聚二烯丙基二甲基氯化铵-丙烯酰胺-乙二醛/纳米插层复合蒙脱石的制备及性能

SYNTHESIS OF POLYMER DIALLYLDIMETHYLAMMONIUM CHLORIDE-ACRYLAMIDE-GLYOXAL/NANO INTERCALATION MONTMORILLONITE AND ITS APPLICATION

用二烯丙基二甲基氯化铵(diallyldimethylammonium chloride,DM)、丙烯酰胺(acrylamide,AM)在不同用量的蒙脱石(montmorillonite,MMT)中插层环化聚合,制备出聚二烯丙基二甲基氯化铵–丙烯酰胺(polymer diallyldimethylammonium chloride–acrylamide,PDM–AM)/纳米插层复合MMT;进而与乙二醛(glyoxal,GL)反应,制备了系列聚二烯丙基二甲基氯化铵–丙烯酰胺–乙二醛(polymer diallyldimethylammonium chloride–acrylamide–glyoxal,PDM–AM–GL)/纳米插层复合MMT。红外光谱结果表明:在MMT的存在下,单体成功发生聚合。X射线衍射和透射电镜结果表明:MMT的质量分数(下同)为4%时,PDM–AM–GL/纳米插层复合MMT中MMT的层间距达到最大值,为插层型纳米复合材料。PDM–AM–GL/纳米插层复合MMT经预鞣、再用2%铬粉鞣制后的结果表明:坯革的耐湿热稳定性、填充性、抗张强度、撕裂强度均优于单独采用2%铬粉鞣制的坯革。

Montmorillonite （MMT） specimens of different dosages were modified with the same dosage of dimethyldiallylammonium （DM） through cation exchange reaction, and then polymer diallyldimethylammonium chloride-acrylamide（PDM-AM） modified MMT was prepared by free radical initiation in the MMT layer. Finally PDM-AM-glyoxal（GL）/nano intercalation MMT were prepared by using PDM-AM/nano intercalation MMT and GL. The characteristics of the PDM-AM/nano intercalation MMT and PDM-AM-GL/nano intercalation MMT composites were determined by Fourier transform infrared spectroscopy （FTIR） and X-ray diffraction （XRD）. The FTIR results show that monomer has polymerized in the layer of MMT successfully. The XRD and transmission electron microscope results indicate that inter laminar distance of MMT in the nano-material reaches the maximum when the dosage of MMT is 4 %（ in mass, the same below）. The PDM-AM-GL/nano intercalation MMT associated with 2% chromate was applied in leather making and the physical mechanical performance of the resultant leather was measured. The results indicate that PDM-AM-GL/nano intercalation MMT can improve shrinkage temperature, thickness increment and mechanical properties of leather obviously.