Preparation technology of diethylene triamine pentacetic acid modified polyvinylidene fluoride separation membrane and resin

Abstract

The invention provides a technology for preparing a diethylene triamine pentacetic acid modified polyvinylidene fluoride separation membrane by a physical blending / phase transition technology and a chemical grafting blending / phase transition technology. The technology is as follows: reagents such as diethylene triamine pentacetic acid, polyvinylidene fluoride, melamine, dimethyl sulfoxide, acrylic acid, polyvinylpyrrolidone and the like are taken as raw materials; diethylene triamine pentacetic acid polyamino and polycarboxylic acid compound is uniformly mixed in a polyvinylidene fluoride separation membrane and resin respectively by the physical blending / phase transition technology and the chemical grafting blending / phase transition technology. The technology improves the hydrophobic properties of the conventional polyvinylidene fluoride micro-filtration separation film and the resin, realizes metallic ions in waste water, and has the advantages of simple operation, uniform blending and the like. The diethylene triamine pentacetic acid modified polyvinylidene fluoride separation membrane and the resin increase the purification efficiency of drinking water, realize the resource utilization of the heavy metal in the industrial wastewater, and expand the application field of the polyvinylidene fluoride micro-filtration separation film.

Description

technical field [0001] The present invention relates to the performance improvement of polyvinylidene fluoride macromolecular materials, in particular to a kind of reagents such as diethylenetriaminepentaacetic acid, melamine, dimethyl sulfoxide, acrylic acid and terephthaloyl peroxide as raw materials. Physical blending / phase transfer technology and chemical graft blending / phase transfer technology, preparation process for modifying polyvinylidene fluoride separation membrane and resin. Background technique [0002] Polyvinylidene fluoride separation membrane technology has the advantages of normal temperature operation, no phase change, obvious energy saving effect, high filtration accuracy, low production pollution, large water output and good quality. Through the screening and interception of the membrane, it has an excellent removal effect on suspended particles and colloidal pollutants in the water body. Polyvinylidene fluoride separation membranes have excellent poll...

AI Technical Summary

Problems solved by technology

However, surface grafting modification will have adverse effects on the physical properties of the separation membrane and resin, such as changing the microporous structure and pore size distribution on the surface of the separation membrane and resin, and the grafted hydrophilic groups will fall off. The polyvinylidene fluoride separation membrane and resin have low removal efficiency of complexed heavy metal ions in water, etc. The existence of these problems will affect the performance of polyvinylidene fluoride separation membrane and resin, and ultimately limit the performance of polyvinylidene fluoride separation membrane and resin. Applications in various fields