under this condition， the Fock reactivity and the viscose filterability were 81.7% and 96.9 s， respectively. When the Fock reactivity of bamboo dissolving pulp exceeded 77%， the obtained viscose could meet the filterability requirements. TRO had the best effect on improving the specific surface area and pore structure of bamboo dissolving pulp， and significantly reduced the surface tension of lye and increased the apparent viscosity of the viscose， which was accorded with the improvement of the reactivity of the bamboo dissolving pulp．