期刊
CELLULOSE
卷 29, 期 3, 页码 2047-2061出版社
SPRINGER
DOI: 10.1007/s10570-021-04406-4
关键词
Cellulose; Cationic cellulose nanofibers; Adsorption; Salt-free dyeing; Ultra-lightweight paper
资金
- National Key Technology RD Program [2017YFB0307900]
Cationic cellulose nanofibers (CCNFs) with different degrees of substitution were successfully prepared and applied in salt-free dyeing of cellulose paper. The results showed that CCNFs had high adsorption capacity and uptake rate for anionic dyes, and exhibited good color fixation and dye adsorption during the dyeing process.
Cationic modification of cellulose fibers is an effective strategy to improve the absorptive capacity of anionic dyes and promote wastewater treatment. In this study, cationic cellulose nanofibers (CCNFs) with different degrees of substitution (DS) were prepared by grafting cellulose fibers with 2, 3-epoxypropyltrimethylammonium chloride (EPTMAC) and homogenizing. The synthesized CCNFs were employed in salt-free dyeing of ultra-lightweight paper. It showed that the maximum adsorption capacity of CCNFs for anionic dye was 1281.74 mg/g, and the dye uptake was as high as 90% under mild conditions without NaCl. Dyeing adsorption dynamics and isotherm analyses revealed that the dyeing process was monomolecular chemical adsorption. Moreover, compared with the control group and blank group, the dyed ultra-lightweight paper added with CCNFs not only had better color fixation and dye uptake, but also possessed higher breaking stress. This study fully confirmed the great potential of CCNFs in the salt-free dyeing of cellulose.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据