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Reverse osmosis membrane and preparation method thereof

A technology of reverse osmosis membrane and palygorskite, applied in the direction of reverse osmosis, semipermeable membrane separation, chemical instruments and methods, etc., can solve the problems of limited application, crystal bundles or aggregates are difficult to disperse uniformly, and achieve strong antifouling performance, good separation performance and the effect of water flux capacity

Inactive Publication Date: 2021-01-19
SHANDONG JIANZHU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, crystal bundles or aggregates with large bulk sizes are difficult to disperse uniformly in other media, which undoubtedly limits its application in many fields

Method used

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  • Reverse osmosis membrane and preparation method thereof
  • Reverse osmosis membrane and preparation method thereof

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Embodiment

[0031] (1) Preparation of KH550 solution: Add KH550 into ethanol, the mass ratio of ethanol to KH550 is 500:1, then stir on a magnetic stirrer for 15 minutes, and finally ultrasonically disperse for 15 minutes to completely hydrolyze it to obtain KH550 hydrolyzed solution ;

[0032] (2) Preparation of modified palygorskite nanoparticles: Palygorskite nanoparticles (diameter 30-60nm, length 500-800nm, cross-sectional area 0.37×0.63 nm 2 ) and KH550 hydrolysis solution are fully mixed according to the palygorskite: KH550 mass ratio of 100:1, and after the ethanol is completely volatilized, dry at 60°C for 10 minutes to obtain modified palygorskite;

[0033] (3) Preparation of aqueous phase solution: add water to 2 g of m-phenylenediamine and 0.1 g of sodium lauryl sulfate to 100 g to obtain an aqueous phase solution;

[0034] (4) Preparation of aqueous phase solution containing modified palygorskite nanoparticles: dissolve the modified palygorskite nanoparticles prepared in ste...

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Abstract

The invention provides a reverse osmosis membrane. The reverse osmosis membrane comprises modified palygorskite nanoparticles, the reverse osmosis membrane comprises a porous support body layer and apolyamide layer, wherein the modified palygorskite nanoparticles are uniformly dispersed in the polyamide layer, and the modified palygorskite nanoparticles are modified by a silane coupling agent KH550. In the process of preparing the reverse osmosis membrane through interfacial polymerization reaction, the KH550 modified palygorskite nanoparticle doped reverse osmosis membrane has good separation performance and water flux capacity, and the membrane has strong antifouling property.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membrane preparation, and in particular relates to a reverse osmosis membrane and a preparation method thereof. Background technique [0002] Today, exponential population growth and poor wastewater management have brought the critical need for clean water of potable quality to greater attention than ever. Membrane desalination technology currently dominates the global market due to its low energy consumption and ease of operation. Reverse osmosis membranes prepared by interfacial polymerization are characterized by ultrathin and highly cross-linked polyamide layers, and have been widely used worldwide due to their excellent water permeability and high salt rejection. However, the trade-off between membrane selectivity and permeability and membrane fouling during reverse osmosis are the main challenges limiting the development of reverse osmosis membranes. To address these issues, high-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D67/00C02F1/44
CPCB01D61/025B01D67/0079C02F1/441
Inventor 刘欢张克峰丁万德吕东晓王珊
Owner SHANDONG JIANZHU UNIV
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