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CN-122012037-A - Organosilicon cooling liquid and preparation method thereof

CN122012037ACN 122012037 ACN122012037 ACN 122012037ACN-122012037-A

Abstract

The invention relates to an organosilicon cooling liquid and a preparation method thereof, belonging to the technical field of cooling liquid; the invention prepares a corrosion inhibitor by self, and after the corrosion inhibitor is coordinated with nano alumina, hydrogen-containing siloxane is modified to obtain component B polyether modified silicone oil, and then the component B polyether modified silicone oil is blended with component A alkyl modified silicone oil to obtain organic silicon cooling liquid, phosphate groups in the corrosion inhibitor have stronger metal affinity, can be adsorbed on the surfaces of metals such as copper, aluminum and the like, forms a layer of compact and firm protective film, the corrosion of metal is inhibited, and at the same time, the phosphate groups are adsorbed on the surface of nano alumina serving as a filler, so that the alumina filler is effectively prevented from agglomerating, and a plurality of phosphate groups are used as side groups and are connected onto a polyether-silicone oil molecular chain, so that the adjacent molecular chains are blocked from being close to and stacked, the viscosity of the cooling liquid is reduced, and the cooling liquid can also interact with a polar surface together with a polyether chain segment, so that the compatibility of the silicone oil and the polar surface is improved.

Inventors

  • WANG XIAOWEI
  • ZHOU DELONG

Assignees

  • 山东诺唯亚新材料有限公司

Dates

Publication Date
20260512
Application Date
20260204

Claims (10)

  1. 1. The preparation method of the organic silicon cooling liquid is characterized by comprising the following steps of: Preparing component B polyether modified silicone oil, namely performing nucleophilic substitution reaction on amino alkene and dichloroalkane to obtain a corrosion inhibitor precursor, performing nucleophilic substitution reaction on the corrosion inhibitor precursor and dialkyl phosphite to obtain a corrosion inhibitor, performing coordination reaction on the corrosion inhibitor and nano alumina to obtain a modifier, and performing hydrosilyl addition on the modifier, allyl end-capped polyether and hydrogen-containing siloxane under the action of a platinum catalyst to obtain the component B polyether modified silicone oil; The preparation method of the organic silicon cooling liquid comprises the steps of carrying out hydrosilylation reaction on alkyl olefin and hydrogen-containing silicone oil under the action of a platinum catalyst to obtain component A alkyl modified silicone oil, and then blending the component A alkyl modified silicone oil, the component B polyether modified silicone oil, the antioxidant and the defoamer to obtain the organic silicon cooling liquid.
  2. 2. The method for preparing an organosilicon coolant according to claim 1, wherein the amino olefin has a general structural formula of Wherein n is a natural number, and satisfies that n is more than or equal to 2 and less than or equal to 6, and the structural formula of the dichloroalkane is Wherein n is a natural number and satisfies 1≤n≤5, and the structural formula of the alkyl olefin is Wherein n is a natural number and satisfies 2≤n≤14.
  3. 3. The method for producing a silicone coolant according to claim 1, wherein the component A alkyl-modified silicone oil is at least one selected from alkyl-modified silicone oils having the following chemical structural formula (1), R 1 R 2 R 3 SiO(R 4 MeSiO) m (Me 2 SiO) n SiR 5 R 6 R 7 (1) In the formula (1), R 1 ,R 2 ,R 3 ,R 5 ,R 6 ,R 7 is independently selected from alkyl of C 1 -C 3 , R 4 is alkyl of C 6 -C 18 , m and n are positive numbers, and 0.1< m/(m+n) <0.5,5< m+n <40 is satisfied.
  4. 4. The method for preparing an organosilicon cooling liquid according to claim 1, wherein the viscosity of the component A alkyl modified silicone oil is less than or equal to 80 mPa.s at 25 ℃.
  5. 5. The preparation method of the organic silicon cooling liquid according to claim 1 is characterized in that the mass ratio of amino alkene to dichloroalkane is 8.5-14:11-17, the mass ratio of corrosion inhibitor precursor to dialkyl phosphite is 20-34:20-25, the mass ratio of corrosion inhibitor to nano alumina is 32-52:25-35, the mass ratio of hydrogen-containing siloxane to modifier to allyl end-capped polyether to platinum catalyst is 100-110:32-52:30-50:0.1-0.3, the mass ratio of hydrogen-containing siloxane to alkyl alkene to platinum catalyst is 400-600:200-300:0.1-0.3, and the mass ratio of polyether modified silicone oil to alkyl modified silicone oil to antioxidant to defoamer is 25-150:350-475:9-11:5-6.
  6. 6. The method for preparing the organic silicon cooling liquid according to claim 1, wherein the dialkyl phosphite is one of dimethyl phosphite and diethyl phosphite, the platinum catalyst is one of Kastedt catalyst and Speier catalyst, and the antioxidant is at least one of antioxidant 1010, antioxidant 1076 and antioxidant 1035.
  7. 7. The method for producing a silicone coolant according to claim 1, wherein the component B polyether-modified silicone oil is at least one selected from polyether-modified silicone oils having the following chemical structural formula (2), R 8 R 9 R 10 SiO(R 11 MeSiO) p (R 12 Me 1 SiO) q SiR 13 R 14 R 15 (2) In the formula (2), R 8 ,R 9 ,R 10 ,R 13 ,R 14 ,R 15 is respectively and independently selected from alkyl of C 1 -C 3 , R 11 is selected from a group of the following structural formula (3), p and q are positive numbers, 0<p/(p+q) <0.3,3< p+q <80, and R 12 is a corrosion inhibitor bonding structure, -(CH 2 CH 2 O) s (CHCH 3 CH 2 O) t R 16 (3) In the formula (3), R 16 is C 1 -C3 alkyl, s is more than or equal to 1, t is more than or equal to 0, and 3< s+t <30, s+t >30, s/(s+t) >0.4 are satisfied.
  8. 8. The preparation method of the organic silicon cooling liquid according to claim 1, wherein the weight ratio of the component A in the whole cooling liquid formula is 70% -95%, and the content of the component B polyether modified silicone oil is 5% -30%.
  9. 9. An organosilicon coolant, characterized in that the organosilicon coolant is prepared by the preparation method of any one of claims 1-8.
  10. 10. The silicone coolant of claim 9, wherein the silicone coolant is used in open or submerged cooling systems, server thermal management.

