Method for Preparing Mesoporous Sound-Absorbing Material Particles and Mesoporous Sound-Absorbing Material Particles

Patent metadata

Field	Value
Publication number	US-2019092700-A1
Application number	US-201615781297-A
Country	US
Kind code	A1
Filing date	May 18, 2016
Priority date	Dec 3, 2015
Publication date	Mar 28, 2019
Grant date	—

Abstract

The invention discloses a method for preparing mesoporous sound-absorbing material particles and mesoporous sound-absorbing material particles. The preparation method comprises the following steps. In step 1, sound-absorbing material powder and a templating agent are mixed with a binding agent and water to form sol slurry, the templating agent is an organic monomer or a linear polymer, and the templating agent has a purity greater than 95%. In step 2, the sol slurry is dropped into forming oil, and the droplets of the sol slurry are aged in the forming oil to form gel particles. In step 3, the gel particles are taken out from the forming oil and the gel particles are dried to form mesoporous sound-absorbing material particles. In step 4, the mesoporous sound-absorbing material particles are roasted.

First claim

1 . A method for preparing mesoporous sound-absorbing material particles, comprising:
step 1: mixing sound-absorbing material powder, a templating agent a binding agent, and water to form sol slurry, wherein the templating agent is an organic monomer or a linear polymer, and the purity of the templating agent is greater than 95%; step 2: dropping the sol slurry into forming oil, wherein the droplets of the sol slurry are aged in the forming oil to form gel particles; step 3: taking out the gel particles from the forming oil, and drying the gel particles to form mesoporous sound-absorbing material particles; and step 4: roasting the mesoporous sound-absorbing material particles.

2 . The method according to claim 1 , wherein in step 1, the proportion of the mass of the added templating agent to the total mass of the sol slurry ranges from 1% to 35%.

3 . The method according to claim 1 , wherein in step 1, the proportion of the mass of the added binding agent to the total mass of the sol slurry ranges from 1% to 35%, and the binding agent is organosilicone sol or fibrous resin.

4 . The method according to claim 1 , wherein in step 1, an auxiliary agent is added to the sol slurry, the proportion of the mass of the added auxiliary agent to the total mass of the sol slurry ranges from 0.02% to 10%, and the auxiliary agent is a defoaming agent, a coagulant or a homogenizer.

5 . The method according to claim 1 , wherein in step 2, the temperature of the forming oil ranges from 40 to 120° C.

6 . (canceled)

7 . (canceled)

8 . (canceled)

9 . A mesoporous sound-absorbing material particle, wherein the mesoporous sound-absorbing material particle has a specific surface area in a range of 250-650 m2/g and a pore volume in a range of 0.2-2.0 ml/g, and in the mesoporous sound-absorbing material particle, the pore volume of the mesopores with a pore size of 0.5-35 μm accounts for 15%-85% of the total pore volume.

10 . The mesoporous sound-absorbing material particle according to claim 9 , wherein the diameter of the mesoporous sound-absorbing material particle is in a range of 0.05-1.0 mm and a bulk density thereof is in a range of 0.25-0.95 g/ml.

11 . The method according to claim 5 , wherein the forming oil is white lubricating oil.

12 . The method according to claim 5 , wherein the forming oil is stator oil.

13 . The method according to claim 5 , wherein the forming oil is machine tool oil.

14 . The method according to claim 5 , wherein the forming oil is vacuum pump oil.

15 . The method according to claim 5 , wherein the forming oil is a mixture of lubricating oil and aliphatic hydrocarbons.

16 . The method according to any one of claim 5 , wherein the diameter of the sol slurry droplets is between 100-400 microns.

17 . The method according to any one of claim 5 , wherein the formulated and sufficiently and uniformly processed sol slurry in step 1 is placed in the forming oil by means of atomization.

18 . The method according to any one of claim 5 , wherein the formulated and sufficiently and uniformly processed sol slurry in step 1 is placed in the forming oil by means of atomization.

19 . The method according to claim 1 , wherein in step 3, the gel particles are dried in an inert gas in a temperature range of 40−150° C.

20 . The method according to claim 1 , wherein in step 4, the roasting temperature ranges from 120 to 850° C., the heating rate of the roasting ranges from 20 to 120° C./h, and the time of the roasting ranges from 0.5 to 96 hours.

21 . The method according to claim 20 , wherein the roasting temperature ranges from 280 to 550° C., the heating rate of the roasting ranges from 25 to 65° C./h, and the time of the roasting ranges from 20 to 65 hours.

22 . The method according to claim 20 , wherein in step 4, the content of oxygen in the roasting atmosphere ranges from 0.1% to 21%.

Assignees

• Goertek Inc

Inventors

• Cao Xiaodong

Classifications

• G10K11/162

  Selection of materials · CPC title

• C04B38/067 Primary

  Macromolecular compounds (C04B38/062 takes precedence) · CPC title

• C04B38/0067

  characterised by the density of the end product · CPC title

• C04B38/0045 Primary

  by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes · CPC title

• C04B38/0054

  the pores being microsized or nanosized · CPC title