CN212039898U

CN212039898U - Durable reverse osmosis composite membrane

Info

Publication number: CN212039898U
Application number: CN202020241655.9U
Authority: CN
Inventors: 沈勤梁; 李正勇
Original assignee: Hangzhou Aoke Filtering Technology Co ltd
Current assignee: Hunan Aoke Environmental Protection Technology Co.,Ltd.
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-12-01
Anticipated expiration: 2030-03-03

Abstract

The utility model discloses a durable type reverse osmosis complex film, including warp knitting net fibre supporting layer, polyethylene adhesive linkage, polysulfone ultrafiltration rete and porous carbon membrane active layer, warp knitting net fibre supporting layer with pass through between the polysulfone ultrafiltration rete the common heat seal lamination of polyethylene adhesive linkage becomes integrative, the coating on polysulfone ultrafiltration rete surface has porous carbon membrane active layer, polyethylene adhesive linkage thickness is 10 mu m to 200 mu m, polysulfone ultrafiltration rete thickness is 20 mu m to 100 mu m, porous carbon membrane active layer thickness is 5nm to 100 nm. Has excellent membrane strength and separation permeability, good peeling resistance and durable use.

Description

Durable reverse osmosis composite membrane

Technical Field

The utility model relates to a membrane separation technical field of water treatment especially relates to a durable type reverse osmosis complex film.

Background

Membrane separation technology has gradually occupied an important position in the field of water and other liquid separation as a novel, efficient and energy-saving separation technology. The membrane material is also developed from an initial single asymmetric cellulose acetate membrane to a novel material and a high-efficiency membrane such as a cross-linked aromatic polyamide composite membrane prepared by a surface polymerization technology. The reverse osmosis method has the advantages of compact equipment configuration, small occupied area, low water yield per unit volume, low energy consumption and the like, is driven by pressure higher than osmotic pressure under the condition of no phase change, flows out desalted water through the capillary action of a membrane, has the sieving effect of the membrane and can remove tiny bacteria, viruses and the like. However, an ultrafiltration membrane having a low tensile strength is generally used as the support layer, and therefore, the separation resistance is poor, the membrane is not durable in use, and the life is short.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a durable type reverse osmosis complex film, has excellent membrane strength and separation permeability concurrently, and resistant performance of peeling off is good, durable use.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

The durable reverse osmosis composite membrane comprises a warp-knitted net fiber supporting layer, a polyethylene bonding layer, a polysulfone ultrafiltration membrane layer and a porous carbon membrane active layer, wherein the warp-knitted net fiber supporting layer and the polysulfone ultrafiltration membrane layer are jointly laminated into a whole through the polyethylene bonding layer in a hot pressing mode, the porous carbon membrane active layer is coated on the surface of the polysulfone ultrafiltration membrane layer, the thickness of the polyethylene bonding layer is 10-200 mu m, the thickness of the polysulfone ultrafiltration membrane layer is 20-100 mu m, and the thickness of the porous carbon membrane active layer is 5-100 nm.

Preferably, the warp-knitted web fibre support layer has a thickness of 0.1mm to 1.5 mm.

Preferably, the warp-knitted web fibre support layer has a thickness of not less than 0.5 mm.

Preferably, the warp-knitted mesh fiber support layer is polyethylene fiber or polypropylene fiber.

Preferably, the thickness of the polyethylene bonding layer is 20 μm to 100 μm.

Preferably, the pore diameter of the micropores of the polysulfone ultrafiltration membrane layer is 0.001 to 0.1 μm.

Preferably, the porosity of the polysulfone ultrafiltration membrane layer is 55% to 85%.

Preferably, the thickness of the polysulfone ultrafiltration membrane layer is not more than 80 μm.

The utility model has the advantages that:

1. the porous carbon membrane active layer is penetrated into micropores of the polysulfone ultrafiltration membrane layer to be combined into a whole, the bonding strength is high, the diffusion and separation of solutes in the solution are facilitated, and the reverse osmosis process is efficiently realized.

