Polyester Nonwoven Fabric of Ro System Component

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Polyester Nonwoven Fabric of Ro System Component

Posted By ko koele     February 26, 2020    

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The composite Ro System Component(KOKOELECTRIC) and cellulose acetate ro system component are two common reverse osmosis membrane materials on the scene at present.

(1) The composite ro system component

The main supporting structure of the composite membrane is the polyester nonwoven fabric calendered by the calendar. The surface of the polyester nonwoven fabric is free of loose fibres and hard and smooth. Because the polyester nonwoven fabric is very irregular and too loose to be suitable as the bottom layer of the salt barrier layer, microporous engineering plastic polysulfone is poured on the surface of the nonwoven fabric. The pores on the surface of the polysulfone layer are controlled at about 15nm. The barrier layer is made of aromatic polyamide with a high crosslinking degree and the thickness is about 0.2um.

(2) cellulose acetate ro system component

Cellulose is generally esterified to produce triacetate fibres, which are then hydrolyzed twice to form mixed mono-,di-and triacetate fibres. The most important factor affecting the desalting rate and water yield of the membrane is that high acetyl content results in high desalting rate but low water yield.

The essential weakness of cellulose acetate membrane is that with the passage of time, ester functional groups will hydrolyze, while the desalting rate will gradually decrease and the flow rate will increase. With the enhancement of hydrolysis, the membrane will be more vulnerable to microbial invasion, and the membrane itself will lose its function and integrity.

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