Emin Çorman M, Bereli Nilay, Özkara Serpil, Uzun Lokman, Denizli Adil
Hacettepe University, Chemistry Department, Ankara, Turkey.
Biomed Chromatogr. 2013 Nov;27(11):1524-31. doi: 10.1002/bmc.2954. Epub 2013 Jun 18.
As alternative hydrophobic adsorbent for DNA adsorption, supermacroporous cryogel disks were synthesized via free radical polymerization. In this study, we have prepared two kinds of cryogel disks: (i) poly(2-hydroxyethyl methacrylate-N-methacryloyl-l-tryptophan) [p(HEMA-MATrp)] cryogel containing specific hydrophobic ligand MATrp; and (ii) monosize p(HEMA-MATrp) particles synthesized via suspension polymerization embedded into p(HEMA) cryogel structure to obtain p(HEMA-MATrp)/p(HEMA) composite cryogel disks. These cryogel disks containing hydrophobic functional group were characterized via swelling studies, Fourier transform infrared spectroscopy, elemental analysis, surface area measurements and scanning electron microscopy. DNA adsorption onto both p(HEMA-MATrp) cryogel and p(HEMA-MATrp)/p(HEMA) composite cryogels was investigated. Maximum adsorption of DNA on p(HEMA-MATrp) cryogel was found to be 15 mg/g polymer. Otherwise, p(HEMA-MATrp)/p(HEMA) composite cryogels significantly increased the DNA adsorption capacity to 38 mg/g polymer. Composite cryogels could be used repeatedly without significant loss on adsorption capacity after 10 repetitive adsorption-desorption cycles.
作为用于DNA吸附的替代疏水吸附剂，通过自由基聚合合成了超大孔冷冻凝胶盘。在本研究中，我们制备了两种冷冻凝胶盘：（i）含有特定疏水配体MATrp的聚（甲基丙烯酸2-羟乙酯-N-甲基丙烯酰基-L-色氨酸）[p（HEMA-MATrp）]冷冻凝胶；（ii）通过悬浮聚合合成的单尺寸p（HEMA-MATrp）颗粒嵌入p（HEMA）冷冻凝胶结构中，以获得p（HEMA-MATrp）/p（HEMA）复合冷冻凝胶盘。通过溶胀研究、傅里叶变换红外光谱、元素分析、表面积测量和扫描电子显微镜对这些含有疏水官能团的冷冻凝胶盘进行了表征。研究了DNA在p（HEMA-MATrp）冷冻凝胶和p（HEMA-MATrp）/p（HEMA）复合冷冻凝胶上的吸附情况。发现DNA在p（HEMA-MATrp）冷冻凝胶上的最大吸附量为15mg/g聚合物。否则，p（HEMA-MATrp）/p（HEMA）复合冷冻凝胶显著提高了DNA吸附容量至38mg/g聚合物。复合冷冻凝胶可以重复使用，在10次重复吸附-解吸循环后吸附容量没有明显损失。
