Self-adaptive microcapsule for packaging dust suppressant calcium alginate, preparation method of self-adaptive microcapsule and bio-based dust suppression material

Abstract

The invention provides a self-adaptive microcapsule for packaging dust suppressant calcium alginate, a preparation method of the self-adaptive microcapsule and a bio-based dust suppression material. The self-adaptive microcapsule is prepared from the following components in percentage by mass: 1%-2.5% of dimethyl diallyl ammonium chloride, 1%-2.5% of cellulose nanofibril, 5%-10% of acrylic acid, 0.125%-0.25% of an initiator, 0.09%-0.18% of a cross-linking agent and the balance of water. The self-adaptive microcapsule is adjusted to be neutral by using an alkaline pH regulator. The self-adaptive microcapsule can be used in cooperation with a conventional dust suppressant or the bio-based dust suppression material. The conventional dust suppressant or the bio-based dust suppression material plays a role in moisture absorption in the early stage, and the dust suppression microcapsule plays a role in water retention in the later stage. The dust suppression microcapsule and the dust suppressant or the bio-based dust suppression material perform respective functions, the water retention time of the dust suppressant is prolonged to the maximum extent, and synergistic dust suppression is achieved.

Description

technical field [0001] The invention belongs to the field of dust suppression in coal mines and the field of microcapsule technology, and in particular relates to a self-adaptive microcapsule of an encapsulated dust suppressant calcium alginate, a preparation method and a bio-based dust suppression material. Background technique [0002] The quality of the ecological environment plays a vital role in the survival and development of human beings and other organisms. A large amount of dust is produced during the production and operation of open-pit mines, known as the "invisible killer", and has become the main factor restricting the safety of coal mine production in recent years. The hazards of coal dust mainly include pneumoconiosis, environmental pollution, wearing equipment and coal dust explosion. According to incomplete statistics, in the past ten years, China has reported 272,000 cases of occupational diseases, including 212,000 cases of occupational pneumoconiosis, ac...

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Problems solved by technology

[0006] (1) Although there are many types of existing chemical dust suppressants, there are some common problems, such as single function, high price, and even a series of disadvantages such as toxicity, corrosion, refractory degradation and secondary pollution, etc. application limited

In the actual application process, the conventional dust suppressant plays the role of moisture absorption and water retention in the early stage, but the action time is short, which is not conducive to cost control

[0007] (2) Although slow-release microcapsules have been applied in many fields, they still belong to a technical gap in coal mine dust control

[0008] (3) The reagents used in the preparation process of similar products are poisonous and harmful, which will cause secondary pollution to the environment and pose a certain threat to human life and health

[0009] (4) About one million tons of peanut shells are produced in China every year, but most of them are discarded or burned, resulting in a huge waste of resources

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