Description

Organosilicon cooling liquid and preparation method thereof Technical Field The invention belongs to the technical field of cooling liquid, and particularly relates to an organosilicon cooling liquid and a preparation method thereof. Background With the rapid development of information technology, the computing capability of the server is continuously improved, and the power density of the server is also greatly increased, so that a large amount of heat is generated in the running process of the server. The immersion liquid cooling technology is used as an efficient heat dissipation mode, and cooling liquid can be used for absorbing heat generated by a server, so that efficient heat dissipation is realized. Currently, submerged cooling fluids on the market are mainly hydrocarbons, fluorocarbons and polysiloxanes. The hydrocarbon cooling liquid has certain chemical stability and thermal stability, but has relatively weak insulating performance, is easy to oxidize or decompose in high temperature and high humidity environment, and contains impurities with certain corrosiveness to metal parts, so that the internal components of the server can be damaged after long-term use. In addition, hydrocarbon cooling liquid and partial polymer materials have poor compatibility, so that the materials are easy to swell and soften, and the tightness and the service life of a cooling system are influenced. Although fluorocarbon cooling liquid has excellent insulating property and chemical inertness, the cooling liquid has certain harm to the environment and does not accord with the development trend of green environmental protection. Polysiloxane-based cooling fluids, typically polydimethylsiloxane, are a new choice for cooling fluids. In terms of material compatibility, the polysiloxane cooling liquid has good suitability with non-organic silicon components in data center equipment, can avoid material damage caused by chemical incompatibility, has high stability and strong degradation resistance, can maintain stable performance under long-time use and complex environment, and effectively reduces maintenance cost and replacement frequency, however, polysiloxane cooling liquid has certain limitation, and can easily cause the organic silicon rubber material to swell so as to influence the mechanical property and sealing property of the organic silicon rubber material. In addition, the polysiloxane cooling liquid has a certain corrosion inhibition effect, but is unstable in the operation process, is easy to separate out and adhere to the inside of the radiator, and reduces the heat radiation effect. Based on the above, the invention provides a preparation method of the organic silicon cooling liquid. Disclosure of Invention The invention aims to provide an organosilicon cooling liquid and a preparation method thereof, which are used for solving the problems in the background art. The aim of the invention can be achieved by the following technical scheme: the preparation method of the organic silicon cooling liquid comprises the following steps: Firstly, under the protection of nitrogen, adding hydrogen-containing siloxane, alkyl olefin and a platinum catalyst into a three-neck flask, installing a condenser pipe and a thermometer, starting magnetic stirring, and reacting for 3-5 hours at 70-80 ℃ to obtain component A alkyl modified silicone oil; and secondly, adding the component A alkyl modified silicone oil, the component B polyether modified silicone oil, the antioxidant and the defoamer into a stirrer, uniformly mixing, standing for curing, and filtering and removing impurities to obtain the organosilicon cooling liquid. Further, the component B polyether modified silicone oil has polyether, phosphate structure and polymerizable double bond in the structure. Further, the component B polyether modified silicone oil is prepared by the following steps: s1, adding amino olefin, dichloroalkane, sodium bicarbonate and ethanol into a three-neck flask, mounting a condenser tube and a thermometer, starting magnetic stirring, reacting for 40-50 min at 70-80 ℃, cooling to room temperature after the reaction is finished, removing a solvent by rotary evaporation, extracting with ethyl acetate, retaining an organic phase, washing the organic phase with water, and drying to obtain a corrosion inhibitor precursor; S2, adding a corrosion inhibitor precursor, dialkyl phosphite, iodine and toluene into a three-neck flask, mounting a condenser tube and a thermometer, starting magnetic stirring, reacting for 30-40 min at 30-40 ℃, cooling to room temperature after the reaction is finished, removing a solvent by rotary evaporation, extracting with ethyl acetate, retaining an organic phase, washing the organic phase with saturated saline water, and drying to obtain the corrosion inhibitor; S3, adding a corrosion inhibitor, nano aluminum oxide and dimethylbenzene into a three-neck flask, mounting a condenser tube and a thermometer, starting magnetic