碳纳米管对纺织品还原液中可分解芳香胺的吸附研究
2015-04-09唐晓萍张磊朱林平席再娟苗其来崔
唐晓萍+张磊+朱林平+席再娟+苗其来+崔莎莎



摘要:本文研究了碳纳米管对纺织品还原液中可分解芳香胺的吸附作用。样品按GB/T 17592的方法用柠檬酸盐提取后,加入连二亚硫酸钠将提取液中的禁用偶氮染料还原成芳香胺。之后在含有芳香胺的还原液中加入碳纳米管对芳香胺进行吸附,吸附后的溶液经浓缩后用气质联用仪测定其中的可分解芳香胺,计算吸附率。结果表明:碳纳米管能完全吸附纺织品还原液中的24种可分解芳香胺,吸附率接近100%。该结果为进一步研究纺织品中可分解芳香胺的快速、环保的检测方法提供了基础。
关键词:碳纳米管;气质联用仪;富集;芳香胺;禁用偶氮染料
中图分类号:TS101.9 文献标志码:A
Study on the Adsorption Effect of Carbon Nanotubes on Aromatic Amine in Reduction Solution of Textiles
Abstract: This paper studies the adsorption effect of carbon nanotubes on decomposable aromatic amine in the reduction solution of textiles. The samples were extracted with citrate according to GB/T 17592, then the aqueous sodium dithionite solution was added to the extracted liquid so that the banned azo colourants were reduced to aromatic amines. The carbon nanotubes were added to adsorb the aromatic amine. After enrichment, the aromatic amines were tested by GC-MS and the adsorption rate was calculated. The results show that the 24 kinds of aromatic amine in textiles can be adsorbed completely by the carbon nanotubes and the adsorption rate is up to almost 100%.
Key words: carbon nanotubes; GC-MS; enrichment; aromatic amine; banned azo colourants
偶氮染料是目前最重要的一类合成染料,被广泛应用在纺织布料、皮革等产品中。但用某些偶氮染料染色的纺织品与人体皮肤长期接触后,还原出对人体或动物有潜在致癌性的芳香胺。随着人们环保和健康意识的不断加强,偶氮染料已经被广泛关注。目前,国内外纷纷制定法律法规,禁止纺织品中使用某些可分解为致癌芳香胺的偶氮染料。
对禁用偶氮染料的检测,常用的方法标准有EN 14362- 1、EN 14362-2和GB/T 17592,但这 3 种标准方法的前处理步骤较为复杂和耗时,需要使用大量的有机溶剂,不但增加了成本,而且影响试验人员的身体健康,对环境造成污染。
本文研究了碳纳米管对纺织品还原液中24种可分解芳香胺的吸附。结果表明,碳纳米管可以吸附纺织品还原液中的24种可分解芳香胺,吸附率均接近100%。……
