Composite ultrafiltration membrane and preparation method thereof

Abstract

The invention discloses a composite ultrafiltration membrane and a preparation method thereof. The composite ultrafiltration membrane comprises the following raw materials in portion by weight: 6 to 9 portions of polyether sulfone and 1.4 to 2.2 portions of cellulose powder. The composite ultrafiltration membrane material has good hydrophilicity and overcomes the defects of poor hydrophilicity and weak pollution resistance of a polyether sulfone ultrafiltration membrane material, because cellulose molecular chains are provided with a plurality of hydroxyl groups. The composite membrane material has strong pollution resistance, high water flux, good retention characteristic and high strength, prolongs the service life of the ultrafiltration membrane, and saves the production cost.

Description

technical field

[0001] The invention relates to an ultrafiltration membrane used in a separation process and a preparation method thereof, in particular to a polyethersulfone composite ultrafiltration membrane and a preparation method thereof. Background technique

[0002] Membrane separation technology refers to the separation, classification, purification and enrichment of solutes and solvents in mixtures under the promotion of external energy or chemical potential difference by means of selective osmosis of membranes. As an efficient separation technology, membrane separation technology has been widely used in chemical industry, environmental protection, electronics, light industry, textile, petroleum, food, medicine, bioengineering, energy engineering and other fields. Foreign experts even call the development of membrane separation technology the "third industrial revolution", which is considered to be one of the most promising high-tech technologies from the end of the...