The influence of crystalline structure of cellulose in chitosan-based biocomposites on removal of Ca(II), Mg(II), Fe(III) ion in aqueous solutions
The influence of crystalline structure of cellulose in chitosan-based biocomposites on removal of Ca(II), Mg(II), Fe(III) ion in aqueous solutions
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DOI：
10.1007/s10570-021-03899-3
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发表时间：
2021-05-14
期刊：
影响因子：
5.7
通讯作者：
Borysiak, Slawomir
中科院分区：
文献类型：
--
作者：
Grzabka-Zasadzinska, Aleksandra;Ratajczak, Izabela;Borysiak, Slawomir
本文采用x射线衍射、火焰原子吸收光谱、红外光谱、粒径分析、润湿性角等技术，分析了壳聚糖基体中纤维素填料的超分子结构对钙、镁、铁金属离子吸附过程的影响。研究表明，纤维素的多态形态对其粒径有显著影响。纤维素填料在聚合物基体中的引入是壳聚糖复合材料吸附效率变化的主要原因。结果表明，纳米纤维素的吸附效率最高。这种有趣的关系还没有在文献中报道过。这对于设计具有高吸附能力的复合材料尤为重要。本文从晶体学和复合材料表面亲水性的变化两方面对这一问题进行了讨论。复合材料也进行了机械测试，结果显示，与未填充的聚合物相比，复合材料的抗拉强度有了一些有趣的提高。
In this work, the influence of the supermolecular structure of cellulosic fillers in chitosan matrix on the process of adsorption of calcium, magnesium and iron metal ion was analyzed, while using techniques such as: X-ray diffraction, flame atomic absorption spectrometry, FTIR spectroscopy, particle size analysis, and wettability angle. It has been shown that polymorphic form of cellulose significantly affects its particle size. The introduction of cellulosic filler into polymer matrix was responsible for changes in the sorption efficiency of chitosan composites. It was found that materials with nanocellulose II were characterized with the highest efficiency of adsorption. This interesting relationship has not been reported in the literature, yet. It is important especially in terms of designing composite materials with high adsorption capacity. In the presented paper this issue was discussed, taking into account crystallographic aspects as well as changes in the hydrophilicity of the surface of composite materials. Composite materials were also subjected to mechanical tests which showed some interesting increase in tensile strength when compared to the unfilled polymer.