中分子毒素在碳纳米管上的吸附

研究了两种不同形态的碳纳米管(随机生长多壁碳纳米管(MWCNTs)及定向生长多壁碳纳米管(ACNTs))对典型中分子毒素的吸附性能. 并与两种现有商用血液灌流吸附材料(活性炭(AC)及大孔吸附树脂(MR))进行了对比. 结果显示, 碳纳米管(CNTs)具有优异的中分子吸附能力, 其中MWCNTs对典型中分子毒素的吸附量可达47.18 mg·g-1, 为活性炭的10.8倍, 为大孔吸附树脂的5.5倍. 此外, 碳纳米管的吸附非常迅速, 中分子毒素在MWCNTs及ACNTs达到吸附平衡的时间仅为10 min和15 min, 而活性炭及大孔吸附树脂则分别需要60 min及120 min. 碳纳米管优异的吸附性能得益于其独特的微观结构所形成的发达的中孔. 因此, 碳纳米管可望成为高效的吸附材料, 应用于血液灌流中.

Adsorption of Middle Molecular Weight Toxins on Carbon Nanotubes

The adsorption properties of middle molecular weight toxins on two types of carbon nanotubes (CNTs) (i.e., multi-walled carbon nanotubes (MWCNTs) and aligned multi-walled carbon nanotubes (ACNTs)) were studied and compared with two commercial haemoadsorbents (i.e., activated carbon (AC) and macroporous resin (MR)). The results showed that it took only 10 and 15 min for MWCNTs and ACNTs to achieve the adsorption equilibrium, respectively. The adsorption amount of MWCNTs reached 47.18 mg·g -1, which was 5.5 and 10.8 times of that of macroporous resin and activated carbon, respectively. Pore structure analyses indicated that the high adsorption efficiency should be attributed to the higher mesopore volumes of CNTs. All of the results implied the great potential applications of CNTs in haemoperfusion (HP).