The artificial turf industry is booming, and its consumption is increasing year by year, with an annual growth rate of 20-25%. The application of artificial turf has surpassed stadiums and is widely used in various leisure and decoration fields. It is estimated that the use of artificial turf in the world has reached more than 200 million square meters. The design service life of general artificial turf is 5-8 years, and the special one can reach 10-15 years. After the use period arrives, the abandoned lawn must be recycled, otherwise it will cause a huge waste of resources and environmental hazards.
The main components of artificial turf recycled materials are plastics (LLDPE, PP, PET) and fillers. Because the composition is relatively complex, after the recycled materials are melt blended, the compatibility between the polymers and the fillers is not good, so the mechanical properties of the materials are often poor, which limits the recovery of the recycled materials to a certain extent. The scope of application. Therefore, the main problem that needs to be solved in the recycling of waste artificial turf is the interface compatibility between plastics and with inorganic fillers. Commonly used methods are filler surface modification and compatibilizer interface compatibilization modification.
Artificial turf recycled materials contain a variety of polymers. The properties of the materials after melt blending are determined by the properties of the components in the recycled materials on the one hand, and on the compatibility between the components on the other hand. Due to the low compatibility between the polymers in the recycled materials, the materials obtained after blending show a variety of phases, and the mechanical properties of the materials are poor. In order to improve its physical properties, the interface modification can be used to improve the adhesion between the dispersed phase and the matrix phase, so that the dispersed phase can be better dispersed in the matrix phase and the compatibility between polymers can be improved.
At present, the recycling of waste artificial turf usually requires separating the grass silk, the base fabric and the back glue, and then recycling them separately. This recycling process is cumbersome to operate and the recycling cost is high. Therefore, the development of a recyclable artificial turf conforms to the concepts of modern green chemistry and circular economy, and has important social and economic significance for delaying the depletion of non-renewable resources, protecting the environment and sustainable economic development.
