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首页> 外文期刊>Starch: International Journal for the Investigation, Processing and Use of Carbohydrates and their Derivatives: Internationale Zeitschrift fur die Erforschung, Verarbeitung und Verwendung von Kohlenhydraten und deren Derivaten >Characterization of hydrogel synthesized from natural polysaccharides blend grafted acrylamide using microwave (MW) and ultraviolet (UV) techniques
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Characterization of hydrogel synthesized from natural polysaccharides blend grafted acrylamide using microwave (MW) and ultraviolet (UV) techniques

机译：利用微波（MW）和紫外线（UV）技术表征天然多糖共混接枝丙烯酰胺合成的水凝胶

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摘要

Grafting is a powerful method for producing substantial modification in the polysaccharide polymer properties thereby enlarging the range of its utilization. The aim of this work is to identify the appropriate conditions for grafting a candidate synthetic monomer (acrylamide) onto a blend of polysaccharides (PsB) comprising of starch, chitosan, and alginate. Grafting process was carried out in the presence of a low concentration of potassium persulfate initiator and methylenebisacrylamide crosslinkerusing microwave (MW) or ultraviolet (UV) irradiation techniques. Different Am/PsB weight ratios (0.6-0.96) has been performed. The produced hydrogel was characterized using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope(SEM) as well as nitrogen percent (%N). This study is focusing on comparing hydrogel samples in terms of grafting percentage (%G), grafting efficiency (%GE) and %add-on. UV graft PsB (PsB-g-Am) gave the highest %G (157.8%), %GE (84%), %add-on (61.95%) and %N (8.79%). Swelling water ratio (SWR) for the grafted samples in distilled water (DW) and different pH solutions (3-13) has been studied. UV grafted hydrogel gave a maximum SWR of 39 g/g. Am/PsB weight ratio and irradiation source had a direct effecton SWR of the produced hydrogel.
机译：接枝是在多糖聚合物性质上产生实质性改变从而扩大其利用范围的有效方法。这项工作的目的是确定合适的条件，将候选合成单体（丙烯酰胺）接枝到包含淀粉，壳聚糖和藻酸盐的多糖（PsB）的混合物上。在低浓度过硫酸钾引发剂和亚甲基双丙烯酰胺交联剂的存在下，使用微波（MW）或紫外线（UV）辐照技术进行了接枝过程。已经执行了不同的Am / PsB重量比（0.6-0.96）。使用傅立叶变换红外（FTIR）光谱和扫描电子显微镜（SEM）以及氮百分比（％N）对生成的水凝胶进行表征。这项研究的重点是比较水凝胶样品的接枝率（％G），接枝效率（％GE）和附加％。紫外线接枝的PsB（PsB-g-Am）给出了最高的％G（157.8％），％GE（84％），％加成（61.95％）和％N（8.79％）。研究了接枝样品在蒸馏水（DW）和不同pH溶液（3-13）中的溶胀水比（SWR）。 UV接枝的水凝胶的最大SWR为39 g / g。 Am / PsB的重量比和辐射源直接影响所生产水凝胶的SWR。

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