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剥离型纳米蒙脱土/聚酰亚胺复合材料的制备与表征

, PP. 597-603

Keywords: 剥离,纳米蒙脱土,聚酰亚胺,复合材料,预聚体插层

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Abstract:

利用二苯基甲烷-4,4’-二异氰酸酯(MDI)与酸化的蒙脱土(MMT)表面的羟基进行反应制得了MMT-MDI;进一步利用己内酰胺(CPL)对MMT-MDI进行插层并对多余的异氰酸酯端基进行封端,制得了MMT-MDI-CPL。采用预聚体溶液插层法,利用聚酰胺酸(PAA)在二甲基乙酰胺(DMAC)溶剂中分别对MMT-MDI和MMT-MDI-CPL进行预聚体插层,制得了剥离型纳米MMT/聚酰亚胺(PI)复合材料。通过电感耦合等离子体发射光谱(ICP-OES)、FTIR、TG、XRD和SEM对改性MMT和纳米MMT/PI复合材料进行了表征。结果表明:MDI与MMT表面羟基反应而被成功接枝于MMT上;MDI对MMT的改性、CPL对MMT-MDI的插层和封端使MMT层间距得到逐步扩大;MMT/PI复合材料的XRD和断面SEM表明,MMT在PI基体中得到了充分剥离。

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