Low friction properties of associated carboxylic acids induced by molecular orientation
Low friction properties of associated carboxylic acids induced by molecular orientation
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DOI：
10.1016/j.triboint.2016.10.042
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发表时间：
2017-09
影响因子：
6.2
通讯作者：
Renguo Lu;S. Mori;H. Tani;N. Tagawa;S. Koganezawa
中科院分区：
文献类型：
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作者：
Renguo Lu;S. Mori;H. Tani;N. Tagawa;S. Koganezawa
分子排列是实现超低摩擦系数的关键。我们以油酸和对戊基苯甲酸为原料，通过氢键作用合成了缔合羧酸，分子中含有一个苯环和一个八元环状羧酸。我们研究了将它们添加到基础油中时的摩擦性能，发现相关的羧酸降低了弹流润滑和边界润滑中的牵引系数，尽管粘度增加了。原位显微傅里叶变换红外光谱分析表明，八元环羧酸和苯环均平行于剪切力取向，摩擦系数较低。
Molecular alignment is key to achieving an ultra-low friction coefficient. We prepared associated carboxylic acids using oleic acid and p-pentylbenzoic acid via hydrogen bonding, involving a benzene ring and an eight-membered cyclic carboxylic acid in the molecules. We investigated frictional properties when these were added into a base oil and found that the associated carboxylic acids decreased the traction coefficient in EHL and boundary lubrication, although the viscosity increased. An in situ micro Fourier transform infrared spectroscope showed that both the eight-membered cyclic carboxylic acid and the benzene ring were oriented parallel to the shearing force, leading to the low friction coefficient.