摘要
以静电纺聚丙烯腈(PAN)纳米纤维为原料,与盐酸羟胺的水溶液反应,将腈基转化为偕胺肟基团,从而制备出偕胺肟基螯合纤维。探讨了盐酸羟胺浓度、pH值、反应时间及温度对转化率的影响,并分别采用扫描电子显微镜和傅里叶变换红外光谱(FT-IR)对PAN纳米纤维膜反应前后的形貌和分子基团进行分析。结果表明:PAN在pH值为7时,腈基转化率最高;-CN转化率随着浓度、反应时间及温度的增大而提高。红外光谱分析表明,PAN分子中有部分腈基转化为偕胺肟基团。
Electrospun PAN nanofiber was modified into a chelating fiber containing amidoxime group by reacting with hydroxylamine hydrochloride, resulting from that nitrile was transformed into amidoxime group. The effect of NH2OH ·HC1 concentration, pH, reaction time and temperature on conversion rate was discussed. The morphology and molecular groups of PAN nanofiber before and aher reaction were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy, respectively. Experimental results showed that the highest conversion ratio could be achieved when the pH value of hydroxylamine solution was 7. The conversion rate was improved with the increase of NH2OH · HC1 concentration, reaction time and temperature. Infrared spectral analysis showed some nitriles were transformed into amidoxime groups.
出处
《化工新型材料》
CAS
CSCD
北大核心
2012年第2期53-55,共3页
New Chemical Materials
基金
教育部博士点专项基金(20090093110004)
新世纪优秀人才计划(NCET-06-0485)
