Preparation method of modified-porous-carbon-fiber-loaded calcium chloride hygroscopic material

Abstract

The invention discloses a preparation method of a modified-porous-carbon-fiber-loaded calcium chloride hygroscopic material. The hygroscopic material is made from calcium chloride, sodium carboxymethylcellulose, diatomite powder, coconut shell, phenol, and polyvinyl alcohol. Porous carbon fiber made from coconut shell undergoes multiple modification treatment. The obtained porous carbon fiber is high in mechanical strength and good in adsorbability. The porous carbon fiber itself can adsorb a large amount of water vapour from air, and the porous structure is beneficial for loading calcium chloride. The composite material is good in moisture absorption, and a small amount of added nanometer diatomite provides components with better adhesion and support after moisture absorption, which is beneficial for reuse of the hygroscopic material after high-temperature drying. The hygroscopic material is non-pollution to the environment, is low in application cost, and is super high in economic value and environmental value.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a preparation method of a modified porous carbon fiber-loaded calcium chloride hygroscopic material. Background technique [0002] Hygroscopic materials refer to substances that can absorb moisture from the air. Commonly used solid hygroscopic materials include silica gel, alumina, molecular sieves, etc. These substances have a strong affinity for moisture. Hygroscopic materials are used in a wide range of applications. They can be placed in the closet to absorb moisture and prevent clothes from becoming moldy and smelly. They can be placed in the car to absorb moisture and odors in the car. They can also be placed in the room to absorb moisture in the air and reduce Indoor humidity. [0003] At present, the commonly used hygroscopic materials are divided into disposable hygroscopic materials and hygroscopic materials that can be used repeatedly. Among them,...

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Problems solved by technology

[0003] At present, the commonly used hygroscopic materials are divided into disposable hygroscopic materials and hygroscopic materials that can be used repeatedly. Among them, the most widely used hygroscopic materials are quicklime. Effect, its advantages are low price and large moisture absorption capacity, but the disadvantage is that it is disposable, and after moisture absorption, it becomes a strong alkaline powder, which is difficult to recycle. If it is not disposed of in time, the absorbed moisture will still be released.

[0005] At the same time, because the carbon fiber preparation process includes carbonization or graphitization, the carbon atom stacking orientation on the carbon fiber surface is more consistent, and the atomic layer spacing is smaller, so the fiber surface is non-polar and chemically inert. In addition, the carbon fiber surface has hydrophobic, Shortcomings such as smoothness and low adsorption performance lead to poor interfacial bonding between carbon fiber and its composite material