Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, No. 29, 13th Street, TEDA, Tianjin, 300457, China.
Yunnan Reconstituted Tobacco Co., Ltd., No. 41, Keyi Road, Kunming High and New Tech Industrial Development Zone, Kunming, Yunnan, 650106, China.
Carbohydr Polym. 2019 Apr 15;210:372-378. doi: 10.1016/j.carbpol.2019.01.065. Epub 2019 Jan 26.
The study that cationic cellulose nanofibers (CCNF) acts as sustainable flocculant and retention aid of precipitated calcium carbonate (PCC) for the preparation of reconstituted tobacco sheet (RTS) was carried out, thanks to the properties of CCNF. In this work, the enhanced flocculation, reflocculation and size properties of PCC flocs induced by CCNF were investigated via a focused beam reflectance measurement (FBRM) system. The physical properties of RTS such as bulk and air permeability etc. were also studied. The results indicated that CCNF could distinctly improve the flocculation and reflocculation properties of PCC with a desirable chord length in the tobacco slurry, and that the PCC retention was also increased with CCNF addition along with a slight decrease of tensile strength of RTS. The mechanisms of flocculation and reflocculation, as well as the reasons of enhanced bulk and air permeability properties ascribed to CCNF were also demonstrated.
该研究表明，阳离子纤维素纳米纤维（CCNF）可作为沉淀碳酸钙（PCC）的可持续絮凝剂和保留助剂，用于制备再造烟叶（RTS），这要归功于 CCNF 的特性。在这项工作中，通过聚焦光束反射测量（FBRM）系统研究了 CCNF 对 PCC 絮体增强絮凝、再絮凝和粒径特性的影响。还研究了 RTS 的物理性能，如体积和空气渗透性等。结果表明，CCNF 可以明显改善烟草浆中 PCC 的絮凝和再絮凝性能，并具有理想的弦长，随着 CCNF 的添加，PCC 的保留率也增加，而 RTS 的拉伸强度略有下降。还证明了絮凝和再絮凝的机理，以及 CCNF 增强体积和空气渗透性的原因。
