Citation: LU Yue-Mei, GONG Qian-Ming, LIANG Ji, NIE Qing-Dong. Modification Carbon Nanotubes Composite Beads by L-Tryptophan and Their Adsorption Capacity for Low Density Lipoprotein[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(10): 2034-2042. doi: 10.3969/j.issn.1001-4861.2013.00.280 shu

Modification Carbon Nanotubes Composite Beads by L-Tryptophan and Their Adsorption Capacity for Low Density Lipoprotein

1.
1 School of Mechanical Engineering & Automation of Fuzhou University, Fuzhou 350108, China;

Received Date: 20 March 2013
Available Online: 2 May 2013
Fund Project: 国家自然科学基金(No.50602026)资助项目 (No.50602026)

The porous carbon nanotubes (CNTs)/activated carbon composite beads were modified by L-tryptophan using epichlorohydrin coupling method. The composite beads were characterized by SEM, N₂ adsorption, FTIR, TGAand XPSetc. Then these composite beads were applied to adsorb low density lipoprotein (LDL) by static adsorption experiment in vitro. The results show that the composite beads could be modified by L-tryptophan using epichlorohydrin coupling method. With the increase CNTs mass ratio, the adsorption capacity of LDLincrease. When CNTs ratio is 45wt%, the adsorption amount of LDLreaches 4.623 mg·g^-1, is 2.3 times as great as that of beads without CNTs. These should be ascribed to the highly developed 20～100 nm porous structures and the increase of L-tryptophan amount on the composite beads mainly brought about by CNTs, enhancing the LDLadsorption ability onto the composite beads greatly. So the composite beads have good prospects as LDLadsorbent in hemoperfusion.
- carbon nanotubes; composite beads; L-tryptophan; low density lipoprotein; adsorption
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