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pH- and Thermo-Induced Specific Permeability of Chiral Amino Acids through the Peptide Grafted Poly(N-isopropylamide) Network Membrane

机译:通过肽接枝的聚(N-异丙基酰胺)网络膜的pH和热诱导手性氨基酸的比渗透率

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摘要

In this article we prepared an amphiphilic peptide, (L-Leu-L-Lys)_8, grafted poly(N-isopropylacrylamide) network membrane. The graft content of the peptide and the content of the cross-linker were 4% and 16%, respectively. We investigated the permeability of L- and D- phenylalanine through this membrane. The pH- and thermo-induced permeability changes of the network membrane were observed. Under the neutral condition (pH 6.5 and 20 ℃), the peptide grafted PNIPAm network membrane showed a significant difference between the permeability of l-phenylalanine and d-phenylalanine. The maximum permselectivity (α=6) was achieved under this condition. At temperatures above the LCST of PNIPAm, PNIPAm polymers become hydrophobic ; hence, the membrane shrunk. And under these conditions the permeable path for L- and D- phenylalanine was formed in the membrane which results in the non-permselectivity through this membrane.
机译:在本文中,我们制备了两亲性肽(L-Leu-L-Lys)_8,接枝了聚(N-异丙基丙烯酰胺)网络膜。肽的接枝含量和交联剂含量分别为4%和16%。我们研究了L-和D-苯丙氨酸通过该膜的渗透性。观察到pH和热诱导的网络膜渗透性变化。在中性条件下(pH 6.5和20℃),肽接枝的PNIPAm网络膜在L-苯丙氨酸和d-苯丙氨酸的渗透性之间存在显着差异。在此条件下获得了最大的选择性(α= 6)。在高于PNIPAm的LCST的温度下,PNIPAm聚合物变为疏水性;因此,膜收缩。并且在这些条件下,在膜中形成了L-和D-苯丙氨酸的渗透路径,这导致通过该膜的非渗透选择性。

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  • 来源
    《繊維学会誌》 |2013年第12期|245-250|共6页
  • 作者单位

    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Shouwa-ku, Nagoya 466-8555, Japan;

    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Shouwa-ku, Nagoya 466-8555, Japan;

    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Shouwa-ku, Nagoya 466-8555, Japan;

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