Characterization of hydrophobic hypercrosslinked polymer as an adsorbent for removal of chlorinated volatile organic compounds.
Characterization of hydrophobic hypercrosslinked polymer as an adsorbent for removal of chlorinated volatile organic compounds.
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DOI：
10.1021/es104250j
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发表时间：
2011-04
影响因子：
11.4
通讯作者：
Chao Long;Peng Liu;Ying Li;Aimin Li;Quan-xing Zhang
中科院分区：
文献类型：
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作者：
Chao Long;Peng Liu;Ying Li;Aimin Li;Quan-xing Zhang
制备了一种以聚（4-叔丁基苯乙烯-苯乙烯-二乙烯基苯）为基体的疏水性超高交联聚合物（LC-1），用于脱除气体中的挥发性有机物。LC-1的含氧官能团含量约为商品超高交联吸附剂（NDA-201）的四分之一。水蒸气吸附实验结果表明，LC-1具有比NDA-201更疏水的表面。以三氯乙烯、三氯甲烷和1，2-二氯乙烷3种氯代挥发性有机物为对象，研究了LC-1在干、湿条件下的吸附特性。平衡吸附实验表明，LC-1具有丰富的双螺旋结构，对3种氯代VOCs具有较好的吸附性能。此外，当相对湿度等于或低于50%时，气流中水蒸气的存在对LC-1吸附三种氯代挥发性有机物的穿透时间的影响可以忽略不计;即使相对湿度为90%时，三种氯代挥发性有机物的穿透时间也下降不到11%。综上所述，预计LC-1将是一种有前途的吸附剂，用于从潮湿气流中去除VOC蒸气。
A hydrophobic hypercrosslinked polymer with poly (4-tert-butylstyrene-styrene-divinylbenzene) matrix (LC-1) was prepared as adsorbent for the removal of volatile organic compounds from gas streams. The content of oxygen-containing functional groups of LC-1 was about one-fourth that of commercial hypercrosslinked polymeric adsorbent (NDA-201). The results of the water vapor adsorption experiment indicated that LC-1 had a more hydrophobic surface than NDA-201. Three chlorinated volatile organic compounds (trichloroethylene, trichloromethane, and 1, 2-dichloroethane) were used to investigate the adsorption characteristics of LC-1 under dry and humid conditions. Equilibrium adsorption data in dry streams showed that LC-1 had good adsorption abilities for three chlorinated VOCs due to its abundant micropore structure. Moreover, the presence of water vapor in the gas stream had negligible effect on breakthrough time of three chlorinated VOCs adsorption onto LC-1 when values of relative humidity were equal to or below 50%; the breakthrough time of three chlorinated VOCs decreased less than 11% even if the relative humidity was 90%. Taken together, it is expected that LC-1 would be a promising adsorbent for the removal of VOCs vapor from the humid gas streams.