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Method for preparing high value rubber fillers based on pyrolysis of shrimp and crab based shells and high value rubber filler product

A technology for rubber fillers and shells, applied in fibrous fillers, dyed low-molecular organic compound treatment, calcium carbonate/strontium/barium, etc., can solve the problem of increasing the cost of calcium carbonate fillers, harsh conditions for calcium carbonate modification, polymer Performance impact and other issues, to achieve the effect of improving the scope of application, increasing the specific surface area, and not easy to agglomerate

Active Publication Date: 2019-07-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, further studies have shown that this type of method usually uses industrial grade calcium carbonate, and requires the use of expensive compounds in the modification process, which increases the cost of using calcium carbonate fillers
On the other hand, the modification conditions of calcium carbonate are relatively harsh, and the addition of modifiers often has some negative effects on the performance of the polymer.

Method used

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  • Method for preparing high value rubber fillers based on pyrolysis of shrimp and crab based shells and high value rubber filler product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Shell pretreatment: After washing the shrimp shell with clean water, it is crushed to obtain a shell powder sample with a particle size of 0.5-1 cm;

[0042] (2) Preparation of pyrolytic carbon by pyrolyzing the shell powder sample: heat the shell powder sample placed in the reactor by an external heat source, and control the internal temperature of the reactor to 450°C, the temperature of the heat transfer medium bulb to about 570°C, and the thermal The decomposition time is 8 hours; before the start of the pyrolysis, excessive inert gas is passed into the reactor to discharge the air, and the ventilation is stopped after the reaction starts, and the broken shell material is decomposed into semi-coke components and volatile components by heating, and the semi-coke components follow the reaction The lifting plate in the device moves together, and is continuously impacted by the heat transfer medium ball and assists in heat transfer, and at the same time interacts with ...

Embodiment 2

[0049] (1) Shell pretreatment: After washing the shrimp shell with clean water, it is crushed to obtain a shell powder sample with a particle size of 1 to 2 cm;

[0050] (2) Preparation of pyrolytic carbon by pyrolyzing the shell powder sample: heat the shell powder sample placed in the reactor by an external heat source, and control the internal temperature of the reactor to 300 °C, the temperature of the heat transfer medium bulb to about 500 °C, and the thermal The decomposition time is 24 hours; before the start of the pyrolysis, excessive inert gas is passed into the reactor to discharge the air, and the ventilation is stopped after the reaction starts, and the broken material of the shell is decomposed into semi-coke components and volatile components by heating, and the semi-coke components are followed by the reaction The lifting plate in the device moves together, and is continuously impacted by the heat transfer medium ball and assists in heat transfer, and at the sam...

Embodiment 3

[0054] (1) Shell pretreatment: After cleaning the crab shell with clean water, it is crushed to obtain a shell powder sample with a particle size of 1 to 1.5 cm;

[0055] (2) Preparation of pyrolytic carbon by pyrolyzing the shell powder sample: heat the shell powder sample placed in the reactor by an external heat source, and control the internal temperature of the reactor to 600°C, the temperature of the heat transfer medium bulb to about 660°C, and the thermal The decomposition time is 5.5 hours; before the start of pyrolysis, excessive inert gas is passed into the reactor to discharge the air, and the ventilation is stopped after the reaction starts, and the broken material of the shell is decomposed into semi-coke components and volatile components by heating, and the semi-coke components follow the The lifting plate in the reactor moves together, and is constantly impacted by the heat transfer medium ball to assist in heat transfer, and at the same time interacts with the...

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Abstract

The invention belongs to the relevant technical field of rubber filler preparation and discloses a method for preparing high value rubber fillers based on pyrolysis of shrimp and crab based shells. The method includes: pretreatment of shrimp and crab shells; pyrolysis of a shell powder sample to prepare pyrolysis carbon; cleaning, drying and grinding treatment of the pyrolysis carbon. By the design of reaction participants and a pyrolysis process line, nanoscale calcium carbonate particles can be obtained assuredly; high stiffness and toughness of the fillers can be improved by combining withorganic components; in addition, a special auxiliary agent is added in the post-pyrolysis process of the pyrolysis carbon, the actual test result shows that the rigidity, the tensile strength, the permeability, the flame resistance and the heat resistance of rubber can be improved; the invention further discloses a corresponding rubber filler product. The process flow is relatively simple, the reaction conditions are easy to control, the preparation cost is low, environmental pollution caused by the treatment of the shrimp and crab shells can be reduced, and resource utilization can be realized.

Description

technical field [0001] The invention belongs to the technical field related to the preparation of rubber fillers, and more specifically relates to a method and product for preparing high-value rubber fillers based on pyrolysis of shrimp and crab-based shells. Background technique [0002] As we all know, calcium carbonate, as one of the most important inorganic fillers, is widely used in rubber, plastic, paper and other industries. The influence of rubber fillers on the mechanical properties of polymers depends mainly on their particle size, shape, surface properties and degree of dispersion. For calcium carbonate, the biggest problem as a rubber filler is hydrophilicity, which will lead to uneven bonding with the polymer matrix interface and uneven dispersion, thereby affecting the mechanical properties of the material. Due to the poor dispersion of pure calcium carbonate particles in the polymer matrix, a large number of researchers use hydrophobic coupling agents or reac...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C08K9/04C08K3/26C01F11/18
CPCC01F11/18C01P2004/60C01P2006/12C08K3/26C08K9/04C08K2003/265C08K2201/011C09C1/021C09C3/08
Inventor 胡红云章鹏超谢康邓雨婷杨宇涵杨福唐华姚洪
Owner HUAZHONG UNIV OF SCI & TECH
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