摘要
为提高海藻酸钠纤维的断裂强度,采用环氧氯丙烷先改性海藻酸钠,并用湿法纺丝制备改性海藻酸钠纤维。将制备的改性海藻酸钠纤维经过100℃烘干使之进一步发生交联反应。烘干后的改性海藻酸钠纤维浸泡在质量分数为0.4%的Na Cl溶液中以脱去部分与海藻酸钠交联的钙离子。结果表明,经过烘干和浸泡Na Cl溶液处理的改性海藻酸钠纤维断裂强度最高可达15.9 c N/tex,比未经烘干和浸泡Na Cl溶液处理的改性海藻酸钠纤维断裂强度高59%,比纯海藻酸钠纤维断裂强度高42.9%。FT-IR谱图在1 256 cm-1处增加了环氧氯丙烷的三元环醚特征吸收峰,723 cm-1处增加了环氧氯丙烷的—C—Cl特征吸收峰,表明环氧氯丙烷与海藻酸钠发生交联反应。SEM和XPS分析结果表明,通过浸泡Na Cl溶液,部分钙离子从纤维中脱去,纤维表面逐渐变得光滑均匀。
In order to improve the breaking strength of sodium alginate fibers, sodium alginate was modified with epichlorohydrin. Then the modified sodium alginate fibers were prepared using wet spinning method. The modified sodium alginate fiber were dried at 100 ℃ for crosslinking reaction. After that the dried fibers were soaked in 0.4% NaCl solution for removing the calcium ions. The results showed that the highest breaking strength of the fibers which were dried at 100 ℃ and soaked in 0.4% NaCl solution was 15.9 cN/tex. 59% and 42.9% increase of the breaking strength was obtained in comparison with the modified sodium alginate fibers not subjected to drying and soaking of NaCl solution, respectively. New bands（-C-O-C- and -C-Cl） at 1 256 cm^-1 and 723 cm^-1 in the FT-IR spectrum implied that crosslinking reaction happened. SEM and XPS images demonstrated that after soaking NaCl solution, Ca^2＋ were removed from the fibers and the surface of the fibers became smooth and even.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2015年第5期18-22,共5页
Journal of Textile Research
关键词
海藻酸钠
环氧氯丙烷
改性
断裂强度
sodium alginate
epichlorohydrin
modification
breaking strength
