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Ureido gel lubricant used in wide temperature range as well as preparation method and application thereof
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A urea-based gel lubricant and urea-based gel technology, applied in the field of lubricants, can solve problems such as discomfort, narrow phase transition temperature range, and complex synthesis
Active Publication Date: 2021-02-19
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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[0004] However, at present, there are few research reports on supramolecular gel lubricants in the world, and most gel lubricants have problems such as narrow phase transition temperature range and complex synthesis, which are not suitable for use in a wide temperature range, which limits their use. Applications in the field of tribology
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[0041] The present invention also provides a preparation method for the urea-based gel factor described in the above technical solution, comprising the following steps:
[0043] The amine is R-NH 2 or R'-NH 2 ; The isocyanate is O=C=N-R 1 -N=C=O or R-N=C=O;
[0044] Wherein, R and R' are independently linear alkyl groups containing 8 to 18 carbon atoms; R 1 for-C 6 h 12 -.
[0045] In the present invention, unless otherwise specified, all raw materials are commercially available products well known to those skilled in the art.
[0046] In the present invention, the amine is preferably n-octylamine, dodecyl primary amine or octadecylamine; the isocyanate is preferably octyl isocyanate, hexamethylene diisocyanate, dodecyl isocyanate or octadecyl isocyanate ester. In the present invention, the dichloromethane is preferably the solvent for the reaction b...
Embodiment 1
[0067] Under ice bath conditions (0°C), dissolve (0.01mol) n-octylamine in 100mL of dichloromethane, stir to dissolve, then add (0.01mol) octyl isocyanate dropwise, stir for 30min, after the reaction is complete, stop Stir, rise to room temperature, filter and wash to obtain the urea-based gel factor (denoted as 1a');
[0068] Add 0.05669g (0.02mmol) of the 1a' into 10g of 500SN base oil, heat (85°C) and stir to dissolve the 1a' completely, cool naturally, and obtain the urea-based gel lubricant used in the wide temperature range after 1min agent (referred to as 1a).
Embodiment 2
[0070] Under ice bath conditions (0°C), dissolve (0.01mol) dodecyl primary amine in 100mL dichloromethane, stir to dissolve, then add (0.01mol) dodecyl isocyanate dropwise, stir for 30min, and react After complete, stop stirring, rise to room temperature, filter and wash to obtain the urea-based gel factor (referred to as 1b');
[0071] Add 0.0793g (0.02mmol) of the 1b' into 10g of 500SN base oil, heat (85°C) and stir to dissolve the 1b' completely, cool naturally, and obtain the urea-based gel lubricant used in the wide temperature range after 1min agent (referred to as 1b).
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Abstract
The invention relates to the technical field of lubricants, in particular to a ureido gel lubricant used in a wide temperature range as well as a preparation method and application of the ureido gel lubricant. According to the invention, a ureido gel factor with the structure shown as a formula I or a formula II contains a ureido functional group, the ureido functional group has high thermal stability, and a network structure can be formed through hydrogen bond interaction between the ureido gel factors, so that the ureido gel factor has excellent thermal stability; and finally, the prepared urea-based gel lubricant used in the wide temperature range has more excellent thermal stability than base oil. Meanwhile, the network structure formed among the ureido gel factor constrains the base oil, so that the prepared lubricant can be prevented from creeping and losing in the friction process.
Description
technical field [0001] The invention relates to the technical field of lubricants, in particular to a urea-based gel lubricant used in a wide temperature range and a preparation method and application thereof. Background technique [0002] As we all know, the use of lubricants is an effective means to reduce friction and wear, which effectively avoids unnecessary material loss and economic losses caused by friction. With the development of society, there are many kinds of lubricants, each of which has different characteristics, and has advantages and inevitable disadvantages at the same time. According to different material forms, currently commonly used lubricants can be divided into gas lubricants, liquid lubricants, solid lubricants and semi-solid lubricants. However, gas lubricants are expensive and have low load-carrying capacity, requiring high difficulty in bearing design and processing; liquid lubricants have problems such as oil leakage, oil seepage, and volatiliza...
Claims
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