超微皮革粉体表面改性的研究(续)

Surface Modification of Leather Superfine Powder

以超微粉碎皮革固体废弃物得到的超微皮革粉体为主要原料,先后用马来酸酐(MAH)、丙烯酸(AA)对其进行表面改性,得到了性能稳定的超微皮革粉体悬浮液。通过4因素3水平正交试验,分别以接枝率为指标探讨了MAH、AA改性超微皮革粉体的条件,得出最佳改性方案:在超微皮革粉体的N,N-二甲基甲酰胺(DMF)溶液中,加入50%(以超微皮革粉体质量计)的MAH,80℃恒温反应3h,得到改性产品Ⅰ,经过滤、水洗后以适量蒸馏水分散,以2%过硫酸铵(APS)溶液(以单体质量计)为引发剂,加入150%(以改性后超微皮革粉体质量计)的AA,温度为75℃,反应5h,得到最终改性产品。通过产品的红外光谱(FTIR)表征,表明接枝共聚反应的发生。

Stable leather superfine powder suspension was got by superfine powder of leather solid wastes, which was succes- sively modified by maleic anhydride（MAH） and acrylic acid （AA）. The best MAH, AA modifying conditions which both with grafting ratio as index were discussed through orthogonal test according L9 （34 ） factor levels, and as follows ： modified products I is got with the total amount of MAH account for 50% of the amount weight of leather superfine powder at 80~C for 3 hours in the solution of N,N - dimethyl formamide （DMF）. The products I is filtered ,washed with water and then some distilled water is put in. The final product is got by adding AA whose amount is 150% of the amount weight of products I ,ammonium persulfate （AlaS） whose amount is 2% of the weight of monomer as the initiator, and the reaction temperature is 75℃ for 5hours. The product is characterized by infrared spectroscopy （IR） . The results show that graft copolymerization reaction has occurred.