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通过自由基水溶液聚合制备了聚二烯丙基二甲基氯化铵-丙烯酰胺-丙烯酸(PDM-AM-AA),将PDM-AM-AA分别与钠基蒙脱土、十六烷基三甲基氯化铵改性蒙脱土(1631-MMT)和二烯丙基二甲基氯化铵改性蒙脱土(DM-MMT)进行复合,制备系列纳米复合材料,采用FT-IR和XRD对其结构进行了表征,并将其分别配合2%铬粉应用于皮革鞣制工艺中,对坯革的耐湿热稳定性和物理机械性能进行了测试。XRD结果表明:PDM-AM-AA/1631-MMT和PDM-AM-AA/DM-MMT纳米复合材料中蒙脱土的衍射峰消失,PDM-AM-AA/Na-MMT纳米复合材料中蒙脱土的层间距为1.5125nm;与聚合物PDM-AM-AA相比,蒙脱土的引入使得纳米复合材料的结晶度不同程度地降低。应用结果表明:PDM-AM-AA/DM-MMT配合2%铬粉应用于制革工艺中,坯革的各项性能较好,能够符合服装用皮革QB/T1872-2004的标准。
The polydiallyldimethylammonium chloride-acrylamide-acrylic acid (PDM-AM-AA) was prepared by free radical polymerization. The PDM-AM-AA was reacted with sodium montmorillonite, Methyl ammonium chloride modified montmorillonite (1631-MMT) and diallyldimethylammonium chloride modified montmorillonite (DM-MMT) were compounded to prepare a series of nanocomposites. FT-IR and The structure of XRD was characterized by XRD and the results were compared with 2% chromium powder for leather tanning process. The wet and heat stability and physical and mechanical properties of the leather were tested. XRD results showed that the diffraction peaks of montmorillonite in PDM-AM-AA / 1631-MMT and PDM-AM-AA / DM-MMT nanocomposite disappeared, The interlayer spacing of soil is 1.5125nm. Compared with the polymer PDM-AM-AA, the montmorillonite can reduce the crystallinity of nanocomposites to some extent. The application results show that: PDM-AM-AA / DM-MMT with 2% chromium powder used in tanning process, the performance of the leather is better, to meet the standard of clothing leather QB / T1872-2004.