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CN-122011302-A - Vehicle-mounted high-temperature ceramic high-molecular polymer and preparation method thereof

CN122011302ACN 122011302 ACN122011302 ACN 122011302ACN-122011302-A

Abstract

The invention relates to the technical field of high molecular polymers, in particular to a vehicle-mounted high-temperature ceramic high molecular polymer and a preparation method thereof, wherein the high molecular polymer realizes the deep fusion and function synergy of an organic phase and an inorganic phase on a molecular scale by introducing a ceramic precursor and mixing with a reaction monomer, meanwhile, by controlling the thermal decomposition time of AZO, the AZO is matched with the fire development and the ceramic process, and a foam ceramic composite protective layer can be formed when the AZO faces high temperature, so that more durable and reliable heat insulation protection is provided for the chip.

Inventors

  • QIU WENJIE
  • LIU QIFENG
  • Gan Shengbing
  • SUN HUANLE

Assignees

  • 道麒信创(浙江)科技有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The preparation method of the vehicle-mounted high-temperature ceramic high-molecular polymer is characterized by comprising the following preparation steps of: S1, uniformly mixing an initiator, a reaction monomer and AZO@SiO 2 , adding a sodium hydroxide aqueous solution at 0-5 ℃, and stirring for 20-30 min to obtain a monomer aqueous solution; s2, taking out 30-50 v% of monomer aqueous solution, adding precursor solution at room temperature, shearing for 1-3 min at 10000-15000 rpm, cooling to 0-3 ℃, standing and curing to form prepolymer solution; And S3, under the protection of inert gas, adding an internal crosslinking agent into the residual monomer aqueous solution, dropwise adding a prepolymer solution after dissolution, controlling the dropwise adding time to be 30-40 min, continuously stirring for 10-15 min after the dropwise adding is finished, then carrying out gradient heat preservation, cutting, vacuum drying and crushing, and sieving through 10-40 meshes to obtain the vehicle-mounted high-temperature ceramic high-molecular polymer.
  2. 2. The method for preparing the vehicle-mounted high-temperature ceramic high-molecular polymer according to claim 1, wherein in the step S1, AZO@SiO 2 accounts for 5% -10% of the total mass of the reaction monomers.
  3. 3. The method for preparing the vehicle-mounted high-temperature ceramic high-molecular polymer according to claim 1, wherein in the step S1, the initiator accounts for 0.02% -0.07% of the total mass of the reaction monomers.
  4. 4. The method for preparing a high-temperature ceramic polymer for vehicles according to claim 1, wherein in the step S1, the preparation steps of azo@sio 2 are as follows: Preparing a reaction base solution by adopting absolute ethyl alcohol, deionized water and ammonia water, adding AZO, performing ultrasonic treatment to form a suspension, then dropwise adding TEOS, continuously stirring for 1-3 hours after dropwise adding, naturally cooling to room temperature, standing and ageing for 8-16 hours, then adding MPS, stirring for 1-4 hours at room temperature, centrifuging, washing, vacuum drying, and sieving to obtain AZO@SiO 2 .
  5. 5. The method for preparing the vehicle-mounted high-temperature ceramic high-molecular polymer according to claim 4, wherein the volume ratio of absolute ethyl alcohol, deionized water and ammonia water in the reaction base solution is (80-84): 10-14): 3-7.
  6. 6. The method for preparing the vehicle-mounted high-temperature ceramic high-molecular polymer according to claim 4, wherein the MPS accounts for 3% -8% of the total volume of TEOS.
  7. 7. The method for preparing the vehicle-mounted high-temperature ceramic high-molecular polymer according to claim 1, wherein in the step S2, the precursor solution is prepared by sequentially adding glacial acetic acid and aluminum sol into deionized water, stirring at room temperature, adding MTMS, heating to 30-40 ℃ and stirring to obtain the precursor solution.
  8. 8. The method for producing a high-temperature ceramifying high polymer for vehicle according to claim 7 wherein said precursor solution further contains acetylacetone.
  9. 9. The method for preparing a high-temperature ceramic polymer for vehicles according to claim 1, wherein in the step S3, the internal crosslinking agent accounts for 0.02% -0.05% of the total mass of the reaction monomers.
  10. 10. The method for preparing the vehicle-mounted high-temperature ceramic high-molecular polymer according to claim 1, wherein in the step S3, the gradient heat preservation is sequentially carried out for 1-3 hours at 20-40 ℃, 1-3 hours at 50-70 ℃ and 1-2 hours at 90-120 ℃.

