期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 4, 期 5, 页码 2838-2842出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.6b00351
关键词
High boiling solvent (HBS) lignin; Polyacrylonitrile; Hollow fiber; Wet-spinning Coagulation
资金
- National Natural Science Foundation of China [51303199]
Lignin is the second most abundant and inexpensive natural biopolymers on earth. In this work, lignin/polyacrylonitrile composite fibers were prepared by wet-spinning method. A transition from solid fiber to hollow fiber was observed when the volume fraction of water in a mixed dimethyl sulfoxide/water coagulation bath was increased. The theological measurements results showed that the spinning solution had no chemical reactions and was stable at the spinning conditions. Lots of interconnected macro- and medium pores (50-90 nm) were formed inside the wall section of these hollow fibers. The change of coagulation solvent had little influence on the outer diameters of the fibers. The formations of the hollow structure and the pores are ascribed to a diffusion controlled procedure. The reaction between formaldehyde and hydroxyl groups (-OH) in lignin molecule was found to improve slightly fiber modulus and thermal stability. This study provides a facial way to prepare lignin-based hollow fibers for many applications.
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