The results showed that the surface roughness of PBO fiber can be improved greatly after etching for 3 min in a 5% solution by mass fraction, swelling for 12 h in presence of swelling agent K at 70t and mechanical cutting for 8 min.
5%的刻蚀液刻蚀3 min,70℃下润胀剂K 润胀12 h和物理剪切8 min后,PBO纤维表面粗糙程度得到很大提高,其主干被藤状的微细纤维缠绕,有部分原纤从主干上脱落,纤维的比表面积从原纤的0。
Ultrasound treatment and alkali swelling were applied to activate microcrystalline cellulose (MCC) in order to improve its reactivity performance.
分别采用超声波与碱润胀对微晶纤维素进行活化,比较了两种方法对微晶纤维素(MCC)超分子结构和物理特性的影响,并通过与高碘酸钠的反应分析了不同活化方法对微晶纤维素选择性氧化性能的影响,初步探讨了其作用机理。