【摘要】 采用硬脂酸、吐温80、柠檬酸3种有机试剂分别对Mo尾矿进行表面预处理,再用其改性聚氨酯。探讨了3种不同表面处理剂处理后的钼尾矿对聚氨酯乳液的储存稳定性以及膜的体系相容性、耐水性、透光率、热稳定性等性能的影响。结果表明,吐温80改性制得聚氨酯乳液的储存稳定性以及膜的体系相容性、热稳定性、耐水性均较好,热失重率10%、50%、90%对应的温度分别为245. 73、368. 49、458. 24℃,吸水率为120. 1%,但透光率最低,仅为58. 1%。硬脂酸改性制得的聚氨酯综合性能次之,柠檬酸改性制得的聚氨酯综合性能最差。采用硬脂酸、柠檬酸、吐温80制得的改性聚氨酯材料的综合性能均优于未加表面处理剂制备的聚氨酯。更多还原

【Abstract】 Polyurethane was modified by Mo tailings,which were pretreated by three different kinds of modifiers including stearic acid,citric acid and tween 80,respectively. The effect of Mo tailings pretreated by three different kinds of modifiers on properties of the obtained polyurethane was discussed. The properties such as the storage stability of polyurethane emulsion and system compatibility,water resistance,thermal stability and light transmittance of membrane were studied. Results showed that the storage stability of polyurethane emulsion and systematic compatibility,thermal stability and water resistance of the membrane modified by Tween 80 were excellent. The corresponding temperatures of 10%,50% and 90% of the thermal weight loss rate were 245. 73,368. 49 and 458. 24℃,respectively. The water absorption rate was 120. 1%. Besides,the transmittance was the lowest,and the transmittance was only 58. 1%. The comprehensive properties of polyurethane modified by stearic acid were placed in second and the comprehensive properties of polyurethane modified by citric acid were worst.However,the comprehensive properties of polyurethane modified by Mo tailings which were pretreated by three different kinds of modifiers including stearic acid,citric acid and Tween 80 were better than unmodified polyurethane.更多还原