废旧橡胶粉表面接枝改性及其应用的研究

The Study of Waste Rubber Powder Surface Modification and Its Application

采用废旧橡胶粉为基体对其进行接枝改性。主要采用乳液聚合的方法在橡胶粉表面上接枝丙烯酸等单体。橡胶粉的前处理方法和工艺对接枝聚合反应有显著的影响。经过丙酮、碱液和酸液进行处理,可以进行丙烯酸和丙烯酰胺接枝聚合反应。利用红外光谱及扫描电镜对接枝产物进行了表征。结果表明单体已经接枝到橡胶粉上。标准API滤液测试表明,该产物是一种性能优良的无渗透钻井液处理剂。在同等条件下该材料的封闭滤失量(20 mL)小于FLC2000的封闭滤失量(36 mL)。通过TGA测试,该产物的热稳定性良好,符合实际应用的条件。

In this paper, waste rubber powder is modified by grafting. By emulsion method, the acryacid etc. can be grafted onto the rubber powder. The pretreatment of waste rubber powder is very important. It must be pretreat by acetone, NaOH solution and HC1 solution. The grafted waste rubber powder was characterized by FTIR and SEM. The results show that acrylic acid and acrylamide could be grafted onto rubber powder. Through API test, the results show that its property as low permeability additive is excellent. It could greatly prevent the fluid invasion, even better than the same kind of product FLC2000 purchased from USA. Through standard API test, under the same conditions, the filtration loss of the product（20 ml） is less than that of FLC2000（36 ml）. Through TGA test,it is shown that its stabilization under usage condition is good.