Here, a new kind of Salecan derived polysaccharide metallohydrogel was reported. Successful fabrication of Salecan metallohydrogel was verified by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and rheological measurements. Scanning electron microscope investigations have been conducted to elucidate the morphology of Salecan/Cr³⁺ gel (SCgel). We found that the pore size of metallohydrogel can be tailored by adjusting the Cr³⁺ dose during gel formation. After that, swelling and de-swelling behaviors were systematically studied. The increasing of chromium ion concentration and the presence of saline solutions will cause the decrease of swelling percentage. It is assumed that the decreasing hydrophilicity of Salecan, the increase of crosslinking density, and the complexation of the carboxylate group with saline ions are the main syneresis mechanisms. Altogether, this study opens a new avenue to prapare Salecan-based hydrogel.

中文翻译：

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得自Salecan的多糖金属水凝胶和三价铬：合成与表征

在此，报道了一种新型的Salecan衍生的多糖金属水凝胶。Salecan金属水凝胶的成功制备已通过傅里叶变换红外光谱，X射线衍射，热重分析和流变学测量得到验证。已经进行了扫描电子显微镜研究以阐明Salecan / Cr ³⁺凝胶（SC凝胶）的形态。我们发现可以通过调节Cr ³⁺来调整金属水凝胶的孔径凝胶形成过程中的剂量。之后，系统地研究了溶胀和消肿行为。铬离子浓度的增加和盐溶液的存在将导致溶胀百分比降低。可以认为，Salecan的亲水性下降，交联密度的增加以及羧酸根与盐离子的络合是主要的协同作用机理。总之，这项研究为基于萨勒肯的水凝胶开辟了一条新途径。