High-damping intelligent vibration attenuation sheet material and preparation method thereof
A technology of intelligent damping and sheet materials, which is applied in the field of material preparation of high-damping intelligent damping pad accessories for assembled ballastless tracks, can solve the problems of reducing track service life, increasing railway maintenance costs, and accelerating fatigue cracks, etc., to achieve Effects of improving binding interface, reducing maintenance and testing costs, and preventing particle agglomeration
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0043] The invention provides a preparation method of polyurethane IPN / piezoelectric ceramics / Mxenes high damping intelligent vibration damping sheet material, comprising the following steps:
[0044] 1. Self-assembly of piezoelectric ceramics / Mxenes, such as figure 1 shown:
[0045] (1) Preparation of Mxenes 2D sheet: add MAX phase (Ti 2 AlC) ceramics, requiring the addition of 0.5mol-1.5mol NH 4 F with 5mol-12mol H 2 SO 4 , where in situ HF (hydrofluoric acid) and Ti 2 The molar ratio of AlC is 9:1, stirring for 20h-30h, then washing with deionized water, and after centrifugation at 8000-10000rad / min, the supernatant is poured out, and the pH of the mixture is required to be washed to 5-7;
[0046] (2) Peel off the Mxenes 2D sheet: the mixed solution obtained from step (1) is required to be subjected to ultrasonic treatment for 1h-3h, and after the ultrasonication is completed, it is required to undergo centrifugation at 2000-4000rad / min for 10min-30min, and the upper t...
Embodiment 1
[0067] A preparation method of a high damping intelligent vibration damping sheet material, comprising the following steps:
[0068] 1) Weigh 0.5gTi 2 AlC ceramic particles, add 1mol NH4F and 9mol concentrated sulfuric acid, stir in a plastic beaker and ventilated environment for 24h; then wash the mixture with deionized water, centrifuge at 10000rad / min for 15min, pour off the supernatant and add new deionized water . The centrifugation operation was thus repeated six times.
[0069] 2) Further, the cleaned mixed solution was ultrasonicated for 1 h and then peeled off the Mxenes 2D sheet, then centrifuged at 3500 rad / min for 30 min, and the supernatant was removed to obtain the Mxenes 2D sheet aqueous solution.
[0070] 3) Weigh 20g of ceramic particles (PZT), add 50 parts of deionized water for ultrasonic dispersion for 30min to obtain a suspension, then add 10g of the Mxenes 2D lamellar aqueous solution obtained in step 2), stir for 10h to realize self-assembly, and obtai...
Embodiment 2
[0077] A preparation method of a high damping intelligent vibration damping sheet material, comprising the following steps:
[0078] 1) Weigh 0.5g Ti2AlC ceramic particles, add 1mol NH4F and 9mol concentrated sulfuric acid, stir in a plastic beaker and ventilated environment for 24h; then wash the mixture with deionized water, centrifuge at 10000rad / min for 15min, pour off the supernatant and add Fresh deionized water. The centrifugation operation was thus repeated six times.
[0079] 2) Further, the cleaned mixed solution was ultrasonicated for 1 h and then peeled off the Mxenes 2D sheet, then centrifuged at 3500 rad / min for 30 min, and the supernatant was removed to obtain the Mxenes 2D sheet aqueous solution.
[0080] 3) Weigh 20g of ceramic particles, add 50g of deionized water for ultrasonic dispersion for 30min to obtain a suspension, then add 15g of the aqueous solution of Mxenes 2D lamellae obtained in step 2), stir for 10h to realize self-assembly, and obtain a mixed...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More