Preparation method of porous polyvinyl chloride-graphene composite material

Abstract

The invention discloses a preparation method of a porous polyvinyl chloride-graphene composite material. According to the preparation method, hydrophobic modified nano-graphene, an N,N-dimethylformamide solution of polyvinyl chloride and sodium chloride are mixed by virtue of a high energy ball milling method, and finally, the mixture is dropwise added into distilled water to form porous polyvinyl chloride-graphene particles; a pore-foaming agent is compatible with water to form a surface layer with less pore structures, the compatiblility speed of the pore-foaming agent with water in a sphere is decreased due to the blockage of the surface layer and generates a pore forming effect in a slow dissolving-out process, and formed holes are uniformly distributed and uniform in particle sizes and have good through-hole and opening performance; meanwhile, by adding hydrophobic modified nano-graphene, the prepared composite material has good hydrophobic property, and a porous structure can be applied to oil-water separation such as water pollution treatment; and furthermore, a process of the preparation process is convenient to industrial control, and the application field of polyvinyl chloride is expanded.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride, in particular to a preparation method of a porous polyvinyl chloride graphene composite material. Background technique [0002] Polyvinyl chloride (PVC) is the most used raw material for plastic products after polyethylene and polypropylene. It has its unique physical and chemical advantages and is widely used in various fields. However, its thermal stability is poor, and it is easy to age and decompose. value. In addition, in recent years, the domestic PVC industry is facing severe challenges such as overcapacity, rising energy prices, fierce market competition, and increasing pressure on environmental protection. At present, many researchers have devoted themselves to the modification of PVC materials to improve their mechanical properties and heat resistance. Common modified fillers mainly include clay, wood flour, wood fiber, crop residues, cellulose, calcium carbonate, etc. Howe...

AI Technical Summary

Problems solved by technology

However, the porous polyvinyl chloride prepared by these methods has either high apparent density and unsatisfactory porosity;