Description

Vehicle-mounted high-temperature ceramic high-molecular polymer and preparation method thereof Technical Field The invention belongs to the field of high molecular polymers, and particularly relates to a vehicle-mounted high-temperature ceramic high molecular polymer and a preparation method thereof. Background The black box (event recorder) of the motor train is responsible for recording mass data such as train running state, key parameters, control instructions and the like, and is a key basis for accident analysis, responsibility definition and safety improvement. However, in a very small number of major accidents, especially in the event of fire, extremely high temperatures exceeding 700 ℃ are generated for a long time, which constitutes a devastating threat to the data storage chip of the inner core of the black box. Traditional protective materials (such as epoxy resin and silica gel) are easy to decompose, carbonize or melt under such severe thermal environments, so that the protective effect is lost, finally, the chip is damaged, the data is permanently lost, and the most important technical support is lost for accident investigation. At present, although relevant protection standards (such as fireproof standards) of domestic and foreign black boxes have clear regulations on short-time fireproof performance, when dealing with continuous and severe real fire scenes, the survival guarantee capability of an internal chip still has room for improvement. Although hydrogel can absorb heat in a large amount by the phase change (vaporization) of water at high temperature, a short and effective heat barrier is formed around the chip, so that heat transfer is delayed, and precious survival time is strived for a core data storage area. But when facing the thermal shock environment in fire accident, the hydrogel can only hold off heat and can not provide durable protection for the chip. Patent CN102408791A discloses a flame-retardant smoke-suppressing type humidity-regulating functional coating and a preparation method thereof, wherein hydrotalcite/poly (sodium acrylate-acrylamide) "intercalation composite particles are prepared by adopting inverse suspension polymerization and then are blended with styrene-acrylic emulsion, the intercalation structure is decomposed at 200-400 ℃ to release CO 2/H2 O, the effects of absorbing heat and diluting oxygen are achieved, however, a residual layer after hydrotalcite decomposition is loose MgO-Al 2O3 mixed oxide, subsequent sintering densification is avoided, and the residual layer collapses and the protection effect is reduced along with subsequent temperature rise. Therefore, the invention aims to provide a hydrogel material which can provide more durable and reliable heat insulation protection for chips at extremely high temperature and improve the data preservation rate of the black box in extreme accidents. Disclosure of Invention In order to overcome the defects in the prior art, the method realizes deep fusion and function synergy of an organic phase and an inorganic phase on a molecular scale by introducing a ceramic precursor and a reaction monomer to mix, and simultaneously obtains an acrylic polymer capable of forming a foam ceramic composite protective layer when facing high temperature by controlling the thermal decomposition time of AZO to match with the development of fire and the ceramic process, thereby providing more durable and reliable heat insulation protection for chips. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The invention provides a vehicle-mounted high-temperature ceramic high-molecular polymer, which comprises the following preparation steps: S1, uniformly mixing an initiator, a reaction monomer and AZO@SiO 2, adding a sodium hydroxide aqueous solution at 0-5 ℃, and stirring for 20-30 min to obtain a monomer aqueous solution; s2, taking out 30-50 v% of monomer aqueous solution, adding precursor solution at room temperature, shearing for 1-3 min at 10000-15000 rpm, cooling to 0-3 ℃, standing and curing to form prepolymer solution; And S3, under the protection of inert gas, adding an internal crosslinking agent into the residual monomer aqueous solution, dropwise adding a prepolymer solution after dissolution, controlling the dropwise adding time to be 30-40 min, continuously stirring for 10-15 min after the dropwise adding is finished, then carrying out gradient heat preservation, cutting, vacuum drying and crushing, and sieving through 10-40 meshes to obtain the vehicle-mounted high-temperature ceramic high-molecular polymer. In some embodiments, in step S1, the azo@sio 2 accounts for 5% -10% of the total mass of the reaction monomers. In some embodiments, in step S1, the initiator accounts for 0.02% -0.07% of the total mass of the reaction monomers. The organic network in the high molecular polymer provides normal temperature toughness, and the inorganic network provides a high tempera