摘要
利用静电纺丝法制备一系列纤维形貌良好、平均直径为410nm的AAI/PAN前驱体纳米纤维,经不同温度预氧化后得到纤维平均直径约为240nm的预氧丝。通过FTIR、TG-DTA和XRD等表征手段分别计算了各预氧丝的预氧化程度。结果显示,随预氧化温度的升高,PAN分子的预氧化程度不断增强,各表征手段最后所得预氧化度分别为80.4%、84.4%和61.3%。另外,AAI的加入不仅增强了复合纳米纤维的磁性能,而且还在一定程度上降低了预氧化反应的起始和终止温度,节约了能源,减缓了放热反应的速率。在综合各项测试的基础上确定了AAI/PAN纳米纤维的最佳预氧化温度为240℃。
A series of AAI/PAN nanofibers with average diameter of 410 nm are prepared via elctrospinning successfully .The obtained precursor nanofibers are stabilized in different temperatures in air and then are characterized by FTIR ,TG-DTA and XRD to get the stabilization index of as-stabilized fibers after different temperature treatments . The results show the stabilization indexes of PAN molecule are increased with increasing the stabilization temperature , the final stabilization index corresponding to above three characterizations are 80 .4% ,84 .4% and 61 .3% ,respectively .In addition ,the inclusion of AAI in the PAN nanofibers can not only improve the magnetic properties of composite nanofibers ,but also lower the initial and terminal reaction temperature to some extent ,and slow down the rate of stabilization reaction at the same time . On the base of the results of different tests ,240 ℃ is identified as the best stabilization temperature for AAI/PAN nanofibers .
出处
《实验技术与管理》
CAS
北大核心
2014年第6期54-57,62,共5页
Experimental Technology and Management
基金
中国博士后科学基金项目(2013M540418)
江苏省高校自然科学基金项目(11KJB430006)
江苏省博士后科研资助计划项目(1301055B)
江苏省"青蓝工程"项目资助
