CAJ | 학술논문

对润滑油的氧化机理做了简要阐述,并根据不同的抗氧作用机理,将抗氧剂分为三类:自由基清除剂(如酚类和胺类抗氧剂)、氢过氧化物分解剂(如氨基甲酸酯)和抗氧协合剂(如不含硫磷的钼酸酯).利用加压差示扫描量热法(PDSC)对不同类型抗氧剂以及它们之间的协同作用进行了考察.研究表明,作为氢过氧化物分解剂,改进的无灰氨基甲酸酯具有比胺类、酚类抗氧剂更好的性能,这显示了氢过氧化物分解型抗氧剂巨大的应用潜力.研究还表明,具有相同抗氧机理的不同抗氧剂,如酚类和胺类抗氧剂,具有协同作用;不同作用机理的两抗氧剂之间,如自由基清除剂和氢过氧化物分解剂,具有更好的抗氧化协同效果,其中,无灰氨基甲酸酯与烷基化二苯胺抗氧剂具有最佳的抗氧协同效能,可成为高温无灰抗氧剂应用的一个很好选择;不同抗氧机理的三种抗氧剂复合,如烷基化二苯胺,氨基甲酸锌和有机钼酸酯组成的三元复合抗氧剂,具有更为优秀的抗氧化性能.通过不同机理抗氧剂之间的协同,不仅可以获得优秀的抗氧化性能,还可获得附加的极压、抗磨和减摩性能,而且有的减摩、抗磨性能还非常突出,如烷基化二苯胺、氨基甲酸锌和有机钼酸酯组成的三元复合添加剂体系.
대윤활유적양화궤리주료간요천술,병근거불동적항양작용궤리,장항양제분위삼류:자유기청제제(여분류화알류항양제)、경과양화물분해제(여안기갑산지)화항양협합제(여불함류린적목산지).이용가압차시소묘량열법(PDSC)대불동류형항양제이급타문지간적협동작용진행료고찰.연구표명,작위경과양화물분해제,개진적무회안기갑산지구유비알류、분류항양제경호적성능,저현시료경과양화물분해형항양제거대적응용잠력.연구환표명,구유상동항양궤리적불동항양제,여분류화알류항양제,구유협동작용;불동작용궤리적량항양제지간,여자유기청제제화경과양화물분해제,구유경호적항양화협동효과,기중,무회안기갑산지여완기화이분알항양제구유최가적항양협동효능,가성위고온무회항양제응용적일개흔호선택;불동항양궤리적삼충항양제복합,여완기화이분알,안기갑산자화유궤목산지조성적삼원복합항양제,구유경위우수적항양화성능.통과불동궤리항양제지간적협동,불부가이획득우수적항양화성능,환가획득부가적겁압、항마화감마성능,이차유적감마、항마성능환비상돌출,여완기화이분알、안기갑산자화유궤목산지조성적삼원복합첨가제체계.
The basic oxidation mechanism of lubricant was reviewed briefly. The antioxidants were classified as three major species: radical scavenger (for examples, phenol and amine antioxidants), hydroperoxide decomposer (for examples, dithiocarbamate derivatives), and antioxidation synergist (for example, phosphorous and sulfur free molybdate ester). Pressurized Differential Scanning Calorimetry (PDSC) was employed to evaluate the antioxidation performances of different antioxidants and their synergism. The research indicated, as a hydroperoxide decomposer, modified ashless dithiocarbamate possesses better antioxidation performance than phenol and amine antioxidants, which reveals the great application potential of hydroperoxide decomposer as antioxidant. The investigation also showed that, the antioxidants with same action mechanism, for example, as both radical scavengers, phenol and amine antioxidants are synergistic (homosynergism); But the synergistic effects between two antioxidants with different action mechanism, such as radical scavenging phenol and amine antioxidants, and hydroperoxide decomposing ashless dithiocarbamate, are much stronger (heterosynergism), and the heterosynergism between dithiocarbamate and alkylated diphenylamine is outstanding, which can serve as high temperature ashless high performance antioxidant combination; The heterosynergism among three antioxidants with three different action mechanisms, for example, the tri-component combination of alkylated diphenylamine, zinc dithiocarbamate and organic molybdate ester, can achieve excellent antioxidation performance. The heterosynergism of antioxidants not only exhibits good antioxidation properties, but also brings extra extreme pressure (EP), antiwear and friction-reducing performances, for instant, the tri-component combination of alkylated diphenylamine, zinc dithiocarbamate and organic molybdate ester is also an outstanding friction-reducing and antiwear additives.