Chitosan is one of the most abundant natural polymers, This biopolymer has useful functional groups such as hydroxyl and amine, so it can interact with metal ions.
壳聚糖是一种天然高分子，分子中含有大量的氨基和羟基，对金属离子有很好的吸附能力。
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The clay modified by amine hydrochlorate of small multi-hydroxyl molecule was synthesized and compounded with starch.