【摘要】：采用激光粒度分析儀和納米摩擦試驗(yàn)機(jī)分別考察了6種分散劑對(duì)基礎(chǔ)油中納米二硫化鉬(MoS_2)顆粒的分散穩(wěn)定性和油品的減摩性能,并采用紅外光譜(FTIR)分析了分散劑與MoS_2納米顆粒的接枝作用機(jī)理.試驗(yàn)結(jié)果表明,氨丙基三甲氧基硅烷(ATS)和山梨醇油酸酯(SPAN 80)分散劑因含有極性較強(qiáng)的官能團(tuán),與MoS_2接枝后能夠形成牢固的化學(xué)鍵,不僅表現(xiàn)出突出的分散穩(wěn)定效果,而且能大幅降低納米MoS_2基礎(chǔ)油的摩擦系數(shù),而其他4種分散劑中的官能團(tuán)極性較弱,與MoS_2納米顆粒的化學(xué)鍵合作用較弱,容易在摩擦外力作用下破壞,導(dǎo)致油品的摩擦系數(shù)增加.
[Abstract]:The dispersion stability and antifriction properties of six dispersants to nano-molybdenum disulfide (MoS_2) particles in base oil were investigated by laser particle size analyzer and nano-friction tester, respectively. The grafting mechanism of dispersant and MoS_2 nanoparticles was analyzed by IR (FTIR). The results showed that the dispersants of aminopropyl trimethoxysilane (ATS) and sorbitol oleate (SPAN 80) could form a strong chemical bond after grafting with MoS_2 because of the existence of strong polar functional groups. It not only showed outstanding dispersion and stabilization effect, but also significantly reduced the friction coefficient of nanometer MoS_2 base oil, while the polarity of functional groups in the other four dispersants was weaker, and the coordination with the chemical bond of MoS_2 nanoparticles was weaker. It is easy to destroy under the action of friction force, resulting in the increase of friction coefficient of oil.
【作者單位】： 空軍勤務(wù)學(xué)院學(xué)員一大隊(duì);空軍勤務(wù)學(xué)院航空油料物資系;
【基金】：國家自然科學(xué)基金(51575525) 江蘇省自然科學(xué)基金(BK20141123) 清華大學(xué)摩擦學(xué)國家重點(diǎn)實(shí)驗(yàn)室開放基金(SKLTKF14B10)資助
【分類號(hào)】：TE626.9

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