醚化改性木浆纤维增强辊压法烟草薄片的研究

Enhancement of Rolled Reconstituted Tobacco Sheets by Adding Carboxymethylated Wood Fibers

关键词:  辊压法  烟草薄片  羧甲基化改性木浆纤维  抗张强度

Key Words:rolling process  reconstituted tobacco sheet  carboxymethylated cellulose fibers  tensile strength

摘要:辊压法工艺是制备新型烟草薄片的重要方法之一。添加木浆纤维是增强辊压法制备烟草薄片的主要方式，但因其分散性差而减弱了增强效果。本研究将醚化改性的木浆纤维添加到烟草薄片中，以提升烟草薄片的强度，同时比较了未处理纤维、打浆处理纤维和醚化改性纤维的增强效果。结果表明，相比未处理的木浆纤维和打浆处理的木浆纤维，醚化改性木浆纤维可以均匀地分散在烟草薄片中，且呈现出更好的增强效果。当纤维添加量为2.5%时，添加醚化改性木浆纤维烟草薄片的抗张强度可以达到1920 N/m，是未添加木浆纤维烟草薄片的5.4倍（355 N/m）、添加等量未打浆处理木浆纤维烟草薄片的3倍（655 N/m）以及添加等量打浆处理木浆纤维烟草薄片的2.3倍（852 N/m）。

Abstract:Rolling process is one of the most important manufacturing methods for reconstituted tobacco sheet using in new tobacco products. The addition of cellulose fibers is a major method to reinforce the strength of rolled reconstituted tobacco sheet. However, their reinforcing effect will be limited due to the poor dispersibility of cellulose fibers inside the sheets. In this study, carboxymethylated cellulose fibers were used as a reinforcing agent to significantly improve the tensile strength of rolled reconstituted tobacco sheet. The comparation in reinforcing effect of various cellulose fibers (carboxymethylated fibers, beaten fibers and original fibers) was carried out, and the results showed that the reconstituted tobacco sheets adding carboxymethylated cellulose fibers exhibited a maximum tensile strength due to the well-dispersed carboxymethylated fibers and increased number of hydrogen bonding in the sheet. When adding dosage was 2.5%, the strength of the reconstituted tobacco sheet reached 1920 N/m, which was 5.4, 3 and 2.8 times higher than that of reconstituted tobacco sheets without cellulose fibers (355 N/m), with original fibers (655 N/m) or beaten fibers (852 N/m), respectively. This work brought a new idea to the preparation of rolled reconstituted tobacco with excellent tensile strength.