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A kind of cnt-sio 2 /nbr material preparation method and atomizing spray gun

An atomizing spray gun and atomizing nozzle technology, applied in the field of rubber mixing, can solve the problems of re-agglomeration of fillers, reduce compatibility, large water consumption, etc., and achieve the effects of improving dispersibility, low production cost, and small rolling resistance.

Active Publication Date: 2021-04-20
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The emulsion blending method can make CNT and other fillers more uniformly dispersed in the rubber matrix. Usually, acid and other demulsifiers are used to realize the co-precipitation of latex particles and CNT, but adding acid or other chemical reagents for flocculation and subsequent dehydration and drying process is easy Re-agglomeration of fillers will cause problems of low efficiency, long time consumption and large water consumption;
[0006] (2) Simultaneous mechanical blending method, solution blending method and melt blending method also have some unavoidable defects in the rubber composite material prepared due to technological problems;
[0007] (3) Since the multi-CNT and filler enter the gas-phase atomization spray gun when mixed, it is easy to generate group accumulation, which reduces the compatibility during the mixing process

Method used

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  • A kind of cnt-sio <sub>2</sub> /nbr material preparation method and atomizing spray gun
  • A kind of cnt-sio <sub>2</sub> /nbr material preparation method and atomizing spray gun
  • A kind of cnt-sio <sub>2</sub> /nbr material preparation method and atomizing spray gun

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like figure 1 As shown, the present invention provides a CNT-SiO 2 / NBR composite material preparation method, is characterized in that: comprise the steps:

[0050] S100, use a ball mill to grind silicon dioxide to 100-200 meshes, place the ground silicon dioxide and deionized water in a beaker, and use a high-speed shearing machine to disperse into a silicon dioxide aqueous dispersion with a mass fraction of 25 wt%, And stirred by a stirrer to obtain 25wt% silica slurry;

[0051] S200, stirring and mixing 3 parts by mass of CNT aqueous solution and 30 parts by mass of silica slurry to form CNT-SiO 2 Mixed solution, and the dry glue mass fraction of 100 mass parts is that the centrifugal concentration nitrile latex of 60wt% adds CNT-SiO 2 In the mixture, stir the CNT-SiO with a blade stirrer 2 / NBRL mixture, complete CNT-SiO 2 Preparation of / NBRL mixture;

[0052] S300, the CNT-SiO to be prepared 2 / NBRL mixture is poured into the container tank, and the CNT-Si...

Embodiment 2

[0062] like Figure 2 to Figure 6 As shown, the present invention also provides a CNT-SiO 2 / NBR composite material ultrasonic atomization spray gun, including an assembly frame 1, and a batching bottle 2 arranged on the assembly frame 1, an air pump 3 is arranged on the assembly frame 1 located on one side of the batching bottle 2, and will be prepared The CNT / NBR mixed liquid is injected into the batching bottle 2, and the injection air pressure is provided by the air pump 3 and the pressure change in the batching bottle 2 is controlled to realize spraying under uniform pressure.

[0063] The inner side of the assembly frame 1 of the present invention is provided with a micro-movement assembly 4, and several atomizing nozzles 5 are arranged on the micro-motion assembly 4, and the left and right lateral vibrations of the atomizing nozzles are driven by the micro-motion assembly 4, thereby ensuring the stability of the atomizing nozzles 5. The spray surface moves slightly in ...

Embodiment 3

[0074] like Figure 7 , Figure 8 and Figure 9As shown, the ball mill used in the preparation of composite materials in Example 1 provided by the present invention includes a base B1 and a mounting groove B2 arranged on the base B1, and a planetary wheel B3 driven by a motor is arranged inside the mounting groove B2 , and there are at least three star wheels of the planetary wheel B3, the star wheel of the planetary wheel B3 is provided with a fixed bracket B4, the fixed bracket B4 is equipped with a grinding tank B6 through a movable hinge device B5, and a pressing rod device B7 is installed on the grinding tank B6 , the upper part of the grinding tank B6 is provided with a turntable B8, and the turntable B8 is fixedly connected to the installation groove B2 through a bracket, the turntable B8 includes an inner wheel B801 and an outer track ring B802, and the inner wheel B801 and the outer track ring The opposite surfaces of B802 are provided with racks, and the top of the...

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Abstract

The invention discloses a CNT-SiO 2 / NBR material preparation method, S100, grind silica to 100-200 mesh, place deionized water in a beaker, disperse into silica water dispersion, and stir to obtain silica slurry; S200, CNT aqueous solution and di The silica slurry was stirred and mixed, and the centrifuged concentrated nitrile latex was added to CNT‑SiO 2 In the mixture, stir to complete the CNT‑SiO 2 Preparation of / NBRL mixed solution; S300, CNT-SiO 2 / NBRL mixture using gas phase assisted jet atomization gun to CNT‑SiO 2 / NBRL mixture is sprayed onto the roller of the high-temperature open mill; S400, adjust the temperature of the roller to make CNT-SiO 2 / NBRL mixed solution is atomized into droplets to obtain dry masterbatch, and the scraper on the roller scrapes off the masterbatch and collects it for later use; S500, banbury the prepared masterbatch on the open mill, and add masterbatch and zinc oxide in turn ZnO, stearic acid SAD, DPG accelerator, anti-aging agent 4020 are mixed to obtain CNT-SiO 2 / NBR composite material, the process is simple and controllable, and the principle is scientific and reasonable, which ensures uniform atomization and mixing compatibility, and avoids secondary dripping caused by water vapor adhesion.

Description

technical field [0001] The invention relates to the field of rubber mixing, specifically a CNT-SiO 2 / NBR material preparation method and atomizing spray gun. Background technique [0002] Mixing is the first step in the rubber processing process, and it is also the most critical process. Through this process, various fillers are fully mixed with rubber, and the fillers are dispersed as uniformly as possible. The quality of the mixing result directly determines the rubber product. The performance and service life have been widely concerned by the industry. [0003] At present, the preparation methods of CNT / rubber composite materials mainly include traditional methods such as mechanical blending, solution blending, melt blending and emulsion blending. A polymethylphenylsiloxane disclosed in Chinese patent 201510770421.7 The alkane-carbon nanotube-silicone rubber composite material is carried out according to the following steps: Step 1: Mix 90-110 parts by weight of silico...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C21/00B02C19/06B02C19/18B29B7/00
CPCB02C19/06B02C19/18B02C21/00B29B7/002
Inventor 边慧光汪传生李邵明郝国强张璐奇朱逍遥田绪东李利沈波张德伟尹凤福
Owner QINGDAO UNIV OF SCI & TECH
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