摘要
大气吸附管填料的使用直接影响气体分析结果的准确性。为了探讨纳米纤维作为一种新型吸附管填料对大气中可挥发性有机物富集的优劣势，本研究制作了一种以纳米纤维为填料的挥发性有机物富集小柱，对纳米纤维的种类进行了选择，并对最佳填装质量、采样流速，以及可采集的污染物浓度范围进行了实验探讨，最后进行了实际样品的富集实验。研究表明，利用带羧基的聚苯乙烯纳米纤维进行挥发性有机物富集效果较好，可富集的有机物浓度范围为0～2mg／m3（每种物质）。其最合理的工作条件为：填装20mg纳米纤维制作成富集小柱，在流量为0．1mL／min时可满足富集要求。纳米纤维在富集实际大气中的初步实验，证明其在该领域的潜在应用价值。
The usage of filler in air adsorbent tube directly influences the accuracy of gas analysis results. In order to investigate the effect of nanofibers, a new filler of sorbent tubeon enriching VOCs （Volatile Organic Compounds） in air, the column filled with nanofiber filler was made to enrich VOCs. In the experiment, nanofiber species, the best filling quality, sampling flow rate and the collected contaminants concentration range was studied. The actual sample enrichment experiment was also processed at the superior condition. In result, carboxyl polystyrene nanofibers showed better enrichment effect for VOCs including benzene, tol- uene, xylene, styrene, ethylbenzene, butyl acetate and undecan~ Its efficient enrichment range was from 0 to 2mN/m3 （for each studied substance）. The most reasonable working conditions were as follows., filling 20 m4g nanofibers tomake a set of enrichment eolumella. Sampling flow rate of 0. lmL/min can meet the requirements of enrichment. The preliminary experiment of nanofiber enriching actual air VOCs proved the potential application value of the technique in the near future
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第1期151-154,共4页
New Chemical Materials
基金
国家自然科学基金(41175104
40745027)
