In this work, we report a new characterization method using fluorescent cellulose nanofibrils to analyze retention and loss rates in the papermaking process. Cellulose nanofibrils (CNF) were isolated from chemical pulp by enzymatic pretreatment and used as a strengthening additive in sheet forming. The aim of this paper was to investigate its effects on flocculation, retention and loss rate and the physical and mechanical properties. CNF was subjected to fluorescent labeling with RBITC (Rhodamine B isothiocyanate), and the retention of fluorescent cellulose nanofibrils (FCNF) was analyzed by elemental analysis and fluorescence intensity. The retention and loss rate of the FCNF decreased with increasing the addition of FCNF. Laser Confocal Scanning Microscopy (LCSM) and Scanning Electron Microscope (SEM) images confirmed that FCNF can be evenly distributed in the paper. A thorough investigation of the relation between the retention rate and papersheet performance was conducted.

在这项工作中，我们报告了一种使用荧光纤维素纳米原纤维分析造纸过程中保留率和损失率的新表征方法。通过酶法预处理从化学纸浆中分离出纤维素纳米原纤维（CNF），并将其用作片材成型中的增强添加剂。本文的目的是研究其对絮凝，保留和损失率以及物理和机械性能的影响。CNF用RBITC（若丹明B异硫氰酸盐）进行荧光标记，并通过元素分析和荧光强度分析了荧光纤维素纳米原纤维（FCNF）的保留。随着FCNF的添加，FCNF的保留率和损失率降低。激光共聚焦扫描显微镜（LCSM）和扫描电子显微镜（SEM）图像证实FCNF可以均匀地分布在纸张中。对保留率和纸张性能之间的关系进行了彻底的研究。