The effect of different binders on the comprehensive performance of solid phase microextraction fiber.
The effect of different binders on the comprehensive performance of solid phase microextraction fiber.
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DOI：
10.1016/j.aca.2020.09.048
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发表时间：
2020-12
影响因子：
6.2
通讯作者：
Yueru Shi;Luyi Chen;Junlong Huang;Zhiwei Ma;Qingkun Hu;Fang Zhu;Juan Zheng;Gangfeng Ouyang
中科院分区：
文献类型：
--
作者：
Yueru Shi;Luyi Chen;Junlong Huang;Zhiwei Ma;Qingkun Hu;Fang Zhu;Juan Zheng;Gangfeng Ouyang
粘结剂是制备固相微萃取（SPME）纤维的重要组分。然而，很少有人注意到不同的粘合剂的效果。考虑到它们的不同性能，本文选取了聚二甲基硅氧烷（PDMS）、聚丙烯腈（PAN）和Nafion三种常用的粘结剂，并引入了一种新型粘结剂聚偏氟乙烯（PVDF），综合研究了粘结剂对复合材料性能的影响。通过使用具有不同粘合剂的商业活性炭（AC），制备了具有均匀形态和比较厚度（即，成功地制备了ACs-PDMS涂层、ACs-PAN涂层、ACs-Nafion涂层和ACs-PVDF涂层纤维。研究了粘结剂对活性炭孔结构的影响。结果表明，PDMS和PAN的加入会造成孔隙堵塞，涂层的比表面积分别从1362 m2 g − 1下降到280和196 m2 g −1。而ACs-PVDF复合材料的比表面积保持为940 m2 g-1。在SPME的基础上，进一步系统地考察了酸碱、高温和基体对不同纤维的影响。最后，初步探讨了所制备纤维对各种有机污染物的富集性能。比较结果表明，PVDF在各方面都表现出突出的稳定性。因此，PVDF可能是制备SPME纤维的一个很好的选择。这些结果对进一步开发新型SPME纤维具有一定的参考价值。
Binders are significant components for the preparation of solid-phase microextraction (SPME) fibers. However, little attention has been paid to the effect of different binders. Considering their diverse properties, in this work, we select three kinds of commonly used binders including polydimethylsiloxane (PDMS), polyacrylonitrile (PAN) and Nafion, as well as introduce a new binder of poly (vinylidene fluoride) (PVDF) to synthetically study the influence of binders. By using the commercial active carbons (ACs) with different binders, four SPME fibers with uniform morphologies and comparative thicknesses (i.e., ACs-PDMS-coated, ACs-PAN-coated, ACs-Nafion-coated and ACs-PVDF-coated fibers) have been prepared successfully. The effect of binders on the pore structure of ACs is firstly investigated. It is found that PDMS and PAN would cause pore blocking, and the specific surface area of ACs coatings decreases from 1362 m2g−1to 280 and 196 m2g−1, respectively. While the specific surface area of ACs-PVDF composite remains 940 m2g−1. Based on SPME, the influences of acid/alkali, high temperature and matrix towards different fibers are further systematically surveyed. Finally, the enrichment performance of prepared fibers towards various organic pollutants is preliminarily discussed. The comparison results show that PVDF demonstrates outstanding stability in all aspects. Therefore, PVDF might be an excellent candidate for the preparation of SPME fiber. Moreover, all obtained results are expected to provide the reference value for the further development of novel SPME fibers.