CAJ | 학술논문

分别选用十六烷基三甲基溴化铵（CTAB）、十二烷基二甲基苄基溴化铵（DDBAB）、十六烷基溴化吡啶（CPB）和双十二烷基二甲基溴化铵（DDAB）阳离子表面活性剂修饰的凹凸棒土作润滑脂稠化剂，制备凹凸棒土润滑脂，并对其理化性能和摩擦学性能进行测试。结果表明，阳离子表面活性剂修饰的凹凸棒土润滑脂均具有较好的热安定性和胶体安定性，有一定的腐蚀性，其中CTAB脂的综合指标最佳；DDAB含有的双烷基长链有利于凹凸棒土与基础油的亲和，CPB因共轭π键的电荷诱导作用降低了凹凸棒土表面的负电荷，这是凹凸棒土润滑脂具有优异润滑性能的原因。
분별선용십륙완기삼갑기추화안（CTAB）、십이완기이갑기변기추화안（DDBAB）、십륙완기추화필정（CPB）화쌍십이완기이갑기추화안（DDAB）양리자표면활성제수식적요철봉토작윤활지주화제，제비요철봉토윤활지，병대기이화성능화마찰학성능진행측시。결과표명，양리자표면활성제수식적요철봉토윤활지균구유교호적열안정성화효체안정성，유일정적부식성，기중CTAB지적종합지표최가；DDAB함유적쌍완기장련유리우요철봉토여기출유적친화，CPB인공액π건적전하유도작용강저료요철봉토표면적부전하，저시요철봉토윤활지구유우이윤활성능적원인。
Attapulgite(ATP)was modified by four cationic surfactants with different structures,which are cetyl trimeth-ylammonium bromide(CTAB),dodecyl dimethyl benzyl ammonium bromide(DDBAB),cetylpyridinium bromide(CPB) and didodecyldimethylammonium bromide(DDAB).The grease was prepared using modified ATP as the thickener,and its physiochemical and tribological properties were tested.The results show that the structures and properties of the cationic surfactants have an important influence on the performance of the grease.From the aspect of physicochemical properties, four kinds of greases have better thermal stability and colloidal stability and have a certain degree of corrosion,in which CTAB grease has the best comprehensive performance.From the perspective of friction and wear behavior,DDAB and CPB greases possess better friction reducing properties,because the former contains a pair of long chain alkyl which helps to combine ATP with base oil,while the latter has conjugated πbond,which can reduce the negative charge of the surface of ATP by the induction effect of the charge.This is the reason that ATP greases have the excellent tribological properties.