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Dual stimuli responsive glycidyl methacrylate chitosan-quaternary ammonium hybrid hydrogel and its bovine serum albumin release

机译:双重刺激响应的甲基丙烯酸缩水甘油酯壳聚糖-季铵盐混合水凝胶及其牛血清白蛋白的释放

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A new family of cationic hybrid hydrogels from two new positively charged aqueous soluble precursors, glycidyl methacrylate-chitosan (GMA-chitosan), and 2-(acryloyloxy) ethyl trimethylammonium (AETA), was developed via a simple photocrosslinking fabrication method. These hybrid hydrogels have pendant quaternary ammonium functional groups on the AETA segments. The chemical composition of GMA-chitosan/AETA hybrid hydrogels were characterized by Fourier transform infrared spectroscopy and their mechanical, swelling, and morphological properties were examined as a function of the composition of the hybrids as well as the effect of pH and ionic strength of the surrounding medium. GMA-chitosan/AETA hybrid hydrogels show a porous network structure with average pore diameter 20-50 μm. The compression moduli of these hybrid hydrogels ranged from 27.24 to 28.94 kPa, which are significantly higher than a pure GMA-chitosan (17.64 kPa). GMA-chitosan/AETA hybrid hydrogel shows pH/ionic strength responsive swelling behavior because of the presence of the positive charge pendant groups. These hybrid hydrogels showed a sustained BSA protein release and a significantly lower initial burst release than a pure GMA-chitosan hydrogel. The two aqueous soluble precursors and the cationic charge characteristics of the resulting GMA-chitosan/AETA hybrid hydrogels may suggest that this new family of biomaterials may have promising applications as the pH responsive protein drug delivery vehicles.
机译:通过一种简单的光交联制备方法,从两个新的带正电的水溶性前体,甲基丙烯酸缩水甘油酯-壳聚糖​​(GMA-壳聚糖)和2-(丙烯酰氧基)乙基三甲基铵(AETA)开发了一个新的阳离子杂化水凝胶系列。这些杂化水凝胶在AETA片段上具有侧链季铵官能团。 GMA-壳聚糖/ AETA杂化水凝胶的化学组成通过傅立叶变换红外光谱进行了表征,并检查了它们的机械,溶胀和形态学特性,作为杂化物组成的函数以及pH和离子强度的影响。周围的介质。 GMA-壳聚糖/ AETA杂化水凝胶显示出平均孔径为20-50μm的多孔网络结构。这些杂化水凝胶的压缩模量为27.24至28.94 kPa,远高于纯GMA-壳聚糖(17.64 kPa)。由于存在正电荷侧基,GMA-壳聚糖/ AETA杂化水凝胶显示出pH /离子强度响应溶胀行为。与纯GMA-壳聚糖水凝胶相比,这些杂化水凝胶显示出持续的BSA蛋白释放和明显更低的初始爆发释放。两种水溶性前体和所得GMA-壳聚糖/ AETA杂化水凝胶的阳离子电荷特性可能表明,这一新的生物材料家族作为pH响应蛋白药物传递载体具有广阔的应用前景。

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