Plastic master batch and preparation method and application thereof

Abstract

The invention discloses a plastic master batch, and a preparation method and application thereof. The plastic master batch comprises a polymer matrix, graphene, a filling material, a coating agent, adispersant, an antioxidant, a crosslinking agent and an assistant crosslinking agent. Therefore, the plastic master batch has the characteristics of high thermal conductivity, high oxygen resistance,easiness in welding and uniform dispersion of graphene; and therefore, a capillary network prepared from the plastic master batch has the advantages of high thermal conductivity, high oxygen resistance and easiness in welding, so that cold and heat in a system are quickly transferred to the outside, efficient circulation of a medium is realized, energy waste is avoided, and popularization and application of a capillary network air conditioning system are facilitated.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a plastic masterbatch and a preparation method and application thereof. Background technique [0002] The capillary network air conditioning system is a water-carrying medium. The capillary network (generally 4.3mm in diameter) or the cooling and heating module is used as the main heat transfer device to change the temperature of the building wall or maintain the temperature of the structure, so as to achieve the purpose of indoor cooling and heating. air conditioning system. The air-conditioning system is an invisible air-conditioning system that can be laid on ceilings, walls and floors, and mainly uses surface heat transfer to change the indoor temperature. It is currently the most advanced and most comfortable air-conditioning technology. Compared with metal tubes, plastic capillary products have a lower cost under the same radiation capacity, and at the...

AI Technical Summary

Problems solved by technology

[0004] (1) The layer-to-layer interaction of graphene nanosheets is strong, easy to stack and agglomerate together, it is difficult to fully peel off and evenly disperse in the polymer matrix, and cannot effectively build a uniform and stable network. The main obstacle to exert high thermal conductivity and high oxygen resistance performance in the capillary network air conditioning system;

[0005] (2) The density of graphene powder is low, and the density difference between the polymer matrix and the polymer matrix is ​​large. It is difficult to achieve high-concentration filling in the process of blending and granulation, which makes the processing of masterbatch difficult, and it is easy to have some high or low concentrations. However, it is difficult to stably realize high-content filling of graphene;

[0006] (3) The traditional capillary network uses PPR, PE, PB and other materials, the thermal conductivity is 0.2-0.3W / mK, and the thermal conductivity is poor, resulting in low heating or cooling efficiency, and cannot quickly transfer the cold and heat in the system to the outside world , resulting in low-efficiency circulation of media and waste of energy, which limits the popularization and application of capillary network air conditioning systems;

[0007] (4) Ordinary capillary network has poor oxygen barrier performance and cannot meet the requirements of the national standard GB / T 28799.2-2012 and GB / T18742.2-2017 for oxygen barrier pipes (oxygen permeability 3. d), under long-term use, oxygen molecules enter the interior of the pipe, which is easy to accelerate the thermal oxygen aging of the pipe, and breed bacteria and microorganisms in the pipe, block the pipe, and affect the use

In the pipe industry, co-extrusion is generally used to add three to five layers of EVOH oxygen barrier layer, which is not only complicated in processing technology, but also high in cost.

At the same time, the capillary structure is relatively complex, and the diameter of the capillary is only 4.3mm, which undoubtedly adds another difficulty in increasing the oxygen barrier layer.

[0008] (5) Ordinary capillary network is susceptible to the influence of inorganic fillers in the process of hot-melt connection between capillary and main tube, resulting in loose bonding between tubes and weak welding. Long-term use may cause cracks and water seepage at the joints of the tubes Water leakage poses a certain risk to the safety of the product

Images