2. The polyethylene bonding layer is a porous film layer, which is beneficial to dispersing stress, and the warp-knitted net fiber supporting layer and the polysulfone ultrafiltration film layer are laminated into a whole through the polyethylene bonding layer, so that the bonding strength is high, the stripping resistance is good, the service life is durable, and the service life is prolonged.

3. The polysulfone ultrafiltration membrane layer has high porosity and reasonable pore size design, improves the pressure resistance and permeability, and has good chemical stability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Reference numerals: 1-warp-knitted net fiber supporting layer, 2-polyethylene bonding layer, 3-polysulfone ultrafiltration membrane layer and 4-porous carbon membrane active layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a durable type reverse osmosis composite membrane, including warp knitting net fiber supporting layer 1, polyethylene adhesive linkage 2, polysulfone ultrafiltration rete 3 and porous carbon membrane active layer 4, warp knitting net fiber supporting layer 1 with pass through between the polysulfone ultrafiltration rete 3 polyethylene adhesive linkage 2 heat seal lamination is integrative jointly, polysulfone ultrafiltration rete 3 coats on the surface and is coated porous carbon membrane active layer 4. The warp-knitted net fiber supporting layer 1 can be made of polyethylene fibers or polypropylene fibers, and the polyethylene fibers are better combined with the polyethylene bonding layer 2. The thickness of the warp-knitted net fiber support layer 1 is 0.1mm to 1.5mm, and preferably, the thickness is not less than 0.5 mm. The thickness of the polyethylene bonding layer is 10-200 μm, and preferably, the thickness is 20-100 μm. The pore diameter of the micropores of the polysulfone ultrafiltration membrane layer 3 is 0.001-0.1 μm, the porosity is 55-85%, the strength and the permeability of the membrane are both considered, the thickness of the polysulfone ultrafiltration membrane layer is 20-100 μm, and the preferable thickness is not more than 80 μm. The thickness of the active layer of the porous carbon film is 5nm to 100 nm.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The durable reverse osmosis composite membrane is characterized in that: the carbon membrane composite membrane comprises a warp-knitted net fiber supporting layer (1), a polyethylene bonding layer (2), a polysulfone ultrafiltration membrane layer (3) and a porous carbon membrane active layer (4), wherein the warp-knitted net fiber supporting layer (1) and the polysulfone ultrafiltration membrane layer (3) are jointly laminated into a whole through the polyethylene bonding layer (2), the porous carbon membrane active layer (4) is coated on the surface of the polysulfone ultrafiltration membrane layer (3), the thickness of the polyethylene bonding layer (2) is 10-200 mu m, the thickness of the polysulfone ultrafiltration membrane layer (3) is 20-100 mu m, and the thickness of the porous carbon membrane active layer (4) is 5-100 nm.

2. A durable reverse osmosis composite membrane according to claim 1, wherein: the thickness of the warp-knitted net fiber support layer (1) is 0.1mm to 1.5 mm.

3. A durable reverse osmosis composite membrane according to claim 2, wherein: the thickness of the warp-knitted net fiber support layer (1) is not less than 0.5 mm.

4. A durable reverse osmosis composite membrane according to claim 1, wherein: the warp-knitted net fiber support layer (1) is made of polyethylene fibers or polypropylene fibers.

5. A durable reverse osmosis composite membrane according to claim 1, wherein: the thickness of the polyethylene bonding layer (2) is 20-100 μm.

6. A durable reverse osmosis composite membrane according to claim 1, wherein: the pore diameter of the micropores of the polysulfone ultrafiltration membrane layer (3) is 0.001 to 0.1 μm.

7. A durable reverse osmosis composite membrane according to claim 1, wherein: the porosity of the polysulfone ultrafiltration membrane layer (3) is 55% to 85%.

8. A durable reverse osmosis composite membrane according to claim 1, wherein: the thickness of the polysulfone ultrafiltration membrane layer (3) is not more than 80 μm.