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采用离子交换法将马来酸单体插入Mg/Al-Cl-LDH层间,然后通过热或氧化还原引发层间单体链式原位缩聚制备聚马来酸/水滑石(LDH)插层型纳米复合材料。研究了插层组装的条件和引发聚合的方法。采用X射线衍射(XRD)、红外光谱(FT-IR)、热重及差热分析(TG-DTA)和扫描电子显微镜(SEM)等手段对样品进行了表征与测试。结果表明,马来酸插层LDH使层间距由0.767 nm增大至1.19 nm,H2O2引发剂或热引发聚合使层间距由1.19 nm分别减小至1.114 nm和1.085 nm,产物粒径为50 nm~100 nm。聚马来酸分子进入LDH层间形成超分子结构,使其热稳定性提高100℃以上。
The maleic acid monomer was inserted between the Mg / Al-Cl-LDH layers by ion exchange method and then the polymaleic acid / hydrotalcite (LDH) intercalation was prepared by in-situ polycondensation of interlayer monomer chains by thermal or redox reaction Type nanocomposite. The conditions for intercalation and the method of initiating polymerization were investigated. The samples were characterized and tested by XRD, FT-IR, TG-DTA and SEM. The results showed that the intercalation of LDH by maleic acid increased the interlayer spacing from 0.767 nm to 1.19 nm, and the H2O2 initiator or thermal initiated polymerization decreased the interlayer spacing from 1.19 nm to 1.114 nm and 1.085 nm, respectively, and the product particle size was 50 nm ~ 100 nm. Polymaleic acid molecules enter the LDH layer to form a supramolecular structure, which increases the thermal stability by more than 100 ° C.