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A modified spiral nano-carbon fiber and its preparation method and application, a rubber composite material

A technology of nano-carbon fiber and helix, which is applied in the field of preparation of inorganic non-metallic materials, and can solve problems such as difficult bonding, reinforcement effect to be improved, and easy agglomeration

Active Publication Date: 2020-07-24
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the helical carbon nanofibers are easy to agglomerate in the rubber matrix, it is not easy to combine with the rubber molecules, so the reinforcement effect needs to be improved.

Method used

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  • A modified spiral nano-carbon fiber and its preparation method and application, a rubber composite material
  • A modified spiral nano-carbon fiber and its preparation method and application, a rubber composite material
  • A modified spiral nano-carbon fiber and its preparation method and application, a rubber composite material

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preparation example Construction

[0043] The present invention has no special limitation on the preparation method of the above-mentioned rubber composite material, and the preparation method of the rubber composite material well-known to those skilled in the art can be used.

[0044] The elongation at break of the rubber composite material using the modified helical nano-carbon fiber material of the present invention is 13.4% higher than that of the rubber composite material using the unmodified helical nano-carbon fiber material.

Embodiment 1

[0047] A method for modifying helical carbon nanofibers, comprising the following steps:

[0048] (1) 5g spiral nano-carbon fibers are placed in a graphite crucible, sealed with a graphite lid and placed in a vacuum carbon tube furnace; vacuumize to 10 -3 Pa, from room temperature to 1000°C, then heat-treated for 2h, and cooled to room temperature to obtain a graphitized helical nano-carbon fiber material; the heating rate is 8°C / min;

[0049] (2) Mix the graphitized spiral nano-carbon fiber with 150g stainless steel balls and 150mL absolute ethanol in a ball milling tank, place the ball milling tank in a ball mill for ball milling; the speed of ball milling is 200r / min, and the time of ball milling is 4 hours. The mixture was dried in a drying oven at 70°C for 12 hours, then taken out and passed through a 100-mesh sieve to obtain ball-milled helical carbon nanofibers;

[0050] (3) Weigh 5g of ball-milled spiral nano-carbon fiber and place it in a three-necked flask, add 300m...

Embodiment 2

[0057] A method for modifying helical carbon nanofibers, comprising the following steps:

[0058] (1) 5g spiral nano-carbon fibers are placed in a graphite crucible, sealed with a graphite lid and placed in a vacuum carbon tube furnace; vacuumize to 10 -3 Pa, from room temperature to 800°C, then heat-treated for 4h, and cooled to room temperature to obtain graphitized helical nano-carbon fiber material; the heating rate is 9°C / min;

[0059] (2) Mix the graphitized spiral nano-carbon fiber with 150g stainless steel balls and 150mL absolute ethanol in a ball milling jar, place the ball milling jar in a ball mill and carry out ball milling; the rotating speed of ball milling is 400r / min, and the time of ball milling is 8 hours. The mixture was dried in a drying oven at 70°C for 12 hours, then taken out and passed through a 100-mesh sieve to obtain ball-milled helical carbon nanofibers;

[0060] (3) Weigh 5g of ball-milled spiral nano-carbon fiber and place it in a three-necked f...

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Abstract

The invention provides a modification method of helical nano carbon fiber and relates to the technical field of inorganic nonmetallic material preparation. The modification method comprises the following steps: (1) performing heat treatment on helical nano carbon fiber to obtain graphitized helical nano carbon fiber; (2) mixing the graphitized helical nano carbon fiber obtained in the step (1) with ethanol, and performing ball milling to obtain ball-milled helical nano carbon fiber; (3) acidizing the ball-milled helical nano carbon fiber obtained in the step (2), to obtain modified helical nano carbon fiber. According to the modification method provided by the invention, through heat treatment, the helical nano carbon fiber can form carbon fiber with dominant quasi graphite; through the ball milling, the length-diameter ratio of the fiber can reach (10 to 100) to 1; through the acidizing, the oxygen-containing groups on the surface of the helical nano carbon fiber can be increased so as to increase active sites on the surface. Compared with the unmodified helical nano carbon fiber, the modified helical nano carbon fiber provided by the invention can increase the elongation at breakof the rubber composite by 13.4%.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic non-metallic materials, in particular to a modified helical nano-carbon fiber, a preparation method and application thereof, and a rubber composite material. Background technique [0002] Since the beginning of the 20th century, after S.C. Mott discovered the reinforcing effect of carbon black on rubber, the reinforcing effect of carbon black on rubber has become a research hotspot in the field of tire application. So far, carbon black is still the dominant filling material. The inherent "spherical primary particle" morphological structure characteristic of the widely used reinforcing carbon black at this stage has a limited range to improve the performance of the reinforcing rubber. In order to meet the requirements of green tires, it is necessary to find a new structure of reinforcing fillers . [0003] As a new type of carbon material, helical carbon nanofibers (HCNFs) not onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K7/06C09C1/44C09C3/08C09C3/06C09C3/04C08L7/00C08K13/06C08K9/02C08K5/09
CPCC08K5/09C08K7/06C08K9/02C08K13/06C08K2201/011C09C1/44C09C3/006C08L7/00
Inventor 金永中郑星龙房勇陈建何刚黄聪石斌宏
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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